Beam access apparatus for optical disc system

Details Beam access apparatus for optical disc system Beam access apparatus for optical disc system

1985-08-12

1986-09-30

Faber, Alan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 43, 369 44, 369 33, 250202, 358907, G11B 2110

Patent

active

046150234

ABSTRACT:
A beam access apparatus for an optical disc system. The apparatus includes a lens position detector for generating a lens position signal indicating a position of the objective lens in a radial direction of the disc with respect to the optical head which is movable relative to the disc. The apparatus is operated in a head access mode in which the optical head is moved in the radial direction of the disc and the objective lens is caused to follow the movement of the optical head such that the objective lens is positioned at a predetermined location with respect to the optical head. The apparatus is also operable in a lens access mode wherein the objective lens is moved in the radial direction and the optical head is caused to follow the objective lens such that the objective lens is located at a predetermined position with respect to the optical head.

REFERENCES:
patent: 4135083 (1979-01-01), Van Alem
patent: 4236232 (1980-11-01), Jansen
patent: 4363116 (1982-12-01), Kleuters
patent: 4562562 (1985-12-01), Noviga

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