| 摘要 |
PURPOSE:To maintain a gas space always clean and to obtain a stable laser beam of a high output by connecting a gas supplying means via control valves in the processing device of a laser oscillator having ducts which allow the passage of the laser beam and expand and contact according to the movement of an optical mechanism. CONSTITUTION:The inside space in the duct on the expanded side expands and therefore, a negative pressure is generated in this state when the ducts 6a, 6b expand and contract during the movement of the optical mechanism. Since the gas supplying means is connected to the ducts via the control valves 15a, 15b of this device, the gas is supplied from the gas supplying means by opening the control valve of the duct on the expanded side and the gaseous pressure in the ducts is thereby maintained at a positive pressure. The suction of the contaminated outdoor air into the duct on the expanded side is, therefor, obviated and the gaseous space in the device is maintained always clean. The possibility that the laser beam is scattered by suspended dust and oil-components is eliminated in this way and the stable laser beam of the high output is obtd. |
