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. 23, 2018
Filed:
Aug. 14, 2014
Bundesdruckerei Gmbh, Berlin, DE;
Lazar Kulikovsky, Berlin, DE;
Manfred Paeschke, Wandlitz, DE;
Jörg Fischer, Berlin, DE;
Olga Kulikovska, Berlin, DE;
Detlef Starick, Berlin, DE;
BUNDESDRUCKEREI GmbH, Berlin, DE;
Abstract
Method and device for testing a security element () of a security document, the security element () being able to contain at least one substance () which has optically variable properties, including the following method steps: illuminating the security element () with at least one predetermined illumination parameter, filtering the light reflected by the security element into a first component (RLp) having a first polarisation, determining an intensity (I) of the first component (RLp) of reflected light reflected at a reflection angle (ϕ), for at least one reflection angle (ϕ), and verifying the presence of a substance () which has optically variable properties as a function of the intensity (I) of the first component (RLp).