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Proceedings Paper

Characterization of an analog ferroelectric spatial light modulator: application to dynamic diffractive optical elements and optical information processing
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Paper Abstract

Spatial light Modulators (SLM) are key devices for the development of optical information processors. Low cost twisted nematic liquid crystal (TN-LC) SLM's are widely available and their characteristics have been extensively studied. Beside the fact that they exhibit a coupled amplitude and phase modulation, their speed is limited to approximately the video frame rate. An alternative to TN-LC devices can be the use of analog ferroelectric liquid crystal (FLC) devices. These devices now commercially available produce a gray level pure amplitude modulation at typical frame rates of 1 kHz. In order to determine its coding capabilities and its limitations, the characterization of such a device, manufactured by Boulder Nonlinear Systems Inc., is presented in this paper. This SLM has a resolution of 512 by 512 pixels with a pitch of 15 μm and has a reflective VLSI backplane. The study of its potential applications for the display of dynamic diffractive optical elements and also as a component of an optical processor for pattern recognition will be followed by experimental results and comparisons with TN­LC devices.

Paper Details

Date Published: 30 November 2001
PDF: 29 pages
Proc. SPIE 10302, Optoelectronic Information Processing: Optics for Information Systems: A Critical Review, 103020I (30 November 2001); doi: 10.1117/12.449680
Show Author Affiliations
Pierre Ambs, Univ. de Haute-Alsace (France)
Laurent Bigue, Univ. de Haute-Alsace (France)


Published in SPIE Proceedings Vol. 10302:
Optoelectronic Information Processing: Optics for Information Systems: A Critical Review

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