WO2008114593A1 - 光ピックアップ装置及び対物光学素子 - Google Patents

光ピックアップ装置及び対物光学素子 Download PDF

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Publication number
WO2008114593A1
WO2008114593A1 PCT/JP2008/053507 JP2008053507W WO2008114593A1 WO 2008114593 A1 WO2008114593 A1 WO 2008114593A1 JP 2008053507 W JP2008053507 W JP 2008053507W WO 2008114593 A1 WO2008114593 A1 WO 2008114593A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
region
optical element
luminous flux
objective
Prior art date
Application number
PCT/JP2008/053507
Other languages
English (en)
French (fr)
Inventor
Hideki Tanaka
Yuichi Atarashi
Kohei Ota
Kiyono Ikenaka
Original Assignee
Konica Minolta Opto, Inc.
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 Konica Minolta Opto, Inc. filed Critical Konica Minolta Opto, Inc.
Priority to JP2009505115A priority Critical patent/JPWO2008114593A1/ja
Publication of WO2008114593A1 publication Critical patent/WO2008114593A1/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
    • G11B7/1367—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
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • 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

Landscapes

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

Abstract

　複雑な機構を用いることなく、低コストで、同一の光束を用いるＢＤとＨＤの一つの対物光学素子での互換を可能とする光ピックアップ装置及び対物光学素子を提供するため、波長λ１（３８０ｎｍ＜λ１＜４５０ｎｍ）の第１光束を出射する第１光源と、第１光束を光ディスクの情報記録面上に集光させるための対物光学素子を有する集光光学系を有する光ピックアップ装置において、対物光学素子は、少なくとも、光軸を含む第１領域と、第１領域の周囲の第２領域とに分割され、第１領域を通過した前記第１光束は第１光ディスク及び第２光ディスクの記録及び／又は再生に用いられ、第２領域を通過した第１光束は第１光ディスクの記録及び／又は再生に用いられ、集光光学系は、対物光学素子の前記第１領域に相当する領域に補正面を有し、補正面は、段差によって光軸を中心とする同心円状の複数の領域に分割されている。
PCT/JP2008/053507 2007-03-19 2008-02-28 光ピックアップ装置及び対物光学素子 WO2008114593A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009505115A JPWO2008114593A1 (ja) 2007-03-19 2008-02-28 光ピックアップ装置及び対物光学素子

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2007-069842 2007-03-19
JP2007069842 2007-03-19
JP2007-182778 2007-07-12
JP2007182778 2007-07-12
JP2007265109 2007-10-11
JP2007-265109 2007-10-11

Publications (1)

Publication Number Publication Date
WO2008114593A1 true WO2008114593A1 (ja) 2008-09-25

Family

ID=39765703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053507 WO2008114593A1 (ja) 2007-03-19 2008-02-28 光ピックアップ装置及び対物光学素子

Country Status (2)

Country Link
JP (1) JPWO2008114593A1 (ja)
WO (1) WO2008114593A1 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006216141A (ja) * 2005-02-02 2006-08-17 Konica Minolta Opto Inc 光ピックアップ装置
JP2006286140A (ja) * 2005-04-04 2006-10-19 Ricoh Co Ltd 光ピックアップおよび光情報処理装置
JP2007317348A (ja) * 2006-04-26 2007-12-06 Ricoh Co Ltd 光ピックアップおよび光情報処理装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006216141A (ja) * 2005-02-02 2006-08-17 Konica Minolta Opto Inc 光ピックアップ装置
JP2006286140A (ja) * 2005-04-04 2006-10-19 Ricoh Co Ltd 光ピックアップおよび光情報処理装置
JP2007317348A (ja) * 2006-04-26 2007-12-06 Ricoh Co Ltd 光ピックアップおよび光情報処理装置

Also Published As

Publication number Publication date
JPWO2008114593A1 (ja) 2010-07-01

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