Security system, particularly for valuable documents

Details Security system, particularly for valuable documents Security system, particularly for valuable documents

2010-04-07

2011-12-13

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S032000, C359S015000, C283S086000

Reexamination Certificate

active

08077364

ABSTRACT:
The invention relates to a security system especially for security documents, wherein a security element is provided in a carrier plane, that under incident light holographically reconstructs a pattern outside the carrier plane, in which concealed information is stored and having a flat transparent verification element which on flat contact with the security element makes the information stored therein visible. The invention further relates to a security element and a verification element for use in the security system and a security document fitted with the security system. The invention additionally relates to an apparatus and a method for reading out the concealed information which is stored holographically in the pattern reconstructed on the security element under incident light.

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patent: 19729918 (1999-01-01), None
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patent: 98/15418 (1998-04-01), None

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