WO2008126512A1 - 光ヘッド装置、ならびにそれを用いた光学式情報記録再生装置および光学式情報記録再生方法 - Google Patents

光ヘッド装置、ならびにそれを用いた光学式情報記録再生装置および光学式情報記録再生方法 Download PDF

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Publication number
WO2008126512A1
WO2008126512A1 PCT/JP2008/053835 JP2008053835W WO2008126512A1 WO 2008126512 A1 WO2008126512 A1 WO 2008126512A1 JP 2008053835 W JP2008053835 W JP 2008053835W WO 2008126512 A1 WO2008126512 A1 WO 2008126512A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
optical element
information recording
crystal diffraction
optical
Prior art date
Application number
PCT/JP2008/053835
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 US12/593,411 priority Critical patent/US20100085860A1/en
Priority to JP2009508971A priority patent/JPWO2008126512A1/ja
Publication of WO2008126512A1 publication Critical patent/WO2008126512A1/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
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
  • Liquid Crystal (AREA)

Abstract

　半導体レーザ１からの出射光は液晶回折光学素子２ａを０次光として透過し、ディスク５に集光される。ディスク５からの反射光は液晶回折光学素子２ａで±１次回折光として回折され、光検出器６ａ、６ｂで受光される。ディスク５への情報の記録時、半導体レーザ１の側から液晶回折光学素子２ａへ入射した光が高い効率で液晶回折光学素子２ａから対物レンズ４の側へ出射される。ディスク５からの情報の再生時、対物レンズ４の側から液晶回折光学素子２ａへ入射した光がその偏光状態に依存せずに高い効率で液晶回折光学素子２ａから光検出器６ａ、６ｂの側へ出射されるように、液晶回折光学素子２ａが駆動される。
PCT/JP2008/053835 2007-03-28 2008-03-04 光ヘッド装置、ならびにそれを用いた光学式情報記録再生装置および光学式情報記録再生方法 WO2008126512A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/593,411 US20100085860A1 (en) 2007-03-28 2008-03-04 Optical head device, and optical information recording/reproducing device and optical information recording/reproducing method using the same
JP2009508971A JPWO2008126512A1 (ja) 2007-03-28 2008-03-04 光ヘッド装置、ならびにそれを用いた光学式情報記録再生装置および光学式情報記録再生方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-085276 2007-03-28
JP2007085276 2007-03-28

Publications (1)

Publication Number Publication Date
WO2008126512A1 true WO2008126512A1 (ja) 2008-10-23

Family

ID=39863670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053835 WO2008126512A1 (ja) 2007-03-28 2008-03-04 光ヘッド装置、ならびにそれを用いた光学式情報記録再生装置および光学式情報記録再生方法

Country Status (3)

Country Link
US (1) US20100085860A1 (ja)
JP (1) JPWO2008126512A1 (ja)
WO (1) WO2008126512A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9411189B2 (en) 2011-08-31 2016-08-09 Lg Chem, Ltd. Liquid crystal cell

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103309096A (zh) * 2013-06-09 2013-09-18 京东方科技集团股份有限公司 一种双层结构液晶透镜及三维显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05109111A (ja) * 1991-08-22 1993-04-30 Matsushita Electric Ind Co Ltd 光ヘツド装置
JPH0817065A (ja) * 1994-06-30 1996-01-19 Sony Corp 光ピックアップ装置
JPH11219541A (ja) * 1998-02-03 1999-08-10 Fujitsu Ltd 光ディスク用情報読み取り・書き込み装置
JP2006252638A (ja) * 2005-03-09 2006-09-21 Asahi Glass Co Ltd 偏光回折素子および光ヘッド装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4341332B2 (ja) * 2002-07-31 2009-10-07 旭硝子株式会社 光ヘッド装置
WO2006043516A1 (ja) * 2004-10-19 2006-04-27 Asahi Glass Company, Limited 液晶回折レンズ素子および光ヘッド装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05109111A (ja) * 1991-08-22 1993-04-30 Matsushita Electric Ind Co Ltd 光ヘツド装置
JPH0817065A (ja) * 1994-06-30 1996-01-19 Sony Corp 光ピックアップ装置
JPH11219541A (ja) * 1998-02-03 1999-08-10 Fujitsu Ltd 光ディスク用情報読み取り・書き込み装置
JP2006252638A (ja) * 2005-03-09 2006-09-21 Asahi Glass Co Ltd 偏光回折素子および光ヘッド装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9411189B2 (en) 2011-08-31 2016-08-09 Lg Chem, Ltd. Liquid crystal cell

Also Published As

Publication number Publication date
US20100085860A1 (en) 2010-04-08
JPWO2008126512A1 (ja) 2010-07-22

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