TW200629259A - Optical pickup - Google Patents

Optical pickup

Info

Publication number
TW200629259A
TW200629259A TW095104811A TW95104811A TW200629259A TW 200629259 A TW200629259 A TW 200629259A TW 095104811 A TW095104811 A TW 095104811A TW 95104811 A TW95104811 A TW 95104811A TW 200629259 A TW200629259 A TW 200629259A
Authority
TW
Taiwan
Prior art keywords
sub
push
optical pickup
pull signal
phase
Prior art date
Application number
TW095104811A
Other languages
English (en)
Chinese (zh)
Inventor
Masayuki Ono
Masahiko Nishimoto
Tatsuya Nakamori
Naoki Nakanishi
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of TW200629259A publication Critical patent/TW200629259A/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
    • G11B7/08—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
    • G11B7/08—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
    • G11B7/12—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
    • G11B7/08—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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
TW095104811A 2005-02-15 2006-02-14 Optical pickup TW200629259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005037010A JP2006228260A (ja) 2005-02-15 2005-02-15 光ピックアップ

Publications (1)

Publication Number Publication Date
TW200629259A true TW200629259A (en) 2006-08-16

Family

ID=36916257

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095104811A TW200629259A (en) 2005-02-15 2006-02-14 Optical pickup

Country Status (7)

Country Link
US (1) US20080074966A1 (enExample)
EP (1) EP1860653A1 (enExample)
JP (1) JP2006228260A (enExample)
KR (1) KR20070104208A (enExample)
CN (1) CN1981332A (enExample)
TW (1) TW200629259A (enExample)
WO (1) WO2006087843A1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4106072B1 (ja) * 2006-12-18 2008-06-25 松下電器産業株式会社 光ピックアップ装置
EP2141699A1 (en) * 2008-06-30 2010-01-06 Deutsche Thomson OHG Apparatus for reading from an optical recording medium
US8630154B2 (en) * 2010-05-11 2014-01-14 Thomson Licensing, LLC Apparatus comprising a pickup providing multiple beams
JP2012079374A (ja) * 2010-09-30 2012-04-19 Sanyo Electric Co Ltd 光ピックアップ装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138625U (enExample) * 1987-03-04 1988-09-13
JPH07320287A (ja) * 1994-05-24 1995-12-08 Olympus Optical Co Ltd 光ピックアップ装置
JPH11296879A (ja) * 1998-04-02 1999-10-29 Sony Corp 光ディスク装置とその制御方法
JP3527705B2 (ja) * 1999-12-28 2004-05-17 シャープ株式会社 光ピックアップ及びトラッキングサーボ方法
JP2003162831A (ja) * 2001-11-27 2003-06-06 Sharp Corp 光ピックアップ装置
JP3826082B2 (ja) * 2002-08-23 2006-09-27 シャープ株式会社 光ピックアップ装置
JP2004253111A (ja) * 2003-01-31 2004-09-09 Sharp Corp 光ピックアップ装置
JP2004355790A (ja) * 2003-05-08 2004-12-16 Sharp Corp ホログラム結合体およびその製造方法、ホログラムレーザユニットならびに光ピックアップ装置
JP3779705B2 (ja) * 2003-08-13 2006-05-31 Ｔｄｋ株式会社 光ヘッド、ｌｄモジュール、光記録再生装置及び光記録再生装置に用いる回折素子
JP2005182938A (ja) * 2003-12-22 2005-07-07 Matsushita Electric Ind Co Ltd 光ピックアップ装置

Also Published As

Publication number Publication date
US20080074966A1 (en) 2008-03-27
WO2006087843A1 (ja) 2006-08-24
CN1981332A (zh) 2007-06-13
EP1860653A1 (en) 2007-11-28
KR20070104208A (ko) 2007-10-25
JP2006228260A (ja) 2006-08-31

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