NL9001546A - Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager. - Google Patents

Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager. Download PDF

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Publication number
NL9001546A
NL9001546A NL9001546A NL9001546A NL9001546A NL 9001546 A NL9001546 A NL 9001546A NL 9001546 A NL9001546 A NL 9001546A NL 9001546 A NL9001546 A NL 9001546A NL 9001546 A NL9001546 A NL 9001546A
Authority
NL
Netherlands
Prior art keywords
unit
magnetic
detector
optical
focusing
Prior art date
Application number
NL9001546A
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 NL9001546A priority Critical patent/NL9001546A/nl
Priority to US07/585,342 priority patent/US5191562A/en
Priority to MYPI91001132A priority patent/MY107575A/en
Priority to ES91201687T priority patent/ES2099128T3/es
Priority to DE69124150T priority patent/DE69124150T2/de
Priority to EP91201687A priority patent/EP0464947B1/en
Priority to KR1019910011226A priority patent/KR920003275A/ko
Priority to JP3191269A priority patent/JPH04229436A/ja
Publication of NL9001546A publication Critical patent/NL9001546A/nl

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
    • G11B11/10532—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
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/10573—Control of relative positioning of the magnetic and optical transducers, e.g. to move simultaneously
NL9001546A 1990-07-06 1990-07-06 Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager. NL9001546A (nl)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL9001546A NL9001546A (nl) 1990-07-06 1990-07-06 Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
US07/585,342 US5191562A (en) 1990-07-06 1990-09-19 Positioning system for the heads of a magneto-optical data recorder
MYPI91001132A MY107575A (en) 1990-07-06 1991-06-24 Positioning system for the heads of a magneto-optical data recorder
ES91201687T ES2099128T3 (es) 1990-07-06 1991-07-02 Dispositivo para inscribir y/o leer un portador de informacion magneto-optico.
DE69124150T DE69124150T2 (de) 1990-07-06 1991-07-02 Einrichtung zum Einschreiben und/oder Auslesen eines magnetoptischen Informationsträgers
EP91201687A EP0464947B1 (en) 1990-07-06 1991-07-02 Device for inscribing and/or reading a magneto-optical information carrier
KR1019910011226A KR920003275A (ko) 1990-07-06 1991-07-03 자기-광학 정보 캐리어 기록 및 판독장치
JP3191269A JPH04229436A (ja) 1990-07-06 1991-07-05 光磁気情報キャリヤ書込み及び／又は読取り装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9001546A NL9001546A (nl) 1990-07-06 1990-07-06 Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
NL9001546 1990-07-06

Publications (1)

Publication Number Publication Date
NL9001546A true NL9001546A (nl) 1992-02-03

Family

ID=19857378

Family Applications (1)

Application Number Title Priority Date Filing Date
NL9001546A NL9001546A (nl) 1990-07-06 1990-07-06 Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.

Country Status (8)

Country Link
US (1) US5191562A (es)
EP (1) EP0464947B1 (es)
JP (1) JPH04229436A (es)
KR (1) KR920003275A (es)
DE (1) DE69124150T2 (es)
ES (1) ES2099128T3 (es)
MY (1) MY107575A (es)
NL (1) NL9001546A (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3393655B2 (ja) * 1992-02-27 2003-04-07 パイオニア株式会社 光ディスクプレーヤ
EP0564148B1 (en) * 1992-03-31 1998-07-22 Canon Kabushiki Kaisha Magnetooptical information recording/reproducing apparatus and method using magnetic head
US5408455A (en) * 1992-04-08 1995-04-18 Asahi Kogaku Kogyo Kabushiki Kaisha Control device for head unit having optical head and multiple magnetic heads
US5495455A (en) * 1992-04-28 1996-02-27 Sony Corporation Magneto-optical disk recording and reading apparatus and method wherein the recording head is controlled in the radial direction of the disk to a desired position
US5297122A (en) * 1992-09-14 1994-03-22 Hewlett-Packard Company Dust protection assembly for magneto-optic drive apparatus
US5416753A (en) * 1992-11-16 1995-05-16 Asahi Kogaku Kogyo Kabushiki Kaisha Magneto-optical disk drive system with head position adjustability
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
WO1999018576A2 (en) * 1997-10-06 1999-04-15 Koninklijke Philips Electronics N.V. An apparatus for reading and/or writing information from/on a recording medium
JP3579616B2 (ja) * 1999-06-21 2004-10-20 ペンタックス株式会社 磁気ヘッド昇降機構
US7933191B2 (en) * 2006-10-27 2011-04-26 Van Brocklin Andrew L Optical disc drive having two optomechanical mechanisms

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2522405C2 (de) * 1975-05-21 1982-04-15 Philips Patentverwaltung Gmbh, 2000 Hamburg Optisches Mehrkanal-Plattenspeichersystem zum Speichern von digitaler Information
US4327434A (en) * 1980-01-28 1982-04-27 Rca Corporation Video disc stylus position sensor system
JPH0619863B2 (ja) * 1984-06-13 1994-03-16 株式会社日立製作所 光磁気情報記憶方法及び装置
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus
JP2574747B2 (ja) * 1985-11-20 1997-01-22 株式会社日立製作所 光磁気記録装置
US4870635A (en) * 1986-09-19 1989-09-26 International Business Machines Corporation Precision measurement and positioning system for disk storage system
US4789972A (en) * 1986-12-22 1988-12-06 International Business Machines Corporation Selectively controlling the erasure in a magneto-optic recording medium
JPS63177304A (ja) * 1987-01-16 1988-07-21 Sanyo Electric Co Ltd 光磁気情報記録装置の外部磁界印加装置
JPS6479942A (en) * 1987-09-21 1989-03-24 Toshiba Corp Information processor
DE68921087D1 (de) * 1988-04-06 1995-03-23 Mitsubishi Electric Corp Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe.
JPH01287849A (ja) * 1988-05-13 1989-11-20 Tokyo Electric Co Ltd 光磁気デイスク装置
JP2624793B2 (ja) * 1988-08-12 1997-06-25 株式会社東芝 Ｐｗｍ昇圧コンバータの制御装置
JPH02220273A (ja) * 1989-02-21 1990-09-03 Pioneer Electron Corp ディスク演奏装置におけるスライダー制御装置
NL8900751A (nl) * 1989-03-28 1990-10-16 Philips Nv Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
NL8900752A (nl) * 1989-03-28 1990-10-16 Philips Nv Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
JPH07118106B2 (ja) * 1990-03-08 1995-12-18 パイオニア株式会社 光磁気記録再生装置

Also Published As

Publication number Publication date
US5191562A (en) 1993-03-02
JPH04229436A (ja) 1992-08-18
DE69124150D1 (de) 1997-02-27
ES2099128T3 (es) 1997-05-16
DE69124150T2 (de) 1997-07-10
KR920003275A (ko) 1992-02-29
EP0464947B1 (en) 1997-01-15
MY107575A (en) 1996-04-30
EP0464947A1 (en) 1992-01-08

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BV The patent application has lapsed