| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an objective lens driving device, by which the driving force sufficient for driving a lens holder is obtained without increasing the mass and magnetic force of a magnet piece held with the lens holder. <P>SOLUTION: The objective lens driving device 30 includes the lens holder 31 arranged around an axial line L36 parallel to an optical axis of the objective lenses 38, 39 so as freely to make the angular displacement also along the above axial line L36 so as freely to make the slide displacement while holding the objective lenses 38, 39 and a magnet 40, and coil bodies 32, 33 which are arranged oppositely facing to the magnet 40 and formed to such a shape that the coil is wound round a core member 43 consisting of a ferromagnetic material in the uniform winding direction facing from one end part 43a to another end part 43b and the both end parts 43a, 43b of the core member 43 are extended toward a 1st magnetic pole surface 41 of the magnet 40. <P>COPYRIGHT: (C)2003,JPO |
