| 摘要 |
In order to simplify operation control and achieve smaller-sized apparatuses, the present invention provides an object lens drive apparatus having a fixed block, a movable block holding an objective lens, support springs connecting the fixed block and the movable block, a focusing coil, tracking coils, a tilt coil, first magnets constituting a first magnetic circuit, and a second magnet constituting a second magnetic circuit and arranged in a state being inserted in the tilt coil. The objective lens and the second magnet are positioned separately in a direction orthogonal to both a focusing and tracking directions. The second magnet is polarized to an N pole and an S pole parallely in the tracking direction. Portions of the tilt coil opposed to each other in the tracking direction with the second magnet put therebetween are formed to be tilt drive portions moving the movable block in a tilt direction.
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