DE69126745D1 - Optisches Wiedergabegerät - Google Patents

Optisches Wiedergabegerät

Info

Publication number
DE69126745D1
DE69126745D1 DE69126745T DE69126745T DE69126745D1 DE 69126745 D1 DE69126745 D1 DE 69126745D1 DE 69126745 T DE69126745 T DE 69126745T DE 69126745 T DE69126745 T DE 69126745T DE 69126745 D1 DE69126745 D1 DE 69126745D1
Authority
DE
Germany
Prior art keywords
disk
optical
photosensors
magnetooptical
reflection
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
DE69126745T
Other languages
English (en)
Other versions
DE69126745T2 (de
Inventor
Noriyoshi Horie
Tatsuo Ohgaki
Hayami Hosokawa
Masami Tada
Tsukasa Yamashita
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.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
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 JP2204367A external-priority patent/JPH0488305A/ja
Priority claimed from JP25007990A external-priority patent/JPH04176040A/ja
Priority claimed from JP3074196A external-priority patent/JPH04286746A/ja
Priority claimed from JP3074195A external-priority patent/JPH04286745A/ja
Application filed by Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of DE69126745D1 publication Critical patent/DE69126745D1/de
Application granted granted Critical
Publication of DE69126745T2 publication Critical patent/DE69126745T2/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
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • 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
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1359—Single prisms

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Communication System (AREA)
  • Glass Compositions (AREA)
  • Optical Integrated Circuits (AREA)
  • Wire Bonding (AREA)
  • Led Device Packages (AREA)
DE69126745T 1990-07-31 1991-07-30 Optisches Wiedergabegerät Expired - Fee Related DE69126745T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP20145090 1990-07-31
JP2204367A JPH0488305A (ja) 1990-07-31 1990-07-31 光ピックアップ装置
JP25007990A JPH04176040A (ja) 1990-07-31 1990-09-21 光ピックアップ装置
JP3074196A JPH04286746A (ja) 1991-03-15 1991-03-15 光ピックアップ装置
JP3074195A JPH04286745A (ja) 1991-03-15 1991-03-15 光ピックアップ装置

Publications (2)

Publication Number Publication Date
DE69126745D1 true DE69126745D1 (de) 1997-08-14
DE69126745T2 DE69126745T2 (de) 1998-02-26

Family

ID=27524492

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69126745T Expired - Fee Related DE69126745T2 (de) 1990-07-31 1991-07-30 Optisches Wiedergabegerät

Country Status (3)

Country Link
EP (1) EP0469552B1 (de)
AT (1) ATE155275T1 (de)
DE (1) DE69126745T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5410468A (en) * 1992-06-26 1995-04-25 Matsushita Electric Industrial Co., Ltd. Optical pick-up apparatus
DE69318770T2 (de) * 1992-07-30 1998-10-15 Matsushita Electric Ind Co Ltd Optisches Wiedergabegerät
JPH06195728A (ja) * 1992-12-24 1994-07-15 Matsushita Electric Ind Co Ltd 光学ヘッド
JP3635523B2 (ja) * 1999-02-03 2005-04-06 パイオニア株式会社 光導波路素子及び光ピックアップ
US7171080B2 (en) 2004-11-15 2007-01-30 Seagate Technology Llc Coupling grating for focusing light within a waveguide for heat assisted magnetic recording

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174008B1 (de) * 1984-09-03 1992-05-20 Omron Tateisi Electronics Co. Vorrichtung zur Verarbeitung optischer Daten
JPH0622065B2 (ja) * 1987-02-25 1994-03-23 株式会社日立製作所 集積型光ヘツド

Also Published As

Publication number Publication date
EP0469552B1 (de) 1997-07-09
EP0469552A2 (de) 1992-02-05
EP0469552A3 (en) 1993-01-13
DE69126745T2 (de) 1998-02-26
ATE155275T1 (de) 1997-07-15

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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