| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk unit in which reproduction, recording, and erasing for the different recording layers of an optical disk can easily be carried out from a film surface side by using a floating slider on which an object lens is mounted. SOLUTION: In the optical disk unit which makes incident light from the film surface side of the optical disk through the object lens mounted on the floating slider, and carries out at least either of the reproduction and the recording, a plurality of objective lens groups consisting of at least one piece are mounted on the floating slider to carry out at least either of the reproduction and the recording of the optical disk. |
