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EyeLink 1000 Installation Guide

1. 30 5 5 Pat Cae tin Wie ADOS EE EE E iR 31 2005 2010 SR Research Ltd EN 5 6 Adjusting the Tension Points on the LCD Arm eeeeeeee 33 5 7 LCD Arm Mount Adjustments for Monocular and Remote Recording 33 5 8 Disassembling and Transporting the LCD Arm Mount 34 5 8 1 Option 1 Remove LCD Arm and Camera Assembly as a Unit 35 5 8 2 Option 2 Remove Camera Assembly then Remove the LCD Arm 35 6 Primate Mount Installation r ennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne 36 6 1 Primate Mount Hardware Considerations eese 37 7 Long Range Mount Installation eere eene 40 real Description of the Components serin Soe cswesdecdraeuwsreeacetusdaiicasmeeageonaes 40 7 2 Overview or Setting the Mount sseeressssssseseeeessssssssecreessessseeeeeee 41 7 3 Securing the EyeLink 1000 Fiber Optic Camera Head 42 7 4 Securing Me TITAIHDIAHOE oreore sorpi pista atio EREEREER 43 7 9 Affixing the Mounting Bat cc cece cece cece cence ee eeeeeeeeeeeaseeeeneeeeneeees 44 7 6 Cabling for Long Range System ccecesseeeeeeeee een eene ehh rn na s 44 Tf Long Range Camera Setup sense G arena 46 7 7 1 Acquire Preliminary Measurements esses esee nnns 46 7 7 2 Assemble the Long Range Mount Components esses 46 7 7
2. viii Copy these files to the root directory of the EyeLink 1000 drive on your computer 3 To return Windows so that it hides operating system files complete the following steps i Select the Tools gt Folder Options menu in Windows Explorer ii Select the View tab iii Deselect the Show hidden files and folders option under Hidden files and folders iv Check the Hide protected Operating system files 4 If you have a PS 2 keyboard please continue to section 11 6 Transfer the System to make the EyeLink Partition Bootable 11 5 Configuring the Keyboard The PS 2 keyboard is the default driver setup within the EyeLink Host directory and is the only keyboard hardware recommended for the latest versions of the Host Application 11 6 Transfer the System to make the EyeLink Partition Bootable 1 Insert the CD labeled ROM DOS Boot Disk that came with the EyeLink 1000 system and restart the system as you normally would via Windows The next step is to boot off of the CD You may need to press F12 before System Commander is run to boot off of the CD ROM device With some newer types of hardware choosing to boot from the CD ROM from within System Commander does not work as desired 2 You will know that you have successfully booted from the CD ROM of you are given a ROM DOS command prompt IMPORTANT The following step requires you to determine the correct drive letter c d etc for the EyeLink 1000 partit
3. use the and buttons to change both large and small icons to OS 4 Click OK to finish Then from the Settings window select Order Add and Remove as illustrated in Figure 11 10 5 From the Order Add and Remove window remove all icons except for the Windows XP and EyeLink by highlighting each one and clicking the Remove button as in the right side of Figure 11 10 6 Highlight the EyeLink OS and click the Top button to make EyeLink the default partition 7 Click OK to finish and close the Order and Remove window Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd Timeouts and default OS Hardware General Specific OS options Password security File management Order Add and Remove Description and icons N Assistance and Help Default name FAT 32 OS Eyelink PE POE EN E t Timeouts and default OS au KREIS S Sem Hardware oi ed General Specific OS options Password security File management Order Add and Remove Description and icons ls Assistance and Help peed cies Se SOR EEA KS SEM ET up Down i Top Bottom Add Remove Figure 11 10 Order Add and Remove 11 8 Automated boot into the EyeLink 1000 Operating System 1 If you would like System Commander to automatically boot into the EyeLink partition click on Timeouts and default OS from the Settings w
4. You are only licensed for 1 copy of this software for use on the EyeLink 1000 Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd Host PC The installer will prompt you to create Rescue Disks to register to check for updates from the web etc None of these steps is critical so they may be skipped 4 After installation run the System Commander program by going to the Windows Start Menu and selecting the System Commander entry o A Utility Wizard dialog box will automatically be displayed see Figure 11 2 select the Enable System Commander entry click on Next exit the System Commander program and restart the computer booting from the System Commander Boot CD supplied x Please select an option below V Make Boot Restart Diskette s Enable System Commander C Disable Uninstall System Commander Settings JV Show this wizard at startup tees Figure 11 2 Enable System Commander 11 2 Resize Existing Disk Partition The next step is to resize the existing partition to make space for a 5GB EyeLink Host Application partition Insert the supplied System Commander Boot CD into the CD drive and restart the computer booting from the CD You may need to configure your BIOS boot order so that the CD is first in the Boot Priority On Dell PCs Press F12 to get the Boot Menu and the select Internal CD as the boot device Once you have booted from t
5. right side when viewed looking into the camera is a good position to start with This has the camera centrally viewing the eye s and the illumination off to the side Depending upon your tracking situation there are a few considerations in optimal placement of these components e The Camera Head always needs an unobstructed line of sight view to the eye s to be tracked e Which eye will be tracked the dominant eye Left or right Having the Camera Head on the same side as the eye to be tracked may allow one to avoid obstructions e Is binocular tracking required For binocular tracking a more centered camera view is desirable e Illuminator placement does not have to be perfect as long as there are no obstructions causing a shadow to be cast across the eye s to be tracked The Camera Head and Illuminator can be positioned on either side of the Mounting Bar but a peripheral illumination source is likely to be desirable so that the camera can have a view of the eye that is as perpendicular as possible Having a view of both eyes will enable binocular recording or the easy ability to switch between recording left or right eye something that may not be possible when the Camera Head is more peripherally placed Having said this there may be situations e g the Siemens 32 channel head coil or the 8 channel head coil used with the Siemen s Philips and General Electric Scanners where more peripheral placement of the Camera H
6. 12 Tray Mount for Siemens family of scanners pictured from above with optional screen left from behind with screen top middle and configured for user supplied screen bottom middle riser block on screen top right and from SOL DOLOS i P 55 Figure 8 1 Booting into the EyeLink Partition erarenvrnnernnvrnnrnnnrnnvennvennrenernnvrnnnennnenner 65 Figure 8 2 Host Application Camera Setup Screen rrnnvrnnvrnnrnnnennvennvennrnnerenvrnnvenneenne 66 Figure 8 3 Host PC Set Options Screen rrrnrrnnernrrnvrnnennennvrnnennennennnennennaennenneennennennuenee 66 Figure 8 4 Measuring screen phys cords esses nnns 69 Figure 10 1 High Speed Frame Grabber rrrnrennvrnnrenernnvennvrnnrnnnrnnverneennnrnnvennennnennnenner 76 Figure 10 2 D Link Ethernet Card i siicasictecivecadiauseetindinsnnaedaressanianesdicncsstemmsiedanewseneeddvecsias VA el NI C feb o mai oou uide tema dun mu M SM ere NT E DE 11 Ioa paucae Li Licence Code ENU ae 78 Figure 11 2 Enable System Commander rrnnrnnvvnnvrnnvnnernnvennvennrnnnennnenneennnennvennrnnnennnenne 79 Figure 11 3 Select Partitioning then Manual Partitioning euseessssss 79 Figure 11 4 Partition Selection and Resizing rrnrennrnnernnvrnnvrnnrnnnennverneennrnnernnerrnnenneenne 80 2005 2010 SR Research Ltd EN Figure 11 5 Partition and Partition Type Selection esee 80 Figure 11 6 Create a Custom FAT 32 P
7. 2000 Hz monocularly or 1000 Hz binocularly with the 2000 Hz camera upgrade The angle of the camera should be adjusted differently depending on the mount type you plan to use Each mount type works optimally with different camera lenses see Table 2 Camera Cap must be on Hole Camera Screw D EyeLink 1000 High speed Camera Desktop Optics Stand rear view Figure 4 2 Desktop Mount Camera Adjustment Follow the steps below to mount the high speed camera for monocular tracking or to use the EyeLink Remote in the Camera Level position see Figure 4 3 Desktop Mount EyeLink Remote Installation 2005 2010 SR Research Ltd 1 Place the Desktop Mount on the table Turn the recommended camera lens into the thread on the Standard Camera or the Fiber Optic Camera Head See Table 2 for recommended lens usage The 35 mm lens is recommended for the Desktop Mount monocular setup whereas the 16 mm lens should be exclusively used for the Remote tracking 2 Move the camera screw to the top end of the slot on the Desktop Mount 3 Hold the camera with its elongation parallel to the table and level with the top of the mount align the hole on the camera to the camera screw on desktop mount and then tighten the camera screw Dimples in the camera align with protrusions on the mount to ensure the camera is in the right position If you are using the Fiber Optic Camera make sure the fiber optic cable is not twisted or ben
8. 3 Align the Camera Head and lIlluminator cesses 48 7 7 4 Put the Mount into Position and Find the Eye esses 49 7 8 Installation mm MEG ROOM uestre thee rio erd gas NNER EE EEEE EEPE o0 7 9 MIT MN 52 7 9 1 Determine the Mount and Configuration to Use sess 53 7 9 2 Mounting the Camera Head and Illuminator 2 sessssss 5 yu EAN 59 7 9 4 Measuring and Using the Eye to Camera Distance suus 60 7 9 5 Align the Camera Head and lIlluminator cecsessesssess 60 7 9 6 Puta Volunteer Confederate in the Scanner and Find the Eye s 60 7 9 7 Adjust Image Thresholds and Focus the Lens esses 61 7 10 Calibration and Drift Correcting with the Long Range System 62 7 10 1 Calibrating Atypical Spatial Areas esses 62 VNIOS Dr COTE OOT m RM 63 8 Testing the Host PC Installation eene eese 65 8 1 Running the EyeLink Host Program esses enhn 65 8 2 Troubleshooting ISstt ctloFlS eiie raid Una Pr UR orba epi rs Do eo E Eg Reiip Res 67 LES 2005 2009 SR Research Ltd 8 2 1 SCD file does not OUST uec iai xa rt orem bkn eet e aet te niu di 67 SEE ING Hardware EEE EEE 67 0 2 9 BJjeLNK cCLoamera not NU wwsactcccseanesemnavuiennceinonseaennssnguaonsancawisormeseauns 67 O25 ERROR OS NNN 67 8 2
9. 70 cm from where the participant s eyes will typically be with the illuminator and eye camera facing the participant The recommended tracking distance is 50 to 55 cm The camera screw of the Desktop Mount should be aligned to the center of the display PC monitor and the top of the illuminator should be as close to the lower edge of the visible part of the monitor to maximize the eye tracking range If you are using the chin rest supplied by SR Research Ltd please check whether the table is suitable for mounting the chin rest the table used should have a minimum thickness of 1 8 cm and a maximum thickness of 8 0 cm Loosen the table clamp by turning the knob counterclockwise place the table clamp fully onto the table and then tighten it clockwise Check that it is firmly secured by gently attempting to rock the table clamp base free If the table clamp base wobbles tighten it further Next place the forehead rest over the chinrest poles and tighten the knobs at the desired height Please check that the chinrest is horizontally centered with the monitor Adjust the tilt of the monitor so that the display is tilted up slightly The tilt can be changed if there are any reflection issues Please follow Section 8 4 Customizing Your PHYSICAL INI Settings to modify the PHYSICAL INI file settings Desktop Mount EyeLink Remote Installation 2005 2010 SR Research Ltd 43 EyeLink Remote Hardware Adjustment for the Desktop Mount
10. 9 Error No Optilink head found esses 68 8 3 EyeLink Data SiOLABe co sioe seus eras re ope etr ses NEE IN EEE REREN veda 68 8 4 Customizing Your PHYSICAL INI Settings eese en 68 8 4 1 Measuring screen phys coords esses esee nnne nnne 69 8 4 2 Measuring screen ASLONGO eser eunte buio a FERRE EFE NEA DEERU MUSS Y A ERAS ER PERDE 70 8 4 3 Entering Values into PHYSICAL INI renrennnnnnennennernneenennennennneenennenneenenne 70 9 Display PC Software Installation eere 72 9 1 M andows InstallatlOEtisesssseuseiied ptr rosea ene d e ORE UT UnEORSE EE NE MEME 12 9 1 1 Installing the EyeLink 1000 Experiment Programming Kit 2 01 2 Installing the IO Port Access Dineruuuauvresinensumedsnmeenasmmjirne 72 9 1 3 Installing the EyeLink Data Viewer and Experiment Builder Software 73 914 USB license Key hslalanon vavssdsukasdermeriereskemdene 73 9 1 5 Setting up EyeLink 1000 Network Connection rrrarnnnnnnnrnnnnenerenernnsnnn 73 9 1 6 System and Programming Tools Requtred rrrnrrnnrnnnnnnnnnnvnnnrnnerenernnennn 74 9 2 MEG GT se ee EEE 79 10 Appendix A Host PC Hardware Installation 76 10 1 Installing the High Speed Frame Grabber PCI card 76 10 2 Installing the Ethernet Card essre pute qe siae Gumi o tita bes Son PU Pa S Sie tEs Ead 76 10 3 Installing the Data
11. Boot Record iii Create a DOS partition that is about 10 GB iv Save and exit 4 Reboot the computer with the ROM DOS CD At the command line prompt type FORMAT C to format the disk and label the disk EyeLink if asked 6 At the command line prompt type SYS C to install the ROM DOS system files and make the partition bootable 7 Eject the CD from the CD ROM drive and reboot the computer If all goes well the system should boot from the hard disk and present a ROM DOS command line prompt The next step is to install Windows Vista on the remainder of the hard drive and then to configure the Boot Loader so that Vista will give the option to boot from the ROM DOS partition or Vista when you start your computer We will also copy the Host PC directory and software to the EyeLink partition 8 Reboot the computer from the Vista install DVD 9 Install Vista on the second partition or if no second partition is shown on the remainder of the drive 10 Enter User Names and Passwords as desired and once the Vista installation is complete reboot into the Vista operating system 11 Go to the Start All Programs Accessories gt Cmd exe menu and right click on the Cmd exe icon and select the Run as Administrator contextual menu item Issue the following commands from the command prompt i bcdedit copy legacy d EyeLink This will return a lt GUID gt a string of characters that looks something like IXXXXX
12. Continue on to 2 4 4 EyeLink Response Device Installation Installation and System Cabling 2005 2010 SR Research Ltd 2 42 Fiber Optic Camera System Installation In general the Fiber Optic Camera Head should be powered before the Camera Base Box and the Host PC Should the camera be unresponsive power off the Camera Head and then re power it so that Camera Head is powered before the Camera Base Box 2 4 2 1 Fiber Optic Camera Pre installation Checklist Ensure that you have the following listed components before you start installation 1 EyeLink 1000 Fiber Optic Camera components appear in Figure 2 3 Items ii and iv are only supplied if setting up the fiber optic camera for use with a Desktop Tower Primate or LCD Arm Mount i Camera Base Box ii Camera Adapter for use with Desktop Tower Primate and LCD Arm Mount options iii Camera Head iv Integrated Extension Cable for use with Desktop Tower Primate and LCD Arm Mounts V Fiber Optic Extension Cable Vi Fiber Optic Camera 5V power supply with pressure release connectors alternative power sources include a Battery Pack Power System or BNC connector based power cable Figure 2 3 Fiber Optic Camera Components Installation and System Cabling 2005 2010 SR Research Ltd 2 EyeLink 1000 Mount Each type of Mount consists of an infrared illumination source and an apparatus for holding the EyeLink 1000 camera Each Mount option has a separate chap
13. EyeLink 1000 Software CD Open the Display PC Installation Windows folder 2 3 Run the EyeLinkDevKit exe program by double clicking the icon 4 Follow the instructions from the InstallShield Wizard to install the display software 5 Wait for the InstallShield Wizard to finish and click FINISH to complete installation 9 1 2 Installing the IO Port Access Driver For proper access to IO ports i e for TTL signaling on the Display PC an access driver must be installed Note that this PORT95NT installer doesn t run on any 64 bit versions of Windows XP or Vista 1 To install the driver click Start Programs SR Research EyeLink Utilities gt PORTOSNT Display PC Software Installation 2005 2010 SR Research Ltd 2 Follow the on screen instructions 3 Reboot your computer when prompted 9 1 3 Installing the EyeLink Data Viewer and Experiment Builder Software The EyeLink Data Viewer and Experiment Builder software are optional Windows applications for the EyeLink eye tracker If you did not purchase these options this section may be skipped or you may install the software for evaluation in demo mode l Qu PL PP o a 9 1 4 Insert the EyeLink 1000 Software CD Open the Display PC Installation Windows gt EyeLink Data Viewer folder Run the EyeLinkDV exe program by double clicking the icon Follow the instructions from the InstallShield Wizard to install the softwar
14. If you are running the TRACK EXE program as recommended press C to begin the camera setup calibration and validation steps Refer to the tutorial of Section 3 of the User Manual for more information about performing the calibration and validation under normal behavioral laboratory situations 7 10 Calibration and Drift Correcting with the Long Range System There are a number of operational differences between the EyeLink 1000 between use in the behavioral laboratory and in environments where the Long Range amount is typically installed The first of these issues has to do with configuring custom calibration layouts so that odd shaped spatial areas can be calibrated A second issue has to do with whether and how to employ drift correction in conjunction with the EyeLink 1000 and the Long Range Mount 7 10 1 Calibrating Atypical Spatial Areas 7 10 1 1 Customized Calibration Target Positions Given the confines of an MRI scanner and different screen and head coil configurations the standard calibration of the entire screen area may not always be appropriate For instance if a display projection eliminates the ability of the subject to view the corners of the display e g so that the bottom part of the display can use more of the bore s area to present the stimulus calibration targets presented in the corners will not be viewable by the subject and the standard calibration cannot proceed Similar issues can arise if the head coil blocks part
15. Tower should only be held by the vertical posts and should NEVER be held by the mirror or the components attached to the mirror We recommend you have somebody available to assist with mounting the head support Tower onto the table to prevent damages to the IR mirror or other parts of the Tower Check whether the table is suitable for mounting the EyeLink 1000 Tower the table used should have a minimum thickness of 1 8 cm and a maximum thickness of 8 0 cm Loosen the table clamp by turning the knob counterclockwise then place the table clamp fully onto the table and then tighten it clockwise see right side of Figure 3 2 Check that it is firmly secured by gently attempting to rock the table clamp base free If the table clamp base wobbles you will have to tighten it further Figure 3 2 Clamping Chinrest to Table right Placing and Adjusting Tower Mount The camera mount is quite heavy and cumbersome to move For safety purposes it is recommended that two people participate in setting up this piece of the equipment One person can support the weight of the camera mount while the other lines the spring loaded clamps with holes in the Tower poles When released the clamps secure a peg into the holes of the Tower poles thereby supporting the weight of the camera mount Gently pick up the camera mount with the mirror on the side that is away from you It is recommended that you hold the camera mount near the Tower height adjustment k
16. Translation Analog Card Optional TT 11 Appendix B Windows 2000 XP Host PC Software Installation 78 tll Instal System Commander uae tease dao eo PI o a deep 78 11 2 Resize Existing Disk Partition c cece cece cece eee eeeeeeneeeeeeeeeaeeeeaeees 19 11 3 Create the EyeLink 1000 Host Application partition 81 11 4 Copy the Host Application files to the New Partition 82 11 5 Configuring the Keyboard rnananannnnannannnnannnnanennnnnennenennenennanennnneen 83 11 6 Transfer the System to make the EyeLink Partition Bootable 83 11 7 Organize System Commander s OS Selection Menu 84 11 8 Automated boot into the EyeLink 1000 Operating System 85 12 Appendix C Host PC Software Installation Under Windows Vista 86 12 1 Formatting the Hard Drive under ROM DOS eese 86 2005 2010 SR Research Ltd EN Figures Figure 1 1 Suggested EyeLink 1000 System Layout rrrnrnnnrnnnvnnnennvrnnrrnrenernnvennnenneeneen 2 Figure 2 1 The Standard Camera left and Fiber Optic Camera Base Box and Camera lascio hak ed ah el T Tree 6 Figure 2 2 Host and Display PC Basic Cabling rrrrrrnrennrennrrnnernvennvennrenvrnnernnvennvenneennen 8 Figure 2 3 Fiber Optic Camera Components rrnrennrenvrnnvrnnvrnnrnnnennvenneennrnnernnernnnenneenner 10 Figure 2 4 Came
17. be adjusted up or down by pressing the UP and DOWN arrow keys on either the Host or Display PC keyboards You can also toggle the threshold coloring on and off using the Threshold Coloring button on the Host PC s Camera Setup screen The left side of Figure 7 9 illustrates the boundary of illumination in the global camera view the illuminator would need to be shifted in this case leftwards so that the entire target is illuminated as in the right side of Figure 7 9 Adjust the horizontal and vertical placement of the Illumninator as follows e While monitoring the global camera view adjust the illuminator s tilt up and down by rotating the clip around the Mounting Bar so that the Target Screen is brightly illuminated and the bulk of the illumination appears in the center of the Screen on the vertical tighten the knob holding the illuminator to the Mounting Bar to secure the position The brightly illuminated region will be grayscale while the region in the infrared dark will be threshold colored e By swiveling the illuminator around the thumbscrew adjust the angle of the illuminator on the horizontal plane so that the entire Target Screen is brightly illuminated 7 7 4 Put the Mount into Position and Find the Eye 8 Place the Mount at the intended distance and position For eye tracking purposes the mount should be raised as high as possible in order to maximize the vertical eye tracking range without blocking the subject s v
