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Proceedings Paper

Low-cost 320x240 lead salt focal plane array
Author(s): Timothy R. Beystrum; Niels Jacksen; Marcus L. Sutton; Mark K. Preis; Charles F. Walmsley
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Paper 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.

Paper Details

Date Published: 10 September 2001
PDF: 9 pages
Proc. SPIE 4372, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XII, (10 September 2001); doi: 10.1117/12.439144
Show Author Affiliations
Timothy R. Beystrum, Litton Electro-Optical Systems (United States)
Niels Jacksen, Litton Electro-Optical Systems (United States)
Marcus L. Sutton, Litton Electro-Optical Systems (United States)
Mark K. Preis, Litton Electro-Optical Systems (United States)
Charles F. Walmsley, Walmsley (Microelectronics) Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 4372:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XII
Gerald C. Holst, Editor(s)

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