JPS57212637A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS57212637A
JPS57212637A JP56097084A JP9708481A JPS57212637A JP S57212637 A JPS57212637 A JP S57212637A JP 56097084 A JP56097084 A JP 56097084A JP 9708481 A JP9708481 A JP 9708481A JP S57212637 A JPS57212637 A JP S57212637A
Authority
JP
Japan
Prior art keywords
optical recording
light
layer
sheet member
optical disk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56097084A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0321975B2 (enrdf_load_stackoverflow
Inventor
Michiharu Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56097084A priority Critical patent/JPS57212637A/ja
Publication of JPS57212637A publication Critical patent/JPS57212637A/ja
Publication of JPH0321975B2 publication Critical patent/JPH0321975B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
JP56097084A 1981-06-23 1981-06-23 Optical disk Granted JPS57212637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56097084A JPS57212637A (en) 1981-06-23 1981-06-23 Optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56097084A JPS57212637A (en) 1981-06-23 1981-06-23 Optical disk

Publications (2)

Publication Number Publication Date
JPS57212637A true JPS57212637A (en) 1982-12-27
JPH0321975B2 JPH0321975B2 (enrdf_load_stackoverflow) 1991-03-25

Family

ID=14182767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56097084A Granted JPS57212637A (en) 1981-06-23 1981-06-23 Optical disk

Country Status (1)

Country Link
JP (1) JPS57212637A (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153205U (enrdf_load_stackoverflow) * 1978-04-17 1979-10-24
JPS57120245A (en) * 1981-01-20 1982-07-27 Toshiba Corp Information storage medium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153205U (enrdf_load_stackoverflow) * 1978-04-17 1979-10-24
JPS57120245A (en) * 1981-01-20 1982-07-27 Toshiba Corp Information storage medium

Also Published As

Publication number Publication date
JPH0321975B2 (enrdf_load_stackoverflow) 1991-03-25

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