| 摘要 |
PURPOSE:To prevent the breakdown of a resonator and optical system by making a condensed laser light incident at a fixed angle on the slope line of the face to be worked passing a focus and absorbing the reflection light to a light absorbing body axisymmetrically with respect to the incident light. CONSTITUTION:A laser light 2 is made incident apart further than the beam radius of an incident light 4 from the center line of a lens 6 via a reflection mirror 3 and in parallel to a slope line 7. The reflection light 8 is absorbed by the damper 9 installed between the lens 6 and reflection mirror 3. With the device of this composition, the breakdown of a resonator and optical system due to the reflection light can be prevented in case of working a high reflection factor material. |
