Patent · US Active

Diffractive optical beam shaping element

US10620444B2 · kind B2 · utility

10Cited by

15References

26Claims

0Family size

Assignee

TRUMPF LASER- UND SYSTEMTECHNIK GMBH · DE

Inventors

Malte Kumkar · Weimar, DE
Daniel Grossmann · Schramberg, DE
Daniel Flamm · Walnut Creek, US

Key dates

Filing date	May 19, 2017
Grant date	Apr 14, 2020
Priority date	—
Expiry date	Sep 21, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02B27/425
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A diffractive optical beam shaping element for imposing a phase distribution on a laser beam that is intended for laser processing of a material includes a phase mask that is shaped as an area and is configured for imposing a plurality of beam shaping phase distributions on the laser beam incident on to the phase mask. A virtual optical image is attributed to at least one of the plurality of beam shaping phase distributions, wherein the virtual image can be imaged into an elongated focus zone for creating a modification in the material to be processed. Multiple such elongated focus zones can spatially add up and interfere with each other, to modify an intensity distribution in the material and, for example, generate an asymmetric modification zone.

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