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Proceedings Paper

Second and third generation thermal imagers based on type-II superlattice photodiodes
Author(s): Robert Rehm; Martin Walther; Johannes Schmitz; Joachim Fleißner; Johann Ziegler; Wolfgang Cabanski; Rainer Breiter
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Paper Abstract

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.

Paper Details

Date Published: 7 September 2006
PDF: 7 pages
Proc. SPIE 6294, Infrared and Photoelectronic Imagers and Detector Devices II, 629404 (7 September 2006); doi: 10.1117/12.680495
Show Author Affiliations
Robert Rehm, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Martin Walther, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Johannes Schmitz, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Joachim Fleißner, Fraunhofer-Institut für Angewandte Festkörperphysik (Germany)
Johann Ziegler, AIM Infrarot-Module GmbH (Germany)
Wolfgang Cabanski, AIM Infrarot-Module GmbH (Germany)
Rainer Breiter, AIM Infrarot-Module GmbH (Germany)

Published in SPIE Proceedings Vol. 6294:
Infrared and Photoelectronic Imagers and Detector Devices II
Randolph E. Longshore; Ashok Sood, Editor(s)

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