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Optical code readers with holographic optical elements

  • US 20020148900A1
  • Filed: 04/13/2001
  • Published: 10/17/2002
  • Est. Priority Date: 04/13/2001
  • Status: Active Grant
First Claim
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1. An optical code reading system comprising:

  • a photo sensor employing an array of cells for producing electrical signals responsive to an image directed to said sensor;

    an optical system for focusing images corresponding to at least two fields of view which do not completely overlap, the optical system including at least one electrically switchable holographic optical element for switching between said fields of view;

    means for electrically controlling said electrically switchable holographic optical element to switch between the fields of view; and

    means for decoding data from the electrical signals corresponding to an optical code symbol contained in at least one of the images focused on the photo sensor.

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