| 摘要 |
Disclosed is a system ( 10 ) for regulating the power of a laser beam ( 12 ). The system ( 10 ) comprises a first transparent plate ( 16 ) that is arranged in the light path of the laser beam ( 12 ) and can rotate about a first axis ( 18 ), that is perpendicular to the light path, a first drive device ( 20 ) for rotating the first transparent plate ( 16 ) about the first axis ( 18 ), a measurement device ( 34 ) for detecting the power of the laser beam ( 12 ') downstream of the first transparent plate ( 16 ) and for generating an actual power value, and a regulating device ( 44 ) with an input ( 46 a) that is connected to the measurement device ( 34 ), and an output ( 46 b) that is connected to the first drive device ( 20 ), the regulating device ( 44 ) receiving the actual power value and a desired power value and generating a control value which it outputs, wherein the first drive device ( 20 ) rotates the first transparent plate ( 16 ) depending on the control value, in order to minimize the difference between the actual power value and the desired power value.
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