Method for the production of a multi-color volume hologram, a document with such a hologram, and a volume hologram master
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United States of America Patent
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Aug 11, 2015
Grant Date -
Mar 25, 2010
app pub date -
Feb 13, 2008
filing date -
Jun 1, 2007
priority date (Note) -
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Abstract
The invention relates to a method for the production of a multicolor hologram by means of a capture beam, wherein the utilized capture beam (6) has a plurality of beam bundles of the same wavelength. Advantageously, the multicolor hologram is produced by copying the structure of multiple single-color subholograms of a master hologram (1) in a copy layer (5) which is affixed parallel to the master hologram, by illuminating this copy layer with the single-color capture beam. Each beam bundle appears at a prespecified angle of incidence, wherein the angles of incidence are calculated in such a manner that the structure of a corresponding subhologram is produced in the copy layer. In this way, a falsification is nearly impossible.
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