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Proceedings Paper

Criteria on which a judgement of optically variable security marks may be based
Author(s): Tomasz Szoplik; Marek Burski; Pawel J. Stepien
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Paper Abstract

We consider several aspects of security properties of holographic optically variable devices that are used for document protection. Features of optically recorded rainbow holograms, stereograms, holograms with pixel structure, and volume holograms are discussed from the point of view of optics. Similar approach is used with respect to optical properties of computer generated stereograms and digital holograms with pixel structure. Optical properties which are considered include diffraction efficiency, uniformness of the recording, angular range of horizontal parallax, multiplicity of recording, spatial separation of recording planes, color visual perception, spectral range, as well as transmission and reflection properties. The second group of security properties is connected with employed technology. Technological aspects of a hot stamping foil structure, self-destructive labels, and other are considered. Security properties of holographic optically variable marks are also analyzed in terms of novelty of employed techniques, the level of scientific and technological complexity, as well as resistance to imitating.

Paper Details

Date Published: 15 March 1996
PDF: 6 pages
Proc. SPIE 2659, Optical Security and Counterfeit Deterrence Techniques, (15 March 1996); doi: 10.1117/12.235460
Show Author Affiliations
Tomasz Szoplik, Warsaw Univ. (Poland)
Marek Burski, Polish Security Printing Works (Poland)
Pawel J. Stepien, Warsaw Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 2659:
Optical Security and Counterfeit Deterrence Techniques
Rudolf L. van Renesse, Editor(s)

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