10 September 2001 Low-cost 320x240 lead salt focal plane array
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Abstract
In pursuit of a low cost, high performance IR, Imager Litton Electro-Optical Systems has developed an Uncooled Lead Salt 320 X 240 camera. The 30 um pitch detectors consist of either Lead Sulfide or Lead Selenide photoconductors fabricated onto a CMOS Multiplexer Read-Out Integrated circuit. The multiplexer uses novel techniques to subtract the large bias current adaptively, and to integrate the residual signal current. The image is acquired in `snapshot' mode. A chopper provides a uniform reference. Although not necessary for functionality, a thermo-electric cooler is incorporated to improve performance. The signal is digitized off focal plane, and pixel substitution/correction functions are subsequently performed. The resulting video signal is either observed on a LCD display at the back of the camera or remoted to an external viewing device.
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Timothy R. Beystrum, Timothy R. Beystrum, Niels Jacksen, Niels Jacksen, Marcus L. Sutton, Marcus L. Sutton, Mark K. Preis, Mark K. Preis, Charles F. Walmsley, Charles F. Walmsley, } "Low-cost 320x240 lead salt focal plane array", Proc. SPIE 4372, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XII, (10 September 2001); doi: 10.1117/12.439144; https://doi.org/10.1117/12.439144
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