Scanner carriage lamp reflector and method of using same
AssigneeHewlett-Packard Company
InventorsDennis J. Schissler, Gerold G. Firl
Life of this patent
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AssigneeHewlett-Packard Company
InventorsDennis J. Schissler, Gerold G. Firl
Estimating the term…
A screen-printed reflector reflectively redirects light from a scanner bulb in a substantially uniform illumination pattern across a desired scan area of a document to be scanned. A middle or central portion of the reflector is printed with a non-reflective pattern, while the end portions of the reflector are composed of highly reflective polyester textured matte that in combination with the non-reflective pattern substantially equalizes the illumination across the desired scan area of the document being scanned. The manner of using and constructing the screen printed reflector, provides a fast and efficient method for tuning a light distribution profile to provide a sufficient light reflective pattern that compensates for non-uniform light distribution patterns produced by scanner bulbs.
A carriage unit having a cover with an elongated slot disposed therein, said slot having a sufficient length to extend across an entire horizontal dimension of a defined field of view scanning area and a sufficient width to define a document illumination area within the defined field of view scanning area and a housing having an elongated groove disposed adjacent and opposite said elongated slot, said groove having another sufficient length to extend across the entire horizontal dimension of the defined field of view scanning area, comprising:
A scanner carriage unit, comprising:
Dependencies are inferred from the claim text.