| 摘要 |
PURPOSE:To readily detach or attach a lens in a short time by fixedly mounting a containing holder between the laser beam protective cylinder and the position regulating mechanism of a machining nozzle, and detachably attaching the lens through a lens inlet of the side of the holder. CONSTITUTION:A lens 1 is prepared in the state mounted in the primary holder 2. Accordingly, exchange lenses are all with the primary holders 2 of the same size. A guide 8 for specifying the position of the holder 2 in a containing holder 5 is engaged with a recess 8' formed inside the holder 6. When the lens 1 with the holder 2 is mounted in the holder 6 and aligned, the holder 2 is clamped by the primary holder retainer 10 using a thumb screw or the like. Then, the holder 6 is fixed between a protective cylinder 3 of the laser beam emitted to the lens 1 and a regulating mechanism 4 of a machining nozzle. When the lens is detached, it is facilitated through a lens inlet 7 formed on the side of the holder 6. |
