DE69015933D1 - Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers. - Google Patents

Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers.

Info

Publication number
DE69015933D1
DE69015933D1 DE69015933T DE69015933T DE69015933D1 DE 69015933 D1 DE69015933 D1 DE 69015933D1 DE 69015933 T DE69015933 T DE 69015933T DE 69015933 T DE69015933 T DE 69015933T DE 69015933 D1 DE69015933 D1 DE 69015933D1
Authority
DE
Germany
Prior art keywords
frequency
reading
information signal
energising current
information
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
DE69015933T
Other languages
English (en)
Inventor
Johannes Hendrikus Mari Spruit
Bernardus Antonius Joha Jacobs
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.)
Koninklijke Philips NV
Original Assignee
Philips Electronics NV
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 Philips Electronics NV filed Critical Philips Electronics NV
Application granted granted Critical
Publication of DE69015933D1 publication Critical patent/DE69015933D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G11B11/1051—Recording by modulating both the magnetic field and the light beam at the transducers
    • G11B11/10513—Recording by modulating both the magnetic field and the light beam at the transducers one of the light beam or the magnetic field being modulated by data and the other by a clock or frequency generator
    • 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
    • G11B11/10528—Shaping of magnetic domains, e.g. form, dimensions
DE69015933T 1989-09-14 1990-09-10 Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers. Expired - Lifetime DE69015933D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8902293A NL8902293A (nl) 1989-09-14 1989-09-14 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.

Publications (1)

Publication Number Publication Date
DE69015933D1 true DE69015933D1 (de) 1995-02-23

Family

ID=19855305

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69015933T Expired - Lifetime DE69015933D1 (de) 1989-09-14 1990-09-10 Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers.

Country Status (10)

Country Link
US (1) US5065377A (de)
EP (1) EP0417858B1 (de)
JP (1) JPH03105749A (de)
KR (1) KR910006929A (de)
CN (1) CN1022956C (de)
AT (1) ATE117119T1 (de)
BR (1) BR9004532A (de)
CZ (1) CZ442790A3 (de)
DE (1) DE69015933D1 (de)
NL (1) NL8902293A (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2839498B2 (ja) * 1988-02-03 1998-12-16 株式会社日立製作所 光ディスク媒体
NL8900362A (nl) * 1989-02-15 1990-09-03 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
US5640379A (en) * 1990-01-30 1997-06-17 Sony Corporation Photomagnetic recording device and photomagnetic reproducing device
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
EP0447265B1 (de) * 1990-03-16 1997-05-21 Canon Kabushiki Kaisha Aufzeichnungs-/Wiedergabegerät für optische Information
JP2838908B2 (ja) * 1990-10-19 1998-12-16 キヤノン株式会社 光磁気記録方法
EP0525192B1 (de) * 1991-02-15 1998-02-04 Sony Corporation Magnetooptisches Wiedergabeverfahren und -vorrichtung
US5345435A (en) * 1991-08-30 1994-09-06 Sony Corporation Optical disc and method for recording on optical disc
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
US5323365A (en) * 1992-05-22 1994-06-21 Alps Electric Co., Ltd. Recording method for opto-magnetic disk
JPH06208739A (ja) * 1993-01-11 1994-07-26 Canon Inc 光磁気ディスク及び該ディスクの着磁方法
US5854775A (en) * 1993-10-04 1998-12-29 Fujitsu Limited Magneto-optic disk recording system having improved duty ratio controller
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
WO2000039930A1 (en) * 1998-12-24 2000-07-06 Koninklijke Philips Electronics N.V. Phase-locked loop and device for reading and/or writing information from/onto a record carrier
JP2000331394A (ja) * 1999-05-14 2000-11-30 Sanyo Electric Co Ltd 光磁気記録方法および光磁気記録装置
US6671235B1 (en) * 2000-03-27 2003-12-30 Ultratech Stepper, Inc. Method of and apparatus for defining disk tracks in magnetic recording media
KR100720779B1 (ko) 2000-03-31 2007-05-22 시게이트 테크놀로지 엘엘씨 데이터 저장 장치에서 필드 유지 전류를 사용하기 위해 제공되는 펄스 기록 전류
WO2002099800A1 (en) 2001-06-01 2002-12-12 Fujitsu Limited Magneto-optic recording medium device
KR100424267B1 (ko) * 2001-06-08 2004-03-24 주식회사 취영루 만두 속 및 그 만두 속 제조방법
EP2030203A1 (de) * 2006-06-15 2009-03-04 Thomson Licensing Disk-authentifizierung durch graustufenbild
CN113252965B (zh) * 2021-07-08 2021-09-21 深圳市海创光学有限公司 探测电路、装置及方法
CN115291149B (zh) * 2022-10-08 2023-02-03 赫智科技(苏州)有限公司 线阵扫描装置及控制方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582570A (en) * 1967-09-05 1971-06-01 Magnovox Co The Themomagnetic transducing system
US3626114A (en) * 1969-03-10 1971-12-07 California Inst Of Techn Thermomagnetic recording and magneto-optic playback system
US3736385A (en) * 1971-06-01 1973-05-29 Du Pont Storage and retrieval of analog information with magnetooptic readout
JPS57113402A (en) * 1981-01-05 1982-07-14 Ricoh Co Ltd Method and device for vertical thermomagnetic recording
EP0180459B1 (de) * 1984-10-30 1991-12-18 Brother Kogyo Kabushiki Kaisha Magnetooptisches Speichermedium und Gerät zum Schreiben auf und Lesen von dem Medium
JPH0721897B2 (ja) * 1986-04-24 1995-03-08 インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション 光磁気データ記録装置
JP2575120B2 (ja) * 1986-07-31 1997-01-22 ソニー株式会社 光磁気記録装置
JPS647327A (en) * 1987-03-25 1989-01-11 Casio Computer Co Ltd Method and apparatus for optical information recording
NL8703011A (nl) * 1987-12-14 1989-07-03 Philips Nv Werkwijze voor het optekenen van informatie op een registratiedrager van het thermo-magnetische type, alsmede een inrichting voor het uitvoeren van de werkwijze.
JP2839498B2 (ja) * 1988-02-03 1998-12-16 株式会社日立製作所 光ディスク媒体

Also Published As

Publication number Publication date
US5065377A (en) 1991-11-12
CZ442790A3 (en) 1994-03-16
EP0417858B1 (de) 1995-01-11
EP0417858A1 (de) 1991-03-20
BR9004532A (pt) 1991-09-10
JPH03105749A (ja) 1991-05-02
KR910006929A (ko) 1991-04-30
CN1022956C (zh) 1993-12-01
ATE117119T1 (de) 1995-01-15
NL8902293A (nl) 1991-04-02
CN1050276A (zh) 1991-03-27

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Legal Events

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8332 No legal effect for de