KR900002266A - 자기광 정보기록 재생장치의 외부자계장치 - Google Patents

자기광 정보기록 재생장치의 외부자계장치 Download PDF

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Publication number
KR900002266A
KR900002266A KR1019890010308A KR890010308A KR900002266A KR 900002266 A KR900002266 A KR 900002266A KR 1019890010308 A KR1019890010308 A KR 1019890010308A KR 890010308 A KR890010308 A KR 890010308A KR 900002266 A KR900002266 A KR 900002266A
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KR
South Korea
Prior art keywords
magnetic field
information recording
external magnetic
generating means
recording medium
Prior art date
Application number
KR1019890010308A
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English (en)
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KR930003132B1 (ko
Inventor
도모유키 미야케
히로유끼 카타야마
쥬니치로 나까야마
다가히로 미야끼
겐지 오따
쇼죠 코바야시
Original Assignee
쓰지 하루오
샤프 가부시끼가이샤
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.)
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Publication of KR900002266A publication Critical patent/KR900002266A/ko
Application granted granted Critical
Publication of KR930003132B1 publication Critical patent/KR930003132B1/ko

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • 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

Abstract

내용 없음

Description

자기광 정보기록 재생장치의 외부자계장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 외부자계장치를 표시한 블럭도.
제2도는 제1도에 표시된 장치에서 옵세트 교류와 기록 신호회로로부터 교류출력의 파형도.
제4도는 옵셋트정도가 변화될 때 특성 변화그래프.

Claims (7)

  1. 기록정보가 자계발생수단에 교류전류를 공급함으로서 조절될 때에 자기광 정보기록 메체에 가해진 외부자계와 기록될 정보에 따라서 변화되는 극성으로 된 장치에 있어서 상기 장치는 상기 교류에서 옵셋트를 발생하는 옵셋트수단을 포함하고 상기 옵셋트는 상기 정보기록매체의 초기자화가 역으로 되므로서 극성의 전류수준을 증가시키도록 한 것을 특징으로 한 자기광 정보기록 재생장치용 외부자계장치.
  2. 제1항에 있어서, 상기 자계 발생수단이 자기헤드(3)의 자기 코일인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
  3. 제1항에 있어서, 상기 극성에 반대극성을 가진 다른 전류수준에 상기 극성을 가진 전류비 수준비가 7:3인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
  4. 기록정보가 자계발생수단에 교류를 공급함으로서 조절될 때에 자기광 정보기록 매체에 가해진 외부자계와 기록될 정보에 따라서 변화되는 극성으로 된 장치에 있어서 상기 장치는 상기 교류에서 옵셋트를 발생하는 옵셋트수단을 포함하고 상기 옵셋트는 상기 장치의 다른 자계 발생수단에 의하여 발생되고 상기 정보기록 매체에 가해진 누설자계를 제거하도록 된 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
  5. 제4항에 있어서, 상기 자계 발생수단은 자기 헤드(3)의 자기 코일인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
  6. 제4항에 있어서, 상기 다른 자계발생 수단은 레이저빔을 상기 정보기록 매체위에 집중시키는 액츄에이터로 되어 있는 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
  7. 제4항에 있어서, 상기 다른 자계발생 수단은 상기 정보기록 매체위에 레이저빔을 추적하는 액츄에이터로 되어 있는 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890010308A 1988-07-20 1989-07-20 자기광 정보기록 재생장치의 외부자계장치 KR930003132B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63180711A JPH065562B2 (ja) 1988-07-20 1988-07-20 光磁気記録再生装置の外部磁界装置
JP63-180711 1988-07-20

Publications (2)

Publication Number Publication Date
KR900002266A true KR900002266A (ko) 1990-02-28
KR930003132B1 KR930003132B1 (ko) 1993-04-22

Family

ID=16087978

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890010308A KR930003132B1 (ko) 1988-07-20 1989-07-20 자기광 정보기록 재생장치의 외부자계장치

Country Status (5)

Country Link
EP (1) EP0352099B1 (ko)
JP (1) JPH065562B2 (ko)
KR (1) KR930003132B1 (ko)
CA (1) CA1325676C (ko)
DE (1) DE68909137T2 (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07118106B2 (ja) * 1990-03-08 1995-12-18 パイオニア株式会社 光磁気記録再生装置
JP2636957B2 (ja) * 1990-08-10 1997-08-06 シャープ株式会社 磁気記録再生装置
JP3098896B2 (ja) * 1992-06-23 2000-10-16 キヤノン株式会社 光磁気記録装置
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139120A (ja) * 1983-01-25 1984-08-09 Seiko Epson Corp 磁気記録装置
US4841407A (en) * 1986-06-16 1989-06-20 Canon Kabushiki Kaisha Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same

Also Published As

Publication number Publication date
JPH065562B2 (ja) 1994-01-19
DE68909137D1 (de) 1993-10-21
KR930003132B1 (ko) 1993-04-22
JPH0231301A (ja) 1990-02-01
EP0352099B1 (en) 1993-09-15
DE68909137T2 (de) 1994-02-03
EP0352099A2 (en) 1990-01-24
CA1325676C (en) 1993-12-28
EP0352099A3 (en) 1991-10-09

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