Optical recording/reproducing device

Abstract

An optical pickup is provided below an optical disk. A laser beam is emitted from a semiconductor laser onto a track, through an objective lens. The objective lens is capable of shifting, and is shifted in the direction of the track width by a magnetic force from a tracking actuator, thereby performing lens tracking. The optical pickup is mounted on a carriage. The carriage is shifted along the radial direction of the optical disk by a voice coil motor. This shifts the laser beam along the radial direction of the optical disk, thereby performing track access. Upon reception of an access command, a velocity control mode commences, and the shift velocity of the carriage is controlled in accordance with a velocity control signal corresponding to the distance between a target track and a current track. When the pickup arrives near the target track, the generation of velocity control signal ceases and the location control mode commences. When the carriage is deviated from the target track, its servo is adjusted in accordance with its deviation, by a location control signal. During velocity control of the carriage, a lens damping signal corresponding to the velocity control signal is supplied to the objective lens. After location control of the carriage commences, the lens damping signal corresponding to a location cotnrol signal is supplied to the objective lens until the velocity of the carriage falls below a predetermined value.