Optical storage apparatus having track seek control unit providi

Details Optical storage apparatus having track seek control unit providi Optical storage apparatus having track seek control unit providi

1996-11-14

1999-08-03

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, G11B 709

Patent

active

059333979

ABSTRACT:
When an access of a 1-track seek is instructed from an upper apparatus, a 1-track seek period is divided into a predetermined accelerating period and decelerating period. A decelerating current is determined in accordance with a difference between sample points before and after a zero-cross point of a tracking error signal E2, namely, a beam velocity with respect to the decelerating period and is supplied. With regard to a fine seek as well, the decelerating current is determined from the beam velocity obtained from the difference between the sample points before and after the zero-cross point just before a target track and is supplied.

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