Piezo-optic, total internal reflection modulator
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United States of America Patent
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Mar 17, 1981
Grant Date -
N/A
app pub date -
Feb 21, 1979
filing date -
Feb 21, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezo-optical light modulator comprising an interaction medium and a transducer on one face of, and in optical isolation from, the interaction medium. Electrical signals are applied to create a periodic alternating strain field within the transducer. This field is transmitted into the interaction medium to create a shallow strain diffraction grating at a modulating surface. A light beam is projected so as to undergo a total internal reflection at this modulating surface, a portion of the light being selectively diffracted out of the incident beam.
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