18. can be run under identical conditions e g tracking the right eye at a particular distance requiring only minor focusing or positioning from subject to subject This section is intended to be a general overview of the steps involved for ANY mount As such it is more general than may be desired for particular installations such as for MEG or MRI Readers interested in a more specific solution for particular MEG or MRI hardware may wish to skip ahead to Section 7 8 for MEG or Section 7 9 for MRI mounts 7 7 1 Acquire Preliminary Measurements The first few steps in setting up the Long Range Camera require knowing the eye to camera distance which is measured from where the lens meets the Camera Head to the bridge of the participant s nose in centimeters This is the length of the entire optical path that light will travel from the camera to the eye While measuring distances also be sure to measure the distance from the eye to the screen top and bottom as well as the length and width of the projected image This time the measurement is in millimeters Use these values to follow Section 8 4 Customizing Your PHYSICAL INI Settings to modify the PHYSICAL INI file settings on your Host PC This is important to ensure correct reporting of information presented in terms of degrees of visual angle 7 7 2 Assemble the Long Range Mount Components 1 Position the Camera Head and Illuminator If there are no obstructions in the line of sight from th
19. coloring turned on switch to the zoomed in thumbnail view of the eye The thumbnail that is selected and transferred to the Display PC can be toggled by pressing the left or right arrow cursor keys on either keyboard Focus the lens The goal is to minimize the size of the corneal reflection resulting a good focus overall Simply turn the barrel of the lens while monitoring the size of the corneal reflection to minimize it If threshold coloring is preventing a clear view of the eye try A for autothreshold to set the thresholds in reasonable range Once the image is in focus press A on the Host or Display PC keyboard to perform an autothreshold or use the mouse to click on the pupil of the eye which will typically perform an autothreshold procedure Autothreshold simply guesses at some appropriate threshold levels to use in determining which parts of the image belong to the pupil and the corneal reflection Pupil threshold levels should be above 60 presented below the thumbnail image otherwise this indicates that the illumination is not good Below a level of about 60 will Long Range Mount Installation 2005 2010 SR Research Ltd produce noisy sample data even if the system is able to track the eye The corneal reflection threshold is rather robust at most threshold settings but typically optimal recordings can be achieved by reducing the threshold slightly to completely fill out the coloring of the corneal reflection
20. handles that are attached to each side of the LCD monitor Facing the back of the monitor grip the handles and guide the shaft of the tilter mechanism into the hole at the top end of the arm Gently wiggle the assembly until the shaft is fully inserted into the arm Some configurations of the LCD Arm may require weights at the end of the table opposite the Arm Base to offset the weight of the LCD Arm apparatus The LCD Arm is fairly heavy with the entire apparatus weighing in at approximately 11 kg or 25 lbs Some possible configurations of the LCD Arm extend the monitor over empty space away from the table s edge placing the weight of the Camera and Monitor Assembly away from the support of the table To prevent tipping the table needs to be large heavy and sturdy or weighted at the end opposite from which the LCD Arm will extend Caution should be used when first testing the range of the LCD Arm in case the table is not strong enough to properly distribute the weight of the apparatus If the table begins to tip while extending the LCD Arm out into space away from the table place the Arm apparatus back above the table surface and add weight e g the Display computer to the table surface opposite where the Arm is extending Repeat this procedure until it is clear that the apparatus is stable LCD Arm Mount Installation 2005 2010 SR Research Ltd 5 4 Mounting the EyeLink 1000 High Speed Camera The EyeLink 1000 LCD Arm Mo
21. in a position where you can easily access the computer s PCI slots IMPORTANT Switch off the computers before installing any PCI cards or connecting or disconnecting any cables Ensure that all cabling is properly connected and connectors are properly secured to the Host PC and the EyeLink 1000 camera before use IMPORTANT Ensure that the power supply setting on the back of the PC Near the power jack matches your local supply voltage IMPORTANT Ensure the computer s power cable is disconnected before opening the computer chassis to install any PCI card WARNING Static Electricity Discharge may cause permanent damages to your system In order to avoid possible static electricity discharge during installation please discharge any static electricity accumulated in your body by touching a grounded metal surface or the computer case for a few seconds IMPORTANT Handle the cards only by their edges 10 1 Installing the High Speed Frame Grabber PCI card Open the EyeLink 1000 Host PC and insert the High Speed Frame Grabber card into a free PCI slot Ensure the card s bracket is firmly attached to the PC ADDO ODO OTTON Figure 10 1 High Speed Frame Grabber 10 2 Installing the Ethernet Card Insert the DLINK DFE 538TX Ethernet Card illustrated into a free PCI slot or the Agere ET131x Gigabit PCIe Ethernet Card into a free PCIe slot Ensure the card s bracket is firmly Appendix A Host PC Hardware Installation 2
22. of the projection screen e g with the Siemens 32 channel head coil or some 8 channel head coils This presents a problem if one is using the default approach of calibrating the entire screen as calibration targets may appear in locations that cannot be viewed by at least one of the eyes some of the time The EyeLink calibration target positions can be customized so even if the area to calibrate is not rectangular targets can be delivered anywhere in an automated fashion Having an observer or two with highly variable head sizes report from in the bore on the monocularly viewable areas of your display with each eye and map out the display coordinates that define the viewable area A set of custom calibration points can be generated for your display region that distributes calibration points throughout the space that can be seen For an example of how to configure such a custom calibration please see the discussion on the SR Research Support Forums https www sr support com forums showthread php t 68 Note that Experiment Builder s Camera Setup node has specialized support for customized calibration target positions and also has a facility for calibrating the eye tracker completely Long Range Mount Installation 2005 2010 SR Research Ltd from within the scanner room if a fiber optic response device is available Please see the Experiment Builder online help for the Camera Setup action paying particular attention to Cu
23. partition for the EyeLink Host software Next Windows Vista will be installed on the unused portion of the drive Finally under Vista we will configure the boot loader so that the system can be booted into either ROM DOS or Windows Vista You will require e a ROM DOS Boot CD supplied with your EyeLink or disk image available via support sr research com e a copy of your EyeLink 1000 CD ROM or EyeLink CL CD ROM containing the Host PC application software and your SCD file supplied with your EyeLink e a copy of your Vista installation disk and Vista License 12 1 Formatting the Hard Drive under ROM DOS The first step in preparing your Host PC for the EyeLink 1000 and Vista is to format your hard drive using the ROM DOS operating system and creating a partition for the EyeLink Host software 1 Boot the computer with the ROM DOS Boot CD If you are using a Dell computer place the CD in the CD ROM drive and press F12 for booting options and boot from the Internal or USB CD ROM drive For other motherboards and systems you may need to enter the BIOS and change the Boot Priority of the different drive components in order to make the CD ROM have the highest boot priority 2 At the command line prompt type FDISK without quotes 3 While running FDISK i type A and delete all partitions Appendix C Host PC Software Installation Under Windows Vista 2005 2010 SR Research Ltd ii type M and write the Master
24. path from illuminator to eye is represented by the heavy broken line The illuminator should be angled to maximize illumination of the eye while minimizing bright spots and shadows on the face For human subjects this may require placing the illuminator to the temporal side of the tracked eye to reduce nose and forehead bright spots and shadows on the temporal side of the eye socket The illuminator is normally located significantly closer to the eye than in the Tower mount typically 180mm from front of illuminator to eye This distance results in an eye illumination level of 1 0 mW cm at the eye which is comfortable for extended viewing with a reasonably sized corneal reflection The EyeLink 1000 illuminator bracket is designed to provide a rigid connection between the illuminator module and the camera This is essential for pupil CR difference tracking mode as any motion of the illuminator relative to the camera will appear as eye rotation artifacts This is also true to a lesser extent for the pupil only eye tracking mode if the CR is positioned within the pupil itself The camera attaches to the bracket with a clamp knob and 3 indexing bumps for positive alignment The camera may also be attached to the bracket so that it is rotated by 180 to change the side of the bracket the lens is on The illuminator block attaches to the bracket with a single clamp knob in a slot allowing the distance from the illuminator to the eye to be changed t
25. perpendicular to the base and screwing the bracket back to the base The bolt must now be turned through the short portion of the L shaped bracket in order to meet and apply pressure to the shim on the underside of the table Some light viscosity oil may make the turning of the bolt go more smoothly but keep in mind that oil will result in discoloration of the paint on the LCD Arm Turn the bolt through without using oil if possible To install the Arm Base use the large supplied L shaped Allen wrench to unscrew the black bolt that has a hexagonal opening in its end It will have to be unscrewed enough to allow the shim perched on its end to fit under the table edge as the shim will eventually be the point of contact between the bottom side of the Arm Base and the underside of the table The large underside of the Arm Base will be the point of contact with the Table s top Place the base in position covering the biggest surface area of the table as possible and with the shim as deeply under the table as possible With the center hole of the shim on top of the bolt begin to tighten the bolt while holding the shim so that it does not fall off of the bolt Pressure will eventually hold the shim in place Tighten as securely as possible p Figure 5 3 Two Configurations of the LCD Arm Mount Base LCD Arm Mount Installation 2005 2010 SR Research Ltd 5 3 Assembling the LCD Arm Components Once the Arm Base has been secured to a sturdy
26. side opposite to the illuminator to prevent the camera image or the illumination to the eye from being blocked Look closely at the eye image on the zoomed view while turning the focusing ring until the eye image is clear If a colored circle CR signal appears near the pupil the best focus will minimize the size of this circle The system is now ready to test Please see the tutorial in the User Manual though you may wish to skim the contents of Chapter 8 first 7 8 Installation in a MEG Room The Long Range EyeLink 1000 is non ferromagnetically optimized made mostly of plastic aluminum and brass The Fiber Optic Camera and Long Range Illuminator minimize electrical noise and attach to the Mounting Bar using brass thumbscrews plastic clips and aluminum brackets All of these features coupled with excellent shielding make the system ideal for a MEG environment The Camera Head Illuminator and Mount are located inside the MEG room with DC power entering the room through a waveguide along with a fiber optic cable or with a rechargeable battery system contained within the room to eliminate the need for cables to enter Typically an AC power supply is located outside the room and plugged into an isolated source as even this inexpensive solution produces low noise The Host PC too is situated outside of the MEG room though the camera images can be transferred and projected into the room via an application running on the Display PC making came
27. the knob of the Screen Mount allows the component holding the Mounting bar to slide up and down The optimal Mounting Bar position from an eye tracking stance is as high in the field of view as possible without blocking the bottom of the display There are two Screen Mount configurations The mounts are available for narrow 37 mm width or wide 75 mm screen frames An optional rubber bumper takes up a further 9 mm of this gap The bottom of the Camera Head and Illuminator are a minimum of 150 mm above where the clamp mounts onto the screen with a maximum height of 395 mm For binocular recording the Screen Mount and hence the Mounting Bar should be centered at the end of the bore For use with head coils that provide visual obstacles when viewed directly from behind e g the 32 channel Siemens head the eye tracker will need to be displaced to the Long Range Mount Installation 2005 2010 SR Research Ltd side of the eye to be tracked Ideally the surface area of the projection screen should be much larger than is required so that even with the Screen Mount attached to the center of the screen the screen can be slid to the side moving the eye monitor off to the side with it while still allowing the entre display projection to land on the screen surface This makes for easy positioning of the eye tracker with the ability to switch between the eye to be tracked monocularly such as with the Siemens 32 channel head coil by simply movin
28. turning the threaded lens into the Camera Head 2 Set the lateral position of the Camera Head and Illuminator on the Mounting Bar Use the ETCD to set the separation between the Camera Head and Illuminator by aligning the edge of the Camera Head and Illuminator clips with the ETCD value marked on the Mounting Bar scales For more details see item number 1 in Section 7 7 2 3 Focus the Illuminator by setting the edge of the Illuminator cover to the ETCD as marked on the scale on the Illuminator s top For more details see item number 4 in Section 7 7 2 4 Align the Iluminator to maximally light where the Camera Head is pointed as detailed in section 7 7 3 While measuring distances also be sure to measure the eye to screen top and bottom as well as the width and height of the projected image This time the measurement is in millimeters Use these values to follow Section 8 4 Customizing Your PHYSICAL INI Settings and to modify the PHYSICAL INI file settings on your Host PC 7 9 5 Align the Camera Head and llluminator Follow the instructions from Section 7 7 3 to align the Camera Head and the Illuminator so that no matter where the camera is pointing it is well lit Having performed the alignment outside of the bore put the eye tracker into position For an alternative approach to aligning the Camera Head and Illuminator with the mount in place see the following section 7 9 6 Puta Volunteer Confederate in the Scanner and
29. use with the EyeLink system Ensure the cable is securely connected at both ends Do NOT connect the crossover cable to the Ethernet port on the Host PC marked LAN WAN which is on the motherboard This port may be used to access the Internet when running Windows 3 Connect one end of the CameraLink Cable provided with your system to the High Speed Frame Grabber card interface on the back of the Host PC Attach the other end of the CameraLink cable to the Camera Base Box for the Fiber Optic Camera Affix the Camera Base Box to the Velcro strips on the rear left side of your Host PC as pictured in Figure 2 4 Ensure both ends of the CameraLink cable are firmly attached with the two thumb screws tightened to lock the cable in place A slotted screwdriver may make this task easier Installation and System Cabling 2005 2010 SR Research Ltd Figure 2 4 Camera Base Box and Cabling affixed to the side of the Host PC 4 Plug the 12V power supply s small circular end into the standard EyeLink Camera Base Box Plug the other end of the power supply into a surge protected power source 5 If you are using the Fiber Optic Camera with the Long Range Mount plug one end of the Fiber Optic Extension Cable into the Fiber Optic receptacle on the Camera Base Box This will be toward the Host PC s front as pictured in Figure 2 4 6 If you are using the Fiber Optic Camera with the Desktop Tower Primate or LCD Arm Mount then locate
30. 005 2010 SR Research Ltd attached to the PC If the analog card option was not purchased with your system you may now close the computer chassis and reconnect the power supply to the computer Figure 10 2 D Link Ethernet Card 10 3 Installing the Data Translation Analog Card Optional If the analog output option was purchased with your system then insert the Data Translation Analog output card into a free PCI slot Ensure the card s bracket is firmly attached to the PC Close the computer chassis and reconnect the power supply to the computer Figure 10 3 Analog Card Appendix A Host PC Hardware Installation 2005 2010 SR Research Ltd 11 Appendix B Windows 2000 XP Host PC Software Installation Please follow the instructions here to install or reinstall the host software IMPORTANT Before proceeding with the EyeLink 1000 Host software installation ensure you have backed up all important data on your Host PC The first step in preparing your Host PC for the EyeLink 1000 is to install the ROM DOS operating system that the EyeLink 1000 system runs on This allows you to perform subject setup monitor performance record data and control experiments running on the Display PC At the same time you will want to keep your existing operating system accessible so that you can access your CDRW drive etc when required To achieve this you will create a FAT32 partition on your hard drive using System Commander that wi
31. 2V Power supply for the EyeLink 1000 Standard Camera CameraLink cable to connect EyeLink 1000 Standard Camera to High Speed Frame Grabber card may be integrated into the LCD Arm Mount Crossover Ethernet cable to connect Host and Display PC together EyeLink Host PC if your system did not come with a preconfigured Host PC or if you wish to replace the Host PC see section 2 3 1 for more information You will also need the following components l Installation and System Cabling 2005 2010 SR Research Ltd A power strip with surge protection to ensure that your EyeLink receives consistent voltage and to make it easy to power the system on and off A Display PC that ideally meets the required specifications These specifications are listed in section 1 3 2 some tools may be needed to adjust your mount or tighten cabling usually a Phillips and or slotted screwdriver will do Display PC EyeLink Host PC 115 230 V 115 230 V Power Supply Power Supply Gaze Ecacking E E Y the Bye kink ll Sera bes 5 Z EESE Ooo O O Ethernet Cable L 0 ER HHH HEH O Pouse HER I HHH Keyboard ft e eria Ke board Hir louse CameraLink Cable FN Parallel Part Button Box EyeLink 1000 Camera VEN or Camera Base Box USB Button Box Figure 2 2 Host and Display PC Basic Cabling 2 4 1 2 Standard Camera System Wiring Standard Camera cabling steps for the Host PC are see Figur
32. CameraLink cable to the top of the EyeLink 1000 high speed camera Connect the EyeLink 1000 power supply that was provided with your system to the power connector on the left side of the EyeLink 1000 camera 1iuminator Cables Camera Power Cable Figure 3 5 Camera and llluminator Cables for a Standard Camera Used in the Tower Mount 3 2 2 Cabling for the Fiber Optic Camera After the Camera Adapter with the Camera Head and lens is mounted onto the Tower connect the two illuminator cables that come out of the left side of the Tower mount to the mini plug sockets on the Integrated Extension cable make sure the cable marked with R is connected to the socket marked with R and the one marked with L to the remaining socket If you haven t already connect the power supply to the Camera Head note one of the pressure release power connectors is unused Connect the fiber optic cable of the Camera Head to the fiber optic connector of the Integrated Extension Cable Now connect the EyeLink 1000 power supply that was provided with your system to the power connector on the Camera Base Box Tower Mount Installation 2005 2010 SR Research Ltd Camera Adapter Integrated Extension Cable L R Illuminator plugs Fiber Optic Cable P Ev power Figure 3 6 Fiber Optic Camera in the Tower Mount 3 3 Adjusting Head Rest Components The height of the forehead and chinrest can be adjusted by loosening the knobs o
33. EyeLink 1000 Installation Guide Tower Desktop LCD Arm Primate and Long Range Mounts Remote 2000 Hz and Fiber Optic Camera Upgrades Version 1 5 2 SR Research 0 EyeLin Copyright 2005 2010 SR Research Ltd EyeLink is a registered trademark of SR Research Ltd Mississauga Ontario Canada Read instructions before use Entela Safety Mark Compliance of this product with UL 60950 314 Edition CSA C22 2 No US 60950 00 CAN CSA is certified by Entela an independent testing body C Certified CLASS 1 LED DEVICE IEC 60825 1 Ed 1 2 2001 CONTACT ADDRESS SR Research Ltd 150 A1 Terence Matthews Crescent Ottawa Ontario Canada K2M 1X4 Fax 613 482 4866 Phone 613 271 8686 Toll Free 1 866 821 0731 Email support sr research com Sales http www sr research com oupport http www sr support com ET 2005 2010 SR Research Ltd Table of Contents 1 DEVELO CUCU 0 PN 1 1 1 Suggested Equipment Layout c ccc ccc cece cence ee EREEREER EE PEE Eri 2 2 Installation and System Cabling cere 4 2 1 pk MNT TETTE TTE TD DO 4 2 2 Display PC Hardware Installation esee 4 2 3 De de Cir te OS P OE EN ne saceacen tesa 5 2o TOMME 5 2 4 Info PEAN inia C 6 2 4 1 Standard Camera System Installation cesses 7 2 4 2 Fiber Opt
34. Figure 7 6 right that are beneath small plastic covers Simply pry the plastic covers free with fingernails to avoid scratching them or the Mounting Bar and use a flathead slotted screwdriver to affix the Mounting Bar If you have plans to use the Tripod Adapter it has a standard inch thread in the bottom Figure 7 6 left for use with standard tripods 7 6 Cabling for Long Range System Fiber Optic Cabling If not already completed connect the Camera Head s fiber optic cable to the supplied fiber optic extension cable The other end of the fiber optic cable goes to the Camera Base Box which should be affixed to the back left side of your Host PC using Velcro Ensure that the 12V EyeLink 1000 power supply is connected to the power connector on the Camera Base Box Long Range Mount Installation 2005 2010 SR Research Ltd Power Cabling There are several possible sources of DC power for the Long Range EyeLink 1000 All sources of power plug into the Camera Head and Illuminator using pressure release LEMO connectors The connectors can be unfastened by squeezing firmly at the very ends of the connectors at the position where raised arrows appear in the rubber covering on either side of the connector Squeeze tightly at these pressure points and firmly pull the connectors apart The power sources are 1 DB 9 Patch Panel Solution An AC power converter that connects via a 9 pin D shaped DB 9 D SUB connector to a separate cabl
35. Find the Eye s To aid in the fine positioning of the camera and illuminator have the Display PC projecting the global image of the camera as you finely adjust the camera and illuminator position by moving the Mounting Bar Be sure it is the global image that is being projected as this will show the entire range of the camera and make it easier to get the camera s field of view to include the eye At this point it will be easiest to have a volunteer in the bore with the head coil and head coil mirror in place as though ready to be scanned The volunteer should be able to report line of Long Range Mount Installation 2005 2010 SR Research Ltd sight to both the Illuminator and the Camera Head when the mirror is tilted at an angle yielding a good view of the entire area where the stimulus is to be displayed Adjust the focus of the lens by turning the lens barrel to roughly focus the lens so that at least what you are looking at is clear Use any landmarks of the head coil such as writing to orient your pointing of the camera having the volunteer make recognizable movements such as winking might help The threshold coloring of the Host computer may assist in finding the eye but keep in mind that if you would rather see the image uncolored you can turn the coloring off and on by toggling the Threshold Coloring button of the Camera Setup screen Adjust the Mounting Bar of the eye tracker to change the Camera Head s view The eye ne
36. Link 1000 mode selected but hardware not operational Use the x option to run in simulation mode Check the power for the Fiber Optic Camera Head and ensure all fiber optic cable connections are secure 8 3 EyeLink Data Storage All EDF files that are created during the recording phase of each experiment will be saved to C ELCL DATA This is the default directory into which EyeLink recording files EDF are stored If the DATA drive cannot be found all EyeLink data files will be saved into the C ELCL EXE directory It is recommended to periodically boot into the Windows operating system to back up your data 8 4 Customizing Your PHYSICAL INI Settings The EyeLink 1000 PHYSICAL INI file at C ELCL EXE directory contains settings that tell the system about physical characteristics of your setup that are important for proper visual angle and eye velocity calculations Any time you change your physical configuration for example a new monitor is used the eye to screen viewing distance is changed etc you should verify that the PHYSICAL INI still accurately reflects your setup The parameters in the PHYSICAL INI file that change depending on the physical setup of your system are screen phys coords specifies the physical distance of the four edges of the presentation surface to the center of the screen The order of these measurements is left top right bottom and are specified in millimeters For the default case of a 19 monitor t
37. The default version of the EyeLink Remote uses the Desktop Mount and an EyeLink 1000 High Speed Camera programmed for Remote viewing Users who are exclusively interested in installing the EyeLink Remote should first follow installation instructions for the Desktop Mount then continue below To use the EyeLink 1000 in remote mode the viewer is ideally about 60 70 cm from the display surface The height of the monitor should be set so that when the participant is seated and looking straight ahead they are looking vertically at the middle to top 75 of the monitor Once you have set up the system make sure you have updated PHYSICAL INI which is located at C EL1000 EXE folder of the Host PC Please follow Section 8 4 Customizing Your PHYSICAL INI Settings to modify the PHYSICAL INI file settings Check whether the camera is set to the Level position the elongation of the camera should be parallel to the table see section 4 1 Mounting the EyeLink 1000 High Speed Camera Place the eye tracker right in front of the monitor the camera screw should be horizontally aligned to the center of the monitor To maximize the eye tracking range the eye tracker should be raised so that the top of the illuminator is as close as possible to the lower edge of the visible part of the monitor without blocking the subject s view Internally the eye tracker software was designed to perform based on this recommended setup Variability by a couple of ce
38. UDNE DID assessed EE TE 42 Figure 7 4 Bracket in the Level Position left and Angled right without the Camera Head top and with the Camera Head bottom eeeeeeeseeeeeeeee 43 Figure 7 5 Illuminator attached using two brass thumbscrews left or single thumbscrew center rotates around the Mounting Bar when its knob is released OAC US GE EE E 43 Figure 7 6 Tripod Adapter left Desktop Base middle and Mounting Bar attached to the Tripod Adapter using Two Brass Bolts right erarennrrnnrrnrrnnrrnnnenernnvrnnernnen 44 Figure 7 7 Male DB 9 connector left to right gender changer with female connector showing BNC connectors LEMO connectors and Battery System 45 Figure 7 8 Focusing the Illuminator esee enne nennen 47 Figure 7 9 Pointing the Camera a visible illumination boundary indicating poor lighting of the left portion of the camera s view left and a fully illuminated target indicating intense and uniform illumination right eeseeesseesessse 49 Figure 7 10 Screen Mount used in conjunction with the Elekta Neuromag screen left and a custom built wood frame screen right ernrennrnnnrnnvrnnvennnenvrnnvrnnvrnnvennvenner 52 Figure 7 11 Tray Mount with optional screen for Siemens family of scanners left Screen Mount middle and Siemens Allegra short bore mount right o3 Figure 7
39. XXXXXXXXXXXX XXXX Select all of the text in the CMD window and copy it to the clipboard by going to the Edit menu and selecting Copy open Notepad in Windows which is a simple text editor located at Start All Programs gt Accessories gt Notepad and paste the text from CMD into the empty document You can now highlight and copy just the lt GUID gt text so that it can be easily pasted in the following steps wherever lt GUID gt appears ii bcdedit set lt GUID gt device partition D iii bcdedit set lt GUID gt path bootsect bak iv bcdedit displayorder lt GUID gt addfirst V bcdedit default guid Appendix C Host PC Software Installation Under Windows Vista 2005 2010 SR Research Ltd 12 Reboot the computer and select Eyelink on the menu to go into the EyeLink partition or select Windows Vista to boot into Vista You can now copy the EyeLink Host Partition files from your EyeLink 1000 or EyeLink CL distribution disk to put the host software on the EyeLink partition See Section 11 4 Copy the Host Application files to the New Partition for instructions 88 Appendix C Host PC Software Installation Under Windows Vista 2005 2010 SR Research Ltd
40. adjust the cover so that it is minimally obscuring the IR illuminator and the camera LCD Arm Mount Installation 2005 2010 SR Research Ltd Figure 5 4 Rearview of the LCD Arm Mount s Camera top and LCD Monitor bottom 5 5 Attaching the Cables Integrated into the LCD Arm Mount is the cabling required for the EyeLink 1000 system and the computer monitor camera and LCD monitor power cables monitor audio cable SVGA video cable and the CameraLink cable After assembling the LCD Arm Mount components inserting the LCD Arm into the Arm Base and attaching the camera all of the cables need to be connected For all cables emerging from the LCD Arm location descriptions assume a view of the Camera and LCD Assembly from the back underside of the monitor see Figure 5 4 bottom Guide the cables to the side of the camera and illuminator support bracket to which the cable will eventually be attached this will prevent the cable from binding against the bracket when the LCD Arm is twisted in various directions Follow these steps 1 First let s deal with cables attached to the high speed camera Figure 5 4 top e If not already connected before affixing the camera connect the CameraLink cable to the interface on the back of the camera that is housed within the Camera and LCD Assembly Tighten the screws by thumb or use a slotted screwdriver to tighten Attaching this cable before attaching the camera to the assembly may be e
41. artition rrerrrrnvrnnvrnnrnnnrnnnrrnvennrenerenernnvennnenner 81 Figure 11 7 Windows Explorer Tools Folder Options Dialog 82 Figure 11 8 Select Partition to Rename ierit cried axsseued eae dura ex Ead d Cua Graiis 84 Figure 11 9 Select Description and ICONS cuiii rius ene orae e R Ri ui taU Putin tala 85 Figure 11 10 Order Add and Remove narennrnnnrnnvennvrnnvenernnvennvennrnnnennvennvennvennnennennnennuenne 85 7 2005 2009 SR Research Ltd 1 Introduction This document provides hardware and software installation instructions for the EyeLink 1000 using the Tower Desktop Primate LCD Arm or Long Range mounts There are two EyeLink 1000 cameras the Standard camera and the Fiber Optic camera and each is compatible with all of the different mount types with the exception that only the Fiber Optic camera works with the Long Range Mount The cameras have identical technical specifications though the Fiber Optic camera has a non ferromagnetic optimized design to operate in electromagnetically sensitive environments such as is required for EEG MEG or MRI Both EyeLink 1000 cameras can be upgraded to enable 2000 Hz recording or to use the EyeLink 1000 as a Remote eye tracker that requires no head stabilization While the 2000 Hz camera upgrade is compatible with all mount options the EyeLink Remote upgrade works with only the Desktop and LCD Arm Mounts For the simplicity of presentati
42. asier for some users e Insert the round EyeLink 1000 power supply cable to the power connector on the right side of the camera e Ensure that the two illuminator cables are plugged into the side of the EyeLink 1000 high speed camera placement is not important These cables are present on the Camera and LCD Assembly and do not emerge from the LCD Arm LCD Arm Mount Installation 2005 2010 SR Research Ltd 2 The remaining cables emerging from the LCD Arm connect to the LCD monitor as follows Figure 5 4 bottom a Insert the phono plug connector into the audio input jack on the bottom centre of the LCD monitor of the Camera and LCD Assembly Connect the SVGA cable to the SVGA input on the right of the LCD monitor Tighten the screws by thumb or use a slotted screwdriver Connect the three prong power cable into the LCD monitor power input on the left side of the monitor Figure 5 5 Cables Emerging from the Bottom of the LCD Arm 3 The following cables coming out of the bottom of the LCD Arm shown left to right in Figure 5 5 are to be connected as described below Extension cables are supplied as indicated in the text above The first cable is the camera high speed data cable and goes to the Host PC the next two cables go to outputs on the Display PC and the final two go to a power source Connect the thick CameraLink cable emerging from the bottom of the LCD Arm to the EyeLink card on the Host PC B
43. b and read distance from the front of the column Measure from the knob to the top of the visible part of the display area then from the knob to the bottom of the display area These two values in millimeters should be your new screen distance command values 8 4 3 Entering Values into PHYSICAL INI The newly acquired values for screen phys coords and screen distance must now be entered into the PHYSICAL INI located on the Host PC This can be done either from the Windows partition or from the EyeLink partition 8 4 3 1 Windows Partition Boot into the Windows partition find the EyeLink drive Go to the ELCL EXE directory and select the PHYSICAL INI file Uncheck the read only property of the file Modify the file and save the change 8 4 3 2 EyeLink Partition Reboot the Host PC into the EyeLink partition Do not press T when in the DOS prompt If the host software is already running closing the host software will automatically bring you to C ELCL EXE directory From the command prompt type the following CD C NELCLNEXE ATTRIB R PHYSICAL INI EDIT PHYSICAL INI Testing the Host PC Installation 2005 2010 SR Research Ltd To enter the new values follow these steps 1 Go to the screen distance parameter 2 Remove the default values for this command 3 Enter new values 4 Repeat steps 1 3 for screen phys coords 5 Save changes and exit the file Finish by typing the following at the comman
44. can be parallel with the top of the Mounting Bar the Level position for monocular recording or it can be rotated 45 degrees the Angled Long Range Mount Installation 2005 2010 SR Research Ltd position for binocular or monocular recording In addition to being tilted up or down the Illuminator can be swiveled around its vertical axis to assist with positioning Several lenses are available for optimal tracking at different eye to camera distances Three lenses 75 50 and 35 mm and a tripod adapter are pictured see Figure 7 1 right The most important step in setting up the mount is to align the illuminator so that it is maximally illuminating the camera s view Doing this alignment ensures that no matter where the camera is pointed it s target will be lit with infrared light as long as there are no obstacles in the way 7 2 Overview of Setting the Mount The most important step in setting up the long range mount is to align the illuminator so that it maximally illuminates the location that the camera is pointing Once this is done the Camera Head and Illuminator are tightened in place and the entire Mounting Bar can be easily positioned using the ball joint on the Mount or the lever of the tripod to which it is affixed Aligning the Camera Head and Illuminator ensures that no matter where the camera is pointed its target will be lit with infrared light without requiring time consuming adjustment of the components Lo
45. ctions using the default settings as prompted Data Viewer is installed in the Applications EyeLink DataViewer directory e Install the USB HASP Key driver for EyeLink Data Viewer Mount the Hdd MacOSX dmg disk image to get access to the HASP driver installer Double click on the installer made available by the disk image and follow the instructions using the default settings as prompted e Configure the network connection to the EyeLink 1000 Host PC Set the IP address to 100 1 1 2 and subnet mask to 255 255 255 0 You can do this by opening the System Preferences Apple menu item then select System Preferences and click on the Network Icon Next go to your computer s Built In Ethernet device select Manually on the Configure pop up menu and enter the above IP address and subnet mask Click Apply to apply these new settings If you plan to program your experiments in MatLab install the latest version of the PsychToolBox and reboot the computer Some demo examples can be found in the Psychtoolbox directory which is in the Applications folder at Applications Psychtoolbox PsychHardware EyelinkToolbox EyelinkDemos GazeContingentD emos Display PC Software Installation 2005 2010 SR Research Ltd 10 Appendix A Host PC Hardware Installation To set up your Host PC for use with the EyeLink 1000 system you will be required to open the computer chassis to install two or three PCI cards Therefore put the computer case
46. d C compilers may be used but you will have to Display PC Software Installation 2005 2010 SR Research Ltd translate the included make files to rebuild the experiments This release of the Windows Display Software does not supply examples for C programming 92 Mac OSX Installation To use Mac OSX as a Display computer with the EyeLink 1000 system various EyeLink software components should be installed on the computer The installation process consists of the following basic steps e Install the Mac OSX Display Software The installer disk image is located in the Display PC Installation Mac OSX folder of the EyeLink 1000 Software CD the latest version of the software can be downloaded from SR Research Support website https www sr support com forums showthread php t 15 Mount and open the disk image under MacOS then click on the installer and follow the instructions using the default settings as prompted The EyeLink libraries documentation and source code examples are installed in the Applications EyeLink folder e Install the EyeLink Data Viewer The installer disk image is located in the Display PC Installation Mac OSX folder of the EyeLink 1000 Software CD the latest version of the software can be downloaded from SR Research Support website https www sr support com forums showthread php t 10 Mount and open the disk image under MacOS then click on the installer and follow the instru
47. d type ATTRIB R PHYSICAL INI Testing the Host PC Installation 2005 2010 SR Research Ltd 9 Display PC Software Installation The Display PC is used to run experiment application software for control of the EyeLink 1000 tracker and stimulus presentation through the EyeLink Display Software This API is available on Windows MacOS and Linux platforms The latest version of the display software can be downloaded from SR Research support website http www sr support com The Display PC installation process should not take more than 15 minutes Installation instructions for the Windows platform are detailed below 9 1 Windows Installation To use a Windows Display computer with the EyeLink 1000 system various EyeLink software components should be installed The installation process consists of the following basic steps e Install the EyeLink Experiment Programming Kit e Install the supplied IO Port Access Driver if planning to use TTL e Install the EyeLink Data Viewer and or Experiment Builder software if purchased e Install the USB Key drivers for EyeLink Data Viewer and or Experiment Builder software if purchased e Configure the network connection to the EyeLink 1000 Host PC 9 1 1 Installing the EyeLink 1000 Experiment Programming Kit The Windows toolkit API and example files is available on the EyeLink 1000 Software CD in the Display PC Installation directory To install the toolkit 1 Insert the
48. d with the Philips Achieva 7 9 3 2 Minimizing Head Coil Mirror Vibration First surface replacement mirrors typically affix to the head coil in an identical way to the manufacturer supplied mirrors It is important that the mirror vibrate as little as possible in order to minimize the vibration of the stimulus display experienced by the subject and to minimize movement of the eye image in the mirror from sources other than the eye itself Sometimes using thick tape where the mirror assembly contacts the head coil can result ina tighter connection between the mirror assembly and the head coil as well as dampening the vibration Alternatively Velcro may help to secure the mirror in position and assist in damping vibration Minimizing vibration of the head coil itself is important as this will in turn reduce vibration of the mirror Long Range Mount Installation 2005 2010 SR Research Ltd 7 9 4 Measuring and Using the Eye to Camera Distance Before putting the eye tracker in position measure the distance between the camera and the head coil mirror as well as the mirror to the eye The sum of these distances is the eye to camera distance ETCD and will be used as discussed in Section 7 7 to 1 Select the lens to use The ETCD is used to select whether to use a 35 mm 50 mm or 75 mm lens These operate at viewing distances of 50 90 cm 90 120 cm and 100 150 cm respectively see Table 2 Affix the appropriate lens to the Camera Head by
49. e Wait for the InstallShield Wizard to finish and click FINISH to complete installation Open the Display PC Installation Windows SR Research Experiment Builder folder Run the SREB exe program by double clicking the icon Follow the instructions from the InstallShield Wizard to install the software Wait for the InstallShield Wizard to finish and click FINISH to complete installation USB License Key Installation If you purchased either the Data Viewer or Experiment Builder software you will have been provided with a USB license key with your order To install the software driver for the USB license key follow these steps L From the Windows Start menu select Start gt All Programs gt SR Research gt Install HASP Driver You may also try running both HASPUserSetup exe and hdd32 exe installers contained in the C Program Files SR Research Common folder of the display computer Follow the instructions from the InstallShield Wizard to install the software Wait for the InstallShield Wizard to finish and click FINISH to complete installation Insert the USB Key into an available USB port on the Display computer The USB key should start to glow red indicating that the key has been recognized by the system 9 1 5 Setting up EyeLink 1000 Network Connection You must have an Ethernet port in your Display Computer Allow Windows to install drivers for it if it is new hardware the
