A-1 - Newport Corporation
Contents
1. And the host computer runs the GuideStar II software which is full of user friendly and convenient features such as full beam profiles beam position data which can be tracked stored and analyzed An easy set up menu guides new users through the installation Simple settings menus allow complete control of a wide range of camera and beam stabilization parameters including 1000 1 dynamic camera exposure time loop gain to optimize performance of the control loop and complete control of target size and location for each camera Designed for accuracy reliability and ease of use the GuideStar II System is the answer to laser beam drift correction for the most demanding laser applications 2 Safety Precautions 2 1 Definitions and Symbols The following terms and symbols are used in this documentation and appear on the Model 8783 Guidestar ll controller where safety related issues occur A Figure 1 General Warning or Caution Symbol 2 1 1 General Warning or Caution The Exclamation Symbol in the figure above appears on the product and in Warning and Caution tables throughout this document This symbol designates that documentation needs to be consulted to determine the nature of a potential hazard and any actions that have to be taken A Figure 2 Electrical Shock Symbol 2 1 2 Electric Shock The Electrical Shock Symbol in the figure above appears throughout this manual This symbol indicates a hazard arising from dangerous vo2. hardware set up and software operation are found below 11 4 3 Hardware set up 4 3 1 Beam Pick offs and Optical Power The power required for the cameras is low so it is recommend that the leakage through HR mirrors with polished backsides be used as beam pickoffs Other options include reflections off AR surfaces or uncoated beam splitters in the beam The saturation power of the cameras is shown in Figure 3 2a If beam size and exposure time are accounted for this figure can be used to choose appropriate pick offs and attenuation for the beam Fine tuning of power is accomplished via the exposure time so as to maximize dynamic range 1W 1mW 1uW 1nWwW 300 400 500 600 700 800 900 1000 1100 1200 1300 Wavelength nm Figure 9 Approximate saturation power of the cameras with a 10 ms exposure time and a 2 mm beam diameter Exposure time can range from 1 to 980 ms 4 3 2 Optical Layout The physical layout of the two cameras and two motorized mirror mounts may affect the performance of the GuideStar Il System As a general guideline the separation between the mirrors and the separation between the cameras should be large and comparable while the separation between Mirror 2 and Camera 1 should be much shorter as short as conveniently possible see Figure 3 2b Typical values might be 50 cm between mirrors 50 cm between cameras and 10 cm between Mirror 2 and Camera 1 Note that the system can tolerate a wide range of d
3. any specific problems 27
4. is moved an Inner Target and an Outer Target are defined for the sensors When the beam drifts outside of one or both of the Outer Targets it is moved back inside the smaller Inner Target on both sensors Then it is not moved again until it drifts outside of one or both of the Outer Targets Suitable choice of the target sizes can result in relatively infrequent motor activity to maintain beam pointing and position within a user defined range Thus the beam can be left largely unperturbed Dynamic performance of the control loop is determined by several things Two settings in particular allow one to control the dynamic behavior the Loop Gain and Frames to Average Over These provide the flexibility to optimize the loop response The Model 8784 cameras are shipped with an installed lens and neutral density filters The lens provides beam size reduction allowing 1 cm beams to be used with the 5 3 mm sensors The cameras OD 1 2 and 4 filters provide coarse optical attenuation while the exposure time setting of the cameras allows for fine exposure control over a range of roughly 1 1000 ms In addition operation with low lt 500 Hz repetition rate lasers is possible with the Model 8783 T Trigger Kit 4 2 System set up The Quick Start Guide contains information to set up the system Please refer to the quick start guide to install software configure the cameras and connect components with the included cables Additional details on
5. loop performance To close the Motion Settings window click on the OK button 4 4 3 Beam Profiler Tab The second tab is labeled Beam Profiler Under this tab basic beam profiling information is displayed Also available is the Camera Settings button and a Pause button The Full Size button under each image will enlarge the image This can be reversed by hitting Esc on the keyboard The Save Image button allows one to save a JPG image to disk a TA Guide Star i Seam Profiler Pointing Stability Stability Analysis Camera 1 Vv New Focus A Newport Corporation Brand GuideStar IT FPS Color Palette 3 Bicraciene Jam Camera Settings a Center crosshairs m z Centroid Crosshairs O Lineouts Gaussian Fit Camera 1 Camera 2 Beam Diameter mm Beam Diameter mm me E conico M rua EEN eccentricity e nz Gaussian error ve 2 Gaussian error 15 4 Sigma X Diameter mm Y Diameter mm even 4 Sigma 18 4 4 4 Pointing Stability Tab The third tab is labeled Pointing Stability which automatically graphs all of the beam position data being gathered by the cameras You can customize how much data is taken and save it to a TXT file Guide Starii Beam Profiler Pointing Stability Stability Analysis nera 1 Stability Prot 1 New Focus GuideStar IT Closed On Lock Loop Target Motor moving Gp je Cami X Std Dev 0 36 False color table Cami Y Std Dev 0 54 Integration time ms 110
