Method and device for structuring the surface of a hard material coated solid body by means of a laser

US9156107B2 · kind B2 · utility

Assignee

• BOEGLI-GRAVURES SA · CH

Inventors

• Charles Boegli · Marin-Epagnier, CH
• Steffen Weissmantel · Chemnitz, DE
• Günter Reisse · Chemnitz, DE
• Andy Engel · Portola Valley, US
• Rene Boettcher · Lauenhain, DE
• Werner Steffen · Stans, CH

Key dates

• Filing date: Mar 18, 2010
• Grant date: Oct 13, 2015
• Expiry date: Nov 23, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/50
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

In the method for structuring at least one area of a solid body surface provided with a ta-C coating, a mask in the homogenous spot of the optical system is used in order to shape the beam in the mask projection technique and then a diaphragm in front of the imaging optics. A structure is applied by means of an excimer laser having pulse durations in the nanosecond range, a number of mask and diaphragm combinations being arranged in a exchanger device and the exchanger device being adapted to place both one of the masks and one of the diaphragms in the beam path of the laser independently of each other, the masks and diaphragms being arranged in holders while being displaceable linearly or rotatively and rotatable about themselves. This method allows the rational manufacture of very complex, extremely fraud-resistant authentication features and/or of esthetically attractive, optical diffraction effective colored patterns.