JBEBT - 1.25" Spectograph Thingy
Description
2021-03-02 I send this email: The Perseverance landing was tense, but what is really going to be a stressfull, is the James Web Telescope launch this year... Now almost a year later I designed this Thingy, inspired by the James Webb telescope (still cooling at this moment). Next week the first image stacking will take place. In a few more months it will be ready to take the first crisp pictures. The temperature on the hot side has gone up a bit, but hopefully the cold side of the shield won't affect the sensors. The webcam used is a Logitech C615 HD Webcam and the SMD LED has been removed from the PCB. The location is D3 and it shows a + and - sign for orientation of the Diode. The difraction grating I'm using now is from a guy in Israel, but since this is still a thingy in progress I might try other things like CDs or DVDs. So with this in mind I changed the design from having just a bottom cover, to having a closed bottom and a hinge. PLEASE DON'T COMMENT ON THE SLDPRT FILES. I DON"T DO CLEANUPS ANYMORE AND HARDLY LOOK AT THE HISTORY OF DESIGN MYSELF AFTER IT IS FINISHED. WOULD I LIKE TO RE-DESIGN I JUST CONVERT ENTRIES AND MAKE A FRESH MODEL. SO CAN YOU ! Don't worry about the size. The hole is now 2,5mm so smaller when printed. A 2,5mm drill will do fine as a hinge. or any rod that hase the same diameter. I wouldn't drill beyond 3mm. I will later add some electronics later that I use to calibrate the spectrometer. The frequency / LED can be changed by a push of a button and before an external light will show the on / off status, 3 LEDs will burn UV 395nm, Red 700nm and IR 940nm. Not sure how, but probably with a mirror I will reflect the LED's to a slit. Important thing is that there will be a little bit of light with all the frequencies. So coating the inside to reflect the light will be my first try. Problem is I have a wife and 2 kids, so time is a luxury I don't have for these things... Like the James Web this JBEBT will be able to detect red- or blueshift. To be able to see the amount of red- or blueshift emission lines must be detectable. So this might be a failed project from the start if the resolution of the camera / diffraction gratting / angle of attack isn't right. So since I might want to tweak and add some adjustments. I need easy access to the camera module. Adjustment screws might be handy if it works and the part that I haven't created yet is the holder for the diffration gratting now with sticky tape "attached" to the camera. So wait for my final upload, of test along with me :-)
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