SECURITY STRUCTURE COMPRISING A REFLECTIVE OPTICAL STRUCTURE, AND ASSOCIATED METHOD
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United States of America Patent
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app pub date -
Mar 3, 2014
filing date -
Sep 2, 2011
priority date (Note) -
Abandoned
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Abstract
A security element for integration into documents for authentication thereof. The security element comprises a substrate. A reflective optical structure and a reference pattern are disposed on the same side of the substrate. The reflective optical structure is made up of an array of Fresnel lenses. The reference pattern appears in the foreground when observed by an observer. A virtual image of the observer appears in the background behind the foreground pattern.
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