| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device in which first and second laser elements emit different wavelengths and their optical path lengths are mutually different. <P>SOLUTION: A 1st laser element 1 and a 2nd laser element 2 are arranged at different optical paths by a prism, and in front of the first laser element 1, a coupling lens 4 is arranged between the first laser element 1 and the prism in order to adjust the capturing angle of the laser beam emitted from the first laser element 1 and also the prism is set so that the distance to the joint surface 5a of the prism from the 2nd element 2 along the optical axis is longer than that from the 1st element 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
