Optical feature, in particular for documents of value, and a...

Details Optical feature, in particular for documents of value, and a... Optical feature, in particular for documents of value, and a...

2005-04-05

2005-04-05

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S567000

Reexamination Certificate

active

06876472

ABSTRACT:
The invention relates to an optical feature, in particular for documents of value, having at least one at least dual-channel hologram for the holographic reconstruction of different images from different directions of gaze, wherein different regions of the hologram are associated with the different channels and the regions of the hologram reconstructing the respective image under incident light have sub-regions which do not take part in the image reconstruction, to a data carrier having at least one optical feature of the invention and to a method for the manufacture of an optical feature, in particular for documents of value.

REFERENCES:
patent: 5808758 (1998-09-01), Solmsdorf
patent: 5815292 (1998-09-01), Walters
patent: 6088161 (2000-07-01), Lee
patent: 6337752 (2002-01-01), Heckenkamp et al.
patent: 0219012 (1987-04-01), None

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