Security Document Comprising A Light Source And Light-Processing Device
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United States of America Patent
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Issued Date -
Jul 17, 2008
app pub date -
Nov 23, 2005
filing date -
Nov 23, 2004
priority date (Note) -
Abandoned
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Abstract
A security document is provided with a light source and with a light-processing device, e.g. in the form of a hologram, which processes the light emitted by the light source by deflecting, reflecting, polarizing and/or partially absorbing it. The properties of the light source downstream of the light-processing device which are recognized by the tester or a test device as characteristic increase the security of the document.
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