DE68910570T2 - Magneto-optische Wiedergabeköpfe. - Google Patents

Magneto-optische Wiedergabeköpfe.

Info

Publication number
DE68910570T2
DE68910570T2 DE89304020T DE68910570T DE68910570T2 DE 68910570 T2 DE68910570 T2 DE 68910570T2 DE 89304020 T DE89304020 T DE 89304020T DE 68910570 T DE68910570 T DE 68910570T DE 68910570 T2 DE68910570 T2 DE 68910570T2
Authority
DE
Germany
Prior art keywords
magneto
playback heads
optical playback
optical
heads
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 - Fee Related
Application number
DE89304020T
Other languages
English (en)
Other versions
DE68910570D1 (de
Inventor
Teiichi C O Patents D Miyauchi
Yutaka C O Patents Divisi Soda
Tetsuo C O Patents Divi Sekiya
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.)
Sony Corp
Original Assignee
Sony Corp
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
Priority claimed from JP63099380A external-priority patent/JPH01271931A/ja
Priority claimed from JP63102300A external-priority patent/JP2629812B2/ja
Priority claimed from JP63243340A external-priority patent/JPH0291831A/ja
Priority claimed from JP63275322A external-priority patent/JPH02122449A/ja
Priority claimed from JP63275330A external-priority patent/JP2907431B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE68910570D1 publication Critical patent/DE68910570D1/de
Publication of DE68910570T2 publication Critical patent/DE68910570T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10545—Heads for reproducing using optical beam of radiation interacting directly with the magnetisation on the record 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
    • 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
    • G11B11/10552—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
    • 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
    • G11B11/1058—Flying heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • 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
    • G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic recording
    • 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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • G11B7/124—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Head (AREA)
DE89304020T 1988-04-22 1989-04-21 Magneto-optische Wiedergabeköpfe. Expired - Fee Related DE68910570T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP63099380A JPH01271931A (ja) 1988-04-22 1988-04-22 光学的再生ヘッド
JP63102300A JP2629812B2 (ja) 1988-04-25 1988-04-25 光再生ピックアップ
JP63243340A JPH0291831A (ja) 1988-09-28 1988-09-28 光再生ピックアップ
JP63275322A JPH02122449A (ja) 1988-10-31 1988-10-31 偏光面検出装置
JP63275330A JP2907431B2 (ja) 1988-10-31 1988-10-31 光磁気ヘッド装置

Publications (2)

Publication Number Publication Date
DE68910570D1 DE68910570D1 (de) 1993-12-16
DE68910570T2 true DE68910570T2 (de) 1994-02-24

Family

ID=27525959

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89304020T Expired - Fee Related DE68910570T2 (de) 1988-04-22 1989-04-21 Magneto-optische Wiedergabeköpfe.

Country Status (4)

Country Link
US (1) US5065390A (de)
EP (1) EP0338864B1 (de)
KR (1) KR970008229B1 (de)
DE (1) DE68910570T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345232A3 (de) * 1988-05-31 1991-07-31 Nikon Corporation Integriertes optisches Gerät für magneto-optischen Aufnahme- und Wiedergabekopf
JPH0834003B2 (ja) * 1990-03-08 1996-03-29 直弘 丹野 光導波路記憶媒体及び光再生装置
JP2961452B2 (ja) * 1990-09-05 1999-10-12 キヤノン株式会社 情報処理装置
JPH04301245A (ja) * 1991-03-28 1992-10-23 Canon Inc 光磁気記録再生用光ヘッド
FR2676303B1 (fr) * 1991-05-07 1993-07-16 Commissariat Energie Atomique Tete magneto-optique integree de lecture et d'ecriture et procede de realisation.
US5289454A (en) * 1991-12-19 1994-02-22 Minnesota Mining And Manufacturing Company Optical disc addressing devices a method of use thereof
US5504722A (en) * 1993-01-27 1996-04-02 Nippon Telegraph And Telephone Corporation Magneto-optic information storage system utilizing a TE/TM mode controlling laser diode
JP2765793B2 (ja) * 1993-03-16 1998-06-18 シャープ株式会社 モード分離素子および光磁気ディスク用ピックアップ
US6181673B1 (en) * 1996-07-30 2001-01-30 Read-Rite Corporation Slider design
US5859814A (en) * 1996-10-18 1999-01-12 The Board Of Trustees Of The Leland Stanford Junior University Magneto-optic recording system and method
US5874939A (en) * 1996-12-10 1999-02-23 Motorola, Inc. Keyboard apparatus and method with voice recognition
US5930434A (en) * 1997-05-15 1999-07-27 Seagate Technology,. Inc. Optical disc data storage system using optical waveguide
JP4290279B2 (ja) * 1999-06-04 2009-07-01 独立行政法人産業技術総合研究所 光学試料体並びにその書込みおよび読出し方法
US6762977B1 (en) * 1999-09-13 2004-07-13 Seagate Technology Llc Laser assisted magnetic recording apparatus and method
JP4019615B2 (ja) 2000-03-10 2007-12-12 富士ゼロックス株式会社 光磁気素子、光磁気ヘッドおよび磁気ディスク装置
JP2001332799A (ja) * 2000-05-19 2001-11-30 Rohm Co Ltd モールド型半導体レーザ
US6717893B1 (en) * 2000-10-04 2004-04-06 Dphi Acquisitions, Inc. Laser thermal management system
US6629077B1 (en) 2000-11-22 2003-09-30 Universal Electronics Inc. Universal remote control adapted to receive voice input
JP2004264339A (ja) * 2003-01-30 2004-09-24 Sony Corp 光導波路および光送受信モジュール
US7869309B2 (en) * 2005-08-11 2011-01-11 Seagate Technology Llc Dual wire integrated WAMR/HAMR writing head
US20090303858A1 (en) * 2006-05-16 2009-12-10 Konica Minolta Opto, Inc. Optical recording head, magneto-optical recording head and optical recording apparatus
JP2009037678A (ja) * 2007-07-31 2009-02-19 Nitto Denko Corp 回路付サスペンション基板
US8270257B2 (en) * 2008-01-31 2012-09-18 Hitachi Global Storage Technologies Netherlands B.V. Thermally assisted recording systems with low loss light redirection structure
US10866360B2 (en) * 2015-08-19 2020-12-15 President And Fellows Of Harvard College Broadband multifunctional efficient meta-gratings based on dielectric waveguide phase shifters

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220395A (en) * 1974-05-13 1980-09-02 Regents Of University Of California Polarization converter and circuit elements for use in optical waveguides
US4737946A (en) * 1984-09-03 1988-04-12 Omron Tateisi Electronics Co. Device for processing optical data with improved optical allignment means
JPS61188748A (ja) * 1985-02-16 1986-08-22 Brother Ind Ltd 光学ヘツド
US4779259A (en) * 1985-04-25 1988-10-18 Mitsubishi Denki Kabushiki Kaisha Optical head assembly with efficient light source coupling surface and method of construction
JP2539406B2 (ja) * 1987-02-04 1996-10-02 株式会社日立製作所 固体光ピツクアツプ
US4945525A (en) * 1987-09-04 1990-07-31 Sharp Kabushiki Kaisha Optical information processing apparatus

Also Published As

Publication number Publication date
EP0338864A3 (en) 1990-11-28
DE68910570D1 (de) 1993-12-16
EP0338864B1 (de) 1993-11-10
KR970008229B1 (ko) 1997-05-22
KR900016967A (ko) 1990-11-15
EP0338864A2 (de) 1989-10-25
US5065390A (en) 1991-11-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee