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Image sensor based optical reader

  • US 8,474,722 B2
  • Filed: 01/31/2011
  • Issued: 07/02/2013
  • Est. Priority Date: 10/04/1999
  • Status: Expired due to Term
First Claim
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1. An optical reader for reading target indicia, said optical reader comprising:

  • an imaging subsystem including an image sensor and a lens assembly for focusing light on said image sensor;

    a control circuit in communication with said imaging subsystem; and

    a multiple color emitting illumination subsystem for directing light toward a target, said illumination subsystem being in communication with said control circuit, said illumination subsystem comprising at least two independently drivable light emitting elements;

    wherein said control circuit is adapted to sense a condition present relative to said target, and wherein said control circuit is further adapted to change a color emitted by said illumination subsystem in response to a sensed condition, said sensed condition being a sensed reader-to-target distance.

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