Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Giesecke & Devrient Gmbh

Friedrich-Schiller-Universitat Jena

Otto-Von-Guericke-Universität Magdeburg

Universitatsklinikum Jena

Friedrich-Schiller-Universitaet

Giesecke+devrient Currency Technology Gmbh

Thomas Pertsch

Manfred Heim

Michael Rahm

Marius Dichtl

Hans Lochbihler

Gunther Notni

Ernst-Bernhard Kley

Falk Eilenberger

Jorg Petschulat

Chen Zhang

Markus Graefe

Thomas Kampfe

Ayoub Al-hamadi

Markus Gräfe

Jan Sperrhake

Frank Setzpfandt

Maria Nisser

Michal Rapczynski

Thomas KÄMPFE

Jörg Petschulat

A method and a device for non-contact determination of temporal color and/or intensity variations in objects in a scene. Monoscopic overview images of the scene are detected with first and second overview cameras from two different viewing directions, and calculated to form a stereoscopic overview map. A two-dimensional detail image is detected by a detail camera from a third viewing direction and is projected on the overview map. Measurement surfaces in the scene are selected based on criteria which are predetermined depending on parameters on which conclusions are to be drawn from the color variations and/or intensity variations. Light emitted by the measurement surfaces is detected in a spatially-resolved and wavelength-resolved manner in a continuously-captured series of measurement images in a predetermined spectral range. The measurement surfaces are analyzed in the measurement images with respect to temporal variation of the intensity and/or color of the light, and the results displayed.

Method and device for the non-contact determination of color and intensity variations over time in objects

An optical assembly for the illumination and hyperspectral evaluation of an object, having a light source or an optical element at which a light source radiates, wherein the light source or the optical element is designed to divide pairs of unambiguously assignable photons into a first light beam and a second light beam so that the first light beam hits a first detector system and the second light beam is directed at an object and light radiation coming from the object is directed at an optical element which spectrally decomposes light radiation and, from the optical element spectrally decomposing said light radiation, is directed at a second detector system. The first light beam can also be directed at a spectrally decomposing optical element and, from there, at a first detector system, and the light radiation coming from the object can be directed directly at the second detector system. The first detector system is designed to perform a spatially resolved sensing of the first light beam, and the first detector system or the second detector system is designed to perform a spectrally resolved sensing of the second light beam. The detector systems are connected to an electronic evaluation unit, by means of which the measurement signals captured with spatial and spectral resolution are associated. The first and second light beams are spectrally, spatially and temporally correlated.

Optical assembly for the hyperspectral illumination and evaluation of an object

The present invention relates to a security element () for security papers, value documents and the like, having a feature region () that selectively influences incident electromagnetic radiation (). According to the present invention, it is provided that the feature region () includes metallic nanopatterns () in which volume or surface plasmons are excited and/or resonance effects are caused by the incident electromagnetic radiation ().

Security element

Growing community of inventors

Hermsdorf, Germany

Thomas Pertsch