| 摘要 |
An objective lens drive includes a lens holder holding first and second objective lenses and moved at least in a focusing direction substantially parallel to optical axes of the objective lenses and in a tracking direction orthogonal to the focusing direction; a support supporting the lens holder movably at least in the focusing and tracking directions; a first adjusting unit provided between the first objective lens and the lens holder and adjusting a tilt of the first objective lens in a direction about an axis in a first direction being any direction in a plane orthogonal to the focusing direction; and a second adjusting unit provided between the second objective lens and the lens holder and adjusting a tilt of the second objective lens in a direction about an axis in a second direction being in a plane orthogonal to the focusing direction and substantially orthogonal to the first direction. |
