DE69026601T2 - Optische abtasteinheit und optisches wiedergabegerät - Google Patents

Optische abtasteinheit und optisches wiedergabegerät

Info

Publication number
DE69026601T2
DE69026601T2 DE69026601T DE69026601T DE69026601T2 DE 69026601 T2 DE69026601 T2 DE 69026601T2 DE 69026601 T DE69026601 T DE 69026601T DE 69026601 T DE69026601 T DE 69026601T DE 69026601 T2 DE69026601 T2 DE 69026601T2
Authority
DE
Germany
Prior art keywords
optical
player
scanner
optical scanner
optical player
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
DE69026601T
Other languages
English (en)
Other versions
DE69026601D1 (de
Inventor
Atsushi Fukumoto
Michio Oka
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
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE69026601D1 publication Critical patent/DE69026601D1/de
Publication of DE69026601T2 publication Critical patent/DE69026601T2/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
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • 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
    • 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
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—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
    • G11B7/135—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
    • 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
    • G11B7/1395—Beam splitters or combiners

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE69026601T 1989-11-16 1990-11-15 Optische abtasteinheit und optisches wiedergabegerät Expired - Fee Related DE69026601T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1298615A JPH03157843A (ja) 1989-11-16 1989-11-16 光学ピックアップ装置
PCT/JP1990/001492 WO1991007749A1 (en) 1989-11-16 1990-11-15 Optical pickup device and magnetooptical reproducing apparatus

Publications (2)

Publication Number Publication Date
DE69026601D1 DE69026601D1 (de) 1996-05-23
DE69026601T2 true DE69026601T2 (de) 1996-10-10

Family

ID=17862022

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69026601T Expired - Fee Related DE69026601T2 (de) 1989-11-16 1990-11-15 Optische abtasteinheit und optisches wiedergabegerät

Country Status (6)

Country Link
US (1) US5394381A (de)
EP (1) EP0453576B1 (de)
JP (1) JPH03157843A (de)
KR (1) KR920701959A (de)
DE (1) DE69026601T2 (de)
WO (1) WO1991007749A1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3173839B2 (ja) * 1992-01-17 2001-06-04 パイオニア株式会社 記録媒体用情報再生装置及び再生方法
JP3095194B2 (ja) * 1992-02-05 2000-10-03 キヤノン株式会社 光磁気情報再生装置
US5448536A (en) * 1992-06-16 1995-09-05 Hitachi, Ltd. Magneto-optical recording device having an optical head capable of generating a circularly polarized light beam
JP3238497B2 (ja) * 1992-11-12 2001-12-17 松下電器産業株式会社 光ピックアップヘッド装置
US5550798A (en) * 1993-04-13 1996-08-27 Sony Corporation Enhanced optical beam splitter to increase the kerr rotation angle
US5508992A (en) * 1993-09-29 1996-04-16 Tdk Corporation Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston prism
NL1001647C2 (nl) * 1994-11-16 1997-10-21 Nec Corp Herschrijfbare optische-schijfinrichting.
GB2300749A (en) * 1995-05-06 1996-11-13 Thomson Multimedia Sa A multiple beam optical disk system
JPH11110808A (ja) * 1997-10-06 1999-04-23 Fujitsu Ltd 光学的情報記憶装置
JP2000057647A (ja) * 1998-08-07 2000-02-25 Sony Corp 光磁気記録媒体
KR100322599B1 (ko) * 1998-12-23 2002-03-08 윤종용 광픽업장치
KR20000050986A (ko) * 1999-01-16 2000-08-05 구자홍 광정보 재생장치
JP4223769B2 (ja) * 2002-08-30 2009-02-12 富士通株式会社 測定装置
US20040090874A1 (en) * 2002-11-08 2004-05-13 Kunjithapatham Balasubramanian Apparatus and method for effective reduction of a laser beam spot size
WO2004059627A1 (en) 2002-12-30 2004-07-15 Koninklijke Philips Electronics N.V. Birefringent optical component
EP2141699A1 (de) * 2008-06-30 2010-01-06 Deutsche Thomson OHG Vorrichtung zum Lesen von einem optischen Aufzeichnungsmedium
JP6513619B2 (ja) * 2016-09-28 2019-05-15 Ckd株式会社 三次元計測装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186248A (en) * 1981-05-09 1982-11-16 Ricoh Co Ltd Vertically thermomagnetic recording and reproducing system
JPS58196640A (ja) * 1982-05-12 1983-11-16 Olympus Optical Co Ltd 磁気光学記録再生装置
JPS61220154A (ja) * 1985-03-26 1986-09-30 Seiko Epson Corp 光磁気記録装置
DE3787033T2 (de) * 1986-01-08 1993-12-09 Victor Company Of Japan Optische Aufnahme und/oder Wiedergabe von Informationssignalen.
US5043960A (en) * 1987-09-25 1991-08-27 Hitachi, Ltd. Overwritable magneto-optic recording and reproducing apparatus
DE3787285T2 (de) * 1987-10-19 1994-03-31 Philips Nv Optischer Aufbau mit einer phasenstarr gekoppelten Laserdiodenzeile.
JP2846342B2 (ja) * 1989-06-07 1999-01-13 株式会社日立製作所 高密度光再生装置
JP2710675B2 (ja) * 1989-10-30 1998-02-10 株式会社日本コンラックス 光学情報記録再生用光ヘッド

Also Published As

Publication number Publication date
EP0453576A4 (en) 1992-08-12
KR920701959A (ko) 1992-08-12
DE69026601D1 (de) 1996-05-23
US5394381A (en) 1995-02-28
EP0453576A1 (de) 1991-10-30
EP0453576B1 (de) 1996-04-17
JPH03157843A (ja) 1991-07-05
WO1991007749A1 (en) 1991-05-30

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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