| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser beam machining device capable of obtaining excellent machining laser beams with Gauss distribution even when the mode of the beams emitted from a laser beam oscillator is low order or high order. <P>SOLUTION: A plurality of reflection mirrors 3-3 as lateral mode improving means are provided in the optical path length from an outgoing port 2a of a laser beam oscillator 2 to an incoming port 4a of a beam expander 4, and the optical path length to generate the TEM00 mode is ensured by successively returning the travel direction of laser beams by the reflection mirrors. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
