Optically variable element and the use thereof

Details Optically variable element and the use thereof Optically variable element and the use thereof

2003-11-07

2009-06-23

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S567000, C283S086000

Reexamination Certificate

active

07551335

ABSTRACT:
The invention relates to an optically variable element which at least in surface portions has an interface embedded between two layers and which forms an optically effective structure, that interface having a free-form surface which appears three-dimensionally for a viewer. To emphasise that free-form surface the invention provides that the free-form surface is formed by a partial region of the interface, which is of a lens-like configuration and which produces a magnification, reduction or distortion effect. The invention also provides the use of such optically variable elements as a security element to prevent forgery of value-bearing documents or for articles to be safeguarded, in particular as part of the decorative layer arrangement of a transfer or laminating film.

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Anlage 1—Select pages from http://www.cobum.com; “Coburn Graphic Films, Inc., —Multi-Lens®,” (3 pages), dated Jun. 12, 2006.
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