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AssigneeGiesecke+Devrient Currency Technology GmbH
InventorsWolfgang Rauscher, Wolfgang Deckenbach
Estimating the term…
A value document has a security marking in the form of at least two luminescing substances which are present in a defined relative quantitative share and are jointly excitable by one excitation pulse. The time courses of the intensities are different and at least one luminescing substance has a non-monoexponential time course. In a method for identifying the security marking, the time course of the total intensity is detected and a linear combination of a formula is adapted including time courses of the intensities of the luminescing substances. The security marking is identified on the basis of the linear coefficients.
A value document having a security marking in the form of at least two luminescing substances, wherein
The method according to 11, in which in step iv-1) the ratio Mi is ascertained by the ratio of the associated linear coefficient ci to the sum of all linear coefficients ci.
Dependencies are inferred from the claim text.