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Proceedings Paper

Visual hologram security
Author(s): Pawel J. Stepien; Roman Stachowiak
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Paper Abstract

Visual features of classical and high-tech security holograms are described and their advantages and shortbacks discussed. New holographic features, improving both security hologram visual appeal and its anticounterfeiting value are described. 2D/3D backgrounds can be highly improved using multicolor textures, smooth changing color pattern and variable background depth. Complex grating based images with a lot of colors and smooth transitions between them highly improves visual and security value of grating based optically variable devices. Modulation of grating parameters may create distinguishing effect of glossy 3D surface. Combining various holographic features increases security holograms value very significantly.

Paper Details

Date Published: 26 August 2004
PDF: 3 pages
Proc. SPIE 5566, Optical Security and Safety, (26 August 2004); doi: 10.1117/12.577098
Show Author Affiliations
Pawel J. Stepien, Polskie Systemy Holograficzne s.c. (Poland)
Roman Stachowiak, Polskie Systemy Holograficzne s.c. (Poland)


Published in SPIE Proceedings Vol. 5566:
Optical Security and Safety
Zbigniew Jaroszewicz; Ewa Powichrowska; Mariusz Szyjer, Editor(s)

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