| 摘要 |
PURPOSE:To make machining of holes of the work sure by setting a combustible material which emits light and burns when irradiated with laser light on the rear side of a material to be worked consisting of a transparent material. CONSTITUTION:A black colored thin paper sheet 3 is affixed on the rear of a material to be worked 1 consisting of a transparent material (methyl methacrylate), and the material to be worked is placed on a stand. Next, the pulse laser light 5 focused through a condenser lens 4 is irradiated to the material 1. When the machining of the hole in the material 1 progresses and the hole penetrates through the work, the thin paper sheet is burned by the laser light 5 and emits light, from which the penetration of the hole is easily confirmed. |
