NL8901345A - Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager. - Google Patents

Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager. Download PDF

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Publication number
NL8901345A
NL8901345A NL8901345A NL8901345A NL8901345A NL 8901345 A NL8901345 A NL 8901345A NL 8901345 A NL8901345 A NL 8901345A NL 8901345 A NL8901345 A NL 8901345A NL 8901345 A NL8901345 A NL 8901345A
Authority
NL
Netherlands
Prior art keywords
intensity
recording
test signal
track
signal
Prior art date
Application number
NL8901345A
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 NL8901345A priority Critical patent/NL8901345A/nl
Priority to MX020431A priority patent/MX172510B/es
Priority to DE69021272T priority patent/DE69021272T2/de
Priority to AT90201309T priority patent/ATE125969T1/de
Priority to EP90201309A priority patent/EP0400726B1/en
Priority to ES90201309T priority patent/ES2077012T3/es
Priority to UA4743863A priority patent/UA34411C2/uk
Priority to CS902562A priority patent/CZ285217B6/cs
Priority to SU4743863A priority patent/RU2107335C1/ru
Priority to HU903204A priority patent/HU208756B/hu
Priority to BR909002481A priority patent/BR9002481A/pt
Priority to CN90103955A priority patent/CN1023430C/zh
Priority to KR1019900007688A priority patent/KR100189307B1/ko
Priority to AU55931/90A priority patent/AU646222B2/en
Priority to JP13551390A priority patent/JP3162065B2/ja
Publication of NL8901345A publication Critical patent/NL8901345A/nl
Priority to US08/427,781 priority patent/US5623472A/en
Priority to HK61796A priority patent/HK61796A/xx

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • 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
    • G11B11/10517—Overwriting or erasing
    • 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
    • G11B11/1053—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 to compensate for the magnetic domain drift or time shift
    • 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
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/006—Overwriting
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Recording Measured Values (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
NL8901345A 1989-05-29 1989-05-29 Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager. NL8901345A (nl)

Priority Applications (17)

Application Number Priority Date Filing Date Title
NL8901345A NL8901345A (nl) 1989-05-29 1989-05-29 Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager.
MX020431A MX172510B (es) 1989-05-29 1990-04-24 Metodo y aparato para grabar señales en una portadora de grabacion, metodo de medicion y dispositivo de medicion para utilizarse en el metodo de grabacion y el aparato de grabacion y portadora de grabacion
DE69021272T DE69021272T2 (de) 1989-05-29 1990-05-23 Verfahren und Gerät zur Aufzeichnung von Signalen auf einem Aufzeichnungsträger, Messverfahren und Messvorrichtung zur Anwendung in der Aufzeichnungsmethode und dem Aufzeichnungsgerät und Aufzeichnungsträger.
AT90201309T ATE125969T1 (de) 1989-05-29 1990-05-23 Verfahren und gerät zur aufzeichnung von signalen auf einem aufzeichnungsträger, messverfahren und messvorrichtung zur anwendung in der aufzeichnungsmethode und dem aufzeichnungsgerät und aufzeichnungsträger.
EP90201309A EP0400726B1 (en) 1989-05-29 1990-05-23 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
ES90201309T ES2077012T3 (es) 1989-05-29 1990-05-23 Metodo y aparato para registrar señales en un soporte de registro, metodo de medicion y dispositivo de medicion para uso en el metodo de registro y en el aparato para registro, y soporte de registro.
CS902562A CZ285217B6 (cs) 1989-05-29 1990-05-25 Nosič záznamu, způsob a zařízení pro zaznamenávání signálů na nosič záznamu
UA4743863A UA34411C2 (uk) 1989-05-29 1990-05-25 Спосіб та пристрій для запису сигналів, спосіб та пристрій для вимірювання для використання в способі та пристрої для запису сигналів і носій запису
SU4743863A RU2107335C1 (ru) 1989-05-29 1990-05-25 Способ и записывающее устройство для перезаписи существующего на магнитооптическом носителе информационного узора и магнитооптический носитель записи
HU903204A HU208756B (en) 1989-05-29 1990-05-25 Method and apparatus for recording signals on data-carrier, as well as data-carrier
BR909002481A BR9002481A (pt) 1989-05-29 1990-05-25 Processo para registro de sinais em um portador de registros,processo de medicao,aparelho para registro para gravacao,dispositivo de medida e portador de registros
CN90103955A CN1023430C (zh) 1989-05-29 1990-05-26 信号记录方法和设备及其所用测量法和仪器
KR1019900007688A KR100189307B1 (ko) 1989-05-29 1990-05-28 레코드 캐리어상에 신호를 기록하기 위한 방법 및 장치, 측정장치와 레코드 캐리어
AU55931/90A AU646222B2 (en) 1989-05-29 1990-05-28 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier.
JP13551390A JP3162065B2 (ja) 1989-05-29 1990-05-28 信号記録方法及び装置並びにこれに用いられる書込強度選択方法及び装置
US08/427,781 US5623472A (en) 1989-05-29 1994-03-02 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
HK61796A HK61796A (en) 1989-05-29 1996-04-11 Method and apparatus for recording signals on a record carrier measurement method and measurement device for use in the recording method and the recording apparatus and record carrier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8901345 1989-05-29
NL8901345A NL8901345A (nl) 1989-05-29 1989-05-29 Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager.

