WO2009050940A1 - 抽出光学系およびそれを備える光ヘッド装置 - Google Patents

抽出光学系およびそれを備える光ヘッド装置 Download PDF

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Publication number
WO2009050940A1
WO2009050940A1 PCT/JP2008/064969 JP2008064969W WO2009050940A1 WO 2009050940 A1 WO2009050940 A1 WO 2009050940A1 JP 2008064969 W JP2008064969 W JP 2008064969W WO 2009050940 A1 WO2009050940 A1 WO 2009050940A1
Authority
WO
WIPO (PCT)
Prior art keywords
light beam
focal line
phase
device including
head device
Prior art date
Application number
PCT/JP2008/064969
Other languages
English (en)
French (fr)
Inventor
Kenya Nakai
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to JP2009537985A priority Critical patent/JP4964306B2/ja
Priority to DE112008002743T priority patent/DE112008002743T5/de
Priority to US12/738,549 priority patent/US8014257B2/en
Priority to CN200880111993A priority patent/CN101828226A/zh
Publication of WO2009050940A1 publication Critical patent/WO2009050940A1/ja

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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
    • G11B7/1365—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
    • G11B7/13—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
    • 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
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • 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
    • 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

Abstract

　本発明は、簡易な構成で信号光と迷光とを分離抽出できる抽出光学系およびそれを備える光ヘッド装置を提供することを目的とする。位相板２０ａおよび位相板２１ａは＋λ／４位相板であり、位相板２０ｂおよび位相板２１ｂは－λ／４位相板である。焦線Ｆｉ＿Ｌ０は迷光Ｒｓ＿Ｌ０の焦線、焦線Ｆｉ＿Ｌ１は再生光Ｒ＿Ｌ１の焦線、焦線Ｆｉ＿Ｌ２は迷光Ｒｓ＿Ｌ２の焦線をそれぞれ示している。再生光Ｒ＿Ｌ１の全光束は、位相素子２１の透過後には偏光方向が９０度だけ回転した状態となる。迷光Ｒｓ＿Ｌ０，Ｒｓ＿Ｌ２の全光束は、再生光Ｒ＿Ｌ１の全光束とは異なり、位相素子２１の透過後にも偏光方向が回転しない。
PCT/JP2008/064969 2007-10-18 2008-08-22 抽出光学系およびそれを備える光ヘッド装置 WO2009050940A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2009537985A JP4964306B2 (ja) 2007-10-18 2008-08-22 光ヘッド装置
DE112008002743T DE112008002743T5 (de) 2007-10-18 2008-08-22 Optisches Extraktionssystem und dieselbe einschliessende optische Kopfvorrichtung
US12/738,549 US8014257B2 (en) 2007-10-18 2008-08-22 Extraction optical system and optical head device including the same
CN200880111993A CN101828226A (zh) 2007-10-18 2008-08-22 提取光学系统以及具有该提取光学系统的光学头装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-270923 2007-10-18
JP2007270923 2007-10-18

Publications (1)

Publication Number Publication Date
WO2009050940A1 true WO2009050940A1 (ja) 2009-04-23

Family

ID=40567217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/064969 WO2009050940A1 (ja) 2007-10-18 2008-08-22 抽出光学系およびそれを備える光ヘッド装置

Country Status (5)

