Optics: image projectors – Plural projection paths with single light source
Patent
1987-05-15
1988-06-07
Miller, Stanley D.
Optics: image projectors
Plural projection paths with single light source
350402, 353 33, G02F 113, G02B 2728, G03B 2126
Patent
active
047492597
ABSTRACT:
An optical system for a full color liquid crystal light valve image projector is provided. The invention includes a first prepolarizer for separating from a first beam light of first and second colors and a first polarization state and a second prepolarizer for separating from the first beam light of a third color and a second polarization state. The resultant first beam contains light of a third color and first polarization state and light of first and second colors and second polarization state. A polarization selective beamsplitter is provided in the optical path of the first beam for transmitting, in a second beam, light in the first beam having the first polarization state and reflecting, in a third beam, light in the first beam having the second polarization state. A color selective beamsplitter is included for transmitting, in a fourth beam, light in the third beam having a first color and for reflecting, in a fifth beam, light in the third beam having a second color. In the illustrative embodiments, the invention includes first and second reflective surfaces for reflecting the second and fifth beams respectively into a parallel coplanar relation with the fourth beam. The invention permits the light valves and associated CRT assemblies to be located in a parallel coplanar relation. The present invention thereby provides a compact design for a liquid crystal light valve image projection systems.
REFERENCES:
patent: 2403731 (1943-04-01), Macneille
patent: 3501640 (1970-03-01), Harris
patent: 3925813 (1975-12-01), Toyama et al.
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4191456 (1980-03-01), Hong et al.
patent: 4422722 (1983-12-01), Higuchi et al.
patent: 4464018 (1984-08-01), Gagnon
patent: 4464019 (1984-08-01), Gagnon
patent: 4500172 (1985-02-01), Gagnon et al.
Hughes Aircraft Company
Karambelas A. W.
Lewis David
Miller Stanley D.
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