| 摘要 |
PURPOSE:To improve the quality of laser beam by providing a plurality of laser beam oscillators linearly polarized in directions which do not run parallel with each other and arranging an optical system to superpose radiated laser beams. CONSTITUTION:There are provided laser beam oscillators 1, 4 having their respective linearly polarized elements 13, 14 and arranged a beam synthesized element 6 composed of beam slitters, etc. The laser beam 2 radiated from the laser beam oscillator 1 is a linearly polarized element 13, polarized in a direction shown by an arrow 11 and a beam 5 of the oscillator 4 is polarized by the element 14 in the direction of an arrow 12. Then, the polarized beams 2, 5 which do not run parallel with each other are synthesized by a synthesized optical element 6 into a beam 7 to machine a work 10. Since the beams 2, 5 do not interfere with each other, the superposed laser beam 9 becomes nearly similar in shape and stronger in strength. Accordingly, the quality laser beam is improved. |
