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1. (WO2018050283) VALUE DOCUMENT HAVING SECURITY MARKING AND METHOD FOR IDENTIFYING THE SECURITY MARKING

Pub. No.:    WO/2018/050283    International Application No.:    PCT/EP2017/001087
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Fri Sep 15 01:59:59 CEST 2017
IPC: B42D 25/378
B42D 25/29
Applicants: GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH
Inventors: RAUSCHER, Wolfgang
DECKENBACH, Wolfgang
Title: VALUE DOCUMENT HAVING SECURITY MARKING AND METHOD FOR IDENTIFYING THE SECURITY MARKING
Abstract:
The invention relates to a value document having a security marking in the form of at least two luminescent substances, which are present in a defined relative quantity proportion and can be excited together by an excitation pulse. The time curves of the intensities are different and at least one luminescent substance has a non-monoexponential time curve. In a method for identifying the security marking, the time curve of the common intensity is detected and a linear combination of formula (I) is adapted, wherein Ii(t) are time curves of the intensities of the luminescent substances. The security marking is identified based on the linear coefficients Ci.