KR920702529A - 자기 광학 기록 및 재생장치 - Google Patents

자기 광학 기록 및 재생장치

Info

Publication number
KR920702529A
KR920702529A KR1019920700075A KR920700075A KR920702529A KR 920702529 A KR920702529 A KR 920702529A KR 1019920700075 A KR1019920700075 A KR 1019920700075A KR 920700075 A KR920700075 A KR 920700075A KR 920702529 A KR920702529 A KR 920702529A
Authority
KR
South Korea
Prior art keywords
laser
magneto
optical recording
pits
output
Prior art date
Application number
KR1019920700075A
Other languages
English (en)
Other versions
KR0168456B1 (ko
Inventor
야수아키 모리모토
프리트헬름 추커
Original Assignee
로베르트 아인젤
도이체 톰손-브란트 게엠베하
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 로베르트 아인젤, 도이체 톰손-브란트 게엠베하 filed Critical 로베르트 아인젤
Publication of KR920702529A publication Critical patent/KR920702529A/ko
Application granted granted Critical
Publication of KR0168456B1 publication Critical patent/KR0168456B1/ko

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
    • 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
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the 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
    • G11B11/10595—Control of operating function
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers

Abstract

내용 없음

Description

자기 광학 기록 및 재생장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예를 나타내는 도면이며, 제2도와 3도는 푸시풀 신호를 나타내는 도면이다.

Claims (5)

  1. 데이타가 피트에 의해서 뿐만 아니라 자기 광학 층에도 기억되어 있는 기록 매체를 위한 자기 광학 기록 및/또는 재생 장치에 있어서, 파장이 피트의 깊이의 약 4배되는 제1레이저가 피트를 주사하는데 이용되며, 파장이 피트의 깊이의 약 2배되는 제2레이저가 자기 광학 층에 기억된 데이타를 읽는데 이용되는 것을 특징으로 하는 자기 광학 기록 및/또는 재생 장치.
  2. 제1항에 있어서, 제2레이저(10)가 조절 가능한 것을 특징으로 하는 자기 광학 기록 및/또는 재생 장치.
  3. 제2항에 있어서, 제2레이저(10)로부터 발사된 광은 기록 매체로 부터 2부분 광 검출기(13)로 반사되며 2부분과 검출기(13)의 2개의 출력신호(13a, 13b)의 차로부터 푸시풀 신호(PS)가 발생되며, 이 푸시풀 신호로부터 조절 가능한 레이저(10)를 위한 조절 신호가 발생됨으로써 제2레이저(10)가 자동적으로 정확한 파장에 조절되는 것을 특징으로 하는 자기 광학 기록 및/또는 재생 장치.
  4. 제3항에 있어서, 푸시풀 신호(PS)의 위상 위치는 제1레이저(1)로 부터 발생된 트랙 에러 신호(TE)의 위상 위치와 비교되며, 제2레이저(10)의 파장(λ2)를 조절하기 위한 조절신호는 상기 위상 비교로부터 얻어지는 것을 특징으로 하는 자기 광학 기록 및/또는 재생장치.
  5. 제 4항에 있어서, 2부분 광 검출기(13)의 출력은 제1차동 증폭기(22)의 입력들과 연결되어 있고, 이 차동 증폭기의 출력은 곱셈기(18)의 한 입력과 연결되며, 공지의 방법으로 2개의 광 검출기(E, F)와 제2차동 증폭기(23)를 이용하여 발생된트랙 에러 신호(TE)가 곱셈기(18)의 다른 입력에 인가되고, 곱셈기(18)의 출력은 저역 필터(19)를 경유하여 서보 증폭기(20)의 입력과 연결되며, 이 서보 증폭기의 출력은 조절 가능한 레이저(10)의 조절 입력과 연결되어 있는 것을 특징으로 하는 자기 광학 기록 및/또는 재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920700075A 1989-07-14 1990-06-29 자기광학장치 KR0168456B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3923328A DE3923328A1 (de) 1989-07-14 1989-07-14 Magneto-optisches aufnahme- und/oder wiedergabegeraet
DEP39233286 1989-07-14
DEP3923328.6 1989-07-14
PCT/EP1990/001038 WO1991001553A1 (de) 1989-07-14 1990-06-29 Magneto-optisches aufnahme- und/oder wiedergabegerät

