Optics: measuring and testing – Document pattern analysis or verification
Reexamination Certificate
2005-10-11
2005-10-11
Stafirn, Michael P. (Department: 2877)
Optics: measuring and testing
Document pattern analysis or verification
C382S124000, C382S127000
Reexamination Certificate
active
06954260
ABSTRACT:
Systems and methods for illuminating a platen are provided. A hybrid illumination system uses both diffusion and collimation to efficiently provide a flat, uniform illumination at a platen. One or more diffusers are disposed between the illumination source array and a collimating lens. An illumination system is provided which uses diffused light to illuminate a platen in a print scanner. The illumination system has an illumination source array and a light wedge. The light wedge reflects light internally which makes the illumination even more diffuse. An illumination source array has a plurality of sources that emit blue/green light. In one preferred example, the blue/green light is equal to or approximately equal to 510 nm. Sources are divided into at least a center region and a perimeter region. The density of sources provided in the perimeter region is greater than in the center region to correct for natural light falloff in the illumination system. Intensity control can be preformed individually or in groups.
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Arnold Joseph F.
Carver John F.
Francis Trent G.
Irving Richard D.
McClurg George W.
Cross Match Technologies, Inc.
Stafirn Michael P.
Sterne, Kessler, Goldstein & Fox P.L.LC.
Valentin II Juan D
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