DE68909137D1 - Äussere Magnetfeldvorrichtung für ein magneto-optisches Aufzeichnungs- und Wiedergabegerät. - Google Patents

Äussere Magnetfeldvorrichtung für ein magneto-optisches Aufzeichnungs- und Wiedergabegerät.

Info

Publication number
DE68909137D1
DE68909137D1 DE89307336T DE68909137T DE68909137D1 DE 68909137 D1 DE68909137 D1 DE 68909137D1 DE 89307336 T DE89307336 T DE 89307336T DE 68909137 T DE68909137 T DE 68909137T DE 68909137 D1 DE68909137 D1 DE 68909137D1
Authority
DE
Germany
Prior art keywords
magneto
magnetic field
optical recording
external magnetic
reproducing 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 - Lifetime
Application number
DE89307336T
Other languages
English (en)
Other versions
DE68909137T2 (de
Inventor
Tomoyuki Miyake
Hiroyuki Katayama
Junichiro Nakayama
Takahiro Miyake
Kenji Ohta
Shozo Kobayashi
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of DE68909137D1 publication Critical patent/DE68909137D1/de
Application granted granted Critical
Publication of DE68909137T2 publication Critical patent/DE68909137T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
DE89307336T 1988-07-20 1989-07-19 Äussere Magnetfeldvorrichtung für ein magneto-optisches Aufzeichnungs- und Wiedergabegerät. Expired - Lifetime DE68909137T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63180711A JPH065562B2 (ja) 1988-07-20 1988-07-20 光磁気記録再生装置の外部磁界装置

Publications (2)

Publication Number Publication Date
DE68909137D1 true DE68909137D1 (de) 1993-10-21
DE68909137T2 DE68909137T2 (de) 1994-02-03

Family

ID=16087978

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89307336T Expired - Lifetime DE68909137T2 (de) 1988-07-20 1989-07-19 Äussere Magnetfeldvorrichtung für ein magneto-optisches Aufzeichnungs- und Wiedergabegerät.

Country Status (5)

Country Link
EP (1) EP0352099B1 (de)
JP (1) JPH065562B2 (de)
KR (1) KR930003132B1 (de)
CA (1) CA1325676C (de)
DE (1) DE68909137T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07118106B2 (ja) * 1990-03-08 1995-12-18 パイオニア株式会社 光磁気記録再生装置
JP2636957B2 (ja) * 1990-08-10 1997-08-06 シャープ株式会社 磁気記録再生装置
JP3098896B2 (ja) * 1992-06-23 2000-10-16 キヤノン株式会社 光磁気記録装置
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139120A (ja) * 1983-01-25 1984-08-09 Seiko Epson Corp 磁気記録装置
US4841407A (en) * 1986-06-16 1989-06-20 Canon Kabushiki Kaisha Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same

Also Published As

Publication number Publication date
KR900002266A (ko) 1990-02-28
EP0352099B1 (de) 1993-09-15
JPH0231301A (ja) 1990-02-01
EP0352099A2 (de) 1990-01-24
DE68909137T2 (de) 1994-02-03
KR930003132B1 (ko) 1993-04-22
CA1325676C (en) 1993-12-28
JPH065562B2 (ja) 1994-01-19
EP0352099A3 (de) 1991-10-09

Similar Documents

Publication Publication Date Title
DE68923116T2 (de) Magnetisches Aufzeichnungs- und Wiedergabegerät.
DE69031921T2 (de) Magnetisches Aufzeichnungs- und Wiedergabegerät
DE68920058D1 (de) Magnetisches Aufnahme-/Wiedergabegerät.
DE69032423D1 (de) Informationsaufzeichnungs- und -wiedergabevorrichtung für eine Kamera
DE3684528D1 (de) Steuersignalaufzeichnungsvorrichtung fuer ein magnetisches aufzeichnungs- und wiedergabegeraet.
DE69132614T2 (de) Dünnfilmmagnetkopf für eine magneto-optische Platteneinheit
DE3869264D1 (de) Magnetisches aufzeichnungs- und wiedergabegeraet.
DE68925915T2 (de) Magnetisches Aufzeichnungs- und Wiedergabegerät
DE68924417D1 (de) Magnetische aufnahme-/wiedergabevorrichtung.
DE68927124D1 (de) Magnetband Aufnahme- und Wiedergabegerät
DE3888622D1 (de) Magnetisches Aufzeichnungs- und Wiedergabegerät.
KR860700200A (ko) 자기 기록 재생장치
DE68923767D1 (de) Magnetisches Aufzeichnungs-/Wiedergabegerät.
DE68919788T2 (de) Bandlademechanismus für magnetische Aufnahme- und Wiedergabevorrichtungen.
DE68915028T2 (de) Magnetisches Aufzeichnungs- und Wiedergabegerät.
DE68920921T2 (de) Magnetisches Aufnahme- und Wiedergabegerät.
DE68909137D1 (de) Äussere Magnetfeldvorrichtung für ein magneto-optisches Aufzeichnungs- und Wiedergabegerät.
DE68919052D1 (de) Magnetband-Aufnahme-/Wiedergabegerät.
DE69022464T2 (de) Steuergerät zur Spurverfolgung für ein magnetisches Aufzeichnungs- und Wiedergabegerät.
DE68926983T2 (de) Magnetisches Band-Aufnahme und -Wiedergabegerät
DE69026419T2 (de) Magnetisches Aufzeichungs- und Wiedergabegerät
DE68915026D1 (de) Magnetisches Aufnahme- und Wiedergabegerät.
DE3877616T2 (de) Magnetische aufzeichnungs- und wiedergabevorrichtung.
DE68920760T2 (de) Bandführungsvorrichtung für ein magnetisches Aufnahme-/Wiedergabegerät.
KR850005659A (ko) 자기 기록 재생 장치

Legal Events

Date Code Title Description
8364 No opposition during term of opposition