Alpy calibration User Guide
Contents
1. 120 seconds for calibration F Aud ACE visul G AstroTonight ArgNe180 1 fit o a File View Images Analysis Camera Telescope Setup Help Se 1355s X 60 277 000000 Camera Not connected uto 3 I mm J 23 Y 26 15 04 2013 14 41 00 UT Mount _ Not connected 10 seconds for flat field 74 Aud ACE visul G AstroTonight Flatl0 3 fit o a File View Images Analysis Camera Telescope Setup Help I HH 3374 x l Camera Not connec ted Auto 1d Im I 49 Y 15 04 2013 14 39 10 UT Mount Not connected In any case always make sure that your images are not saturated refer to the Alpy 600 user guide LEDs meaning summary Both LEDs are off the calibration module is deac tivated the light beam coming from star is open LSshelyak INSTRUMENTS 11 As with any lamps the ones in Alpy Calibration have a limited lifetime If you need to replace these lamps proceed as below We suggest removing the Alpy spectroscope from the telescope to do it but is is not strictly required if you have enough room around the calibration module to use a screwdriver 3 1 Replacing the calibration lamp ow Before any maintenance on the calibration module switch off any power supply re move the plug Loosen the two screws in the calibration lamp con nector Remove the screw in the middle of the cover and loosen the other two Replace the lamp The lamp is asymmetric P2. Alpy calibration User Guide Olivier Thizy olivier thizy shelyak com Francois Cochard francois cochard shelyak com AVL MS Alpy calibration module User Guide Olivier Thizy olivier thizy shelyak com Francois Cochard francois cochard shelyak com February 2014 Ref DC0018 rev B Table of Contents Introduction 3 1 Discover your Alpy calibration module 4 Ld OME OVINE DO 4 eo om 6 OBOE A SORE X xu EI Go oua 939 39 9 Re 9 49 3 2 9 9 3 4 1 2 Alpy calibration specifications 4 1 3 Alpy calibration principle s Rae ed NT Ne sn 4 LA POWErSUDDIY a o ee eRe EEE ee 7 LS Mechanicali ierlacas 6 64464 sp RR SRL IR IR eS SD Oe HORROR e Oo d ab dh SR E UK ES 7 2 Using the calibration module 8 2 1 Westie the mod le ge 3 3 5 x4 903 99 ROCHE HELE HES lier Didi tone 8 Zl Remote COMO s 26602446 Abd igh w x9 X0 don mus ew Ee whe dh C n dd EEE Ag es 9 2 1 2 Lamps lifetime saving function 9 2 2 Installing the Alpy calibration module 9 2 3 During observations 24 4 45 64 ee RR HR 390 EOE Ue AC BL SR x E E E09 Row X3 oc s 4 RRO E ES 10 3 Maintenance 12 3 1 Replacing the calibration lamp 12 3 2 Replacing the flat lamp 44444444 eo sus 13 INSTRUMENTS Alpy is a family of modular elements for astronom ical spectroscopy The Alp
3. During observations the Alpy guiding module and the switches are at the opposite side to the guiding camera Once the Alpy spectroscope including the calibra tion module is installed on the telescope plug in the Firmly tighten the four screws power Supply Cadarenockey When observing the stars the calibration module has no effect on your instrument and images the screen is outside the telescope light beam Attach the T mount 2 adapter to the Alpy cali bration module When observing stars both LEDs should be off PShelyak 10 INSTRUMENTS CHAPTER 2 USING THE CALIBRATION MODULE Switch on the calibration lamp when you need to take One LED is on the matching lamp is on and the calibration images It can be done manually or re screen is across the telescope beam motely see section 2 1 1 When the calibration lamp Both LEDs are flashing neither lamp is on but is on the matching LED is on as well the screen is across the telescope beam One LED is flashing the matching lamp has been E EN automatically switched off after 30 minutes to pre Wy Ensure the lamp is switched off at the end of serve its lifetime Just reset the matching switch to your calibration exposures restart the normal behavior Proceed in the same way for the flat lamp Typical exposure times The exposure time depends on several parameters CCD camera equipment configuration but typical exposure times are
