Object lens driving device and optical head having the same
AssigneeKabushiki Kaisha Toshiba
InventorHiroshi Shinozuka
Life of this patent
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Abstract
An object lens driving device comprises a movable unit which supports an object lens and is movably supported by a fixed unit, a first mechanism which has a first magnet affixed to a fixed unit and a first coil affixed to a movable unit, and drives the movable unit in a predetermined direction by supplying electricity to the first coil, and a second mechanism which has a second coil affixed to a fixed unit and a second magnet affixed to a movable unit, and drives the movable unit in a direction different from that of the first mechanism by supplying electricity to the second coil, wherein the first and second magnets are arranged so that their polarities have the same orientation.
Claims15
An object lens driving device comprising:
- a fixed unit;
- a movable unit configured to hold an object lens and to be movably supported by the fixed unit;
- a first mechanism having a first magnet affixed to the fixed unit and a first coil affixed to the movable unit, and configured to drive the movable unit in a predetermined direction by supplying electricity to the first coil;
- and
- a second mechanism having a second coil affixed to the fixed unit and a second magnet affixed to the movable unit, and configured to drive the movable unit in a direction different from that of the first mechanism by supplying electricity to the second coil;
- wherein
- the first and second magnets are arranged so that their polarities have the same orientation.
An object lens driving device comprising:
- a fixed unit;
- a movable unit configured to hold an object lens and to be movably supported by the fixed unit;
- a first mechanism having a first magnet affixed to the movable unit and a first coil affixed to the fixed unit, and configured to drive the movable unit in the predetermined direction by supplying electricity to the first coil;
- and
- a second mechanism having a second coil affixed to the movable unit and a second magnet affixed to the fixed unit, and configured to drive the movable unit in a direction different from that of the first mechanism by supplying electricity to the second coil;
- wherein
- the first and second magnets are arranged so that their polarities have the same orientation.
An optical head comprising:
- a light source;
- an object lens configured to focus light from a light source onto a disk;
- a movable unit configured to hold the object lens and to be movably supported by a fixed unit;
- a first mechanism having a first magnet affixed to the fixed unit and a first coil affixed to the movable unit, and configured to drive the movable unit in a predetermined direction by supplying electricity to the first coil;
- and
- a second mechanism having a second coil affixed to the fixed unit and a second magnet affixed to the movable unit, and configured to drive the movable unit in a direction different from that of the first mechanism by supplying electricity to the second coil;
- wherein
- the first and second magnets are arranged so that their polarities have the same orientation.
Dependencies are inferred from the claim text.