50. e 2 2 1 If not already completed attach the keyboards mouse power cords monitors etc to the Host and Display PCs 2 Connect one end of the Ethernet crossover cable provided with your system to the Ethernet card port on the Host PC marked with an EyeLink Ethernet label Connect the other end of the cable to the Ethernet port on the Display PC that you will later configure for use with the EyeLink system Ensure the cable is securely connected at both ends Do NOT connect the crossover cable to the Ethernet port on the Host PC marked LAN WAN which is on the motherboard This port may be used to access the Internet when running Windows 3 Connect one end of the CameraLink Cable provided with your system to the High speed Frame Grabber card interface on the back of the Host PC Ensure the CameraLink cable Installation and System Cabling 2005 2010 SR Research Ltd is firmly attached with the two thumb screws tightened to lock the cable in place A slotted screwdriver may make this task easier The other end of the CameraLink Cable will be attached to the Standard Camera once it is placed in its Mount 4 Plug the 12V power supply s small circular end into the standard EyeLink 1000 camera Plug the other end of the power supply into a surge protected power source The camera is powered as soon as it has an electrical supply so a power supply with a switch provides a convenient way to turn the camera on and off
51. e Camera Head or Illuminator to the eye to be tracked then the side of the Mounting Bar for these items is not critically important though having the Illuminator on the same side as the tracked eye Camera Head more centrally located may result in better illumination for monocular tracking Decide on the side of the Mounting Bar to place the Camera Head and Illuminator and slip them into position ensuring the cabling for the Camera Head is emerging Long Range Mount Installation 2005 2010 SR Research Ltd 2 3 4 toward the interior of the Mounting Bar The Camera Head may need to be reattached to the Camera Head bracket at a different vertical orientation to ensure the cabling emerges toward the interior thereby protecting it from getting bumped Vertical orientation can be easily changed by removing the Camera Head from its bracket and simply reattaching it to the bracket upside down before tightening it to the Camera Head clip For binocular recording the Camera Head bracket needs to be tightened to the Camera Head clip at a 45 degree angle To angle the Camera Head undo the thumbscrew of the Camera Head Clip and align the holes on the Camera Head Bracket with the guide pins on the bracket see Section 7 3 for detailed steps Determine which lens is most appropriate Based on the eye to camera distance use the Lens Guide Table 2 to determine the most appropriate lens Screw the small end of the lens into the thread
52. e layout of the EyeLink 1000 equipment is important if participant setup is to be convenient and lighting problems are to be avoided Before setting up the equipment check the arrangement of the room to be used against these suggestions These will aid in the ease of acquiring good experimental data e Ideally arrange the Host and Display PC monitors on tables in an L shape as in Figure 1 1 This configuration allows the experimenter to adjust the eye tracking device and set up the subject for the experiment while having access to both computer keyboards and monitors No Windows I Computers Eve tracker ai Avoid Lights No Windows ho Windows Some Windows DK Host a Figure 1 1 Suggested EyeLink 1000 System Layout e Ifyou are using the SR Research chinrest please make sure you have a sturdy table available to clamp the chinrest to This table must have a minimum thickness of 1 8 cm and a maximum thickness of 8 0 cm The bottom edge of the table should have a depth of at least 6 0 cm to mount the integrated table clamp e Ideally the table you select should be deep enough to accommodate both the monitor especially for a CRT monitor and eye tracker For a 21 CRT monitor with a 30 viewing angle the minimum table depth should be about 130 cm A high table will ensure that even the tallest participants do not need to hunch over in order for their view to be aligned with the top of the Dis
53. e sure to tighten the thumbscrew connectors or use a slotted screwdriver to make a tight connection Connect the supplied SVGA extension cable to the SVGA cable coming out of the bottom of the LCD Arm Mount The female end of the cable coming from the LCD Arm attaches to a male connector on the extension The extension s female end attaches to the Display PC video card output port Connect the supplied audio cable extension female end to the 3 5 mm 1 8 mini plug on the audio cable emerging from the bottom of the LCD Arm Insert the male end into the audio output jack on the Display PC Connect the supplied three prong power cable female end to the camera power supply male end that is attached to a cable coming from the bottom of the LCD Arm The male end plugs into a power source Connect the supplied three prong power extension cable to the LCD monitor s power input and plug the male end into a power source The power supply in the LCD Arm Mount Installation 2005 2010 SR Research Ltd monitor is 110 220 Hz so an adapter may be used supplied for countries outside of North America and Japan if the appropriate extension is not included 4 One final cable needs to be attached Connect one end of the Ethernet crossover cable provided with your system to the Ethernet card port on the Host PC make sure it is connected to the EyeLink Ethernet port and not the Ethernet port that is built into the motherboard Connect the other
54. e with pressure release connectors 2 BNC Patch Panel Solution An AC power converter that connects via BNC connectors to a separate cable with pressure release connectors 3 Rechargeable Battery System A Battery Pack power system that is situated near the eye tracker and has a cable with pressure release connectors vf bd Figure 7 7 Male DB 9 connector left to right gender changer with female connector showing BNC connectors LEMO connectors and Battery System The first two power solutions listed above are designed to pass line filtered DC power through a patch panel or filter plate into an RF shielded room such as an MRI room The AC converter is designed to plug into an RF line filter before connecting to the patch panel filter plate The second cable is intended to connect the Camera Head and Illuminator to the patch panel filter plate source inside the room D SUB Patch Panel Solution In the case of the first solution listed above DB 9 connectors see two left images in Figure 7 7 are used on either side of the patch panel filter plate with the assumption that the filter plate connectors are male on one side of the plate and female on the other A DB 9 gender changer is supplied as is an RF noise attenuating filter for use on the power source connected to the filter plate BNC Patch Panel Solution In the case of the second solution listed above the power comes from the AC converter and plugs into a cable with r
55. ead hence central placement of the Illuminator and monocular only recording is necessary For instance if the head coil is blocking the Camera Head s view when it is centrally positioned then moving the Camera Head more laterally may be necessary to acquire an unobstructed view In such cases the eye to be tracked will most likely remain the same across all subjects to prevent having to reconfigure the mount on a subject by subject basis as this can be a more time consuming 5 10 minute procedure After determining which side to place the Camera Head and Illuminator slide these components onto the Mounting Bar but do not yet tighten them into place A second consideration regarding the Camera Head is whether it needs to be level for monocular tracking or angled for binocular tracking See Section 7 3 for detailed steps regarding angling the Camera Head for binocular recording Long Range Mount Installation 2005 2010 SR Research Ltd 7 9 3 The Head Coil Mirror The Head Coil Mirror signal needs to be clear and stable for a good eye tracking signal A first surface mirror with good infrared reflecting properties is desirable The default mirrors provided by head coil manufacturers is typically not a first surface mirror resulting in extra reflections which can interfere with the image of the pupil and CR and typically reduces illumination This reduces the accuracy of the eye tracker SR Research strives to make available good
56. ed Camera Head Check the Camera Head and Illuminator Separation The further away the mount is from the eye the greater the ideal separation of the camera and illuminator On the top of the mount are numerically marked distance scales that indicate the appropriate locations on the Mounting Bar for the inner edges of the Camera Head and Illuminator based on different eye to camera distances measured in cm Loosen the knobs holding the Camera Head and Illuminator Clips to the Mounting Bar adjust the clip positions so the inner edges align with the appropriate distance and then tighten the knobs Focus the Illuminator The illuminator has a lens on it that will focus the infrared light at different distances Without removing the black thumbscrews circled in Figure 7 8 left on the underside of the illuminator loosen them so that the illuminator cover will slide back and forth to reveal an illuminator distance scale Sliding the cover forward will reveal markings on the scale from 60 cm at the closest eye to camera distance to 150 cm at the furthest see sticker in Figure 7 8 right Adjust the cover so that its edge aligns with the marking that approximates your eye to camera distance and then tighten the black thumbscrews Figure 7 8 Focusing the Illuminator Long Range Mount Installation 2005 2010 SR Research Ltd The following steps ensure proper illumination of whatever the camera points at This is done by aiming and secu
57. ed and white color coded BNC lines see third image from the left in Figure 7 7 The BNC connectors attach to the patch panel filter plate BNC terminals and a similar connector attaches to the BNC terminals on the other side of the filter plate inside the shielded room before connecting to the cable leading to the Camera Head and Illuminator It is CRITICAL that the colors of the BNC connectors match on either side of the patch panel filter plate That is if the red color coded connector plugs to a BNC Long Range Mount Installation 2005 2010 SR Research Ltd terminal on one side of the plate it MUST connect to the red coded connector of the cable on the other side of the plate Failing to match these color codes will reverse positive and negative charges and will harm the eye tracker Rechargeable Battery System The third power solution listed above involves a rechargeable battery pack see rightmost image of Figure 7 7 located near the Camera Head and Illuminator A simple cable with pressure release connectors on either end connects the battery output to the Camera Head and Illuminator See the User Manual for detailed battery use and maintenance information 7 7 Long Range Camera Setup Follow these steps to set up the camera and illuminator for Long Range tracking The intent is that these steps should only have to be done once to use the Camera and Illuminator in a given configuration After initial set up multiple subjects
58. ed from above with optional screen left from behind with screen top middle and configured for user supplied screen bottom middle riser block on screen top right and from above bottom right 7 9 1 1 Tray Mount Siemens Full Body Scanners The Tray Mount was designed to be inserted into the end of the bore and to be held in place against the bedrails using nylon bolts at the bottom of the mount The mount pictured in the left side of Figure 7 11 and throughout Figure 7 12 has a post which holds the Mounting Bar on an adjustable ball head The post is attached to the tray s bottom using four nylon bolts and can be flexibly positioned at multiple viewing points in the center of the tray bottom images of Figure 7 12 or off to one side or the other left and top middle images of Figure 7 12 for difficult tracking environments Similarly the height at which the Mounting Bar is positioned can be adjusted and two different length posts are included for added flexibility in the range of heights at which the Mounting Bar can be positioned The Tray Mount has an optional high quality projection screen that is attached at the end of the tray using bolts It also comes in a configuration to hold a screen supplied by the user bottom images of Figure 7 12 For larger bore openings there is a rectangular riser block that raises the screen higher by a couple of centimeters If this is too high for your bore then remove this riser block see top righ
59. eds to be clearly visible in the camera s global view and ideally not too close to the edges of the camera s view If operating in monocular mode be sure only one eye is present in the global image When the system is capable of tracking the eye crosshairs will appear on the pupil and corneal reflection indicating that the system is capable of picking up the eye If the observer can clearly see the infrared points of the illuminator 890 nm the 940 nm Illuminator may be invisible as well as having line of sight down the barrel of the lens then the camera and illuminator are close to the correct position Have the volunteer report on how the camera should be adjusted to achieve their ability in seeing down the camera barrel Note that this is an alternative method to aligning the Camera Head and Illuminator after finding the eye in the center of the global camera image adjust the illuminator angle so that the eye s and its their surround are well lit 7 9 7 Adjust Image Thresholds and Focus the Lens This section assumes some familiarity with the basics of using the EyeLink 1000 For a thorough introduction to a tracking session please consult the tutorial in Section 3 of the EyeLink 1000 User Manual Some of the essential steps are recapped here but for an overview of the procedure and the reasoning behind the different steps please consult the tutorial Once the eye is in view of the camera and the crosshairs are present with threshold
60. end of the Ethernet cable to the Ethernet port on the Display PC that you will later configure for use with the EyeLink system Ensure the cable is securely connected at both ends 5 6 Adjusting the Tension Points on the LCD Arm Occasionally through use of the LCD Arm some of the joints or the hydraulics may require adjustment Each joint can have the tension adjusted so as to require more or less force to INOVE Tension adjustment points are indicated by hexagonal screws on the LCD Arm and can be adjusted using the Allen wrenches supplied Recall that all hexagonal screws on the LCD Arm are in Imperial units Loosening a joint typically turning counterclockwise too much may make it so that it does not stay in the desired position so tighter tension turning clockwise is generally preferred 5 7 LCD Arm Mount Adjustments for Monocular and Remote Recording The EyeLink 1000 LCD Arm Mount can be used for highly accurate monocular recording with head stabilization in which case the LCD Arm Mount is merely an alternative to the desktop or Tower Mount options or in Remote mode without head stabilization In either case the EyeLink 1000 requires that some information about the physical setup be pre configured in an initialization file PHYSICAL INI Regardless of the mode of recording PHYSICAL INI setup for the LCD Arm Mount is identical to the Desktop Mount and is covered in Section 8 4 Customizing Your PHYSICAL INI Settings Keep in m
61. equired to control this Continue to Chapter 8 Testing the Host PC Installation Primate Mount Installation 2005 2010 SR Research Ltd 7 Long Range Mount Installation 7 1 Description of the Components The Long Range Mount consists of a Mounting Bar for the Camera Head and a focusable Long Range Illuminator see Figure 7 1 left In the figure the Camera Head is on the left and the Long Range Illuminator is on the right though these lateral positions are reversible Both the Camera Head and the Long Range Illuminator are affixed to the Mounting Bar using circular clips that tighten onto the bar by turning a knob see Figure 7 2 The Camera Head attaches to the Camera Head clip which can be positioned at either a level or angled orientation while the Long Range Illuminator attaches to an Illuminator Mounting Clip in a flexible manner so that the illumination can be adjusted vertically and horizontally to fit the tracking situation Figure 7 1 EyeLink 1000 Long Range Mount affixed to a Desktop Base left and pictured with a variety of lenses and Tripod Adapter right Illuminator Mounting Clip Guide Pins fl Figure 7 2 Mounting Bar and Clips note Guide Pins on the Camera Head clip left The Mounting Bar can be fixed to a tripod via a Tripod Adapter or one of several specially designed mounts e g the Desktop Base as pictured a Screen Mount MEG MRI or a specially designed MRI mount The camera
62. g Range Mount Installation 2005 2010 SR Research Ltd Figure 7 10 Screen Mount used in conjunction with the Elekta Neuromag screen left and a custom built wood frame screen right 7 9 MhlIinstallation Before beginning installation in an MRI environment please be sure to familiarize yourself with the earlier portions of this chapter This section is essentially duplicating Section 7 7 but with specific mention of the MRI environment and components Installation in MRI settings will vary as different sites often have unique solutions for presenting visual stimuli Placement of the screen the head coil type and other site specific factors must be considered in positioning of the eye tracker The Fiber Optic Camera and Long Range Illuminator are designed to operate at the opening of the bore or even in the bore where appropriate mounts exist Typically it is desirable to position the Mounting Bar with the Camera Head and Illuminator directly below the visual display This will use some potential space at the bottom of the visible display area but both Camera Head and Illuminator need to be visible to the participant Infrared reflecting first surface mirrors on the head coil optimize the eye tracking signal with mirrors for several models of head coil available from SR Research A list of tested configurations appears in Table 3 and Table 4 along with comments about positioning the mount Binocular recording is noted as pos
63. g card was purchased with your system it will require additional cabling steps 2 4 5 1 Analog Card Pre installation Checklist If an analog card option was purchased you should also have 1 Full length PCI Analog card already seated in the Host PC if your system comes preconfigured 2 Analog breakout board with BNC connectors Installation and System Cabling 2005 2010 SR Research Ltd 3 Cable to connect the analog PCI card to the breakout board 2 4 5 2 Analog Card Wiring The analog card allows position information and pupil size to be output as analog voltages The card connects to a breakout board using a thick cable and the breakout board in turn has a number of BNC connectors attached to it Each BNC connector has a label See Table 1 for details of the information carried on each line To reduce noise it is recommended that the breakout board be encased in an RF shielded and insulated box For detailed information regarding configuration and use of the analog card please see Appendix A of the EyeLink 1000 User Manual 2 4 6 Camera Lens Selection The EyeLink 1000 Mounts come with a number of different lenses to be used for unique eye tracking situations Table 2 lists recommended lenses for a range of eye to camera distances as a function of the type of mount being used In all cases eye to camera distance is listed in cm and measured from the surface that the lens screws into on the Standard Camera or the Fibe
64. g the screen The alternative is to loosen the mount holding the eye tracker to the screen and physically move its position beneath the screen 7 9 1 3 Desktop Base all scanner types The Desktop Base is simply a modified version of the Desktop Mount s ball joint base made without ferromagnetic materials It provides a quick and easy way to hold the Mounting Bar in position for fast setup of the eye tracker The drawback is that it may not be as easy to keep in position between subjects as the more specialized mounts that are also fixed in position Though other mounts may be preferable as they are customized to particular scanner environments the Desktop Base is often useful as it can be used in the MRI environment and is very amenable to testing different eye tracking configurations Simply position the Desktop Base with the Mounting Bar attached outside the bore on top of something sturdy with no ferromagnetic content such as a stool or table from within the MRI room For binocular recording the Desktop Base and Mounting Bar should be centered at the end of the bore For use with head coils that provide visual obstacles when viewed directly from behind e g the 32 channel Siemens head the Desktop Base needs to be as far over to the side as possible with the Mounting Bar tilted on an angle so that neither the Camera Head nor Illuminator are blocked by the bore The same principles apply as with the regular mounts if the subject has a c
65. h their installation the reader is directed to consult the web page http www sr research com compatibleHostPCs html for a list of systems known to be compatible and accurate when running the EyeLink hardware and software If your EyeLink 1000 system did not come with a preconfigured Host PC or if you are upgrading or replacing your original Host PC you should have the following additional components on hand These items were supplied with your original EyeLink purchase Please follow Appendix A Host PC Hardware Installation to install these hardware components then continue with the software instructions below 1 Frame Grabber PCI or PCIe card 2 DLINK DFE538 TX Ethernet PCI card or Agere ET131x Gigabit PCIe card 3 Optional Analog card if purchased 4 SR Research EyeLink CL CD Please note that each EyeLink 1000 system requires a camera specific SCD file and therefore you should use the EyeLink 1000 Installation CD that comes with your system 5 ROM DOS Boot CD Depending on the operating system that is to be used on your Host PC s non EyeLink partition you may require the following 1 System Commander Boot CD originally supplied for customers using Windows XP on their Host PCs not required for Vista see Appendix C To install the EyeLink Host software on a computer with Windows XP follow the instructions in Appendix B To install the Host software under Vista follow the instructions in Ap
