Method and apparatus for controlling optical output of laser lig

Details Method and apparatus for controlling optical output of laser lig Method and apparatus for controlling optical output of laser lig

1988-12-20

1990-02-06

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

372 9, H01S 300

Patent

active

048993484

ABSTRACT:
A method of controlling an optical output of a laser light source which scans a photosensitive body comprises the steps of detecting an optical output of the laser light source and generating a monitor signal which has a logic level indicative of whether a laser power of the optical output is greater than or less than a predetermined value, generating signals including a gate signal indicative of a scan time in which the photosensitive body is scanned based on a synchronization detection signal indicative of each scanning line, a laser diode signal having logic levels for turning the laser light source ON and OFF and an enable signal based on the monitor signal, the gate signal and a power set start signal indicative of a start of a power set operation in which the laser power is controlled to the predetermined value, and adjusting a driving current supplied to the laser light source based on the monitor signal when enabled by a certain logic level of the enable signal so as to control the laser power to the determined value.

REFERENCES:
patent: 4618958 (1986-10-01), Shibata et al.
patent: 4662760 (1987-05-01), Shmada et al.
patent: 4663760 (1987-05-01), Shimada
patent: 4763334 (1988-08-01), Shimada et al.

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