| 摘要 |
An objective lens driving apparatus, in which driving coil blocks 10a, 10b are placed on a stationary base 5 so as to be symmetrical with respect to an objective lens 1 in the direction of a disk radius r. Magnets 3a to 3d are placed on a movable body 4 so as to be on both sides of each of the driving coil blocks 10a, 10b in the direction of a tangent t to a recording track of a disk. Since both sides of the driving coil blocks 10a, 10b can be used for the driving in the focusing, tracking, and radial-tilt directions, the effective part of the coil is doubled, and thus the driving sensitivity can be improved significantly.
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