| 摘要 |
An object lens driving apparatus ( 100 ) includes a lens holder ( 4 ) that holds an object lens ( 1 ) facing a recording medium and is so supported that the lens holder ( 4 ) is movable toward and away from the surface of the recording medium. A focusing coil ( 5 ) is fixed in the interior of the lens holder ( 4 ) so that the focusing coil ( 5 ) surrounds an optical axis of the object lens ( 1 ). By apply current to the focusing coil ( 5 ), a driving force is generated, which moves the lens holder ( 4 ) toward and away from the surface of the recording medium. By disposing the focusing coil ( 5 ) in the interior of the lens holder ( 4 ) so that the focusing coil ( 5 ) surrounds the optical axis of the object lens ( 1 ), a movable part of the object lens driving apparatus ( 100 ) can be reduced in size and weight, so that a high sensitivity can be accomplished.
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