| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser beam machine in which the inside of a transmission optical path is not contaminated by dust at the time of nonuse, and laser beams from a laser oscillator can be emitted in an always stable state at the time of operation, the cutting quality of a work is made satisfactory, and the period of washing for optical instruments or the like can be extended. <P>SOLUTION: In the laser beam machine 10, the laser beams La from the laser oscillator 21 are made into convergent laser light Lz via a machining head 1 equipped with a lens holder 2 holding a condenser lens 23, and the work M is machined. The laser beam machine 10 is provided with an air sending part 25 for cooling and dust removal. wherein an opening light projecting board 5 at the time of the operation and a closed shielding board 6 at the time of the nonuse and the halt of the operation are installed to be exchangeably attached in light incident path 2a on the upstream side of the condenser lens 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
