Defect detecting circuit and reproducing apparatus having the de

Details Defect detecting circuit and reproducing apparatus having the de Defect detecting circuit and reproducing apparatus having the de

1997-04-16

1998-10-06

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, 369 58, G11B 709

Patent

active

058188045

ABSTRACT:
A defect detecting apparatus and a reproducing apparatus therewith are disclosed, the defect detecting apparatus includes a detector for detecting a first type of defect such as a black dot that takes place in a fabrication stage and a second type of defect such as fingerprints that adheres on an optical disc and a controller for controlling various servo signals corresponding to the detected result.

REFERENCES:
patent: 4817077 (1989-03-01), Ono
patent: 5027339 (1991-06-01), Yoda et al.
patent: 5357497 (1994-10-01), Ogawa
patent: 5497361 (1996-03-01), Mita et al.

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