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Proceedings Paper

MWIR target contrast reduction due to solar scattering
Author(s): Bjorn F. Andresen; Baruch Levy
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Paper Abstract

The use of the 3 - 5 micrometers (MWIR) spectral region for IR search and track (IRST) systems is sometimes dictated by operational and technological factors. In daytime, sun scatter from the background may cause the inherent target contrast in this band to be washed out or even reversed in polarity. This paper examines the effect of scattered sun radiation on target contrast for three types of sensor scenarios -- surface based, airborne, and space based. The analysis was carried out using the LOWTRAN 7 computer code. Critical angular relations between the sensor line-of-sight and the sun direction were identified and optimum spectral bands, based on target contrast considerations, are suggested for sensors employing InSb and PtSi detectors. A set of field measurements in a surface-based sensor scenario is presented to illustrate the sun scatter analysis.

Paper Details

Date Published: 1 November 1993
PDF: 11 pages
Proc. SPIE 2020, Infrared Technology XIX, (1 November 1993); doi: 10.1117/12.160533
Show Author Affiliations
Bjorn F. Andresen, ElOp Electrooptics Industries Ltd. (Israel)
Baruch Levy, ElOp Electrooptics Industries Ltd. (Israel)

Published in SPIE Proceedings Vol. 2020:
Infrared Technology XIX
Bjorn F. Andresen; Freeman D. Shepherd, Editor(s)

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