4. the manual switches are OFF 2 1 2 Lamps lifetime saving function The lamps mainly the calibration one have a lim ited lifetime In normal conditions it should be with out significant effect because the exposure time for calibration spectra is short a few seconds each But we know by experience that it is possible to forget to switch off the lamps at the end of the night To pro tect the lamps we ve added a feature which automat ically switches off the lamp after about 30 minutes This also works for the flat lamp When this happens the corresponding LED flashes You can simply switch off the lamp and switch it back on again immediately it will be back on for 30 minutes max Cw When one LED is flashing the lamp has been switched off to protect the lamp s lifetime 2 2 Installing the Alpy calibration module This sections explains how to install the calibra tion module on the Alpy guiding module Alterna tively you can adapt the installation to your specific equipment Remove the T mount 2 adapter from the Alpy guiding module INSTRUMENTS 9 Alpy calibration User guide Attach the calibration module to the guiding mod The instrument is now ready for installation on the ule with the four screws included in the package telescope refer to the Alpy 600 and Alpy guiding user guides Position the calibration module in such a way that the black foam on the screen is towards 2 3
5. ED will be visible from outside Plug in the power supply cable and switch on the calibration lamp left switch Now switch off the calibration lamp and switch on the flat lamp This lamp is much brighter than the cal ibration one The screen moves to the middle of the calibration module and the calibration lamp is illuminated the intensity is low look directly at it in a dark room ce 8 INSTRUMENTS CHAPTER 2 USING THE CALIBRATION MODULE wy The calibration lamp is close to the screen to have maximum efficiency The halogen lamp is on the side to limit its intensity and prevent a too short exposure time You can keep the screen in place and switch off both lights by activating both switches In this configura tion both LEDs will flash slowly wy When both LEDs are flashing the screen is across the telescope beam but no lamp cali bration or flat is on This is useful for taking off set or dark images at night but a separate shutter is still required in full daylight 2 1 1 Remote control Each switch is accompanied by a socket The sock ets are mechanically and electronically the same as the power supply one 12V positive voltage on the central pin Powering these connectors with 12V has the same effect as manually switching It allows the Alpy calibration module to be controlled remotely ww When controlling the Alpy calibration mod ule remotely take care that
6. e Calibration screen activated Light going to spectroscope The screen has a black outer area and a central white reflecting area which is designed to make a F 5 beam when used in combination with the Alpy guiding and Alpy 600 modules 4 INSTRUMENTS CHAPTER 1 DISCOVER YOUR ALPY CALIBRATION MODULE Feature Value Unit Comment Dimensions 100x95x30 mm see fig 1 1 below Weight 300 g Power supply voltage 12 V Positive in the central pin Power supply current 1 A max Power supply connector standard 5 5x2 5mm Mechanical interface 4 screws T mount thread M42x0 75mm Table 1 1 Alpy calibration specifications Figure 1 1 Alpy calibration dimensions ce INSTRUMENTS 5 Alpy calibration User guide Ar 7635 11 Ar 7503 87 A i wwwwwevwwwvwwwvwmvimcmwuuauvevavwuv vm ai Ar 727294A7 SS i C Ar 7067 22 BOO Le Ar 6965 43 Ar 6677 28 Ne 6402 25 Ne 6143 06 Ne 5852 49 calibration Ar 4764 87 Ar 4510 73 Ar 4200 67 Ar 3948 98 I b n h3lsuagutr ATJEH Figure 1 2 Main calibration lines C 6 INSTRUMENTS CHAPTER 1 DISCOVER YOUR ALPY CALIBRATION MODULE When the screen is in place you can switch on ei ther the calibration light the white halogen light for flat field or neither of them In the last configuration you can take offset or dark exposures the screen pre vent
7. s the starlight entering the spectroscope The screen is activated by a servo motor When the calibration module is deactivated the screen is moved out of the telescope beam and has no effect on the light coming from the telescope 1 4 Power supply The Alpy calibration module must be powered with 12V The power supply socket is the central one The connector is a standard 5 5 x 2 5mm with the positive voltage on the central pin outside is ground The current is 1A max It is the halogen lamp which is the main consumer 500mA Of course when the lights are switched off the consumption of the mod ule is only a few pA wy The electronics include a voltage converter from 12V to 300V to excite the Argon gas in the calibration lamp The current is limited to few mA but you must make sure the power sup ply is unpluggged before opening the calibration module 1 5 Mechanical interfaces The Alpy calibration module is mounted on the Alpy guiding module with four M4 screws see drawing 1 1 On both sides of the module there is a standard T mount thread M42 x 0 75mm INSTRUMENTS 7 Using the calibration module 2 1 Testing the module There are two switches on the Alpy calibration mod ule One is for calibration and the other for the flat field halogen lamp ALED indicates that the lamp is on It will be useful when the Alpy calibration moduleis on the telescope no light other than L
