DE69029048D1 - Magnetooptische Aufzeichnungs- und Wiedergabeverfahren, magnetooptische Speichervorrichtung - Google Patents

Magnetooptische Aufzeichnungs- und Wiedergabeverfahren, magnetooptische Speichervorrichtung

Info

Publication number
DE69029048D1
DE69029048D1 DE69029048T DE69029048T DE69029048D1 DE 69029048 D1 DE69029048 D1 DE 69029048D1 DE 69029048 T DE69029048 T DE 69029048T DE 69029048 T DE69029048 T DE 69029048T DE 69029048 D1 DE69029048 D1 DE 69029048D1
Authority
DE
Germany
Prior art keywords
magneto
storage device
optical
reproducing methods
optical 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
DE69029048T
Other languages
English (en)
Other versions
DE69029048T2 (de
Inventor
Toshimitsu Kaku
Shigeru Nakamura
Masahiko Takahashi
Toshio Niihara
Harukazu Miyamoto
Norio Ohta
Takeshi Nakao
Hirofumi Sukeda
Masahiro Ojima
Takashi Toyooka
Tsuneo Suganuma
Fumiyoshi Kirino
Yoshinori Miyamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 JP9731289A external-priority patent/JPH02278544A/ja
Priority claimed from JP1204658A external-priority patent/JP2875290B2/ja
Priority claimed from JP24197489A external-priority patent/JPH03105744A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of DE69029048D1 publication Critical patent/DE69029048D1/de
Application granted granted Critical
Publication of DE69029048T2 publication Critical patent/DE69029048T2/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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • 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
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10545—Heads for reproducing using optical beam of radiation interacting directly with the magnetisation on the record carrier
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
DE69029048T 1989-04-19 1990-04-19 Magnetooptische Aufzeichnungs- und Wiedergabeverfahren, magnetooptische Speichervorrichtung Expired - Fee Related DE69029048T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9731289A JPH02278544A (ja) 1989-04-19 1989-04-19 光磁気記録方法
JP1204658A JP2875290B2 (ja) 1989-08-09 1989-08-09 光学的記録再生方法
JP24197489A JPH03105744A (ja) 1989-09-20 1989-09-20 情報記録媒体の構造

Publications (2)

Publication Number Publication Date
DE69029048D1 true DE69029048D1 (de) 1996-12-12
DE69029048T2 DE69029048T2 (de) 1997-03-20

Family

ID=27308379

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69029048T Expired - Fee Related DE69029048T2 (de) 1989-04-19 1990-04-19 Magnetooptische Aufzeichnungs- und Wiedergabeverfahren, magnetooptische Speichervorrichtung

Country Status (2)

Country Link
EP (1) EP0393652B1 (de)
DE (1) DE69029048T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH04255947A (ja) * 1991-02-08 1992-09-10 Sony Corp 光磁気記録方法と光磁気記録再生装置
EP1406256A4 (de) * 2001-06-01 2007-01-03 Fujitsu Ltd Einrichtung für magnetooptisches aufzeichnungsmedium
WO2004019051A1 (ja) * 2002-08-23 2004-03-04 National Institute Of Advanced Industrial Science And Technology 磁気センサー

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117436A (ja) * 1983-11-29 1985-06-24 Sharp Corp 磁気光学記憶素子
EP0310680A4 (en) * 1987-04-17 1990-10-03 Mitsui Petrochemical Industries, Ltd. Photomagnetic recording membrane
EP0309200B1 (de) * 1987-09-22 1993-12-01 Hitachi Maxell Ltd. Optisches Informationsaufzeichnungs-/wiedergabegerät
NL8900362A (nl) * 1989-02-15 1990-09-03 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.

Also Published As

Publication number Publication date
EP0393652A2 (de) 1990-10-24
DE69029048T2 (de) 1997-03-20
EP0393652B1 (de) 1996-11-06
EP0393652A3 (de) 1992-08-12

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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