Light valve projector apparatus and technique

Optics: image projectors – Composite projected image – Multicolor picture

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Details

353 34, 353 37, 349 8, 349201, 359566, 359569, 348750, G03B 2100

Patent

active

060862084

ABSTRACT:
A method is disclosed for displaying images represented by electronic image information, including the following steps: providing a light source; optically modulating light from the light source, the optical modulation utilizing a pixel pattern and a diffraction grating, the pixel pattern being modulated with the image information; providing a schlieren optical system for operating on the optically modulated light; and displaying an output of the schlieren optical system; the diffraction grating being provided with a grating spacing that differs from the pixel spacing of the pixel pattern by an odd multiple of half the grating spacing.

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W.E. Glenn, C.E. Holton, G.J. Dixon, and P.J. Bos, "High Efficiency Light Valve Projectors and High Efficiency Laser Light Sources", Presented at the 137th SMPTE Technical Conference in New Orleans Sep. 6-9, 1995.
W. Glenn, C. Holton, G. Dixon, "Efficient Liquid Crystal Light Valves", Society Of Photo-Optical Instrumentation Engineers, 1995.

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