Light deflector of acousto-optic interaction type

Details Light deflector of acousto-optic interaction type Light deflector of acousto-optic interaction type

1975-12-04

1977-07-26

Sikes, William L.

G02F 116

Patent

active

040379337

ABSTRACT:
A light deflector utilizing the anisotropic Bragg diffraction in an anisotropic medium in which the directions of the wave front normal and the energy propagation of ultrasonic waves are arranged to be different and the frequency range of the ultrasonic wave for causing re-diffraction of light diffracted once by said ultrasonic wave is set outside the driving frequency range. The diffraction efficiency does not fall near the central frequency of the driving ultrasonic frequency range due to the prevention of rediffraction. Further, the driving frequency can be selected over a remarkably wide range compared to that of the conventional light deflector.

REFERENCES:
patent: 2418964 (1947-04-01), Arenberg
patent: 3637288 (1972-01-01), Seidel
patent: 3665204 (1972-05-01), Nelson

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