Authenticity feature in the form of luminescent substances
AssigneeGiesecke+Devrient Currency Technology GmbH
InventorsThomas Giering, Peter Kersten, Ulrich Magg, Gregor Grauvogl
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Abstract
The invention relates to a security element having at least two luminescent substances. The invention starts out from a security element having at least two luminescent substances, whereby the security element has a first and a second luminescent substance which have a substantially identical, joint emission band, whereby at least the first or the second luminescent substance, or both luminescent substances, have at least one excitation band that leads to an emission at the joint emission band only in the case of the first or the second luminescent substance.
Claims19
1-18. (canceled)
A security element comprising at least two luminescent substances, said at least two luminescent substances comprising first and second luminescent substances which have a substantially identical joint emission band, wherein at least the first or the second luminescent substance, or both luminescent substances, have at least one excitation band that leads to an emission at the joint emission band only in the case of the first or the second luminescent substance, and wherein the first luminescent substance comprises a single luminophore and the second luminescent substance comprises a mixture of luminophores.
Dependencies are inferred from the claim text.