DE3882262D1 - Magnetooptisches aufzeichnungs- oder wiedergabegeraet. - Google Patents

Magnetooptisches aufzeichnungs- oder wiedergabegeraet.

Info

Publication number
DE3882262D1
DE3882262D1 DE8888303024T DE3882262T DE3882262D1 DE 3882262 D1 DE3882262 D1 DE 3882262D1 DE 8888303024 T DE8888303024 T DE 8888303024T DE 3882262 T DE3882262 T DE 3882262T DE 3882262 D1 DE3882262 D1 DE 3882262D1
Authority
DE
Germany
Prior art keywords
magneto
optical recording
playing device
playing
recording
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
DE8888303024T
Other languages
English (en)
Other versions
DE3882262T2 (de
Inventor
Michihiro Mitsubishi Tadokora
Kazuo Mitsubishi Denki K Okada
Hitoshi Mitsubishi Denki Imai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE3882262D1 publication Critical patent/DE3882262D1/de
Application granted granted Critical
Publication of DE3882262T2 publication Critical patent/DE3882262T2/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
    • G11B11/10502—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
    • G11B11/10506—Recording by modulating only the light beam of 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
    • 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
    • G11B11/10517—Overwriting or erasing
    • G11B11/10519—Direct overwriting, i.e. performing erasing and recording using the same transducing means
    • G11B11/10521—Direct overwriting, i.e. performing erasing and recording using the same transducing means using a single light spot
    • 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
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
DE88303024T 1987-04-03 1988-04-05 Magnetooptisches Aufzeichnungs- oder Wiedergabegerät. Expired - Fee Related DE3882262T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62083392A JPS63249953A (ja) 1987-04-03 1987-04-03 光磁気記録再生装置

Publications (2)

Publication Number Publication Date
DE3882262D1 true DE3882262D1 (de) 1993-08-19
DE3882262T2 DE3882262T2 (de) 1993-10-28

Family

ID=13801158

Family Applications (1)

Application Number Title Priority Date Filing Date
DE88303024T Expired - Fee Related DE3882262T2 (de) 1987-04-03 1988-04-05 Magnetooptisches Aufzeichnungs- oder Wiedergabegerät.

Country Status (5)

Country Link
US (1) US5025430A (de)
EP (1) EP0285461B1 (de)
JP (1) JPS63249953A (de)
CA (1) CA1300748C (de)
DE (1) DE3882262T2 (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5367507A (en) * 1985-06-11 1994-11-22 Nikon Corporation Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor
KR920003781B1 (ko) * 1987-11-02 1992-05-14 후지쓰 가부시끼가이샤 광자기 중복 기입법
US5144601A (en) * 1987-11-02 1992-09-01 Fujitsu Limited Magneto-optical overwriting methods using erasing pulses, each of which has a higher frequency and narrower width than that of the overwriting pulses
JPH0227548A (ja) * 1988-07-15 1990-01-30 Nikon Corp 小型化されたｏｗ型光磁気記録装置
US5216663A (en) * 1988-08-24 1993-06-01 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording medium and manufacturing method
JPH0296957A (ja) * 1988-10-03 1990-04-09 Mitsubishi Electric Corp 光磁気記録媒体の消去記録方法
US5233578A (en) * 1988-12-28 1993-08-03 Canon Kabushiki Kaisha Method of recording information on a recording medium having at least two magnetic layers
US5321672A (en) * 1989-04-19 1994-06-14 Hitachi, Ltd. Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains
US5142513A (en) * 1989-04-20 1992-08-25 Victor Company Of Japan, Ltd. Magneto-optical storage medium and magneto-optical overwrite system with magnetic characteristic change by variation of thermal condition for recording information
US5272684A (en) * 1989-08-01 1993-12-21 Mitsubishi Denki Kabushiki Kaisha Information recording method and information recording apparatus for magneto-optic recording information medium
JPH03160646A (ja) * 1989-11-16 1991-07-10 Mitsubishi Electric Corp 光磁気記録装置
JP2707769B2 (ja) * 1989-11-14 1998-02-04 三菱電機株式会社 光磁気記録媒体及びそれを用いた光磁気記録再生装置
US5420728A (en) * 1990-03-24 1995-05-30 Seiko Epson Corporation Magneto-optical recording medium including a plurality of recording layers having different curie temperatures and method of recording and reading
JPH06131722A (ja) * 1992-10-16 1994-05-13 Canon Inc 光磁気記録媒体およびその記録方法
US5381390A (en) * 1993-06-03 1995-01-10 Eastman Kodak Company Directly overwrite information by using two radiation beams onto a single magneto-optical recording
JP2916071B2 (ja) * 1993-11-05 1999-07-05 シャープ株式会社 光磁気記録装置
JPH09198734A (ja) * 1996-01-19 1997-07-31 Matsushita Electric Ind Co Ltd 光磁気ディスク装置
JPH10134372A (ja) * 1996-10-31 1998-05-22 Sony Corp 再生装置および方法
DE19756458A1 (de) * 1997-12-18 1999-06-24 Thomson Brandt Gmbh Magneto-optisches Aufzeichnungs- oder Wiedergabegerät
US6950260B2 (en) 2001-06-04 2005-09-27 Hitachi Global Technologies Netherlands B.V. Thermally assisted magnetic recording system and method of writing using magnetic and thermal gradients

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293621A (en) * 1978-10-12 1981-10-06 Nippon Hoso Kyokai Recording medium
JPS5778653A (en) * 1980-10-29 1982-05-17 Fuji Photo Film Co Ltd Laser recording method
JPS57162137A (en) * 1981-03-28 1982-10-05 Kokusai Denshin Denwa Co Ltd <Kdd> Photomagnetic recording and reproducing system
JPH0670858B2 (ja) * 1983-05-25 1994-09-07 ソニー株式会社 光磁気記録媒体とその製法
JPS6066349A (ja) * 1983-09-22 1985-04-16 Agency Of Ind Science & Technol 光熱磁気記録媒体およびその製造方法
JPH061564B2 (ja) * 1984-02-22 1994-01-05 株式会社ニコン 光磁気記録媒体
JPS6122455A (ja) * 1984-07-11 1986-01-31 Canon Inc 磁気光学記録媒体
DE3584945D1 (de) * 1984-10-30 1992-01-30 Brother Ind Ltd Magnetooptisches speichermedium und geraet zum schreiben auf und lesen von dem medium.
US4794560A (en) * 1985-09-30 1988-12-27 International Business Machines Corporation Eraseable self biasing thermal magneto-optic medium
US4649519A (en) * 1985-09-30 1987-03-10 International Business Machines Corporation Self biasing thermal magneto-optic medium
JPH0695404B2 (ja) * 1985-12-27 1994-11-24 ソニー株式会社 光磁気記録方法
AU600576B2 (en) * 1987-04-24 1990-08-16 Sony Corporation Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film
JPS63291237A (ja) * 1987-05-21 1988-11-29 Mitsubishi Electric Corp 光磁気記録再生用情報担体装置

Also Published As

Publication number Publication date
EP0285461A3 (en) 1990-09-12
EP0285461A2 (de) 1988-10-05
JPS63249953A (ja) 1988-10-17
US5025430A (en) 1991-06-18
DE3882262T2 (de) 1993-10-28
CA1300748C (en) 1992-05-12
EP0285461B1 (de) 1993-07-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee