Light scanning recording device

Details Light scanning recording device Light scanning recording device

1988-08-08

1989-08-15

Groody, James J.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358296, 358412, 358494, 271265, H04N 104, H04N 112

Patent

active

048580198

ABSTRACT:
A modulated light beam is deflected by a light deflector to scan a recording medium in a main scanning direction while the recording medium is being fed through a feed path in an auxiliary scanning direction. The light beam is applied during intervals before and after the recording medium is scanned by the modulated light beam. The light beam deflected during the intervals is detected across the feed path by a light detector. A scanning period in which the recording medium is scanned by the modulated light beam is detected based on a change in an output signal from the light detector due to the presence of the recording medium in the feed path between the light detector and the light deflector. The speed of feed of the recording medium in the auxiliary scanning direction by counting pulses of a reference clock signal during the detected scanning period.

REFERENCES:
patent: 4356516 (1982-10-01), Koguchi
patent: 4566043 (1986-01-01), Tamura
patent: 4566903 (1985-12-01), Blitchington et al.

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