Abstract: An insulator for a sensor arrangement of a laser processing machine comprises an outer insulating part of plastics material for electrical shielding and an inner shielding part of a non-conductive heat-resistant material for shielding against laser irradiation and/or heat.

Abstract: An optical module adjusts an output of a laser of a laser processing machine. The optical module consists essentially of an adaptive spherical mirror configured to receive a laser beam from the laser, and a spherical mirror configured to receive a laser beam reflected from the adaptive mirror. Both the adaptive mirror and the spherical mirror have a phase-shifting coating such that the laser beam reflected from the spherical mirror has a circular polarization.

Abstract: A laser processing machine head, a laser processing machine head monitoring system, and a method of monitoring an optical element of a laser processing machine feature a light-transmissive optical element and an optical element holder defining a cavity in which the optical element is retained against rotation. A light source mounted to the holder directs a beam of light into the optical element through a peripheral surface of the optical element. A light receiver is responsive to light from the light source reflected through the optical element. Monitoring a signal from the light receiver allows a status of the optical element to be assessed.

Abstract: On laser cutting machines the laser cutting head is movable relative to the laser generator, respectively relative to the workpiece to be cut, in a plane parallel to the workpiece by means of a drive controlled by a numerical control. The laser cutting head also has an adjusting device for adjusting the focal position of the laser beam, by means of which the focus can be shifted with respect to the laser cutting head perpendicular to the workpiece. The position of the laser beam focus perpendicular to the workpiece influences the cutting quality obtained, respectively the resulting cutting characteristics. A laser cutting machine which is functionally efficient under workshop conditions and suitable for automatic operation, for which a sure optical adjustment of the focal position is possible, has not been available up to now. The new laser cutting machine should eliminate this problem.