Galvanometric optical scanning system having synchronization pho

Details Galvanometric optical scanning system having synchronization pho Galvanometric optical scanning system having synchronization pho

1987-06-23

1989-01-24

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 66, 350 691, 358293, H01J 314

Patent

active

048002712

ABSTRACT:
A galvanometric optical scanning system is disclosed. In order to compensate errors in phase, zero drift etc., at least two synchronization photodetector means are provided in an optical path of scanning beam of light. The pulses produced by the photodetector means are processed to generate correction signals for various commpensations.

REFERENCES:
patent: 4214154 (1980-07-01), Sato
patent: 4350988 (1982-09-01), Masegi
patent: 4686363 (1987-08-01), Schoon
patent: 4700066 (1987-10-01), Horikawa

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