Method and Apparatus for Making and Detecting a Document Verification Indicator Using Optical Pattern Encryption

A method and apparatus for creating and detecting an optically encoded document having a uniquely designed document verification indicator is disclosed. One embodiment includes applying a spatially varying Brewster angle pattern on a substrate. Another embodiment includes an apparatus for detecting the spatially varying Brewster angle pattern including a light source, a slit aperture, a polarizer, at least one parabolic mirror, and an image capturing device.

Attached files:
US 20100266164.jpg

Patents:
US 20,100,266,164

Inventor(s): DANA KRISTIN [US]; LIVESCU GABRIELA [US]; LU YICHENG [US]

Type of Offer: Licensing

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