Prism assembly for a single light valve full-color projector

Details Prism assembly for a single light valve full-color projector Prism assembly for a single light valve full-color projector

1985-09-12

1987-09-01

Frankfort, Charles

Optics: image projectors

Composite projected image

Multicolor picture

353 99, 350331R, 350337, G02F 113

Patent

active

046905260

ABSTRACT:
A prism assembly for a single light valve, full-color projector is disclosed. The prism assembly is adapted to polarize and separate the white illumination light into the three primary colors. Three separate input images corresponding to the information for the red, green and blue components of the full image are applied to separate regions of the light valve photoresponsive layer. The prism assembly comprises three channels, one for each of the primary colors. Each channel polarizes the illumination light into P-polarized colored light which is reflected onto the region of the light valve corresponding to the respective input image. The illumination light in each channel is reflected by the respective region of the light valve as respective beams each including an image bearing component of one polarization state and a second beam component of the opposite polarization state. The respective image bearing components are separated from the second components by respective analyzers and are passed into a periscope and projection lens assembly to converge the three separate images at a projection aperture.

REFERENCES:
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4150396 (1979-04-01), Hareng et al.
patent: 4425028 (1984-01-01), Gagnon et al.
patent: 4461542 (1984-07-01), Gagnon
patent: 4552441 (1985-11-01), Dewey

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