Laser processing apparatus and laser processing method

A laser processing apparatus comprising:

• control circuitry configured to control laser processing in accordance with a processing condition for the laser processing;
• a detector configured to observe, on a time-series basis, at least one of sound or light generated during execution of the laser processing as a processing state during execution of the laser processing and output a signal corresponding to an observation result as a time-series signal;
• parameter estimation circuitry configured to estimate, on a basis of first time-series signal data and corresponding parameter information, a parameter value, included in the processing condition and targeted for update, that corresponds to the first time-series signal data, and output the estimated parameter value as a parameter estimate, the first time-series signal data including at least one of the time-series signal or a first feature computed from the time-series signal, the corresponding parameter information being preset in the parameter estimation circuitry and being information indicating correspondence between the first time-series signal data and the parameter value included in the processing condition and targeted for update;
• condition change amount determination circuitry configured to compare a target parameter value that is a target value for the parameter value and the parameter estimate and determine an amount of change for the parameter value of the processing condition to bring the parameter estimate closer to the target parameter value, on a basis of a comparison result;
• and
• parameter update circuitry configured to update the processing condition by changing the parameter value on a basis of the amount of change and the processing condition,
• wherein the control circuitry is configured to control the laser processing in accordance with the processing condition including the parameter value updated by the parameter update circuitry, and
• wherein during the laser processing, the detector, the parameter estimation circuitry, the condition change amount determination circuitry, and the parameter update circuitry are configured to sequentially and repeatedly perform detection of the time-series signal, output of the parameter estimate based on the corresponding parameter information that is preset, determination of the amount of change, and update of the parameter value of the processing condition.