| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate design of an optical pickup and to improve movement efficiency. <P>SOLUTION: This apparatus is provided with a fixed block 10 fixed to a movement base 7, and a movable block 11 moved in the directions of focusing and tracking for the fixed block, while holding a first objective lens 16 and a second objective lens 17 arranged being separated in the almost tangential direction for a recording track, when a lens center S2 of the second objective lens is positioned at a segment of a line Lr passing through a center of a disk type recording medium 100 and extended to a radial direction and the lens center of the second objective lens is positioned corresponding to a recording track Ti existing in the most inner periphery, a lens center S1 of the first objective lens is positioned corresponding to a more outside than a recording track existing at the most inner periphery or the recording track, when the lens center of the second objective lens is positioned corresponding to a recording track To existing at the most outer periphery, the lens center of the first objective lens is positioned corresponding to a more inside than the recording track existing at the most outer periphery or the recording track. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
