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

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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
    • G11B11/10502Recording 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
    • G11B11/10504Recording
    • G11B11/10508Recording by modulating only the magnetic field at the transducer
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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

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