Security Documents with Personalised Images and Methods of Manufacture
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United States of America Patent
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N/A
Issued Date -
Jul 22, 2010
app pub date -
Jan 16, 2007
filing date -
Jan 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of producing a personalized security document or article includes providing a substrate which is transparent at least to visible light. A diffractive optical microstructure is formed in a substantially opaque layer disposed on a surface of the substrate. The diffractive structure comprises a plurality of apertures formed in the opaque layer, such that when the structure is suitably illuminated, for example by a beam of collimated light, a projected image is generated which is unique to a particular individual. Also, personalized security documents or articles made in accordance with the method.
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