DE3804733C2 - - Google Patents

Info

Publication number
DE3804733C2
DE3804733C2 DE3804733A DE3804733A DE3804733C2 DE 3804733 C2 DE3804733 C2 DE 3804733C2 DE 3804733 A DE3804733 A DE 3804733A DE 3804733 A DE3804733 A DE 3804733A DE 3804733 C2 DE3804733 C2 DE 3804733C2
Authority
DE
Germany
Prior art keywords
magnetic head
magnetic
recording
data carrier
magnetic field
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
DE3804733A
Other languages
German (de)
English (en)
Other versions
DE3804733A1 (de
Inventor
Takeshi Sagamihara Jp Nakao
Masahiro Ojima
Yoshinori Miyamura
Toyoji Tokio/Tokyo Jp Okuwaki
Youichi Tokorozawa Jp Kawakubo
Yoshinori Ibaraki Jp Takeuchi
Yuzo Tsuchiura Jp Yamaguchi
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
Publication of DE3804733A1 publication Critical patent/DE3804733A1/de
Application granted granted Critical
Publication of DE3804733C2 publication Critical patent/DE3804733C2/de
Granted 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
    • 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
    • G11B11/10502—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
    • 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
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/1058—Flying heads
DE3804733A 1987-03-06 1988-02-15 Magneto-optische speichereinrichtung Granted DE3804733A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62050040A JP2575687B2 (ja) 1987-03-06 1987-03-06 光磁気記憶装置

Publications (2)

Publication Number Publication Date
DE3804733A1 DE3804733A1 (de) 1988-09-15
DE3804733C2 true DE3804733C2 (fr) 1992-08-06

Family

ID=12847886

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3804733A Granted DE3804733A1 (de) 1987-03-06 1988-02-15 Magneto-optische speichereinrichtung

Country Status (3)

Country Link
JP (1) JP2575687B2 (fr)
KR (1) KR910002755B1 (fr)
DE (1) DE3804733A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69031395T2 (de) 1989-02-23 1998-01-15 Fuji Photo Film Co Ltd Harzzusammensetzung und Verpackungsmaterial für lichtempfindliches Material
JPH02226563A (ja) * 1989-02-27 1990-09-10 Hitachi Ltd 高浮上磁気ヘッド
DE69019860T2 (de) * 1989-03-31 1995-12-14 Hitachi Ltd Magnettooptisches Aufzeichnungsgerät.
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
JP2746306B2 (ja) * 1989-05-26 1998-05-06 キヤノン株式会社 光磁気記録再生装置
JPH0340250A (ja) * 1989-07-06 1991-02-21 Matsushita Electric Ind Co Ltd 光磁気ディスクおよび光磁気ディスク装置
US5172364A (en) * 1989-08-01 1992-12-15 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording apparatus with controlled magnetic field generation
JP2574903B2 (ja) * 1989-10-11 1997-01-22 シャープ株式会社 光磁気記録装置
JP2730223B2 (ja) * 1989-11-15 1998-03-25 松下電器産業株式会社 光磁気ディスク
JP2730224B2 (ja) * 1989-11-15 1998-03-25 松下電器産業株式会社 光磁気ディスク
JPH0775042B2 (ja) * 1990-06-13 1995-08-09 シャープ株式会社 光磁気記録再生装置
DE69330485T2 (de) * 1992-10-09 2001-12-13 Canon Kk Magnetkopf für magnetooptische Aufzeichnung und magnetooptisches Aufzeichnungsgerät
JPH07176103A (ja) * 1993-12-20 1995-07-14 Canon Inc 光磁気記録再生システムならびにこれに用いる磁気ヘッド及び光磁気記録媒体
JP2827869B2 (ja) * 1993-12-28 1998-11-25 日本電気株式会社 光磁気記録媒体の再生方法
JP2658866B2 (ja) * 1994-03-04 1997-09-30 株式会社日立製作所 光磁気記憶方法
US6404705B1 (en) 1997-03-14 2002-06-11 Hitachi Maxell, Ltd. Magneto-optical disk apparatus having an adjustment mechanism for setting the position of magnetic heads
KR100708097B1 (ko) * 2000-07-24 2007-04-16 삼성전자주식회사 스윙암 구동방식의 광기록재생장치 및 이광기록재생장치에 적용되는 광디스크

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065585B2 (ja) * 1984-02-15 1994-01-19 株式会社日立製作所 光磁気記憶装置
JPH0648806B2 (ja) * 1985-10-09 1994-06-22 松下電器産業株式会社 信号多重装置

Also Published As

Publication number Publication date
KR880011753A (ko) 1988-10-31
JPS63217548A (ja) 1988-09-09
DE3804733A1 (de) 1988-09-15
KR910002755B1 (ko) 1991-05-04
JP2575687B2 (ja) 1997-01-29

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee