Optical: systems and elements – Holographic system or element – Authentication
Reexamination Certificate
2006-10-24
2006-10-24
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Holographic system or element
Authentication
C359S003000, C359S022000, C359S030000, C359S900000
Reexamination Certificate
active
07126729
ABSTRACT:
The invention relates to a method of providing an article with identifying information, in which a hologram is provided from which at least first and second hologram patterns separated physically from each other can be reproduced. In this case, provision is made for the hologram to be produced in such a way that the first and second hologram patterns can generally be reproduced in one and the same direction but in different planes.
REFERENCES:
patent: 4269473 (1981-05-01), Flothmann et al.
patent: 5483363 (1996-01-01), Holmes et al.
patent: 2005/0093856 (2005-05-01), Borgsmuller et al.
patent: 0 604 943 (1994-07-01), None
patent: 52-027651 (1977-03-01), None
patent: 62-283385 (1987-12-01), None
patent: 2000-134643 (2000-05-01), None
patent: WO 93/12506 (1993-06-01), None
Dorsch R.R. et al.: “Fresnel Ping-Pong Algorithm for Two-Plane Computer-Generated Hologram Display”, Applied optics, Optical Society of America, Washington, US, Feb. 10, 1994.
Blazejewski Anna
Borgsmüller Stefan
Dietrich Christoph
Gerspach Matthias
Leiber Jörn
Assaf Fayez G.
Baker & Daniels
Tesa Scribos GmbH
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