WO2008099622A1 - 光ピックアップ装置 - Google Patents

光ピックアップ装置 Download PDF

Info

Publication number
WO2008099622A1
WO2008099622A1 PCT/JP2008/050123 JP2008050123W WO2008099622A1 WO 2008099622 A1 WO2008099622 A1 WO 2008099622A1 JP 2008050123 W JP2008050123 W JP 2008050123W WO 2008099622 A1 WO2008099622 A1 WO 2008099622A1
Authority
WO
WIPO (PCT)
Prior art keywords
objective lens
light flux
optical
collimator
pickup device
Prior art date
Application number
PCT/JP2008/050123
Other languages
English (en)
French (fr)
Inventor
Yuichi Atarashi
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 JP2008558015A priority Critical patent/JPWO2008099622A1/ja
Publication of WO2008099622A1 publication Critical patent/WO2008099622A1/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
    • 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
    • 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
    • G11B7/1376—Collimator 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)

Abstract

　光情報記録媒体への情報の再生、記録を、一対の対物光学素子への入射光束径を確保できる光学系によって好適に達成するための光ピックアップ装置を提供するために、第１半導体レーザ６１Ａから射出された光束の発散倍率を変換する第１コリメータ３２と、第２半導体レーザ６１Ｂから射出された光束の発散倍率を変換する第２コリメータ３３と、第１コリメータ３２から射出された光束を入射させるべき第１対物レンズ部１２と、第２コリメータ３３から射出された光束を入射させるべき第２対物レンズ部１３とを有する対物部１０とを備え、第１コリメータ３２と第２コリメータ３３との光軸間距離を、第１対物レンズ部と第２対物レンズ部の光軸間距離よりも長くした。これにより、両対物レンズ部１２、１３への入射光束径を大きく確保することができる。
PCT/JP2008/050123 2007-02-14 2008-01-09 光ピックアップ装置 WO2008099622A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008558015A JPWO2008099622A1 (ja) 2007-02-14 2008-01-09 光ピックアップ装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-033310 2007-02-14
JP2007033310 2007-02-14

Publications (1)

Publication Number Publication Date
WO2008099622A1 true WO2008099622A1 (ja) 2008-08-21

Family

ID=39689868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/050123 WO2008099622A1 (ja) 2007-02-14 2008-01-09 光ピックアップ装置

Country Status (2)

Country Link
JP (1) JPWO2008099622A1 (ja)
WO (1) WO2008099622A1 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH076401A (ja) * 1993-12-15 1995-01-10 Seiko Epson Corp 光学的書き込み読み取り装置
JPH08315408A (ja) * 1995-05-17 1996-11-29 Sanyo Electric Co Ltd 光学式情報記録または再生装置
JP2006172610A (ja) * 2004-12-16 2006-06-29 Sony Corp 光ピックアップ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH076401A (ja) * 1993-12-15 1995-01-10 Seiko Epson Corp 光学的書き込み読み取り装置
JPH08315408A (ja) * 1995-05-17 1996-11-29 Sanyo Electric Co Ltd 光学式情報記録または再生装置
JP2006172610A (ja) * 2004-12-16 2006-06-29 Sony Corp 光ピックアップ装置

Also Published As

Publication number Publication date
JPWO2008099622A1 (ja) 2010-05-27

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