JPS6222186B2 - - Google Patents

Info

Publication number
JPS6222186B2
JPS6222186B2 JP15484976A JP15484976A JPS6222186B2 JP S6222186 B2 JPS6222186 B2 JP S6222186B2 JP 15484976 A JP15484976 A JP 15484976A JP 15484976 A JP15484976 A JP 15484976A JP S6222186 B2 JPS6222186 B2 JP S6222186B2
Authority
JP
Japan
Prior art keywords
track
recorded
signal
disk
information
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
JP15484976A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5379334A (en
Inventor
Kazuo Shigematsu
Takeshi Maeda
Zenji Tsutsumi
Seiichi Mita
Seiji Yonezawa
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 JP15484976A priority Critical patent/JPS5379334A/ja
Publication of JPS5379334A publication Critical patent/JPS5379334A/ja
Publication of JPS6222186B2 publication Critical patent/JPS6222186B2/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP15484976A 1976-12-24 1976-12-24 Memory unit Granted JPS5379334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15484976A JPS5379334A (en) 1976-12-24 1976-12-24 Memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15484976A JPS5379334A (en) 1976-12-24 1976-12-24 Memory unit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP29481586A Division JPS62275324A (ja) 1986-12-12 1986-12-12 アクセス方法

Publications (2)

Publication Number Publication Date
JPS5379334A JPS5379334A (en) 1978-07-13
JPS6222186B2 true JPS6222186B2 (en]) 1987-05-16

Family

ID=15593234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15484976A Granted JPS5379334A (en) 1976-12-24 1976-12-24 Memory unit

Country Status (1)

Country Link
JP (1) JPS5379334A (en])

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103134A (en) * 1980-12-17 1982-06-26 Matsushita Electric Ind Co Ltd Optical disk
JPS6133224U (ja) * 1984-07-27 1986-02-28 日本電気ホームエレクトロニクス株式会社 光記録カ−ド
JPS63122071A (ja) * 1986-11-11 1988-05-26 Sony Corp デイスク状記録媒体

Also Published As

Publication number Publication date
JPS5379334A (en) 1978-07-13

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