KR20070104208A - 광픽업 - Google Patents

광픽업 Download PDF

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Publication number
KR20070104208A
KR20070104208A KR1020067026738A KR20067026738A KR20070104208A KR 20070104208 A KR20070104208 A KR 20070104208A KR 1020067026738 A KR1020067026738 A KR 1020067026738A KR 20067026738 A KR20067026738 A KR 20067026738A KR 20070104208 A KR20070104208 A KR 20070104208A
Authority
KR
South Korea
Prior art keywords
sub
beams
optical element
diffractive optical
divided
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.)
Withdrawn
Application number
KR1020067026738A
Other languages
English (en)
Korean (ko)
Inventor
마사유키 오노
마사히코 니시모토
타쯔야 나카모리
나오키 나카니시
Original Assignee
마츠시타 덴끼 산교 가부시키가이샤
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 마츠시타 덴끼 산교 가부시키가이샤 filed Critical 마츠시타 덴끼 산교 가부시키가이샤
Publication of KR20070104208A publication Critical patent/KR20070104208A/ko
Withdrawn legal-status Critical Current

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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)
KR1020067026738A 2005-02-15 2005-09-21 광픽업 Withdrawn KR20070104208A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005037010A JP2006228260A (ja) 2005-02-15 2005-02-15 光ピックアップ
JPJP-P-2005-00037010 2005-02-15

Publications (1)

Publication Number Publication Date
KR20070104208A true KR20070104208A (ko) 2007-10-25

Family

ID=36916257

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020067026738A Withdrawn KR20070104208A (ko) 2005-02-15 2005-09-21 광픽업

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
JP2006228260A (ja) 2006-08-31
TW200629259A (en) 2006-08-16

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Legal Events

Date Code Title Description
PA0105 International application

Patent event date: 20061219

Patent event code: PA01051R01D

Comment text: International Patent Application

PG1501 Laying open of application
PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid