Optical disk and apparatus for reproducing the same

Details Optical disk and apparatus for reproducing the same Optical disk and apparatus for reproducing the same

1995-02-27

1997-04-15

Nelms, David C.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, 369110, G11B 724

Patent

active

056217196

ABSTRACT:
An optical disk includes: an information recording surface; first surface-transformed portion array formed on the information recording surface and including first surface-transformed portions transformed in shapes, the first surface-transformed portion reflecting a laser light, when it is irradiated thereon, polarized in accordance with the transformed shape thereof so that major axis of the polarized light is oriented to a first direction; and second surface-transformed portion array formed on the information recording surface and including second surface-transformed portions transformed in shapes, the second surface-transformed portion reflecting a laser light, when it is irradiated thereon, polarized in accordance with the transformed shape thereof so that major axis of the polarized light is oriented to a second direction. The first surface-transformed portion array and the second surface-transformed portion array are formed alternately in a radial direction of the optical disk, and the first direction and the second direction differ from each other by 45 degrees.

REFERENCES:
patent: 5331623 (1994-07-01), Matoba et al.
patent: 5493552 (1996-02-01), Kobori
patent: 5495460 (1996-02-01), Haraguchi et al.

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