Leuchtstoffwerk Breitungen Gmbh

Sensor-instruments Entwicklungs- Und Vertribes-gmbh

Sensor Instruments Entwicklungs- Und Vertriebs Gmbh

Thomas Kaib

Walter Braumandl

Benedikt Daumann

Dominik Uhlich

Thomas Bitzer

A method for determining the authenticity of an object by marking the object with a first luminescent material with a first decay behavior over time, marking the object with a second luminescent material with a second decay behavior that differs from the first decay behavior, excitation of the luminescent materials with a light pulse, measuring the afterglow intensities of both luminescent materials temporally after the excitation with the light pulse, forming a difference signal or identity signal from the afterglow intensities measured over the elapsed time, determining the time of a zero crossing of the difference signal or the time of the identity signal of a comparator, comparing the time determined by the zero crossing or by the identity signal with a setpoint value.

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EISENACH, Germany

Thomas Kaib