Scanning optical apparatus having focus position adjusting means

Details Scanning optical apparatus having focus position adjusting means Scanning optical apparatus having focus position adjusting means

1991-09-04

1992-06-16

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358494, H01J 314

Patent

active

051226588

ABSTRACT:
A scanning optical apparatus includes a light source, a modulator for intermittently modulating a beam from the light source or for modulating it in amplitude, imaging device for imaging the beam from the light source at predetermined position, a deflector for deflecting the beam from the light source in a predetermined direction, a photoreceptor for receiving the beam deflected by the deflector and modulated by the modulator, processing for processing a signal produced by the photoreceptor, and an adjusting device, responsive to the processing device, for adjusting an imaging position of the beam by the imaging device.

REFERENCES:
patent: 4205350 (1980-05-01), Gunning
patent: 4206348 (1980-06-01), Davy et al.
patent: 4310757 (1982-01-01), Check, Jr. et al.
patent: 4386272 (1983-05-01), Check, Jr. et al.
patent: 4660094 (1987-04-01), Yoshimoto et al.
patent: 4674825 (1987-06-01), Tateoka et al.
patent: 4809753 (1989-02-01), Noguchi
English language translation of Japanese 57-44111.

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