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Optical Engineering

Origin and characteristics of ambiguous properties in measuring physical parameters of twisted nematic liquid crystal spatial light modulators
Author(s): Makoto Yamauchi
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Paper Abstract

Twisted nematic liquid crystal spatial light modulators have been widely used for such applications as optical information processing and real-time holography. It is important to experimentally determine the physical parameters of the modulators to control their modulation characteristics. The parameters are usually calculated from a set of measured intensity transmittances. We mathematically prove that the calculation always suffers from ambiguities, and there exist two distinct origins. Neglecting absolute phase is one source of ambiguity; the other relates to the quasisinusoidal dependence of the complex amplitude transmittance on the parameters. Jones matrix formalism is used to analyze the ambiguity, and interesting examples are presented.

Paper Details

Date Published: 1 May 2002
PDF: 8 pages
Opt. Eng. 41(5) doi: 10.1117/1.1466851
Published in: Optical Engineering Volume 41, Issue 5
Show Author Affiliations
Makoto Yamauchi, AIST (Japan)

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