Real time image subtraction with a single liquid crystal light valve
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United States of America Patent
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Nov 17, 1987
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N/A
app pub date -
Jan 30, 1986
filing date -
Jan 30, 1986
priority date (Note) -
Expired
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Abstract
A technique for subtracting images in real time utilizing a single liquid crystal light valve (LCLV) is described. The two images are projected on the LCLV through a common grating in a well-determined geometry. The interrogating light beam is optically filtered, so that only different features in the two images are revealed.
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