Optical: systems and elements – Lens – With support
Patent
1993-07-12
1995-04-25
Psitos, Aristotelis
Optical: systems and elements
Lens
With support
369 4414, 369 4422, 359814, G11B 709
Patent
active
054104335
ABSTRACT:
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.
REFERENCES:
patent: 4443721 (1984-04-01), Jansen
patent: 4507765 (1985-03-01), Suzuki et al.
patent: 4554653 (1985-11-01), Malissin et al.
patent: 4845699 (1989-07-01), Kawasaki et al.
patent: 4942562 (1990-07-01), Suzuki
Bec Daniel
Le Merrer Jean-Pierre
Art Tech Gigadisc "ATG"
Huber P. W.
Plottel Roland
Psitos Aristotelis
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