Optical disk having virtually constant width recording track and

Details Optical disk having virtually constant width recording track and Optical disk having virtually constant width recording track and

1998-01-28

2000-09-19

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

3692754, 369 47, G11B 709

Patent

active

06122233&

ABSTRACT:
In an optical disk, grooves and lands serving as recording tracks are provided, the grooves are shaped so as to have virtually the same width, and in a first region, the two side walls of each groove wind in accordance with address information. The first region of the groove is formed with its leading portion located at the same angular position as the leading portion of at least one of the first regions of the adjacent grooves. Moreover, the winding portions corresponding to respective bits of the address information are formed in a manner so as to synchronize to the adjacent grooves. With this arrangement, it becomes possible to easily detect address information from the grooves and lands, and consequently to obtain an information reproducing signal with high quality.

REFERENCES:
patent: 5339301 (1994-08-01), Raaymakers et al.
patent: 5616390 (1997-04-01), Miyagawa et al.
patent: 5848050 (1998-12-01), Nagasawa et al.
patent: 5933411 (1999-08-01), Inui et al.

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