Security system, particularly for valuable documents

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

2008-01-01

2008-01-01

Chang, Audrey (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S569000, C283S086000

Reexamination Certificate

active

07315407

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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Database WPI, Derwent Publications Ltd., London, GB; AN 1998-435779, XP002183459, Bondarev L.A., Kurakin S.V., Kurilovich A.V., “Hologram class monitoring device” & RU 2103741 (Kripton Res Prodn. Assoc. Stock Co.), Jan. 27, 1998.

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