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DE69027754D1 - Vormagnetisierungsfeld-Erzeugungsgerät - Google Patents

Vormagnetisierungsfeld-Erzeugungsgerät

Info

Publication number
DE69027754D1
DE69027754D1 DE69027754T DE69027754T DE69027754D1 DE 69027754 D1 DE69027754 D1 DE 69027754D1 DE 69027754 T DE69027754 T DE 69027754T DE 69027754 T DE69027754 T DE 69027754T DE 69027754 D1 DE69027754 D1 DE 69027754D1
Authority
DE
Germany
Prior art keywords
generating device
bias generating
bias
generating
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 - Fee Related
Application number
DE69027754T
Other languages
English (en)
Other versions
DE69027754T2 (de
Inventor
Ichiro Kawamura
Goro Naoki
Yukinori Okazaki
Ryoichi Imanaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP89342677A external-priority patent/JPH03203002A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69027754D1 publication Critical patent/DE69027754D1/de
Publication of DE69027754T2 publication Critical patent/DE69027754T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/1056—Switching or mechanically reversing the magnetic field generator
DE69027754T 1989-12-28 1990-12-27 Vormagnetisierungsfeld-Erzeugungsgerät Expired - Fee Related DE69027754T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP89342677A JPH03203002A (ja) 1989-12-28 1989-12-28 バイアス磁界反転装置
JP33235690 1990-11-28

Publications (2)

Publication Number Publication Date
DE69027754D1 true DE69027754D1 (de) 1996-08-14
DE69027754T2 DE69027754T2 (de) 1996-12-05

Family

ID=26574170

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69027754T Expired - Fee Related DE69027754T2 (de) 1989-12-28 1990-12-27 Vormagnetisierungsfeld-Erzeugungsgerät

Country Status (5)

Country Link
US (1) US5229983A (de)
EP (1) EP0435278B1 (de)
KR (1) KR940001453B1 (de)
CA (1) CA2033275C (de)
DE (1) DE69027754T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570329A (en) * 1995-03-31 1996-10-29 Eastman Kodak Company System for selectively inverting a magnetic bias field for magneto-optic recording
US6570724B1 (en) * 1999-04-26 2003-05-27 Fuji Photo Film Co., Ltd. Method and apparatus for magnetic transfer
JP4046480B2 (ja) * 2001-02-23 2008-02-13 富士フイルム株式会社 磁気転写方法および磁気転写装置
JP7242544B2 (ja) * 2017-03-30 2023-03-20 エルジー イノテック カンパニー リミテッド レンズ駆動装置及びカメラモジュール

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724047A (en) * 1980-07-21 1982-02-08 Matsushita Electric Ind Co Ltd Recorder and reproducer
GB2083677B (en) * 1980-07-16 1985-01-23 Matsushita Electric Industrial Co Ltd Magnetooptical recording medium and a magnetooptical recording-and reeproducing device
JPH0636241B2 (ja) * 1982-09-21 1994-05-11 シャープ株式会社 熱磁気記録装置
JPS5992406A (ja) * 1982-11-17 1984-05-28 Matsushita Electric Ind Co Ltd 光磁気記録装置
JPS59146408A (ja) * 1983-02-09 1984-08-22 Matsushita Electric Ind Co Ltd 光磁気記録媒体用記録消去磁場印加装置
JPS60226044A (ja) * 1984-04-24 1985-11-11 Sony Corp 光磁気記録装置
EP0222916B1 (de) * 1985-04-29 1993-02-03 Sony Corporation Externes magnetfeld-umpolungsgerät für fotomagnetische platten
US4701895A (en) * 1986-03-28 1987-10-20 Rca Corporation Magnetic biasing apparatus for magneto-optic recording including a permanent magnet
JPH07105085B2 (ja) * 1986-07-30 1995-11-13 株式会社日立製作所 光磁気デイスク装置
JPH0727606B2 (ja) * 1986-12-11 1995-03-29 ソニー株式会社 記録型光デイスクに対する磁界印加装置
JPH0661122B2 (ja) * 1987-05-08 1994-08-10 シャープ株式会社 光磁気ディスク装置
US4962492A (en) * 1988-04-29 1990-10-09 Laser Magnetic Storage International Company Magneto-optic data recording system, actuating device therefor and method of providing same
JPH0633526Y2 (ja) * 1988-11-10 1994-08-31 ティアツク株式会社 光磁気ディスク装置
JPH0636481Y2 (ja) * 1989-02-13 1994-09-21 ティアツク株式会社 光磁気ディスク装置のバイアス磁界印加装置

Also Published As

Publication number Publication date
CA2033275A1 (en) 1991-06-29
EP0435278B1 (de) 1996-07-10
KR910013117A (ko) 1991-07-31
DE69027754T2 (de) 1996-12-05
KR940001453B1 (ko) 1994-02-23
EP0435278A3 (en) 1992-09-02
CA2033275C (en) 1994-10-25
EP0435278A2 (de) 1991-07-03
US5229983A (en) 1993-07-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee