| 摘要 |
An optical head enabling a size reduction so that the optical head can be stored in an opening of a cartridge for a disk and enabling an improvement in the dynamic performance as the density and transfer rate are increased is provided. In a two-axis actuator optical head capable of driving an objective lens ( 102 ) along the Z axis in the focus direction, that is, vertical to the surface of the optical disk and along the X axis in the tracking direction, that is, the radial direction of the optical disk. The objective lens ( 102 ) is disposed in the center of the coil bobbin ( 101 ), a focusing coil ( 103 ) is disposed around the coil bobbin ( 101 ) and is wound around the X axis, and tracking coils ( 104 a and 104 b) are disposed on both ends of the coil bobbin ( 101 ) in the X axis direction and are wound around the X axis. Pairs of magnets ( 107 a to 107 d) are disposed plane-symmetrically with the Z-Y plane including the Z axis aligned with the optical axis of the objective lens ( 102 ) and the Y axis and with the Z-X plane including the Z axis and the X axis.
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