Country Link
US (1) US8014257B2 (ja)
JP (1) JP4964306B2 (ja)
CN (1) CN101828226A (ja)
DE (1) DE112008002743T5 (ja)
WO (1) WO2009050940A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009301644A (ja) * 2008-06-13 2009-12-24 Hitachi Media Electoronics Co Ltd 光ピックアップ装置
CN102347034A (zh) * 2010-07-28 2012-02-08 日立民用电子株式会社 光信息记录再现装置和再现装置
US20120201114A1 (en) * 2009-10-21 2012-08-09 Kousei Sano Optical pickup, optical recording/reproducing device, computer, optical disk recorder, and minute spot forming method
JP2013016242A (ja) * 2011-07-06 2013-01-24 Tdk Corp 光学ドライブ装置
WO2014045411A1 (ja) * 2012-09-21 2014-03-27 株式会社 東芝 情報記録再生装置および情報記録再生方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010192044A (ja) * 2009-02-19 2010-09-02 Sanyo Electric Co Ltd 光ピックアップ装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004113974A1 (ja) * 2003-06-25 2004-12-29 Photonic Lattice Inc. 偏光子および偏光分離素子
JP2006252716A (ja) * 2005-03-14 2006-09-21 Ricoh Co Ltd 抽出光学系、光ピックアップ装置及び光ディスク装置
JP2006252599A (ja) * 2005-03-08 2006-09-21 Mitsubishi Electric Corp 光学装置及びそれを用いた光デイスク装置
JP2006344344A (ja) * 2005-03-02 2006-12-21 Ricoh Co Ltd 抽出光学系、光ピックアップ装置及び光ディスク装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4557281B2 (ja) 2004-02-16 2010-10-06 株式会社リコー 光ピックアップ装置及び光ディスク装置
WO2006093326A1 (en) * 2005-03-02 2006-09-08 Ricoh Company, Ltd. Optical system, optical pickup apparatus, and optical disk apparatus
US20070053563A1 (en) 2005-03-09 2007-03-08 Zhuowen Tu Probabilistic boosting tree framework for learning discriminative models
JP4592528B2 (ja) * 2005-08-04 2010-12-01 三洋電機株式会社 光検出装置、光ピックアップ装置
JP2007080480A (ja) * 2005-08-15 2007-03-29 Sony Corp 光分別方法、光分別構造体とこれを用いた光ピックアップ装置及び光記録再生装置
JP4618725B2 (ja) 2005-11-08 2011-01-26 株式会社リコー 光ピックアップ装置及び光ディスク装置
JP2007328838A (ja) * 2006-06-06 2007-12-20 Sony Corp 光ピックアップ及び光ディスク装置
JP2009020945A (ja) * 2007-07-11 2009-01-29 Hitachi Media Electoronics Co Ltd 光ピックアップ装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004113974A1 (ja) * 2003-06-25 2004-12-29 Photonic Lattice Inc. 偏光子および偏光分離素子
JP2006344344A (ja) * 2005-03-02 2006-12-21 Ricoh Co Ltd 抽出光学系、光ピックアップ装置及び光ディスク装置
JP2006252599A (ja) * 2005-03-08 2006-09-21 Mitsubishi Electric Corp 光学装置及びそれを用いた光デイスク装置
JP2006252716A (ja) * 2005-03-14 2006-09-21 Ricoh Co Ltd 抽出光学系、光ピックアップ装置及び光ディスク装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009301644A (ja) * 2008-06-13 2009-12-24 Hitachi Media Electoronics Co Ltd 光ピックアップ装置
US8107348B2 (en) * 2008-06-13 2012-01-31 Hitachi Media Electronics Co., Ltd. Optical pickup apparatus for use on a multi-layered optical information storage medium
US20120201114A1 (en) * 2009-10-21 2012-08-09 Kousei Sano Optical pickup, optical recording/reproducing device, computer, optical disk recorder, and minute spot forming method
CN102347034A (zh) * 2010-07-28 2012-02-08 日立民用电子株式会社 光信息记录再现装置和再现装置
CN102347034B (zh) * 2010-07-28 2015-01-28 日立民用电子株式会社 光信息记录再现装置和再现装置
JP2013016242A (ja) * 2011-07-06 2013-01-24 Tdk Corp 光学ドライブ装置
WO2014045411A1 (ja) * 2012-09-21 2014-03-27 株式会社 東芝 情報記録再生装置および情報記録再生方法

Also Published As

Publication number Publication date
US20100214903A1 (en) 2010-08-26
US8014257B2 (en) 2011-09-06
DE112008002743T5 (de) 2010-07-22
CN101828226A (zh) 2010-09-08
JPWO2009050940A1 (ja) 2011-02-24
JP4964306B2 (ja) 2012-06-27

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