Track jump device and information recording medium driving appar

Details Track jump device and information recording medium driving appar Track jump device and information recording medium driving appar

1997-04-15

1998-01-27

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

G11B 700

Patent

active

057128359

ABSTRACT:
An optical disk driving apparatus projects an optical beam onto a certain track on an optical disk and forms a light spot thereon. In an access operation onto an adjacent track, the light spot makes a 3-track jump from the position P1 onto the position P2, then a 2-track jump in the opposite direction onto the position P3. With such an arrangement, since the light spot moves by at least 2 tracks even in an access operation onto an adjacent track, it is possible to detect a zero crossing in a tracking error signal. Therefore, it is enabled to steadily adjust the speed of the movement of an objective lens based on the zero crossing. In consequence, a stable access to an information recording medium can be realized with an inexpensive arrangement.

REFERENCES:
patent: 4716557 (1987-12-01), Otani
patent: 4939712 (1990-07-01), Abe et al.
patent: 5090002 (1992-02-01), Chow et al.
patent: 5184338 (1993-02-01), Shimoda et al.

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