| 摘要 |
<p>An optical head having a decreased size small enough to be accommodated in the opening of a disk cartridge and having an enhanced dynamic performance adapted to high density and high transfer rate. The optical head is of a two-axis actuator system in which an objective (102) is driven along the Z axis parallel to the focusing direction vertical to the optical disk and along the X axis parallel to the tracking direction which is a radial direction of the optical disk. The objective (102) is disposed at the center of a coil bobbin (101). A focusing coil (103) is provided around the Z-axis on the coil bobbin (101). Tracking coils (104a, 104b) are provided around the X-axis on the coil bobbin (101) at both ends of the coil bobbin (101) along the X-axis. Magnets (107a to 107d) are so arranged as to be symmetrical with respect to the Z-Y plane including the Z-axis parallel to the optical axis of the objective (102) and the Y-axis and with respect to the Z-X plane including the Z-axis and the X-axis.</p> |
