Methods for optically encoding an object with upconverting materials and compositions used therein
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United States of America Patent
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Sep 13, 2016
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app pub date -
Jul 29, 2014
filing date -
Jul 12, 2003
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Abstract
The present invention relates generally to encoding samples. More specifically, it relates to barcodes and compositions involving upconverters and methods including them. In a composition aspect of the invention, a composition comprising two or more lanthanide materials is provided. Each lanthanide material comprises a host, an absorber, and an emitter, and the materials emit detectable electromagnetic radiation upon excitation with absorbable electromagnetic energy. One or more relative ratios of emission intensities uniquely identify the composition.
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