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1. (WO2013110467) LASER MACHINING HEAD WITH FOCUS CONTROL

Pub. No.:    WO/2013/110467    International Application No.:    PCT/EP2013/000228
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Sat Jan 26 00:59:59 CET 2013
IPC: B23K 26/04
Applicants: PRECITEC GMBH & CO. KG
Inventors: SCHÜRMANN, Bert
STORK, Ingo genannt WERSBORG
Title: LASER MACHINING HEAD WITH FOCUS CONTROL
Abstract:
The invention relates to a laser machining head (10) for machining a workpiece (12) by means of a working laser beam (14), comprising: a beam-forming optical system (32) for collimating a working laser beam (14) exiting from a fibre end (26) of an optical fibre (24), the fibre end (26) being situated inside a beam-forming optical imaging area (30); a focusing optical system (18) for focusing the working laser beam (14) onto the workpiece surface (20) or onto a defined position relative to the workpiece surface; and a camera (38) with an adjustable imaging optical system (40) arranged upstream thereof in the beam path (36, 46), wherein a machining area of the workpiece is imaged onto a first sensor area (42) of the camera (38) by a first observation beam path (36) via the focusing optical system (18) and the imaging optical system (40), and the beam-forming optical imaging area (30) is imaged onto a second sensor area (42) of the camera (38) by a second observation beam path (46) via the beam-forming optical system (32) and the imaging optical system (40).