SG44721A1 - Method of and apparatus for writing and reading a mageto-optical record carrier - Google Patents

Method of and apparatus for writing and reading a mageto-optical record carrier

Info

Publication number
SG44721A1
SG44721A1 SG1996006260A SG1996006260A SG44721A1 SG 44721 A1 SG44721 A1 SG 44721A1 SG 1996006260 A SG1996006260 A SG 1996006260A SG 1996006260 A SG1996006260 A SG 1996006260A SG 44721 A1 SG44721 A1 SG 44721A1
Authority
SG
Singapore
Prior art keywords
writing
reading
record carrier
optical record
mageto
Prior art date
Application number
SG1996006260A
Other languages
English (en)
Inventor
Bernardus Antonius Joha Jacobs
Johannes Hendrikus Mari Spruit
Van Cornelis Marinus Joh Uijen
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
Publication of SG44721A1 publication Critical patent/SG44721A1/en

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
    • 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
    • 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
    • G11B11/10515—Reproducing
    • 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
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
SG1996006260A 1989-02-15 1990-02-09 Method of and apparatus for writing and reading a mageto-optical record carrier SG44721A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8900362A NL8900362A (nl) 1989-02-15 1989-02-15 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.

Publications (1)

Publication Number Publication Date
SG44721A1 true SG44721A1 (en) 1997-12-19

Family

ID=19854133

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996006260A SG44721A1 (en) 1989-02-15 1990-02-09 Method of and apparatus for writing and reading a mageto-optical record carrier

Country Status (9)

Country Link
US (2) US5442597A (de)
EP (1) EP0383386B1 (de)
JP (1) JP3201759B2 (de)
KR (1) KR0152530B1 (de)
CN (1) CN1022651C (de)
AT (1) ATE137600T1 (de)
DE (1) DE69026734T2 (de)
NL (1) NL8900362A (de)
SG (1) SG44721A1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900362A (nl) * 1989-02-15 1990-09-03 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
DE69029048T2 (de) * 1989-04-19 1997-03-20 Hitachi Ltd Magnetooptische Aufzeichnungs- und Wiedergabeverfahren, magnetooptische Speichervorrichtung
JP2636957B2 (ja) * 1990-08-10 1997-08-06 シャープ株式会社 磁気記録再生装置
JP2838908B2 (ja) * 1990-10-19 1998-12-16 キヤノン株式会社 光磁気記録方法
JP2738785B2 (ja) * 1991-06-27 1998-04-08 三菱電機株式会社 光磁気記録再生装置
CA2060547C (en) * 1991-02-08 2002-04-23 Masumi Ohta System and method of reproducing signals recorded on a magneto-optic recording medium
EP0565751A1 (de) * 1992-04-14 1993-10-20 Pioneer Electronic Corporation Optisches Aufzeichnungsverfahren und Gerät dafür
EP0618572B1 (de) 1993-04-02 2002-07-03 Canon Kabushiki Kaisha Magneto-optisches Aufzeichnungsmedium auf dem es moglich ist, Informationen hoher Zeichendichte aufzuzeichnen und Verfahren zur Wiedergabe der aufgezeichneten Informationen
WO1995030163A1 (en) * 1994-05-02 1995-11-09 Philips Electronics N.V. Optical transmissive component with anti-reflection gratings
US5530688A (en) * 1994-10-31 1996-06-25 International Business Machines Corporation Optical disk recording device using two modulated laser beams for recording information data
JP3422869B2 (ja) * 1995-01-27 2003-06-30 新日本石油株式会社 Ｈｃｆｃ冷媒及びｈｆｃ冷媒に共用可能な冷凍機油組成物
CN1037781C (zh) * 1995-06-22 1998-03-18 中国石油化工总公司 一种抗磨添加剂及其制备方法
AU6369496A (en) 1995-07-13 1997-02-10 Hitachi Maxell, Ltd. Magneto-optical recording medium and method for recording and reproduction thereon
CN1037520C (zh) * 1996-04-23 1998-02-25 北京石油化工学院设计所 一种润滑油的添加剂
CN1058517C (zh) * 1997-06-23 2000-11-15 中国石化兰州炼油化工总厂 通用齿轮油复合剂的组合物
JP2000099980A (ja) * 1998-09-17 2000-04-07 Toshiba Corp 光ディスク記録再生装置に使用される光学装置
CN1331127C (zh) * 2002-03-29 2007-08-08 皇家飞利浦电子股份有限公司 将信息写入到记录载体上的装置和方法
WO2004049319A1 (en) * 2002-11-27 2004-06-10 Nokia Corporation Read/write device for optical memory and method therefore
TWI427631B (zh) * 2006-10-10 2014-02-21 Thomson Licensing 記錄層具有凹溝結構之光學記錄媒體，在其上記錄用之光學拾波器及記錄裝置和方法

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US3869193A (en) * 1973-09-18 1975-03-04 Honeywell Inc Optical memory with improved signal-to-noise ratio
US4176377A (en) * 1977-11-10 1979-11-27 Eastman Kodak Company Video disc configuration
DE3016533A1 (de) * 1980-04-29 1981-11-05 Linde Ag, 6200 Wiesbaden Schieberventil
JPS57113402A (en) * 1981-01-05 1982-07-14 Ricoh Co Ltd Method and device for vertical thermomagnetic recording
JPS5826336A (ja) * 1981-08-06 1983-02-16 Pioneer Electronic Corp 光磁気記録方式の記録再生装置
US4544443A (en) * 1983-05-13 1985-10-01 Shap Kabushiki Kaisha Method for manufacturing an optical memory element
JPS60236137A (ja) * 1984-05-08 1985-11-22 Nippon Kogaku Kk <Nikon> 同時消録型光磁気記録方式並びにそれに使用する記録装置及び記録媒体
US4694447A (en) * 1984-07-12 1987-09-15 International Business Machines Corp. Optical signal recorders employing two lasers and methods therefor
US4922454A (en) * 1984-10-30 1990-05-01 Brother Kogyo Kabushiki Kaisha Magneto-optical memory medium and apparatus for writing and reading information on and from the 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
US4730293A (en) * 1986-09-15 1988-03-08 Drexler Technology Corporation Dual beam optical data system
JPS63225945A (ja) * 1987-03-16 1988-09-20 Hitachi Ltd 光磁気デイスク
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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.
NL8902293A (nl) * 1989-09-14 1991-04-02 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.

Also Published As

Publication number Publication date
US5553038A (en) 1996-09-03
DE69026734T2 (de) 1996-11-07
KR900013475A (ko) 1990-09-05
NL8900362A (nl) 1990-09-03
EP0383386A1 (de) 1990-08-22
US5442597A (en) 1995-08-15
CN1022651C (zh) 1993-11-03
ATE137600T1 (de) 1996-05-15
DE69026734D1 (de) 1996-06-05
CN1044997A (zh) 1990-08-29
KR0152530B1 (ko) 1998-10-15
JPH02246035A (ja) 1990-10-01
JP3201759B2 (ja) 2001-08-27
EP0383386B1 (de) 1996-05-01

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