Abstract: An optical pickup actuator has an objective lens holder which holds an objective lens and on which at least tracking coils and a focusing coil are mounted and a damper base for swingably supporting the objective lens holder via six suspension wires. The damper base includes supporting portions for supporting ends of the six suspension wires using adhesive agent. At the supporting portions side, the optical pickup actuator has an ACT flexible printed wiring board which is electrically connected to the ends of the six suspension wires. A reinforcing plate having a thickness of 0.5 mm lies between the ACT flexible printed wiring board and the supporting portions to set a gap between the ACT flexible printed wiring board and the supporting portions.

Abstract: In order to fix a photodetector to an optical base with the photodetector held, a PD holder has a pair of engaging slots at which the PD holder is sandwiched between a pair of adjustment pints at both ends thereof and a pair of concave portions which are formed in a rear surface of the PD holder at both ends thereof and at which an adhesive is applied. The PD holder includes a substantially rectangular plate-shaped base extending in parallel with a plane defined by an X-axis direction and a Y-axis direction and a pair of protrusion portions extending forwards at both sides in the X-axis direction of the plate-shaped base. The pair of engaging slots are formed in the pair of protrusion portions and the pair of concave portions are formed in the rear surface of the pair of protrusion portions.