[go: up one dir, main page]

WO2009072472A1 - 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
WO2009072472A1
WO2009072472A1 PCT/JP2008/071813 JP2008071813W WO2009072472A1 WO 2009072472 A1 WO2009072472 A1 WO 2009072472A1 JP 2008071813 W JP2008071813 W JP 2008071813W WO 2009072472 A1 WO2009072472 A1 WO 2009072472A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarization
laser beam
light
route
pickup device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2008/071813
Other languages
English (en)
French (fr)
Inventor
Kenji Nagatomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Publication of WO2009072472A1 publication Critical patent/WO2009072472A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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

【課題】２つの対物レンズを経由した各ディスクからの反射光を光検出器の受光面上に適正に収束させ得る光ピックアップ装置を提供する。 【解決手段】複屈折素子１５は、偏光ビームスプリッタ１４からＨＤ用対物レンズ２１に向かう際（往路）のレーザ光の偏光方向（Ｐ偏光）と、ＨＤ用対物レンズ２１から偏光ビームスプリッタ１４に向かう際（復路）のレーザ光の偏光方向（Ｓ偏光）とで屈折率が相違する。このため、往路と復路とで、レーザ光の光路に光路差ΔＬが生じる。この光路差ΔＬが、ＨＤからの反射光の収束位置のずれ量ΔＬｐｄに一致する複屈折素子１５をガラス板４０に替えて配置することにより、ＨＤからの反射光を光検出器２８の受光面上に適正に収束させることができる。
PCT/JP2008/071813 2007-12-07 2008-12-01 光ピックアップ装置 Ceased WO2009072472A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-317567 2007-12-07
JP2007317567 2007-12-07

Publications (1)

Publication Number Publication Date
WO2009072472A1 true WO2009072472A1 (ja) 2009-06-11

Family

ID=40717652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/071813 Ceased WO2009072472A1 (ja) 2007-12-07 2008-12-01 光ピックアップ装置

Country Status (1)

Country Link
WO (1) WO2009072472A1 (ja)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006112249A1 (ja) * 2005-04-15 2006-10-26 Pioneer Corporation 光ピックアップ装置及び情報記録再生装置
JP2007004875A (ja) * 2005-06-22 2007-01-11 Sony Corp 光ピックアップ
JP2008021358A (ja) * 2006-07-12 2008-01-31 Sanyo Electric Co Ltd 光ピックアップ装置
JP2008257797A (ja) * 2007-04-05 2008-10-23 Konica Minolta Opto Inc 光ピックアップ装置及び光ディスク装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006112249A1 (ja) * 2005-04-15 2006-10-26 Pioneer Corporation 光ピックアップ装置及び情報記録再生装置
JP2007004875A (ja) * 2005-06-22 2007-01-11 Sony Corp 光ピックアップ
JP2008021358A (ja) * 2006-07-12 2008-01-31 Sanyo Electric Co Ltd 光ピックアップ装置
JP2008257797A (ja) * 2007-04-05 2008-10-23 Konica Minolta Opto Inc 光ピックアップ装置及び光ディスク装置

Similar Documents

Publication Publication Date Title
WO2008081859A1 (ja) 光ピックアップ、光ディスク装置、複合カップリングレンズ、複合プリズム、及び光情報機器
MY148058A (en) Photonic crystal security device
WO2012100209A3 (en) Multi-laser transmitter optical subassemblies for optoelectronic modules
ATE356366T1 (de) Binokulares fernglas mit integriertem laser- entfernungsmesser
WO2008136254A1 (ja) 光ピックアップ装置用の対物レンズ及び光ピックアップ装置
WO2009146059A3 (en) Pick-up head assembly for optical disc employing electrically tunable liquid crystal lens
WO2009072472A1 (ja) 光ピックアップ装置
EP1605449A3 (en) Optical pickup apparatus
TW200735079A (en) Optical pickup and optical disc apparatus
TW200641864A (en) Objective lens, optical pickup apparatus and optical information recording and/or reproducing apparatus
WO2008139686A1 (ja) 光ピックアップ装置、光ディスク装置
TW200943287A (en) A micro type optical reading device
WO2008096590A1 (ja) 光ヘッド装置および光学式情報記録再生装置
TW200500633A (en) Converging optical system of optical pickup device
TW200614214A (en) Optical disc apparatus
TW200710841A (en) Compatible optical pickup and optical recording and/or reproducing apparatus employing the same
TW200703297A (en) Objective optical element for optical pickup device, optical element for optical pickup device, objective optical element unit for optical pickup device and optical pickup device
WO2009078250A1 (ja) 光ピックアップ装置
TW200842862A (en) Optical pickup device
WO2009069583A1 (ja) 光ピックアップ装置
TWI256633B (en) Optical component set used in pick up head
WO2009078291A1 (ja) 光ピックアップ装置
DE602008005432D1 (de) Optische Lesekopfvorrichtung mit zwei Stellantrieben
TW200615927A (en) Optical pickup device
WO2008108138A1 (ja) 光ヘッド装置および光学式情報記録再生装置ならびに光学式情報記録再生方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08856558

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08856558

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP