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New cheap SWIR cam on eBay

SWIR
3 replies to this topic

#1 Andy Perrin

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Posted 14 December 2019 - 05:24

https://medium.com/v...ra-c5432b3a0f3f

https://www.ebay.com...hEAAOSwRsRdWbbT

128x128 resolution

When they hit 320x240 or whatever, I may want one...the TriWave is nice but not portable at all. Incidentally, the website falsely claims that nobody has used germanium for SWIR, when as we know, the TriWave does. I would very much like to know what is going on here. Is there a relationship between the former NoblePeak and Stratio, who makes this new camera?

Edited by Andy Perrin, 14 December 2019 - 05:28.


#2 WiSi-Testpilot

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Posted 14 December 2019 - 08:38

Very interesting. SWIR is still missing in my collection.
Best regards,
Wilhelm

Edited by WiSi-Testpilot, 14 December 2019 - 09:01.


#3 dabateman

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Posted 15 December 2019 - 05:38

Does look interesting. But I am not sure if you could use filters.
Also what is the quantum efficiency of that type of chip over the wavelength range?
I wonder if it would lean to the 800nm or 1600nm side? That could make a difference. Something I consider with our silicon chip and UV photography. As we are in the 1% and need extremely IR blocked filters.
If it leans to the 800nm side, then simple long pass filters could be used for band isolation.

#4 Andy Perrin

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Posted 15 December 2019 - 05:56

Unknown since I'm not sure of their exact tech. I know the triwave (which is also germanium at least) has this QE:
Attached Image: TriWave-QE.png

But that obviously does not end at 800nm. InGaAs has a peak at 1600 and then goes to 0 nearer 1700, and in the other direction it ends around 900nm.

Edited by Andy Perrin, 15 December 2019 - 05:59.