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Both QHY990 and QHY991 include a 25mm filter holder. 25mm filter is a very common filter type for lab applications. The SWIR filter is easy to be installed inside the camera. With this adapter, the camera still meets the 17.5mm C-mount B.F.L.
QHY990 and QHY991 have both air cooling and liquid cooling version. The air cooling can get the -35C below ambient. The liquid cooling version can get -45C below ambient with normal temperature liquid and can get -60 to -80C below ambient with cold liquid. Typically the InGaAs sensor has a high dark current than Silicon-based material. If you are doing the long exposure with this camera (eg. exposure >5 sec) QHYCCD recommends selecting the liquid cooling version.
Applications: SWIR Astronomy Imaging and Photometry, Daytime Star Observing, Optical Communication, Laser, Optic Labs.
|IMX990 SWIR Sensor
|IMX991 SWIR Sensor
(includes optic black pixels)
|Effective Pixel Area
|Effective Image Area
|AD Sample Depth
|Electric Global Shutter
|77% @ 1200nm
|The measured data is after Bias Frame FPN calibration
Typical 150 e- at lowest gain
|66FPS@Full Resolution 12bit
|133FPS @ Full resolution 12bit
254FPS @ 240Line 12bit
|One Hardware Trig-In Socket (RCA type).Opto-isolated
|Flange with 6-M3 screw holes
|25mm Filter Adapter
|Support D=25mm and D=25.4mm filter
|Back Focal Length
17.5mm with 25mm filter adapter, 14.5mm without filter adapter
|Dual Stage TE Cooler
Air Cooling version
(Test temperature +20°)
Liquid Cooling version
|Recommended flow rates for water-cooled versions
Here are the stars in the daytime with QHY991 camera by Martin Miller:
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