Deep-cooled scientific SWIR camera
In close cooperation with the Laboratoire Pierre Aigrain from the prestigeous Ecole Normale Supérieure, NIT have developed a breakthrough solution in scientific SWIR imaging. The resulting product is a deep-cooled camera system giving access to virtually unlimited linear dynamic range SWIR imaging. This system is a technological breakthrough for the most demanding applications such as in astronomy.
The patented WiDy technology combined with non-destructive readout (NDRO) permits to acquire images with linear scale in virtually unlimited dynamic range. It takes advantage of the initial linear sensor response at low illumination. Taking advantage of the NDRO, one can integrate the image using differential increases. When bright objects reach the logarithmic response regime, the differential increase tends to zero while the darker regions of the image continue to build up.
This acquisition mode does not use any trick; it is directly extracted from direct image build-up during one single exposure.
As a result, a scene with both bright and faint objects can be imaged in one exposure. The overall exposure time needed is shorter than with classic multiple exposure technique.
- IR FPA: hybrid InGaAs on ROIC NSC1201 from NIT
- 0,9 ~ 1,7 µm with flat QE between 75 and 80%
- 250 K TE cooling, optionally 77 K LN2 cooling
- dark signal: <10 e-/s @ 77 K
- system gain: 2 e-/ADU
- well depth: 110 ke- (linear dynamic)
- readout noise: <70 ADU without processing, <10 ADU with NDRO processing
- snapshot NDRO (non-destructive read-out)
- global shutter
- up to 24 fps
- exposure: from 10 µs to >1 h (at 77 K) for the linear response
- wide dynamic range with native logarithmic response for high photon flux
- 16 bits
- CameraLink interface