Method for calibrating one or more optical sensors of a laser machining head, laser machining head, and laser machining system

US12313463B2 · kind B2 · utility

Assignee

• Precitec GmbH & Co. KG · DE

Inventors

• Rüdiger Moser · Malsch, DE
• Stefan Birmanns · Bülach, CH
• Tom Walde · Freiburg im Breisgau, DE
• Livia Barazzetti · Wettingen, CH

Key dates

• Filing date: Nov 4, 2022
• Grant date: May 27, 2025
• Expiry date: Jun 22, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B2290/65
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for calibrating at least one optical sensor of a laser machining head is provided. The laser machining head comprises a first optical sensor, a deflection device, and a focusing device. A laser beam path of the first optical sensor passes through the deflection device and the focusing device. The method comprises the steps of: deflecting the beam path of the first optical sensor by the deflection device to a first position on a first reference; generating a first optical measurement signal based on measurement light received by the first optical sensor from the first position on the first reference; and determining a correction value for calibrating the first optical sensor based on the first optical measurement signal and according to a deviation of the first position on the first reference from a first target position, which is specified relative to a position of the machining laser beam.