| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk which is advantageous to miniaturize. <P>SOLUTION: A main guide shaft 58A guides a moving base 56 in the radial direction of the optical disk 2 in a movable fashion. A supporter 62 for the guide shaft supports the main guide shaft 58A to be revolvable but not movable in the axial direction. A drive 64 for rotating the guide shaft is set in a housing 54 to rotate the main guide shaft 58A. A cam 66 is made revolvable integrally with the main guide shaft 58A, combined movably in the axial direction of the main guide shaft 58A, and further combined movably in the axial direction integrally with the moving base 56. A moving mechanism 70 includes a cam follower 68 for engaging with the cam 66, transfers the motion of the cam follower 68 due to the rotation of the cam 66 to a spherical aberration correction lens 46, and moves the spherical aberration correction lens 46 along a light path L. <P>COPYRIGHT: (C)2010,JPO&INPIT |
