Xenics SWIR camera Cougar is LN2-cooled for lowest noise and dark current

Xenics SWIR camera Cougar is LN2-cooled for lowest noise and dark current

Leuven, Belgium / Stuttgart, Germany, 30 October 2012Xenics, Europe's leading developer and manufacturer of advanced infrared detectors that cover the LWIR to the visible realm, demonstrates the Cougar-640, a high-performance InGaAs camera for extreme low-light-level imaging applications in the shortwave infrared (SWIR) range. LN2 cooling reduces dark current to lowest levels ever seen. The Cougar's spectral response covers 0.9 to 1.7μm at a high resolution of 640 x 512 pixels. At Vision 2012, Xenics exhibits in Booth 1D82, Hall 1.

The new Xenics Cougar camera covering the SWIR realm 0.9.to 1.7μm incorporates an in-house designed InGaAs detector XFPA-1.7-640-LN2 featuring 640 x 512 pixels at a pixel pitch of 20μm and full 24 bit ADC. The detector is optimized for 77K liquid nitrogen (LN2) cooling and is based on an SFD (Source Follower per Detector) read-out topology to achieve ultra low noise levels of 15e- (@T = 77K, Tint = 50μs), gain at 2.2 μV/e- and full well of 400.000 e-. Pixel operability is >98 percent.

The Cougar camera offers extremely low dark current specification of less than 10e- per pixel which allows integration times of several hours. Together with the Read While Integrate (RWI) feature, the Cougar is perfectly suited for extremely low-light-level applications such as photoluminescence measurements in semiconductor manufacturing and failure analysis, Raman spectroscopy or astronomy. Exposure time reaches from 5.6μs up to severalhours. A non-destructive read-out mode simplifies operation when long integration times are used.

The high-resolution 640 x 512 InGaAs camera features a maximum full frame rate of 1.42 Hz. The frame rate can be increased when a smaller region of interest is selected through the windowing mode. Window size can be arbitrarily defined from 2x4 upward. Read-out mode is Integrate Then Read (cooled or uncooled) or Read While Integrate (77K cooled).

The Cougar setup consists of two modules: a Dewar (178L x 93W x 207H mm³) containing the LN2-cooled InGaAs sensor, and a separate housing for the control and read-out circuitry (40L x 100W x 130H mm³). Camera interfacing is provided via standard CameraLink interface for ease of integration.

Professional service, knowledge and advice!

Secure in Air appreciates the professional service, knowledge and advice of Xenics in implementing the Gobi camera in our project GeoCampro. Our client was more than satisfied with the results, looking for (thermal) defects in the railways. 

Robert de Nes, Secure in Air