Optical memory device with grooves and pits in selected dimensio

Details Optical memory device with grooves and pits in selected dimensio Optical memory device with grooves and pits in selected dimensio

1990-03-21

1992-04-21

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692751, G11B 724

Patent

active

051074869

ABSTRACT:
An optical memory device has grooves for guiding a light spot and pits for serving as track number indicators. The width W.sub.1 and depth d.sub.1 of the grooves and the width W.sub.2 and depth d.sub.2 of the pits are so selected that 2D(W.sub.1, d.sub.1)=1+D(W.sub.2, d.sub.2) where D(W.sub.1, d.sub.1) and D(W.sub.2, d.sub.2) are respectively the reflectivity of the groove and the pit.

REFERENCES:
patent: 4587648 (1986-05-01), Ando
Fujii et al., "Groove Characteristics of Reag.-op disk", published in Sharp Giho, No. 33, p. 22 (1985).

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