Volume Holograms for Security Documents
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United States of America Patent
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Mar 16, 2017
app pub date -
Apr 23, 2015
filing date -
Apr 23, 2014
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Abstract
A method for producing a security document comprising a volume hologram, including the steps of: applying an optically sensitive material onto a first surface of a substrate in a first region of the first surface; and irradiating the optically sensitive material with patterned radiation configured for recording a volume hologram within the optically sensitive material.
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