Seek apparatus for optical disc drive

Details Seek apparatus for optical disc drive Seek apparatus for optical disc drive

1988-08-19

1991-10-08

Envail, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

360 7806, 360 7303, G11B 1700

Patent

active

050560727

ABSTRACT:
An optical disc drive that employs a velocity feedback loop for detecting the moving velocity of an optical pickup, thereby to enable the optical pickup to seek a target recording track of an optical disc. The number of tracks to the target recording track is calculated on the basis of a signal derived from the optical pickup and a target velocity signal is supplied to the velocity feedback loop in accordance with the calculated result, whereby the moving velocity of the optical pickup can be controlled to become [0] at a timing (time point) at which the optical pickup reaches the target recording track.

REFERENCES:
patent: 4333117 (1982-06-01), Johnson
patent: 4491776 (1985-01-01), Veale
patent: 4607358 (1986-08-01), Maeda et al.
patent: 4615023 (1986-09-01), Inada et al.
patent: 4638230 (1987-01-01), Lee
patent: 4710827 (1987-12-01), Okita
patent: 4808900 (1989-02-01), Ohlinger et al.
patent: 4809094 (1989-02-01), Akiyama
patent: 4827200 (1989-05-01), Ogura et al.
patent: 4899234 (1990-02-01), Genheimer
IEEE, "Magneto-Optical Mass Storage System with 130 mm Write-Once Disk Compatibility", 1987, pp. 92-97.

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