Patent ID: 11899421
Assignee: TRUMPF LASER- UND SYSTEMTECHNIK GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC G  B  Y | IPC B  G

Claim 0:
1. A method for calibrating a laser scanner for positioning a laser beam in a processing field, the method comprising:
arranging a retroreflector in or above the processing field of the laser scanner and also between a processing sample in the processing field and the laser scanner, wherein the processing field is formed in a powder layer processing chamber;
detecting laser radiation that is reflected back into the laser scanner from the retroreflector as the laser beam passes over the retroreflector;
determining an actual position of the laser beam in the processing field based on the detected laser radiation;
calibrating the laser scanner by correcting a target position of the laser beam specified for the laser scanner in the processing field based on the determined actual position of the laser beam in the processing field;
directing an additional laser beam at an additional processing field formed in the powder layer processing chamber;
detecting additional laser radiation that is reflected back into an additional laser scanner as the additional laser beam passes over the retroreflector;
determining an actual position of the additional laser beam in the additional processing field based on the additional laser radiation detected; and
calibrating the additional laser scanner by correcting a target position specified for the additional laser scanner based on the actual position of the additional laser beam in the additional processing field.