DRIVING DEVICE OF OPTICAL PICKUP

摘要

PURPOSE: A driving device of an optical pickup is provided to install a plurality of piezoactuators driving an objective lens in a tilting direction, so as to promptly cope with a rake angle between the objective lens and a disk and precisely and correctly perform recording and playing operations. CONSTITUTION: A pickup base(400) installs a reflective mirror(401) therein. A base plate(300) is installed in an upper part of the pickup base. An objective lens driving unit part(200) installed on an upper part of the base plate drives an objective lens(203) in focusing and tracking directions. A plurality of piezoactuators(500,600) are respectively composed of stack-type piezoactuators(1000) displaced by an electric potential difference to drive the objective lens driving unit part between the pickup base and the base plate in radial and tangential directions. And the plurality of piezoactuators form pivot joint parts(603) therein at areas in which the piezoactuators contact with the base plate.