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Retro-reflective scanner with return path free of collection optics

  • US 5,272,353 A
  • Filed: 06/19/1992
  • Issued: 12/21/1993
  • Est. Priority Date: 06/19/1992
  • Status: Expired due to Term
First Claim
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1. A retro-reflective electro-optical scanner for reading indicia having parts of different light reflectivity, comprising:

  • (a) means for generating and directing a light beam along an outgoing path;

    (b) a reflector mounted in the outgoing path for reflecting the light beam toward the indicia for reflection therefrom;

    (c) detector means for detecting light reflected off the indicia over a field of view in a return path free of any means for optically focusing and optically limiting said field of view, and for generating an electrical signal representative of the indicia;

    (d) said reflector also being mounted in the return path for directly receiving the reflected light from the indicia and for directly reflecting the reflected light to the detector means; and

    (e) means for moving the reflector to simultaneously scan the light beam and the field of view.

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