| 摘要 |
PROBLEM TO BE SOLVED: To enable laser beam cutting for a highly transparent acrylic plate without soiling or damaging a condensing lens. SOLUTION: In the case of laser beam cutting where an acrylic plate W is irradiated with a laser beam LB from a laser nozzle 9 provided at the tip end of the machining head 3, with a cutting gas jetted for cutting, the gas is jetted from escape holes 19A-19D, which are formed on the outer circumference of the nozzle hole 9H of the laser nozzle 9 in the machining head body 3. |
