| 摘要 |
PURPOSE:To form the small diameter of a beam at an arbitrary position, by providing a plurality of lenses and a mechanism, which adjusts the gap between the lenses, in a mirror supporting body on the output side of light. CONSTITUTION:In a mirror supporting part 1, two pieces of a concave lens 5 and a convex lens 8, a spacer 4 and a spring 6 are inserted and fixed with a lens fixing screw 7. The diameter of a laser light beam, which is outputted from a mirror 2 on the output side, is expanded according to the curvature of the concave lens 5 and further converged according to the curvature of the convex lens 8. The curvatures of the lenses 5 and 8 and the distance between the lens 5 and the lens 8 are determined by the positions of the required focal points and the diameter of the converged beam. Thus the beam having the small diameter can be formed at an arbitrary position. |
