Abstract: A method of analyzing a welded connection during laser welding of workpieces includes acquiring a first measurement signal for a process radiation generated during laser welding, acquiring a second measurement signal for a laser radiation reflected by the workpieces, determining whether there is a gap between the workpieces based on the first measurement signal, and when it is determined that there is a gap, determining based on the second measurement signal whether there is a welded connection.

Abstract: A measuring device determines a distance between a processing head for a laser processing system configured to process a workpiece with a laser beam and the workpiece. The measuring device includes an optical coherence tomograph to measure a distance between the processing head and workpiece. In the optical coherence tomograph, measuring light generated by a measuring light source and reflected by the workpiece interferes with measuring light reflected in a reference arm with two or more reference stages. The stages include a first reference stage configured such that the measuring light reflected therein travels a first optical path length, and a second reference stage configured such that the measuring light reflected therein travels a second optical path length different from the first length, wherein the measuring light reflected by the workpiece interferes with reflected measuring light of the first reference stage and reflected measuring light of the second reference stage.

Abstract: A method for comparing laser machining systems is provided, wherein a laser machining system comprises a laser machining head and a sensor module having at least one photodiode for detecting process radiation, said method comprising: detecting radiation emitted from a light source by means of the photodiode and generating a corresponding intensity signal, wherein the radiation is guided from the light source to the photodiode by at least one optical element in the laser machining head and/or by at least one optical element of the sensor module; aligning the laser machining head and the light source with one another so that the intensity signal assumes a maximum value; and comparing the intensity signal with at least one predetermined reference value. A method for monitoring a laser machining process and an associated laser machining system are also provided.

Abstract: An alignment module coupling a sensor unit to a laser machining device for monitoring a laser machining process is provided. The module includes a first coupling device with a first optical input for a process radiation coupled out of the laser machining device and a coupling element for coupling to the machining device; a second coupling device with a first optical output and a coupling element for coupling to the sensor unit; a first adjustment module arranged between the first and second coupling devices and configured to tilt and/or displace the coupling devices with respect to one another; and a focusing optics between the first optical input and the first optical output, which is slidably disposed along the optical axis of the focusing optics. A sensor module monitoring a laser machining process is provided, which includes the alignment module. A laser machining system is also provided, including the sensor module.

Abstract: The invention pertains to a laser machining system includes first deflection optics, second deflection optics, and a coupling device. The first deflection optics deflect a machining laser beam in two directions in space. The second deflection optics deflect a measuring beam in two directions in space independently of the machining laser beam. The coupling device is arranged in a beam path of the machining laser beam and couples the measuring beam into the beam path of the machining laser beam.

Abstract: The invention pertains to measuring, adjusting and/or controlling a distance between a machining head, particularly a laser machining head, and a workpiece, comprising a measurement light source, a beam splitter that splits the light of the measurement light source into a measurement light beam and a reference light beam, a reference arm, through which the reference light beam is guided, an optical system for coupling the measurement light beam into a processing beam path featuring a focusing lens, an optical device for superimposing the measurement light beam, and a measurement and evaluation unit.

Abstract: Embodiments pertain measuring the weld penetration depth, particularly in welding, drilling or machining processes carried out by means of a working laser beam, wherein a measurement light beam of a sensor system is coupled into a processing beam path of the working laser beam in a laser machining head and bundled or focused into a measurement light spot on the surface of a workpiece by means of focusing optics of the processing beam path. The measurement light beam reflected on the surface of the workpiece is then returned to a measurement and evaluation unit of the sensor system in order to obtain information on the distance of the surface of the workpiece from the laser machining head.

Abstract: A measuring device determines a distance between a processing head for a laser processing system configured to process a workpiece with a laser beam and the workpiece. The measuring device includes an optical coherence tomograph to measure a distance between the processing head and workpiece. In the optical coherence tomograph, measuring light generated by a measuring light source and reflected by the workpiece interferes with measuring light reflected in a reference arm with two or more reference stages. The stages include a first reference stage configured such that the measuring light reflected therein travels a first optical path length, and a second reference stage configured such that the measuring light reflected therein travels a second optical path length different from the first length, wherein the measuring light reflected by the workpiece interferes with reflected measuring light of the first reference stage and reflected measuring light of the second reference stage.

Abstract: The invention pertains to a laser machining system that comprises first deflection optics, which are designed for deflecting a machining laser beam in two directions in space, second deflection optics, which are designed for deflecting a measuring beam in two directions in space independently of the machining laser beam, and a coupling device, which is arranged in a beam path of the machining laser beam and designed for coupling the measuring beam into the beam path of the machining laser beam.

Abstract: Embodiments pertain measuring the weld penetration depth, particularly in welding, drilling or machining processes carried out by means of a working laser beam, wherein a measurement light beam of a sensor system is coupled into a processing beam path of the working laser beam in a laser machining head and bundled or focused into a measurement light spot on the surface of a workpiece by means of focusing optics of the processing beam path. The measurement light beam reflected on the surface of the workpiece is then returned to a measurement and evaluation unit of the sensor system in order to obtain information on the distance of the surface of the workpiece from the laser machining head.

Abstract: The invention pertains to measuring, adjusting and/or controlling a distance between a machining head, particularly a laser machining head, and a workpiece, comprising a measurement light source, a beam splitter that splits the light of the measurement light source into a measurement light beam and a reference light beam, a reference arm, through which the reference light beam is guided, an optical system for coupling the measurement light beam into a processing beam path featuring a focusing lens, an optical device for superimposing the measurement light beam, and a measurement and evaluation unit.