Laser beam depicting apparatus

Details Laser beam depicting apparatus Laser beam depicting apparatus

1988-11-30

1990-11-20

Arnold, Bruce Y.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250236, 358199, 358206, 350 67, G02B 2610

Patent

active

049714139

ABSTRACT:
A laser beam depicting apparatus adapted to depict a raster image by modulating a laser beam by image data and raster-scanning the laser beam by the reflecting surfaces of a rotational polygonal mirror comprises a laser source for producing a laser beam by oscillating light components of plural wavelengths at the same time, a light modulator for modulating the laser beam without causing color dispersion, a light deflector for correcting any deviation in a direction orthogonal to the deflection of the laser beam caused by the tilting error of each reflecting surface of the rotational polygonal mirror without causing color dispersion, and an f.theta. lens having its chromatic aberration corrected for condensing the laser beam deflected by the rotational polygonal mirror in order to raster-scan an object to be depicted.

REFERENCES:
patent: 3944323 (1976-03-01), Starkweather
patent: 4180822 (1979-12-01), Hudson et al.
patent: 4270131 (1981-05-01), Tompkins et al.
patent: 4272151 (1981-06-01), Balasubramanian
patent: 4308544 (1981-12-01), Lucero et al.
patent: 4350988 (1982-09-01), Masegi
patent: 4639073 (1987-01-01), Yip et al.
patent: 4776654 (1988-10-01), Ishizuka et al.

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