TW200415607A - Optical scanning device with two three-spot gratings - Google Patents

Optical scanning device with two three-spot gratings Download PDF

Info

Publication number
TW200415607A
TW200415607A TW92127203A TW92127203A TW200415607A TW 200415607 A TW200415607 A TW 200415607A TW 92127203 A TW92127203 A TW 92127203A TW 92127203 A TW92127203 A TW 92127203A TW 200415607 A TW200415607 A TW 200415607A
Authority
TW
Taiwan
Prior art keywords
light
scanning device
grating
optical scanning
diffractive
Prior art date
Application number
TW92127203A
Other languages
English (en)
Chinese (zh)
Inventor
Petrus Theodorus Jutte
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200415607A publication Critical patent/TW200415607A/zh

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
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • 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
TW92127203A 2002-10-02 2003-10-01 Optical scanning device with two three-spot gratings TW200415607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02079098 2002-10-02

Publications (1)

Publication Number Publication Date
TW200415607A true TW200415607A (en) 2004-08-16

Family

ID=32050050

Family Applications (1)

Application Number Title Priority Date Filing Date
TW92127203A TW200415607A (en) 2002-10-02 2003-10-01 Optical scanning device with two three-spot gratings

Country Status (3)

Country Link
AU (1) AU2003263538A1 (fr)
TW (1) TW200415607A (fr)
WO (1) WO2004032126A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE418140T1 (de) * 2002-11-13 2009-01-15 Asahi Glass Co Ltd Doppelwellenlängenlichtquelleneinheit und optische kopfeinrichtung
US7548359B2 (en) 2002-11-13 2009-06-16 Asahi Glass Company, Limited Double-wavelength light source unit and optical head device having four diffraction gratings

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2001256670A (ja) * 2000-03-10 2001-09-21 Sony Corp 光学ピックアップ装置及び光ディスク装置
KR100341335B1 (ko) * 2000-05-18 2002-06-22 윤종용 광디스크 플레이어 및 그 기록 또는 재생방법
JP2002063732A (ja) * 2000-08-22 2002-02-28 Pioneer Electronic Corp 光ピックアップ装置
EP1226580B1 (fr) * 2000-09-25 2005-02-16 Koninklijke Philips Electronics N.V. Dispositif de lecture optique
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
JP2003006891A (ja) * 2001-06-21 2003-01-10 Sankyo Seiki Mfg Co Ltd 光ピックアップ装置
US6822771B2 (en) * 2001-09-28 2004-11-23 Ricoh Company, Ltd. Optical pickup unit and optical disk drive for accurate and stable information recording and reproduction
JP2003162831A (ja) * 2001-11-27 2003-06-06 Sharp Corp 光ピックアップ装置
JP2003196860A (ja) * 2001-12-27 2003-07-11 Ricoh Co Ltd 光ピックアップ装置及び光ディスク装置
KR100472443B1 (ko) * 2002-03-19 2005-02-21 삼성전자주식회사 광픽업 장치

Also Published As

Publication number Publication date
WO2004032126A1 (fr) 2004-04-15
AU2003263538A1 (en) 2004-04-23

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