JPH0250535B2 - - Google Patents

Info

Publication number
JPH0250535B2
JPH0250535B2 JP55179165A JP17916580A JPH0250535B2 JP H0250535 B2 JPH0250535 B2 JP H0250535B2 JP 55179165 A JP55179165 A JP 55179165A JP 17916580 A JP17916580 A JP 17916580A JP H0250535 B2 JPH0250535 B2 JP H0250535B2
Authority
JP
Japan
Prior art keywords
track
index
groups
information
tracks
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
JP55179165A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57103134A (en
Inventor
Kenji Koishi
Tomio Yoshida
Isao Sato
Shunji Harikae
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 JP17916580A priority Critical patent/JPS57103134A/ja
Publication of JPS57103134A publication Critical patent/JPS57103134A/ja
Publication of JPH0250535B2 publication Critical patent/JPH0250535B2/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 Recording Or Reproduction (AREA)
JP17916580A 1980-12-17 1980-12-17 Optical disk Granted JPS57103134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17916580A JPS57103134A (en) 1980-12-17 1980-12-17 Optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17916580A JPS57103134A (en) 1980-12-17 1980-12-17 Optical disk

Publications (2)

Publication Number Publication Date
JPS57103134A JPS57103134A (en) 1982-06-26
JPH0250535B2 true JPH0250535B2 (fr) 1990-11-02

Family

ID=16061070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17916580A Granted JPS57103134A (en) 1980-12-17 1980-12-17 Optical disk

Country Status (1)

Country Link
JP (1) JPS57103134A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0762921B2 (ja) * 1984-04-27 1995-07-05 松下電器産業株式会社 光学的情報担体
JPS6134733A (ja) * 1984-07-25 1986-02-19 Hitachi Ltd 光学デイスク装置
JPS62270032A (ja) * 1986-05-19 1987-11-24 Matsushita Electric Ind Co Ltd 光デイスク駆動装置
US5285440A (en) * 1988-03-18 1994-02-08 Matsushita Electric Industrial Co., Ltd. Magneto-optic disk
WO1989008913A1 (fr) * 1988-03-18 1989-09-21 Matsushita Electric Industrial Co., Ltd. Disque opto-magnetique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379334A (en) * 1976-12-24 1978-07-13 Hitachi Ltd Memory unit
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device
JPS5567949A (en) * 1978-11-08 1980-05-22 Philips Nv Memory carrier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379334A (en) * 1976-12-24 1978-07-13 Hitachi Ltd Memory unit
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device
JPS5567949A (en) * 1978-11-08 1980-05-22 Philips Nv Memory carrier

Also Published As

Publication number Publication date
JPS57103134A (en) 1982-06-26

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