| 摘要 |
PROBLEM TO BE SOLVED: To prevent heating of ambient members by reducing reflection and scattering of laser light. SOLUTION: An aperture 9 for reducing the diameter of a laser beam R, emitted from the end in the axial-direction of a laser rod through an opening 10. The aperture is made of a material through which the beam R can transmit, both surfaces of an edge 11 for reducing an excessive laser light Ra to reduce the diameter of the beam are provided as incident surfaces 12 perpendicular to the laser light R, and a notch having reflection surfaces 13 which totally reflects the laser light Ra entered from the planes 12 of incidence toward a prescribed interior.
|
