| 摘要 |
<P>PROBLEM TO BE SOLVED: To correct coma aberration to the extent that performance acceptable as an optical pickup device is retained with a simple method, in the optical pickup device in which a first objective lens and a second objective lens are fixed to the same lens holder. <P>SOLUTION: The optical pickup device has: the first objective lens which condenses a first laser beam to a signal recording layer provided to an optical disk, and is fixed on a lens holder held with a holding wire so as to be displaced in the direction of a signal surface of the optical disk and in the radial direction thereof; and a second objective lens which condenses a second laser beam to the signal recording layer provided to the optical disk, and is fixed on the lens holder, incorporated therein. The first objective lens and the second objective lens are fixed while aligning their directions by inclining seating faces of the first objective lens and the second objective lens with respectively predetermined angles, and roughly classifying a coma aberration producing direction of the first objective lens and that of the second objective lens with the simple method. <P>COPYRIGHT: (C)2011,JPO&INPIT |
