SG97779A1 - Optical head - Google Patents

Optical head

Info

Publication number
SG97779A1
SG97779A1 SG9900585A SG1999000585A SG97779A1 SG 97779 A1 SG97779 A1 SG 97779A1 SG 9900585 A SG9900585 A SG 9900585A SG 1999000585 A SG1999000585 A SG 1999000585A SG 97779 A1 SG97779 A1 SG 97779A1
Authority
SG
Singapore
Prior art keywords
optical head
optical
head
Prior art date
Application number
SG9900585A
Other languages
English (en)
Inventor
Shimano Takeshi
Nakamura Shigeru
Ohnishi Kunikazu
Inoue Masayuki
Fukui Yukio
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
Publication of SG97779A1 publication Critical patent/SG97779A1/en

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)
SG9900585A 1998-02-16 1999-02-12 Optical head SG97779A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
SG97779A1 true SG97779A1 (en) 2003-08-20

Family

ID=12362277

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9900585A SG97779A1 (en) 1998-02-16 1999-02-12 Optical head

Country Status (7)

Country Link
US (3) US6400664B1 (fr)
EP (2) EP1220213A1 (fr)
KR (1) KR19990072586A (fr)
CN (2) CN1122986C (fr)
DE (1) DE69902953D1 (fr)
SG (1) SG97779A1 (fr)
TW (1) TW444201B (fr)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US7304920B2 (en) 2000-06-26 2007-12-04 Matsushita Electric Industrial Co., Ltd. Optical head that detects tilt in an optical disk
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
AU2003241094A1 (en) * 2002-06-12 2003-12-31 Koninklijke Philips Electronics N.V. Optical scanning device
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
US7136344B2 (en) * 2003-04-25 2006-11-14 Nec Corporation Optical head device and optical information recording/reproducing apparatus
JP2006529045A (ja) * 2003-05-16 2006-12-28 トムソン ライセンシング 光記憶媒体からの読み出し及び／又は該光記憶媒体への書き込みのための装置
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
JPWO2007032381A1 (ja) * 2005-09-14 2009-03-19 パナソニック株式会社 光ディスク装置
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 (fr) * 2007-01-24 2008-07-30 Deutsche Thomson OHG Réseau de décalage de phase pour suivi push-pull différentiel du décalage de phase
EP1950753A1 (fr) * 2007-01-24 2008-07-30 Thomson Licensing S.A. Réseau de décalage de phase pour suivi push-pull différentiel du décalage de phase
JP4400661B2 (ja) * 2007-09-04 2010-01-20 船井電機株式会社 光ディスク装置
US8259554B2 (en) * 2007-10-04 2012-09-04 Panasonic Corporation Optical head device, optical information device, and diffractive element
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
TW201009525A (en) * 2008-08-18 2010-03-01 Ind Tech Res Inst Laser marking method and laser marking system
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4750162A (en) * 1985-07-16 1988-06-07 Victor Company Of Japan, Ltd. Optical tracking system utilizing three photo-detectors
US5090004A (en) * 1989-07-21 1992-02-18 Sony Corporation Tracking system for optical recording and/or reproducing apparatus employing a main light beam and a plurality of auxiliary light beams
US5159589A (en) * 1989-06-01 1992-10-27 Sony Corporation Optical recording and/or reproducing apparatus

