DE69632445D1 - Optische Abtastvorrichtung mit zwei Objektivlinsen - Google Patents

Optische Abtastvorrichtung mit zwei Objektivlinsen

Info

Publication number
DE69632445D1
DE69632445D1 DE69632445T DE69632445T DE69632445D1 DE 69632445 D1 DE69632445 D1 DE 69632445D1 DE 69632445 T DE69632445 T DE 69632445T DE 69632445 T DE69632445 T DE 69632445T DE 69632445 D1 DE69632445 D1 DE 69632445D1
Authority
DE
Germany
Prior art keywords
scanning device
optical scanning
objective lenses
lenses
objective
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 - Lifetime
Application number
DE69632445T
Other languages
English (en)
Inventor
Yoshihiro Sekimoto
Yasuo Nakata
Nobuo Ogata
Tomoyuki Miyake
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE69632445D1 publication Critical patent/DE69632445D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • 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
    • G11B7/135—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
    • 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
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
    • 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
    • G11B7/139—Numerical aperture control means
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
DE69632445T 1995-11-29 1996-11-29 Optische Abtastvorrichtung mit zwei Objektivlinsen Expired - Lifetime DE69632445D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31144095 1995-11-29

Publications (1)

Publication Number Publication Date
DE69632445D1 true DE69632445D1 (de) 2004-06-17

Family

ID=18017247

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69632445T Expired - Lifetime DE69632445D1 (de) 1995-11-29 1996-11-29 Optische Abtastvorrichtung mit zwei Objektivlinsen

Country Status (3)

Country Link
US (1) US5673247A (de)
EP (1) EP0777222B1 (de)
DE (1) DE69632445D1 (de)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773538B1 (de) * 1995-11-10 2003-05-02 Kabushiki Kaisha Toshiba Antriebsvorrichtung für Objektivlinse
JPH09180240A (ja) * 1995-12-21 1997-07-11 Hitachi Ltd 光ヘッド
JP3048912B2 (ja) * 1996-02-06 2000-06-05 日本電気株式会社 光ヘッド装置
US6016301A (en) * 1996-04-01 2000-01-18 Sony Corporation Optical pickup device and optical disc reproducing apparatus
WO1997042632A1 (fr) * 1996-05-09 1997-11-13 Sony Corporation Tete de lecture optique et lecteur de disque
JP3476995B2 (ja) * 1996-05-09 2003-12-10 パイオニア株式会社 光ピックアップ装置及びディスクプレーヤ
US6266313B1 (en) * 1996-12-20 2001-07-24 Pioneer Electronic Corporation Optical pickup for recording or reproducing system
KR100245666B1 (ko) * 1996-12-30 2000-02-15 전주범 와이어구동형 광 픽업장치
CN1134773C (zh) * 1997-04-24 2004-01-14 三洋电机株式会社 光拾取装置
JP3845982B2 (ja) 1997-10-17 2006-11-15 ソニー株式会社 光ピックアップ装置
JP3480810B2 (ja) * 1998-06-16 2003-12-22 富士通株式会社 光学的情報記憶装置
JP3662751B2 (ja) * 1998-11-18 2005-06-22 日本電気株式会社 光ヘッド装置
EP1095374A1 (de) * 1999-05-07 2001-05-02 Koninklijke Philips Electronics N.V. Optische abtastvorrichtung mit einer gebogenen antriebsspule
US6549504B2 (en) 1999-06-04 2003-04-15 Industrial Technology Research Institute Dual optical pickup head for accessing both DVD and CD disc
US7458086B2 (en) 2001-12-01 2008-11-25 Samsung Electronics Co., Ltd. Actuator used with an optical pickup
KR100636127B1 (ko) 2001-12-01 2006-10-19 삼성전자주식회사 광픽업용 액츄에이터
US20040252619A1 (en) * 2003-06-16 2004-12-16 Samsung Electronics Co., Ltd. Slim optical pickup
JP2005276312A (ja) * 2004-03-24 2005-10-06 Pioneer Electronic Corp 光ピックアップ、および、情報処理装置
TWI254293B (en) * 2004-07-02 2006-05-01 Ind Tech Res Inst Optical read-write head
US7486592B2 (en) * 2004-07-02 2009-02-03 Industrial Technology Research Institute Optical head having dual optical paths
KR20060003176A (ko) * 2004-07-05 2006-01-10 삼성전자주식회사 광픽업 및 이를 채용한 광 기록 및/또는 재생기기
JP4476722B2 (ja) * 2004-07-13 2010-06-09 パイオニア株式会社 レンズ駆動装置
JP2006164372A (ja) * 2004-12-06 2006-06-22 Sony Corp 光ピックアップ及び光ディスク装置
KR100710753B1 (ko) * 2004-12-22 2007-04-24 삼성전자주식회사 광픽업용 액츄에이터 및 광기록 및/또는 재생장치
KR100710756B1 (ko) * 2004-12-22 2007-04-24 삼성전자주식회사 광픽업용 액츄에이터 및 광기록 및/또는 재생장치
KR100680178B1 (ko) 2005-01-27 2007-02-08 삼성전자주식회사 광픽업 장치
JPWO2006106725A1 (ja) * 2005-03-30 2008-09-11 富士通株式会社 光ピックアップおよび光ディスク装置
US7616550B2 (en) * 2005-06-16 2009-11-10 Sanyo Electric Co., Ltd. Optical pickup unit
WO2007111034A1 (ja) * 2006-03-29 2007-10-04 Mitsubishi Electric Corporation 光学手段駆動装置
CN103339674B (zh) * 2011-01-21 2016-03-09 三菱电机株式会社 光拾取装置以及光盘装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550249A (en) * 1983-04-21 1985-10-29 At&T Bell Laboratories Optical disc read/write apparatus
JPS6316429A (ja) * 1986-07-08 1988-01-23 Fuji Electric Co Ltd 情報記録媒体用光学ヘツド装置
JPS6360451A (ja) * 1986-08-30 1988-03-16 Hikari Maeda シルクスクリ−ン印刷における写真製版法及びそれに用いる積層シ−ト
JPH0354740A (ja) * 1989-07-24 1991-03-08 Matsushita Electric Ind Co Ltd 光学情報記録部材および光学情報記録再生装置
US5235581A (en) * 1990-08-09 1993-08-10 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses
JPH05189800A (ja) * 1991-03-15 1993-07-30 Ricoh Co Ltd 光ヘッド
JPH05242521A (ja) * 1992-02-27 1993-09-21 Pioneer Electron Corp 光ディスクプレーヤ
JP2981351B2 (ja) * 1992-10-22 1999-11-22 シャープ株式会社 対物レンズ駆動装置
JP2532818B2 (ja) * 1993-02-01 1996-09-11 松下電器産業株式会社 対物レンズおよび光ヘッド装置
JPH06333255A (ja) * 1993-05-25 1994-12-02 Matsushita Electric Ind Co Ltd 光ヘッド装置

Also Published As

Publication number Publication date
EP0777222A1 (de) 1997-06-04
EP0777222B1 (de) 2004-05-12
US5673247A (en) 1997-09-30

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