Robert Boschgmbh

Bundesdruckerei Gmbh

Hologram Industries Research Gmbh

Hsm Holographic Systems Munchen Gmbh

Zishao Yang

Helmut Sautter

Vincent Thominet

Gunther Dausmann

Gerhard Hochenbleicher

Frank Wolf

Arnim Franz-Burgholz

Roland Gutmann

Günther Dausmann

Armin Jerger

Harald Hoeppner

Robert Massen

Detlef Märtens

Guenther Dausmann

Detlef Maertens

Thomas Franz

Thomas Leitner

Klaus Gnadig

Thomas L&ouml;er

J&ouml;rg Eberhardt

Detlef M&auml;rtens

G&uuml;nther Dausmann

Thomas Loeer

Thomas Loer

Detlef Martens

Jorg Eberhardt

Georg Hertl

Rudi De Jongh

Rudolf Mathe

Klaus Gnädig

Löer Thomas

Harald Hoepner

The invention relates to a method for the production of a multicolor hologram by means of a capture beam, wherein the utilized capture beam () has a plurality of beam bundles of the same wavelength. Advantageously, the multicolor hologram is produced by copying the structure of multiple single-color subholograms of a master hologram () in a copy layer () which is affixed parallel to the master hologram, by illuminating this copy layer with the single-color capture beam. Each beam bundle appears at a prespecified angle of incidence, wherein the angles of incidence are calculated in such a manner that the structure of a corresponding subhologram is produced in the copy layer. In this way, a falsification is nearly impossible.

Method for the production of a multi-color volume hologram, a document with such a hologram, and a volume hologram master

A rain sensor, particularly for a motor vehicle, includes a light-conducting member arranged in an intermediate layer of a glass, and is designed as an optically closed system.

Rain sensor, especially for a motor vehicle

A rain sensor for a motor vehicle, having a transmitter emitting radiation, a receiver, and a holographically embodied diffractive element that has a linear-grating-like structure.

Rain sensor, in particular for a motor vehicle

An apparatus for evaluating distinguishing authenticity features comprising diffraction elements on a document which is illuminated by an illumination source. The distinguishing authenticity element which is to be examined, diffracts the beam of the illuminating source and projects it onto an evaluating unit in the device. In order to be independent of the nature and location of the diffraction pattern, the diffraction pattern derived from the document to be examined is projected onto a screen and the image of the pattern recorded and evaluated by a camera (matrix or cells).

Device for evaluating diffractive authenticity features

A method for determining the authenticity of a hologram with the following steps:

Method for checking authenticity of a hologram and a reading device for

A process for the manufacture of non-replicable holograms possessing authenticity features which are copies of a master hologram. To form a master hologram, a hologram is taken of a randomly structured optical element, for example of a ground glass screen or a diffusor. The resulting hologram forms an authenticity feature, with an optical system which leads to a hologram with a pattern of lines that are parallel to one another.

Process for the manufacture of non-replicable holograms possessing

Growing community of inventors

Erding, Germany

Zishao Yang