| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device which performs a reliable light receiving process, by emitting a plurality of laser lights on the same optical axis and by performing the wave front conversion of the optical axis deviation of the reflected wave in this case so that the adjustment error is corrected. <P>SOLUTION: The optical pickup device includes: a first irradiation part for emitting a first laser light; a second irradiation part for emitting a second laser light having the wavelength different from that of the first laser light on the same axis as the first laser light; an objective lens for concentrating the first and second laser lights emitted from the first and second irradiation parts and for emitting them to an information storage medium; a wave front conversion part disposed on the propagation paths of the respective reflected lights of the first and second laser lights from the information recording medium and for receiving the reflected lights of the first and second laser lights so as to perform the selective wave front conversion of at least one; and a light receiving part for receiving at least one of the reflected lights of the first and second laser lights transmitted through the wave front conversion part and for outputting a detection signal corresponding thereto. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
