| 摘要 |
An objective lens actuator of the present invention is an actuator capable of driving an objective lens which condenses a laser beam on an information recording surface of an optical disk, in each of a focusing direction, a tracking direction and a radial tilt direction. The actuator comprises a fixed unit including first and second magnets, and a moving unit which is arranged between the first and second magnets and which includes the objective lens, focusing coils, tracking coils, and a radial tilt coil. Each of the magnets is divided into four areas and being magnetized such that adjacent areas have opposite poles N and S, respectively. A direction of the magnetization is orthogonal to the focusing direction and tracking direction.
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