Patent ID: 11925999
Assignee: TRUMPF LASER- UND SYSTEMTECHNIK GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 28:
29. A method of processing a workpiece, the method comprising:
generating a beam having a source power,
splitting the source power of the beam between a reference path, which comprises a retroreflector arranged within the reference path, and a measurement path,
detecting a total power of the beam, wherein the beam comprises a first beam that is redirected by the workpiece along the measurement path and a second beam that is redirected by the retroreflector along the reference path, wherein the first beam and the second beam interfere with one another, and
controlling a ratio between a power portion of the detected beam redirected from the workpiece and a power portion of the detected beam redirected from the retroreflector to a target ratio by adjusting the power portion of the total power of the beam redirected from the retroreflector to the detector, during processing of the workpiece,
wherein adjusting the power portion of the total power of the beam redirected from the retroreflector comprises at least one of attenuating the power portion of the beam in the reference path, and
wherein attenuating the power portion of the beam in the reference path comprises changing a focus position of the beam in the reference path.