| 摘要 |
An optical pickup includes a light source, an objective lens for condensing a light beam emitted from the light source on a disk, a hologram element for splitting the light beam reflected by the disk, a photo detector for receiving the split light beam, a holding element for holding the objective lens and the hologram element, and an actuator for driving the holding element, the objective lens and the hologram element as one unit to shift in a tracking direction.
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