Security holograms
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United States of America Patent
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May 29, 2012
Grant Date -
Feb 26, 2009
app pub date -
Aug 22, 2008
filing date -
Aug 23, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Improved techniques for using holograms to provide security for documents and the like. A method of providing a tamper-resistant pattern in association with a hologram on a substrate, the method including: preparing a hologram, the hologram being recorded in a photosensitive recording layer carried by a carrier; printing a pattern onto the photosensitive recording layer; and then attaching the hologram to a substrate by adhesive such that the pattern is between the photosensitive recording layer and the substrate to provide a tamper-resistant pattern in association with the hologram.
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