JPS55113197A - Optical memory unit - Google Patents

Optical memory unit

Info

Publication number
JPS55113197A
JPS55113197A JP1978279A JP1978279A JPS55113197A JP S55113197 A JPS55113197 A JP S55113197A JP 1978279 A JP1978279 A JP 1978279A JP 1978279 A JP1978279 A JP 1978279A JP S55113197 A JPS55113197 A JP S55113197A
Authority
JP
Japan
Prior art keywords
spots
track
data
interval
binary
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
JP1978279A
Other languages
English (en)
Japanese (ja)
Other versions
JPS63849B2 (enrdf_load_stackoverflow
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 true JPS55113197A (en) 1980-09-01
JPS63849B2 JPS63849B2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151241U (enrdf_load_stackoverflow) * 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
FR2517103A1 (fr) * 1981-11-25 1983-05-27 Hitachi Ltd Appareil d'enregistrement et de reproduction d'informations
JPS62264435A (ja) * 1986-05-12 1987-11-17 Csk Corp 光記録媒体のデ−タ記録方式
JPS63823A (ja) * 1986-05-17 1988-01-05 Csk Corp 光記録媒体のデ−タ書込／読取方式
JPH0191323A (ja) * 1987-07-17 1989-04-11 Hitachi Ltd 光学的記憶装置
JPH0855430A (ja) * 1995-08-09 1996-02-27 Hitachi Ltd 情報記録装置及び光学的情報記録媒体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246052A (en) * 1975-10-09 1977-04-12 Givaudan & Cie Sa Aromatic compositions
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246052A (en) * 1975-10-09 1977-04-12 Givaudan & Cie Sa Aromatic compositions
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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151241U (enrdf_load_stackoverflow) * 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
FR2517103A1 (fr) * 1981-11-25 1983-05-27 Hitachi Ltd Appareil d'enregistrement et de reproduction d'informations
FR2569038A1 (fr) * 1981-11-25 1986-02-14 Hitachi Ltd Appareil d'enregistrement et de reproduction d'informations
JPS62264435A (ja) * 1986-05-12 1987-11-17 Csk Corp 光記録媒体のデ−タ記録方式
JPS63823A (ja) * 1986-05-17 1988-01-05 Csk Corp 光記録媒体のデ−タ書込／読取方式
JPH0191323A (ja) * 1987-07-17 1989-04-11 Hitachi Ltd 光学的記憶装置
JPH0855430A (ja) * 1995-08-09 1996-02-27 Hitachi Ltd 情報記録装置及び光学的情報記録媒体

Also Published As

Publication number Publication date
JPS63849B2 (enrdf_load_stackoverflow) 1988-01-08

Similar Documents

Publication Publication Date Title
AU503889B2 (en) Disc track servo system
JPS5778679A (en) Track followup servo controlling method and recording medium
DE3066613D1 (en) Buried servo track data recording systems
AU510555B2 (en) Velocity and phase control for disc play / record system
AU504718B2 (en) Servo system for head / track alignment
NZ181796A (en) Radial jump control of read beam on optically coded disc
DE68918495D1 (de) Medium mit hoher Spurdichte und optischen Servospuren; Methode und Gerät zum Einschreiben der Spuren auf das Medium.
GB2064172B (en) Speed servo control systems for disc record reproducing apparatus
JPS6464125A (en) Optical recording and reproducing method
EP0160095A4 (en) TRACK GUIDE CONTROL FOR OPTICAL PLATES.
GB2030346B (en) Playback head tracking control system
GB2071879B (en) Recorder head tracking control system
DE3572070D1 (en) Tracking control system for optical record disc information reproducing apparatus
DE3066157D1 (en) Arrangement for track-dependent position control in a system for recording and/or reproducing information on a magnetic recording disc, particularly of the flexible type and a magnetic recording disc therefor
AU549858B2 (en) Magnetic disk head servo control
DE3888296D1 (de) Optisches Informationsaufzeichnungs- und -löschverfahren.
JPS55113197A (en) Optical memory unit
AU511031B2 (en) Ablative optical recording medium
FI831389L (fi) Kontrollerad stroemkaella.
NO855225L (no) Fremgangsmaate for detektering og registrering av defelter paa varme metallurgiske halvfabrikata.
JPS5313309A (en) Optically reproducing unit
EP0627731A3 (en) Reproduction apparatus comprising means for tracking tracks.
JPS5534340A (en) Recording reproducing system by light beam
DE68922045D1 (de) Informationsaufzeichnungsmedium und dasselbe verwendendes Aufzeichnungs/-Wiedergabegerät.
JPS6489029A (en) Recording carrier optical reader