| 摘要 |
PURPOSE: To coaxially position plural laser beams by interrupting one of the plural laser beams and directing it along a single axis determined by another laser beam by a rotary deflector means. CONSTITUTION: Laser energy of a first laser oscillator 21 is transmitted in a pulse beam 26 and matches with an axis 10. Laser energy of a second laser oscillator 22 propagates along a first optical path 30, is reflected by a reflection mirror 32, and propagates along a second optical path 34. The second optical path 34 and an optical path of the beam 26 of the first laser oscillator intersect in an intersecting region 36 at a right angle. A reflection means 40 having a plurality of blades 50 is provided in the intersecting region 36 and is made to turn. When a blade 50 comes, the laser energy of the second laser oscillator 22 is reflected and is made to project on an object 12. When a void comes, the laser energy of the first laser oscillator 21 is made to pass as it is to project on an object 12. Only during the projection, the oscillators 21, 22 are set to work. |
