Patent ID: 6710948
Filing Date: 2004-03-23
Classification: G02B

Abstract:
An optical pickup comprising:a housing having a through hole for a reference bolt, a recessed portion formed concentric with the through hole for a reference bolt and through holes for tilt adjusting bolts; a reference bolt to be inserted in the through hole for a reference bolt, the reference bolt having a head; two tilt adjusting bolts to be inserted in the through holes for tilt adjusting bolts; an actuator base attached to an end face of the housing by the reference bolt and the tilt adjusting bolts; a lens holder holding an objective lens, the lens holder is supported on the actuator base; and a tapered conical spring interposed between the recessed portion and the head of the reference bolt, the tapered conical spring having one end portion whose outside diameter is set to be identical to or slightly smaller than a diameter of a bottom surface of the recessed portion and another end portion whose outside diameter is set to be smaller than the outside diameter of the one end portion and identical to or slightly smaller than a diameter of the head of the reference bolt, wherein the one end portion of the tapered conical spring is made to abut against the bottom surface of the recessed portion instead of abutting against a washer, while the other end portion of the tapered conical spring is made to abut against the head of the reference bolt, thereby urging the actuator base toward the end face of the housing, and each of the tilt adjusting bolts are operated against a spring force of the tapered conical spring so as to align an optical axis of the objective lens with an optical axis of laser light.