JPH0221061B2 - - Google Patents

Info

Publication number
JPH0221061B2
JPH0221061B2 JP56146252A JP14625281A JPH0221061B2 JP H0221061 B2 JPH0221061 B2 JP H0221061B2 JP 56146252 A JP56146252 A JP 56146252A JP 14625281 A JP14625281 A JP 14625281A JP H0221061 B2 JPH0221061 B2 JP H0221061B2
Authority
JP
Japan
Prior art keywords
recording
disk
center
track
thin film
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.)
Expired - Lifetime
Application number
JP56146252A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5850636A (ja
Inventor
Toshimasa Kamisada
Hiroshi Kitani
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56146252A priority Critical patent/JPS5850636A/ja
Publication of JPS5850636A publication Critical patent/JPS5850636A/ja
Publication of JPH0221061B2 publication Critical patent/JPH0221061B2/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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
JP56146252A 1981-09-18 1981-09-18 記録再生デイスク Granted JPS5850636A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56146252A JPS5850636A (ja) 1981-09-18 1981-09-18 記録再生デイスク

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56146252A JPS5850636A (ja) 1981-09-18 1981-09-18 記録再生デイスク

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3151457A Division JPH04263168A (ja) 1991-06-24 1991-06-24 記録再生装置

Publications (2)

Publication Number Publication Date
JPS5850636A JPS5850636A (ja) 1983-03-25
JPH0221061B2 true JPH0221061B2 (en]) 1990-05-11

Family

ID=15403531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56146252A Granted JPS5850636A (ja) 1981-09-18 1981-09-18 記録再生デイスク

Country Status (1)

Country Link
JP (1) JPS5850636A (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0636253B2 (ja) * 1983-08-18 1994-05-11 シャープ株式会社 光メモリ円板

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074282A (en) * 1976-05-13 1978-02-14 North American Philips Corporation Radiation-sensitive record with protected sensitive surface
JPS5446515U (en]) * 1977-09-07 1979-03-31

Also Published As

Publication number Publication date
JPS5850636A (ja) 1983-03-25

Similar Documents

Publication Publication Date Title
EP0286032B1 (en) Disk apparatus
US4827469A (en) Optically readable information disk
JPH0221061B2 (en])
JPS63175229A (ja) 磁気転写方式
JPS61156547A (ja) 円盤状記録媒体の作製方法
JPH04263168A (ja) 記録再生装置
JP2548235B2 (ja) 光記録媒体
JP2507366B2 (ja) 情報記憶媒体
JP2674067B2 (ja) 光ディスク
JP2953473B2 (ja) 磁気ディスク装置並びに該装置に用いるディスク及びその組み込み方法
JPH0516693Y2 (en])
JP2512710B2 (ja) 光ディスクならびにその製造方法
JPH0477973B2 (en])
JPH0477392B2 (en])
JPH01220191A (ja) ディスク装置
JPH056643A (ja) 光カード
JPS61158052A (ja) 両面情報担体デイスク
JPS61236048A (ja) 無偏心型光情報媒体の製造方法
JPH0531721Y2 (en])
JPS63153776A (ja) 情報デイスク
JPH0822639A (ja) 光ディスク及びその製造方法
JPH02310871A (ja) ディスク取付け部の構造
JPH087329A (ja) 両面同時記録再生用光ディスクおよび その製造方法
JPS63291230A (ja) 光デイスクの製造方法
JPS6028041B2 (ja) 信号記録用ディスクの製造方法