Device for monitoring a process during laser machining, comprising an optical distance measuring device and a prism polarization unit, and a laser processing head equipped with the device

摘要

The invention relates to a device for process monitoring during laser processing, in particular during laser welding and deep laser welding, comprising an optical distance measuring device having a measurement light source for generating a measurement light beam (14), which is focused onto a workpiece surface in order to form a measurement light spot, and comprising a prism deflection unit (24) having at least one prism (22) which is mounted rotatably about an axis (28) running transversely with respect to the measurement light beam (14) and which laterally deflects the measurement light beam (14) for positioning the measurement light spot on the workpiece surface.