Raytheon has developed a 3rd-Generation FLIR Sensor Engine (3GFSE) for advanced U.S. Army systems. The sensor
engine is based around a compact, productized detector-dewar assembly incorporating a 640 x 480 staring dual-band
(MW/LWIR) focal plane array (FPA) and a dual-aperture coldshield mechanism. The capability to switch the
coldshield aperture and operate at either of two widely-varying f/#s will enable future multi-mode tactical systems to
more fully exploit the many operational advantages offered by dual-band FPAs. RVS has previously demonstrated high-performance
dual-band MW/LWIR FPAs in 640 x 480 and 1280 x 720 formats with 20 μm pitch. The 3GFSE includes
compact electronics that operate the dual-band FPA and variable-aperture mechanism, and perform 14-bit analog-to-digital
conversion of the FPA output video. Digital signal processing electronics perform "fixed" two-point non-uniformity
correction (NUC) of the video from both bands and optional dynamic scene-based NUC; advanced
enhancement processing of the output video is also supported. The dewar-electronics assembly measures approximately
4.75 x 2.25 x 1.75 inches. A compact, high-performance linear cooler and cooler electronics module provide the
necessary FPA cooling over a military environmental temperature range. 3GFSE units are currently being assembled
and integrated at RVS, with the first units planned for delivery to the US Army.
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