Optical pickup

An optical pickup comprising:

• a lens holder for holding an objective lens;
• and
• an actuator having:
• a focusing coil for urging the lens holder in a focusing direction in cooperation with magnets;
• and
• tracking coils for urging the lens holder in a tracking direction in cooperation with the magnets, wherein:
• the tracking coils are respectively disposed on both sides between which the focusing coil is disposed;
• a pair of through holes are respectively provided in the lens holder between a portion where the focusing coil is disposed and a portion where the tracking coil on one side is disposed and between the portion where the focusing coil is disposed and a portion where the tracking coil on the other side is disposed;
• each of a pair of plate piece-like magnets is disposed in a space where the focusing coil and the tracking coil are opposed to each other in each of the through holes, such that a magnetized surface on one surface side of each of the pair of plate piece-like magnets is opposed to the focusing coil and a magnetized surface on the other surface side thereof is opposed to the tracking coil;
• and
• the lens holder is positioned so as to be displaceable in the focusing direction and the tracking direction by a supporting shaft disposed in a central portion of the portion where the focusing coil is disposed.