Simultaneous 4-Stokes Parameter Determination Using A Single Digital Image
Patent, Filed 13 Apr 2004, patented 6 Feb 2007
TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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A method for determining and displaying polarization profiles of points in a scene from a single imaging detector array, which utilizes a filter system comprised of a retarder, four linear polarizers, four lenses, a color filter, camera lens and CCD video camera. Light from points in a scene are transmitted through the system and exits with attenuated intensities unique for each wavelength of the light. A narrowband color filter selects the wavelength of interest. The four lenses in the system produce four images of the scene, which are recorded as a single CCD-image. The attenuated intensities in each of the four scene-images are used to calculate the Stokes parameters for selected points in the scene for the selected wavelength. A unique pseudo-color scheme that utilizes the Poincare sphere is used for encoding and displaying polarization parameters.