US 11,850,798 B2
Determination device for determining at least one parameter of an energy beam
Christian Dicken, Weidenberg (DE); and Thomas Schulz, Gerach (DE)
Assigned to Concept Laser GmbH, Lichtenfels (DE)
Filed by CONCEPT LASER GMBH, Lichtenfels (DE)
Filed on Mar. 6, 2019, as Appl. No. 16/294,848.
Claims priority of application No. 18202970 (EP), filed on Oct. 26, 2018.
Prior Publication US 2020/0130279 A1, Apr. 30, 2020
Int. Cl. B29C 64/386 (2017.01); B33Y 30/00 (2015.01); B33Y 50/00 (2015.01); B23K 26/064 (2014.01); B23K 26/342 (2014.01); B23K 26/70 (2014.01); B29C 64/268 (2017.01); B23K 26/03 (2006.01); B23K 26/067 (2006.01); B28B 1/00 (2006.01)
CPC B29C 64/386 (2017.08) [B23K 26/032 (2013.01); B23K 26/064 (2015.10); B23K 26/067 (2013.01); B23K 26/342 (2015.10); B23K 26/705 (2015.10); B28B 1/001 (2013.01); B29C 64/268 (2017.08); B33Y 30/00 (2014.12); B33Y 50/00 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A determination device arranged in a beam path of an energy beam generated via an irradiation device of an apparatus for additively manufacturing three-dimensional objects, the determination device comprising:
a first determination unit comprising one or more first pattern elements;
a second determination unit comprising one or more second pattern elements;
a beam splitter and a screen, the beam splitter disposed between the first and second determination units and the screen such that the energy beam is guided from the first and the second determination units to the beam splitter and then to the screen, the screen configured to emit radiation upon receiving irradiation of the energy beam from the beam splitter;
a camera comprising an optical sensor configured to receive the radiation emitted from the screen, wherein the optical sensor is configured to generate a pattern corresponding to a portion of the energy beam passing through each the first determination unit, the second determination unit, the screen, and the beam splitter by a presence or absence of one or more light gaps in the pattern, indicating an alignment or a misalignment of the energy beam;
wherein the first and the second determination units are arranged in succession in a beam path of the energy beam generated by the irradiation device, and wherein at least one of the one or more first pattern elements and at least one of the one or more second pattern elements are arranged together with respect to each other to form the pattern.