ES2039531T3 - Procedimiento para un dispositivo explorador optico. - Google Patents

Procedimiento para un dispositivo explorador optico.

Info

Publication number
ES2039531T3
ES2039531T3 ES198888113490T ES88113490T ES2039531T3 ES 2039531 T3 ES2039531 T3 ES 2039531T3 ES 198888113490 T ES198888113490 T ES 198888113490T ES 88113490 T ES88113490 T ES 88113490T ES 2039531 T3 ES2039531 T3 ES 2039531T3
Authority
ES
Spain
Prior art keywords
recording medium
data
data signal
optical
photodetector
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
ES198888113490T
Other languages
English (en)
Inventor
Yasuaki Morimoto
Christian Buchler
Friedheim Zucker
Heinz-Jorg Schroder
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 ES2039531T3 publication Critical patent/ES2039531T3/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
    • 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
    • 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
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • 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
    • G11B11/10532—Heads
    • 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
    • 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
    • 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
    • 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

Abstract

EN UN DISPOSITIVO OPTICO DE PALPADO PARA LEER UN SOPORTE DE REGISTRO MAGNETO - OPTICO, EL RAYO DE LUZ REFLECTADO POR EL SOPORTE DE REGISTRO SE REFLEJA SEGUN LA DIRECCION DE GIRO DE SU PLANO DE POLARIZACION SOBRE UN PRIMERO O SEGUNDO FOTODETECTOR. DE LA DIFERENCIA DE LOS FOTOSENSORES DE AMBOS FOTODETECTORES SE OBTIENE LA SEÑAL DE DATOS. EN LOS NUEVOS SOPORTES DE REGISTRO EN LOS QUE SE ALMACENAN DATOS MEDIANTE PITS Y EN DISPOSITIVOS MAGNETICOS, PARA PODER LEER A LA VEZ AMBOS DATOS, SE OBTIENE DE LA SEÑAL DE SUMA DE AMBAS FOTOTENSIONES LA SEÑAL DE DATOS PS, QUE PRESENTA LOS DATOS QUE SE ALMACENAN MEDIANTE PITS. DE LA SEÑAL DIFERENCIAL DE AMBAS FOTOTENSIONES SE OBTIENE LA SEÑAL DE DATOS MS, QUE PRESENTA LOS DATOS CONTENIDOS EN LOS DISPOSITIVOS MAGNETICOS. LA SEÑAL DE DATOS PS PUEDE OBTENERSE POR EL PROCEDIMIENTO A TRASLUZ, MEDIANTE UN FOTODETECTOR (24, 25) PREVISTO DETRAS DEL SOPORTE DE REGISTRO (5). LA SEÑAL DE DATOS MS PUEDE TAMBIEN OBTENERSE POR EL PROCEDIMIENTO A TRASLUZ MEDIANTE UN POLARIZADOR (27) COLOCADO DETRAS DEL SOPORTE DE REGISTRO (5) Y DOS FOTODETECTORES (28, 29), CON LA DIFERENCIA DE SU SEÑAL DE DATOS PS SE OBTIENE DE LA LUZ REFLEJADA POR EL SOPORTE DE REGISTRO (5).
ES198888113490T 1987-09-30 1988-08-19 Procedimiento para un dispositivo explorador optico. Expired - Lifetime ES2039531T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873732874 DE3732874A1 (de) 1987-09-30 1987-09-30 Optische abtastvorrichtung

Publications (1)

Publication Number Publication Date
ES2039531T3 true ES2039531T3 (es) 1993-10-01

Family

ID=6337169

Family Applications (2)

Application Number Title Priority Date Filing Date
ES198888113490T Expired - Lifetime ES2039531T3 (es) 1987-09-30 1988-08-19 Procedimiento para un dispositivo explorador optico.
ES198888114162T Expired - Lifetime ES2031193T3 (es) 1987-09-30 1988-08-31 Procedimiento para un dispositivo de explotacion optica.

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES198888114162T Expired - Lifetime ES2031193T3 (es) 1987-09-30 1988-08-31 Procedimiento para un dispositivo de explotacion optica.

Country Status (12)

Country Link
US (1) US5014253A (es)
EP (2) EP0310795B1 (es)
JP (2) JPH01166351A (es)
KR (2) KR970007168B1 (es)
AT (2) ATE86777T1 (es)
DE (3) DE3732874A1 (es)
DK (2) DK548388A (es)
ES (2) ES2039531T3 (es)
GR (1) GR3004667T3 (es)
HK (2) HK13596A (es)
HU (2) HUT61121A (es)
MY (2) MY103616A (es)

