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WO2008105281A1 - 光ヘッド装置及び光学式情報記録再生装置 - Google Patents

光ヘッド装置及び光学式情報記録再生装置 Download PDF

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Publication number
WO2008105281A1
WO2008105281A1 PCT/JP2008/052800 JP2008052800W WO2008105281A1 WO 2008105281 A1 WO2008105281 A1 WO 2008105281A1 JP 2008052800 W JP2008052800 W JP 2008052800W WO 2008105281 A1 WO2008105281 A1 WO 2008105281A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
coma aberration
objective lens
lens
optical axis
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.)
Ceased
Application number
PCT/JP2008/052800
Other languages
English (en)
French (fr)
Inventor
Ryuichi Katayama
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.)
NEC Corp
Original Assignee
NEC Corp
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 Corp filed Critical NEC Corp
Priority to JP2009501192A priority Critical patent/JPWO2008105281A1/ja
Priority to US12/449,551 priority patent/US20100061216A1/en
Publication of WO2008105281A1 publication Critical patent/WO2008105281A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • G11B7/12—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
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
    • G11B7/13927—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness
    • 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
    • G11B7/1372—Lenses
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
    • 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
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Landscapes

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

Abstract

　光ヘッド装置（１００）は、対物レンズ（１０６）よりも光源側に、対物レンズへの入射光の像高を変化させる光学手段を有し、光学手段は凹レンズ（１１１）及び凸レンズ（１１２）を含む。対物レンズ（１０６）は、入射光の光軸が所定方向に傾いたときに、所定の極性のコマ収差が発生するように設計されている。ディスク（１０７）が傾いたときには、凸レンズ（１１２）を光軸に垂直な面内で移動して対物レンズ（１０６）への入射光の像高を変化させて、凹レンズ（１１１）への入射光の光軸に対して凸レンズ（１１２）からの出射光の光軸を傾ける。対物レンズ（１０６）が、ディスク（１０７）の傾きに起因するコマ収差と逆極性のコマ収差を発生するので、傾きに起因するコマ収差を打ち消す。
PCT/JP2008/052800 2007-02-28 2008-02-20 光ヘッド装置及び光学式情報記録再生装置 Ceased WO2008105281A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009501192A JPWO2008105281A1 (ja) 2007-02-28 2008-02-20 光ヘッド装置及び光学式情報記録再生装置
US12/449,551 US20100061216A1 (en) 2007-02-28 2008-02-20 Optical head unit and optcal information recording/reproducing apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-048608 2007-02-28
JP2007048608 2007-02-28

Publications (1)

Publication Number Publication Date
WO2008105281A1 true WO2008105281A1 (ja) 2008-09-04

Family

ID=39721116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/052800 Ceased WO2008105281A1 (ja) 2007-02-28 2008-02-20 光ヘッド装置及び光学式情報記録再生装置

Country Status (3)

Country Link
US (1) US20100061216A1 (ja)
JP (1) JPWO2008105281A1 (ja)
WO (1) WO2008105281A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2010087010A1 (ja) * 2009-01-30 2012-07-26 パイオニア株式会社 光ピックアップの調整方法及び光記録再生装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12131510B2 (en) * 2021-09-28 2024-10-29 Himax Technologies Limited Object detection system capable of compensating varying light intensity

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07192289A (ja) * 1993-11-18 1995-07-28 Sony Corp 光ピツクアツプ装置
JPH11238246A (ja) * 1998-02-19 1999-08-31 Kenwood Corp 光ピックアップ装置
JP2003067969A (ja) * 2001-08-27 2003-03-07 Olympus Optical Co Ltd 光ピックアップ
WO2006006381A1 (ja) * 2004-07-13 2006-01-19 Konica Minolta Opto, Inc. 光ピックアップ装置
JP2006302367A (ja) * 2005-04-19 2006-11-02 Ricoh Co Ltd 光ピックアップ、調整方法及び光情報処理装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3538520B2 (ja) * 1997-04-16 2004-06-14 パイオニア株式会社 収差補正用液晶パネル、光ピックアップ及び情報再生装置
US6097691A (en) * 1997-09-05 2000-08-01 Asahi Glass Company Ltd. Optical device for recording or reading data to an optical disk
US6597519B2 (en) * 2001-04-26 2003-07-22 Konica Corporation Objective lens, optical pick-up apparatus and optical information recording reproducing apparatus
JP4743118B2 (ja) * 2004-07-21 2011-08-10 コニカミノルタオプト株式会社 光ピックアップ装置の組立方法及び光ピックアップ装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07192289A (ja) * 1993-11-18 1995-07-28 Sony Corp 光ピツクアツプ装置
JPH11238246A (ja) * 1998-02-19 1999-08-31 Kenwood Corp 光ピックアップ装置
JP2003067969A (ja) * 2001-08-27 2003-03-07 Olympus Optical Co Ltd 光ピックアップ
WO2006006381A1 (ja) * 2004-07-13 2006-01-19 Konica Minolta Opto, Inc. 光ピックアップ装置
JP2006302367A (ja) * 2005-04-19 2006-11-02 Ricoh Co Ltd 光ピックアップ、調整方法及び光情報処理装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2010087010A1 (ja) * 2009-01-30 2012-07-26 パイオニア株式会社 光ピックアップの調整方法及び光記録再生装置

Also Published As

Publication number Publication date
US20100061216A1 (en) 2010-03-11
JPWO2008105281A1 (ja) 2010-06-03

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