Information recorder with tracking and seeking operations using

Details Information recorder with tracking and seeking operations using Information recorder with tracking and seeking operations using

1994-02-14

1996-01-23

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 32, 369 4434, 369 4429, G11B 7085

Patent

active

054870550

ABSTRACT:
In an information recorder, a low frequency region component of a tracking error signal is extracted by a digital filter in a track following mode. In a seek mode, an actuator for an objective lens is driven in accordance with a signal obtained by adding a value indicative of this low frequency region component to a speed error between moving and target speeds of a light spot. Driving force for canceling a displacement of the light spot caused by inclination and vibration of the information recorder is added to seek driving force for performing a seeking operation so that influences of the inclination and vibration of the information recorder can be compensated. Thus, the seeking operation can be performed stably and accurately in spite of the inclination and vibration of the information recorder and eccentricity of a disk.

REFERENCES:
patent: 5109366 (1992-04-01), Moriya et al.
patent: 5163033 (1992-11-01), Yanagi
patent: 5241522 (1993-08-01), Yanagi
patent: 5351222 (1994-09-01), Ikeda et al.

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