Patent ID: 11865770
Assignee: CONCEPT LASER GMBH
Field: Other special machines (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A method of calibrating an irradiation device of an apparatus for additively manufacturing three-dimensional objects, the method comprising:
generating a first calibration pattern on a first determination region of a build plane, the first calibration pattern generated with a first energy beam emitted by a first irradiation unit of the irradiation device;
generating a second calibration pattern on a second determination region of the build plane, the second calibration pattern generated with a second energy beam emitted by a second irradiation unit of the irradiation device;
collecting, via an optical sensor, a first image of the first calibration pattern on at least one part of the first determination region of the build plane and a second image of the second calibration pattern on at least one part of the second determination region of the build plane, the first image generated by a second on-axis determination unit of the second irradiation unit, the second image generated by a first on-axis determination unit of the first irradiation unit, wherein at least one reflected part of the first energy beam emitted from the build plane is guided via a first beam guiding unit to a determination element of the first on-axis determination unit;
determining calibration information comprising a first position of the first calibration pattern within the first determination region on the basis of the first image, and a second position of the second calibration pattern within the second determination region on the basis of the second image; and
determining a calibration status of at least one of the first irradiation unit and the second irradiation unit, the calibration status determined based at least in part on the calibration information.