Optical polarization switch and method of using same
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United States of America Patent
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Feb 22, 2000
Grant Date -
N/A
app pub date -
Oct 9, 1997
filing date -
Oct 9, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved optical polarization switch which provides a wide field-of-view and achromatic action. Two liquid crystal cells are used and are selectively operated in a preferred embodiment to provide three distinct optical states. Interposed between the two nematic liquid crystal cells is a compensating member such as an half-wave retarder or an optical rotator. Such switches are of utility in shutter applications and in high-performance field-sequential color filters.
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