6. movement is measured along the X and Y axes on each camera and this is used to construct the 4x4 Motion Matrix shown below Each element A in the matrix describes the motion resulting from the Motor movement from the m motor i e four motors Picomotor for horizontal motion on first Mirror Mount or MM MM MM MM y along the nth camera axis i e four axes the x axis on Camera 1 or Cam 1x Cam y Cam 2 Cam 3y Movement Matrix A A CAM1X A AA Aia A MM1X A CAM1Y A gt s AoAz3 Aza e A MM1Y A CAM2X A31A32A33A3q A MM2X A CAM2Y AriBa2Pashaa A MM2Y For example the motion along the x axis of Camera 1 due to the x axis Picomotor on Mirror Mount 1 is given by ACam 1 x which is obtained according to A CAM1X Ai A12A13A44 A MM1X A CAM1Y A gt 2 A gt 2Ao2s Aza e 0 A CAM2X A31A32A33 Aza 0 A CAM2Y Agi Ago Arz Aas 0 However this actuation will also move the beam along the y axis of Mirror Mount 1 the x axis of Mirror Mount 2 and the y axis of Mirror Mount 2 A CAM1X A11 AMM1X Maa ie A CAM1X A MM1X oa A CAM1Y A MM1X PENA A CAM2X A MM1X hina 2 A CAM2Y A MM1X 22 6 Frequently Asked Questions Where do need to place the active mirrors and cameras Physically the best position of the Picomotor Mirror Mounts MM and Cameras CAM is such that the beam hits MM1 then MM2 then goes to CAM 1 and then CAM2 The best control is achieved when MM1 and MM2 are separated by gt 30cm and CAM1 and CAM2 are separat
7. 08 284 6808 Support is also available by fax and email Fax 408 980 4300 Email techsupport newfocus com We typically respond to faxes and email within one business day 7 3 Obtaining Service There are no user serviceable parts inside the Model 8783 Guidestar II controller Work performed by persons not authorized by Newport Corporation will void the warranty The GuideStar Il Controller contains no user serviceable parts To obtain information regarding factory service contact New Focus or your New Focus representative Please have the following information available 26 1 Instrument model number on the rear panel 2 Instrument serial number on rear panel or bottom of enclosure 3 Description of the problem If the instrument is to be returned to New Focus you will be given a Return Material Authorization RMA Number which you should reference in your shipping documents Please fill out a copy of the service form located on the following page and have the information ready when contacting Newport Corporation Return the completed service form with the instrument New Focus U S A Office 408 919 1500 FAX 408 980 6083 Name Return Authorization Please obtain RA prior to return of item Company Please obtain RA prior to return of item Address Date Country Phone Number P O Number FAX Number item s Being Returned Model Serial Description Reason for return of goods please list
8. 4 7 Exiting the GuideStar II Application To exit the GuideStar Il application click on the Exit button in the lower right corner Then the GuideStar II window can be closed by either clicking on the close box in the upper right corner of the window or by going to File gt Exit in the upper left corner 20 5 Principles of Operation 5 1 GuideStar ll Algorithm Theory The control algorithm moves each Motor one at a time in accordance to the Lock Equation derived from the Inverse Movement Matrix the difference between the current beam positions and the target beam positions and the gain coefficient Movement Matrix A A CAM1X Ay 1A 12A13A14 A MM1X A CAM1Y Az Az A23Aza A MM1Y A CAM2X Agi As2Ag3Azq A MM2X A CAM2Y Aas AarAasAag A MM2Y A CAM1X A MM1X A CAM1Y A e Ammiy A CAM2X A MM2X A CAM2Y A MM2Y A MM1X A CAM1X AmmiY Al e ACAMIY A MM2X A CAM2X A MM2Y A CAM2Y Above is the equation that would drive the beam all the way to the target in a single step However because of the nonlinearities in the system this leads to oscillation Multiplying by a gain coefficient less than 1 leads to stable iterative convergence to the target in multiple steps A MM1X A CAM1X Ammiy gain Ar e A camy A MM2X A CAM2X A MM2Y A CAM2Y 21 5 2 Acquiring the Motion Matrix During the Motion Matrix acquisition each motor is moved one at a time and in both directions then returned back to where it started The resulting beam
9. 8783 GuideStar II Model 8783 GuideStar II Controller User s Manual V New Focus A Newport Corporation Brand EU Declaration of Conformity We declare that the accompanying product identified with the CE mark complies with requirements of the Electromagnetic Compatibility Directive 2004 108 EC and the Low Voltage Directive 2006 95 EC Model Numbers 8783 C mark affixed 2012 Type of Equipment Electrical equipment for measurement control and laboratory use in industrial locations Manufacturer Newport Corporation 1791 Deere Avenue Irvine CA 92606 Standards Applied e Compliance was demonstrated to the following standards to the extent applicable e BS EN61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirements for use in a controlled electromagnetic environment e This equipment meets the CISPR 11 2009 A1 Class A Group 1 radiated and conducted emission limits e BSEN61010 1 2001 2 Edition Safety requirements for electrical equipment for measurement control and laboratory use Dominique Devidal Quality Director Zone Industrielle 45340 Beaune la Rolande France Warranty New Focus warrants that this product will be free from defects in material and workmanship and will comply with Newport s published specifications at the time of sale for a period of one year from date of shipment If found to be defective during the warranty period the pro
