Infrared polarization measurements of ship signatures and background contrast

Alfred W. Cooper; William J. Lentz; Philip L. Walker; Petrus M. Chan

doi:10.1117/12.177924

15 June 1994 Infrared polarization measurements of ship signatures and background contrast

Alfred W. Cooper, William J. Lentz, Philip L. Walker, Petrus M. Chan

Proceedings Volume 2223, Characterization and Propagation of Sources and Backgrounds; (1994) https://doi.org/10.1117/12.177924
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

In previous papers we have presented measurements of degree of polarization in the mid and far infrared both in near-horizon sun-glint and in the adjacent sea background radiance. The polarization has been related to the Fresnel reflection and emission coefficients and compared with predictions. These measurements have been extended to include target-to-background polarization contrast measurements. Target polarization was small, but sea surface emission showed moderate degree of polarization in the p-plane (vertical). Considerable ship- background contrast improvement was achieved by polarization filtering in the horizontal plane. This effect was greater in the far infrared. Values are given for the degree of polarization of target and background and the contrast improvement factor due to polarization filtering.

Citation Download Citation

Alfred W. Cooper, William J. Lentz, Philip L. Walker, and Petrus M. Chan "Infrared polarization measurements of ship signatures and background contrast", Proc. SPIE 2223, Characterization and Propagation of Sources and Backgrounds, (15 June 1994); https://doi.org/10.1117/12.177924

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