JPS63849B2 - - Google Patents

Info

Publication number
JPS63849B2
JPS63849B2 JP54019782A JP1978279A JPS63849B2 JP S63849 B2 JPS63849 B2 JP S63849B2 JP 54019782 A JP54019782 A JP 54019782A JP 1978279 A JP1978279 A JP 1978279A JP S63849 B2 JPS63849 B2 JP S63849B2
Authority
JP
Japan
Prior art keywords
pits
pit
data
state
storage device
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
JP54019782A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55113197A (en
Inventor
Yoshidai Kitaoka
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 JP1978279A priority Critical patent/JPS55113197A/ja
Publication of JPS55113197A publication Critical patent/JPS55113197A/ja
Publication of JPS63849B2 publication Critical patent/JPS63849B2/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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • 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 Recording Or Reproduction (AREA)
JP1978279A 1979-02-23 1979-02-23 Optical memory unit Granted JPS55113197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1978279A JPS55113197A (en) 1979-02-23 1979-02-23 Optical memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1978279A JPS55113197A (en) 1979-02-23 1979-02-23 Optical memory unit

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP17700487A Division JPS63302422A (ja) 1987-07-17 1987-07-17 光学的記憶方法
JP17700587A Division JPH0191323A (ja) 1987-07-17 1987-07-17 光学的記憶装置

Publications (2)

Publication Number Publication Date
JPS55113197A JPS55113197A (en) 1980-09-01
JPS63849B2 true JPS63849B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-01-08

Family

ID=12008889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1978279A Granted JPS55113197A (en) 1979-02-23 1979-02-23 Optical memory unit

Country Status (1)

Country Link
JP (1) JPS55113197A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151241U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1980-04-10 1981-11-12
JPS57181429A (en) * 1981-05-01 1982-11-08 Toshiba Corp Optical disc device
JPS57200947A (en) * 1981-06-01 1982-12-09 Toshiba Corp Information recording method for optical disk
NL8204555A (nl) * 1981-11-25 1983-06-16 Hitachi Ltd Inrichting voor het registreren en weergeven van informatie.
JPS63823A (ja) * 1986-05-17 1988-01-05 Csk Corp 光記録媒体のデ−タ書込／読取方式
JPS62264435A (ja) * 1986-05-12 1987-11-17 Csk Corp 光記録媒体のデ−タ記録方式
JPH0191323A (ja) * 1987-07-17 1989-04-11 Hitachi Ltd 光学的記憶装置
JP2800728B2 (ja) * 1995-08-09 1998-09-21 株式会社日立製作所 情報記録装置及び光学的情報記録媒体製造装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH615827A5 (en) * 1975-10-09 1980-02-29 Givaudan & Cie Sa Use of ethyl 2-ethyl-6,6-dimethyl-2-cyclohexene-1-carboxylate as perfume
NL187413C (nl) * 1978-03-16 1991-09-16 Philips Nv Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager.

Also Published As

Publication number Publication date
JPS55113197A (en) 1980-09-01

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