10. Centering Display Radius um NA a Disptacernent um Cam2 X Std Dev 0 80 Cam2 Y Std Dev 5 7 o 9 g J 7 J 0 00 90 00 00 0005 00 00 10 00 00 15 00 0020 9000 25 00 00 30 00 00 35 00 00 40 000045 00 00 50 00 0055 00 01 00 00 0105 0001 10 00 01 15 0001 2 Time mo Pointing Display Radius um 4 4 5 Stability Analysis The fourth tab is labeled Stability Analysis This tab has the individual data plots for X1 Y1 X2 Y2 This is the raw data as well as user defined averaged data and it is controlled by the Start test and Pause buttons on the Pointing Stability Tab This data can be saved to a TXT file using the Save Data button GuideStar 110 Y Guide Stari Beam Profiler Pointing Stability Stability Analysis Averaging Save Data v D Camera 1 X Stab tty Chart 19 4 4 6 Changing Scales on Images and Charts To change the scale of a chart Autoscaling of the X and Y axes can be turned on and off by right clicking on the graph or axis For manual scaling clicking on the maximum or minimum data label on an axis allows one to change its value To change the scale of a camera image Move the mouse pointer over an image to enable the magnifying glass Click to zoom in around the pointer location or shift click to zoom out When zoomed in or out an icon will appear in the upper right corner Clicking this will reset the zoom so that the full sensor area is shown 2 t click to reset the zoom 4
11. ally known to the public or obtainable from public sources 2 readily apparent from the keyboard operations visual display or output reports of the Programs 3 previously in the possession of Customer or subsequently developed or acquired without reliance on the New Focus Programs or 4 approved by New Focus for release without restriction Trademarks The New Focus logo and name are registered trademarks of Newport Corporation in Mexico Israel Singapore European Union Taiwan Hong Kong China Japan Korea Canada Australia and the United States Service Information This section contains information regarding factory service for the source The user should not attempt any maintenance or service of the system or optional equipment beyond the procedures outlined in this manual Any problem that cannot be resolved should be referred to New Focus Technical Support Contacts North America Europe New Focus Newport MICRO CONTROLE S A 3635 Peterson Way Santa Clara CA 95054 Zone Industrielle Telephone 866 683 6287 45340 Beaune la Rolande FRANCE Telephone 408 919 1500 Telephone 33 02 38 40 51 56 Asia Newport Opto Electronics Technologies FE 4th S Apes 2535 B35 32 chu Wia 200131 253 Aidu Road Bld 3 Flr 3 Sec C Shanghai 200131 China Telephone 86 21 5046 2300 Fax 86 21 5046 2323 Newport Corporation Calling Procedure If there are any defects in material or workmanship or a failure to meet specifications p
12. an be repeated at any time To close the window click on the 15 Finished button on the GuideStar Il Auto Configuration tab A pop up window will open in which you can save changes to the System Set up This button will turn off Lock and open the Camera Settings window Camera Settings Camera 1 Camera 2 Exposure time msi Exposure time msi 08 06 04 0 32 i 0 8 06 0 4 Max Value ooo Max Value ooo Telescope Camera Pixel Clack Actual Clock magnification a v Y z 0 5 D Threshold camera FPS Actual FPS 1 0 5 Color Palette ES o Exposure Times should be set so that Max Value for each camera is somewhat less than 255 The sensors saturate at Max Value 255 o Pixel Clock If this is set too high a pixel clock error may occur The default value can be used in most cases o FPS frames per second A lower FPS will slow loop response but will permit longer Exposure Times The default value can be used in most cases o Telescope magnification The default value should be used in most cases This number is used to convert positions on the camera sensors to positions of the incident beam Values of beam position and width reported on all tabs scale with this number The default is the nominal value at the center of the image Distortion is present towards the image edges o Threshold Pixel values below the Threshold will be ignored in centroid calculations This is used to reduce effects
13. ations are subject to change without notice Any change will be reflected in future printings New Focus 3635 Peterson Way Santa Clara CA 95054 USA Part No 90038357 RevA Confidentiality amp Proprietary Rights Reservation of Title The New Focus programs and all materials furnished or produced in connection with them Related Materials contain trade secrets of New Focus and are for use only in the manner expressly permitted New Focus claims and reserves all rights and benefits afforded under law in the Programs provided by New Focus New Focus shall retain full ownership of Intellectual Property Rights in and to all development process align or assembly technologies developed and other derivative work that may be developed by New Focus Customer Shall not challenge or cause any third party to challenge the rights of New Focus Preservation of Secrecy and Confidentiality and Restrictions to Access Customer shall protect the New Focus Programs and Related Materials as trade secrets of New Focus and shall devote its best efforts to ensure that all its personnel protect the New Focus Programs as trade secrets of New Focus Customer shall not at any time disclose New Focus s trade secrets to any other person firm organization or employee that does not need consistent with Customer s right of use hereunder to obtain access to the New Focus Programs and Related Materials These restrictions shall not apply to information 1 gener
