| 摘要 |
PURPOSE:To surely judge a cutting condition by parallel observing the radiation light of another wavelength from the wavelength of the radiation light from a cutting part. CONSTITUTION:An optical fiber 3 for transmitting a YAG laser and plural pieces of small-diameter optical fibers 4 for monitoring for transmitting the radiation light are connected to a laser cutting tool 2. A material 1 to be cut is irradiated with the YAG laser directionally changed by a reflection mirror 7 via an exit hole 8 on the side face of a tool body 5. The complete cut off of the material 1 to be cut is judged if the radiation light of the same wavelength lambda1, of the exit light 9 and the specific wavelength lambda2. radiated when the material to be cut melts are monitored. |
