Seal and sealing method

US11056024B2 · kind B2 · utility

Assignees

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US
• OHB System AG · DE

Inventors

• Wolfgang Schade · Jena, DE
• Günter Flachenecker · Hannover, DE
• Markus Thiel · Horgen, CH
• Rainer Rathje · Lilienthal, DE
• Christian Gorecki · Bremen, DE
• Andreas Thoma · Germering, DE

Key dates

• Filing date: Feb 20, 2017
• Grant date: Jul 6, 2021
• Expiry date: Aug 18, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G09F3/206
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a seal containing a substrate which can be applied to an object to be sealed, so that said seal is changed when it is removed without authorization, wherein the substrate contains or comprises a polymer and/or a glass and at least one optical waveguide is arranged in the substrate, at least one first Bragg grating being arranged in said optical waveguide, wherein the substrate has a thickness of less than 200 μm. The invention further relates to a system having a seal of this kind and having an evaluation device, and also to a sealing method.