KR910001692A - 자석-광학 레코더 - Google Patents

자석-광학 레코더 Download PDF

Info

Publication number
KR910001692A
KR910001692A KR1019890007685A KR890007685A KR910001692A KR 910001692 A KR910001692 A KR 910001692A KR 1019890007685 A KR1019890007685 A KR 1019890007685A KR 890007685 A KR890007685 A KR 890007685A KR 910001692 A KR910001692 A KR 910001692A
Authority
KR
South Korea
Prior art keywords
coil
optical recorder
magnet
input
optical
Prior art date
Application number
KR1019890007685A
Other languages
English (en)
Inventor
마리아 반 니오이브란트 아콥
페트루스 요세푸스 헴스케르크 야코부스
레오폴두스 박스 요하네스
요지아스 얀세 얀
Original Assignee
필립스 앤드 듀 퐁 옵티컬 캄파니
이반 밀러 레르너
엔. 브이. 필립스 글로아이람펜파브리켄
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 필립스 앤드 듀 퐁 옵티컬 캄파니, 이반 밀러 레르너, 엔. 브이. 필립스 글로아이람펜파브리켄 filed Critical 필립스 앤드 듀 퐁 옵티컬 캄파니
Publication of KR910001692A publication Critical patent/KR910001692A/ko

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • 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

Abstract

내용 없음

Description

자석-광학 레코더
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 자석 광학 레코더 도시도,
제2도 및 3도는 본 발명에 따른 자석 광학 레코더의 제1 및 제2변형의 도시도,
제5도는 본 발명의 실시예에서 사용하기 위한 전류 변조기 사시도.

Claims (9)

  1. 방사 비임을 자기 광학 기록 캐리어의 열자기층으로 유도하며, 상기 열 자기층상에 촛점을 형성하기 위해 방사 비임을 접속시키기 위한 접속 장치와, 상기 층상의 촛점 영역내에 촛점을 유지시키며 광학시스템에 대해서 열 자기층의 위치를 나타내는 교정신호를 발생하도록 구성되는 서브 시스템과, 자기 기록헤드의 코일을 통하는 전류를 변조하기 위한 전류변조기를 구비하는 광학 시스템을 포함하는 자석-광학 레코더에 있어서, 상기 자석-광학 레코더가 교정 신호에 응답하여, 열 자기층(4)내 상기 자계 강도가 상기 층(4)의 위치에 무관하게 되는 방식으로 코일에 의해 발생되는 자계에 영향을 미치는 파라메타를 변화시키기 위한 보상 장치(11,20)을 구비하는 것을 특징으로 하는 자석-광학 레코더.
  2. 제1항에 있어서, 상기 파라메타는 코일(15)의 위치이며, 상기 보상장치는, 코일이 촛점의 변위를 따르드시, 축에 평행한 코일을 이동시키기 위한 제1의 변형 장치(20)인 것을 특징으로 하는 자석-광학 레코더.
  3. 제2항에 있어서, 서보 시스템은 접속 장치(9)를 축방향으로 이동시키기 위한 제2변형 장치(10)를 구비하며, 접속장치(9) 및 코일(15)은 캐리어(4)의 반대쪽에 장치되며, 제11변형 장치(20)와 제2변형 장치(10)는 서로 반대로 장치되며, 서보 시스템은 교정 신호를 상기 변형 장치의 각 입력에 인가시키도록 적응되는 것을 특징으로 하는 자석-광학 레코더.
  4. 제3항에 있어서, 제1 및 제2변형 장치(10, 20)는 자기형 및 그와 동일한 구성을 갖으며, 서로 다른 위상으로 구동되드시 서보 시스템으로 결합되는 것을 특징으로 하는 자석-광학 레코더.
  5. 제1항에 있어서, 상기 파라메타는 코일(5)을 통과하는 전류이며 보상 장치는 코일을 통하는 전류의 선정된 함수에 따라 작동하도록 구성된 제어 장치(11)인 것을 특징으로 하는 자석-광학 레코더.
  6. 제5항에 있어서, 상기 선정된 함수는 상기 필드가 거리의 함수로서 코일축을 따라 변동하는 것에 따른 특성의 근사치인 것을 특징으로 하는 자석-광학 레코더.
  7. 제5항 또는 6항에 있어서, 상기 제어 장치는 직류 전압 소스로부터의 전압을 수신하도록 장치된 주 입력과, 교정 신호를 수신하도록 장치된 변조 입력과, 전류 변조기(M)의 전원 입력에 접속된 출력을 갖는 펄스폭 변조기(40)인 것을 특징으로 하는 자석-광학 레코더.
  8. 제7항에 있어서, 입력에서 펄스폭 변조기는 교정 신호를 여파시키며, 디스크(1)의 이탈을 표시하지 않는 교정 신호 성분을 거절하기 위해 선택되는 차단 주파수를 갖는 저역 통과 필터(41)를 구비하는 것을 특징으로 하는 자석-광학 레코더.
  9. 전항중 어느 한 항에 있어서, 전류 변조기는 제어 신호를 수신하기 위한 입력과, 2진 제어 신호의 논리 상태의 함수로서 제1 및 제2전위에서 교대로 코일(15)의 적어도 하나의 입력(57, 59)을 가져오기 위한 스위칭 장치(51, 55)를 구비하며, 코일(15)은 평행하는 공진 회로(15, 42)에 배치되며, 상기 스위칭 장치는, 코일(15)의 상기 입력이 제1 및 제2전위로부터 결합된 후에, 공진 회로(15, 42)의 공진 주기의 반에 대응하는 시간 간격 동안 다른 전위로 상기 입력을 결합시키는 것을 금지하기 위한 장치(52, 56)를 구비하는 것을 특징으로 하는 자석-광학 레코더.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890007685A 1988-06-07 1989-06-05 자석-광학 레코더 KR910001692A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807544 1988-06-07
FR8807544A FR2632438A1 (fr) 1988-06-07 1988-06-07 Enregistreur magneto-optique a champ magnetique module

