Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
2005-10-04
2005-10-04
Lee, Cheukfan (Department: 2622)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S474000, C358S475000, C358S463000, C358S464000
Reexamination Certificate
active
06952293
ABSTRACT:
A document-backing surface for reducing show-through when a duplex-printed document is scanned but without producing undesirable artifacts. The document-backing surface has a plurality of first and second light-absorbing surfaces, and a plurality of specularly reflective surfaces partially covering each of the second light-absorbing surfaces. The first specularly reflective surfaces are oriented to reflect light from a scanner lamp to a scanner sensor. In an alternate embodiment, the document-backing surface is partially covered by a specularly reflective surface oriented to reflect light from the scanner lamp to the scanner lens. In another embodiment, the document-backing surface has a set of teeth, each of which has light-absorptive first and second tooth surfaces and a specularly reflective surface partially covering each second tooth surface. In addition, the present invention is directed to a method for using a document-backing surface.
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Unknown Textbook, Chapter 41: Illumination and Color, pp. 644-658.
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Law Office of Karen Dana Oster
Lee Cheukfan
Sharp Laboratories of America Inc.
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