Publications (2)

Publication Number Publication Date
KR920702529A true KR920702529A (ko) 1992-09-04
KR0168456B1 KR0168456B1 (ko) 1999-03-20

Family

ID=6385047

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920700075A KR0168456B1 (ko) 1989-07-14 1990-06-29 자기광학장치

Country Status (15)

Country Link
US (1) US5375109A (ko)
EP (1) EP0485448B1 (ko)
JP (1) JP3112087B2 (ko)
KR (1) KR0168456B1 (ko)
CN (1) CN1021492C (ko)
AT (1) ATE107790T1 (ko)
AU (1) AU6060090A (ko)
DD (1) DD296774A5 (ko)
DE (2) DE3923328A1 (ko)
ES (1) ES2056473T3 (ko)
FI (1) FI920143A0 (ko)
HK (1) HK108095A (ko)
HU (1) HUT60561A (ko)
MY (1) MY106015A (ko)
WO (1) WO1991001553A1 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
JP3095871B2 (ja) * 1992-04-09 2000-10-10 パイオニア株式会社 光学式ディスクおよびその情報再生方法
JPH0668599U (ja) * 1993-03-12 1994-09-27 株式会社イナックス トイレ設備
EP0747893B1 (en) * 1995-06-05 2003-05-02 Nec Corporation Optical head apparatus for different types of disks
US5756038A (en) * 1996-04-01 1998-05-26 Seda Specialty Packaging Corp. Process of reshaping decorated plastic materials

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6113458A (ja) * 1984-06-29 1986-01-21 Hitachi Ltd 光学的情報記録媒体およびカツテイング装置
JPS6142738A (ja) * 1984-08-06 1986-03-01 Hikari Yokoekawa 光学式記録再生システム
JPS6151631A (ja) * 1984-08-20 1986-03-14 Sharp Corp 光磁気メモリ素子
NL8500153A (nl) * 1985-01-22 1986-08-18 Philips Nv Registratiedragerlichaam voorzien van een reliefstruktuur van optisch detekteerbare servospoorgedeelten en sektoradressen en inrichting voor het aanbrengen van deze struktuur.
JPS61206436A (ja) * 1985-03-08 1986-09-12 旭光学工業株式会社 レ−ザ−メス装置
JPS61206947A (ja) * 1985-03-11 1986-09-13 Nippon Kogaku Kk <Nikon> 同時消録型光磁気記録及び記録再生装置のピツクアツプ
DE3732874A1 (de) * 1987-09-30 1989-04-20 Thomson Brandt Gmbh Optische abtastvorrichtung
NL8800133A (nl) * 1988-01-21 1989-08-16 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
JP2870127B2 (ja) * 1990-05-31 1999-03-10 ソニー株式会社 トラッキング制御方法

Also Published As

Publication number Publication date
FI920143A0 (fi) 1992-01-13
ATE107790T1 (de) 1994-07-15
DE3923328A1 (de) 1991-01-24
CN1021492C (zh) 1993-06-30
HU9200017D0 (en) 1992-04-28
JPH04506722A (ja) 1992-11-19
DE59006249D1 (de) 1994-07-28
EP0485448B1 (de) 1994-06-22
HUT60561A (en) 1992-09-28
KR0168456B1 (ko) 1999-03-20
ES2056473T3 (es) 1994-10-01
CN1048762A (zh) 1991-01-23
HK108095A (en) 1995-07-14
US5375109A (en) 1994-12-20
AU6060090A (en) 1991-02-22
MY106015A (en) 1995-02-28
WO1991001553A1 (de) 1991-02-07
JP3112087B2 (ja) 2000-11-27
DD296774A5 (de) 1991-12-12
EP0485448A1 (de) 1992-05-20

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