Light modulator employing electrooptic crystals
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United States of America Patent
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Apr 12, 1983
Grant Date -
N/A
app pub date -
Mar 20, 1980
filing date -
Mar 20, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrooptic light modulator is constructed from a pair of subassemblies each comprising a lithium tantalate crystal fixed between two rigid, conductive electrodes. Such subassemblies may be individually tested to ensure the selection of a pair of crystals which are matching in thermal and electrical responses. The modulator construction is completed by arranging the selected subassembly pair with crystal optic axes in orthogonal relationship in order to negate the effects of natural crystal birefringence, and fixing the subassemblies between a pair of rigid pole pieces which, together with the electrodes, serve as heat sinks to moderate the effect of thermal fluctuations, and further stabilize the assembly against mechanical and piezoelectric perturbations.
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