Precitec Optronik Gmbh

Martin Schöleber

Markus Kogel-Hollacher

The invention relates to a machining head for a laser machining device, which is equipped for machining a workpiece () using laser radiation (). The laser machining head comprises an adjustable focusing optical unit (), which focuses the laser radiation () in a focal spot (). The distance between the focal spot () and a machining head can be modified by modifying the focal length of the focusing optical unit (). A scanning apparatus () deflects the laser radiation () in different directions. An optical coherence tomography device () measures a distance between the treatment head and the workpiece (). Here, measuring light (), which was generated by a measuring light source () and reflected by the workpiece (), interferes in the coherence tomography device () with measuring light, which traveled an optical path length in a reference arm (). A path-length modulator () is disposed in the reference arm () and it updates the optical path length in the reference arm () synchronously with, and dependent on, a change in the focal length of the focusing optical unit ().

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Aschaffenburg, Germany

Martin Schöleber