ELEMENT FOR SECURITY DOCUMENT COMPRISING AN OPTICAL STRUCTURE
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United States of America Patent
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app pub date -
Jun 24, 2013
filing date -
Dec 22, 2010
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Abandoned
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Abstract
A security element adapted for integration into a security document. The security element having a substrate with a first face and a second face. An optical structure is disposed on the first face, and at least two patterns are inscribed on the second face. The two patterns are at least partially identical. The first pattern is observable at a first position on the second face through the optical structure along a first viewing angle. The second pattern is observable at a second position on the second face through the optical structure along a second viewing angle. Authenticity of the document may be verified by comparing the observed patterns.
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