DE3780317D1 - Vorrichtung zum erzeugen eines in magneto-optischer aufzeichnung benutzten, hochfrequenzmodulierten magnetfeldes. - Google Patents

Vorrichtung zum erzeugen eines in magneto-optischer aufzeichnung benutzten, hochfrequenzmodulierten magnetfeldes.

Info

Publication number
DE3780317D1
DE3780317D1 DE8787100954T DE3780317T DE3780317D1 DE 3780317 D1 DE3780317 D1 DE 3780317D1 DE 8787100954 T DE8787100954 T DE 8787100954T DE 3780317 T DE3780317 T DE 3780317T DE 3780317 D1 DE3780317 D1 DE 3780317D1
Authority
DE
Germany
Prior art keywords
magneto
generating
magnetic field
optical recording
frequency modulated
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
DE8787100954T
Other languages
English (en)
Other versions
DE3780317T2 (de
Inventor
Masatoshi Hayakawa
Takehiro Nagaki
Koichi Aso
Hiroshi Yamanoi
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.)
Sony Corp
Original Assignee
Sony 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
Priority claimed from JP1099686A external-priority patent/JPS62172504A/ja
Priority claimed from JP19561586A external-priority patent/JPS6353703A/ja
Application filed by Sony Corp filed Critical Sony Corp
Publication of DE3780317D1 publication Critical patent/DE3780317D1/de
Application granted granted Critical
Publication of DE3780317T2 publication Critical patent/DE3780317T2/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
    • 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
    • G11B11/10532—Heads
DE8787100954T 1986-01-23 1987-01-23 Vorrichtung zum erzeugen eines in magneto-optischer aufzeichnung benutzten, hochfrequenzmodulierten magnetfeldes. Expired - Fee Related DE3780317T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1099686A JPS62172504A (ja) 1986-01-23 1986-01-23 高周波変調磁界発生装置
JP19561586A JPS6353703A (ja) 1986-08-22 1986-08-22 高周波変調磁界発生装置

Publications (2)

Publication Number Publication Date
DE3780317D1 true DE3780317D1 (de) 1992-08-20
DE3780317T2 DE3780317T2 (de) 1993-03-04

Family

ID=26346358

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787100954T Expired - Fee Related DE3780317T2 (de) 1986-01-23 1987-01-23 Vorrichtung zum erzeugen eines in magneto-optischer aufzeichnung benutzten, hochfrequenzmodulierten magnetfeldes.

Country Status (4)

