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Proceedings Paper

Nondiffractive optically variable security devices
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Paper Abstract

This paper discusses security applications of reversible photosensitivity that resulted from a search in SECURIDAT--viz. dual fluorescence with longwave remanence, thermochroism, stimulation of mixed inorganic phosphors, and photochroism.

Paper Details

Date Published: 1 October 1991
PDF: 13 pages
Proc. SPIE 1509, Holographic Optical Security Systems, (1 October 1991); doi: 10.1117/12.47115
Show Author Affiliations
Rudolf L. van Renesse, TNO Institute of Applied Physics (Netherlands)

Published in SPIE Proceedings Vol. 1509:
Holographic Optical Security Systems
William F. Fagan, Editor(s)

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