Laser beam recording apparatus

Details Laser beam recording apparatus Laser beam recording apparatus

1992-12-09

1994-02-01

Epps, Georgia Y.

Coherent light generators

Particular beam control device

Scanning

372 29, 372 26, 372 31, 372 38, H01S 310

Patent

active

052837939

ABSTRACT:
A laser beam recording apparatus is provided with a semiconductor laser for producing a laser beam, and a beam scanning system for scanning the laser beam on a photosensitive material. A laser operation control circuit produces a light emission level instructing signal corresponding to an image signal and controls a drive current for the semiconductor laser over a natural light emission region and a laser oscillation region on the basis of the light emission level instructing signal, thereby to modulate the intensity of the laser beam. A device superimposes a radio-frequency current upon the drive current for the semiconductor laser only in a region in which the drive current exceeds a predetermined value.

REFERENCES:
patent: 4849980 (1989-07-01), Shoji et al.

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