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:
Mar. 01, 2016
Filed:
Sep. 10, 2010
Christian Fuhse, Otterfing, DE;
Michael Rahm, Bad Tolz, DE;
Manfred Heim, Bad Tolz, DE;
Ralf Liebler, Schliersee, DE;
Christian Fuhse, Otterfing, DE;
Michael Rahm, Bad Tolz, DE;
Manfred Heim, Bad Tolz, DE;
Ralf Liebler, Schliersee, DE;
Giesecke & Devrient GMBH, Munich, DE;
Abstract
The present invention relates to a thin-film element () having an interference layer structure for security papers, value documents and the like, having at least two semitransparent absorber layers () and at least one dielectric spacing layer () arranged between the at least two absorber layers. According to the present invention, it is provided that the two absorber layers () are each formed from a material having a complex refractive index N whose real part n and imaginary part k differ at least in a portion of the visible spectral range by a factor of 5 or more.