| 摘要 |
An optical pickup for controlling an objective lens (7) supported at a lens holder (2), the control being made in a focusing direction in parallel with an optical axis direction, in a tracking direction orthogonal to the focusing direction, and for a tilt angle for tilting the optical axis of the objective lens by following the tilt of an optical disk. A pair of focusing coils (20) and a pair of tracking coils (30) are arranged on the lens holder. The pair of focusing coils (20) each has a coil surface that is orthogonal to the winding axis of a focusing coil section constructing each focusing coil and faces a magnet. Further, the pair of focusing coils (20) is installed with coil surfaces facing a tangential direction, and they are at positions that are opposite to each other in the tangential direction across the objective lens, displaced from each other in the tracking direction, and displaced to the left and right from an imaginary line, as the center, which is perpendicular to the tracking direction and passes the optical axis of the objective lens. The tilt angle of the objective lens is controlled by varying a drive force produced at the pair of the focusing coil sections. ® KIPO & WIPO 2007
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