14. cseeeee 21 5 1 GuideStar II Algorithm Theory oooooccccnnncnnnnnnnocnnnns 21 5 2 Acquiring the Motion Matrix ccccccccnnnnnocnnnnnnnnnonononinonnnos 22 Frequently Asked Questions 23 Maintenance and ServiCe ce 26 es A Ree 26 12 Technical Suppor eenen a 26 LS Obama SeN Cerine E 26 1 Introduction 1 1 Summary of GuideStar II System The GuideStar II laser stabilization system guarantees critical alignment of complex laser systems by compensating beam pointing and position drift The system is based on Picomotor actuated mirrors which provide high precision control with outstanding intrinsic stability Two miniature cameras provide complete position pointing and profile information while dedicated software implements a user friendly intelligent control algorithm that keeps the beam s four degrees of freedom precisely locked The position data is fed back to the mirror using our patented control algorithm US Patent 7 528 364 Optical Beam Steering and Sampling Apparatus and Method 2009 the only technique that completely corrects the laser beam position in both X and Y and the beam rotation about both X and Y The system is anchored by the small GuideStar Il Model 8783 controller which serves as a USB hub for communication with the cameras and also serves as a multiplexed Picomotor driver to generate drive signals for the four motors The controller connects to the user s host computer via USB
15. duct will either be repaired or replaced at Newport s option To exercise this warranty write or call your local Newport office or representative or contact Newport headquarters in Irvine California You will be given prompt assistance and return instructions Send the product freight prepaid to the indicated service facility Repairs will be made and the instrument returned freight prepaid Repaired products are warranted for the remainder of the original warranty period or 90 days whichever first occurs Limitation of Warranty The above warranties do not apply to products which have been repaired or modified without Newport s written approval or products subjected to unusual physical thermal or electrical stress improper installation misuse abuse accident or negligence in use storage transportation or handling This warranty also does not apply to fuses batteries or damage from battery leakage THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE NEW FOCUS SHALL NOT BE LIABLE FOR ANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS First printing 2012 2012 by New Focus Santa Clara CA All rights reserved No part of this manual may be reproduced or copied without the prior written approval of New Focus This manual has been provided for information only and product specific
16. ed by as much as possible We therefore advise setting up MM1 close to the beam origin CAM1 directly following MM2 somewhere in the middle and CAM2 close to the beam destination Laser Input e aoso APESTA y y 1920 x 1080 resolution CONTROLLER MODE 8783 z V New Hocus a Laser Output We think the ideal setup is to spread things out as much as possible Having the maximum separation the optical train allows between the 2 mirrors and then also between the 2 cameras should give the most control and resolution better 60cm minimum distance between the 2 mirrors and then the 2 sensors will achieve better than 10 urad resolution It may also be useful to have the last camera image the actual working plane of the set up so the system stabilizes exactly on what really matters How do get a low power beam into the camera The power required to saturate the camera is generally very low so we provide ND 1 2 and 4 filters to attenuate any input and in the camera adjustments the exposure time can be varied by a factor of 1000 to further attenuate or optimize the measured intensity level We have found that almost any low power beam can be measured so using 4 reflections of uncoated surfaces are generally a waste of your laser power We recommend using the transmission through HR reflecting mirrors with polished back surfaces as the least intrusive method in a typical optical set up Power in 2mm diameter beam needed to satura
