Infrared polarization ship images and contrast in the MAPTIP experiment

Alfred W. Cooper; William J. Lentz; Philip L. Walker

doi:10.1117/12.254208

14 October 1996 Infrared polarization ship images and contrast in the MAPTIP experiment

Alfred W. Cooper, William J. Lentz, Philip L. Walker

Proceedings Volume 2828, Image Propagation through the Atmosphere; (1996) https://doi.org/10.1117/12.254208
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Shore-based polarized infrared images of ship target and background were obtained in the MAPTIP measurement series, using vertical and horizontal polarization filters. These images have been analyzed to yield degree of polarization and polarization contrast enhancement for targets with sea and sky background Strong vertical polarization is observed in the sea surface emission near the Brewster Angle in the 8 - 12 micrometer (LWIR) band, whereas horizontal polarization due to reflection is usually dominant in the 3 - 5 micrometer (MWIR) band. Ship targets at broadside aspect show a degree of polarization less than 5%. An enhancement of contrast by up to 30% in the LWIR (less in the MWIR) is obtained by polarization suppression of sea background. The contrast enhancement in the MWIR is counteracted by the horizontal polarization of reflected sunlight.

Citation Download Citation

Alfred W. Cooper, William J. Lentz, and Philip L. Walker "Infrared polarization ship images and contrast in the MAPTIP experiment", Proc. SPIE 2828, Image Propagation through the Atmosphere, (14 October 1996); https://doi.org/10.1117/12.254208

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