Country Link
US (1) US4796241A (de)
EP (1) EP0230325B1 (de)
CA (1) CA1280207C (de)
DE (1) DE3780317T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020041A (en) * 1987-03-06 1991-05-28 Hitachi, Ltd. Magneto-optical memory apparatus having a floating magnetic head
US5270987A (en) * 1988-02-08 1993-12-14 Hitachi, Ltd. Magneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium therefor
JPH01287804A (ja) * 1988-02-15 1989-11-20 Alps Electric Co Ltd 光磁気記録装置用磁気ヘッド
US5101385A (en) * 1988-03-14 1992-03-31 Bernoulli Optical Systems Company Magneto-optical information storage system for flexible media having maximum overwrite efficiency
US5014254A (en) * 1988-05-09 1991-05-07 U.S. Philips Corporation Magneto-optical recording method and magneto-optical recording apparatus
US5343448A (en) * 1988-07-20 1994-08-30 Sharp Kabushiki Kaiasha External magnetic field device for a magnetooptical information recording and reproducing apparatus
JPH0661123B2 (ja) * 1988-10-28 1994-08-10 株式会社日立製作所 光学磁気記録再生装置
JP2574903B2 (ja) * 1989-10-11 1997-01-22 シャープ株式会社 光磁気記録装置
NL8902728A (nl) * 1989-11-06 1991-06-03 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
US5124961A (en) * 1989-12-28 1992-06-23 Fuji Xerox Co., Ltd. Floating head for use with a recording apparatus of magneto-optical memory device
JP2784829B2 (ja) * 1990-02-06 1998-08-06 ソニー株式会社 記録信号磁界発生装置
US5361242A (en) * 1990-02-07 1994-11-01 Canon Kabushiki Kaisha External magnetic field application device including a heat dissipation member and a metal plate for dissipating heat
US5239425A (en) * 1990-02-28 1993-08-24 Alps Electric Co., Ltd. Magnetic head for magneto-optical recording device
US5200934A (en) * 1991-02-06 1993-04-06 Research Corporation Technologies, Inc. Method and apparatus for direct overwrite on magneto-optical recording media using circularly polarized microwaves
EP0592219B1 (de) * 1992-10-09 2001-07-25 Canon Kabushiki Kaisha Magnetkopf für magnetooptische Aufzeichnung und magnetooptisches Aufzeichnungsgerät
JP3153947B2 (ja) * 1993-04-28 2001-04-09 ソニー株式会社 磁気ヘッド及び光磁気記録装置
JP3021263B2 (ja) * 1993-12-09 2000-03-15 アルプス電気株式会社 磁気ヘッド装置
JP3406057B2 (ja) * 1994-04-13 2003-05-12 アルプス電気株式会社 光磁気記録用磁気ヘッド
JP3542386B2 (ja) * 1994-10-13 2004-07-14 キヤノン株式会社 磁気ヘッドおよび光磁気記録装置
EP0996113A4 (de) * 1998-03-30 2006-02-22 Japan Science & Tech Agency Magnetaufzeichungsverfahren und -gerät
JP2001056902A (ja) * 1999-06-11 2001-02-27 Sharp Corp 磁気ヘッド
JP2002367109A (ja) * 2001-06-08 2002-12-20 Canon Inc 光磁気記録用磁気ヘッドおよび光磁気記録装置
JP2005502148A (ja) * 2001-09-06 2005-01-20 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ 磁区拡大技術の磁界特性を改善するヘッド装置
US7768741B2 (en) * 2006-05-22 2010-08-03 Hitachi Global Storage Technologies Netherlands B.V. Magnetic write head design for reducing wide area track erasure

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946349A (en) * 1971-05-03 1976-03-23 The United States Of America As Represented By The Secretary Of The Air Force High-power, low-loss high-frequency electrical coil
JPS5616917A (en) * 1979-07-17 1981-02-18 Olympus Optical Co Ltd Thermal and magnetic recorder
JPS5715203A (en) * 1980-06-28 1982-01-26 Sharp Corp Photomagnetic recording and reproducing device
JPS5766537A (en) * 1980-10-09 1982-04-22 Sharp Corp Magnetooptic recording and reproducing device
JPS5794906A (en) * 1980-12-05 1982-06-12 Ricoh Co Ltd Optical magnetic recorder
JPS57113406A (en) * 1980-12-30 1982-07-14 Ricoh Co Ltd Vertical magnetic recording head
JPS57164459A (en) * 1981-04-02 1982-10-09 Ricoh Co Ltd Method and device for vertical magnetic recording light reproduction
JPS57186209A (en) * 1981-05-12 1982-11-16 Ricoh Co Ltd Vertical thermomagnetic recording system
JPS5850639A (ja) * 1981-09-18 1983-03-25 Ricoh Co Ltd 垂直磁化記録媒体
JPS58146008A (ja) * 1982-02-24 1983-08-31 Shiro Okamura 光磁気記録装置
SU1053170A1 (ru) * 1982-07-14 1983-11-07 Производственное Объединение "Уралэлектротяжмаш" Им.В.И.Ленина Трансформатор
US4507640A (en) * 1982-11-26 1985-03-26 Westinghouse Electric Co. High frequency transformer
JPS59119507A (ja) * 1982-12-27 1984-07-10 Fujitsu Ltd 光磁気記録装置
JPS59148164A (ja) * 1983-02-15 1984-08-24 Seiko Epson Corp 磁気記録再生装置
JPS61148687A (ja) * 1984-12-20 1986-07-07 Fujitsu Ltd 光磁気デイスク用カ−トリツジ

Also Published As

Publication number Publication date
EP0230325B1 (de) 1992-07-15
EP0230325A2 (de) 1987-07-29
US4796241A (en) 1989-01-03
EP0230325A3 (en) 1989-08-30
DE3780317T2 (de) 1993-03-04
CA1280207C (en) 1991-02-12

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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