| 摘要 |
An optical pickup unit for an optical disk drive, comprises a lens holder (27) including a lens having an optical axis, suspension wire members (33-36) suspend the lens holder (27) in a support frame in a cantilever fashion. The wire members constrain movement of the lens holder relative to the support frame, but allowing at least a translation in a focussing or axial direction (z), parallel to the optical axis of a lens in the lens holder (27). The wire members are fixed to the lens holder in positions at a distance from each other at least in focussing and tracking directions (z, x). The wire members are bent around an axis parallel to the radial direction (x) so as to allow an at least limited rotation about an axis in a tracking or radial direction (x) as well. In this way, an active alpha tilt correction is made possible with simple means.
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