| 摘要 |
PURPOSE:To eliminate excessive higher-order vibration of an objective lens, and to improve the fixation accuracy by executing the positioning by using a fixing hole and a fixing wedge, when fixing a supporting spring of the objective lens to a fixing member. CONSTITUTION:A body to be driven 2 to which an objective lens 1 is attached is supported by a supporting spring 3 in the focusing direction and a supporting spring 4 in the tracking direction. As for the supporting spring 3, both ends are fixed to a fixing and supporting member 5 and an intermediate fixing and supporting member 6, and as for the supporting spring 4, both ends are fixed by the body to be driven 2 and the supporting member 6. When fixing the supporting springs 3, 4, they are inserted into a spring inserting hole, and thereafter, positioned by using a wedge 9 being a fixing auxiliary member. Therefore, the excessive higher-order vibration of the lens 1 is suppressed small, and the fixation accuracy can be improved. |
