An optical pickup is provided for driving objective lenses in focusing and
radial directions. The pickup includes a movable member, and objective
lenses at the center portion of the movable member. The pickup also
includes coil blocks provided at two side portions of the movable member,
and pairs of magnets flanking the coil blocks in a tangential direction
perpendicular to the focusing and radial directions. Support members are
attached to the side portions of the movable member, permitting the
movable member to move in the focusing direction and the radial
direction. Each coil block includes focusing and tracking coils for
driving the movable member in the focusing direction and the radial
direction. The center portion of the movable member, below which a
reflector is arranged, is thinner than the side portions of the movable
member.