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US 2010/0140501 A1Published application
Fluorescence notch coding and authentication
AssigneeSpectra System Corporation
InventorNabil M. Lawandy
Life of this patent
Estimating the term…
Abstract
Systems and methods for document and product authentication using a variety of absorption and emission signatures are disclosed. Emission signatures in the form of florescent or phosphorescent coatings, inks and substrates are used for authentication and protection of items such as documents, currency, and secondary packaging for tobacco, luxury goods and pharmaceuticals. Spectrally overlapping absorption and emission materials are combined to provide a unique spectral fingerprint detectable by a scanner.
Claims27
A method of authenticating an article comprising:
- providing an electromagnetic absorbing substance capable of absorbing at least one narrow absorption line;
- providing an electromagnetic emitter substance capable of emitting a broad emission bandwidth;
- and
- creating an emission spectral signature in response to excitation of the emitter substance that overlaps the at least one narrow absorption line of the absorbing substance.
1 more element
A security feature comprising:
- a plurality of absorbing particles or compounds capable of absorbing at least one narrow absorption line;
- a plurality of emitter particles or compounds capable of emitting a broad emission bandwidth;
- and
- where excitation of the absorbing particles or compounds and the emitter particles or compounds creates a unique spectral signature in conjunction with at least one overlapping narrow absorption line.
1 more element
Dependencies are inferred from the claim text.