Tracking-deviation detector apparatus capable of preventing over

Details Tracking-deviation detector apparatus capable of preventing over Tracking-deviation detector apparatus capable of preventing over

1988-09-20

1990-09-11

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, 369 58, 369116, G11B 700

Patent

active

049568329

ABSTRACT:
An optical apparatus includes an objective lens for directing a light beam on a disk medium to record data. The light beam from the disk medium is detected so as to generate a track-error signal. This track-error signal represents a location of the light beam with respect to a track of the disk medium. The optical apparatus further includes a flip-flop circuit for detecting a level of the amplitude of the track-error signal. Data recording is prohibited by an AND gate when the amplitude of the track-error signal exceeds the level.

REFERENCES:
patent: 4554652 (1985-11-01), Maeda et al.
patent: 4669072 (1987-05-01), Miura et al.
patent: 4800548 (1989-01-01), Koishi et al.

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