| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device and an optical disk device, which execute sure operations with respect to several types of optical disks with simple configurations. <P>SOLUTION: In a diffraction grating 14 for generating a diffracted light from an optical beam reflected on an optical recording medium, a grating pattern of the diffraction grating 14 is selected so as to generate ± secondary diffracted lights for the optical beam of a first wavelength, and ± primary diffracted lights for the optical beam of a second wavelength roughly double of the first wavelength. <P>COPYRIGHT: (C)2007,JPO&INPIT |
