WO2008132891A1 - 光ヘッド装置および光学式情報記録再生装置 - Google Patents

光ヘッド装置および光学式情報記録再生装置 Download PDF

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Publication number
WO2008132891A1
WO2008132891A1 PCT/JP2008/055116 JP2008055116W WO2008132891A1 WO 2008132891 A1 WO2008132891 A1 WO 2008132891A1 JP 2008055116 W JP2008055116 W JP 2008055116W WO 2008132891 A1 WO2008132891 A1 WO 2008132891A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
optical
light
disc
sub
Prior art date
Application number
PCT/JP2008/055116
Other languages
English (en)
French (fr)
Inventor
Ryuichi Katayama
Original Assignee
Nec Corporation
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 Nec Corporation filed Critical Nec Corporation
Priority to JP2009511710A priority Critical patent/JP5120667B2/ja
Publication of WO2008132891A1 publication Critical patent/WO2008132891A1/ja

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
    • 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
    • G11B7/12—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

Abstract

　半導体レーザ１からの出射光は回折光学素子３によりメインビームおよび２つのサブビームに分割され、ディスク７の記録層に集光される。ディスク７の記録層で反射されたメインビームの反射光および２つのサブビームの反射光は位相フィルタ１１を透過し、光検出器１０で受光される。位相フィルタ１１は、光軸を通りディスク７の情報トラックの方向に対応する直線で隔てられた第一の領域と第二の領域とを有し、第一の領域を透過する光と第二の領域を透過する光との間に１８０°の位相差を与える。光検出器１０からの出力に基づいて差動プッシュプル信号が演算される。
PCT/JP2008/055116 2007-04-20 2008-03-19 光ヘッド装置および光学式情報記録再生装置 WO2008132891A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009511710A JP5120667B2 (ja) 2007-04-20 2008-03-19 光ヘッド装置および光学式情報記録再生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-112390 2007-04-20
JP2007112390 2007-04-20

Publications (1)

Publication Number Publication Date
WO2008132891A1 true WO2008132891A1 (ja) 2008-11-06

Family

ID=39925356

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/055116 WO2008132891A1 (ja) 2007-04-20 2008-03-19 光ヘッド装置および光学式情報記録再生装置

Country Status (2)

Country Link
JP (1) JP5120667B2 (ja)
WO (1) WO2008132891A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009087423A (ja) * 2007-09-28 2009-04-23 Sony Optiarc Inc 光ピックアップ装置、光記録媒体駆動装置及び信号の記録／再生方法
JP2009223937A (ja) * 2008-03-14 2009-10-01 Ricoh Co Ltd 光ピックアップおよびこれを用いる光情報処理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005063595A (ja) * 2003-08-18 2005-03-10 Sony Corp 光ピックアップ及びディスクドライブ装置
JP2005203090A (ja) * 2004-01-14 2005-07-28 Samsung Electronics Co Ltd 光ピックアップ
JP2007257750A (ja) * 2006-03-24 2007-10-04 Hitachi Media Electoronics Co Ltd 光ピックアップおよび光ディスク装置
JP2008021339A (ja) * 2006-07-10 2008-01-31 Pioneer Electronic Corp 光ピックアップ及び情報機器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8068403B2 (en) * 2005-10-14 2011-11-29 Panasonic Corporation Optical head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005063595A (ja) * 2003-08-18 2005-03-10 Sony Corp 光ピックアップ及びディスクドライブ装置
JP2005203090A (ja) * 2004-01-14 2005-07-28 Samsung Electronics Co Ltd 光ピックアップ
JP2007257750A (ja) * 2006-03-24 2007-10-04 Hitachi Media Electoronics Co Ltd 光ピックアップおよび光ディスク装置
JP2008021339A (ja) * 2006-07-10 2008-01-31 Pioneer Electronic Corp 光ピックアップ及び情報機器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009087423A (ja) * 2007-09-28 2009-04-23 Sony Optiarc Inc 光ピックアップ装置、光記録媒体駆動装置及び信号の記録／再生方法
US8059504B2 (en) 2007-09-28 2011-11-15 Sony Nec Optiarc Inc. Optical pickup apparatus, optical recording medium driving apparatus, and signal recording/reproducing method
JP2009223937A (ja) * 2008-03-14 2009-10-01 Ricoh Co Ltd 光ピックアップおよびこれを用いる光情報処理装置

Also Published As

Publication number Publication date
JP5120667B2 (ja) 2013-01-16
JPWO2008132891A1 (ja) 2010-07-22

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