Method of inputting signals to light modulator and simultaneous

Details Method of inputting signals to light modulator and simultaneous Method of inputting signals to light modulator and simultaneous

Filed on

1991-03-26

Date issued

1992-07-21

Examiner

LaRoche, Eugene R.

Patent Class

Optical: systems and elements

SubClass

Optical modulator

SubSubClass

Light wave temporal modulation

Other Related Categories

359305, 359312, 359123, 346108, G02F 111, G02F 133, H04J 400, G01D 942

Type

Patent

Status

active

Patent number

051328348

Description

ABSTRACT:
Disclosed herein is a method of mixing together a plurality of inputted high-frequency signals whose frequency intervals are equal to each other so as to input the thus-mixed high-frequency signals to a multi-frequency acousto-optic device for dividing incident laser beams with the density according to the amplitude of each of the inputted high-frequency signals and in the direction corresponding to the frequency of each inputted high-frequency signal so as to radiate the thus-divided laser beams therefrom. The high-frequency signals whose frequencies are free from being adjacent to each other are mixed together, and the thus-mixed high-frequency signals are further mixed into one, thereby inputting the mixture to the acousto-optic device. Since the frequencies of high-frequency signals to be mixed first are not adjacent from each other, third-order harmonic signals appear at positions where they are dispersed. It is therefore possible to suppress the influence of third-order harmonic distortion upon the density of an image to the utmost.

REFERENCES:
patent: 3935566 (1976-01-01), Snopko
patent: 4336981 (1982-06-01), Mori
patent: 4432613 (1984-02-01), Ueda et al.
patent: 4444470 (1984-04-01), Ioka et al.
patent: 4799777 (1989-01-01), Edouard et al.
patent: 4882775 (1989-11-01), Coleman
patent: 5079568 (1992-01-01), Shinada

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