Optical-disk recording and reproducing apparatus and method usin

Details Optical-disk recording and reproducing apparatus and method usin Optical-disk recording and reproducing apparatus and method usin

1996-11-26

1998-03-31

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 369 54, 369111, G11B 7095

Patent

active

057346330

ABSTRACT:
The optical-disk recording and reproducing apparatus is provided with an optical head, a reproduction circuit, a detector circuit, a servo circuit, a recording circuit, and a controller. The controller among them performs such control that information is recorded and reproduced on only either lands or grooves in a region where file management information is recorded and reproduced, while information is recorded and reproduced on both lands and grooves for a plurality of tracks or for every zone in a data region, in the case of a land and groove recording optical disk. In the case of a land or groove recording optical disk, the controller performs such control that information is recorded and reproduced at alternate tracks in a region where file management information is recorded and reproduced, while information is continuously recorded and reproduced in the data region. As an optical disk, the track pitch in the region where the file management information is recorded and reproduced is made wider than the diameter of the laser beam.

REFERENCES:
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patent: 5124962 (1992-06-01), Haneji
patent: 5448552 (1995-09-01), Onagi
patent: 5452272 (1995-09-01), Murakami et al.
patent: 5477526 (1995-12-01), Inoue
Miyagawa et al., "Improvement of track density by land and groove recording on phase change optical disk", Extended Abstracts (The 40th Spring Meeting, 1993); The Japan Society of Applied Physics and Related Societies, May 1993.
Ohno et al., "Investigation of Land & Groove Recording Method on Phase Change Optical Disks", Extended Abstracts (The 40th Spring Meeting, 1993); The Japan Society of Applied Physics and Related Societies, May 1993.
Ogami et al., "Optical Disk Technique", Recording Fromat, pp. 222-223.

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