WO2008093439A1 - 光ピックアップ装置 - Google Patents

光ピックアップ装置 Download PDF

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Publication number
WO2008093439A1
WO2008093439A1 PCT/JP2007/064172 JP2007064172W WO2008093439A1 WO 2008093439 A1 WO2008093439 A1 WO 2008093439A1 JP 2007064172 W JP2007064172 W JP 2007064172W WO 2008093439 A1 WO2008093439 A1 WO 2008093439A1
Authority
WO
WIPO (PCT)
Prior art keywords
blocks
sub
area
phases
degrees
Prior art date
Application number
PCT/JP2007/064172
Other languages
English (en)
French (fr)
Inventor
Naoto Shimada
Hiroaki Yamamoto
Naoki Nakanishi
Masahiko Nishimoto
Takuya Okuda
Original Assignee
Panasonic 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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to KR1020087020582A priority Critical patent/KR20090105795A/ko
Priority to US12/090,563 priority patent/US7940631B2/en
Publication of WO2008093439A1 publication Critical patent/WO2008093439A1/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
    • G11B7/12—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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

【解決手段】光ピックアップ装置は、出射光ビームを少なくとも３本の光ビームに分岐する回折格子１２を備えている。回折格子１２は、光情報記録媒体のトラックの接線に対して平行な第１方向の分割線Ｄ１及びＤ２により３つの領域に分割されている。第２の領域１２Ｂは、第１方向の分割線Ｄ３と第１方向と交差する第２方向の分割線Ｄ４とにより４つのサブブロックに分割され、対角に配置されたサブブロック同士は位相が互いに等しく、隣接するサブブロック同士は位相が略１８０度異なり、第１の領域１２Ａと第２の領域１２Ｂの各サブブロックとは位相が略９０度異なり、第１の領域１２Ａと第３の領域１２Ｃとは位相が略１８０度異なる。
PCT/JP2007/064172 2007-02-01 2007-07-18 光ピックアップ装置 WO2008093439A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020087020582A KR20090105795A (ko) 2007-02-01 2007-07-18 광 픽업장치
US12/090,563 US7940631B2 (en) 2007-02-01 2007-07-18 Optical pickup device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-022603 2007-02-01
JP2007022603A JP4444977B2 (ja) 2007-02-01 2007-02-01 光ピックアップ装置

Publications (1)

Publication Number Publication Date
WO2008093439A1 true WO2008093439A1 (ja) 2008-08-07

Family

ID=39673755

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/064172 WO2008093439A1 (ja) 2007-02-01 2007-07-18 光ピックアップ装置

Country Status (6)

Country Link
US (1) US7940631B2 (ja)
JP (1) JP4444977B2 (ja)
KR (1) KR20090105795A (ja)
CN (1) CN101356578A (ja)
TW (1) TW200834568A (ja)
WO (1) WO2008093439A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014111559A1 (fr) 2013-01-21 2014-07-24 bioMérieux Moyen, procede et produit-programme d'ordinateur pour determiner le taux de concentration de micro-organismes lors d'une analyse de fluide

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4800277B2 (ja) * 2006-09-07 2011-10-26 パナソニック株式会社 光学ヘッドおよび光ディスク装置
JP5178339B2 (ja) * 2008-06-20 2013-04-10 三洋電機株式会社 光ピックアップ装置
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
TW201021039A (en) 2008-10-30 2010-06-01 Sanyo Electric Co Optical pickup device and optical disc device equipped with same
CN106019440B (zh) * 2016-07-25 2018-08-21 华中科技大学 一种偏振衍射光栅结构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004145915A (ja) * 2002-10-22 2004-05-20 Hitachi Ltd 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
JP2005353187A (ja) * 2004-06-11 2005-12-22 Nec Corp 光ヘッド装置及び光学式情報記録再生装置
JP2006228304A (ja) * 2005-02-16 2006-08-31 Sanyo Electric Co Ltd トラッキング制御装置
JP2007035193A (ja) * 2005-07-28 2007-02-08 Sharp Corp 光ピックアップ装置
JP2007042252A (ja) * 2005-06-29 2007-02-15 Enplas Corp 光学素子および光ピックアップ装置ならびに光学的情報記録および／または再生装置
JP2007122779A (ja) * 2005-10-25 2007-05-17 Sony Corp 光ピックアップ及び光ディスク装置
JP2007141425A (ja) * 2005-10-17 2007-06-07 Sanyo Electric Co Ltd 光ピックアップ装置および光ディスク装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6194246A (ja) 1984-10-15 1986-05-13 Sony Corp 光学式ヘッドのトラッキング誤差検出方法
JPH0434212A (ja) 1990-05-31 1992-02-05 Ntn Corp 複列内向き円錐ころ軸受
TW501116B (en) * 2000-07-05 2002-09-01 Matsushita Electric Ind Co Ltd Optical device, optical semiconductor device, and optical information processor comprising them
JP4106072B1 (ja) 2006-12-18 2008-06-25 松下電器産業株式会社 光ピックアップ装置
JP4444947B2 (ja) * 2006-12-18 2010-03-31 パナソニック株式会社 光ピックアップ装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004145915A (ja) * 2002-10-22 2004-05-20 Hitachi Ltd 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
JP2005353187A (ja) * 2004-06-11 2005-12-22 Nec Corp 光ヘッド装置及び光学式情報記録再生装置
JP2006228304A (ja) * 2005-02-16 2006-08-31 Sanyo Electric Co Ltd トラッキング制御装置
JP2007042252A (ja) * 2005-06-29 2007-02-15 Enplas Corp 光学素子および光ピックアップ装置ならびに光学的情報記録および／または再生装置
JP2007035193A (ja) * 2005-07-28 2007-02-08 Sharp Corp 光ピックアップ装置
JP2007141425A (ja) * 2005-10-17 2007-06-07 Sanyo Electric Co Ltd 光ピックアップ装置および光ディスク装置
JP2007122779A (ja) * 2005-10-25 2007-05-17 Sony Corp 光ピックアップ及び光ディスク装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014111559A1 (fr) 2013-01-21 2014-07-24 bioMérieux Moyen, procede et produit-programme d'ordinateur pour determiner le taux de concentration de micro-organismes lors d'une analyse de fluide
US10465225B2 (en) 2013-01-21 2019-11-05 Biomerieux Means, method and computer program product for determining the concentration level of microorganisms during a fluid analysis
US10655159B2 (en) 2013-01-21 2020-05-19 Biomerieux Means, method and computer program product for determining the concentration level of microorganisms during a fluid analysis

Also Published As

Publication number Publication date
KR20090105795A (ko) 2009-10-07
CN101356578A (zh) 2009-01-28
US20100157778A1 (en) 2010-06-24
TW200834568A (en) 2008-08-16
US7940631B2 (en) 2011-05-10
JP2008192199A (ja) 2008-08-21
JP4444977B2 (ja) 2010-03-31

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