NL8902293A - Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager. - Google Patents

Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager. Download PDF

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Publication number
NL8902293A
NL8902293A NL8902293A NL8902293A NL8902293A NL 8902293 A NL8902293 A NL 8902293A NL 8902293 A NL8902293 A NL 8902293A NL 8902293 A NL8902293 A NL 8902293A NL 8902293 A NL8902293 A NL 8902293A
Authority
NL
Netherlands
Prior art keywords
signal
information
radiation
frequency
excitation current
Prior art date
Application number
NL8902293A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Priority to NL8902293A priority Critical patent/NL8902293A/nl
Priority to US07/453,639 priority patent/US5065377A/en
Priority to KR1019900013459A priority patent/KR910006929A/ko
Priority to JP2238802A priority patent/JPH03105749A/ja
Priority to EP90202402A priority patent/EP0417858B1/de
Priority to DE69015933T priority patent/DE69015933D1/de
Priority to AT90202402T priority patent/ATE117119T1/de
Priority to CN90107706A priority patent/CN1022956C/zh
Priority to BR909004532A priority patent/BR9004532A/pt
Priority to CS904427A priority patent/CZ442790A3/cs
Publication of NL8902293A publication Critical patent/NL8902293A/nl

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
NL8902293A 1989-09-14 1989-09-14 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager. NL8902293A (nl)

Priority Applications (10)

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.
US07/453,639 US5065377A (en) 1989-09-14 1989-12-20 Method of and apparatus for writing and reading a magneto-optical record carrier with an information density greater than that corresponding to the size of the scanning spot
KR1019900013459A KR910006929A (ko) 1989-09-14 1990-08-30 광자기 기록매체(record carrier)를 기록 및 재생하는 방법 및 장치
JP2238802A JPH03105749A (ja) 1989-09-14 1990-09-07 磁気光学担体の書き込み及び読み出し方法並びにその装置
EP90202402A EP0417858B1 (de) 1989-09-14 1990-09-10 Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers
DE69015933T DE69015933D1 (de) 1989-09-14 1990-09-10 Verfahren und Anordnung zum Aufzeichnen und Lesen eines magnetooptischen Aufzeichnungsträgers.
AT90202402T ATE117119T1 (de) 1989-09-14 1990-09-10 Verfahren und anordnung zum aufzeichnen und lesen eines magnetooptischen aufzeichnungsträgers.
CN90107706A CN1022956C (zh) 1989-09-14 1990-09-11 写入和读出磁光记录载体的方法和装置
BR909004532A BR9004532A (pt) 1989-09-14 1990-09-11 Processo de gravacao de leitura por via optica de informacoes e aparelho para sua realizacao
CS904427A CZ442790A3 (en) 1989-09-14 1990-09-11 Process and apparatus for optical record and reading of data

Applications Claiming Priority (2)

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.
NL8902293 1989-09-14

Publications (1)

Publication Number Publication Date
NL8902293A true NL8902293A (nl) 1991-04-02

Family

ID=19855305

Family Applications (1)

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

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 (23)

* 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
DE69126160T2 (de) * 1990-03-16 1997-10-09 Canon Kk Aufzeichnungs-/Wiedergabegerät für optische Information
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
JP2838908B2 (ja) * 1990-10-19 1998-12-16 キヤノン株式会社 光磁気記録方法
DE69128884T2 (de) * 1991-02-15 1998-09-03 Sony Corp 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
GB2376791B (en) 2000-03-31 2004-05-12 Seagate Technology Llc Pulsed write current adapted for use with a field maintenance current in a data storage device
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
JP4834769B2 (ja) * 2006-06-15 2011-12-14 トムソン ライセンシング 変調規則の変化により得られるデータ領域内の濃淡画像によるディスクの認証
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
KR102679110B1 (ko) * 2023-08-25 2024-06-27 자연그린 주식회사 단무지 제조방법

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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
DE3584945D1 (de) * 1984-10-30 1992-01-30 Brother Ind Ltd Magnetooptisches speichermedium und geraet 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
CN1050276A (zh) 1991-03-27
EP0417858B1 (de) 1995-01-11
CZ442790A3 (en) 1994-03-16
DE69015933D1 (de) 1995-02-23
BR9004532A (pt) 1991-09-10
EP0417858A1 (de) 1991-03-20
KR910006929A (ko) 1991-04-30
US5065377A (en) 1991-11-12
JPH03105749A (ja) 1991-05-02
ATE117119T1 (de) 1995-01-15
CN1022956C (zh) 1993-12-01

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