Publications (1)

Publication Number Publication Date
KR910001692A true KR910001692A (ko) 1991-01-31

Family

ID=9367014

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890007685A KR910001692A (ko) 1988-06-07 1989-06-05 자석-광학 레코더

Country Status (9)

Country Link
US (1) US5163032A (ko)
EP (1) EP0345877B1 (ko)
JP (1) JPH0264946A (ko)
KR (1) KR910001692A (ko)
CN (1) CN1039317A (ko)
AT (1) ATE111254T1 (ko)
AU (1) AU3604789A (ko)
DE (1) DE68917996T2 (ko)
FR (1) FR2632438A1 (ko)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
JP3188339B2 (ja) * 1992-03-06 2001-07-16 キヤノン株式会社 磁気ヘッド駆動装置および光磁気記録装置
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
GB2335785B (en) 1998-03-24 2002-09-18 Quantum Corp Multi-channel magnetic tape system having optical tracking servo
US7029726B1 (en) 1999-07-27 2006-04-18 Quantum Corporation Method for forming a servo pattern on a magnetic tape
US7153366B1 (en) 1998-03-24 2006-12-26 Quantum Corporation Systems and method for forming a servo pattern on a magnetic tape
EP1205912A4 (en) 1999-02-16 2002-08-21 Quantum Corp METHOD FOR WRITING SERVO SIGNALS ON MAGNETIC TAPE
WO2000049605A1 (fr) 1999-02-17 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
US6961200B2 (en) 1999-07-27 2005-11-01 Quantum Corporation Optical servo track identification on tape storage media
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6940676B1 (en) 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
US6940681B2 (en) 2001-08-20 2005-09-06 Quantum Corporation Optical to magnetic alignment in magnetic tape system
US7023650B2 (en) 2001-11-07 2006-04-04 Quantum Corporation Optical sensor to recording head alignment
US6980390B2 (en) 2003-02-05 2005-12-27 Quantum Corporation Magnetic media with embedded optical servo tracks
US7187515B2 (en) 2003-02-05 2007-03-06 Quantum Corporation Method and system for tracking magnetic media with embedded optical servo tracks

