NL8902728A - 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
NL8902728A
NL8902728A NL8902728A NL8902728A NL8902728A NL 8902728 A NL8902728 A NL 8902728A NL 8902728 A NL8902728 A NL 8902728A NL 8902728 A NL8902728 A NL 8902728A NL 8902728 A NL8902728 A NL 8902728A
Authority
NL
Netherlands
Prior art keywords
radiation
information
signal
domains
information layer
Prior art date
Application number
NL8902728A
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 NL8902728A priority Critical patent/NL8902728A/nl
Priority to AT90202896T priority patent/ATE118636T1/de
Priority to DE69016928T priority patent/DE69016928D1/de
Priority to EP90202896A priority patent/EP0427325B1/de
Priority to CN90109009A priority patent/CN1024054C/zh
Priority to KR1019900017810A priority patent/KR910010433A/ko
Priority to JP2299080A priority patent/JPH03207042A/ja
Publication of NL8902728A publication Critical patent/NL8902728A/nl
Priority to US07/998,898 priority patent/US5371721A/en

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
    • G11B11/10502—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
    • G11B11/10502—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
    • G11B11/10504—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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
NL8902728A 1989-11-06 1989-11-06 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager. NL8902728A (nl)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL8902728A NL8902728A (nl) 1989-11-06 1989-11-06 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
AT90202896T ATE118636T1 (de) 1989-11-06 1990-11-02 Verfahren und anordnung zum beschreiben und lesen eines magnetooptischen aufzeichnungsträgers.
DE69016928T DE69016928D1 (de) 1989-11-06 1990-11-02 Verfahren und Anordnung zum Beschreiben und Lesen eines magnetooptischen Aufzeichnungsträgers.
EP90202896A EP0427325B1 (de) 1989-11-06 1990-11-02 Verfahren und Anordnung zum Beschreiben und Lesen eines magnetooptischen Aufzeichnungsträgers
CN90109009A CN1024054C (zh) 1989-11-06 1990-11-03 写入和读出磁光记录载体的方法和装置
KR1019900017810A KR910010433A (ko) 1989-11-06 1990-11-05 자기-광학 레코드 캐리어의 기록 및 판독 방법 및 장치
JP2299080A JPH03207042A (ja) 1989-11-06 1990-11-06 磁気光学書込―読取方法及び装置
US07/998,898 US5371721A (en) 1989-11-06 1992-12-28 Method and apparatus for writing and reading a magneto-optical record carrier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902728A NL8902728A (nl) 1989-11-06 1989-11-06 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
NL8902728 1989-11-06

Publications (1)

Publication Number Publication Date
NL8902728A true NL8902728A (nl) 1991-06-03

Family

ID=19855567

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8902728A NL8902728A (nl) 1989-11-06 1989-11-06 Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.

Country Status (8)

Country Link
US (1) US5371721A (de)
EP (1) EP0427325B1 (de)
JP (1) JPH03207042A (de)
KR (1) KR910010433A (de)
CN (1) CN1024054C (de)
AT (1) ATE118636T1 (de)
DE (1) DE69016928D1 (de)
NL (1) NL8902728A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329408A (en) * 1991-07-10 1994-07-12 Sharp Kabushiki Kaisha Magnetic field modulation magnet-optical recording apparatus in which an FM modulator and a magnetic head driving circuit are used in common
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
KR100236004B1 (ko) * 1997-10-31 2000-01-15 구자홍 광자기 기록매체로부터 기록정보를 재생하는 장치및 방법
US6671235B1 (en) * 2000-03-27 2003-12-30 Ultratech Stepper, Inc. Method of and apparatus for defining disk tracks in magnetic recording media
JP4540811B2 (ja) * 2000-08-11 2010-09-08 シャープ株式会社 磁気信号記録方法および磁気記録再生装置
US7345987B2 (en) * 2003-01-21 2008-03-18 Kenley Earl Brinkerhoff Optical disc which stores digital information in informational units which diffract a line of laser light at one of 1024 angles and a corresponding light detecting apparatus for reproducing information from said optical disc
JP2005267778A (ja) * 2004-03-19 2005-09-29 Fujitsu Ltd データ記録再生装置、記録媒体、データ記録再生方法およびデータ記録再生プログラム

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113402A (en) * 1981-01-05 1982-07-14 Ricoh Co Ltd Method and device for vertical thermomagnetic recording
JPH0721895B2 (ja) * 1985-02-19 1995-03-08 日本電気株式会社 光磁気記録方法
US4796241A (en) * 1986-01-23 1989-01-03 Sony Corporation Device for producing a high frequency modulation magnetic field used in magneto-optical recording
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
DE3732874A1 (de) * 1987-09-30 1989-04-20 Thomson Brandt Gmbh Optische abtastvorrichtung
JPS647327A (en) * 1987-03-25 1989-01-11 Casio Computer Co Ltd Method and apparatus for optical information recording
DE3883342T2 (de) * 1987-10-14 1994-03-10 Philips Nv Magnetooptische Aufzeichnungsvorrichtung und Betätigungsschaltung zur Anwendung in derartigen, magnetooptischen Aufzeichnungsvorrichtungen.
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
US5014254A (en) * 1988-05-09 1991-05-07 U.S. Philips Corporation Magneto-optical recording method and magneto-optical recording apparatus
US5163031A (en) * 1988-12-07 1992-11-10 Canon Kabushiki Kaisha Method of recording tetra-value signal on magneto-optical recording medium with plural magnetic layers
JP2701403B2 (ja) * 1988-12-29 1998-01-21 ソニー株式会社 光磁気デイスク装置

Also Published As

Publication number Publication date
EP0427325A1 (de) 1991-05-15
CN1024054C (zh) 1994-03-16
DE69016928D1 (de) 1995-03-23
CN1051812A (zh) 1991-05-29
US5371721A (en) 1994-12-06
JPH03207042A (ja) 1991-09-10
KR910010433A (ko) 1991-06-29
ATE118636T1 (de) 1995-03-15
EP0427325B1 (de) 1995-02-15

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