The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 2010
Filed:
May. 25, 2005
Ulrich Schanda, Holzkirchen, DE;
Horst Dötsch, Osnabrück, DE;
Carsten Holthaus, Osnabrück, DE;
Alexei Trifonov, Osnabrück, DE;
Jürgen Schützmann, Pfaffenhofen, DE;
Ulrich Schanda, Holzkirchen, DE;
Horst Dötsch, Osnabrück, DE;
Carsten Holthaus, Osnabrück, DE;
Alexei Trifonov, Osnabrück, DE;
Jürgen Schützmann, Pfaffenhofen, DE;
Giesecke & Devrient GmbH, Munich, DE;
Abstract
The invention concerns a device and a method for examining magnetic properties of objects, in particular of sheet material such as for example bank notes. Therein the invention proceeds from a device and a method for examining magnetic properties of objects with a magneto-optical layer having magnetic domains, the optical properties of the magneto-optical layer being influenced by the magnetic properties of the object to be examined, at least one light source for the generation of light incident upon the magneto-optical layer, and at least one sensor for the reception of light which is transmitted and/or reflected by the magneto-optical layer, with a magnetic filed in the area of the magneto-optical layer which extends substantially parallel to the surface of the magneto-optical layer.