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7904724A (nl) * 1979-06-18 1980-12-22 Philips Nv Optische aftastinrichting met fokusseerstelsel.
JPS57133503A (en) * 1981-02-10 1982-08-18 Sharp Corp Optical and magnetic recorder and reproducer
JPS58179088A (ja) * 1982-04-15 1983-10-20 Pioneer Electronic Corp 情報記録装置
JPS58179904A (ja) * 1982-04-15 1983-10-21 Pioneer Electronic Corp 情報記録方式
JPS60630A (ja) * 1983-06-16 1985-01-05 Matsushita Electric Ind Co Ltd 光学式記録再生装置
JPH0719403B2 (ja) * 1984-04-02 1995-03-06 日本電気株式会社 光磁気記録再生消去装置
JPH0619863B2 (ja) * 1984-06-13 1994-03-16 株式会社日立製作所 光磁気情報記憶方法及び装置
JP2533847B2 (ja) * 1985-10-17 1996-09-11 オリンパス光学工業株式会社 光磁気記録再生装置
JPS63177304A (ja) * 1987-01-16 1988-07-21 Sanyo Electric Co Ltd 光磁気情報記録装置の外部磁界印加装置

Also Published As

Publication number Publication date
US5163032A (en) 1992-11-10
ATE111254T1 (de) 1994-09-15
DE68917996D1 (de) 1994-10-13
EP0345877A1 (fr) 1989-12-13
DE68917996T2 (de) 1995-04-20
JPH0264946A (ja) 1990-03-05
AU3604789A (en) 1990-08-16
CN1039317A (zh) 1990-01-31
FR2632438A1 (fr) 1989-12-08
EP0345877B1 (fr) 1994-09-07

Similar Documents

Publication Publication Date Title
KR910001692A (ko) 자석-광학 레코더
US4425023A (en) Beam spot scanning device
US5016233A (en) Optical scanning arrangement for maintaining constant the light output of a laser beam or the laser current
US4819242A (en) Semiconductor laser driver circuit
EP0387052B1 (en) Magneto-optical recording apparatus having means for delaying an input signal for preventing bit shift
KR870010506A (ko) 광 자기 기록 장치
SU1757475A3 (ru) Устройство дл модул ции магнитного потока при термомагнитной записи лучом лазера
US5313444A (en) External magnetic field generation apparatus capable of light intensity modulation and magnetic field modulation
EP0045117B1 (en) Apparatus and method for writing a signal information track on a disc
EP0519729A2 (en) Magnetic head driving circuit
US4613964A (en) Optical information processing method and apparatus therefor
JPH04500285A (ja) 磁気光学メモリに記録するために磁界を変調するための制御回路
US4212513A (en) Pulse transformer technique for optical switch
US5278809A (en) Photomagnetic recording apparatus recording with alternating magnetic field and D.C. magnetic field
EP0565068A2 (en) Mirror driving apparatus for optical disk drive
US4982389A (en) Magneto-optical recorder with compensation for variation in applied magnetic field intensity on a recording medium
GB2181879A (en) Magneto-optical information recording apparatus
EP0522543B1 (en) A magnetic field modulation magnet-optical recording apparatus in which an FM modulator and a magnetic head driving circuit are used in common
NL9001725A (nl) Werkwijze en inrichting voor het registreren van informatie op een magneto-optisch informatieregistratiemedium.
US5272684A (en) Information recording method and information recording apparatus for magneto-optic recording information medium
US4914643A (en) Overwriting photomagnetic recording apparatus having single light source and fixed-field generator
KR910010433A (ko) 자기-광학 레코드 캐리어의 기록 및 판독 방법 및 장치
US5459707A (en) Read/write CD ROM system using an electro-optic modulator to crosstalk
US5303212A (en) Low voltage, high current magnetic transducer drive system for digital recording
KR840005586A (ko) 정보 판독장치의 포우커스 서어보장치

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application