17. eviation from these guidelines In general however a larger spacing between cameras will allow for tighter pointing control since the maximum pointing drift under closed loop operation will be determined by the ratio of the Target size to the separation between the cameras For example for a 30 2lm Target pointing drift will be limited to 60 Plrad for a 0 5 m separation and 30 Plrad for a 1 m separation 12 LASER BEAM IN _ MIRROR MOUNT 1 d MIRROR AMERA 1 MOUNT 2 j _ LASER BEAM OUT CAMERA 2 Figure 10 Example physical layout of mirrors and cameras for GuideStar II system To optimize performance Camera 2 can be positioned so as to image a plane equivalent to the users working plane This can be accomplished by setting the distance between the second pickoff and the working plane comparable to the distance between the second pickoff and Camera 2 s object plane which is about 4 cm in front of the lens By doing this the beam position data and image shown by the GuideStar ll software are essentially those of the working plane 13 4 4 Software Operation 4 4 1 System Set up The first time the application is launched it will automatically open the System Set up window and display the Camera Check tab Camera Check GuideStar Il Auto Configuration GuideStar Il System Set up Part 1 Step 1 Set up system so that the beam can be seen on both cameras Step 2 Block the light going to the came
18. ltage Any mishandling could result in irreparable damage to the equipment and personal injury or death 2 1 3 European Union CE Mark CE Figure 3 CE Mark The presence of the CE Mark on Newport Corporation equipment means that this instrument has been designed tested and certified compliant to all applicable European Union CE regulations and recommendations 2 1 4 Alternating Voltage Symbol Figure 4 Alternating Voltage Symbol This international symbol implies an alternating voltage or current 2 1 5 USB J Figure 5 USB Symbol The symbol in the figure above identifies the USB connector location on the Model 8783 Controller 2 1 6 Frame or Chassis Figure 6 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the Model 8783 Controller This symbol identifies the frame or chassis terminal 2 1 7 Waste Electrical and Electronic Equipment WEEE Sas Figure 7 WEEE Directive Symbol This symbol on the product or on its packaging indicates that this product must not be disposed with regular waste Instead it is the user responsibility to dispose of waste equipment according to the local laws The separate collection and recycling of the waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For information about where the user can drop off the waste equipment for recycling plea
19. nded 3 pronged receptacles only Failure to observe this precaution can result in severe injury death There are no user serviceable parts inside the Model 8783 Guidestar II controller Work performed by persons not authorized by Newport Corporation will void the warranty If this equipment is used in a manner not specified in this manual the protection provided by this equipment may be impaired 2 2 4 Additional power supply warnings This product is equipped with a three prong plug For proper operation and your protection this plug should not be modified and must be plugged directly into a properly grounded three prong receptacle This product if not provided with a power switch Do not block access to the power connector in case emergency shutdown is required Voltages of up to 130V are accessible inside the driver chassis mounts and Picomotors Although protection circuits are included do not operate the units with the driver or mount covers removed If the wire of a mount of Picomotor is frayed discontinue use and return item for repair 3 Getting Started 3 1 Unpacking and Handling It is recommended that the Model 8783 GuideStar II controller be unpacked carefully in a lab environment small parts are included with the instrument Inspect the box carefully for loose parts You are advised to save the packaging material in case you need to ship your equipment in the future 3 2 Inspection for Damage The Model 8783 GuideS
20. nno 4 22 ee kisasa a Aorist eto 4 2 1 3 European Union CE Mark occccccnnnnnnnnnccnnnnnnnnnnnnno 5 2 1 4 Alternating Voltage Symbol oooooonnnccncnnncnnnnnnno 5 DN OS De a a a a 5 ZO Pranc Or COMAS aa J 2 1 7 Waste Electrical and Electronic Equipment WELE AU em 6 2 1 8 Control of Hazardous Substances eee 6 22 Warmings and Cautions aa ia 7 22 1 General W ATM NGS oia 7 lizado General Cantos iia 7 2 2 3 Summary of Warnings and CautloNS ccccccccnnnn 8 2 2 4 Additional power supply WarNINgS occccccccccnnnnn 8 3 Getting Started ccccccssssseeesssesseeeeeeeenees 9 a Unpackine and Hands rai 9 S22 IMSPECHON for DAMA SE ias 9 ie Fam car LD Ge ae T T 9 3 4 Choosing and Preparing a Suitable Work Surface 9 2 3 Electrical Requirements iio 10 3 07 Computer TEQUITEMENNS secetei arenai eiiie 10 4 System Operation ccccccssesseeeeeeeeees 11 Al INS UNC Wir ca 11 Ad SA A a E 11 4o y LE O A O A 12 4 3 1 Beam Pick offs and Optical Power 12 AS Optical Layout iari ees 12 AA Software Operat ON sekesi 14 gA System Set npe a N 14 442 Guide Stat ll Tabu 15 do Beam Pronker Tasa 18 4 4 4 Pointing Stability Tab oooooononnncnnncccnnnnonnnnnns 19 4 4 5 Stability Analysis adios 19 4 4 6 Changing Scales on Images and Charts 20 4 4 7 Exiting the GuideStar Il Application 20 Principles of Operation cce
21. of ambient or stray light To close the Camera Settings window click on the OK button 16 This button will turn off Lock and open the Motion Settings window O Motion Settings l E Camera 1 X Target Camera 2 X Target mr lo miT 0 000 miT Set Target Position Camera 1 Y Target Camera 2 Y Target fo oo0 mm 0 00 mim Target Width Inner Target microns Fraction Inner Target po x goz microns Inner Gain Loop Gain Fraction Inner Gain dos Ea Mos Frames to Average Over E Acquire Motion i Matrix Set Target Position This button will reset the target centers to the current beam locations This can be executed without the need to re acquire the Motion Matrix Target Width is the size of the Outer Target Inner Target Fraction Target Width multiplied by the Inner Target Fraction gives the Inner Target size Loop Gain When position Lock is on and the beam moves outside the outer target the motors are commanded to move the beam back to the Inner Target The distance to the center of the Inner Target scaled by the Loop Gain is the size of the step taken This parameter will influence the dynamic response of the control loop It is recommended that one start with the default value and adjust it to achieve a well behaved no ringing relatively fast return of the beam to the Inner Target A higher value will increase speed of loop response but may lead to ringing or erratic behavior A lower value will give a
