| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a decreased size small enough to be accommodated in the opening of a disk cartridge and also an enhanced dynamic performance adaptable to high density and high transfer rate. <P>SOLUTION: The optical head is of a two-axis actuator system in which an objective lens 102 is driven along the Z-axis parallel to the focusing direction vertical to the optical disk surface and along the X-axis parallel to the tracking direction which is a radial direction of the optical disk. The objective lens 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-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 lens 102 and the Y-axis and with respect to the Z-X plane including the Z-axis and the X-axis. <P>COPYRIGHT: (C)2004,JPO |
