Optical pickup actuator and optical recording/reproducing apparatus

An optical pickup actuator comprising:

• a bobbin configured to accommodate a plurality of objective lenses for at least one of recording information into optical information record media which are different from each other in record density and reproducing information from the optical information record media;
• a support member for movably supporting the bobbin;
• and
• a magnetic circuit for driving the bobbin independently in a focus direction and in a tilt direction.

An optical recording/reproducing apparatus comprising:

• an optical pickup comprising an actuator for driving an objective lens and installed to be movable in the radial direction of an optical information storage medium for at least one of recording information into the optical information storage medium and reproducing information from the optical information storage medium;
• and
• a controller for controlling focusing, track and tilt servos;
• wherein the actuator comprises:
• a bobbin comprising at least one objective lens mounted thereon for allowing light to be incident onto the optical information storage medium, the bobbin being movably supported by a support member;
• and
• a magnetic circuit for driving the bobbin independently in focusing and tilt directions.