Publications (1)

Publication Number Publication Date
NL8901345A true NL8901345A (nl) 1990-12-17

Family

ID=19854729

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8901345A NL8901345A (nl) 1989-05-29 1989-05-29 Werkwijze en inrichting voor het optekenen van signalen op een registratiedrager, alsmede een meetwerkwijze en meetinrichting voor toepassing in de optekenwerkwijze en optekeninrichting, alsmede een registratiedrager.

Country Status (17)

Country Link
US (1) US5623472A (pt)
EP (1) EP0400726B1 (pt)
JP (1) JP3162065B2 (pt)
KR (1) KR100189307B1 (pt)
CN (1) CN1023430C (pt)
AT (1) ATE125969T1 (pt)
AU (1) AU646222B2 (pt)
BR (1) BR9002481A (pt)
CZ (1) CZ285217B6 (pt)
DE (1) DE69021272T2 (pt)
ES (1) ES2077012T3 (pt)
HK (1) HK61796A (pt)
HU (1) HU208756B (pt)
MX (1) MX172510B (pt)
NL (1) NL8901345A (pt)
RU (1) RU2107335C1 (pt)
UA (1) UA34411C2 (pt)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559391B1 (en) * 1992-03-03 1998-06-03 Canon Kabushiki Kaisha Magnetooptical recording/reproducing method and apparatus
US7548497B2 (en) 1992-10-05 2009-06-16 Mitsubishi Denki Kabushiki Kaisha Optical disk and optical disk drive device
US6529451B2 (en) 1992-10-05 2003-03-04 Mitsubishi Denki Kabushiki Kaisha Optical disk and optical disk drive device
EP0599389B1 (en) * 1992-11-20 1998-10-07 Koninklijke Philips Electronics N.V. Method and recording device for recording signals on a record carrier
TW234182B (pt) * 1992-11-20 1994-11-11 Philips Electronics Nv
US5703855A (en) * 1993-04-06 1997-12-30 Hitachi, Ltd. Optical disk apparatus and recording and reading method for an optical disk using the same
EP0700565B1 (en) * 1994-02-14 2000-07-12 Koninklijke Philips Electronics N.V. Method and recording device for recording signals on a record carrier
WO1997006530A1 (fr) 1995-08-09 1997-02-20 Hitachi, Ltd. Dispositif de disque optique
US5825724A (en) * 1995-11-07 1998-10-20 Nikon Corporation Magneto-optical recording method using laser beam intensity setting based on playback signal
US5831943A (en) * 1995-11-07 1998-11-03 Nikon Corporation Stabilized overwriteable optical recording method using laser beam intensity settings
JP2000516377A (ja) * 1997-05-01 2000-12-05 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 光学記録媒体に書き込む方法および装置
JP3579214B2 (ja) * 1997-06-24 2004-10-20 富士通株式会社 光学的記憶装置
KR100312493B1 (ko) * 1997-12-31 2001-12-28 구자홍 광자기기록매체상의기록방법및장치
FR2786005B1 (fr) * 1998-11-17 2002-04-12 Commissariat Energie Atomique Procede d'ecriture et de lecture d'un support d'informations comprenant un materiau avec une succession de zones presentant respectivement un premier et un deuxieme etats physiques
US6298023B1 (en) * 1999-05-27 2001-10-02 Shengquan Wu Method and apparatus for controlling the writing of information onto a storage medium
JP3647681B2 (ja) * 1999-08-26 2005-05-18 富士通株式会社 情報記憶装置
US6557126B1 (en) * 2000-01-31 2003-04-29 Oak Technology, Inc. Method and apparatus for calibrating write power
US6611927B1 (en) * 2000-05-25 2003-08-26 Oak Technology, Inc. Apparatus and method for ideal value estimation in an optical PRML read channel
WO2002011132A1 (fr) * 2000-07-28 2002-02-07 Matsushita Electric Industrial Co., Ltd. Dispositif a disque optique et procede de determination de puissance d'enregistrement
JP2003317344A (ja) * 2002-04-26 2003-11-07 Canon Inc 光磁気記録方法、及び光磁気記録装置
US7514037B2 (en) * 2002-08-08 2009-04-07 Kobe Steel, Ltd. AG base alloy thin film and sputtering target for forming AG base alloy thin film
US10049694B2 (en) * 2016-08-11 2018-08-14 Carnegie Mellon University Heat-assisted magnetic recording head having a non-uniform air-bearing surface
EP3746270A4 (en) 2018-02-01 2021-10-13 ABB Schweiz AG VISION-BASED OPERATION FOR ROBOTS

