ES2056473T3 - Aparato de grabacion y/o reproduccion magnetooptico. - Google Patents

Aparato de grabacion y/o reproduccion magnetooptico.

Info

Publication number
ES2056473T3
ES2056473T3 ES90911757T ES90911757T ES2056473T3 ES 2056473 T3 ES2056473 T3 ES 2056473T3 ES 90911757 T ES90911757 T ES 90911757T ES 90911757 T ES90911757 T ES 90911757T ES 2056473 T3 ES2056473 T3 ES 2056473T3
Authority
ES
Spain
Prior art keywords
pits
magnetic
optical
reproduction device
laser
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES90911757T
Other languages
English (en)
Inventor
Yasuaki Morimoto
Friedhelm Zucker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
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 Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Application granted granted Critical
Publication of ES2056473T3 publication Critical patent/ES2056473T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers

Landscapes

  • Optical Head (AREA)
  • Holo Graphy (AREA)
  • Liquid Crystal (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Magnetic Heads (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

EN UN GRABADOR OPTICO-MAGNETICO Y/O DISPOSITIVO REPRODUCTOR EN EL QUE SE PUEDEN LEER SIMULTANEAMENTE DATOS ALMACENADOS EN PITS Y EN UN SOPORTE OPTICO MAGNETICO, EXISTE EL PELIGRO DE QUE SE INTERFIERAN MUTUAMENTE LAS DOS SEÑALES DE DATOS, POR EJEMPLO, POR UNA CONVERSACION CRUZADO. LAS INTERFERENCIAS MUTUAS DE LAS DOS SEÑALES DE DATOS SE IMPIDE POR LA INVENCION, LA CUAL COMPRENDE UN PRIMER LASER (1) PARA EXPLORAR LOS PITS, CON UNA LONGITUD DE ONDA LAMBDA SUB 1 APROXIMADAMENTE CUATRO VECES MAYOR QUE LA PROFUNDIDAD DE LOS PITS, Y UN SEGUNDO LASER (10) PARA LEER LOS DATOS ALMACENADOS EN EL SOPORTE OPTICO-MAGNETICO, CON UNA LONGITUD DE ONDA LAMBDA SUB 2 APROXIMADAMENTE DEL DOBLE DE LA PROFUNDIDAD DE LOS PITS. LA INVENCION SE PUEDE APLICAR A LA GRABACION OPTICO MAGNETICA Y/O DISPOSITIVOS DE REPRODUCCION.
ES90911757T 1989-07-14 1990-06-29 Aparato de grabacion y/o reproduccion magnetooptico. Expired - Lifetime ES2056473T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3923328A DE3923328A1 (de) 1989-07-14 1989-07-14 Magneto-optisches aufnahme- und/oder wiedergabegeraet

Publications (1)

Publication Number Publication Date
ES2056473T3 true ES2056473T3 (es) 1994-10-01

Family

ID=6385047

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90911757T Expired - Lifetime ES2056473T3 (es) 1989-07-14 1990-06-29 Aparato de grabacion y/o reproduccion magnetooptico.

Country Status (15)

Country Link
US (1) US5375109A (es)
EP (1) EP0485448B1 (es)
JP (1) JP3112087B2 (es)
KR (1) KR0168456B1 (es)
CN (1) CN1021492C (es)
AT (1) ATE107790T1 (es)
AU (1) AU6060090A (es)
DD (1) DD296774A5 (es)
DE (2) DE3923328A1 (es)
ES (1) ES2056473T3 (es)
FI (1) FI920143A7 (es)
HK (1) HK108095A (es)
HU (1) HUT60561A (es)
MY (1) MY106015A (es)
WO (1) WO1991001553A1 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
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
JPH0668599U (ja) * 1993-03-12 1994-09-27 株式会社イナックス トイレ設備
DE69635559T2 (de) * 1995-06-05 2006-06-14 Nec Corp Optische Wiedergabekopfvorrichtung für verschiedene Plattentypen
US5756038A (en) * 1996-04-01 1998-05-26 Seda Specialty Packaging Corp. Process of reshaping decorated plastic materials

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6113458A (ja) * 1984-06-29 1986-01-21 Hitachi Ltd 光学的情報記録媒体およびカツテイング装置
JPS6142738A (ja) * 1984-08-06 1986-03-01 Hikari Yokoekawa 光学式記録再生システム
JPS6151631A (ja) * 1984-08-20 1986-03-14 Sharp Corp 光磁気メモリ素子
NL8500153A (nl) * 1985-01-22 1986-08-18 Philips Nv Registratiedragerlichaam voorzien van een reliefstruktuur van optisch detekteerbare servospoorgedeelten en sektoradressen en inrichting voor het aanbrengen van deze struktuur.
JPS61206436A (ja) * 1985-03-08 1986-09-12 旭光学工業株式会社 レ−ザ−メス装置
JPS61206947A (ja) * 1985-03-11 1986-09-13 Nippon Kogaku Kk <Nikon> 同時消録型光磁気記録及び記録再生装置のピツクアツプ
DE3732874A1 (de) * 1987-09-30 1989-04-20 Thomson Brandt Gmbh Optische abtastvorrichtung
NL8800133A (nl) * 1988-01-21 1989-08-16 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
JP2870127B2 (ja) * 1990-05-31 1999-03-10 ソニー株式会社 トラッキング制御方法

Also Published As

Publication number Publication date
JPH04506722A (ja) 1992-11-19
HK108095A (en) 1995-07-14
WO1991001553A1 (de) 1991-02-07
AU6060090A (en) 1991-02-22
DE59006249D1 (de) 1994-07-28
KR920702529A (ko) 1992-09-04
HU9200017D0 (en) 1992-04-28
EP0485448A1 (de) 1992-05-20
CN1021492C (zh) 1993-06-30
DE3923328A1 (de) 1991-01-24
MY106015A (en) 1995-02-28
HUT60561A (en) 1992-09-28
ATE107790T1 (de) 1994-07-15
US5375109A (en) 1994-12-20
KR0168456B1 (ko) 1999-03-20
FI920143A0 (fi) 1992-01-13
CN1048762A (zh) 1991-01-23
EP0485448B1 (de) 1994-06-22
DD296774A5 (de) 1991-12-12
JP3112087B2 (ja) 2000-11-27
FI920143A7 (fi) 1992-01-13

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