BR9004532A - Processo de gravacao de leitura por via optica de informacoes e aparelho para sua realizacao - Google Patents

Processo de gravacao de leitura por via optica de informacoes e aparelho para sua realizacao

Info

Publication number
BR9004532A
BR9004532A BR909004532A BR9004532A BR9004532A BR 9004532 A BR9004532 A BR 9004532A BR 909004532 A BR909004532 A BR 909004532A BR 9004532 A BR9004532 A BR 9004532A BR 9004532 A BR9004532 A BR 9004532A
Authority
BR
Brazil
Prior art keywords
frequency
information
information signal
energising current
performance
Prior art date
Application number
BR909004532A
Other languages
English (en)
Inventor
Johannes Hendrikus Mari Spruit
Bernardus Antonius Joha Jacobs
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
Publication of BR9004532A publication Critical patent/BR9004532A/pt

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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Facsimiles In General (AREA)
BR909004532A 1989-09-14 1990-09-11 Processo de gravacao de leitura por via optica de informacoes e aparelho para sua realizacao BR9004532A (pt)

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
BR9004532A true BR9004532A (pt) 1991-09-10

Family

ID=19855305

Family Applications (1)

Application Number Title Priority Date Filing Date
BR909004532A BR9004532A (pt) 1989-09-14 1990-09-11 Processo de gravacao de leitura por via optica de informacoes e aparelho para sua realizacao

Country Status (10)

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

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
EP0447265B1 (en) * 1990-03-16 1997-05-21 Canon Kabushiki Kaisha Optical information recording/reproducing apparatus
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
JP2003529871A (ja) 2000-03-31 2003-10-07 シーゲイト テクノロジー エルエルシー データ記憶装置における磁界保持電流と共に使用されるのに適当なパルス書込み電流
JP4097597B2 (ja) 2001-06-01 2008-06-11 富士通株式会社 光磁気記録媒体装置
KR100424267B1 (ko) * 2001-06-08 2004-03-24 주식회사 취영루 만두 속 및 그 만두 속 제조방법
EP2030203A1 (en) * 2006-06-15 2009-03-04 Thomson Licensing Disc authentication by grayscale image
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

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
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
EP0417858A1 (en) 1991-03-20
CZ442790A3 (en) 1994-03-16
KR910006929A (ko) 1991-04-30
EP0417858B1 (en) 1995-01-11
CN1022956C (zh) 1993-12-01
ATE117119T1 (de) 1995-01-15
NL8902293A (nl) 1991-04-02
JPH03105749A (ja) 1991-05-02
US5065377A (en) 1991-11-12
CN1050276A (zh) 1991-03-27
DE69015933D1 (de) 1995-02-23

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Legal Events

Date Code Title Description
KF Request for proof of payment of annual fee
FD5 Application fees: dismissal - article 86 of industrial property law