| 摘要 |
A laser beam machining apparatus includes: a laser beam oscillator; a beam adjusting unit which is disposed between the laser beam oscillator and a condenser lens and by which the beam diameter and the divergence angle of the laser beam oscillated from the laser beam oscillator are adjusted; and a beam diameter and divergence angle detecting unit for detecting the beam diameter and the divergence angle of the laser beam having passed through the beam adjusting unit. The laser beam machining apparatus further includes a control unit which computes the beam diameter and the divergence angle of the laser beam oscillated from the laser beam oscillator, based on detection signals from the beam diameter and divergence angle detecting unit, and which controls the beam adjusting unit, based on the computed beam diameter and divergence angle of the laser beam oscillated from the laser beam oscillator and the beam diameter and the divergence angle of the laser beam incident on the beam diameter and divergence angle detecting unit.
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