| 摘要 |
PURPOSE:To improve the accuracy of working by making a laser light incident to a slender optical body having a non-solid annular or arbitrary shape thereby emitting the spot of a sharp shape from the other end face and irradiating the same on the work. CONSTITUTION:The laser light 11 released from a laser oscillator 10 transmits through a condenser lens 12 and is made incident to one end face 14 of a transparent pipe 13. The laser light enters a condenser lens 16 from the other end face 15, and is irradiated as an annular spot 18 of an arbitrary size on the work 17. Here, the laser light 11 advances while the laser beam is reflected totally by the wall surface of the pipe 13 and is distributed substantially to the sharp boundary parts of the inside and outside wall surfaces of the pipe 13, by which the sharp annular spot 18 is formed and the work is worked with high accuracy by said spot. |
