Flying spot scanner with scan detection

Details Flying spot scanner with scan detection Flying spot scanner with scan detection

1977-02-25

1978-04-11

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Recording apparatus

358302, 358293, 350 67, 350190, 346108, H04N 104, H04N 576

Patent

active

040841979

ABSTRACT:
A flying spot scanning system is provided by utilizing reflected light from a multifaceted rotating polygon which is then directed to the scanned medium. A light source illuminates at least one of the facets of the polygon during each scanning cycle to provide a scanning beam of light. In each scanning cycle, information is transmitted to the scanned medium by modulating the light from the light source in accordance with a video signal. A first cylindrical lens is employed in convolution with other optical elements to focus the scanning beam to a spot in a focal plane at the surface of the medium. Start of scan detection is provided for the synchronization of the scanning cycles by means apart from the scan width on the medium. A portion of the beam at the start of scan position is deflected to impinge upon a second cylindrical lens which focuses the deflected beam to a spot received by a detector element.

REFERENCES:
patent: 2844648 (1958-07-01), Rosenthal
patent: 3574469 (1971-04-01), Emerson
patent: 3597536 (1971-08-01), Fowler
patent: 3646568 (1972-02-01), Woywood
patent: 3701999 (1970-08-01), Congleton
patent: 3750189 (1973-07-01), Fleischer
patent: 3867571 (1975-02-01), Starkweather
patent: 4040096 (1977-08-01), Starkweather
"Laser Raster Scanner with Separated Incident and Reflected Beams;" by D. H. McMurtry; IBM Tech. Disc. Bul.; vol. 14, No. 8, Jan., 1972, pp. 2460-2461. .
"Laser Raster Scanner;" by M. R. Latta; IBM Tech. Disc. Bul.; vol. 13, No. 12, May, 1971; pp. 3879-3880.
"Optical Deflector For Non Impact Printing;" by Brown et al; IBM Tech. Disc. Bul.; vol. 13, No. 3, Aug. 1970; pp. 643-644.

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