66. he CD select Partition Commander or Restart and then select Manual Partitioning as illustrated in Figure 11 3 si Partition Wizard How can Partition Wizard assist you More drive space Faster disk access Better organization Add an O5 Figure 11 3 Select Partitioning then Manual Partitioning Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd Figure 11 4 Partition Selection and Resizing 1 From the Partitioning window left side of Figure 11 4 select the disk and the partition to resize In System Commander each disk is represented as a cylinder Within these cylinders are differently colored partitions The partition typically this will be in the primary disk that should be resized to make a new partition will normally be the largest chunk within the selected disk Highlight this partition as illustrated in left and then click on the Resize icon 2 In the New size MB field of the Resize Partition dialog box Figure 11 4 right enter a value that is 5120MB less than the indicated Current Size For example if the original disk size is 76253 MB you should put 71133 MB in the new size field 3 Press Next to do the resizing of the drive System Commander may adjust the partition size you entered slightly This is expected and is not an issue Figure 11 5 Partition and Partition Type Selection Appendix B Windows 2000 XP Hos
67. hich lens to use for the eye to camera distance that you desire In general the larger the lens the greater the magnification and the longer the eye to camera distance that can be used Attach the Camera Head so the fiber optic cable is emerging toward the center of the Mounting Bar The Camera s image orientation can easily be changed in the Host PC application To mount the Camera Head first attach the Camera Head to the Camera Head Bracket as in Figure 7 3 right using supplied brass thumbscrews Next align the holes on the bracket with the pins on the Mounting Bar s Camera Clip in either the Level or Angled position Ideally the Long Range Mount Installation 2005 2010 SR Research Ltd cables should emerge from the side of the Camera Head providing the most protection from them getting bumped or crimped as the fiber optics are the most delicate part of the apparatus Turn the knob on the back of the clip so that it threads into the Bracket As the knob is tightened the Camera Head will become immobile at the position and orientation at which it is being held Figure 7 4 Bracket in the Level Position left and Angled right without the Camera Head top and with the Camera Head bottom Figure 7 5 Illuminator attached using two brass thumbscrews left or single thumbscrew center rotates around the Mounting Bar when its knob is released to adjust tilt right 7 4 Securing the Illuminator There are t
68. his parameter will read screen phys coords 188 0 146 0 188 0 146 0 screen pixel coords specifies the resolution of the display surface Normally the EyeLink 1000 API at the start of an experiment programmatically adjusts this so you do not need to manually change this setting If the EyeLink 1000 programming API or Experiment Builder is not being used then the default value for this parameter will apply The default value reads Testing the Host PC Installation 2005 2010 SR Research Ltd screen pixel coords 0 0 0 0 1024 0 768 0 screen distance specifies the distance to the top and bottom of the display surface from the participant s eye respectively This setting is not applicable to EyeLink remote tracker The default values read as following screen distance 600 660 8 4 1 Measuring screen phys coords All screen physical coordinate measurements are in millimeters It is recommended that a straight ruler be used If your screen is centered in front of the subject a quick method for obtaining the measurements below is to measure the screen width in mm and the screen height in mm and then to divide each of these by two to yield the distances S1 S3 width 2 and S2 S4 height 2 The new settings for the screen phys coords in the PHYSICAL INI file are determined by Screen phys coords S1 S2 S3 S4 In the screen phys coords measure the distance from the center of the dot to the end of the active
69. ic Camera System Installation cesses 10 2 4 3 The Fiber Optic Camera Adapter esses 12 2 4 4 EyeLink Response Device Installation cesses 13 NONSENS 14 240 CNN NNN 15 3 Tower Mount Installation exrnnnrnnnrnnvnnnvnnnvnnvnnnvnnnvnnnnnnnnnnvnnnvnnnnnnnnnnunnnunnnrr 16 3 1 Mounting the Tower to a Table sss ne nemen 17 3 2 Mounting the High speed Camera and Cabling 18 32 1 Cabling or the Standard Camera uusvermvarmaudkumsmrvmm mmsienisjeuui 19 3 2 2 Cabling for the Fiber Optic Camera esses nnns 19 3 9 Adjusting Head Rest Components avvente 20 4 Desktop Mount EyeLink Remote Installation 21 4 1 Mounting the EyeLink 1000 High Speed Camera and Cabling 21 4 1 1 Cabling for the Standard Camera essen 23 4 1 2 Cabling for the Fiber Optic Camera eese esee 23 4 2 Adjusting the Desktop Mount Monocular Binocular and Remote Recording 24 4 3 EyeLink Remote Hardware Adjustment for the Desktop Mount 25 5 LCD Arm Mount Installation eeeeeeeeeeee eren rne 26 5 1 Eno 26 SEP Affixing the Arm Base to a Tabletop rornnrnnnnnonnnnvnannvnannvnennvennnneneene 28 5 3 Assembling the LCD Arm Components esee 29 5 4 Mounting the EyeLink 1000 High Speed Camera
70. iew of the bottom part of the display An unoccluded line of sight from the eye to both illuminator and Camera Head is crucial for optimal eye tracking 9 Check the Orientation of the Camera Image If the camera image is vertically flipped this can be corrected by pressing the button to the right of the global camera Long Range Mount Installation 2005 2010 SR Research Ltd view on the Host PC If the camera image is horizontally flipped this can be corrected by pressing the button on the left to rotate the camera image 180 and then click on the vertical flip button Recommendation Turn USE SEARCH LIMITS off and ONLY have one eye in the camera s view The EyeLink 1000 has the ability to track the eye no matter where it falls in the camera s view This is highly desirable when the eye is difficult to locate i e at long distances and SEARCH LIMITS restricts the area that can automatically track the eye 10 Select the Eye to Track and Adjust Thresholds Press the A key for autothreshold or in the global camera view move the mouse cursor on top of the pupil position and click the left mouse button The camera image for the eye should now be displayed in the zoomed thumbnail view If the pupil is detected a green box and crosshairs will also be drawn Use the left or right cursor key to select the zoomed camera view Adjust the camera focus by turning the focusing ring of the lens You may do the adjustment from the
71. illuminator 3 5 mm 1 8 mini plugs that emerge from the LCD Arm s illuminator male into the sockets emerging from the LCD Arm or from the Integrated Extension Cable female The other end of the fiber optic cable and illuminator mini plugs will plug into the Camera Base Box All EyeLink 1000 Cameras Mount the camera on the LCD assembly On the front of the camera is a threaded hole that the camera screw from the LCD Arm Mount will go into This will secure the camera A knob is attached to the opposite side of the camera screw so that it is easy to turn the screw into the camera hole If there is not enough room for the camera between the monitor and the camera assembly then more space can be gained by moving the assembly further from the monitor Undo the hex bolts holding the bracket with the camera assembly to the monitor and move this forward 1 or 2 sets of holes until there is enough room for the camera to slip in between the monitor and the camera assembly Retighten the hex bolts and then proceed to attach the camera to the LCD assembly Dimples on the camera fit into protrusions on the mount in order to ensure the right positioning of the camera which should be aligned level with the top surface of the part of the mount holding the camera screw Tighten the knob until the camera is secured Next replace the cover by sliding the slots on the cover s bottom around the thumbscrews on the underside of the assembly Tighten the thumbscrews and
72. ind when using the LCD Arm Mount however that for highest accuracy the viewing distance specified in PHYSICAL INI should be used with the LCD Arm Mount even though the LCD Arm may be dynamically adjusted on a per user basis LCD Arm Mount users should proceed to Section 8 Software Installation LCD Arm Mount Installation 2005 2010 SR Research Ltd 5 8 Disassembling and Transporting the LCD Arm Mount The EyeLink 1000 LCD Arm Mount ships with three 60 cm double sided Velcro straps to aid in securing the Arm for lifting and disassembly A recommended method of securing the LCD Arm using the Velcro straps is presented in Figure 5 6 It is recommended that two people participate in this task as the unit can be awkward to handle and does contain some delicate equipment HJT Figure 5 6 Securing the LCD Arm for Disassembling and Transporting The weight of the LCD Arm with the Camera and LCD Assembly approximately 11 kg or 25 Ibs can cause shaft and cup holder points to become tight due to the pressures that the LCD Arm makes while moving the apparatus into various positions Such pressures make what on assembly amounts to merely lowering a shaft into a cup holder not as easily reversed On reversal the pieces need to be gently rocked back and forth to wiggle them free As the LCD Arm is fully loaded this requires the rocking of large portions of the entire unit To minimize the potential for damage as many pieces as possib
73. indow 2 Check the box beside Auto select timeout and set the number of seconds for System Commander to wait before booting the default operating system Indicate the default OS in the Default OS selection If you followed the earlier instruction EyeLink will be the first OS and can be selected by choosing A 3 Once you have completed this step close the windows by clicking the X in the top right corner You will be returned to the main System Commander window and are now ready to test the installation Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd 12 Appendix C Host PC Software Installation Under Windows Vista Please follow the instructions here to install the Host software in conjunction with Windows Vista IMPORTANT Before proceeding with the EyeLink 1000 Host software installation ensure you have backed up all important data on your Host PC A new Windows Vista installation is required and this WILL erase everything on the hard drive We do not have the ability to separately create the Host partition with an already existing Vista installation WARNING ALL DATA ON THE DISK WILL BE ERASED Due to the nature of Windows Vista s boot loader a full installation of Windows Vista must be performed This means that the hard drive will be formatted and any information on the hard drive will be erased We will first format the hard drive using ROM DOS and create a FAT32
74. ion you created above after booting with the ROM DOS Boot Disk Determine this by using the dir command e g dir c for each drive to find the EyeLink drive label and substitute that drive letter c d etc in place of EYELINK DRIVE below It is likely that the drive letter will be either c or d 3 At the command prompt A gt type the following command Sys EYELINK DRIVE ENTER For example if your EyeLink partition is drive c you will enter SyS C and then press the enter key Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd 4 Reboot the computer Once System Commander runs you should see something like the screen pictured in Figure 11 8 with and FAT 32 describing the EyeLink Host partition gt 4 Pp gt B 2 9 QS Wizard Partibioning yew Information Settings Lodang tiske E vs CY 7 Windows XP B eva Boot from CE FAT 32 OS Figure 11 8 Select Partition to Rename 11 7 Organize System Commander s OS Selection Menu 1 When System Commander starts up you will see a screen similar to Figure 11 8 Click on the Settings icon 2 From the Settings window select Descriptions and Icons as illustrated in the left side of Figure 11 9 3 From the screen in the right side of Figure 11 9 click on the arrow buttons of the Current Selection box to select the FAT 32 OS In the EDIT DESCRIPTION box type EyeLink Under SELECT ICONS
75. ith the participant or their chair in order to prevent the subject from introducing any form of vibration to the apparatus 2 Screen Mount A Screen Mount is designed to clamp to the bottom of a screen frame such as that supplied with Elekta Neuromag systems see left side of Figure 7 10 or often used with 4D systems see right side of Figure 7 10 for an example of such a custom built screen The top of the mount has the universal ball joint found on the EyeLink 1000 Desktop Base of Figure 7 1 Eye to camera distance in this configuration is typically greater than 90 cm The Screen Mount typically clamps onto the bottom of a screen frame Mounts are available for narrow 37 mm width or wide 75 mm screen frames An optional rubber bumper takes up a further 9 mm of this gap The bottom of the Camera Head and Illuminator are a minimum of 150 mm above where the clamp mounts onto the screen with a maximum height of 395 mm 3 Tripod The Mounting Bar can be removed and attached to a MEG friendly tripod not supplied using the plastic Tripod Adapter and the tripod placed at the participant s feet in front of or just below a projection screen The tripod is used to adjust the view of the camera by moving the illuminator and camera head together Typical viewing distances for such a setup are 90 cm and will work well with Elekta Neuromag and 4D systems because the screens are rather high in the field of view and far removed from the subject Lon
76. l as the power supply and monitor cables The requirements for the Display PC depend greatly on the type of experimental paradigms for which the EyeLink 1000 will be used For example gaze contingent paradigms generally require more computing power than simple cognitive paradigms because the computer display needs to be updated as quickly as possible Similarly video and audio intensive experiments may need faster hard disks to support the transfer of large video file data to the computer in a timely manner The following requirements are suggestions for a Display PC configuration that Installation and System Cabling 2005 2010 SR Research Ltd should be able to handle most experimental requirements Please contact a SR Research Ltd representative if you have specific questions about your situation and would like our input 2 3 Pentium Core2Duo 2 6 GHz or higher at minimum your processor should support Hyperthreading or have multiple cores 80 GB or larger hard disk with 7 200 or higher rpm 256 MB PCIx video card supporting vertical refresh rates of at least100 Hz for legacy technology AGP 8X or PCI video cards may suffice At least 2 GB RAM more never hurts A DVD ROM writer for software installation and data backup 32 bit Windows XP or Vista preferred or MacOS X 10 2 or higher 17 or larger CRT monitor for valid timing synchronization that supports vertical refresh rates of 100Hz 10 ms frames and horizontal ref
77. le may be removed before attempting to remove the Camera and LCD Assembly from the LCD Arm or the LCD Arm from the Arm Base For instance removing the camera cover and camera is advised Important It is recommended that two people participate in disassembling the LCD Arm Mount Read these instructions through and prepare a place to put the disassembled pieces before attempting disassembly To disassemble the unit one option is to lift the LCD Arm and Assembly together from the Arm Base A second option is to remove the Camera and LCD Assembly from the LCD Arm first and then to remove the LCD Arm itself from the Arm Base In either case double sided Velcro strapping can assist in securing parts of the LCD Arm to make disassembly more manageable Once the LCD Arm has been removed from the Arm Base removal of the Arm Base involves loosening the bolt from applying pressure to the shim until the Arm Base can slide freely off of LCD Arm Mount Installation 2005 2010 SR Research Ltd the table Be careful when handling the shim as it may have sharp edges created around the center hole from the pressure applied to it 5 8 1 Option 1 Remove LCD Arm and Camera Assembly as a Unit First fold the LCD Arm as pictured in Figure 5 6 The Camera and LCD Assembly can be lowered so that the camera bracket is beneath the bottom limb of the LCD Arm Raising it slightly can put pressure on the cable cover which may mark the cover so some
78. lear line of sight to the Illuminator and the Camera Head then tracking is possible 7 9 1 4 Short Bore Mount Siemen s Allegra A special mount has been created for short bore scanners such as the Siemen s Allegra that goes into the bore The Camera Head and Illuminator are seated on the bottom of the bore pointed straight up at a hot mirror The hot mirror reflects infrared light while passing light in the visible spectrum thereby allowing the subject a clear view out the back of the bore The hot mirror reflects the image of the eye from the head coil mirror to the Camera Head while also reflecting the infrared from the Illuminator to light up the eye Given the limited space in the bore there is really only one place for the mount though the Camera Head and Illuminator mounted on a dowel can have their angle adjusted The Allegra Mount supports monocular eye tracking only 7 9 2 Mounting the Camera Head and Illuminator After determining the mount to use it is time to begin assembling the components Based on the mount head coil and whether or not to track binocularly decide which side of the Long Range Mount Installation 2005 2010 SR Research Ltd Mounting Bar to place the Camera Head on and which side to place the Illuminator The general considerations below apply to any mount or MRI eye tracking environment For most purposes placing the Camera Head on the left side of the mounting bar when viewed from behind
79. ll host the ROM DOS OS provided with your EyeLink 1000 system System Commander will also be used to allow you to choose which operating system you wish to launch when you start the Host PC Customer Information Important If you have a floppy disk Please enter your information below d drive create the oystem Commander rescue disks when prompted during User Name installation These may help you recover EyeLink the drive partitions in the future in the Company N ame SR Research Ltd event of file system corruption on the Serial Number drive En i Your System Commander license is EE Resouces Figure 11 1 License Code Entry 11 1 Install System Commander Install the System Commander application that came with your EyeLink 1000 This application allows the user to manage multiple Operating Systems on one computer 1 Boot into Windows as normal Insert the EyeLink 1000 Software CD into your CD drive 2 Access the CD ROM contents by double clicking on My Computer and selecting the CD ROM drive Open the Host PC Installation Utilities folder and run the SystemCommander8 1 1 exe file to install the System Commander software 3 Click the INSTALL button on the opening screen and follow the instructions to install the System Commander software The license number will be on the front of the EyeLink 1000 Software CD case enter it when you see the screen illustrated in Figure 11 1
80. ly seated 8 2 3 EyeLink CL camera not found sometimes the eye tracker will not start and the following EyeLink CL camera not found error will be displayed in the command prompt EyeLink CL camera not found ERROR EyeLink CL mode selected but hardware not operational Use the x option to run in simulation mode This error could be caused by the following possibilities 1 The power to the Standard Camera or Camera Base Box is not powered Please check the power cables and ensure the power light is glowing 2 The camera link data cable is not properly connected to the framegrabber card or to the camera or the connection is loose Try re attaching the cable and using the thumbscrews to fasten the connection 3 The EyeLink 1000 framegrabber card is not fully seated in the card slot Try removing the card and plugging it back to the same slot or a different one 8 2 4 ERROR no sync found The no sync found error is typically caused by a loose data cable connection Try reattaching the cable and using the thumb screws to fasten the connection AQ Start Error Unable to detect frames Testing the Host PC Installation 2005 2010 SR Research Ltd ERROR no sync tound AQ STOP Aborting acquisition 8 2 5 Error No Optilink head found The following error is only seen when a fiber optic camera is used Found Optilink CL base serial number CL1 ERROR No Optilink head found check link or power ERROR Eye
81. m Cabling 2005 2010 SR Research Ltd 2 Place the Camera Head into the Camera Adapter with its two attached cables emerging from the opening on the side of the bracket see the right side of Figure 2 5 3 Replace the crosspiece and fasten the thumbscrews Figure 2 5 The Camera Adapter left with Camera Head inserted right Further instructions regarding the use of the Fiber Optic Camera in various types of mounts appear in later sections describing the installation steps to be taken for each type of mount 2 44 EyeLink Response Device Installation UAR I mA Va be Figure 2 6 VPixx Button Boxes left VPixx Button Box Parallel Port Pin Adapter modified Gravis Destroyer gamepad and Microsoft USB Sidewinder gamepad right If you have purchased an optional button box response device for the Host PC VPixx Professional button box modified Gravis Destroyer Gamepad or the Microsoft USB Sidewinder see Figure 2 6 it should be plugged into the Host PC before booting VPixx Professional Button Box Installation The VPixx button box plugs into the parallel port on the Host PC motherboard and requires the additional parallel port pin adapter shown in the Figure 2 6 Modified Gravis Destroyer Gamepad The modified Gravis Destroyer gamepad plugs into the parallel port on the Host PC motherboard Note that the back two buttons of the Gravis Destroyer gamepad are not operational Microsoft USB Sidewinder Gamepad If
82. mera Viewing from Top Screw Hole Figure 3 4 Views of the EyeLink 1000 Tower and Camera 3 2 Mounting the High speed Camera and Cabling The 25 mm lens should be used on the EyeLink 1000 Tower Mount Remove the cap from the camera lens Remove the protective cover plugged to the Camera Head as well Turn the camera lens into the thread on the Camera Head If the camera handle hits the Camera Adapter for a Fiber Optic Camera use a Philips screw driver to loosen the screw on the camera handle slightly the screw shouldn t come off the handle completely and pull the Tower Mount Installation 2005 2010 SR Research Ltd handle away from the bracket so that the lens is fully screwed into the Camera Head Then retighten the lens handle screw Hold the camera with the lens facing down so that the focusing arm is on the right Align the hole on the camera to the screw on the top of the Tower and tighten the screw knob from below Please make sure the camera lens is not dusty or scratched If you are using the Fiber Optic Camera make sure the fiber optic cable is not twisted or bent 3 2 1 Cabling for the Standard Camera After the camera is mounted onto the Tower connect the two illuminator cables that come out of the left side of the head support Tower to the left side of the EyeLink 1000 high speed camera plug the cable marked with R to the port marked with R and the one with L to the remaining port Connect the
83. mera is mounted onto the Desktop Mount connect the two illuminator cables that come out of the Desktop mount to the left side of the EyeLink 1000 high speed camera Connect the EyeLink 1000 power supply that was provided with your system to the power connector on the left side of the camera see Figure 4 5 Iliuminator Cables amera Power Cable Figure 4 5 Camera and Illuminator Cables from Desktop Mount 4 1 2 Cabling for the Fiber Optic Camera After the Camera Adapter with the Camera Head and lens are mounted onto the Desktop Mount connect the two illuminator plugs emerging from the mount into the 3 5 mm 1 87 mini plug sockets of the Integrated Extension Cable Desktop Mount EyeLink Remote Installation 2005 2010 SR Research Ltd If you haven t already connect the 5V pressure release power supply connectors to the Camera Head note one of the power connectors is unused Connect the fiber optic cable from the Integrated Extension Cable to the Camera Head Now connect the EyeLink 1000 power supply that was provided with your system to the power connector on the Camera Base Box Integrated Extension Cable 2 Illuminator plugs uL Fiber Optic cable 5V power a 2 Figure 4 6 Fiber Optic Camera in the Desktop Mount viewed from the front left and rear right 4 2 Adjusting the Desktop Mount Monocular Binocular and Remote Recording Place the Desktop Mount on the table at a distance between 40 and
84. mera mounts However the hole at the lens end of the camera may not be robust enough to mount the camera with the illuminator bracket attached especially if vibration is present It is recommended that the illuminator bracket be mounted to the head restraint assembly using the 3 holes supplied near the camera mount The long side of the bracket should be oriented away from the subject to maximize head clearance Once the bracket is mounted the illuminator and camera may be attached and re oriented as required The camera may be installed with the lens on the left or right side of the bracket and the illuminator fitted as required to place the connector on the side opposite the camera lens The EyeLink configuration files may be modified to flip the camera image as required to match any mirrors or orientation of the camera While the camera will accept most C mount lenses the performance of most lenses is rather poor in infrared with blurry or dark images resulting from lens coatings or non optimal design The Standard Camera configuration uses a 25 mm focal length lens selected for high resolution and excellent IR performance A similar 16 mm focal length lens is available which will allow the camera to function properly when closer to the eye As with other EyeLink 1000 mounting options the camera requires 12V power and a supplied 60 mm 24 cable is connected from the camera to power the illuminator module A supplied ferrite choke on
85. n both sides of the Tower After sliding the chinrest to the desired position re tighten the knobs e Set up the monitor and chinrest so that the chinrest is centered on the monitor and the monitor is horizontally aligned with the chinrest HINT measure from the left and right knobs on the chinrest to the left and right sides of the top of the display area of the monitor these should be equal e Adjust the tilt of the monitor and height of the forehead rest Ideally these should be set so that the top of the display is at about the same height as the forehead rest and the display is tilted up slightly The tilt can be changed if there are any reflection issues Please follow Section 8 4 Customizing Your PHYSICAL INI Settings to modify the PHYSICAL INI file settings Continue to Chapter 8 Testing the Host PC Installation Tower Mount Installation 2005 2010 SR Research Ltd 4 Desktop Mount EyeLink Remote Installation Please follow the steps below to set up the EyeLink 1000 Desktop Mount Figure 4 1 illustrates adjustable parts of the EyeLink 1000 Desktop Mount using a Standard Camera Camera Screw Illuminator Cable Camera Power High speed Camera L4 ids SG Data Cable Lock Knob Friction Knob Figure 4 1 EyeLink 1000 Desktop Mount Components 41 Mounting the EyeLink 1000 High Speed Camera and Cabling The EyeLink 1000 Desktop and Long Range Mounts can be configured to track eye movements up to
86. n follow these instructions to install and configure the TCP IP network protocol These instructions are based on Windows XP other Windows operating systems may vary slightly Display PC Software Installation 2005 2010 SR Research Ltd 1 From the Start menu select the Control Panel 2 Click on the Network and Internet Connections icon and then select the Network Connections icon Check the list of installed components to make sure a network card is installed If not install a driver for the card 3 Double click on the network card icon that represents the network card that will be connected to the EyeLink 1000 Host PC 4 Select the properties button 5 Check that TCP IP is displayed in the list of components and that it is checked If not press the checkmark beside the option 6 Select the TCP IP component for the Ethernet card connected to the eye tracker PC then click on the Properties button 7 Select the Use the following IP address radio button Enter the IP address of 100 1 1 2 The last digit of the IP address can increase for other computers on the EyeLink network Enter the subnet mask of 255 255 255 0 Leave the default gateway and other settings blank 8 Click on OK to return to the Properties dialog Click OK again to save your changes Click Close to exit from the network card dialog If connectivity error messages appear ensure the supplied Ethernet cro
87. nd a distance of 75 cm from the base in any direction with a minimal extension of 48 cm The desired viewing level of the participant should be combined with the above values when considering the table on which to mount the Arm Base If the participant viewing level is greatly below the tabletop surface then a lower table to mount the Arm Base may be required LCD Arm Mount Installation 2005 2010 SR Research Ltd 5 2 Affixing the Arm Base to a Tabletop There are two different configurations of the Arm Base illustrated in Figure 5 3 On the left of Figure 5 3 is the configuration of the base for a table that can accept the shim at a deep position under its surface This may be required if there is a lip at the table s edge and is the default configuration that the system generally ships with The bolt is fully tightened when the unit is shipped and places pressure against a shiny steel shim that abuts against the underside of the table Be careful while handling the Arm Base s shim as it may have sharp edges around it centermost hole The Arm Base configuration on the right of Figure 5 3 works with tables that have only a narrow ledge on the underside as small as 18 mm accommodating tabletop heights of 60 mm 6cm or 2 3 8 This configuration is created by removing the long bolt that presses against the shim loosening the screw at the bottom of the base reorienting the L shaped bracket so that the short portion is now
88. ndows 2000 XP or Appendix C Host PC Software Installation Under Windows Vista to create the EyeLink partition and install the Host software 8 1 Running the EyeLink Host Program Turn on the Host PC If your system shows the Windows Boot Manager interface select the default EyeLink partition see left side of Figure 8 1 The Host program will start automatically If you see a System Commander OS Selection screen choose the EyeLink partition by clicking on the OS icon see right side of Figure 8 1 You should see a C gt prompt at the command line windows Boot Manager Choose an operating system to start or press TAB to select a tool Use the arrow key a choice han press ENT 5 to highlight your choice then press ENTER OS Wizard Partitioning i Information Settings Locking Help PL ER Bi Microsoft Windows Vista To specify an advanced option for this choice press F8 Seconds until the highlighted choice will be started automatically 27 Auto Select ENTER Choose TAB Menu ESC Cancel Figure 8 1 Booting into the EyeLink Partition If the EyeLink 1000 Host application doesn t start automatically type the following in the command prompt T gu The EyeLink 1000 Host PC application should start and you should see the EyeLink 1000 Host application screen illustrated in Figure 8 2 Please make sure that you are using the latest version of the EyeLink 1000 Host application the latest host software can be d
89. nitor driver CD and instruction booklet and extension cables SVGA audio and power Figure 5 1 Typical EyeLink 1000 LCD Arm Mount Installation 5 1 Choosing a Table Before mounting the LCD Arm and the Camera and LCD Assembly the Arm Base see Figure 5 2 and Figure 5 3 must be affixed to a sturdy table The Arm Base can accommodate tables with a thickness of up to 75 mm 7 5 cm 2 5 at a depth of 18 mm to 65 mm 1 8 65 cm LCD Arm Mount Installation 2005 2010 SR Research Ltd 1 25 The footprint of the Arm Base above the table is 160 mm wide x 140 mm deep 16 cm or 6 4 X 14 cm or 5 and requires further clearance for the LCD Arm to swing in any direction Figure 5 2 EyeLink 1000 LCD Arm Mount Components LCD Arm Mount Base Arm Camera and LCD Assembly The minimum depth for mounting on the table underside with which the system can work is an 18 mm ledge in which case the maximum table thickness is 60 mm 6 cm or 2 3 8 The LCD Arm Mount can displace the Camera and Monitor Assembly from 11 cm below the surface level of the table to which it is mounted to 23 cm above it This places the bottom of the monitor from 2 cm below the table surface to 32 cm above it Two LCD Arm extender units are shipped with the mount that can displace these measurements upwards by a further 6 15 or together 21 cm for a dynamic range of 11 to 44 cm or considering the bottom of the display 2 cm to 53 cm The LCD Arm can exte
90. nobs as shown in the center image of Figure 3 2 Be careful not to scratch or touch the mirror Now line the mount up with the vertical posts and gently lower it into position The camera mounting should rest about inch into the hole Once the Tower Mount is placed onto the Tower poles you will need to adjust its height by simultaneously pulling the Tower height adjustment knobs away from the poles on both the left and right hand sides see right side of Figure 3 2 Be careful as you still have to support the Tower Mount Installation 2005 2010 SR Research Ltd weight of the camera mounting unit Make sure that the unit does not fall down the poles If at any point the camera mounting unit does begin to fall releasing the spring loaded height adjustment will cause them to lock into one set of holes in the Tower poles preventing the Tower from falling further Gently lower or raise the camera mount by pulling to release the height adjustment knobs and by raising or lowering the unit until the knobs are in line with the center of the display monitor see Figure 3 3 This will produce an optimal viewing angle for participants Once the Tower height is set for a normal operation it does not need to be adjusted further The experimenter should adjust the heights of the chair and or chin rest on a participant to participant basis Figure 3 3 Adjust Height of Tower to Half the Screen Area of Monitor Eyelink 1000 Tower Eyelink 1000 Ca
91. ntimeters will not have an impact on the tracker accuracy while a larger deviation from the recommended settings may cause performance issues Contact SR Research for extra setup information if your experiment requires substantial deviation from the above guidelines Continue to Chapter 8 Testing the Host PC Installation Desktop Mount EyeLink Remote Installation 2005 2010 SR Research Ltd 5 LCD Arm Mount Installation Please follow the steps below to set up the EyeLink 1000 LCD Arm Mount Figure 5 1 illustrates a typical LCD Arm Mount setup and Figure 5 2 illustrates parts of the EyeLink 1000 LCD Arm Mount as it ships from SR Research under its standard configuration The mount first requires fixing the Arm Base to a sturdy tabletop assembling the LCD Arm components attaching the EyeLink High Speed Camera and then attaching cables The following instructions detail each of these procedures The contents of the Figure in clockwise direction starting at the top are the Camera and LCD Assembly three Velcro strips rolled and piled cabling emerging from the end of the LCD Arm which runs diagonally throughout the photo the Arm Base two L shaped Imperial Allen wrenches 2 5 and 6 extender tubes the LCD Arm and two angled brackets Not shown in the photo are pieces of the monitor that allow it to be used with a traditional monitor mount should the user ever wish to remove it from the LCD Arm Mount for conventional use the mo
92. o control brightness and CR reflection size and allowing the illuminator to be rotated to maximize illumination The LEDs used in the illuminator were selected for even illumination so angling the illuminator is not critical The illuminator consists of an array of 24 infrared LEDs mounted in a heatsink block The block also allows for a mounting of the assembly via an M8 thread in each side It is important that the illuminator be mounted to a substantial piece of metal to help cool the illuminator as this will enhance light output The IR LEDs emit at 910 nm which was selected for reduced visibility in dark adapted conditions compared to typical 890 nm LEDs The LED array is safe for viewing by humans at any distance it passes the IEC 60825 1 standards by a factor of 3 at any distance However distances of 160mm from the eye resulting in irradiance of 1 2mW cm are recommended for long term viewing comfort Primate Mount Installation 2005 2010 SR Research Ltd The camera either the Standard EyeLink 1000 Camera or the Fiber Optic Camera mounts to the top of the bracket using a clamp knob M8 thread and a set of dimples on its front This ensures that the camera cannot vibrate independently of the illuminator The camera also has o mounting holes on its sides 2 near the center of the camera s sides and 3 aligned with the optical center of the lens and sensor These holes take a standard 1 4 20 screw used on tripod and ca
93. on these eye tracker configurations are collectively referred to as the EyeLink 1000 throughout this document with important exceptions noted where necessary The basic steps in installing the EyeLink 1000 system are 1 Unpack and Install the EyeLink 1000 Hardware 2 If your system did not come with a preconfigured Host PC install necessary Operating System and EyeLink 1000 Host Application software on the Host PC you have acquired 3 Install and configure the EyeLink 1000 Windows Display Software API and example experiments on the Display PC 4 Test the installation If you received a pre configured Host PC with your eye tracker the installation process should take under an hour If you are configuring your own Host PC the installation process will take about two hours Either way budget this amount of time to dedicate to the process If you have questions or encounter a problem during the installation process please contact SR Research through one of the contact channels listed in the contacts section of our website at http www sr research com If you would like to ensure that a technical representative is available for direct phone support during your installation please contact your SR Research representative to book a time for installation phone support Please try to arrange an installation time with at least one week s notice Introduction 2005 2010 SR Research Ltd 1 1 Suggested Equipment Layout Th
94. onocu lar pt wre i penger es mg Jonm lens l Previous Screen Or E n j Stabilized Head Canera Level ILLUM CAM my ey re l Camera Setup hil HI T Tracking ep on Conf igurat ion Pupil Size CUTEM AREA Revert to Last Events and Data Proce Load Defaults Eye Event Data Gaze saccade Sensitivity Video Overlay File Sample Filter Link finatog Filter finalog Output UN IRE Record View Ate Plot Figure 8 3 Host PC Set Options Screen Testing the Host PC Installation 2005 2010 SR Research Ltd 8 2 Troubleshooting Instructions This section lists some of the error messages you may see when starting the host software 8 2 1 SCD file does not exist Each EyeLink 1000 system loads a camera specific SCD file If you see the following error when starting up the tracker please ensure that SCD file is contained in the ELCL EXE directory ERROR Camera data file c ELCL EXE SCD does not exist You can find the camera specific SCD file in the Host Partition V ELCL EXE directory of the EyeLink 1000 Software CD that came with your system If you cannot locate this file please contact support sr research com 8 2 2 No Hardware error The eye tracker reports the current network status between the Host PC and display computer If you see a No Hardware at the top left corner of the Host Program please check whether the Ethernet card is proper
95. op Mount 23 Figure 4 6 Fiber Optic Camera in the Desktop Mount viewed from the front left and 14 550 NN e H H 24 Figure 5 1 Typical EyeLink 1000 LCD Arm Mount Installation 26 Figure 5 2 EyeLink 1000 LCD Arm Mount Components LCD Arm Mount Base Arm Camera and LCD Assembly 5 pex penc dienen Dsaaed vis Geecatesdtaesetapsdastatuasntoansenenguesdnaets 27 Figure 5 3 Two Configurations of the LCD Arm Mount Base eseeeeseeee 28 Figure 5 4 Rearview of the LCD Arm Mount s Camera top and LCD Monitor bottom 31 Figure 5 5 Cables Emerging from the Bottom of the LCD Arm 32 Figure 5 6 Securing the LCD Arm for Disassembling and Transporting 34 Figure 6 1 Typical EyeLink 1000 Primate Mount Installation 36 EN 2005 2009 SR Research Ltd Figure 7 1 EyeLink 1000 Long Range Mount affixed to a Desktop Base left and pictured with a variety of lenses and Tripod Adapter right 40 Figure 7 2 Mounting Bar and Clips note Guide Pins on the Camera Head clip left 40 Figure 7 3 Fiber Optic Camera Head with lens left attached to the Camera Head Bracket center Guide Holes in the Camera Head Bracket accept Guide Pins from Camera Head CH
96. osening the knob on the back of the Illuminator clip allows heading position and tilt of the Illuminator to be adjusted Loosening the knob on the Camera Head clip allows lateral positioning of the Camera Head by sliding it along the Mounting Bar and allows the angle of the Camera Head to be rotated 45 degrees for binocular recording when an illuminated view of both eyes can be acquired The long range mount is designed so that the side of the Illuminator and Camera Head are interchangeable Cables coming from the Camera Head should be directed so they can exit and be securely fastened to avoid being crimped Typically the Camera Head and Illuminator are located at opposite ends of the Mounting Bar and the cables will emerge from the center For monocular recording the typical position for the Illuminator will be on the same side of the Mounting Bar as the eye to be tracked with the Camera Head on the opposite side This ordering may not be necessary but can help in environments where blockage of the illuminator can occur The most important factor in positioning the Camera Head and Illuminator is that there is an unobstructed line of sight from the camera to these components Given these recommendations the configuration in Figure 7 1 depicts the ideal positioning for tracking a participant s right eye left eye if viewed through a mirror as in many MRI setups Long Range Mount Installation 2005 2010 SR Research Ltd 7 3 Securing the E
97. ownloaded from the SR Research support website http www sr support com Testing the Host PC Installation 2005 2010 SR Research Ltd Click on the Set Options button and ensure that the Mouse Simulation button is deselected as in Figure 8 3 the button will not be solid in color Next click on the button marked Setup Cameras and if all is working well you should see that the camera is transmitting images to the Host application A screenshot of the large field of view of the EyeLink 1000 camera Tower Mount is illustrated in Figure 8 2 Please consult Chapter 3 An EyeLink 1000 Tutorial Running an Experiment of the EyeLink 1000 User Manual for tutorials on setting up the camera calibration and validation But first proceed with the Display PC setup in the following chapter Camera Setup TCP IP Link Open Pupil Corneal m TT Screens ja Ja E x i ud 3 Exit Setup MIS 23 Tracking Mode A Pupil CR E S Output Record Set Options Sample Rate EIE J 2x Pupil Tracking Centro ia RUE Image Display Crosshairs Threshold Coloring Calibrate Validate Drift Check IMAGE NOT AVAILABLE ETE Pupil 93 EYE NOT CR 221 AVAILABLE Use Search Limits Mouse Autothresh ERROR Camera Position Left Camera Position Detect Calibration and Validation ELCL Conf iguration Select Conf ig Set Options Link Closed Calibration Type Pacing Interval Screens M
98. packing material may be inserted between these to prevent marking if desired Wrap Velcro soft side against the LCD Arm is recommended around the LCD Arm so that it will not extend when lifted see Figure 5 6 Although full LCD Arm extension is prevented by the camera bracket pressing against the cable cover the possibility exists for body parts to become pinched The entire LCD Arm with intact Monitor Assembly can now be lifted from the Arm Base One person may need to apply downward pressure to the table while the other does the lifting so that the table is not merely lifted off the floor Some wiggling of the LCD Arm and its shaft may be required to make it come free from the Arm Base s holder cup Once free the unit may feel top heavy so be sure to have a strong grip Gently lower the unit onto an awaiting soft foam surface such as the inside of a hard shell case molded for transport and storage of the LCD Arm Mount 5 8 2 Option 2 Remove Camera Assembly then Remove the LCD Arm Fully extend the LCD Arm and ensure there is nothing preventing the upwards lifting of the Camera and LCD Assembly One person will have to steady the LCD Arm and put downwards pressure on the top of the LCD Arm while the other person grabs onto the monitor handles and lifts upwards Some rocking of the Monitor Assembly back and forth to dislodge it may be necessary Once free of the cup holder the Camera and LCD Assembly can be placed on a hard surface wi
