Procedure for determining the authenticity of an object

US12288438B2 · kind B2 · utility

Assignees

• SENSOR-INSTRUMENTS ENTWICKLUNGS- UND VERTRIBES-GMBH · DE
• LEUCHTSTOFFWERK BREITUNGEN GMBH · DE

Inventors

• Benedikt Daumann · Wallersdorf, DE
• Thomas E. Kaib · Irwin, US
• Thomas Bitzer · Villach, AT
• Dominik Uhlich · Bad Liebenstein, DE
• Walter Braumandl · Thurmansbang, DE

Key dates

• Filing date: Jul 26, 2022
• Grant date: Apr 29, 2025
• Expiry date: Jul 26, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G07D7/205
• WIPO field: Control
• WIPO sector: Instruments

Abstract

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.