Laser cutting torch

摘要

The choices of lenses could be broadened when using lenses of different focus distance and a reduction of size could be accomplished and thus an operation could be made easier by providing a laser-cutting torch in which the laser-cutting torch receives a laser light emitted from a laser oscillator and irradiates the laser light through a nozzle for cutting a targeted cut material. A laser-cutting torch A having: a revolving movable structure with a primary optical axis la as a center in which the primary optical axis 1a is vertical to the targeted cut material B, a parallel secondary optical axis 2a and a fourth optical axis 4a arranged in a horizontal direction perpendicularly intersecting with the primary optical axis 1a in which the secondary optical axis 2a and the fourth optical axis 4a serves as a center for pivotal movement; a primary reflection mirror 7 for receiving a laser light; a plurality of reflection mirrors 9,10; a secondary reflection mirror 8 arranged facing a nozzle 6; wherein the laser-cutting torch is structured to set an angle of the nozzle 6, and to set an arrangement of an intersecting point between the primary optical axis 1a and the targeted cut material B in which the primary optical axis 1a is perpendicular to a laser light irradiated from the nozzle 6 or to set an arrangement displaced to a prescribed length apart from the intersecting portion during the pivotal movement of the optical axes 2a and 4a; wherein the primary reflection mirror 7 and the secondary reflection mirror 8 have a lens 21 arranged in between.