Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1985-12-04
1988-07-12
Cardillo, Raymond F.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369275, 369288, 346 76L, 3461351, G11B 724
Patent
active
047574925
ABSTRACT:
A method for recording and reproducing information on or from an optical recording medium, which comprises:
recording information by illuminating light to the optical recording medium which is equipped as a recording film with a thin film comprising dispersed fine grains of a material capable of showing a metal-insulator transition to cause the metal-insulator transition owing to the heating effect of the light; and reproducing the information by utilizing changes in optical characteristics owing to a plasma resonance absorption by the fine grains dispersed in the thin film. The method of this invention permits high-density recording with high sensitivity and upon reproduction, enables reproduction of record with a high signal
oise ratio. The recording medium obtained by this method is an erasable optical recording medium, which permits its reutilization for recording and reproduction after erasure of the previously-stored record.
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Fukushima Noburu
Komatsu Shuichi
Sahashi Masashi
Yoshino Hisashi
Cardillo Raymond F.
Kabushiki Kaisha Toshiba
Nguyen T. Hoa
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