99. part of the monitor screen Start on the left side S1 and follow round to the top S2 right S3 and bottom S4 This is illustrated in Figure 8 4 Black or grey non active part of screen Figure 8 4 Measuring screen phys cords Testing the Host PC Installation 2005 2010 SR Research Ltd 8 4 2 Measuring screen distance Please follow the steps below to measure the screen distance values For EyeLink Remote eye tracker keep the default screen distance value 1 Set up the monitor and chinrest so that the chinrest is centered on the monitor and the monitor is horizontally aligned with the chinrest HINT measure from the left and right knobs on the chinrest to the left and right sides of the top of the display area of the monitor these should be equal 2 Adjust the height and tilt of the monitor Ideally this should have the top of the display at about the same height as the forehead rest and the display tilted up slightly The tilt can be changed if there are any reflection issues Small amounts of horizontal misalignment turning of the monitor may be tolerated if required to reduce screen reflections but this may reduce the accuracy of angular measures 3 Now measure from the front of the forehead rest Tower height adjustment knob or the subject s eye position if using your own chin rest to the point on the monitor directly in front of the knob lay the measuring tape across the top of the shaft of the kno
100. pendix C Note that for Vista a clean installation of Vista is required 2 4 Host PC Wiring In all cases connect all cables with the power off and power up the system once all cabling is in place Figure 2 1 The Standard Camera left and Fiber Optic Camera Base Box and Camera Head right Installation and System Cabling 2005 2010 SR Research Ltd The cable connections required depend upon whether you have the EyeLink 1000 Standard Camera or the Fiber Optic Camera The Standard Camera is pictured in the left side of Figure 2 1 while the Fiber Optic Camera components appear in the right side of Figure 2 1 If you have the Standard Camera follow the instructions in the next section entitled Standard Camera System Installation If you have the Fiber Optic Camera then skip to Section 2 4 2 entitled Fiber Optic Camera System Installation 2 4 1 Standard Camera System Installation 2 4 1 1 Standard Camera Pre installation Checklist Ensure that you have the listed components available before you start installation l 2 EyeLink 1000 Standard Camera pictured in the left side of Figure 2 1 EyeLink 1000 Mount Each type of Mount consists of an infrared illumination source and an apparatus for holding the EyeLink 1000 camera Each Mount option has a separate chapter to be consulted regarding its installation Mount types for the Standard Camera include the Desktop Tower LCD Arm and Primate Mounts 1
101. play computer s monitor Introduction 2005 2010 SR Research Ltd e Avoid windows or other bright light sources that could cause reflections on the host and display monitors The grey walls highlighted in Figure 1 1 are locations where bright light sources will cause reflections e Supply sufficient light in the room The best way to light the room is with ceiling mounted fluorescent lights above and no more than two meters behind the computer monitors Painting the walls light colors or white will maximize ambient light as well e Avoid environmental distractions Be sure the room can be kept quiet that no distracting items are viewable by the participant and so on It is a good idea to ensure that the participant cannot see the host monitor without turning their head discourage this e Supply a comfortable stable chair for the participants It should not wobble or move when sat in and the back should be firmly attached to the seat springiness encourages some participants to rock forwards and back A chair with a concave back also discourages shifting of the body as does a high back The top of the chair back should be just below the shoulders on an average participant Finally make sure participants can enter and leave the chair easily as the chair will be close to the table with the Display PC monitor Introduction 2005 2010 SR Research Ltd 2 Installation and System Cabling IMPORTANT 1 Power off compute
102. quality first surface mirrors with the silver reflective coating on the front surface rather than the back surface and with a high infrared transmitting coating for popular MRI systems Use of such a mirror yields an improved image signal and cuts down on the number of extra refraction artifacts that can pollute the camera image If building your own head coil mirror try to ensure that a first surface mirror is used Put the desired mirror on the head coil The goal is to align the illuminator and camera with the mirror so that reflected infrared from the illuminator lights up the eye to be tracked while the mirror reflects the image of the eye back to the camera To achieve this direct line of sight from the camera and illuminator via the head coil mirror is required 7 9 3 1 Replacement First Surface Head Coil Mirrors SR Research is currently working to replace the standard mirrors on popular systems Due to time consuming and labor intensive manufacture of these mirrors we cannot easily custom make mirrors If your site uses a custom mirror that has a wider range of tilt and a larger field of view than manufacturer supplied head coil mirrors you may wish to look into obtaining a front surface mirror with good infrared reflecting properties The only head coil pictured in Table 4 for which SR Research cannot currently supply a front surface replacement mirror is the 8 channel head coil sometimes used with Siemens scanners and frequently use
103. r Optic Camera Head to the bridge of the participant s nose Lens Tower Mount MM ites Broer MonocuariBnocui with Head Remote Mode Binocular onocular Binocular Support 16 mm Short Handle or Small Wheel 9 50 70 cm EE 25 mm Long Handle or Large Wheel 50 70 cm NENNEN 60 70 cm 60 70 cm 100 150 cm Table 2 Lens Guide for Different Viewing Distances Continue on to the section pertaining to the mounting option that you are installing Tower Mount 3 Tower Mount Installation Desktop Mount 4 Desktop Mount Installation LCD Arm Mount 5 LCD Arm Mount Installation Primate Mount 6 Primate Mount Installation Long Range Mount 7 Long Range Mount Installation Installation and System Cabling 2005 2010 SR Research Ltd 3 Tower Mount Installation Please follow the steps below to mount the EyeLink 1000 Tower onto the table and to install the camera Figure 3 1 illustrates adjustable parts on the EyeLink 1000 Tower a Standard Camera is used in this illustration CameraLink Cable Camera Power Cable gu Focusing Arm Selection Knob Forehead Rest ower Height Adjustment Knob Padded Chinrest Chinrest Height Adjustment Knob Chinrest Position Adjustment Knob able Clamp Figure 3 1 Components of EyeLink 1000 Tower Tower Mount Installation 2005 2010 SR Research Ltd 3 1 Mounting the Tower to a Table Important The head support
104. ra Base Box and Cabling affixed to the side of the Host PC 12 Figure 2 5 The Camera Adapter left with Camera Head inserted right 13 Figure 2 6 VPixx Button Boxes left VPixx Button Box Parallel Port Pin Adapter modified Gravis Destroyer gamepad and Microsoft USB Sidewinder gamepad Bae ie erat 13 Figure 3 1 Components of EyeLink 1000 Tower rarenvrnnvrnnvrnnrnnnennvernvennrenernnernnvennnenner 16 Figure 3 2 Clamping Chinrest to Table right Placing and Adjusting Tower Mount17 Figure 3 3 Adjust Height of Tower to Half the Screen Area of Monitor 18 Figure 3 4 Views of the EyeLink 1000 Tower and Camera ennnnnnvnnvrnnvrnnvrnnvnnnennernner 18 Figure 3 5 Camera and Illuminator Cables for a Standard Camera Used in the Tower MOU P c S 19 Figure 3 6 Fiber Optic Camera in the Tower Mount sess 20 Figure 4 1 EyeLink 1000 Desktop Mount Components rrnnvennnnnnvrnernnvrnnvrnnrrnnennnenner 21 Figure 4 2 Desktop Mount Camera Adjustment eese 21 Figure 4 3 Camera Level Position for Remote and Stabilized Monocular Recording22 Figure 4 4 Camera Angled Position for Stabilized Binocular and Monocular Recording 23 Figure 4 5 Camera and Illuminator Cables from Deskt
105. ra setup easily accomplished As the only connection between the room and the Host PC is fiber optic no other isolated power outlets are required Long Range Mount Installation 2005 2010 SR Research Ltd The eye tracker can be easily removed from the MEG room when not in use for either space conservation reasons or to use it in a behavioural lab Apart from requiring a Host PC in the vicinity setup and take down are fast with only minimal adjustment required between subjects Once configured simply place the eye tracker in the room as appropriate when eye tracking is desired plug in its two DC power leads and its single fiber optic lead power up the system and begin recording There are three mounting options that have proven useful for MEG at the current time 1 Desktop Base The Mounting Bar can be attached to a Desktop Base such as in Figure 7 1 To get a good view of the eye the base is typically placed on a shelf bridging the participant s lap This allows the eye tracker to be at about 60 cm from the observer with CTF and Elekta Neuromag MEG systems making for an excellent eye tracking signal Once the mounting position has been determined users may wish to create a wooden pedestal to rest the mount on It is important that the mount be solid as any vibration will degrade eye movement recording and act as a potential noise source For this reason the Desktop Base should never be placed on any construction making contact w
106. resh rates of at least100 kHz Ethernet port to connect Display PC to the EyeLink 1000 Host PC Optional Ethernet card for use on local network a dedicated Ethernet port is ideal to connect to the EyeLink 1000 system A keyboard and mouse or other pointing device Free USB ports if EyeLink Data Viewer SR Research Experiment Builder is purchased Setting up the Host PC Most new acquisitions of the EyeLink 1000 include a preconfigured Host PC requiring simple setup and the attaching of cables Set up the Host PC as you would any computer at the desired location see Section and Figure 1 1 for a suggested layout This includes connecting the keyboard and mouse to the computer as well as the power supply and monitor cables IMPORTANT Please be sure to use the PS 2 keyboard and mouse supplied with your Host PC If your EyeLink 1000 has a preconfigured Host PC continue on to section 2 4 to begin attaching cables 2 3 1 Rebuilding the Host PC The PC that will host the EyeLink hardware and software must meet certain specifications due to the nature of the operating system that the EyeLink Host application runs under As computer technology is rapidly changing only systems tested and approved by SR Research Ltd can be guaranteed to work Installation and System Cabling 2005 2010 SR Research Ltd In the interest of not instructing our customers to purchase computer equipment only to encounter difficulties wit
107. ring the Illuminator so that the halo it produces is in the center of the camera s view Because the Camera Head and Illuminator will move together whatever is viewed will be well lit A Target Screen appears at the end of this chapter Place the Target Screen at the distance of the eye to be tracked It may be easiest to place the Target Screen against a wall and to temporarily move the mount the appropriate viewing distance for the next few steps putting the mount into the final location once the steps are complete 7 7 3 Align the Camera Head and llluminator 5 Check Host Software Configuration Start the EyeLink Host PC application and click Set Options button Check that the Configuration is set to Long Range Mount Monocular or Long Range Mount Monoc Binoc corresponding to how you oriented the Camera Head Level or Angled respectively for monocular and binocular recording Then navigate to the Camera Setup screen The next steps are often more easily accomplished if you have a large view of what the camera is registering The EyeLink 1000 API has the ability to transfer the global view of the camera to the Display PC and all of the demo programs installed with the EyeLink Developer s Kit are capable of achieving this step e g TRACK EXE on Windows or GCWindow app on MacOS After running one of the SR Research demo programs transfer the global camera image For more details on this step novice users may wi
108. rs before connecting or disconnecting any cables Ensure that all cabling is properly connected and connectors are properly secured to the Host PC and the EyeLink 1000 camera before use 2 Ensure that the RED switch on the back of the Host PC power supply near the on off switch matches your country s voltage e g 115 or 230 V 3 Static Electricity Discharge may cause permanent damage to your system In order to avoid possible static electricity discharge during installation please discharge any static electricity accumulated in your body by touching a grounded metal surface or the computer case for a few seconds 2 1 Unpacking Unpack all of the items you have received from SR Research Ltd If the system has been stored or transported at a temperature below 10 C allow all parts to warm to room temperature before proceeding If you are unpacking the EyeLink 1000 Tower Mount please be careful as it contains glass that may have been broken during shipping IMPORTANT The EyeLink 1000 Tower assembly should be held by the vertical posts and should NEVER be held by the mirror or the components attached to the mirror 2 2 Display PC Hardware Installation Set up the Display PC the computer to be used to deliver the experiment to the subject and to control EyeLink 1000 calibration at the desired location see Section and Figure 1 1 for a suggested layout This includes connecting the keyboard and mouse to the computer as wel
109. s of the Host Partition folder you can set Windows to see these files using the following steps i Select the Tools gt Folder Options menu in Windows Explorer ii Select the View tab iii Select the Show hidden files and folders option under Hidden files and folders iv Ensure Hide extensions for known file types is not selected v Uncheck the Hide protected Operating system files as illustrated in Figure 11 7 Folder Options RU 2x General View File Types Offline Files Folder views You can apply the view such as Details or Tiles that you are using for this folder to all folders Apply to All Folders Reset All Folders Advanced settings Display simple folder view in Explorer s Folders list J Display the contents of system folders Display the full path in the address bar I J Display the full path in the title bar J Do not cache thumbnails C3 Hidden files and folders Q Do not show hidden files and folders 9 Show hidden files and folders Hide extensions for known file types Hide protected operating system files Recommended C Launch folder windows in a separate process Managing pairs of Web pages and folders Restore Defaults Figure 11 7 Windows Explorer Tools Folder Options Dialog vi Press OK vii Select all files in the Host Partition folder of the CD Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd
110. sh to consult the tutorial of the EyeLink 1000 User Manual 6 Focus the Camera and Roughly Focus the Lens As humans do not see infrared monitoring the output of the infrared camera is necessary In this step we will shine the Illuminator at a Target Screen or even a wall at the distance where the participant s eye s will eventually be and ensure that the camera s view is centered within the bounds of the illuminated area The Target Screen appears at the end of this chapter Start by placing the mount at the distance of the eye to be tracked from the Target Screen or a wall With a good view of the camera s global image on the Host or Display PC point the Camera Head at the Target Screen s center e g Figure 7 9 While watching the global image turn the lens wheel so that the image becomes clearer it does not have to be perfectly focused at this stage and may look something like either image of Figure 7 9 Long Range Mount Installation 2005 2010 SR Research Ltd Figure 7 9 Pointing the Camera a visible illumination boundary indicating poor lighting of the left portion of the camera s view left and a fully illuminated target indicating intense and uniform illumination right 7 Align the Illuminator and Camera The boundaries of the illumination will show with distinctly different threshold coloring in the illuminated versus non illuminated locations The amount of threshold coloring displayed on the global view can
111. sible because it relies on the ability to view both eyes simultaneously in the angled camera view which may be contingent on the stimulus display the lens required and other site specific physical factors that may vary between installations Long Range Mount Installation 2005 2010 SR Research Ltd Figure 7 11 Tray Mount with optional screen for Siemens family of scanners left Screen Mount middle and Siemens Allegra short bore mount right 7 9 1 Determine the Mount and Configuration to Use The first step in setting up your eye tracker will be determining the mount and head coil to use deciding whether binocular tracking is required or desirable and configuring the Mounting Bar appropriately A number of mounting options and camera positions for different MRI systems head coils and display screen configurations are possible To date the EyeLink 1000 mounts have been installed in at least the scanner configurations listed in Table 3 Other configurations may be possible and other scanners and configurations have been successfully tested These are not listed here as we have not yet designed specialized mounts for them but feel free to inquire about systems not listed Siemens Full Body e g Trio Tray Mount 8 birdcage 12 20 32 channel monocular only Table 3 Some Installed Configurations Long Range Mount Installation 2005 2010 SR Research Ltd Mount Head Coil Mount Positions Tray Mo
112. ssover cable connects the configured Ethernet port of the Disply PC to the supplied network card of the Host PC Alternatively you may need to reinstall the network card drivers To be safe open the Network dialog and remove all components restart Windows then install the network card driver and the TCP IP protocol again To test the network start the EyeLink 1000 tracker and start the Track application from Start Programs SR Research EyeLink Track The link should connect and the screen will display instructions This application allows you to practice participant setup and test the system as described in the EyeLink 1000 Installation Guide If the message Cannot initialize link appears the TCP IP protocol or crossover cable is are not properly configured If the connection times out it is probably due to the network card being improperly configured or because the network cable is not connected to both PCs On the Host PC the Ethernet cable should be connected to the Ethernet card we supplied not to any other Ethernet ports The display of a NO HARDWARE message in the Camera Setup screen indicates that tracker did not reliably detect the Ethernet card If you see this message try re seating the Ethernet card or plugging it to a different slot 9 1 6 System and Programming Tools Required The C experiment templates in Windows Display Software package were developed using Microsoft Visual C 6 0 Other 32 bit C an
113. stomized Calibration Positions and mention of External Control 7 10 1 2 Simple Horizontal or Vertical Scaling of Target Positions A quick and easy to implement approach for simply scaling the horizontal or vertical extent of the calibration area is to use the calibration area proportion and validation area proportion commands to set the proportion of the X and Y display area to use during calibration and validation This can help when less than the entire display is viewable by subjects and is much quicker than redefining all of the calibration positions as it will scale the existing positions Hence this approach is particularly useful when first trying to calibrate the eye tracker in a non standard setting By changing these simple commands X and Y values one can easily shrink the dispersion of the points in the horizontal or vertical dimension respectively The commands as used below shrink to 88 of the X dimension of the display and 53 of the Y dimension of the display simply include these lines in your EYELINK ELCL EXE FINAL INI or send them over the link as EyeLink commands from Experiment Builder or your favorite programming method Note that default values for this command are 0 88 for X and 0 83 for Y calibration area proportion 0 88 0 53 validation area proportion 0 88 0 53 7 10 2 Drift Correction The standard configuration of the EyeLink 1000 for behavioral laboratory use comes with Drift Correction disabled When the E
114. t Camera screw should be held at the top end of the slot IR tlluminatar Camera Angle Adjustmant Camera should be Monocular Camera Orientation parallel to the table zi High Speed Camera Fan Tilt Adjustment Figure 4 3 Camera Level Position for Remote and Stabilized Monocular Recording For binocular tracking see Figure 4 4 1 Place the Desktop Mount on the table Turn the 25 mm camera lens into the thread on the Standard Camera or the Fiber Optic Camera Head See Table 2 for recommended lens usage 2 Move the camera screw to the bottom end of the slot on the Desktop Mount 3 Hold the camera with its elongation forming a 45 degree angle relative to the table Align the hole on the camera to the camera screw on desktop stand and then tighten the camera screw Dimples in the camera align with protrusions on the mount to ensure the camera is in the right position If you are using the Fiber Optic Camera make sure the fiber optic cable is not twisted or bent Desktop Mount EyeLink Remote Installation 2005 2010 SR Research Ltd Camera screw should be placed at the bottom end of the slot IR Hiuminator Camara Angle Adjustment Binocular Camera Orientation Rotate the camera to 45 degree angle High Speed amera Fan Tilt Adjustment Figure 4 4 Camera Angled Position for Stabilized Binocular and Monocular Recording 4 1 1 Cabling for the Standard Camera After the ca
