Optically variable element comprising a sequence of...

Details Optically variable element comprising a sequence of... Optically variable element comprising a sequence of...

2006-01-03

2006-01-03

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S585000, C359S584000, C359S577000, C359S566000

Reexamination Certificate

active

06982832

ABSTRACT:
The invention concerns an optically variable element, in particular an optically variable safeguard element for safeguarding banknotes, credit cards and the like, and a security product and a foil, in particular an embossing foil or a laminating foil, with such an optically variable element. The optically variable element has a thin film layer (54, 55, 58) for producing color change by means of interference and a further layer (51, 52, 53, 59). The thin film is in the form of a partial thin film element which covers the surface region of the further layer only in region-wise and pattern-shaped manner.

REFERENCES:
patent: 5801857 (1998-09-01), Heckenkamp et al.
patent: 6761959 (2004-07-01), Bonkowski et al.
patent: WO 01/03945 (2001-01-01), None
patent: WO 02/00445 (2002-01-01), None

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