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

US7648074B2 · kind B2 · utility

Assignee

• GIESECKE & DEVRIENT GMBH · DE

Inventors

• Thomas Attenberger · Poing, DE
• Wolfgang Deckenbach · Schechen, DE
• Rainer Hoppe · Nuremberg, DE

Key dates

• Filing date: Nov 19, 2002
• Grant date: Jan 19, 2010
• Expiry date: Nov 19, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/25
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A value or security document (2) contains a security feature (4) in the form of a film laser with an emitter layer (12) and preferably a protective layer (14). A spatial, periodic modulation (8), 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.