7 September 2006 Second and third generation thermal imagers based on type-II superlattice photodiodes
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We report on the development of InAs/GaSb type-II superlattice focal plane arrays (FPAs) for missile warning systems in airborne platforms. The FPA fabrication technology was developed on the basis of monospectral superlattices for the MWIR (3-5 μm) spectral range. A monospectral 288×384 MWIR camera with 24 μm pixel pitch, a noise equivalent temperature difference (NETD) better than 14 mK and a background-limited performance (BLIP) up to 92 K is demonstrated. Based on the monospectral technology, the first bispectral superlattice camera was realized. The dual color 288×384 superlattice camera features simultaneous, pixel-registered detection of both spectral channels between 3-4 μm and 4-5 μm with a NETD better than 30 mK and 17 mK, respectively. Hence, spatial or temporal registration problems, which are common to most dual color and dual band infrared imagers are solved with the new bispectral MWIR missile alerting sensor.
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Robert Rehm, Robert Rehm, Martin Walther, Martin Walther, Johannes Schmitz, Johannes Schmitz, Joachim Fleißner, Joachim Fleißner, Johann Ziegler, Johann Ziegler, Wolfgang Cabanski, Wolfgang Cabanski, Rainer Breiter, Rainer Breiter, } "Second and third generation thermal imagers based on type-II superlattice photodiodes", Proc. SPIE 6294, Infrared and Photoelectronic Imagers and Detector Devices II, 629404 (7 September 2006); doi: 10.1117/12.680495; https://doi.org/10.1117/12.680495

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