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742218A (en) * 1985-03-11 1988-05-03 Hitachi, Ltd. Focus error detection apparatus utilizing focusing an front and rear sides of focal planes
JPH056575Y2 (fr) * 1986-04-18 1993-02-19
CA1319194C (fr) 1986-07-28 1993-06-15 Hideaki Satou Detecteur d'erreurs a focalisation et dispositif de lecture de donnees optique incorporant ce detecteur
US4970710A (en) * 1987-07-29 1990-11-13 Laser Magnetic Storage International Company Method and apparatus for focus and tracking in an optical disk system
JPH0296618A (ja) 1988-10-03 1990-04-09 Tokico Ltd タービン式流量計
JPH02247830A (ja) * 1989-03-20 1990-10-03 Pioneer Electron Corp サーボループのループゲイン設定方法
JPH0453036A (ja) * 1990-06-20 1992-02-20 Hitachi Maxell Ltd 光学情報記録再生装置
JPH04168631A (ja) * 1990-10-31 1992-06-16 Mitsubishi Electric Corp 光ピックアップ装置
US5173598A (en) 1991-05-10 1992-12-22 U.S. Philips Corporation Optical scanning beam position control system which is free of modulation by tracking error
JPH0568774A (ja) 1991-09-12 1993-03-23 Toshiba Corp 洗濯機
DE4140806A1 (de) * 1991-12-11 1993-06-17 Thomson Brandt Gmbh Optische abtastvorrichtung
JPH05242512A (ja) * 1991-12-19 1993-09-21 Matsushita Electric Ind Co Ltd 光ディスク装置
JPH05197980A (ja) 1992-01-17 1993-08-06 Konica Corp 光ヘッド装置
ATE168491T1 (de) * 1992-08-12 1998-08-15 Koninkl Philips Electronics Nv Einrichtung zur optischen abtastung einer oberfläche
JP2875689B2 (ja) 1992-08-20 1999-03-31 三菱電機株式会社 光ディスク装置の焦点制御方法
JPH06111344A (ja) * 1992-09-30 1994-04-22 Pioneer Electron Corp 光ピックアップ装置
JP2884960B2 (ja) 1992-11-25 1999-04-19 株式会社日立製作所 光学ヘッドおよびそれを用いた光学的情報装置
JP3618769B2 (ja) * 1992-12-01 2005-02-09 キヤノン株式会社 光学式情報記録再生装置
JPH06309687A (ja) 1993-04-28 1994-11-04 Hitachi Ltd 光学ヘッド及びその光学ヘッドを使用した光学的情報記録再生装置
JPH07225963A (ja) * 1994-02-15 1995-08-22 Matsushita Electric Ind Co Ltd トラックエラー信号自動調整装置
JPH08279166A (ja) 1995-03-31 1996-10-22 Ricoh Co Ltd 光ピックアップ装置
US5764619A (en) * 1995-04-07 1998-06-09 Matsushita Electric Industrial Co., Ltd. Optical recording medium having two separate recording layers
JP3410869B2 (ja) * 1995-04-11 2003-05-26 株式会社リコー 光ピックアップ装置
JPH0916972A (ja) * 1995-06-28 1997-01-17 Nikon Corp 情報再生装置及び情報再生方法
JPH0935284A (ja) * 1995-07-17 1997-02-07 Fujitsu Ltd 光ディスク装置
CN1075222C (zh) * 1995-07-27 2001-11-21 松下电器产业株式会社 光盘装置
JP3549301B2 (ja) * 1995-09-08 2004-08-04 三菱電機株式会社 光ヘッドのトラッキング誤差検出装置
JP3420404B2 (ja) * 1995-09-19 2003-06-23 キヤノン株式会社 光学的情報記録装置
JPH09180240A (ja) * 1995-12-21 1997-07-11 Hitachi Ltd 光ヘッド
JP3066795B2 (ja) 1996-06-14 2000-07-17 株式会社リコー 光ディスク装置および信号生成方法、光ディスク
US5828634A (en) 1996-02-22 1998-10-27 Ricoh Company, Ltd. Optical disk tracking method and device for producing a tracking error signal and a track crossing signal
DE19630887A1 (de) * 1996-07-31 1998-02-05 Thomson Brandt Gmbh Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger
US6125087A (en) * 1996-11-07 2000-09-26 Hitachi, Ltd. Optical pickup for optical disk apparatus
US6104689A (en) * 1997-07-22 2000-08-15 Asahi Kogaku Kogyo Kabushiki Kaisha Sensor system for optical disc drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4750162A (en) * 1985-07-16 1988-06-07 Victor Company Of Japan, Ltd. Optical tracking system utilizing three photo-detectors
US5159589A (en) * 1989-06-01 1992-10-27 Sony Corporation Optical recording and/or reproducing apparatus
US5090004A (en) * 1989-07-21 1992-02-18 Sony Corporation Tracking system for optical recording and/or reproducing apparatus employing a main light beam and a plurality of auxiliary light beams

Also Published As

Publication number Publication date
US6400664B1 (en) 2002-06-04
KR19990072586A (ko) 1999-09-27
US20040196771A1 (en) 2004-10-07
US6728173B2 (en) 2004-04-27
EP0936603A3 (fr) 1999-10-06
US6934228B2 (en) 2005-08-23
EP0936603B1 (fr) 2002-09-18
TW444201B (en) 2001-07-01
US20020150008A1 (en) 2002-10-17
DE69902953D1 (de) 2002-10-24
EP1220213A1 (fr) 2002-07-03
CN1252700C (zh) 2006-04-19
CN1226725A (zh) 1999-08-25
CN1448926A (zh) 2003-10-15
EP0936603A2 (fr) 1999-08-18
CN1122986C (zh) 2003-10-01

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