Recording and/or reproducing apparatus with an optical pickup actuator having high thrust

An optical pickup actuator comprising:

• a lens holder to hold an objective lens, movably supported by a supporting unit;
• and
• a magnetic driving unit to drive the lens holder in a focusing direction, a tracking direction, and/or a tilting direction,
• wherein the magnetic driving unit comprises:
• a surface-triple pole magnet comprising a plurality of differently magnetized areas, formed by facing sides of two magnets among three magnets;
• and
• a coil portion comprising tracking coils and tilt coils disposed to interact with the differently magnetized areas of the surface-triple pole magnet and a focusing coil disposed to interact only with a non-differently magnetized area of the surface-triple pole magnet.

An optical recording/reproducing apparatus comprising:

• an optical pickup comprising an objective lens to focus light emitted from a light source onto a medium and an optical pickup actuator to drive the objective lens, with the optical pickup being movable in a radial direction of the medium to record and/or reproduce information to/from the medium;
• and
• a control unit to control servo of the optical pickup,
• wherein the optical pickup actuator comprises:
• a base;
• a lens holder to hold the objective lens;
• a supporting unit, having one end coupled to the lens holder and another end coupled to a holder installed on the base, so that the lens holder is moveable over the base;
• and
• a magnetic driving unit to drive the lens holder in a focusing direction, a tracking direction, and/or a tilting direction,
• wherein the magnetic driving unit comprises:
• a surface-triple pole magnet comprising a plurality of differently magnetized areas, formed by facing similarly magnetized sides of each of two respective first and second magnets with a respective differently magnetized side of a third magnet;
• and
• a coil portion comprising tracking coils and tilt coils disposed to interact with the differently magnetized areas of the surface-triple pole magnet portion and a focusing coil disposed to interact with a non-differently magnetized area of the surface-triple pole magnet.

An optical recording/reproducing apparatus comprising:

• an optical pickup comprising an objective lens to focus light emitted from a light source onto a medium and an optical pickup actuator to drive the objective lens, with the optical pickup being movable in a radial direction of the medium to record and/or reproduce information to/from the medium;
• and
• a control unit to control servo of the optical pickup,
• wherein the optical pickup actuator comprises:
• a base;
• a lens holder to hold the objective lens;
• a supporting unit, having one end coupled to the lens holder and another end coupled to a holder installed on the base, so that the lens holder is moveable over the base;
• and
• a magnetic driving unit to drive the lens holder in a focusing direction, a tracking direction, and/or a tilting direction,
• wherein the magnetic driving unit comprises:
• a surface-triple pole magnet comprising a plurality of differently magnetized areas, formed by facing sides of two magnets among three magnets;
• and
• a coil portion comprising tracking coils and tilt coils disposed to interact with the differently magnetized areas of the surface-triple pole magnet and a focusing coil disposed to interact only with a non-differently magnetized area of the surface-triple pole magnet.