Patent · US Active

Device and method for laser-based separation of a transparent, brittle workpiece

US11712754B2 · kind B2 · utility

0Cited by

1References

14Claims

0Family size

Assignee

Schott AG · DE

Inventors

Jens Ulrich Thomas · Mainz, DE
Frank-Thomas Lentes · Bingen, DE
Andreas Ortner · Gau-Algesheim, DE

Key dates

Filing date	Oct 14, 2019
Grant date	Aug 1, 2023
Priority date	—
Expiry date	Mar 8, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/54
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The present disclosure provides a device and a method for laser-based separation of a transparent, brittle workpiece, comprising a laser that emits a laser beam having an intensity (IL) along an optical axis (P), and an optical device. The optical device has at least one one-piece double axicon. The double axicon has an entrance surface and the optical device has an exit surface. The entrance surface is such that in the double axicon, a ring beam is formed. The intensity (IL) in the double axicon is lower than the threshold intensity (IS) of the material of the double axicon. The exit surface is such that a line focus having a maximum intensity (Imax) and a length (LT) is generated in the direction of the laser beam behind the exit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.