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Apparatus to analyze security features on objects

  • US 8,123,134 B2
  • Filed: 07/27/2010
  • Issued: 02/28/2012
  • Est. Priority Date: 08/31/2001
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a camera to capture video or imagery corresponding to;

    first indicia on a surface of a physical object with a first ink or dye, wherein the first ink or dye has a first emission decay rate;

    second indicia on the surface with a second ink or dye, wherein the second ink or dye includes a second emission decay rate, wherein the first emission decay rate is relatively shorter than the second emission decay rate, wherein the first indicia and second indicia are configured to collectively convey a first code when the first ink or dye and the second ink or dye are excited by non-visible light; and

    an electronic processor programmed to read a second code on the second indicia, wherein the second code becomes readable as emissions from the first ink or dye decrease to a first predetermined level, but before the emissions from the second ink or dye decrease to a second predetermined level.

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