Infrared polarization ship images and contrast in the MAPTIP experiment

Autor:	Philip L. Walker, William J. Lentz, Alfred W. Cooper
Rok vydání:	1996
Předmět:	Physics Brewster's angle Infrared business.industry media_common.quotation_subject Polarizer Polarization (waves) law.invention symbols.namesake Optics Sky law symbols Degree of polarization Optoelectronics Rayleigh sky model business Optical filter media_common
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.254208
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::49eb106b8a049dc431c5224a3286978b https://doi.org/10.1117/12.254208 Zobrazit plný text záznamu