US 7,405,851 B2Granted

Method for identifying articles

AssigneeTesa Scribos GmbH

InventorsSteffen Noehte, Christoph Dietrich, Matthias Gerspach, Jörn Leiber, Stefan Stadler

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Abstract

The invention relates to a method for identifying articles, wherein article identification data are made available and the article is provided with a hologram representing said data so that the article can be identified by way of an intensity profile corresponding to said hologram. To this end, article-identifying individual data are provided, a hologram profile is digitally calculated using said individual data, and an intensity modulation of the hologram-producing beam is determined. The hologram-producing beam transfers the hologram pixels onto a hologram support that is associated with the article to be identified so that the article can be identified by way of the intensity profile reproduced from the associated hologram support.

Claims13

Dependent claims

A method for producing holograms as identification areas provided on articles, said articles being identifiable using an intensity pattern reproduced from the hologram, said method comprising:

providing article identification data in a two dimensional array;
digitally calculating a two dimensional pattern of hologram interference fringes on the basis of said two-dimensional array providing a modulation for writing each part of said two dimensional pattern of hologram interference fringes point-by-point onto a data carrier using a laser as a hologram writing means;
said article identification data provided as individual article identification data;
the laser used as the hologram writing means being a single ray laser fed from a power supply;
modulating said power supply to provide an intensity modulation to the laser ray for hologram writing;
and
wherein such data carrier is a polymer applicable to the article.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/312,466Filed 22 Jun 2001
Priority: DE 100 30 62928 Jun 2000
Published: US 2004/0051919 A118 Mar 2004
Granted: 29 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06K 19/16
At least one kind of marking being used for authentication, e.g. of credit or identity cards: the marking being a hologram or diffraction grating
G03H 1/08
Processes or apparatus for producing holograms: synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
G03H 1/0011
Adaptation of holography to specific applications: for security or authentication
G06K
Graphical data reading