| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device that performs reading operation of signals recorded in optical disks of different standards by three laser beams of different wavelengths. <P>SOLUTION: An optical pickup device is provided with a half mirror 17 for performing optical path synthesis of first, second and third laser beams and an aberration correction plate 16 and also provided with, between the aberration correction plate 16 and a two-wavelength laser diode 3, a divergent lens 18 with the aberration correction function of correcting aberration generated in the half mirror 17. <P>COPYRIGHT: (C)2012,JPO&INPIT |
