| 摘要 |
An optical pickup device according to an aspect of the present invention includes a rotary mechanism which rotates a half-wave plate in mechanical conjunction with drive of first and second collimator lenses. The rotary mechanism locates the half-wave plate at a first rotational position when the first collimator lens is located at a control operation position, and the rotary mechanism locates the half-wave plate at a second rotational position when the second collimator lens is located at the control operation position. When the rotational position of the half-wave plate is switched between the first rotational position and the second rotational position, a polarization direction of a laser beam is changed with respect to the polarization beam splitter to switch an optical path of the laser beam.
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