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AssigneeFraunhoffer-Gesellschaft Zur FöRderung Der Angewandten Forschung E. V.
InventorsTobias Jochum, Waldemar Berchtold, Jan Niehaus, Bert Fischer, Christopher Krauss, Stephan Steglich, Martin Steinebach, Armin Wedel
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The present invention relates to a method for unique marking and to a method for the identification of products by identifying production inaccuracies in the spectral range of up to 3000 nm and to the use of said method for the unique identification of products/documents in serialization systems and/or track and trace systems and for document authentication. In order to increase the number of production inaccuracies up to a spectral range of up to 3000 nm, photoluminescent materials which, under photon excitation, emit radiation in the range of up to 3000 nm, preferably in the range of 750 to 1800 nm, most preferably in the range of 800 to 1100 nm, can be used. Said photoluminescent materials make it possible for production inaccuracies to be sensed from the spectral range of visible light (380 to 750 nm), via the near-infrared (NIR) range, to a spectral range of up to 3000 nm.
A method for unique marking of products/documents, comprising:
A product with an optical security feature for unique marking and identification of products onto at least one flat element of the surface of the product, wherein the security feature comprises an attached flat element, wherein the attached flat element comprises production inaccuracies that are extracted in the range of up to 3000 nm.
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Dependencies are inferred from the claim text.