Access and tracking apparatus for optical disc

Abstract

Abstract The present invention relates to a device for accessing and tracking a track of an optical disc. This device comprises an optical head (3) with optical axis (B) orthogonal to the plane of the disc, at least one fixed magnetic circuit comprising at least one core (6) secant to all the turns of the track and whose airgap forms a plane substantially perpendicular to the medium, a first motor device allowing access and radial tracking consisting of at least one first coil (4) mounted so as to move over the core of the magnetic circuit, and a second motor device allowing the focusing of the radiation onto the track, consisting of a second coil (5) cooperating with a magnetic circuit. The optical head (3), the coil (4) of the first motor device and the coil (5) of the second motor device are fixed rigidly one with another so as to form a single compact movable rig moving within the airgaps of the magnetic circuits. Application to digital optical discs. <IMAGE>

Inventors

• 👤 Daniel Bec
• 👤 Jean-Pierre Le Merer

Bibliographic Details