Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Rainer Hoppe

Thomas Giering

Johann Kecht

Wolfgang Deckenbach

Ulrich Scholz

Kai Uwe Stock

Martin Stark

Thomas Attenberger

Fritz Stahr

The invention relates to a printed document of value having at least one authenticity feature in the form of a luminescent substance based on doped host lattices. The host lattice has a strong crystal field and is doped with at least one chromophore with the electron configuration (3d).

Security document with luminescent transition metal doping

A value or security document () contains a security feature () in the form of a film laser with an emitter layer () and preferably a protective layer (). A spatial, periodic modulation (), preferably of the surface of a substrate, permits fine adjustment of a laser wavelength within a range of possible wavelengths. This permits a coding of the security feature by different portions of different wavelengths.

Article, especially valuable and security document, comprising a security feature

The invention relates to a document of value, such as a paper of value, ID card or the like, having at least one authenticity feature in the form of a luminescent substance. The luminescent substance has particles consisting of a dye-laden molecular sieve whose structure forms an optical resonator. In said resonator at least one dye can be excited to show stimulated emission, the dye being incorporated in the cavities of the molecular sieve or located in or on the internal and external surfaces of the molecular sieve, and the transition to stimulated emission being accompanied by a detectable change in the luminescent properties of the dye.

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Nuremberg, Germany

Rainer Hoppe