Identification particles and system and method for retrospective identification using spectral codes
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Abstract
A system and method using reporter elements provides retrospective identification of articles. An article is marked with reporter elements such that the mark has a characteristic spectral response when exposed to energy stimulation. To verify the authenticity of the article, a reader scans the mark containing the reporter elements and obtains a spectral signature. The reader then compares the detected signature to the characteristic signature to determine the authenticity or identity of the marked article.
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Citations
31 Claims
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1-20. -20. (canceled)
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21. An identification system, comprising
a) a particle incorporating a code; -
b) a carrier material entraining the particle; and
c) a reporter element incorporated into the entraining carrier material, said reporter element emitting a spectral signature responsive to energy stimulation. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of making a coded particle, comprising the steps of:
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a) causing a coded particle to be entrained in a carrier material; and
b) causing a reporter element to be entrained in the carrier material.
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Specification