Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1986-10-16
1989-06-20
Psitss, Aristotelis M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 44, G11B 700
Patent
active
048415146
ABSTRACT:
A light spot determining a first condition that an optical recording medium is cooled after being heated to a temperature exceeding a first temperature and a light spot determining a second condition that the optical recording medium is cooled after being heated to a temperature exceeding a second temperature higher than the room temperature and not exceeding the first temperature higher than the second temperature, namely, the two light spots are radiated onto the optical recording medium and in the same guide track thereof wherein signals are recorded and erased on the optical recording medium by controlling the spot diameter of each light spot and/or the light intensity thereof.
REFERENCES:
patent: 4383261 (1983-05-01), Goldberg
patent: 4530080 (1985-07-01), Aoi et al.
patent: 4566088 (1986-01-01), Yoshida et al.
patent: 4679184 (1987-07-01), Yoshida
patent: 4710911 (1987-12-01), Yamada et al.
Proceedings of Japan Display; 1983, pp. 40-48 "Erasable Optical Disc Using TEOy Thin Film"; Yamada et al., English translation of JP 56-162691 pp. 1-16 attached with JP document.
Sasaki Hiroshi
Sato Yoshio
Shimada Satoshi
Tsuboi Nobuyoshi
Watanabe Atsumi
Hitachi , Ltd.
Psitss Aristotelis M.
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