Light wedge for illuminating a platen in a print scanner

Details Light wedge for illuminating a platen in a print scanner Light wedge for illuminating a platen in a print scanner

2005-03-15

2005-03-15

Stafira, Michael P. (Department: 2877)

Optics: measuring and testing

Document pattern analysis or verification

C382S124000, C382S127000

Reexamination Certificate

active

06867850

ABSTRACT:
Light wedges that reflect light internally and produce diffuse light for uniformly illuminating a platen in a print scanner are presented. In one example, a light wedge has a first surface that receives light emitted from an illumination source and a second surface that limits specular reflections. The light wedge transmits light from the illumination source toward the platen, whereby uniform illumination is provided to the platen. In another example, a light wedge has an illumination surface that receives light emitted from the illumination source, a first surface that limits specular reflections, and a second surface that acts as a diffuser. The second surface reflects light out of the light wedge toward the platen, whereby uniform illumination is provided to the platen.

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