JPS57141035A - Optical recording and reproducing disc - Google Patents

Optical recording and reproducing disc

Info

Publication number
JPS57141035A
JPS57141035A JP56027343A JP2734381A JPS57141035A JP S57141035 A JPS57141035 A JP S57141035A JP 56027343 A JP56027343 A JP 56027343A JP 2734381 A JP2734381 A JP 2734381A JP S57141035 A JPS57141035 A JP S57141035A
Authority
JP
Japan
Prior art keywords
region
track
regions
disc
evaluation
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
JP56027343A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0250536B2 (enrdf_load_html_response
Inventor
Tomio Yoshida
Noboru Wakami
Tamotsu Matsuo
Haruo Yamashita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56027343A priority Critical patent/JPS57141035A/ja
Publication of JPS57141035A publication Critical patent/JPS57141035A/ja
Publication of JPH0250536B2 publication Critical patent/JPH0250536B2/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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Manufacturing Optical Record Carriers (AREA)
JP56027343A 1981-02-25 1981-02-25 Optical recording and reproducing disc Granted JPS57141035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027343A JPS57141035A (en) 1981-02-25 1981-02-25 Optical recording and reproducing disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027343A JPS57141035A (en) 1981-02-25 1981-02-25 Optical recording and reproducing disc

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP24714989A Division JPH02126426A (ja) 1989-09-22 1989-09-22 光学的記録再生装置

Publications (2)

Publication Number Publication Date
JPS57141035A true JPS57141035A (en) 1982-09-01
JPH0250536B2 JPH0250536B2 (enrdf_load_html_response) 1990-11-02

Family

ID=12218397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027343A Granted JPS57141035A (en) 1981-02-25 1981-02-25 Optical recording and reproducing disc

Country Status (1)

Country Link
JP (1) JPS57141035A (enrdf_load_html_response)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169352A (ja) * 1982-03-31 1983-10-05 Hitachi Ltd 光学的記録媒体
JPS59180229U (ja) * 1983-05-20 1984-12-01 三洋電機株式会社 光学記録媒体
JPS61172233A (ja) * 1985-01-25 1986-08-02 Nec Corp 光デイスク用基板
JPH027243A (ja) * 1989-03-14 1990-01-11 Hitachi Maxell Ltd 光ディスクおよびその製造方法
JPH02247840A (ja) * 1989-03-20 1990-10-03 Nec Corp 光ディスク基板
JPH062381U (ja) * 1992-06-08 1994-01-14 有限会社民芸品さとう 値 札
JPH06203413A (ja) * 1993-09-27 1994-07-22 Hitachi Ltd 光学的記録媒体及び記録再生方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5479004A (en) * 1977-12-06 1979-06-23 Victor Co Of Japan Ltd Disc form recording medium
JPS5616949A (en) * 1979-07-16 1981-02-18 Discovision Ass Home video player*recorder and blank recording disk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5479004A (en) * 1977-12-06 1979-06-23 Victor Co Of Japan Ltd Disc form recording medium
JPS5616949A (en) * 1979-07-16 1981-02-18 Discovision Ass Home video player*recorder and blank recording disk

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169352A (ja) * 1982-03-31 1983-10-05 Hitachi Ltd 光学的記録媒体
JPS59180229U (ja) * 1983-05-20 1984-12-01 三洋電機株式会社 光学記録媒体
JPS61172233A (ja) * 1985-01-25 1986-08-02 Nec Corp 光デイスク用基板
JPH027243A (ja) * 1989-03-14 1990-01-11 Hitachi Maxell Ltd 光ディスクおよびその製造方法
JPH02247840A (ja) * 1989-03-20 1990-10-03 Nec Corp 光ディスク基板
JPH062381U (ja) * 1992-06-08 1994-01-14 有限会社民芸品さとう 値 札
JPH06203413A (ja) * 1993-09-27 1994-07-22 Hitachi Ltd 光学的記録媒体及び記録再生方法

Also Published As

Publication number Publication date
JPH0250536B2 (enrdf_load_html_response) 1990-11-02

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