OPTICAL UNIT ACTUATOR FOR INFORMATION RECORDING/REPRODUCING APPARATUS

摘要

An optical unit actuator for an optical information recording/reproducing apparatus includes an electromagnetic drive mechanism composed of a coil and a magnet cooperative to drive an objective lens mounted on an optical unit. One of the coil and the magnet is secured to the optical unit. The other of the coil and the magnet is held on a fixed unit with an elastic support member disposed therebetween, the fixed unit being immovable as against the movable optical unit. The elastic support member substantially dampens or takes up vibration caused by a reaction force caused as a result of acceleration of the objective lens when the objective lens is driven to follow a dynamic radial runout and an axial deflection of an optical disk. With the elastic support member thus provided, an optical component, a photoelectric transducer or the optical disk which is disposed on the side of the fixed unit is isolated from vibration. The control characteristics of a system including an optical head, the optical disk and a control circuit for the optical head can, therefore, be improved.