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2002 | 101 | 1 | 189-200
Article title

Characterization of the Liquid Crystal Display Modulation. Optimization for Some Applications

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EN
Abstracts
EN
In this paper we revise recent results of our team in the optimization of twisted nematic liquid crystal displays to be used as spatial light modulators for image processing and diffractive optics. In general two kind of responses are desired for the mentioned applications: amplitude-only and phase-only modulations. However, it is not a trivial task to find the polarization configurations for which these responses are obtained. We show that a reverse-engineering approach is needed to optimize the liquid crystal display response. According to this reverse-engineering approach the modulation characteristics can be calibrated by evaluating the modulation response in a few polarization configurations. These results are used to fit the liquid crystal display behavior to a simplified physical model, which uses two modulation parameters. We demonstrate that the degree of accuracy of this model is very high, thus enabling the prediction of the modulation behavior of the display at other polarization configurations. Therefore, we can perform computer searches for the optimum orientation of the polarizing elements to obtain the required optical transmission. We demonstrate the need to use short wavelengths and the need to insert wave plates in front and behind the liquid crystal displays to obtain either amplitude-only or phase-only regime.
Keywords
EN
Year
Volume
101
Issue
1
Pages
189-200
Physical description
Dates
published
2002-01
received
2001-06-28
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv101n114kz
Identifiers
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