QHY990/QHY991 SWIR Camera

The QHY990/QHY991 SWIR cameras are scientific short-wavelength infrared cameras equipped with Sony IMX990/IMX991 InGaAs sensors. Let’s explore their features:

1. Sensor and Resolution:

   • Both the QHY990 (monochrome) and QHY991 (color) cameras use the Sony IMX990/IMX991 InGaAs sensor.
   • The sensor has a square pixel array with 5μm x 5μm pixels and provides 1.31M/0.4M effective pixels.
   • These chips have a wide waveband sensitivity range from 0.4μm to 1.7μm with high sensitivity.
   • Quantum efficiency (QE) is up to 77% at 1200nm.

2. Low Noise and High Sensitivity:

   • By using Cu-Cu interconnect technology, the sensors exhibit very low fixed pattern noise (FPN) and a low defect pixel ratio.
   • The QHY990/QHY991 cameras include 25mm filter holders, commonly used for lab applications.
   • The SWIR filter can be easily installed on the camera with a 17.5mm C-mount back focal length (B.F.L.).

3. Cooling Options:

   • The QHY990Pro II version offers both air cooling (achieving -35°C below ambient) and liquid cooling (customization).
   • The liquid cooling version can achieve temperatures as low as -45°C below ambient with normal temperature liquid and even -60°C to -80°C below ambient with cold liquid.

4. Applications:

   • SWIR Astronomy Imaging and Photometry
   • Daytime Star Observing
   • Optical Communication
   • Laser and Optic Labs

For detailed specifications and pricing information, you can visit the QHYCCD website.

. Its high sensitivity and cooling options make it a valuable tool for researchers and observatories

QHY990Pro II have both air cooling and liquid cooling version (customization).  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 need long exposure (eg. >5 sec), we recommend the liquid cooling version.