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Proceedings Paper

Efficient liquid crystal light valves
Author(s): William E. Glenn; Carvel E. Holton; George J. Dixon
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Paper Abstract

The optical efficiency of a liquid-crystal light-valve projector is determined by the optical design, the method of modulation and the efficiency of the light source. A projector has been built with efficient optics. This projector has been tested with polarized and unpolarized light using rotation of polarization as a modulation technique and also with unpolarized light by using a diffraction grating formed in the liquid crystal. The diffraction technique uses a Schlieren optical system. The light sources tested have been xenon arcs, metal halide arcs and efficient solid-state lasers. The optical system reduces laser speckle significantly when laser sources are used. All combinations exceeded 3 lumens per watt when compared on a white light basis. Experimental results of the combinations will be given. Heating of the panel by absorption of visible light limits the minimum panel size that can be used for a given light output. Typical values will be presented for the choice of panel size for a given light output.

Paper Details

Date Published: 7 April 1995
PDF: 16 pages
Proc. SPIE 2407, Projection Displays, (7 April 1995); doi: 10.1117/12.205892
Show Author Affiliations
William E. Glenn, Florida Atlantic Univ. (United States)
Carvel E. Holton, Florida Atlantic Univ. (United States)
George J. Dixon, CREOL/Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 2407:
Projection Displays
Ming Hsien Wu, Editor(s)

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