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Automated holographic optical recognition and decoding system for verification

  • US 5,432,329 A
  • Filed: 11/25/1992
  • Issued: 07/11/1995
  • Est. Priority Date: 02/07/1992
  • Status: Expired due to Term
First Claim
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1. A security document comprising;

  • a carrier;

    a primary optical image provided on said carrier, said primary optical image adapted to define a first set of coded, machine readable data, wherein said primary optical image comprises a hologram of a bar code coding a numerical digit; and

    an optical clock affixed to said carrier, said optical clock comprising a reference image formed as a periodic pattern on said carrier, whereby said optical clock is adapted to initialize a data reading terminal to accurately read said coded, machine readable data, wherein said primary optical image and said optical clock comprise preset information defining a preset optical arrangement upon affixation to said carrier.

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