8. sults there Enjoy Spectroscopy Olivier Thizy Frangois Cochard 39 Ge Introduction requires additional external 12V signals http www shelyak com http groups yahoo com group spectro l http www spectro aras com forum olivier thizy shelyak com francois cochard shelyak com ee INSTRUMENTS 3 Discover your Alpy calibration module 1 1 Out of the box When receiving your Alpy calibration module you ll find in the box the following parts The Alpy calibration module itself Four screws M4x20mm An Allen wrench for attaching it to the Alpy guid ing module 1 2 Alpy calibration specifications Table 1 1 gives detailed specifications of Alpy Cali bration Figure 1 1 shows all dimensions The Figure 1 2 gives the wavelength of main lines of the calibra tion lamp 1 3 Alpy calibration principle Making accurate measurements in spectroscopy re quires flat field and calibration images taken under the same conditions as the starlight The principle of the Alpy calibration module is as follows When deactivated the light coming from the telescope goes directly to the spectroscope Calibration screen deactivated t Light going to spectroscope Light coming from telescope When the calibration module is activated a screen masks the light beam coming from a telescope This screen positioned at 45 is illuminated by the cali bration lamp or flat lamp from the sid
9. ut it in the same position as below Remove the cover PShelyak 12 INSTRUMENTS CHAPTER 3 MAINTENANCE If you put the lamp in the opposite direction it will apparently work but the lifetime will be significantly shorter Git will become darker and darker over the time Put back the cover taking care of the servo cable Tighten the three screws that s it 3 2 Replacing the flat lamp Before any maintenance on the calibration module switch off any power supply re move the plug Remove the screw in the middle of the cover and loosen the other two Gently slide the electronics from the calibration mod ule body Take care to protect the halogen lamp dur ing this operation Remove the cover INSTRUMENTS PShelyak 13 Alpy calibration User guide Remove the halogen lamp rotate a quarter turn Replace the lamp Put back the electronics in the body Tighten the four screws around the calibration module Plug in the servo connector take care of the orientation refer to the circuit markings Put back the cover taking care of the servo cable Tighten the three screws that s it LSshelyak 14 INSTRUMENTS
10. y calibration module allows you to take quickly and simply flat field and wave length calibration images manually or even remotely It also can be used to make offset and dark images us ing a screen that blocks the light from the telescope Equipment configuration The Alpy calibration module is specifically dedicated to the Alpy 600 spectroscope and is optimized for use in combination with the Alpy guiding module The Alpy calibration module can be used in various con figurations but we cannot doccument all of them In this document we consider that you have an Alpy 600 and the Alpy guiding module and you re already familiar with this instrument You will find in the next chapters a presentation of the Alpy calibration module how to install amp tune it on the Alpy 600 and how to observe with it Astronomical spectroscopy is a never ending story We ve thought about a lot of applications for the Alpy instrument you can find some ideas on the Shelyak Instruments website 2 However we know that you ll invent new ones We ll be very happy to take your experiences into account to continuously improve this product do not hesitate to contact us if you have any comments We invite you to join the growing Shelyak Instru ments users and amateur spectroscopist community on the Spectro L Yahoo group and the Aras forum to share your own experiences and ask questions to the community We are really interested to see your re
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