Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1997-03-17
1998-12-01
Dinh, Tan
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369277, 369 58, G11B 724
Patent
active
058448837
ABSTRACT:
A recording medium such as an optical disk with address information retained relative to tracks where data are recorded and/or reproduced. In this disk, lands and grooves are arranged alternately, and either the lands or the grooves constitute tracks. The grooves wobbled on the basis of address information and the non-wobbled DC grooves are arranged alternately while the lands are interposed therebetween. There is also provided an optical disk apparatus which comprises an irradiator for irradiating a first light beam spot to a target track on the optical disk, and further irradiating second and third light beam spots to the diametrical two sides of the center light beam spot; a light beam receiver for receiving the reflections of the first, second and third light beam spots from the optical disk, to thereby obtain first, second and third signals; and a calculator for calculating an address signal on the basis of the second and third signals.
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Hattori Masato
Kanno Masayoshi
Dinh Tan
Sony Corporation
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