Accession Number:

ADD020350

Title:

System for Determining Stokes Parameters

Descriptive Note:

Patent, Filed 20 Jun 2005, Patented 25 Sep 2007

Corporate Author:

TACOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI

Personal Author(s):

Report Date:

2007-09-25

Pagination or Media Count:

14.0

Abstract:

A system for determining polarization profiles of points in a scene from video frames using Stokes parameters includes a scene having a region that emits scene light rays that correspond to the points in the scene, a color filter, a Stokes filter that includes a rotating retarder having angular positions Omega, and a first linear polarizer having a transmission axis, a correlator that emits a correlator light ray, and that comprises a uniform light source, a second linear polarizer, and a fixed retarder, a video camera having a video frame, and a computer system. The scene light rays and the correlator light ray are substantially simultaneously transmitted through the color filter and the Stokes filter to the video camera, images corresponding to the scene light rays and the correlator light ray are projected onto respective pixels in the video frame and recorded as two-dimensional 2-D arrays, and when the transmission axis of the first linear polarizer is fixed, the images corresponding to the scene light rays and the correlator light ray from four unique ones of the angular positions Omega of the rotating retarder are used by programming in the computer system to calculate respective Stokes parameters of the points in the scene.

Subject Categories:

  • Optics
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE