Optical recording medium having a specified range of pit widths

Details Optical recording medium having a specified range of pit widths Optical recording medium having a specified range of pit widths

1997-03-06

1998-10-13

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692751, G11B 724

Patent

active

058222944

ABSTRACT:
An optical recording medium capable of being reproduced by a conventional drive device which meets an optical disk having grooves and no groove in an area in which pits are formed. In the optical recording medium having pits 1 showing information signals in the shape of protruding and recessed parts, it is assumed that the depth t1 of the above mentioned pits t2 of the pits 1 is located within a range of 0.3 to 0.6 .mu.m. Herein, n designates the refractive index of the base of the optical recording medium and designates the wavelength of the light used for reproduction.

REFERENCES:
patent: 5477527 (1995-12-01), Tsuchiya et al.
patent: 5517486 (1996-05-01), Haneda
patent: 5602825 (1997-02-01), Sugaya et al.
patent: 5617406 (1997-04-01), Onagi et al.
patent: 5666345 (1997-09-01), Takahashi et al.

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