ATE155275T1 - Optisches wiedergabegerät - Google Patents

Optisches wiedergabegerät

Info

Publication number
ATE155275T1
ATE155275T1 AT91112802T AT91112802T ATE155275T1 AT E155275 T1 ATE155275 T1 AT E155275T1 AT 91112802 T AT91112802 T AT 91112802T AT 91112802 T AT91112802 T AT 91112802T AT E155275 T1 ATE155275 T1 AT E155275T1
Authority
AT
Austria
Prior art keywords
disk
optical
photosensors
magnetooptical
reflection
Prior art date
Application number
AT91112802T
Other languages
English (en)
Inventor
Noriyoshi Horie
Tatsuo Ohgaki
Hayami Hosokawa
Masami Tada
Tsukasa Yamashita
Original Assignee
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 Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Application granted granted Critical
Publication of ATE155275T1 publication Critical patent/ATE155275T1/de

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)
  • Led Device Packages (AREA)
  • Wire Bonding (AREA)
AT91112802T 1990-07-31 1991-07-30 Optisches wiedergabegerät ATE155275T1 (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 (1)

Publication Number Publication Date
ATE155275T1 true ATE155275T1 (de) 1997-07-15

Family

ID=27524492

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91112802T ATE155275T1 (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
DE3586076D1 (de) * 1984-09-03 1992-06-25 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
DE69126745T2 (de) 1998-02-26
EP0469552A3 (en) 1993-01-13
DE69126745D1 (de) 1997-08-14
EP0469552A2 (de) 1992-02-05

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