| 摘要 |
PURPOSE:To provide the title condensing device that the laser light combination can be formed without using an optical condenser lens and is easy in the maintenance work of the condensing system, made by providing the heating means to partially heat the gaseous body inside a duct in the vicinity of the condensing system in a laser optical path duct. CONSTITUTION:With the electrification of the heating coil 4b of a heating part 4a, the gaseous body inside the optical path duct 2 near the heating part 4a is heated and expanded by the heating of the heating coil 4b. The gaseous body molecule density is made in a denser state than the density of other part inside the duct 2 by this expansion of the gaseous body, the condensation and rarefaction state of the gaseous body is caused inside the duct 2 near the heating part 4b and the refraction factor distribution of the laser light 1a is spaciously caused. When, therefore, the laser light 1a projected from a laser light oscillator 1 is transmitted to a bend mirror 3 through the duct 2, it is deflected to a spacious refraction distribution zone. Consequently the laser light 1a is condensed in the refraction factor distribution zone and can be converged to the spot having the necessary energy for working on the body 5 to be worked. |
