Optical disk apparatus with shortened access time and rotated me

Details Optical disk apparatus with shortened access time and rotated me Optical disk apparatus with shortened access time and rotated me

1989-04-21

1992-02-11

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 54, 369 33, 360 7805, G11B 700

Patent

active

050880756

ABSTRACT:
An optical disk apparatus includes an optical head for converting light reflected from an optical disk into a photoelectric signal, a linear motor for moving the optical head along a radial line of the optical disk and a position determining circuit for determining the position of a track on the basis of track information contained in the photoelectric signal. The distance between the present track that the optical head faces and a target track to which the optical head is to be moved is updated by moved distance information of the optical head. Reference speed information is read out of a memory addressed by the distance information. The speed of the linear motor is speed controlled in accordance with the reference speed information so that the optical head is moved to the target track.

REFERENCES:
patent: 4481613 (1984-11-01), Yokota
patent: 4607358 (1986-08-01), Maeda et al.
patent: 4745587 (1988-05-01), Maeda et al.
patent: 4835752 (1989-05-01), Nakatsu et al.
patent: 4866687 (1989-09-01), Kasai et al.
patent: 4901299 (1990-02-01), Nakatsu
patent: 4918680 (1990-04-01), Miyasaka
Ogawa et al., High Speed Access Method of Optical Disk Memory, 1986, Optical Memory Symposium, Dec. 19, 1986.
U.S. Ser. No. 07/357,242 dated May 26, 1989, Yokota.
U.S. Ser. No. 07/343,306 dated Apr. 26, 1989, Yamamuro.

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