| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical head and an optical disk drive which are hard to be affected adversely by deviation of a center position of a lens facing to a track when a plurality of lenses are held by one lens holder. <P>SOLUTION: The optical head constituted movably along the radial direction of the optical disk loaded at the prescribed position is provided with a first lens converging a first laser beam included in a first wavelength band for the optical disk, a second lens converging incident laser beam out of a second laser beam included in a second wavelength band being shorter than the first wavelength band for the optical disk and a third laser beam included in a third wavelength band being shorter than the second wavelength band, and a lens holding means arranging and holding the first and the second lenses along the track direction of the optical disk; the lens holding means holds the first lens on a movement axis along the prescribed radial direction. <P>COPYRIGHT: (C)2010,JPO&INPIT |
