Light beam scanner

Details Light beam scanner Light beam scanner

1989-02-22

1990-10-30

Arnold, Bruce Y.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 75, G02F 101

Patent

active

049664433

ABSTRACT:
A light beam scanner for scanning a light beam not by using an optical part such as a rotary polygon mirror or a galvanometer but by using a phase-conjugate element (or phase-conjugate mirror) having a non-linear light effect to establish a phase conjugate beam due to four-light wave mixing. The phase-conjugate element constitutes a resonator, when irradiated with and excited by a pumping light beam, together with a reflecting face existing in its vicinity so that laser oscillations are effected inbetween. Between the phase-conjugate element and the reflecting face, there are interposed a plurality of optical gates, some of which are opened to constitute a resonator and to generate the laser oscillations and a conjugate laser beam for recording. Thus, the scanning operation can be accomplished by controlling the optical gates to be opened or closed.

REFERENCES:
patent: 4229095 (1980-10-01), Mir
patent: 4375397 (1983-02-01), Mir
patent: 4375568 (1983-03-01), Mir
patent: 4380023 (1983-04-01), Mir et al.
patent: 4755415 (1988-07-01), Iijima et al.
patent: 4849980 (1989-07-01), Shoji
Optical Phase Conjugation, Edited by R. A. Fisher Academic Press, 1983. Chap. 13; pp. 467-468.

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