WO2009048032A1 - 光学的情報記録再生装置及び光ヘッド装置 - Google Patents

光学的情報記録再生装置及び光ヘッド装置 Download PDF

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Publication number
WO2009048032A1
WO2009048032A1 PCT/JP2008/068140 JP2008068140W WO2009048032A1 WO 2009048032 A1 WO2009048032 A1 WO 2009048032A1 JP 2008068140 W JP2008068140 W JP 2008068140W WO 2009048032 A1 WO2009048032 A1 WO 2009048032A1
Authority
WO
WIPO (PCT)
Prior art keywords
function
polarized light
switching means
wavelength plate
optical disc
Prior art date
Application number
PCT/JP2008/068140
Other languages
English (en)
French (fr)
Inventor
Ryuichi Katayama
Original Assignee
Nec 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 Nec Corporation filed Critical Nec Corporation
Priority to JP2009536990A priority Critical patent/JPWO2009048032A1/ja
Publication of WO2009048032A1 publication Critical patent/WO2009048032A1/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
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Polarising Elements (AREA)
  • Holo Graphy (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

　光ディスク（２）に記録／再生光を照射する光学系が、往路の光を導く第一の偏光ビームスプリッタ（１８）よりも光ディスク側に、入射光に対して１／４波長板の機能を持つ第一のモードとその機能を持たない第二のモードとで作動可能な第一の偏光切替手段（１９）と、復路の光を導く第二の偏光ビームスプリッタ（１１）よりも光ディスク側に、入射光に対して１／２波長板の機能を持つ第三のモードとその機能を持たない第四のモードとで作動可能な第二の偏光切替手段（１２）を有する。光ディスクへの情報記録時には、第一の偏光切替手段（１９）に１／４波長板の機能を持たせず、第二の偏光切替手段（１２）に１／２波長板の機能を持たせない。一方、光ディスクからの情報再生時は、第一の偏光切替手段（１９）に１／４波長板の機能を持たせ、第二の偏光切替手段（１２）に１／２波長板の機能を持たせる。双方の偏光切替手段の機能により、光ディスクへの情報の記録時及び光ディスクからの情報の再生時に、第一及び第二の偏光ビームスプリッタにおいて光の損失が生じない。
PCT/JP2008/068140 2007-10-10 2008-10-06 光学的情報記録再生装置及び光ヘッド装置 WO2009048032A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009536990A JPWO2009048032A1 (ja) 2007-10-10 2008-10-06 光学的情報記録再生装置及び光ヘッド装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007264387 2007-10-10
JP2007-264387 2007-10-10

Publications (1)

Publication Number Publication Date
WO2009048032A1 true WO2009048032A1 (ja) 2009-04-16

Family

ID=40549176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068140 WO2009048032A1 (ja) 2007-10-10 2008-10-06 光学的情報記録再生装置及び光ヘッド装置

Country Status (2)

Country Link
JP (1) JPWO2009048032A1 (ja)
WO (1) WO2009048032A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010257496A (ja) * 2009-04-21 2010-11-11 Nec Corp 光学的情報記録再生装置及びそれに用いる光学ユニット

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004086966A (ja) * 2002-08-26 2004-03-18 Optware:Kk 光情報再生装置および光情報記録再生装置
JP2004348856A (ja) * 2003-05-22 2004-12-09 Olympus Corp 光情報記録再生装置及び方法、光情報記録媒体、光情報記録装置及び方法、並びに光情報再生装置及び方法
JP2008234693A (ja) * 2007-03-16 2008-10-02 Matsushita Electric Ind Co Ltd ホログラム記録装置およびホログラム再生装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004086966A (ja) * 2002-08-26 2004-03-18 Optware:Kk 光情報再生装置および光情報記録再生装置
JP2004348856A (ja) * 2003-05-22 2004-12-09 Olympus Corp 光情報記録再生装置及び方法、光情報記録媒体、光情報記録装置及び方法、並びに光情報再生装置及び方法
JP2008234693A (ja) * 2007-03-16 2008-10-02 Matsushita Electric Ind Co Ltd ホログラム記録装置およびホログラム再生装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010257496A (ja) * 2009-04-21 2010-11-11 Nec Corp 光学的情報記録再生装置及びそれに用いる光学ユニット

Also Published As

Publication number Publication date
JPWO2009048032A1 (ja) 2011-02-17

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