| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compound objective lens forming mold for forming an optical surface with high accuracy at a relatively low cost and whose production process is simple. <P>SOLUTION: A fixed mold 61 is provided with two second core molds 61c and 61d having optical transfer surfaces OS1 and OS2 on which respective optical surfaces OS1' and OS2' corresponding to one side (concretely, optical information recording medium side) between first and second objective lens parts 91a and 91b constituting a compound objective lens 91 are formed, respectively, the respective optical surfaces OS1' and OS2' at the optical information recording medium side of the respective objective lens parts 91a and 91b can be formed by the core molds 61c and 61d. Consequently, the arrangement, shapes, or the like as well as the rotation positions of the respective optical surfaces OS1' and OS2' at the optical information recording medium side of the respective objective lens parts 91a and 91b can be individually adjusted so that the compound objective lens 91 composed of the plurality of objective lens part 91a and 91b with high surface accuracy can be formed at a relatively low cost and with high reproducibility. <P>COPYRIGHT: (C)2009,JPO&INPIT |
