H - Electricity – 04 – N
Patent
H - Electricity
04
N
314/28, 88/96.8
H04N 1/04 (2006.01) G02B 26/12 (2006.01) G02B 27/00 (2006.01) H04N 1/047 (2006.01) H04N 1/113 (2006.01) H04N 1/12 (2006.01)
Patent
CA 1116226
APPARATUS AND METHOD FOR CORRECTING IMPERFECTION IN A POLYGON USED FOR LASER SCANNING Abstract of the Disclosure An electro-optical light scanning system using a modulated laser illumination source directed upon a multifaceted rotating polygonal mirror or polygon. The mirrored facets reflect the impinging light toward a moving photoreceptor and forms a raster of scan lines as the photoreceptor moves. The system incorporates sensing optics and closed loop electronics for correcting inac- curacies in the position of the reflected light resulting from deflects in the angular relationship between the plane of the facets and that of the rotating axis of the polygon. Such cor- rection is accomplished through use of selectively located re- flective and transparent surfaces wherein location of the imping- ing light may be determined.
339255
Macrae & Co.
Pitney-Bowes Inc.
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