| 摘要 |
PURPOSE:To obtain good cutting quality by placing a processing head for cutting of a combined CO2 laser beam processing machine to the final position on an optical path and placing an optical system for polarizing circularly the linearly polarized light just before said processing head. CONSTITUTION:The combined CO2 laser beam processing machine is so constituted that the linearly polarized beam 1 of the direction (a) outputted from a laser oscillator is polarized to the circularly polarized beam 4 by the optical system 3 for circular polarization on the optical path. The laser light 1 is reflected by a bent mirror 2 movable in the direction (b) perpendicular to the optical axis to process the work in the stage of a heat treatment such as hardening or welding. On the other hand, the mirror 2 is removed off the optical axis and the work is processed by reflecting the laser light 4 by a bent mirror 5 in the stage of cutting. The combined laser beam processing machine adequate for cutting is thus obtd. |
