Patent ID: 7562372

Claim:
An optical pickup for driving objective lenses in a focusing direction and in a radial direction, the pickup comprising: a base configured with an interior mounting space and a light-propagating cutout; a movable member movable relative to the base, the movable member including a center portion, a first side and a second side, the first side and the second side being apart from each other in the radial direction so as to flank the center portion; a plurality of objective lenses provided at the center portion of the movable member; a first coil block and a second coil block provided at the first side and the second side of the movable member, respectively; a first pair of magnets provided on the base and flanking the first coil block in a tangential direction perpendicular to both the focusing direction and the radial direction; a second pair of magnets provided on the base and flanking the second coil block in the tangential direction; a plurality of support members attached to the first side and the second side of the movable member in a manner such that the movable member is movable in the focusing direction and the radial direction; relative to the base; a holder configured with a light guiding opening and connected to the support members holding the movable member via the support members; a reflector provided in the interior mounting space of the base, facing the center portion of the movable member, and intervening between the first side and second side of the movable member; wherein each of the coil blocks includes a focusing coil and a tracking coil, the focusing coil having a coil axis extending in the focusing direction and being provided for driving the movable member in the focusing direction, the tracking coil having a coil axis extending in the tangential direction and being provided for driving the movable member in the radial direction, the tracking coil being provided on an outer side of the focusing coil, wherein the center portion of the movable member is thinner than the first side and the second side of the movable member, and wherein the light-guiding opening of the holder is aligned with the light-propagating cutout of the base to allow a light beam to pass through the light-guiding opening of the holder and the light-propagating cutout of the base onto the reflector.