Abstract: In an opto-magnetic disk type writing/reading apparatus having a magnetic head held by a suspension load beam in an air-borne floating state over a surface of the opto-magnetic disk, the suspension load beam is raised up or put down in a manner that firstly the opto-magnetic disk is revolved at a higher revolution speed than the predetermined rated revolution speed for a predetermined short period, and thereafter the revolution speed is lowered to the predetermined revolution speed after soft-landing putting down of the magnetic head to achieve a steady-state air-borne floating position.

Abstract: An objective lens actuator is provided which is equipped with an actuating mechanism for actuating an objective lens mounted on a lens holder of an apparatus adapted to write or read information into or from a recording medium. The actuator moves the lens and its holder in two directions, one direction being substantially parallel to a surface of the recording medium such that the objective lens makes turning motion about a pivot axis oriented substantially normal to the surface of the recording medium and the other direction being vertical, with the lens and holder sliding vertically relative to the pivot axis. The actuator is equipped with at least one parallel driving coil for driving the movable section in the parallel direction and with at least one parallel driving magnetic circuit for imparting a magnetic flux to the parallel driving magnetic circuit.