Abstract: A description is given of a modular laser processing system (10) for processing a workpiece (20) by means of a processing laser beam (14), which system has a multiplicity of functional modules (100) with a beam passage region (102) which can be connected to one another in series along a processing laser beam path, comprising a functional module (100) embodied as a fiber connection module (104) and serving for accommodating a fiber end from which the processing laser beam (14) emerges, and a functional module (100) embodied as a collimator module (106) and having a collimator lens (16a, 16b, 16c), which collimates the processing laser beam (14), wherein the collimator lens (16a, 16b, 16c) is selected from a group of collimator lenses having different focal lengths which correspond to a raster dimension (L1) or to an integer multiple thereof, characterized in that the length (A) of the beam passage region (102) of a functional module (100) along the processing laser beam path corresponds to the raster dimension

Abstract: Modular laser processing system and functional module A description is given of a modular laser processing system (10) for processing a workpiece (20) by means of a processing laser beam (14), which system has a multiplicity of functional modules (100) with a beam passage region (102) which can be connected to one another in series along a processing laser beam path, comprising a functional module (100) embodied as a fibre connection module (104) and serving for accommodating a fibre end from which the processing laser beam (14) emerges, and a functional module (100) embodied as a collimator module (106) and having a collimator lens (16a, 16b, 16c), which collimates the processing laser beam (14), wherein the collimator lens (16a, 16b, 16c) is selected from a group of collimator lenses having different focal lengths which correspond to a raster dimension (L1) or to an integer multiple thereof, characterized in that the length (A) of the beam passage region (102) of a functional module (100) along the processi

Abstract: The invention relates to a sensor device for detecting radiation from the region of a zone of interaction (16) between a laser beam and a workpiece (17) for monitoring a laser machining operation and a workpiece, in particular a laser welding operation, and a device for monitoring the laser machining operation, in particular the laser welding operation, and a laser machining head having such a sensor device. The sensor device possesses a radiation-sensitive receiver arrangement and an imaging device which images a region to be observed in the region of a zone of interaction (16) onto the receiver arrangement. In order to achieve a compact and space-saving structure it is provided that the imaging device comprises a focusing mirror arranged in the working beam pathway of the laser beam which diverts radiation from the region to be observed out of the working beam pathway and focuses it onto the receiver arrangement.