Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1994-10-28
1998-10-06
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347259, 358481, B41J 247, G01D 1534, G02B 2600, G02B 2700
Patent
active
058185070
ABSTRACT:
An apparatus and method for controlling the modulation of an exposing beam of a rotating polygon type image forming apparatus using control marks formed on a rotating surface portion of a polygon member or a motor polygon assembly. The control marks are read by a reader during rotation of the polygon member, and the information read from the control marks is used to control the modulation of the exposing beam of the image forming apparatus to expose evenly spaced, uniformly sized, precisely oriented, geometrically straight scan lines of pixels on a photosensitive member. The control marks can include pixel clock information, intensity correction information, error correction information about individual facets of the polygon member, and motor speed control information.
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Urbach, John; Fisli, Tibor; Starkweather, Gary, "Laser Scanning for Scanning for Electronic Printing," Proceedings of the IEEE, vol. 70, No. 6, Jun. 1982.
Gordon Raquel Yvette
Le N.
Xerox Corporation
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