DE60325406D1 - Doppelwellenlängenlichtquelleneinheit und optische kopfeinrichtung - Google Patents

Doppelwellenlängenlichtquelleneinheit und optische kopfeinrichtung

Info

Publication number
DE60325406D1
DE60325406D1 DE60325406T DE60325406T DE60325406D1 DE 60325406 D1 DE60325406 D1 DE 60325406D1 DE 60325406 T DE60325406 T DE 60325406T DE 60325406 T DE60325406 T DE 60325406T DE 60325406 D1 DE60325406 D1 DE 60325406D1
Authority
DE
Germany
Prior art keywords
lambda
light beam
light source
double
wavelength
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.)
Expired - Lifetime
Application number
DE60325406T
Other languages
English (en)
Inventor
R Murakami
Y Ooi
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.)
AGC Inc
Original Assignee
Asahi Glass 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Application granted granted Critical
Publication of DE60325406D1 publication Critical patent/DE60325406D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/125—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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
    • G02B5/1823—Plural gratings positioned on the same surface, e.g. array of gratings in an overlapping or superposed manner
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/203—Filters having holographic or diffractive 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • 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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Optical Couplings Of Light Guides (AREA)
DE60325406T 2002-11-13 2003-11-12 Doppelwellenlängenlichtquelleneinheit und optische kopfeinrichtung Expired - Lifetime DE60325406D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002329724 2002-11-13
PCT/JP2003/014386 WO2004044905A1 (ja) 2002-11-13 2003-11-12 ２波長光源ユニットおよび光ヘッド装置

Publications (1)

Publication Number Publication Date
DE60325406D1 true DE60325406D1 (de) 2009-01-29

Family

ID=32310577

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60325406T Expired - Lifetime DE60325406D1 (de) 2002-11-13 2003-11-12 Doppelwellenlängenlichtquelleneinheit und optische kopfeinrichtung

Country Status (8)

Country Link
EP (1) EP1562186B1 (de)
JP (1) JPWO2004044905A1 (de)
KR (1) KR100985422B1 (de)
CN (1) CN1329895C (de)
AT (1) ATE418140T1 (de)
AU (1) AU2003280751A1 (de)
DE (1) DE60325406D1 (de)
WO (1) WO2004044905A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7356341B2 (en) * 2003-12-04 2008-04-08 Qualcomm, Incorporated Scheduling communications in a wireless network
JP4412065B2 (ja) 2004-06-14 2010-02-10 日本電気株式会社 光ヘッド装置及び光学式情報記録再生装置
EP1826752A1 (de) * 2006-02-27 2007-08-29 Deutsche Thomson-Brandt Gmbh Holographisches Speichermedium
US8467643B2 (en) * 2010-08-13 2013-06-18 Toyota Motor Engineering & Mfg. North America, Inc. Optical device using double-groove grating
JP5496258B2 (ja) * 2012-06-11 2014-05-21 キヤノン株式会社 積層型回折光学素子および光学系
US11194080B2 (en) * 2019-07-08 2021-12-07 Samsung Electronics Co., Ltd. Diffractive optical element and device

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3036314U (ja) * 1996-09-30 1997-04-15 三洋電機株式会社 光再生装置
US6072579A (en) * 1998-08-27 2000-06-06 Ricoh Company, Ltd. Optical pickup apparatus having improved holographic optical element and photodetector
JP3459777B2 (ja) * 1998-08-31 2003-10-27 シャープ株式会社 光ピックアップ装置
JP3511913B2 (ja) * 1998-10-19 2004-03-29 日本ビクター株式会社 光ピックアップ及び光デバイス
JP2000123403A (ja) * 1998-10-19 2000-04-28 Victor Co Of Japan Ltd 光ピックアップ及び光デバイス
KR20000066666A (ko) * 1999-04-20 2000-11-15 윤종용 디브이디-램의 재생이 가능한 디브이디-롬 광학계
JP2001216677A (ja) * 2000-01-28 2001-08-10 Hitachi Ltd 光ピックアップおよびそれを用いた情報再生装置または情報記録再生装置
EP1184848B1 (de) * 2000-08-09 2005-05-11 Ricoh Company, Ltd. Optisches Abtastgerät mit einer verbesserten holographischen Einheit und optisches Plattengerät dies enthaltend
JP4345256B2 (ja) * 2001-02-14 2009-10-14 旭硝子株式会社 波長選択性回折素子および光ヘッド装置
JP2002288854A (ja) * 2001-03-23 2002-10-04 Ricoh Co Ltd 光ピックアップ装置
JP4537616B2 (ja) * 2001-05-18 2010-09-01 株式会社リコー 光ピックアップ装置及び光ディスクドライブ装置
JP2003338076A (ja) * 2002-03-14 2003-11-28 Ricoh Co Ltd 光ピックアップ装置、偏光光学素子の製造方法及び光ディスク装置
AU2003263538A1 (en) * 2002-10-02 2004-04-23 Koninklijke Philips Electronics N.V. Optical scanning device with two three-spot gratings

Also Published As

Publication number Publication date
CN1329895C (zh) 2007-08-01
ATE418140T1 (de) 2009-01-15
CN1711596A (zh) 2005-12-21
EP1562186A4 (de) 2006-07-26
AU2003280751A1 (en) 2004-06-03
EP1562186B1 (de) 2008-12-17
KR100985422B1 (ko) 2010-10-05
EP1562186A1 (de) 2005-08-10
JPWO2004044905A1 (ja) 2006-03-16
WO2004044905A1 (ja) 2004-05-27
KR20050084914A (ko) 2005-08-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition