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Optical Engineering

Ambiguities in measuring the physical parameters for twisted-nematic liquid crystal spatial light modulators
Author(s): Jeffrey A. Davis; David B. Allison; Kevin D'Nelly; Michael L. Wilson; Ignacio Soriano Moreno
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Paper Abstract

There is great interest in using commercially available twisted-nematic liquid crystal displays as programmable spatial light modulators. Proper use of such displays, particularly as phase-only filters for optical correlators or as diffractive optical elements, requires knowledge of the physical parameters of the device including the twist angle, the birefringence, and the orientation of the director axes. A simple experimental technique was published for evaluation of these parameters. When we used this technique, however, we found a number of different sets of values that satisfied the experimental data. We demonstrate that additional measurements at different wavelengths can resolve these ambiguities and provide valuable information about the wavelength dependence ofthe birefringence.

Paper Details

Date Published: 1 April 1999
PDF: 5 pages
Opt. Eng. 38(4) doi: 10.1117/1.602113
Published in: Optical Engineering Volume 38, Issue 4
Show Author Affiliations
Jeffrey A. Davis, San Diego State Univ. (United States)
David B. Allison, San Diego State Univ. (United States)
Kevin D'Nelly, San Diego State Univ. (United States)
Michael L. Wilson, San Diego State Univ. (United States)
Ignacio Soriano Moreno, Univ. Miguel Hernandez (Spain)

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