22. ra closest to the laser The Camera 1 image should disappear Step 3 Block the light going to the camera furthes from the laser The Camera 2 image should disappear If cameras are reversed refer to manual Step 4 The camera saturation level is 255 Set the Exposure Time to be below saturation Camera 1 Camera 2 Exposure time Exposure time 0 07 20 40 60 78 06 0 07 20 40 60 83 81 Cam 1 Max Value 219 Cam 2 Max Value 214 This window cannot be closed until steps 1 4 are completed If blocking the beams to the cameras causes the wrong image to disappear in the GuideStar Il display then swap the camera IDs See FAQ section Now click Next or click on the GuideStar Il Auto Configuration tab J System Set up Camera Check GuideStar II Auto Configuration GuideStar Il System Set up Completion Step 5 Align the beam to the center of the images then click Set Target Postion Set Target Position Step 6 Click Acquire Motion Matrix to begin the movement matrix measurement Acquire Motion Matrix Step 7 Click Acquire Target Size to determine optimum target size Acquire Finished 14 Set the target position by clicking the Set Target Position button This will ensure that the system will return to the original alignment after the motion acquisition The target position can easily be re set later if additional adjustment is desired This is done by re clicking the Set Target Position bu
23. romptly notify Newport s Returns Department by calling 1 800 222 6440 or by visiting our website at www newport com returns within the warranty period to obtain a Return Material Authorization Number RMA Return the product to Newport Corporation freight prepaid clearly marked with the RMA and we will either repair or replace it at our discretion Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMAH E mail rma service newport com When calling Newport Corporation please provide the customer care representative with the following information Your Contact Information Serial number or original order number Description of problem i e hardware or software To help our Technical Support Representatives diagnose your problem please note the following conditions Is the system used for manufacturing or research and development What was the state of the system right before the problem Have you seen this problem before If so how often Can the system continue to operate with this problem Or is the system non operational Can you identify anything that was different before this problem occurred Table of Contents T IMO GUCIION rasca 3 1 1 Summary of GuideStar Il System occcccccnnnnnnncncnnnnnnns 3 2 Safety Precautions cccccceceeeeeseeeeeees 4 2k _ Detimtons and MD aan 4 2 1 1 General Warning or CautiON ccccccoonoccnnnnnnnnnnnnn
24. s Do not let any other equipment blow hot air towards the unit 3 6 Computer requirements Software Windows 7 32 bit 64 bit Windows XP 32 bit only Processor AMD DUAL CORE AMD QUAD CORE Intel Pentium Dual Core Intel Pentium Quad Core Intel Pentium Core 13 i5 17 RAM 4GB minimum HDD 160GB minimum DVD player Screen resolution 1920x1080 minimum Monitor HD 1920x1080 resolution minimum 10 4 System Operation 4 1 System Overview GuideStar Il is a closed loop beam stabilization system in which cameras measure beam position at two points along the beam path while two preceding mirrors actuated by Picomotors keep these two positions steady The centroid information from each camera is processed and fed back to the X and Y control of each mirror mount in a generalized manner via a 16 element array called the Motion Matrix This approach accounts for all direct and cross couplings between the centroid position and the mirror axes allowing for nominally perfect control of the beam with arbitrary optical systems An automated calibration routine provides the needed stimulus to each motor to determine the Motion Matrix values The control loop functions by making adjustments to the mirrors only when the beam has drifted out of a user defined target area on one or both of the camera sensors When this happens the beam is moved back inside the target area on both sensors To provide control over how often the beam
