JPS6331857B2 - - Google Patents

Info

Publication number
JPS6331857B2
JPS6331857B2 JP56200518A JP20051881A JPS6331857B2 JP S6331857 B2 JPS6331857 B2 JP S6331857B2 JP 56200518 A JP56200518 A JP 56200518A JP 20051881 A JP20051881 A JP 20051881A JP S6331857 B2 JPS6331857 B2 JP S6331857B2
Authority
JP
Japan
Prior art keywords
signal
recording
level detection
optical disk
level
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
Application number
JP56200518A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58102338A (ja
Inventor
Koichi Yamada
Seio Watanabe
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56200518A priority Critical patent/JPS58102338A/ja
Publication of JPS58102338A publication Critical patent/JPS58102338A/ja
Publication of JPS6331857B2 publication Critical patent/JPS6331857B2/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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)
JP56200518A 1981-12-11 1981-12-11 光デイスク記録・再生装置 Granted JPS58102338A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56200518A JPS58102338A (ja) 1981-12-11 1981-12-11 光デイスク記録・再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56200518A JPS58102338A (ja) 1981-12-11 1981-12-11 光デイスク記録・再生装置

Publications (2)

Publication Number Publication Date
JPS58102338A JPS58102338A (ja) 1983-06-17
JPS6331857B2 true JPS6331857B2 (enrdf_load_html_response) 1988-06-27

Family

ID=16425640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56200518A Granted JPS58102338A (ja) 1981-12-11 1981-12-11 光デイスク記録・再生装置

Country Status (1)

Country Link
JP (1) JPS58102338A (enrdf_load_html_response)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6151631A (ja) * 1984-08-20 1986-03-14 Sharp Corp 光磁気メモリ素子
NL193159C (nl) * 1985-06-19 1998-12-04 Hitachi Ltd Voorgevormde registratiedrager voor het daarin met behulp van een lichtvlek schrijven van informatie.
JPH0746429B2 (ja) * 1985-06-21 1995-05-17 オリンパス光学工業株式会社 光学式記録再生装置
JPH0619836B2 (ja) * 1985-11-11 1994-03-16 株式会社日立製作所 閾値レベル自動制御回路
US5107486A (en) * 1985-12-04 1992-04-21 Sharp Kabushiki Kaisha Optical memory device with grooves and pits in selected dimensional relationship
JP2693289B2 (ja) * 1991-08-09 1997-12-24 シャープ株式会社 光メモリ

Also Published As

Publication number Publication date
JPS58102338A (ja) 1983-06-17

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