Optical element and method for the production thereof

Details Optical element and method for the production thereof Optical element and method for the production thereof

2008-09-02

2008-09-02

Assaf, Fayez G (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S022000, C359S572000, C428S410000

Reexamination Certificate

active

11450402

ABSTRACT:
A method for producing an optical element, preferably a security feature, wherein a film having a first embossed hologram in an embossing layer is provided, and a second embossed hologram is embossed into the same embossing layer such that the first embossed hologram is partly replaced with the second embossed hologram. The invention further relates to a method for producing an optical element wherein an embossable film provided with an embossed hologram is partly filled with printing lacquer, and a method for producing an optical element wherein hologram embossing is prevented by prior partial printing of the embossing film with curable printing lacquer. The invention relates further to optical features producible by the inventive methods, documents of value having an inventive optical feature and a numbering embosser for use in an inventive production method.

REFERENCES:
patent: 5483363 (1996-01-01), Holmes et al.
patent: 5492370 (1996-02-01), Chatwin et al.
patent: 5900954 (1999-05-01), Katz et al.
patent: 5958528 (1999-09-01), Bernecker
patent: 6337752 (2002-01-01), Heckenkamp et al.
patent: 6493014 (2002-12-01), Aroneo
patent: 39 32 505 (1991-04-01), None
patent: WO 97 04339 (1997-02-01), None

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