Acces and follower control device for optical disk

Details Acces and follower control device for optical disk Acces and follower control device for optical disk

G - Physics

11

B

352/32.3

G11B 7/095 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01) G11B 7/12 (2006.01)

Patent

CA 2019630

17 ABSTRACT OF THE DISCLOSURE Disclosed is a device for access to and follower control of a track of an optical disk. This device has an optical head with an axis orthogonal to the plane of the disk, at least one fixed magnetic circuit comprising a core that is secant with all the turns of the track, the gap of which forms a plane that is substantially perpendicular to the support, a first motor device allowing for the access to and radial tracking of the track formed by at least one first coil mounted so that it moves on the core of the magnetic circuit and a second motor device that enables the focusing of the radiation on the track consisting of a second coil cooperating with a magnetic circuit. The optical head, the coil of the first motor device and the coil of the second motor device are rigidly fixed to one another so as to form a single compact moving element that moves in the gaps of the magnetic circuits. The disclosed device can be applied to digital optical disks.

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