TWI376689B - Pickup for optical recording medium - Google Patents

Pickup for optical recording medium Download PDF

Info

Publication number
TWI376689B
TWI376689B TW095118690A TW95118690A TWI376689B TW I376689 B TWI376689 B TW I376689B TW 095118690 A TW095118690 A TW 095118690A TW 95118690 A TW95118690 A TW 95118690A TW I376689 B TWI376689 B TW I376689B
Authority
TW
Taiwan
Prior art keywords
optical recording
recording medium
state
diffraction grating
optical
Prior art date
Application number
TW095118690A
Other languages
English (en)
Chinese (zh)
Other versions
TW200701216A (en
Inventor
Joachim Knittel
Hartmut Richter
Gael Pilard
Original Assignee
Thomson Licensing
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 Thomson Licensing filed Critical Thomson Licensing
Publication of TW200701216A publication Critical patent/TW200701216A/zh
Application granted granted Critical
Publication of TWI376689B publication Critical patent/TWI376689B/zh

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1828—Diffraction gratings having means for producing variable diffraction
    • 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
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive 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
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
TW095118690A 2005-06-16 2006-05-26 Pickup for optical recording medium TWI376689B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05012989A EP1736975A1 (en) 2005-06-16 2005-06-16 Pickup for optical recording medium

Publications (2)

Publication Number Publication Date
TW200701216A TW200701216A (en) 2007-01-01
TWI376689B true TWI376689B (en) 2012-11-11

Family

ID=35276135

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095118690A TWI376689B (en) 2005-06-16 2006-05-26 Pickup for optical recording medium

Country Status (8)

Country Link
US (1) US7541564B2 (enExample)
EP (2) EP1736975A1 (enExample)
JP (1) JP4996139B2 (enExample)
KR (1) KR101296761B1 (enExample)
CN (1) CN1881432B (enExample)
DE (1) DE602006008387D1 (enExample)
MY (1) MY143008A (enExample)
TW (1) TWI376689B (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4433315B2 (ja) * 2006-01-12 2010-03-17 ソニー株式会社 光ピックアップ及び光情報装置
EP2009626A1 (en) * 2007-06-29 2008-12-31 Deutsche Thomson OHG Apparatus comprising a pickup unit providing three beams for reading data from or writing data to an optical storage medium, and respective optical storage medium

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113937A (ja) * 1986-10-31 1988-05-18 Kyocera Corp 光学的読み取り方法
JPH0793757A (ja) * 1993-09-22 1995-04-07 Sanyo Electric Co Ltd 光記録媒体及びその記録再生方法
US5717674A (en) * 1995-06-30 1998-02-10 Sanyo Electrics Co., Ltd. Three-beam generating diffraction grating, transmission type holographic optical element and optical pickup apparatus using the same
US20020075783A1 (en) * 1998-02-20 2002-06-20 Amir Alon Switchable liquid crystal diffractive element
JP3560805B2 (ja) * 1998-03-20 2004-09-02 パイオニア株式会社 光ピックアップ
US6687196B1 (en) * 1998-05-08 2004-02-03 Fuji Xerox Co., Lt.D. Method and apparatus for implementing high density recording on a recording medium and a method of manufacturing same
JP2002074727A (ja) * 2000-09-01 2002-03-15 Samsung Electro Mech Co Ltd ダイナミック制御回折格子並びに情報記録再生装置と情報再生装置
JP4822037B2 (ja) * 2001-08-24 2011-11-24 コニカミノルタホールディングス株式会社 光ピックアップ装置の対物レンズ及び光ピックアップ装置
JP2003099984A (ja) * 2001-09-26 2003-04-04 Toshiba Corp 光学的情報記録または再生装置および光学的情報記録媒体
KR20050054990A (ko) * 2002-10-04 2005-06-10 코닌클리케 필립스 일렉트로닉스 엔.브이. 고 트랙밀도 초 분해능 광자기 롬 매체
JP3772851B2 (ja) * 2003-03-28 2006-05-10 ソニー株式会社 光ピックアップ装置及び光ディスク装置
JP2005339646A (ja) * 2004-05-26 2005-12-08 Mitsumi Electric Co Ltd 光ピックアップおよびそれに使用される回折格子

Also Published As

Publication number Publication date
KR101296761B1 (ko) 2013-08-14
EP1736977B1 (en) 2009-08-12
MY143008A (en) 2011-02-14
EP1736975A1 (en) 2006-12-27
JP4996139B2 (ja) 2012-08-08
EP1736977A1 (en) 2006-12-27
US7541564B2 (en) 2009-06-02
JP2006351169A (ja) 2006-12-28
CN1881432B (zh) 2012-09-05
DE602006008387D1 (de) 2009-09-24
US20060285471A1 (en) 2006-12-21
TW200701216A (en) 2007-01-01
CN1881432A (zh) 2006-12-20
KR20060131622A (ko) 2006-12-20

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Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees