Optical information carrier, method for erasing information therein, and optical storage device realizing this method
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United States of America Patent
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Sep 5, 1989
Grant Date -
N/A
app pub date -
Oct 6, 1987
filing date -
Feb 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical information carrier includes a cylinder (1) with a recording layer (2) and bushings (3,4) located at butt ends of the hollow cylinder (1) and insulating the recording layer (2) from the environment. A method for erasing information recorded on the optical carrier uses a high-frequency electrical discharge is produced inside the air-tight closed space (5) of the hollow cylinder (1). An optical storage device realizing the method includes an erasing unit (11) having a circuit for initiating a high-frequency discharge, which has electrodes (12,13) between which the optical carrier (10) is located so that the high-frequency discharge is initiated inside the closed air-tight space (5).
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