G - Physics – 03 – B
Patent
G - Physics
03
B
88/114, 88/52, 8
G03B 21/10 (2006.01) H04N 9/31 (2006.01)
Patent
CA 1212852
ABSTRACT The invention provides a two-channel liquid crystal light valve image projection system with prepolarization using an oil coupled optical arrangement. A prepolarizing beamsplitter is mounted in the container in optical align- ment with a first surface for splitting and prepolarizing light from a source into first and second beams having first and second polarization states, respectively. First and second dichroic separators are mounted within the container for extracting light of a first color from the first beam and light of a second color from the second beam, respectively. The separator outputs are recombined by the prepolarizing prism into a single beam which is directed to a second polarizing beamsplitter mounted within the container. The second beamsplitter splits the single beam and directs light of the first and second polarizations through the second and third apertures, respectively. Liquid crystal light valves mounted at the second and third apertures modulate the polarization state of the exiting light and return it to the second beamsplitter to be directed through the output aperture to projection optics for display.
418654
Gowling Lafleur Henderson Llp
Hughes Aircraft Company
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