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Two-dimensional CMOS sensor array to image documents and other flat objects

  • US 8,542,412 B2
  • Filed: 07/13/2009
  • Issued: 09/24/2013
  • Est. Priority Date: 04/08/2004
  • Status: Expired due to Fees
First Claim
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1. A flatbed scanner, comprising:

  • a housing;

    a transparent platen atop the housing comprising an area for imaging, the area for imaging receiving an object to be scanned;

    a first stationary lighting source and a second stationary lighting source housed within the housing and fixed relative to the transparent platen, wherein the first stationary lighting source is configured to generate light that overlaps light generated from the second stationary lighting source to illuminate the area for imaging;

    a stationary photodetector array housed within the housing and fixed relative to the transparent platen, wherein the first and second stationary lighting sources are fixed on opposing sides of the stationary photodetector array; and

    optics that direct light reflected from the entire object to the stationary photodetector array;

    wherein the optics and stationary photodetector array are configured to receive the reflected light from the entire object at once in order to image the entire object simultaneously;

    wherein both the first stationary lighting source and the second stationary lighting source are configured to remain stationary throughout a duration of the optics and the stationary photodetector receiving the reflected light in order to image the entire object; and

    wherein the first stationary lighting source and the second stationary lighting source are configured to face the transparent platen such that a plane defined by the first stationary light source and the second stationary light source is parallel to a plane defined by the transparent platen.

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