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Proceedings Paper

Optical enhancement of aircraft detection using polarization
Author(s): Walter G. Egan; Michael J. Duggin
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Paper Abstract

Focal plane wideband infrared digital polarization imagery will be compared with visual wideband focal plane digital imagery of a camouflaged C-130 aircraft to show the extreme enhancement possible using digital imagery. The experimental observations will be compared with theoretical calculations and modeling results of both specular and shadowed areas. The relationship of both the specular and the shadowed areas to surface structure, orientation, specularity, roughness, shadowing, orientation and complex index of refraction will be illustrated. The imagery was obtained in four plane polarized directions with axes oriented vertically, horizontally and at plus and minus 45 degrees to the vertical. Nine locations on the aircraft were chosen (tail, fuselage, wing and propeller as well as five sky locations to establish sky background. Both sunlit and shadowed locations were examined. The direction of the dominant plane of polarization was obtained, but not the existence of circular polarization, which requires a quarter wave plate to resolve temporal coherence. Unpolarized radiation exists in the imagery,but its coherence is not evident without a phase resolving element.

Paper Details

Date Published: 15 November 2000
PDF: 7 pages
Proc. SPIE 4133, Polarization Analysis, Measurement, and Remote Sensing III, (15 November 2000); doi: 10.1117/12.406624
Show Author Affiliations
Walter G. Egan, CUNY/York College (United States)
Michael J. Duggin, SUNY/Syracuse (United States)

Published in SPIE Proceedings Vol. 4133:
Polarization Analysis, Measurement, and Remote Sensing III
David B. Chenault; Walter G. Egan; Michael J. Duggin; Michael J. Duggin; Walter G. Egan; Dennis H. Goldstein, Editor(s)

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