DE69902953D1 - Optischer Kopf - Google Patents

Optischer Kopf

Info

Publication number
DE69902953D1
DE69902953D1 DE69902953T DE69902953T DE69902953D1 DE 69902953 D1 DE69902953 D1 DE 69902953D1 DE 69902953 T DE69902953 T DE 69902953T DE 69902953 T DE69902953 T DE 69902953T DE 69902953 D1 DE69902953 D1 DE 69902953D1
Authority
DE
Germany
Prior art keywords
optical head
optical
head
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
DE69902953T
Other languages
English (en)
Inventor
Takeshi Shimano
Shigeru Nakamura
Kunikazu Ohnishi
Masayuki Inoue
Yukio Fukui
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of DE69902953D1 publication Critical patent/DE69902953D1/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
    • 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
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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
    • G11B7/1367—Stepped phase 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Optical Recording Or Reproduction (AREA)
DE69902953T 1998-02-16 1999-02-12 Optischer Kopf Expired - Lifetime DE69902953D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3255998 1998-02-16

Publications (1)

Publication Number Publication Date
DE69902953D1 true DE69902953D1 (de) 2002-10-24

Family

ID=12362277

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69902953T Expired - Lifetime DE69902953D1 (de) 1998-02-16 1999-02-12 Optischer Kopf

Country Status (7)

Country Link
US (3) US6400664B1 (de)
EP (2) EP0936603B1 (de)
KR (1) KR19990072586A (de)
CN (2) CN1122986C (de)
DE (1) DE69902953D1 (de)
SG (1) SG97779A1 (de)
TW (1) TW444201B (de)

