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Proceedings Paper

Nonstandard diffraction structures for OVDs
Author(s): Rene Staub; Wayne Robert Tompkin
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Paper Abstract

We have developed a palette of visual features based on non- standard diffraction structures, where the profile-shape and the profile depth are determining the intended effects. The target is to provide features with increased security inherent to the diffractive structures. Since the exact reconstruction of the profile is the basis of the effects, these features are very resilient against counterfeiting by standard holographic techniques. Three different types of grating structures and their use as security-feature are described.

Paper Details

Date Published: 1 April 1998
PDF: 9 pages
Proc. SPIE 3314, Optical Security and Counterfeit Deterrence Techniques II, (1 April 1998); doi: 10.1117/12.304686
Show Author Affiliations
Rene Staub, Landis & Gyr Communications Corp. (Switzerland)
Wayne Robert Tompkin, Landis & Gyr Communications Corp. (Switzerland)

Published in SPIE Proceedings Vol. 3314:
Optical Security and Counterfeit Deterrence Techniques II
Rudolf L. van Renesse, Editor(s)

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