| 摘要 |
PROBLEM TO BE SOLVED: To provide an objective lens driving device capable of satisfactorily securing the number of winding of a focusing coil even if it is a thin type and capable of obtaining high driving force in the focusing direction and the tracking direction. SOLUTION: The focusing coil 8 which is wound in the direction crossing the optical axis of an objective lens 1 is arranged in a coil bobbin 4 which is attached to a lens holder 5, and tracking coils 9, 10 which are wound in the direction parallel to the optical axis of the objective lens 1 are arranged in the inside of the winding wire of the focusing coil 8. Thus, the number of winding in the focusing direction of the focusing coil 8 is satisfactorily secured regardless of the length of the effective part of the tracking coils 9, 10, and whereby high driving force is obtained.
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