Optical disk

Details Optical disk Optical disk

1983-07-08

1986-04-29

Faber, Alan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369109, 369279, G11B 724

Patent

active

045861730

ABSTRACT:
In an optical disk, a light reflective layer is formed on a transparent substrate, and a groove serving as a tracking guide is formed on the surface of said light reflective layer, continuously extending along the circumference of the optical disk. Pits are formed in a light reflective layer on the bottom surface of the tracking guide. The depth and width of said groove are ##EQU1## and w0/2, respectively, and those of said pits are ##EQU2## and w0/3, respectively, where .lambda. is the wavelength of a laser beam, w0 is the diameter of a laser beam spot on the optical disk, and n is an integer.

REFERENCES:
patent: 4161752 (1979-07-01), Basilico
patent: 4252889 (1981-02-01), Linet
patent: 4310916 (1982-01-01), Dil
patent: 4385303 (1983-05-01), Akahira
patent: 4417331 (1983-11-01), Lakaoka
patent: 4423502 (1983-12-01), Dil
patent: 4513407 (1985-04-01), Bricot
patent: 4517666 (1985-05-01), Ando

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