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

Facsimile and static presentation processing – Facsimile – Facsimile measuring – testing – or calibrating

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

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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:
patent: 4044248 (1977-08-01), Glassman
patent: 4204233 (1980-05-01), Swager
patent: 4212018 (1980-07-01), Ohnishi et al.
patent: 4584612 (1986-04-01), Ono
patent: 4600951 (1986-07-01), Blitchington
patent: 4638156 (1987-01-01), Horikawa et al.
patent: 4661699 (1987-04-01), Welmers et al.
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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