| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an objective lens driving device of an optical disk drive provided with a plurality of kinds of objective lenses which can narrow the entire necessary driving range of the plurality of objective lenses, accordingly suppress misalignment between the optical axis of light and the optical axis of an objective lens and reduce the load of the objective lens driving device. <P>SOLUTION: An optical system is mounted on a movable platform that is moved in the tracking direction of optical disks 2A and 2B so that the position of the movable platform can be controlled, and at least one of recording and reproduction is carried out. The plurality of kinds of objective lenses 5a and 5b corresponding to a plurality of kinds of optical disks are arranged in the tracking direction and are fixed to a lens holder. The necessary driving range Z4 of the objective lens 5b is stored within the necessary driving range Z3 of the objective lens 5a, wherein the necessary driving range in a focus direction is maximum. <P>COPYRIGHT: (C)2004,JPO |
