LASER PROCESSING HEAD WITH MONITORED PIVOTING UNIT FOR SWITCHING COLLIMATING LENSES

A laser machining head (30) comprises: a beam guide housing (111) for a laser beam (5) propagating along a beam axis (LA); -a pivot unit (112), which comprises a pivot axis (41) and a pivot frame (6), which is rigidly fixed to the pivot axis (41) and is arranged in the beam guide housing (111); an adjusting mechanism (34), by means of which the pivot unit (112) can be rotated about a pivot axis (41) relative to the beam guide housing (111); -at least two collimating lenses (2, 9), which are fixed on the pivot frame (6) and which can be selectively brought into the beam axis (LA) of the laser beam (5) by rotation of the pivot unit (112); and at least one focusing lens (102) in the beam axis (LA) of the laser beam (5), characterized in that the laser processing head (30) has a monitoring device (106) by means of which the temperature of the pivot unit (112) can be measured. The invention relates to a laser machining head, by means of which, in particular, possible inaccuracies during laser machining at high las