| 摘要 |
An objective lens driving device is capable of efficiently and quickly correcting the tilt of an objective lens relative to a signal recording surface of an optical disk so that comatic aberration of a spot of a light beam formed on the signal recording surface of the optical disk is reduced. The objective lens driving device for driving an objective lens (1) supported on a support block (6) supports the objective lens (1) by a support device (110) having a pair of support members (122, 124) disposed in a plane (120) perpendicular to the optical axis (1a) of the objective lens (1). First parts (122a, 124a) of the pair of support members (122, 124) are fixed to a lens holder (2) holding the objective lens (1), and second parts (122b, 124b) are fixed to the support block (6). The rigidity, which represent the degree of difficulty in turning the objective lens (1) about an axis perpendicular to the optical axis (1a) of the objective lens (1) and longitudinal axis of the support member (122, 124), of the first part (122a, 124a) of each support member (122, 124) is lower than that of the second part (122b, 124b) of the same support member (122, 124) connected to the support block (6).
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