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Optical device for detecting coded symbols

  • US 4,603,262 A
  • Filed: 08/22/1983
  • Issued: 07/29/1986
  • Est. Priority Date: 08/22/1983
  • Status: Expired due to Term
First Claim
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1. An optical device for detecting coded symbols having relatively more and less reflective regions which comprises means for illuminating said code symbols with a first light beam which is substantially invisible, means for simultaneously illuminating said symbols with a marker beam of light which is visible and which is coincident with said first beam to enable said first beam to be located with respect to said symbols, and means responsive to reflections of said first beam from said symbols for translating said symbols into corresponding electrical signals.

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