Optical beam deflection system

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350385, 350 9614, G02F 103

Patent

active

044390165

ABSTRACT:
The invention comprises a system for deflecting an optical beam in response to an electrical signal. A collimated optical beam is generated utilizing any convenient means. The collimated light beam is injected into an optical wave guide positioned between two electrodes. One electrode is substantially coextensive with the surface of the waveguide. The second electrode comprises a series of spaced stripes parallel to the optical beam and having varying length across the surface of the electro-optically sensitive material. The electro-optically sensitive material is subjected to a varying electrical field by applying an electrical voltage to the electrodes causing the velocity of propagation of the light through the electro-optically sensitive material to vary across the layer. This changes the phase relationship of the optical beam across its diameter as it emerges from the edge of the electro-optically sensitive material. This results in a deflection of the electro-optical beam. Beam positioned detection means detects the position of the optical beam as deflected and correlates the beam position with the magnitude of the deflection voltage.

REFERENCES:
patent: 3655261 (1972-04-01), Chang
patent: 3874782 (1975-04-01), Schmidt
patent: 3904270 (1975-09-01), Cheo
patent: 3924931 (1975-12-01), Cheo
patent: 4039249 (1977-08-01), Kaminow et al.
patent: 4185274 (1980-01-01), Giallorenzi
patent: 4348075 (1982-09-01), Gottlieb et al.
Meyer; "Optical Beam Steering Using a Multichannel Lithium Tantalate Crystal"; App. Opt., vol. 11, No. 3, Mar. 1972.
Hammer; "Digital Electro-Optical Grating Deflector and Modulator"; App. Phys. Lett., vol. 18, No. 4, Feb. 15, 1971.

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