115. t PC Software Installation 2005 2010 SR Research Ltd 11 3 Create the EyeLink 1000 Host Application partition 1 From the Partitioning window select the newly formed Free space highlighted in gray which will appear on the top of the cylindrical drive diagram as illustrated in the left side of Figure 11 5 Click the Create icon which will bring up the Create Partition window 2 Select Primary and click Next which will bring up the Create Primary Partition window as illustrated in the left side of Figure 11 6 In the Volume label field type EYELINK and ensure that the Custom Partition Type box is checked Click Next to bring up the Custom Partition Type window as illustrated in Figure 11 6 right and select FAT 32 then click Next In the following Warning window click Proceed Create Primary Partition Figure 11 6 Create a Custom FAT 32 Partition 3 Close the Partitioning window by selecting the red X in the top right corner of the window and exit System Commander by clicking Start at the bottom left corner of the screen selecting the Exit option Eject the CD before the computer reboots 4 Upon restart the computer will once again run the System Commander application The new EyeLink partition will appear as the icon with two question marks and will be labeled FAT 32 OS as illustrated in Figure 11 8 We will return to deal with
116. t image of Figure 7 12 There are two different lengths of bolts for use with or without the riser block The Tray Mount slides into the end of the bore where its feet rest on the bedrails Four nylon bolts attached to the feet should be turned to put pressure on the bedrails and wedge the mount securely into place Although the Tray Mount was designed to be operated from the end of the bore it is possible to slide it deeper into the bore in the direction of the head coil Deeper positioning will work fine and not introduce problems for MRI imaging however eddy currents Long Range Mount Installation 2005 2010 SR Research Ltd from the magnetic field will introduce greater vibrations in the eye movement recordings For this reason it is recommended to position the Tray Mount at the end of the bore The Tray Mount has a hole cut out beneath the screen so that the operator can reach in to adjust the position of the Mounting Bar and focus the lens It is expected that during Camera Setup and calibration the image from the camera will be projected onto the screen either the optional Tray Mount screen or the screen provided by the user so that the effects of the operator s adjustments can be monitored For binocular recording the post holding the Mounting Bar should be centered as pictured in the bottom right images of Figure 7 12 Use with the Siemen s 32 Channel Head Coil For use with the 32 channel Siemens head coil monocular onl
117. tabletop it is time to insert the LCD Arm into the Arm Base At this point you may wish to add one or both of the Arm Extenders that were included with the system 2 5 and 6 extenders 6 cm and 15 cm as these raise the overall height of the LCD Arm Mount Note that using an extender will also raise the lowest point that the LCD Arm Mount s monitor can reach as they simply displace the entire unit vertically The extender shaft simply fits into the silver cup of the Arm Base or into the cup of another extender Pick up the LCD Arm with one hand on each of the components to minimize its components from swinging The round silver shaft at the bottom of the arm fits into the silver cup at the top of the Arm Base or one of the optional extenders already inserted into the Arm Base simply lower the LCD Arm straight into the cup with cabling off to the side of the base that is closest to the Display or Host PC to which the cabling will eventually be attached Several pieces of double side Velcro ship with the LCD Arm Mount in order to assist users who may wish to wrap the Velcro around the arm components to secure it before lifting This can prevent the arm from swinging while it is being moved The EyeLink 1000 LCD Arm Mount s Camera and LCD Assembly holds an LCD computer monitor the EyeLink 1000 high speed camera in the level position and an infrared illuminator light source These are affixed as a single unit that can be easily lifted using
118. ter to be consulted regarding its installation Mount types for the Fiber Optic Camera include the Desktop Tower LCD Arm Primate and Long Range Mounts 12V Power supply for the EyeLink 1000 Fiber Optic Camera Base Box CameraLink cable to connect Camera Base Box to High Speed Frame Grabber card Crossover Ethernet cable to connect Host and Display PC together Eu XE up Xe EyeLink Host PC if your system did not come with a preconfigured Host PC or if you wish to replace the Host PC see Section 2 2 for more information You will need to supply the following components 1 A power strip with surge protection to ensure that your EyeLink receives consistent voltage and to make it easy to power the system on and off 2 A Display PC that ideally meets the required specifications These specifications are listed in section 1 3 2 3 Some tools may be needed to adjust your mount or tighten cabling usually a Phillips and or slotted flathead screwdriver will do 2 4 2 2 Fiber Optic Camera System Wiring Fiber Optic Camera cabling steps are see Figure 2 2 1 If not already completed attach the keyboards mouse power cords monitors etc to the Host and Display PCs 2 Connect one end of the Ethernet crossover cable provided with your system to the Ethernet card port on the Host PC marked with an EyeLink Ethernet label Connect the other end of the cable to the Ethernet port on the Display PC that you will later configure for
119. th the bracket making contact with the table At this point the LCD Arm can be removed from the Arm Base with one person applying downward pressure on the table while the other person lifts up on and wiggles the LCD Arm free of the Arm Base Continue to Chapter 8 Testing the Host PC Installation LCD Arm Mount Installation 2005 2010 SR Research Ltd 6 Primate Mount Installation The EyeLink 1000 Primate Mount is a metal bracket that contains an illuminator for use with the EyeLink 1000 camera The camera is affixed to the top of the mount pointing downwards and the researcher supplies an apparatus that will reflect a view of the eyes up into the camera barrel while reflecting the infrared illumination onto the face of the subject being tracked see Figure 6 1 Typically this would involve the researcher fixing a hot mirror a piece of glass that reflects infrared light while allowing other wavelengths to pass through it in front of the subject s eyes The subject can thereby see visual stimuli being shown by looking through the hot mirror while the camera has a good view of the eyes Typically the distance between the camera and where the eye would be for monocular recording would be identical to the Tower mount 380 mm While the Primate Mount uses a similar set of metrics to the Tower Mount it is intended to be flexible and ready to install in a wide range of situations where a means of head stabilization exists but the To
120. the Fiber Optic Integrated Extension Cable i Plug the 3 5mm 1 8 mini plugs male or plug ends of the Integrated Extension Cable into the Camera Base Box female or socket ends that should be affixed to the rear left side of the Host PC see Figure 2 4 The mini plugs are marked R and L and should be plugged into the corresponding marked sockets on the Camera Base Box on the rear beneath the power connector ii Plug the fiber optic connector of the Integrated Extension Cable into the Fiber Optic receptacle on the Camera Base Box This will be toward the Host PC s front as pictured in Figure 2 4 iii The other end of the Integrated Extension Cable will be connected to the fiber optic cable of the Camera Head and to the illuminator leads from your mount Detailed instructions for these connections can be found in the descriptions for each type of Mount 2 43 The Fiber Optic Camera Adapter To use the Fiber Optic Camera with the Desktop Tower Primate or LCD Arm Mount the Camera Head needs to be inserted into a Camera Adapter see the left side of Figure 2 5 that makes the Camera Head the same size as the Standard Camera see the right side of Figure 2 5 The Camera Adapter can then be inserted in any type of mount in the place of the Standard Camera Follow these steps to insert the Camera Head into the Camera Adapter 1 Remove the two thumbscrews and crosspiece from the Camera Adapter Installation and Syste
121. this cable must be on the end near the camera Finally a high speed camera cable is connected from the back of the camera to the tracker Host PC To summarize the above points when installing the primate system please keep the following points in mind e The camera should not be too close to the eye as the pupil and corneal reflection must be contained within the tracking window e Bringing the illuminator closer to the eye will reduce noise but may cause discomfort and increase pupil erosion by the corneal reflection e Placing the illuminator too far from the eye will result in a dark image and noisy data e The line from the illuminator to the eye should be at least 10 off axis from the camera lens for proper imaging e The illuminator should be attached to a robust metal support as should the camera Preventing separate motion of the camera and illuminator due to vibration is critical to prevent extraneous noise in the data The metal will also help to keep the illuminator cool increasing its light output Primate Mount Installation 2005 2010 SR Research Ltd e While it is possible to rotate the camera by 90 this will swap X and Y pupil position data Contact SR Research for information about operating in this configuration e tis possible that an extra bright reflection may appear above the pupil in the eye image as the illuminator may directly light the eye as well as through the mirror A small baffle may be r
122. this later For now we wish to boot into Windows once again o Select the Windows XP partition Windows XP should immediately determine that the disk partitioning has changed and perform a number of system tests to validate the hard drive This is expected and should not be interrupted 6 Windows will reboot once its validation checks have been performed From the System commander menu select Windows XP a second time and boot into the Windows operating system Appendix B Windows 2000 XP Host PC Software Installation 2005 2010 SR Research Ltd 11 4 Copy the Host Application files to the New Partition The next required step is to copy the Host PC application files from the supplied EyeLink 1000 Software CD onto the newly created EyeLink partition 1 From Windows start Windows Explorer If you have removed the EyeLink 1000 Software CD from your CD drive reinsert it Navigate to the Host PC Installation Host Partition folder 2 Copy all of the files in this folder to the top level of the newly created EyeLink FAT 32 drive often E The EyeLink CD has copy of all the files required for the Host partition including a required camera specific SCD file Hence the CD is required and it is a good idea to keep the EyeLink 1000 Installation CD in a safe place In some cases Windows may hide certain operating system files i e files ending in INI or BAT If you do not see a BAT file when you view the content
123. unt 8 Channel birdcage Possible End of Bore da af camera centered bore screen E OR Screen Mount OR 8 Channel Siemens Unlikely head End of Bore General Electric or coil top casts Desktop Base camera centered or off to one side Philips models shadow Possible End of Bore camera centered or off to one side 20 Channel Siemens Possible End of Bore 32 channel bottom camera centered or off to one side gt 1 d A p 32 Channel Siemens No End of Bore camera off to one side currently there is no replacement first surface mirror available for this head coil Table 4 Head coils and mount positions The mounts are pictured in Figure 7 11 with the Tray Mount for the Siemens family of scanners on the left configured for use with the 32 channel head coil see also Figure 7 12 left and top The Screen Mount attached to a custom built screen is pictured in the middle image of in Figure 7 11 and the Siemens Allegra short bore mount appears in the rightmost image The Desktop Base is pictured in Figure 7 1 Long Range Mount Installation 2005 2010 SR Research Ltd The next subsections discuss positioning the Camera Head with the different MRI mounts You may consult the section for your particular mount and then continue to Section 7 9 2 to mount the Camera Head and Illuminator onto the Mounting Bar and the Mounting Bar onto the mount Figure 7 12 Tray Mount for Siemens family of scanners pictur
124. unt requires that the EyeLink 1000 Camera be attached It may have already shipped this way or you may have to attach a camera that was part of a different mounting system The Standard EyeLink 1000 Camera To affix the Standard EyeLink 1000 camera first remove the cover that obscures the camera and illuminator from the bottom front of the Camera and LCD Assembly Two thumbscrews on the underside of the assembly hold the cover in place simply loosen the thumbscrews and the cover will slide off in the forward direction Although not essential it may be convenient to attach the CameraLink cable that emerges from the LCD Arm to the back of the camera before attaching the camera This is an opportune point to attach this cable because once the camera is attached there is not a lot of space between the cable interface on the back of the camera and the bracket holding the camera see top of Figure 5 4 The CameraLink cable is a D shaped cable that can only go in one orientation and requires thumbscrews to be tightened to assure a good connection The thumbscrews are also slotted so that a slotted screwdriver can be used to tighten the screws if your thumbs are not strong enough to do the job The Fiber Optic Camera Put the Camera Head into the Camera Adaptor Plug the fiber optic extension cable either a single cable or part of the Integrated Extension Cable into the Camera Head along with the 5V pressure sensitive power connector Plug the
125. wer or Desktop mounts are inappropriate This frequently occurs when research on eye movements is being performed on primates with their head fixed for instance by means of a Primate Chair If the head is fixed extremely solidly pupil only tracking may be possible Otherwise as with the other EyeLink 1000 mounting options Pupil CR mode is recommended Figure 6 1 Typical EyeLink 1000 Primate Mount Installation Primate Mount Installation 2005 2010 SR Research Ltd 6 1 Primate Mount Hardware Considerations As experimental setups using this mount vary widely following something akin to Figure 6 1 is recommended but other configurations are possible The configuration depicted assumes use of the 25 mm lens but other lenses can be used for different viewing distances As with the Tower mount but not with the other systems there is lots of room for movements of the hand in front of the body using the Primate Mount All system and optical components can be seen in the overall rear and side view drawings The optical axis is represented in Figure 6 1 by the thin dotted line The camera is placed above a 45 hot mirror which reflects IR light but is transparent to visible light The reflection of the IR light provides an image of the eye to the camera The subject views the stimulus source such as a computer monitor through the mirror The illuminator module is mounted and angled so as to illuminate the eye via the mirror as well the
126. wo different Long Range Mount Illuminators available for the Long Range EyeLink 1000 The most common illuminator will have infrared peaking at 890 nm At this wavelength Long Range Mount Installation 2005 2010 SR Research Ltd the infrared LEDs may be visible as there is some overlap with the visible spectrum A 940 nm Illuminator is also available that is for most purposes invisible to the subject noticeable perhaps in only fully dark adapted states even when in the darkened scanner environment The tradeoff between these two illuminators lies in the 890 nm light being more instense and therefore more strongly illuminating at greater distances Both illuminators however are sufficient for the 60 150 cm range of the Long Range EyeLink 1000 To secure the illuminator with the power cable leading from the left Secure the Illuminator to its Mounting Clip right side of Figure 7 5 with one or two brass thumbscrews from underneath as pictured in the left side of Figure 7 5 Note there are black thumbscrews holding the illuminator cover on these are not involved in mounting the illuminator but will be used at a later step Figure 7 6 Tripod Adapter left Desktop Base middle and Mounting Bar attached to the Tripod Adapter using Two Brass Bolts right 7 5 Affixing the Mounting Bar The Mounting Bar attaches to a Mount Base e g Desktop Base Screen Mount specialized MRI Mount Tripod Adapter etc using two brass bolts
127. y the post needs to be displaced to the side of the eye to be tracked The mounts in the left image in Figure 7 11 and also Figure 7 12 left and top are all configured for tracking a subject s right eye if used with the 32 channel Siemen s head coil Note that placement of the illuminator is as peripheral as possible and that the Camera Head is as far toward the center of the Mounting Bar as possible This may shift the placement of these components from the recommend positions on the scale but they remain separated and importantly have a more lateral view of the eye through the mask of the head coil It is feasible that both the Illuminator and Camera Head be placed on the same side of the Mounting Bar to make the camera view slightly more peripheral To optimize the eye tracking the subject s head should be elevated as high as possible without touching the mask of the head coil For optimal brain imaging ensure that the head remains centered in the head coil padding one side of the head so it is held more laterally will result in better eye tracking but may produce inferior brain images 7 9 1 2 Screen Mount all scanner types The Screen Mount is designed to clamp to the bottom of a user supplied screen that is situated outside and at the end of the bore Once clamped onto the bottom of the screen frame the height of a ball head holding the Mounting Bar can be adjusted to provide the optimal view of the eye in the head coil mirror Loosening
128. yeLink 1000 Fiber Optic Camera Head The Fiber Optic Camera Head first attaches to a bracket that has several guide holes oriented at a right angle to the camera rightmost image of Figure 7 3 The holes interface with guide pins on the Camera Head Clip pictured at the left of Figure 7 2 The guide pins on the Camera Head Clip slide into guide holes on the Camera Head Bracket to determine the camera orientation When the pins are in the center pair of holes the camera will be horizontally oriented and parallel with the Mounting Bar the Camera Level position When the holes are aligned diagonally with the guide pins the camera will be oriented as required for binocular recording the Camera Angled position Mounting Bracket T Figure 7 3 Fiber Optic Camera Head with lens left attached to the Camera Head Bracket center Guide Holes in the Camera Head Bracket accept Guide Pins from Camera Head Clip right The top part of Figure 7 4 shows the Camera Head Bracket attached to the Mounting Bar without the camera in the horizontal or Level position for monocular recording left and Angled for binocular recording right The bottom of Figure 7 4 shows the Camera Head attached to the bracket and the bracket attached to the Camera Head Clip on the Mounting Bar With the lens cap on to avoid dirtying the lens screw a 35 50 or 75 mm camera lens into the threads on the Camera Head See Table 2 of the current manual for recommendations on w
129. yeLink 1000 is used with the Long Range mount small changes in pupil size or head position can translate to larger absolute inaccuracies given the larger eye to camera distances typically used For this reason enabling drift correction may be desirable with the Long Range mount The EyeLink 1000 User Manual gives detailed information about enabling Drift Correction in several ways Of particular interest for MEG MRI users is online drift correction whereby drift correction can be undertaken while recording is underway Please consult Section 3 11 of the User Manual for Drift Correction options Long Range Mount Installation 2005 2010 SR Research Ltd IEEE EEA bm 2333232222333 gt o 4 23232322323332 A i Long Range Mount Installation 2005 2010 SR Research Ltd 8 Testing the Host PC Installation If your system comes with a standard pre installed Host PC it should already have two partitions installed EyeLink and Windows The EyeLink partition which runs on a DOS operating system is for the operation of the eye tracker This allows you to perform subject setup monitor performance record data and control experiments running on the Display PC The existing Windows operating system is still accessible so that you can update the host software and back up data If you are preparing your own Host PC please follow Appendix B Host PC Software Installation Under Wi
130. you have acquired a USB Microsoft Sidewinder game controller no longer available from Microsoft or SR Research plug it into a USB port on the Installation and System Cabling 2005 2010 SR Research Ltd back of the Host PC as indicated by the label EyeLink Button Box Use an optional USB extender cable if the game pad needs to have a cord longer than one meter NOTE If you have a USB Button Box it must be directly connected to a USB port on the Host PC and cannot be connected through a USB hub Use of an Optional Parallel Port Expansion Card The EyeLink Host PC can be used with an optional Parallel Port Expansion Card from SR Research While the default configuration expects the VPixx Button Box or Modified gravis Destroyer Gamepad to be plugged into the motherboard s parallel port it is possible to use these with the expansion card by copying and renaming the EYELINK Drive ELCLVEXEN BUTTONS EXP file as EYELINK Drive ELCL EXE BUTTONS INI which configures the expansion port as the default BNC Connector Label MES Data Pee oo X DACO fae DAC Binocular Letty lt Left Y Em Binocular Left Binocuar LeftPupllSize Size Monosddbs DAC3 Binocular ee X enes DACA Binocular adie Y Mewes DAC5 L c Right Pupil Size STST Strobe Line SIST Table 1 Analog Card BNC Connector Information 2 45 Analog Card Installation If an optional Data Translation analo

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