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL173104C (nl) * 1977-02-09 1983-12-01 Victor Company Of Japan Informatiesignaalregistratiemedium van roterende soort en inrichting voor het registreren van informatiesignalen daarop.
JPS54128303A (en) * 1978-03-29 1979-10-04 Victor Co Of Japan Ltd Optical reproducing device of information recording medium disc
GB2077065B (en) * 1980-02-23 1985-01-09 Sharp Kk Magnetooptic memory medium
US4985881A (en) * 1983-12-23 1991-01-15 Hitachi, Ltd. Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter
US4872078A (en) * 1986-04-24 1989-10-03 International Business Machines Corporation Method and apparatus for encoding and direct overwriting of magneto-optic data
JPH07111782B2 (ja) * 1986-08-13 1995-11-29 ソニー株式会社 光デイスクの記録再生装置
EP0312143B1 (en) * 1987-10-14 1993-08-18 Koninklijke Philips Electronics N.V. Magneto-optical recording apparatus and energizing circuit for use in such a magneto-optical recording apparatus
US5270987A (en) * 1988-02-08 1993-12-14 Hitachi, Ltd. Magneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium therefor
JP2912373B2 (ja) * 1988-04-20 1999-06-28 シャープ株式会社 光磁気記録再生装置
JP2589370B2 (ja) * 1989-04-13 1997-03-12 シャープ株式会社 光ディスク装置
US5321672A (en) * 1989-04-19 1994-06-14 Hitachi, Ltd. Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains

Also Published As

Publication number Publication date
CZ256290A3 (en) 1995-02-15
DE69021272T2 (de) 1996-04-04
MX172510B (es) 1993-12-17
EP0400726B1 (en) 1995-08-02
BR9002481A (pt) 1991-08-13
ES2077012T3 (es) 1995-11-16
HU208756B (en) 1993-12-28
US5623472A (en) 1997-04-22
EP0400726A1 (en) 1990-12-05
KR100189307B1 (ko) 1999-06-01
CN1023430C (zh) 1994-01-05
ATE125969T1 (de) 1995-08-15
KR900018911A (ko) 1990-12-22
AU646222B2 (en) 1994-02-17
UA34411C2 (uk) 2001-03-15
DE69021272D1 (de) 1995-09-07
JP3162065B2 (ja) 2001-04-25
AU5593190A (en) 1990-11-29
CN1047750A (zh) 1990-12-12
JPH0319162A (ja) 1991-01-28
RU2107335C1 (ru) 1998-03-20
CZ285217B6 (cs) 1999-06-16
HUT53975A (en) 1990-12-28
HK61796A (en) 1996-04-19
HU903204D0 (en) 1990-10-28

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