Patent ID: 7522357

Claim:
A tilt adjustment device for objective lenses which are to be provided in an optical pickup device for converging a laser beam emitted from a laser element, irradiating an information recording medium with the converged beam, receiving a reflected light from the information recording medium, and reproducing and/or recording information, the optical pickup device being provided with an actuator comprising a plurality of the objective lenses for converging the laser beam, and a holder for fixedly holding the objective lenses which are tilt-adjusted with respect to the holder, wherein the tilt adjustment device comprises: a holder supporting table for supporting the holder which fixedly holds one objective lens; at least three pins for supporting an inferior surface of an edge of each of other objective lenses by each tip of the pins; a pin fixedly supporting member for fixedly supporting the ends of the pins; tilt adjusting means of the pin fixedly supporting member, which tilts to adjust tilt of each of the other objective lenses around a principal point center with respect to an inferior surface of an edge of the one objective lens; and a press member for pressing a superior surface of each of the other objective lenses, which can be removed after fixing the other objective lenses to the holder.