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Graphical code reader having illumination LEDs of different wavelengths

  • US 7,036,735 B2
  • Filed: 01/21/2004
  • Issued: 05/02/2006
  • Est. Priority Date: 01/21/2004
  • Status: Active Grant
First Claim
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1. A graphical code reader, comprising:

  • an infrared light-emitting diode;

    a red light-emitting diode;

    an image sensor;

    a lens positioned to focus reflected light on the image sensor;

    a processor;

    memory in electronic communication with the processor; and

    instructions stored in the memory, the instructions being executable by the processor to implement a method comprising;

    illuminating the infrared light-emitting diode at an infrared illumination intensity level;

    illuminating the red light-emitting diode at a red illumination intensity level;

    capturing a digital image for processing, the digital image being an electronic representation of an optical image formed on the image sensor; and

    processing the digital image to attempt to decode a graphical code within the digital image,wherein the graphical code reader is configured such that the user can set the infrared illumination intensity level and the red illumination intensity level.

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