25. se contact your local Newport Corporation representative 2 1 8 Control of Hazardous Substances RoHS Compliant Figure 8 RoHS Compliant Symbol This label indicates the products comply with the EU Directive 2002 95 EC that restricts the content of six hazardous chemicals 2 2 Warnings and Cautions 2 2 1 General Warnings Observe these general warnings when operating or servicing this equipment e Heed all warnings on the unit and in the operating instructions e Donotuse this equipment in or near water e This equipment is grounded through the grounding conductor of the power cord e Route power cords and other cables so that they are not likely to be damaged e Disconnect power before cleaning the equipment Do not use liquid or aerosol cleaners use only a damp lint free cloth e Lockout all electrical power sources before servicing the equipment e To avoid fire hazard use only the specified fuse s with the correct type number voltage and current ratings as referenced in the appropriate locations in the service instructions or on the equipment Only qualified service personnel should replace fuses e To avoid explosion do not operate this equipment in an explosive atmosphere e Qualified service personnel should perform safety checks after any service 2 2 2 General Cautions Observe these cautions when operating this equipment e f this equipment is used in a manner not specified in this manual the protection pro
26. tances of 2m so angular tolerances of lt 5urad What is the beam pointing which results from one step on a Picomotor A typical Picomotor step is lt 25nm and mirror mount lever arm is 50mm so the angular change with one step is less than O 5urad Do we have to set up the 2 cameras after the two mirror mounts It is common for set ups to have CAM1 directly behind MM2 This is not a configuration we recommend because in this set up any movement of MM2 will have no effect on the beam going to CAM1 and so there are multiple solutions for the beam to hit the two cameras What should do if don t see the beam on one or both Camera s Make sure both cameras are connected to the Model 8783 Controller If so try lowering the Camera Pixel Clock setting to 10 20 If the problem persists close the GuideStar ll application and open the MicroEye Camera Manager program Ensure that both cameras show up in the Camera List 24 How do swap camera ID s Close the GuideStar Il application and start the uEye Camera Manager Both cameras should appear in the list Select one then click Camera Information and change its camera ID from 1 to 2 or from 2 to 1 Click OK and then do the same for the other camera Close the uEye Camera Manager and restart the GuideStar ll application If the System Set up window does not open after re starting click the System set up button Perform the camera check again None or only one of my Picomo
27. tar Il controller is carefully packaged at the factory to minimize the possibility of damage during shipping Inspect the box for external signs of damage or mishandling Inspect the contents for damage If there is visible damage to the instrument upon receipt inform the shipping company and New Focus immediately Carefully open the box and save the shipping material for later use 3 3 Parts List The following is a list of parts included with the Model 8783 GuideStar Il controller e 8783 GuideStar Il controller e CD with Software Drivers and Utilities User s Manual Start Up Guide e Power adaptor and power cord e USB cable for connecting to computer If you are missing any parts or have questions about the parts you have received please contact New Focus 3 4 Choosing and Preparing a Suitable Work Surface The GuideStar II may be placed on any reasonably firm table or bench during operation 3 5 Electrical Requirements Before attempting to power up the unit for the first time the following precautions must be followed To avoid electric shock connect the instrument to properly earth grounded 3 pronged receptacles only Failure to observe this precaution can result in severe injury death e Have a qualified electrician verify the wall socket that will be used is properly polarized and properly grounded e Provide adequate distance between the Models 8783 GuideStar Il Controller and adjacent walls for ventilation purpose
28. te GSIl Camera 1 mW 1 uW 1 nW i 300 400 500 600 700 800 900 00 100 00 1300 Wavelength nm What is the largest beam the system can measure The camera aperture is 12 mm so a larger beam will over fill the camera What is the limiting resolution of the camera The pixel size resolution of the CMOS sensor is 5 2um but the beam position resolution is much smaller than this because the beam is measured over a large number of pixels The camera position resolution noise had a standard deviation 0 04um and temperature drift coefficients of 3um C vertical and 0 5um C horizontal With a 2 7 1 telescope all these numbers get multiplied by 2 7 What is the temperature sensitivity of the cameras Measurements of beam position in a quiet environment have shown temperature drift coefficients of 3um C vertical and 0 5um C horizontal With a 2 1 1 telescope these numbers get multiplied by 2 1 What is the minimum angular change we can detect with the system The accuracy of the beam position spec of 25um is very conservative The noise we see with a closed optical path measurement with no air turbulence over a minute is lt 0 1um The angular change that this corresponds to depends on the distance to the mirror from the camera but if we assume gt 0 1m distance then the angular noise is lt lurad In reality we see air turbulence and temperature drifts lead to beam noise of more than this but we have locked with targets sizes of 10um and dis
