TW336311B - Method and device for focusing and tracking of an optical head - Google Patents

Method and device for focusing and tracking of an optical head

Info

Publication number
TW336311B
TW336311B TW086115108A TW86115108A TW336311B TW 336311 B TW336311 B TW 336311B TW 086115108 A TW086115108 A TW 086115108A TW 86115108 A TW86115108 A TW 86115108A TW 336311 B TW336311 B TW 336311B
Authority
TW
Taiwan
Prior art keywords
focusing
tracking
light
laser
optical head
Prior art date
Application number
TW086115108A
Other languages
English (en)
Inventor
Jinn-Kang Wang
Shyi-Fuh Shy
Original Assignee
Ind Tech Res Inst
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 Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW086115108A priority Critical patent/TW336311B/zh
Priority to US09/063,946 priority patent/US6377520B2/en
Application granted granted Critical
Publication of TW336311B publication Critical patent/TW336311B/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
    • G11B7/13—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
    • G11B7/08—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
    • 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
    • G11B7/0908—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 focusing only
    • G11B7/0912—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 focusing only by push-pull method
    • 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
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
    • 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
    • G11B7/12—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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • G11B7/1384—Fibre optics
    • 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)
  • Mathematical Physics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
TW086115108A 1997-10-15 1997-10-15 Method and device for focusing and tracking of an optical head TW336311B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW086115108A TW336311B (en) 1997-10-15 1997-10-15 Method and device for focusing and tracking of an optical head
US09/063,946 US6377520B2 (en) 1997-10-15 1998-04-21 Robust and versatile focus/tracking method and system for optical pickup heads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW086115108A TW336311B (en) 1997-10-15 1997-10-15 Method and device for focusing and tracking of an optical head

Publications (1)

Publication Number Publication Date
TW336311B true TW336311B (en) 1998-07-11

Family

ID=21627097

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086115108A TW336311B (en) 1997-10-15 1997-10-15 Method and device for focusing and tracking of an optical head

Country Status (2)

Country Link
US (1) US6377520B2 (zh)
TW (1) TW336311B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862257B2 (en) 2002-03-12 2005-03-01 Benq Corporation Method for adjusting a tilt angle for an optical disc player
TWI404060B (zh) * 2004-12-01 2013-08-01 Ｈｏｙａ股份有限公司 光學元件之設計方法、光學系統、光碟機之光學裝置、物鏡及光碟機

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3659089B2 (ja) 1999-10-25 2005-06-15 株式会社日立製作所 光ヘッド及びそれを用いた光学的情報媒体記録再生装置
JP2002163837A (ja) * 2000-11-27 2002-06-07 Pioneer Electronic Corp 光ピックアップ装置及びレーザダイオードチップ
JP4557281B2 (ja) * 2004-02-16 2010-10-06 株式会社リコー 光ピックアップ装置及び光ディスク装置
US7477274B2 (en) * 2004-12-22 2009-01-13 Hewlett-Packard Development Company, L.P. Thermally sensitive medium and methods and systems for forming an image on a thermally sensitive medium
US7692746B2 (en) * 2005-08-01 2010-04-06 Real D Digitally-switchable bandpass filter
JP5058080B2 (ja) * 2008-06-13 2012-10-24 株式会社ミツトヨ 光学式変位測定器
US9442095B2 (en) 2011-06-15 2016-09-13 Northwestern University Optical coherence photoacoustic microscopy
JP2019527576A (ja) 2016-07-15 2019-10-03 キヤノン ユーエスエイ, インコーポレイテッドCanon U.S.A., Inc スペクトル符号化プローブ

Family Cites Families (20)

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JPS59132433A (ja) * 1983-01-19 1984-07-30 Nippon Telegr & Teleph Corp <Ntt> 光ヘツド
JPS6194246A (ja) * 1984-10-15 1986-05-13 Sony Corp 光学式ヘッドのトラッキング誤差検出方法
US4771415A (en) * 1985-02-27 1988-09-13 Brother Kogyo Kabushiki Kaisha Optical data storage and readout apparatus and head, using optical fibers between stationary and movable units
EP0228620B1 (en) * 1985-12-10 1991-06-05 Nec Corporation Optical head comprising a diffraction grating for directing two or more diffracted beams to optical detectors
JPH0626972Y2 (ja) * 1986-10-03 1994-07-20 パイオニア株式会社 光学式ピツクアツプ装置
JPH06101138B2 (ja) * 1987-03-19 1994-12-12 松下電器産業株式会社 光ヘツド装置
JPH07101519B2 (ja) * 1987-10-05 1995-11-01 松下電器産業株式会社 光ヘッド装置
JPH01311428A (ja) * 1988-06-09 1989-12-15 Matsushita Electric Ind Co Ltd 光ヘッド装置及びこれを用いた光情報装置
JP2684763B2 (ja) * 1989-04-24 1997-12-03 ソニー株式会社 光学記録および／または再生装置
US5172369A (en) * 1990-03-02 1992-12-15 Pioneer Electronic Corporation Optical pickup, optical information recording carrier and recording and reproducing apparatus thereof
JPH0547016A (ja) * 1991-08-13 1993-02-26 Asahi Optical Co Ltd 光デイスク装置の信号検出系
JP3350072B2 (ja) * 1991-11-12 2002-11-25 パイオニア株式会社 ピックアップ装置
NL9300774A (nl) * 1992-05-13 1993-12-01 Gold Star Co Optische opneeminrichting.
US5465247A (en) * 1992-05-14 1995-11-07 Olympus Optical Co., Ltd. Optical head
US5283775A (en) * 1992-12-14 1994-02-01 International Business Machines, Inc. Split detector system for direct read-while-write operation on magneto-optic media
JPH06309692A (ja) * 1993-04-22 1994-11-04 Canon Inc 光学的情報記録再生装置
US5523993A (en) * 1995-05-17 1996-06-04 Opto-Electronics & Systems Laboratories Holographic optical element for optical disk pickup head
JP2748905B2 (ja) * 1995-09-29 1998-05-13 日本電気株式会社 光ヘッド装置
US5652744A (en) * 1996-02-08 1997-07-29 Industrial Technology Research Institute Single surface diffractive element for optical pickup heads
JP3524287B2 (ja) * 1996-09-13 2004-05-10 パイオニア株式会社 光学式ピックアップ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862257B2 (en) 2002-03-12 2005-03-01 Benq Corporation Method for adjusting a tilt angle for an optical disc player
TWI404060B (zh) * 2004-12-01 2013-08-01 Ｈｏｙａ股份有限公司 光學元件之設計方法、光學系統、光碟機之光學裝置、物鏡及光碟機
US8705331B2 (en) 2004-12-01 2014-04-22 Hoya Corporation Optical element and objective lens through which a plurality of light beams having different design wavelengths pass

Also Published As

Publication number Publication date
US6377520B2 (en) 2002-04-23
US20010014060A1 (en) 2001-08-16

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GD4A Issue of patent certificate for granted invention patent
MM4A Annulment or lapse of patent due to non-payment of fees