| 摘要 |
To provide a protection barrier, which includes an inlet from which laser light emitted from a laser device enters; an outlet from which the laser light is output towards an irradiation target; and a unit configured to prevent a leakage, where the unit is configured to reduce an intensity of the laser light leaked from the protection barrier, wherein the protection barrier is configured to surround a light path of the laser light emitted from the laser device. |
