| 摘要 |
PROBLEM TO BE SOLVED: To suppress the vibration of a movable part at a low cost. SOLUTION: In an objective lens driving device, which is provided with a movable part 8 furnished with an objective lens 1 which forms a light spot and a driving coil 5, a fixed member 11 which is fixed on a base 9, a plurality of rod shaped elastic supporting members 3 which are fixed on the movable part 8 on one side and fixed on the fixed member 11 on the other side and elastically support the movable part 8 with respect to the base 9, driving magnets 13a and 13b which, in combination with yokes 10a and 10b furnished on the base 9, form a magnetic circuit 12 for the driving coil 5, the objective lens 1 is arranged at one end of the movable part 8, a mass balancer 7 with which the mass center position of the movable part 8 is adjusted is fixed at the other end part of the movable part 8, which is a position symmetry to the objective lens with respect to the mass center position of the movable part 8 with an adhesive S which keeps elasticity even after applied.
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