Abstract: The invention relates to a method and a device for the analysis of energy beams in systems for the additive manufacture of components (70) by means of layered solidification of a construction material (55) by an energy beam (30). The invention enables a determination of position-related beam data directly with respect to the processing point during the machining process. An additive manufacturing system includes a beam deflecting device (40), a processing plane (45), and a layer applicator (60). The device according to the invention comprises a movable beam barrier (17), a movable beam sampling module (20) and a measuring device (10) with a radiation detector (12).

Abstract: The invention relates to a method and an apparatus for the direct determination of spatial dimensions of a light beam with high precision and short measuring period, which are also suitable for the measuring of laser beams with high power in the range of the beam focus. For this purpose, an apparatus is proposed that includes a beam scanner (20), at least one light sensor (60), a movement device (50) for the execution of a relative movement between the light beam (10) and the beam scanner (20), and a device (64) for the signal recording of a temporally variable signal of the light sensor (60). The beam scanner (20) comprises at least one scanning body (21) with at least three sampling areas (22), which extends along sampling lines. The sampling areas (22) are configured for the extraction of linear or strip-shaped light samples from a cross-section (14) of the light beam (10).

Abstract: Apparatus for determining geometrical parameters of a laser beam includes an optical system, a device for output coupling radiation, a beam diagnostic device, and a reflector element. The optical system focuses the laser beam into a processing region. The device for output coupling radiation couples out radiation that runs through the optical system in a direction opposite to a direction of the laser beam. The reflector element has a first surface which is partially reflecting and curved, where the curvature is equal to a mean curvature of a wave front of the laser beam in a positioning region of the reflector element.

Abstract: An apparatus for the determination of geometric parameters of a laser beam, such as, for example, the beam diameter or the focus diameter. The apparatus includes a device for the emission of a laser beam into an active region, a detector arrangement, which can be positioned in the active region, a device for the provision of a relative movement between the laser beam and the detector arrangement, and a device for the registration and evaluation of a temporally varying signal of the detector arrangement. The detector arrangement includes at least one light guide, at least two flight-diffusing structures, and at least one light-sensitive sensor. The light guide has a light-emitting surface and a light-conducting region, with an elongated shape. The at least two light-diffusing structures are essentially extended along two different directions.

Abstract: An apparatus for the determination of geometric parameters of a laser beam, such as, for example, the beam diameter or the focus diameter. The apparatus includes a device for the emission of a laser beam into an active region, a detector arrangement, which can be positioned in the active region, a device for the provision of a relative movement between the laser beam and the detector arrangement, and a device for the registration and evaluation of a temporally varying signal of the detector arrangement. The detector arrangement includes at least one light guide, at least two flight-diffusing structures, and at least one light-sensitive sensor. The light guide has a light-emitting surface and a light-conducting region, with an elongated shape. The at least two light-diffusing structures are essentially extended along two different directions.

Abstract: Apparatus for determining geometrical parameters of a laser beam includes an optical system, a device for output coupling radiation, a beam diagnostic device, and a reflector element. The optical system focuses the laser beam into a processing region. The device for output coupling radiation couples out radiation that runs through the optical system in a direction opposite to a direction of the laser beam. The reflector element has a first surface which is partially reflecting and curved, where the curvature is equal to a mean curvature of a wave front of the laser beam in a positioning region of the reflector element.