1 January 2005 Phase-modulating bistable optically addressed spatial light modulators using wide-switching-angle ferroelectric liquid crystal layer
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Optical Engineering, 44(1), 014003 (2005). doi:10.1117/1.1828471
Abstract
We report the use of an experimental ferroelectric liquid crystal material called CDRR8 in bistable optically addressed spatial light modulators for both amplitude- and phase-modulating devices. First, the methods used to improve the alignment and obtain truly bistable switching with CDRR8 are described. The diffraction efficiency and switching characteristics of a bistable CDRR8 optically addressed spatial light modulator used as an amplitude-modulating device and then as a phase-modulating device for encoding high-resolution patterns are compared. The CDRR8 devices exhibit bistability when driven by alternating monopolar pulses. The results show that the use of a device as a phase-modulating rather than an amplitude-modulating device, increases the diffraction efficiency by 10 times. Resolution is better than 100 lp/mm, as measured by the fall in diffraction efficiency by 50% compared with the diffraction efficiency at low spatial frequencies.
Solon Mias, Ilias Manolis, Neil Collings, Timothy David Wilkinson, William A. Crossland, "Phase-modulating bistable optically addressed spatial light modulators using wide-switching-angle ferroelectric liquid crystal layer," Optical Engineering 44(1), 014003 (1 January 2005). http://dx.doi.org/10.1117/1.1828471
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KEYWORDS
Optically addressed spatial light modulators

Diffraction

Switching

Phase modulation

Liquid crystals

Amplitude modulation

Binary data

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