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Counterfeit-resistant materials and a method and apparatus for authenticating materials

United States Patent

June 12, 2001
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Fluorescent dichroic fibers randomly incorporated within a media provide an improved method for authentication and counterfeiting protection. The dichroism is provided by an alignment of fluorescent molecules along the length of the fibers. The fluorescent fibers provide an authentication mechanism of varying levels of capability. The authentication signature depends on four parameters, the x,y position, the dichroism and the local environment. The availability of so many non-deterministic variables makes production of counterfeit articles (e.g., currency, credit cards, etc.) essentially impossible Counterfeit-resistant articles, an apparatus for authenticating articles, and a process for forming counterfeit-resistant media are also provided&
Ramsey; J. Michael (Knoxville, TN), Klatt; Leon N. (Oak Ridge, TN)
UT-Battelle, LLC (Oak Ridge, TN)
09/ 516,606
September 1, 1999
The United States Government has rights in this invention pursuant to Contract No. DE-AC05-84OR21400 between the U. S. Department of Energy and Martin Marietta Energy Systems, Inc.