METHODS AND DEVICE FOR MONITORING A BEAM GUIDING OPTICAL UNIT IN A LASER PROCESSING HEAD DURING LASER MATERIAL PROCESSING

A method and a device for monitoring a beam guiding optics in a laser machining head during laser material machining, wherein a physical parameter of at least one optical element of the beam guiding optics is measured during the laser material machining. The parameter correlates with the degree of s...

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Bibliographische Detailangaben
Hauptverfasser: WECKENMANN, Niklas, BLÁZQUEZ-SÁNCHEZ, David
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method and a device for monitoring a beam guiding optics in a laser machining head during laser material machining, wherein a physical parameter of at least one optical element of the beam guiding optics is measured during the laser material machining. The parameter correlates with the degree of soiling of the at least one optical element. The current focal position is detected for focal position control by a spatially resolving sensor measuring the beam diameter in the region of the focus, and an evaluation circuit determines the current focal position from the output signal of the spatially resolving sensor and outputs an actuating signal for an actuator.