Voltage-biased liquid crystal optical power limiter
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United States of America Patent
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Aug 9, 1988
Grant Date -
N/A
app pub date -
Jan 21, 1986
filing date -
Jan 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A light detector (10) comprising a detector cell (12); a system for focusing light (14, 16, 18) on the cell; a liquid crystal (22) positioned in the light path; the liquid crystal (22) being prepared so that it passes light along the light path in the normal operating range of the detector cell (12) and directs light away from the light path when a threshold intensity of light is reached; and source of bias (24) across the crystal to enhance the recovery of the crystal (22).
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