Video clock signal generator in an optical scanner in which a ma

Details Video clock signal generator in an optical scanner in which a ma Video clock signal generator in an optical scanner in which a ma

1994-04-28

1995-08-29

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Facsimile measuring, testing, or calibrating

358474, 358480, 358494, 250236, 250237R, H04N 1047, H04N 1113

Patent

active

054465567

ABSTRACT:
A video clock signal generator comprises: means for supplying a light beam; a mask having opposite ends spaced by a predetermined distance; a vibration scanner for reflecting the light beam and forming a light spot vibrating on the mask beyond the opposite ends thereof; a detector for generating an output signal representing optical information from the mask; a counter for counting a time required for the light spot to cross the opposite ends of the mask based on the output signal of the detector; and a control unit for controlling an amplitude of the scanner mirror in accordance with the time counted by the counter.

REFERENCES:
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patent: 4600951 (1986-07-01), Blitchington
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patent: 4700066 (1987-10-01), Horikawa
patent: 4761660 (1988-08-01), Lee
patent: 4962431 (1990-10-01), Imakawa et al.
Patent Abstracts of Japan, vol. 5, No. 179 (E-82), Nov. 17, 1981.
Patent Abstracts of Japan, vol. 4, No. 21 (E-172) 21 Feb. 1980.

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