DE69025108T2 - Magnetooptischer Kopf - Google Patents

Magnetooptischer Kopf

Info

Publication number
DE69025108T2
DE69025108T2 DE69025108T DE69025108T DE69025108T2 DE 69025108 T2 DE69025108 T2 DE 69025108T2 DE 69025108 T DE69025108 T DE 69025108T DE 69025108 T DE69025108 T DE 69025108T DE 69025108 T2 DE69025108 T2 DE 69025108T2
Authority
DE
Germany
Prior art keywords
magneto
optical head
optical
head
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
DE69025108T
Other languages
English (en)
Other versions
DE69025108D1 (de
Inventor
Kazunori Miura
Ippei Sawaki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 JP14930190A external-priority patent/JP2797659B2/ja
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of DE69025108D1 publication Critical patent/DE69025108D1/de
Publication of DE69025108T2 publication Critical patent/DE69025108T2/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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10539—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using electromagnetic beams, e.g. polarised light
DE69025108T 1989-08-19 1990-08-15 Magnetooptischer Kopf Expired - Fee Related DE69025108T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP21345389 1989-08-19
JP21773689 1989-08-24
JP14930190A JP2797659B2 (ja) 1989-08-19 1990-06-07 光磁気記録読み取り用光磁気ヘッド

Publications (2)

Publication Number Publication Date
DE69025108D1 DE69025108D1 (de) 1996-03-14
DE69025108T2 true DE69025108T2 (de) 1996-05-30

Family

ID=27319718

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69025108T Expired - Fee Related DE69025108T2 (de) 1989-08-19 1990-08-15 Magnetooptischer Kopf

Country Status (3)

Country Link
US (1) US5235588A (de)
EP (1) EP0414440B1 (de)
DE (1) DE69025108T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2037428C (en) * 1990-03-05 1997-04-01 Akira Takahashi Reproducing optical device for a magneto-optical recording medium
JPH0520725A (ja) * 1991-07-11 1993-01-29 Sony Corp 光ピツクアツプ装置
US5448536A (en) * 1992-06-16 1995-09-05 Hitachi, Ltd. Magneto-optical recording device having an optical head capable of generating a circularly polarized light beam
US5657307A (en) * 1995-03-10 1997-08-12 Sharp Kabushiki Kaisha Optical data reading apparatus and method
CN102253350B (zh) * 2011-05-03 2014-01-29 西安交通大学 基于磁光成像的开关电弧磁场测量装置及测量方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3787033T2 (de) * 1986-01-08 1993-12-09 Victor Company Of Japan Optische Aufnahme und/oder Wiedergabe von Informationssignalen.
CA1322599C (en) * 1988-01-13 1993-09-28 Nobuhiro Fukushima Floating type magneto-optic disk reading head system having external semiconductor laser resonator operating at orthogonal two mode oscillations
JP2528685B2 (ja) * 1988-01-13 1996-08-28 富士通株式会社 光磁気ディスクの読み取り方法および読み取りヘッド

Also Published As

Publication number Publication date
EP0414440A3 (en) 1992-12-23
EP0414440B1 (de) 1996-01-31
EP0414440A2 (de) 1991-02-27
DE69025108D1 (de) 1996-03-14
US5235588A (en) 1993-08-10

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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