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Proceedings Paper

Holographic anticounterfeit method and device with encoded pattern
Author(s): Pai Ping Huang
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Paper Abstract

An advanced holographic anti-counterfeit method and device is proposed to make the labels, which are used to identify the commercial products, being highly difficult to duplicate. This method provides a dot-matrix hologram, which is formed with a synthesized image including a random dispersed background pattern and a creative graphic design as a hidden pattern encoded into the background pattern. The background pattern is visible to the naked eyes of a viewer, but the hidden pattern can be viewed only through a special viewing device, such as a lenticular lens sheet. If the lenticular lens sheet covers the hologram irrelevantly or with an unfitted specification, the hidden pattern can't be decoded, and the moire effect will appear. A logo of U.S. MAIL is demonstrated as the encoded pattern, and the synthesized image is recorded in a 35 mm X 35 nm dot- matrix hologram on the photo-plate.

Paper Details

Date Published: 1 June 1999
PDF: 7 pages
Proc. SPIE 3633, Diffractive and Holographic Technologies, Systems, and Spatial Light Modulators VI, (1 June 1999); doi: 10.1117/12.349342
Show Author Affiliations
Pai Ping Huang, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 3633:
Diffractive and Holographic Technologies, Systems, and Spatial Light Modulators VI
Ivan Cindrich; Sing H. Lee; Richard L. Sutherland, Editor(s)

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