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Proceedings Paper

Uncooled dual-band MWIR/LWIR optical readout imager
Author(s): Matthew Erdtmann; Lei Zhang; Guanghai Jin
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Paper Abstract

Agiltron has demonstrated an uncooled dual-band MWIR/LWIR imager based on our previously reported photomechanical sensor technology. The readout from two separate MWIR and LWIR photomechanical sensor arrays were fused together, permitting either dual-band, MWIR-only, or LWIR-only operation of the imager. Results of the dual-band imager in response to a wide-dynamic range infrared scene are described. With the dual-band MWIR/LWIR capability, the full dynamic range of the scene was successfully captured, yet good sensitivity was still maintained when imaging near-room temperature objects. Extensive comparative performance analysis was performed for the photomechanical thermal imager and HgCdTe and InSb photon imagers. A noise model for the optical readout photomechanical thermal imager is presented. It is shown that the photomechanical pixel can be engineered to nullify the contribution of shot noise to NETD without affecting the thermal properties of the pixel. In this regime, the performance of the uncooled photomechanical imager will approach that of cooled photon imagers.

Paper Details

Date Published: 16 April 2008
PDF: 11 pages
Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 694012 (16 April 2008); doi: 10.1117/12.781886
Show Author Affiliations
Matthew Erdtmann, Agiltron, Inc. (United States)
Lei Zhang, Agiltron, Inc. (United States)
Guanghai Jin, Agiltron, Inc. (United States)

Published in SPIE Proceedings Vol. 6940:
Infrared Technology and Applications XXXIV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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