Abstract: An objective lens drive apparatus includes an objective lens holder supporting an objective lens and provided with drive coils, a base fixing permanent magnets, printed circuit boards fixing the base at a monolithic portion thereof, and a plural number of flexible support members electrically and mechanically connected at their base ends to the printed circuit board, and with their distal ends supporting the objective lens holder so as to be flexibly displaced to a position where the drive coils oppose the permanent magnets, and wherein terminals of the drive coils are electrically connected to the flexible support members which are different with each other, and a drive current is supplied to the drive coils from the printed circuit board to pass through the flexible support members.

Abstract: A magneto-optical recording system comprises a first optical system carried by a first focusing actuator disposed at a first side of a magneto-optical recording medium and second optical system carried by a second focusing actuator disposed at a second side of the magneto-optical recording medium. When recording an information signal on the first side of the magneto-optical recording medium by means of an optical beam focused by the first optical system, the second focusing actuator is supplied with a biasing current and produces a magnetic field for recording. When recording an information signal on the second side of the magneto-optical recording medium, the first focusing actuator is supplied with a biasing current and produces a second magnetic field for recording.

Abstract: An optical assembly of an optical recording/reproducing apparatus for focusing an optical beam produced by a light source on a recording medium and for directing the optical beam reflected back from the recording medium to detectors comprises a first optical system including a first objective lens for focusing an optical beam on a first recording surface at a first side of a recording medium, a second optical system including a second objective lens for focusing the optical beam on a second recording surface at a second side of the recording medium, and an optical path switching means switched between a first and second states for selectively establishing an optical path connecting an optical processing unit including the light source and detectors to either one of the first and second optical subsystems.