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Publication number Priority date Publication date Assignee Title
US5325350A (en) * 1986-09-28 1994-06-28 Deutsche Thomson-Brandt Gmbh Pick-up for selectively reading and writing an optical recording medium having pits and magnetic domains
JPH0340252A (ja) * 1989-04-19 1991-02-21 Olympus Optical Co Ltd 光磁気記録媒体の位相差測定装置
DE3923328A1 (de) * 1989-07-14 1991-01-24 Thomson Brandt Gmbh Magneto-optisches aufnahme- und/oder wiedergabegeraet
NL8902728A (nl) * 1989-11-06 1991-06-03 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
US5105415A (en) * 1989-12-11 1992-04-14 International Business Machines Corporation Detecting magnetooptic and intensity-modulated optical signals with the same detector
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
EP0447265B1 (en) * 1990-03-16 1997-05-21 Canon Kabushiki Kaisha Optical information recording/reproducing apparatus
JP2809835B2 (ja) * 1990-07-30 1998-10-15 松下電器産業株式会社 光ディスク装置および光ディスク
DE4127840A1 (de) * 1991-08-22 1993-02-25 Thomson Brandt Gmbh Optische abtastvorrichtung
DE4140806A1 (de) * 1991-12-11 1993-06-17 Thomson Brandt Gmbh Optische abtastvorrichtung
US5265085A (en) * 1992-06-15 1993-11-23 International Business Machines Simultaneous MO and ROM optical disk signal detection
DE4220486A1 (de) * 1992-06-23 1994-01-05 Thomson Brandt Gmbh Aufzeichnung und Wiedergabe von Informationen bei ROM-RAM-Speichermedien
DE4226777A1 (de) * 1992-08-13 1994-02-17 Thomson Brandt Gmbh Rauschanteilverringerung im Datensignal und optische Abtastvorrichtung
US5233175A (en) * 1992-08-24 1993-08-03 International Business Machines Corporation Laser power control independent of beamsplitter transmissivity
KR100230225B1 (ko) * 1992-11-30 1999-11-15 윤종용 발광램프를 이용한 광픽업
JPH0714231A (ja) * 1993-06-29 1995-01-17 Sharp Corp 光磁気ディスク、光ピックアップ及び光磁気ディスク装置
KR950013702B1 (ko) * 1993-07-15 1995-11-13 엘지전자주식회사 광자기 디스크의 광픽업 장치
TW238381B (en) * 1993-10-29 1995-01-11 Ibm Optical data storage cartridge system
DE4415508A1 (de) 1994-05-03 1995-11-09 Thomson Brandt Gmbh Abtastgerät mit Adaptation
US5537383A (en) * 1995-03-01 1996-07-16 Eastman Kodak Company Optical data storage system with differential data detection and source noise subtraction for use with magneto-optic, write-once and other optical media
US5586101A (en) * 1995-03-01 1996-12-17 Eastman Kodak Company Magneto-optic data storage system with differential detection channels having separate gain control circuit
EP1403858B1 (en) * 1998-08-20 2004-12-29 Matsushita Electric Industrial Co., Ltd. Laser power controller and optical disk device
WO2003060897A1 (fr) 2002-01-11 2003-07-24 Fujitsu Limited Dispositif de stockage
JP3913671B2 (ja) * 2002-12-09 2007-05-09 株式会社リコー 情報記録方法および情報記録再生装置
US7763198B2 (en) * 2005-04-12 2010-07-27 Abbott Cardiovascular Systems Inc. Method for retaining a vascular stent on a catheter
KR100791083B1 (ko) * 2007-10-17 2008-01-03 대원계전주식회사 전원 개폐용 스위치

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923013B2 (ja) * 1977-05-31 1984-05-30 日本電信電話株式会社 光学的信号再生装置
JPS54143109A (en) * 1978-04-28 1979-11-08 Hitachi Ltd Optical information device
WO1980001016A1 (en) * 1978-11-01 1980-05-15 Hitachi Ltd Magneto-optical anisotropy detecting device
JPS57147148A (en) * 1981-03-05 1982-09-10 Olympus Optical Co Ltd Information reproducer with magnetooptic system
JPS5979446A (ja) * 1982-10-28 1984-05-08 Sharp Corp 磁気光学ヘッド
JPS6035351A (ja) * 1983-08-06 1985-02-23 Brother Ind Ltd 光磁気再生装置
JPH0664765B2 (ja) * 1984-06-29 1994-08-22 株式会社日立製作所 情報記録再生装置
JPS61222037A (ja) * 1985-03-27 1986-10-02 Toshiba Corp デイスク装置
FR2597643A1 (fr) * 1985-11-08 1987-10-23 Seiko Epson Corp Systeme de lecture de signal magneto-optique
JPS62110643A (ja) * 1985-11-08 1987-05-21 Seiko Epson Corp 光磁気信号検出方法
FR2591787A1 (fr) * 1985-12-13 1987-06-19 Thomson Csf Dispositif d'enregistrement-lecture polyvalent de support d'enregistrement
JPS62170054A (ja) * 1986-01-21 1987-07-27 Seiko Epson Corp 光学ヘツド

Also Published As

Publication number Publication date
DE3879073D1 (de) 1993-04-15
US5014253A (en) 1991-05-07
DK548188A (da) 1989-03-31
EP0310795A1 (de) 1989-04-12
MY103616A (en) 1993-08-28
DK548388D0 (da) 1988-09-30
HUT61121A (en) 1992-11-30
KR970007167B1 (ko) 1997-05-03
HK13596A (en) 1996-02-02
DE3869894D1 (de) 1992-05-14
HK15896A (en) 1996-02-02
JP3112907B2 (ja) 2000-11-27
JPH01166351A (ja) 1989-06-30
ATE86777T1 (de) 1993-03-15
HUT62723A (en) 1993-05-28
JPH01166350A (ja) 1989-06-30
KR970007168B1 (ko) 1997-05-03
KR890005677A (ko) 1989-05-16
GR3004667T3 (es) 1993-04-28
EP0310795B1 (de) 1993-03-10
DK548388A (da) 1989-03-31
EP0310812A1 (de) 1989-04-12
KR890005678A (ko) 1989-05-16
MY103615A (en) 1993-08-28
ATE74682T1 (de) 1992-04-15
EP0310812B1 (de) 1992-04-08
ES2031193T3 (es) 1992-12-01
DE3732874A1 (de) 1989-04-20
DK548188D0 (da) 1988-09-30

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