| 摘要 |
An optical pickup actuator is provided to perform independent tilt servo driving in a simple structure by using a common magnet for focus servo and tilt servo driving and a separate tilt coil. An optical pickup actuator comprises a movable unit(20), a supporting unit, and a three-axis magnetic driving unit. The movable unit is loaded with an objective lens(10). The supporting unit supports the movable unit. The three-axis magnetic driving unit is installed at the movable unit and the supporting unit to move and tilt the movable unit in a focusing direction and a tracking direction. The three-axis magnetic driving unit includes a pair of focus/tilt driving magnets(41,42), a pair of tracking driving magnets(43,44), a pair of focus coils(51), a pair of tilt coils, and a pair of tracking coils(55,56). The focus/tilt and tracking driving magnets are installed on the supporting unit to cross mutually around the objective lens. The focus coils and the tilt coils are installed on the movable unit to correspond to the focus/tilt driving magnets. The tracking coils are installed on the movable unit to correspond to the tracking driving magnets.
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