29. tors is moving either manually or automatically How can fix this First make sure that the each Picomotor is connected to its appropriate port on the Model 8783 GuideStar II Controller front panel If so it has been found that the best course of action is to un install the GuideStar II application and all associated programs files then re install This will usually do the trick What is the advantage using CMOS camera instead of PSD The position measurement performances are similar but the camera gives information on beam size and shape as well We use that information to make sure the stabilization routine is smart and does not have any unnecessary or dangerous beam steering 25 Maintenance and Service 7 1 Warranty New Focus Newport Company guarantees its lasers to be free of defects for one year from the date of shipment or for 3000 hours of operation whichever comes first This is in lieu of all other guarantees expressed or implied and does not cover incidental or consequential loss 1 2 Technical Support Information and advice about the operation of any New Focus product is available from our technical support engineers For quickest response ask for Technical Support when calling the numbers listed below and know the model and serial number for your product Hours 8 00 5 00 PST Monday through Friday excluding holidays Toll Free 1 866 NUFOCUS 1 866 683 6287 from the USA Canada only Phone 4
30. tton Next click the Acquire Motion Matrix button Over the next several minutes the system will move each motor X1 Y1 X2 Y2 by pre defined amounts in the positive and negative directions It will stop once it has gathered enough information or the beam has moved to the edge of the optical aperture Once the motion matrix acquisition is finished the green light next to the Acquire Motion Matrix button will be lit Finally click the Acquire Target Size button and the software will analyze the noise of the beam to determine a recommended target size for the motion settings The recommended target size can be changed later if desired Click the Finished button to close the System Set up window and save the settings via the pop up window 4 4 2 Guide Star ll Tab The first tab of the GuideStar Il program is labeled Guide Star Il On this tab is each camera s image a display of the target and centroid locations for each camera buttons for System Set up Camera Settings and Motion Settings indicator lights and a Lock On Off button and two controls for manually activating the motors Guide Star Beam Profiler Pointing Stability Stability Analysis Camera 1 A Newport Corporat y New Focus jon Brand GuideStar IT Charts Position Indicators Zoom Target ij This button will turn off Lock and open the same System Set up window described above which is launched when the program is first run System set up c
31. vided by this equipment may be impaired e Do not block ventilation openings e Do not position this product in such a manner that would make it difficult to disconnect the power cord e Use only the specified replacement parts e Follow precautions for static sensitive devices when handling this equipment e This product should only be powered as described in the manual e There are no user serviceable parts inside the Model 8783 GuideStar II controller e Adhere to good laser safety practices when using this equipment 2 2 3 Summary of Warnings and Cautions The following are definitions of the Warnings Cautions and Notes that are used throughout this manual to call your attention to important information regarding your safety the safety and preservation of your equipment or an important tip The following general warning and cautions are applicable to this instrument Before operating the Model 8783 GuideStar II controller please read and understand all of Section 2 Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged Damaged equipment may present additional hazards to you Contact Newport technical support for advice before attempting to operate damaged equipment Before cleaning the enclosure of the Model 8783 GuideStar II controller the AC power cord must be disconnected from the wall socket To avoid electric shock connect the instrument to properly earth grou
32. well behaved response but may make the response to slow Typically Loop Gain is set such that the beams are brought back to their Inner Targets within 2 5 seconds Inner Gain Fraction This value will scale the loop gain once the beam is within the Outer Target Frames to Average Over Determines the level of running averaging for centroid locations used in the control algorithm As with Loop Gain it is recommended that one start with the default value and adjust itto achieve a well behaved no ringing relatively fast return of the beam to the Inner Target A higher value may slow loop response but may improve performance overall Acquire Motion Matrix Click this button to initiate the routine to acquire the Motion Matrix This only needs to be done during the initial system set up This routine can take several minutes 17 gt AS E a Manual Picomotor Controls o Manual Picomotor Controls The pair of four arrows with buttons provide manual control of the Picomotors These can be used to manually position the beams during set up and also to test the response of the control loop By pressing a button while Lock is on the dynamic performance of the loop can be evaluated Set the Manual Step Size such that clicking an arrow will take the beams out of the Outer Target area Ideally the beams will return to their targets in a relatively fast and well behaved manner This is a useful test when adjusting the Motion Settings see below to optimize
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