Extended resolution light deflector using surface acoustic waves

Details Extended resolution light deflector using surface acoustic waves Extended resolution light deflector using surface acoustic waves

1980-05-27

1983-01-25

Sikes, William L.

350356, G02F 111

Patent

active

043700306

ABSTRACT:
A light modulator/deflector which uses acoustic surface waves wherein an illuminating beam 10 enters the side of and strikes the active surface 18 of a transparent and electrooptic acoustic substrate 12 near the grazing angle of incidence and is reflected off that surface 18 through the remaining portion of substrate 12 and out the other side thereof into at least a zero order undiffracted direction and a first order diffracted direction. The light 10 is collimated so that it interacts with as much of the acoustic wave 20 as possible. A set of interdigital electrodes 16 is evaporated on this surface 18 so as to launch acoustic waves 20 in a direction normal to the plane of incidence of the light. Along the path of the travelling acoustic wave in the same substrate are placed one or more repeater acoustic wave sources 72, 74 to boost the decaying acoustic wave 62 back to its original power level.

REFERENCES:
patent: 3568102 (1971-03-01), Tseng
patent: 3958862 (1976-05-01), Scibor-Rylski
patent: 4004847 (1977-01-01), McNaney

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