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Optical Engineering

Acousto-optic tunable filter-based visible-to-near-infrared spectroploarimetric imager
Author(s): Neelam Gupta; Rachid Dahmani; Steven J. Choy
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Paper Abstract

A compact, lightweight, robust, and field-portable spectropolarimetric imager is developed to acquire spectropolarimetric images both in the laboratory and outdoors. This imager uses a tellurium dioxide (TeO2) acousto-optic tunable filter (AOTF) as an agile spectral selection element and a nematic liquid-crystal variable retardation (LCVR) plate as a tunable polarization selection device with an off-the-shelf charge- coupled device (CCD) camera and optics. The spectral range of operation is from 400 to 800 nm with a 10-nm spectral resolution at 600 nm. Each spectral image is acquired with two retardation values corresponding to the horizontal and vertical incident polarizations. The operation of the imager and image acquisition is computer controlled. We describe the instrument and its operation and present results of our measurements.

Paper Details

Date Published: 1 May 2002
PDF: 6 pages
Opt. Eng. 41(5) doi: 10.1117/1.1467936
Published in: Optical Engineering Volume 41, Issue 5
Show Author Affiliations
Neelam Gupta, Army Research Lab. (United States)
Rachid Dahmani, Army Research Lab. (United States)
Steven J. Choy, Army Research Lab. (United States)


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