Data Storage in a Diffractive Optical Element
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United States of America Patent
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Issued Date -
Aug 5, 2010
app pub date -
Jan 16, 2007
filing date -
Jan 16, 2006
priority date (Note) -
Abandoned
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Abstract
A diffractive optical element (DOE) and various methods of producing such a DOE are provided in which a diffractive optical microstructure is formed with encrypted data on at least one side of a transparent substrate or in a layer applied to the substrate. The diffractive optical microstructure when illuminated with collimated light, generates a far field interference pattern corresponding to the encrypted data which may be decrypted with suitable optical detectors and processing equipment.
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