JPS63187439A - 光磁気記録方式 - Google Patents

光磁気記録方式

Info

Publication number
JPS63187439A
JPS63187439A JP1839087A JP1839087A JPS63187439A JP S63187439 A JPS63187439 A JP S63187439A JP 1839087 A JP1839087 A JP 1839087A JP 1839087 A JP1839087 A JP 1839087A JP S63187439 A JPS63187439 A JP S63187439A
Authority
JP
Japan
Prior art keywords
disk
magneto
intensity
light spot
recording medium
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.)
Pending
Application number
JP1839087A
Other languages
English (en)
Japanese (ja)
Inventor
Takeshi Nakao
武司 仲尾
Masahiro Oshima
尾島　正啓
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1839087A priority Critical patent/JPS63187439A/ja
Priority to US07/145,313 priority patent/US4982389A/en
Priority to DE19883802693 priority patent/DE3802693A1/de
Publication of JPS63187439A publication Critical patent/JPS63187439A/ja
Pending 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
    • G11B11/10595—Control of operating function
    • 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
    • G11B11/10508—Recording by modulating only the magnetic field at 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
    • G11B11/10532—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)
JP1839087A 1987-01-30 1987-01-30 光磁気記録方式 Pending JPS63187439A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1839087A JPS63187439A (ja) 1987-01-30 1987-01-30 光磁気記録方式
US07/145,313 US4982389A (en) 1987-01-30 1988-01-19 Magneto-optical recorder with compensation for variation in applied magnetic field intensity on a recording medium
DE19883802693 DE3802693A1 (de) 1987-01-30 1988-01-29 Magnetooptische aufzeichnungseinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1839087A JPS63187439A (ja) 1987-01-30 1987-01-30 光磁気記録方式

Publications (1)

Publication Number Publication Date
JPS63187439A true JPS63187439A (ja) 1988-08-03

Family

ID=11970384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1839087A Pending JPS63187439A (ja) 1987-01-30 1987-01-30 光磁気記録方式

Country Status (2)

Country Link
JP (1) JPS63187439A (xx)
DE (1) DE3802693A1 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014245A1 (en) * 1991-02-05 1992-08-20 Sony Corporation Method for reproducing signal in optically recording medium
WO1992015093A1 (en) * 1991-02-13 1992-09-03 Sony Corporation Method for reproducing signal in optically recording medium
JPH0562275A (ja) * 1991-06-27 1993-03-12 Mitsubishi Electric Corp 光磁気記録再生装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087532A (en) * 1989-08-01 1992-02-11 Minnesota Mining And Manufacturing Company Direct-overwrite magneto-optic media
JPH03113760A (ja) * 1989-09-22 1991-05-15 Nikon Corp 光磁気ピットポジション記録方法及びそれに使用される記録装置
JP2733127B2 (ja) * 1990-08-07 1998-03-30 シャープ株式会社 光磁気記録装置
JP2786360B2 (ja) * 1991-12-05 1998-08-13 シャープ株式会社 光磁気ディスク

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107112A (ja) * 1975-03-17 1976-09-22 Fuji Photo Film Co Ltd Jikishiitonokirokusaiseihoho oyobi sochi
JPS59215008A (ja) * 1983-05-20 1984-12-04 Canon Inc 光磁気記録方法
US5255057A (en) * 1992-05-29 1993-10-19 Eastman Kodak Company Gray scale monocomponent nonmagnetic development system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014245A1 (en) * 1991-02-05 1992-08-20 Sony Corporation Method for reproducing signal in optically recording medium
US5390162A (en) * 1991-02-05 1995-02-14 Sony Corporation Method for reproducing signals recorded on optical recording medium
WO1992015093A1 (en) * 1991-02-13 1992-09-03 Sony Corporation Method for reproducing signal in optically recording medium
US5335213A (en) * 1991-02-13 1994-08-02 Sony Corporation Positional detection of a magneto-optic recording medium for controlling irradiation of a relief region
JPH0562275A (ja) * 1991-06-27 1993-03-12 Mitsubishi Electric Corp 光磁気記録再生装置

Also Published As

Publication number Publication date
DE3802693C2 (xx) 1990-03-01
DE3802693A1 (de) 1988-08-11

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