| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact mirror holder device which can adjust a reflecting mirror finely and stably with ease and has a lock function for stably maintaining the adjustment state. SOLUTION: The mirror holder device 31 is constituted by embedding plural magnetic materials 35 in its outer peripheral surface and providing the reflecting mirror 46 at a flat part 33A, and makes a split spherical member 33 having a rod member 41 stood at its upper end part 33B abut against the inner peripheral surface of a casing 32 by biasing it with a spring 36 clamped with a bolt 39 and a nut 40 between a spherical washer 37 and a flat washer 38. When the reflecting mirror 46 is cleaned or replaced, the split spherical member 33 released from the easing 32 by releasing the attracting force of the magnet member 34 by switching a lever 34A is made with the biasing force of the spring 36 to abut against the casing 32 with proper resistance, thereby holding the angleθof incidence of laser beam 47 adjusted by a 1st adjusting screw member 43 and a 2nd adjusting screw member 44 by abutting against the rod member 41. |
