| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid immersion lens which is easy to hold a lens and assemble and excellent in workability, to provide the solid immersion lens and condenser lens suitable for near field optical recording and reproduction, and to provide an optical pickup and an optical recording and reproducing device dealing with high recording density and a large capacity by using this. <P>SOLUTION: A holding part 2 having a straight line in the shape of a cross section along an optical axis is provided in at least a part of the ineffective area of incident light. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
