Patent ID: 6894850

Claim:
An objective lens driving apparatus comprising: a lens holder as a movable part, which holds an objective lens; a stationary part that supports said lens holder in such a manner that said lens holder is movable in the direction of an optical axis of said objective lens and rotatable about a rotation axis parallel to said optical axis; a magnet mounted to one of said lens holder and said stationary parts said magnet being polarized in the direction toward or away from said rotation axis; a tracking coil and a focusing coil mounted to the other of said lens holder and said stationary part, said tracking coil having a side substantially parallel to said optical axis, and said focusing coil having a side substantially perpendicular to said optical axis and to said direction of polarization of said magnet; a magnetic path forming member that forms a magnetic path in which a magnetic field caused by said magnet passes through said side of said focusing coil and said side of said tracking coil; a current supplying member that supplies current to said focusing coil and said tracking coil; and an urging member causing a magnetic force in combination with said magnet, for urging said lens holder toward a reference position in the direction of said optical axis and in the direction of the rotation of said lens holder, wherein said tracking coil and at least a portion of said focusing coil are located on a part opposite to said objective lens with respect to said rotation axis of said lens holder.