PROTECTIVE DEVICE Russian patent published in 2004 - IPC

Abstract RU 2224289 C2

FIELD: means for protecting securities and other valuables against unauthorized reproduction or counterfeit. SUBSTANCE: protective device has holographic structure that generates optically variable effects and is built of at least two sections. Its illumination with white light produces image of two holographic elements disposed on or near plane adjacent to or aligned with that of device. Under coherent light sections produce latent images in the form of characters whose planes are spaced apart from physical plane of device; latent images are recovered at different angles to normal of device supporting base causing spatial division of latent images into their display planes. Latent images are not visible when illuminated by white light. EFFECT: enhanced reliability of valuables protection. 20 cl, 13 dwg

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RU 2 224 289 C2

Authors

Drinkvoter Kennet Dzhon

Kholms Brajan Vill'Jam

Dates

2004-02-20Published

2000-05-30Filed