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Title:
OPTICAL DISC PROTECTED FROM HUMIDITY
Document Type and Number:
Japanese Patent JPS58171734
Kind Code:
A
Abstract:
A protected optical disc intended for the recording of information is protected against the harmful consequences of humidity by the presence of a hydrophylous material situated at a particular distance from the recording surface, which thus retains a high sensitivity during the write or read operations. The invention may be applied especially to discs intended for digital recording.

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Inventors:
JIYAN KORUNE
Application Number:
JP4778483A
Publication Date:
October 08, 1983
Filing Date:
March 22, 1983
Export Citation:
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Assignee:
THOMSON CSF
International Classes:
B41M5/24; B41M5/26; G11B7/24; (IPC1-7): B41M5/24; G11B7/24; G11C13/04
Domestic Patent References:
JPS5548837A1980-04-08
JPS5496002A1979-07-30
JPS531002A1978-01-07
JPS56156940A1981-12-03
Attorney, Agent or Firm:
Yoshio Kawaguchi



 
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