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US6657931B1 (en) * 1959-02-02 2003-12-02 Sony Corporation Optical disc drive for performing read/write operations on optical disks
US7082006B1 (en) * 1999-08-10 2006-07-25 Storage Technology Corporation Compact optical tracking system for magnetic tape
JP4035933B2 (ja) * 1999-11-30 2008-01-23 ソニー株式会社 光ピックアップおよび記録再生装置
JP3988343B2 (ja) * 1999-12-28 2007-10-10 ソニー株式会社 光学ピックアップ装置、光ディスク装置及びトラック判別信号検出方法
DE60129178T2 (de) * 2000-02-10 2008-03-13 Sony Corp. Optisches Abtastgerät, Neigungserkennungsvorrichtung, Neigungserkennungsverfahren, und optisches Plattengerät
JP2001256670A (ja) * 2000-03-10 2001-09-21 Sony Corp 光学ピックアップ装置及び光ディスク装置
TW514892B (en) * 2000-04-14 2002-12-21 Koninkl Philips Electronics Nv Device and method
CN1235205C (zh) * 2000-06-26 2006-01-04 松下电器产业株式会社 光学头
JP2002163830A (ja) * 2000-11-24 2002-06-07 Toshiba Corp 光学的収差を利用した光情報処理システムおよび厚みムラのある透明層で保護された記録層を持つ情報媒体
KR100754158B1 (ko) 2000-12-08 2007-09-03 삼성전자주식회사 구면수차 검출 및/또는 보정 가능한 광픽업장치
JP3672020B2 (ja) * 2000-12-18 2005-07-13 日本電気株式会社 光ヘッド装置及び光学式情報記録再生装置
KR100408401B1 (ko) * 2001-02-23 2003-12-06 삼성전자주식회사 광 기록/재생기기 및 트랙킹 에러신호 검출방법
KR20020072214A (ko) * 2001-03-09 2002-09-14 소니 가부시끼 가이샤 광디스크장치 및 광디스크장치를 위한 제어방법
JP2002319151A (ja) * 2001-04-24 2002-10-31 Sharp Corp 光ピックアップ装置
JP2003045051A (ja) * 2001-07-31 2003-02-14 Pioneer Electronic Corp 情報記録再生装置
US20030090970A1 (en) * 2001-11-12 2003-05-15 Matsushita Electric Industrial Co., Ltd. Optical head and optical disk device
US20030147331A1 (en) * 2002-02-07 2003-08-07 G-Bond Optoelectronics, Inc. Optical pickup diffracting one of two laser beams to a single detector
JP3831279B2 (ja) * 2002-03-18 2006-10-11 三菱電機株式会社 光ピックアップ装置の製造方法および光ピックアップ装置
EP1516321A1 (de) * 2002-06-12 2005-03-23 Koninklijke Philips Electronics N.V. Optische abtastvorrichtung
US8656004B1 (en) 2002-07-10 2014-02-18 At&T Intellectual Property Ii, L.P. Method and apparatus for delivering selected multimedia content to a user in pervasive computing environments
JP3799318B2 (ja) * 2002-10-22 2006-07-19 株式会社日立製作所 光ピックアップおよびそれを用いた光学的情報記録装置または再生装置
US7630305B2 (en) * 2003-07-29 2009-12-08 Orbital Data Corporation TCP selective acknowledgements for communicating delivered and missed data packets
JP4098139B2 (ja) * 2003-04-03 2008-06-11 シャープ株式会社 光ピックアップ
WO2004097815A1 (ja) * 2003-04-25 2004-11-11 Nec Corporation 光ヘッド装置及び光学式情報記録再生装置
ATE393955T1 (de) * 2003-05-16 2008-05-15 Thomson Licensing Gerät zum lesen und/oder beschreiben optischer aufzeichnungsträger
JP2005025897A (ja) * 2003-07-04 2005-01-27 Victor Co Of Japan Ltd 光ピックアップ装置
JP4148866B2 (ja) * 2003-09-30 2008-09-10 三洋電機株式会社 光ディスク装置
JP3984970B2 (ja) * 2004-04-01 2007-10-03 株式会社日立メディアエレクトロニクス 光ディスク装置、情報再生方法または記録方法
JP4158114B2 (ja) * 2004-07-06 2008-10-01 ソニー株式会社 光ピックアップ及びディスクドライブ装置
US7355931B2 (en) * 2004-08-10 2008-04-08 Lsi Logic Corporation Optical disc center error amplitude calibration
JP2006146979A (ja) * 2004-11-16 2006-06-08 Tdk Corp 光ヘッドの焦点ズレ誤差信号検出方法及びそれを用いた光ヘッド並びに光記録再生装置
US7821899B2 (en) * 2005-07-22 2010-10-26 Pioneer Corporation Optical pickup device
US7911890B2 (en) * 2005-09-14 2011-03-22 Panasonic Corporation Optical disk unit
US20070242575A1 (en) * 2006-04-17 2007-10-18 Toshiteru Nakamura Optical Pickup and Optical Disc Apparatus
JP4630844B2 (ja) * 2006-05-29 2011-02-09 パナソニック株式会社 光ピックアップ装置
JP2008130167A (ja) * 2006-11-21 2008-06-05 Sanyo Electric Co Ltd 光ピックアップ装置
EP1950752A1 (de) * 2007-01-24 2008-07-30 Deutsche Thomson OHG Phasenänderungsgitter für differenzierte Druck-Zug-Verfolgung
EP1950753A1 (de) * 2007-01-24 2008-07-30 Thomson Licensing S.A. Phasenänderungsgitter für differenzierte Druck-Zug-Verfolgung
JP4400661B2 (ja) * 2007-09-04 2010-01-20 船井電機株式会社 光ディスク装置
JP5172852B2 (ja) * 2007-10-04 2013-03-27 パナソニック株式会社 光ヘッド装置、光情報装置および回折素子
JP2009158042A (ja) * 2007-12-27 2009-07-16 Panasonic Corp 光ピックアップ装置及び光検出器
JP5142879B2 (ja) 2008-08-06 2013-02-13 株式会社日立メディアエレクトロニクス 光ピックアップおよび光ディスク装置
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JP4605483B2 (ja) * 2008-12-16 2011-01-05 ソニー株式会社 光集積素子、光検出方法、光ピックアップ及び光ディスク装置
JP2012238367A (ja) * 2011-05-13 2012-12-06 Hitachi Media Electoronics Co Ltd 光学ヘッド、光学ドライブ装置

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Also Published As

Publication number Publication date
CN1226725A (zh) 1999-08-25
EP1220213A1 (de) 2002-07-03
CN1122986C (zh) 2003-10-01
KR19990072586A (ko) 1999-09-27
US6400664B1 (en) 2002-06-04
CN1252700C (zh) 2006-04-19
CN1448926A (zh) 2003-10-15
EP0936603B1 (de) 2002-09-18
EP0936603A3 (de) 1999-10-06
US6728173B2 (en) 2004-04-27
SG97779A1 (en) 2003-08-20
US6934228B2 (en) 2005-08-23
US20020150008A1 (en) 2002-10-17
TW444201B (en) 2001-07-01
US20040196771A1 (en) 2004-10-07
EP0936603A2 (de) 1999-08-18

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