Converging optics for a single light valve full-color projector
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Jul 10, 1997
filing date -
Jul 10, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A light valve image projection system (10) wherein the optical registration of individual primary color images on a projection screen (14) is substantially immune to modification of the projection throw distance is disclosed herein. The inventive light valve projection system (10) is operative to project a composite optical image onto the screen (14), and includes an optical light valve apparatus (18, 19, 20) for generating first and second optical images. A converging optical system (22), in optical alignment with one or more light valves (20), is disposed to overlap the first and second images into a composite image along an optical axis. The projection system (10) of the present invention further includes a projection lens (24) for illuminating the screen (14) with the composite image.
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