Security holograms
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United States of America Patent
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Aug 6, 2013
Grant Date -
Aug 5, 2010
app pub date -
May 7, 2008
filing date -
May 11, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
We describe techniques for recording a holographic image onto holographic recording film, in particular for security holograms. We thus describe a structure having a stack comprising the holographic recording film and a multichannel image generation device under the film. A three-dimensional object (or hologram of a 3D object) is provided, located under the multichannel image generation device. At least a portion of the multichannel image generation device is substantially transparent or absent in a region above the object. A holographic image is recorded in the film by illuminating the stack with laser light. The multichannel image generation device under the film may comprise a volume reflection hologram of a lenticularly generated image. The structure records a hologram of the 3D object in conjunction with a multi-channel holographic image.
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