Multi-layer optical disk

Details Multi-layer optical disk Multi-layer optical disk

1996-08-27

1998-06-02

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 94, G11B 724

Patent

active

057611874

ABSTRACT:
The present invention provides a multi-layer optical disk, in which even if a wave length of read light is changed at a time of reproducing, both of reproduction signals from a first information memory layer and a second information memory layer have sufficient levels.
In a multi-layer optical disk, in which a first information memory layer and a second information memory layer are sequentially film-formed on a substrate and information recorded on the first information memory layer and the second information memory layer are reproduced by irradiating read light from a substrate side,

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Patent Abstracts of Japan, vol. 018, No. 278 (P-1743), May 26, 1994 & JP-A-06 044611 (Nippon Columbia Co., Ltd.), Feb. 18, 1994.

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