OPTICAL WRITING-READING HEAD FOR AN OPTICAL DISK AND AN OPTICAL DEVICE ASSOCIATED WITH SUCH A HEAD

AN OPTICAL WRITING-READING HEAD FOR AN OPTICAL DISK AND AN OPTICAL DEVICE ASSOCIATED WITH SUCH A HEAD The invention provides an optical head for writingreading a disk by means of at least a focussed radiation, this disk comprising at least one track, this track comprising evenly spaced apart grooves, this optical head using a motor comprising a fixed magnetic circuit having at least one air-gap in which a mobile assembly moves, this magnetic circuit comprising a magnetic access and radial tracking circuit having at least one core intersecting all the grooves. The mobile assembly is formed of two actuators, the first one providing access to and radial tracking of the track, the second providing focussing of the light radiation on this track, flexible fixing means connecting together these two actuators, guide means comprising friction sliding elements flexibly mounted on the radial and access actuator and allowing this actuator to slide over the core of the magnetic access and radial tracking circuit.