| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an objective lens driving device to be incorporated in an optical pickup device. <P>SOLUTION: Third and fourth focus coils 9c and 9d which are wound in hollow shapes so as to have winding axes in directions of optical axes of the objective lenses and are paired with first and second focus coils 9a and 9b juxtaposed in a tracking direction are provided on side faces of a lens holder 5 on both sides of objective lenses. Besides, first, second, third, and fourth magnets 11, 12, 13, and 14 disposed on the middle positions of the first, second, third, and fourth focus coils, a fifth magnet 16 disposed on the outside of the first and second focus coils in order to generate a magnetic flux acting on the first and second focus coils and a sixth magnet 17 disposed outside of the third and fourth focus coils in order to generate a magnetic flux acting on the third and fourth focus coils are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT |
