WO2009078291A1 - 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
WO2009078291A1
WO2009078291A1 PCT/JP2008/072128 JP2008072128W WO2009078291A1 WO 2009078291 A1 WO2009078291 A1 WO 2009078291A1 JP 2008072128 W JP2008072128 W JP 2008072128W WO 2009078291 A1 WO2009078291 A1 WO 2009078291A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser light
light
max
beam splitter
respect
Prior art date
Application number
PCT/JP2008/072128
Other languages
English (en)
French (fr)
Inventor
Yoshiyuki Ogawa
Tomokazu Taguchi
Kazuyuki Nishi
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 JP2009546218A priority Critical patent/JPWO2009078291A1/ja
Publication of WO2009078291A1 publication Critical patent/WO2009078291A1/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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • 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
    • G11B7/1395—Beam splitters or combiners

Landscapes

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

Abstract

　本発明は、光学記録媒体に対するレーザー光の往路と復路との分離を行うビームスプリッタが、低コストでありながら発振波長の変動に適応可能な低い波長依存性により良好な光路分離を可能にし、しかも光学記録媒体への光量と信号検出用受光素子への光量とを共に大きくすることを可能にする光ピックアップ装置を提供する。レーザー光の透過順に第１面Ｓ１と第２面Ｓ２を有する透明媒質から成る板状のビームスプリッタ４は、所定のレーザー光を光ディスク１０に向けて反射させ、光ディスク１０で反射したレーザー光を透過させる。反射時のレーザー光がビームスプリッタ４に入射する際には第１面Ｓ１に対してＳ偏光の状態にあり、条件式:θＭＡＸ-１０°≦θ≦θＭＡＸ+７°(θ:反射時のレーザー光の第１面Ｓ１に対する入射角度、θＭＡＸ:(Ｒｓ１×Ｔｐ１×Ｔｐ２)が最大となるときの第１面Ｓ１に対する入射角度)を満たす。
PCT/JP2008/072128 2007-12-14 2008-12-05 光ピックアップ装置 WO2009078291A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009546218A JPWO2009078291A1 (ja) 2007-12-14 2008-12-05 光ピックアップ装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007324038 2007-12-14
JP2007-324038 2007-12-14

Publications (1)

Publication Number Publication Date
WO2009078291A1 true WO2009078291A1 (ja) 2009-06-25

Family

ID=40795407

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/072128 WO2009078291A1 (ja) 2007-12-14 2008-12-05 光ピックアップ装置

Country Status (2)

Country Link
JP (1) JPWO2009078291A1 (ja)
WO (1) WO2009078291A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108931501A (zh) * 2017-05-23 2018-12-04 株式会社迪思科 反射率检测方法和反射率检测装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6297148A (ja) * 1985-10-24 1987-05-06 Toshiba Corp 光学的情報処理装置
JPH03252928A (ja) * 1990-02-28 1991-11-12 Sharp Corp 光ピックアップ装置
JPH07220313A (ja) * 1994-01-31 1995-08-18 Ricoh Co Ltd 光ピックアップ装置
JP2005129186A (ja) * 2003-10-27 2005-05-19 Konica Minolta Opto Inc 光ピックアップ装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3638194B2 (ja) * 1997-03-19 2005-04-13 パイオニア株式会社 光ピックアップ装置
US20070263518A1 (en) * 2004-12-14 2007-11-15 Ryuichi Katayama Optical Head Apparatus and Optical Information Recording/Reproducing Apparatus With the Same
JP2007280456A (ja) * 2006-04-04 2007-10-25 Epson Toyocom Corp 光軸合成素子及び光ピックアップ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6297148A (ja) * 1985-10-24 1987-05-06 Toshiba Corp 光学的情報処理装置
JPH03252928A (ja) * 1990-02-28 1991-11-12 Sharp Corp 光ピックアップ装置
JPH07220313A (ja) * 1994-01-31 1995-08-18 Ricoh Co Ltd 光ピックアップ装置
JP2005129186A (ja) * 2003-10-27 2005-05-19 Konica Minolta Opto Inc 光ピックアップ装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108931501A (zh) * 2017-05-23 2018-12-04 株式会社迪思科 反射率检测方法和反射率检测装置
CN108931501B (zh) * 2017-05-23 2022-06-24 株式会社迪思科 反射率检测方法和反射率检测装置

Also Published As

Publication number Publication date
JPWO2009078291A1 (ja) 2011-04-28

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