OPTICAL DEVICES FOR AUTHENTICATION AND METHODS OF MAKING SAME
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United States of America Patent
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Jan 3, 2019
app pub date -
Dec 21, 2016
filing date -
Dec 21, 2016
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Abstract
The invention optical device comprising a self-processing photopolymer material configured to produce a variable two- or three- dimensional diffraction pattern when said material is illuminated by a light source. The invention provides a new material science and process technology which produces a serialisable anti-counterfeit optical device, based on a self-processing photopolymer.
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