Optical disk having information pits of different lengths and sh

Details Optical disk having information pits of different lengths and sh Optical disk having information pits of different lengths and sh

1996-01-31

1998-02-10

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692751, G11B 724

Patent

active

057176825

ABSTRACT:
An optical disk includes: an information recording surface on which a laser light is irradiated; and information pits arranged on the information recording surface and including a plurality of shapes each corresponding to information to be recorded, each of the shapes having different lengths in at least one of a radial direction of the disk and a circumferential direction of the disk and a depth d substantially satisfying the following relationship with a wavelength .lambda. of the laser light:

REFERENCES:
patent: 5331623 (1994-07-01), Matoba et al.
patent: 5331626 (1994-07-01), Sugiura
patent: 5337301 (1994-08-01), Sugiura et al.
patent: 5339304 (1994-08-01), Hanaoka
patent: 5357499 (1994-10-01), Nomoto
patent: 5359591 (1994-10-01), Nomoto
patent: 5459712 (1995-10-01), Sugaya et al.
patent: 5467339 (1995-11-01), Nakajima et al.

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