BR0312051A - Servomecanismo de foco - Google Patents

Servomecanismo de foco

Info

Publication number
BR0312051A
BR0312051A BR0312051-1A BR0312051A BR0312051A BR 0312051 A BR0312051 A BR 0312051A BR 0312051 A BR0312051 A BR 0312051A BR 0312051 A BR0312051 A BR 0312051A
Authority
BR
Brazil
Prior art keywords
focus
sym
objective lens
light
standardized
Prior art date
Application number
BR0312051-1A
Other languages
English (en)
Inventor
Akinori Ohkubo
Takuma Yanagisawa
Original Assignee
Pioneer Corp
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 Pioneer Corp filed Critical Pioneer Corp
Publication of BR0312051A publication Critical patent/BR0312051A/pt

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
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Head (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

"SERVOMECANISMO DE FOCO". A presente invenção refere-se a um servomecanismo de foco que é utilizado para focalizar uma luz irradiada de uma fonte luminosa sobre a superfície de um suporte de gravação por meio de uma lente objetiva. Supondo que o comprimento de onda da luz é <sym>, a abertura numérica da lente objetiva é NA, o período médio de comprimento de processamento padronizado com <sym> / NA é RL, o passo entre trilhas padronizado com <sym> / NA é TP, e a faixa de captura do referido servomecanismo de foco é CR [<109>m], chega-se à seguinte equação: 0,1 141 (RL - 0,72) + 0,84 <243> CR <243> 18.000 (TP - 0,69)^ 5^ + 3,13.
BR0312051-1A 2002-06-25 2003-06-23 Servomecanismo de foco BR0312051A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002185251A JP2004030776A (ja) 2002-06-25 2002-06-25 フォーカスサーボ装置
PCT/JP2003/007937 WO2004001729A1 (ja) 2002-06-25 2003-06-23 フォーカスサーボ装置

Publications (1)

Publication Number Publication Date
BR0312051A true BR0312051A (pt) 2005-03-29

Family

ID=29996729

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0312051-1A BR0312051A (pt) 2002-06-25 2003-06-23 Servomecanismo de foco

Country Status (11)

Country Link
US (1) US7190642B2 (pt)
EP (1) EP1533798A4 (pt)
JP (1) JP2004030776A (pt)
KR (1) KR100953406B1 (pt)
CN (1) CN1282952C (pt)
AU (1) AU2003243952A1 (pt)
BR (1) BR0312051A (pt)
MX (1) MXPA05000025A (pt)
RU (1) RU2321081C2 (pt)
TW (1) TWI245567B (pt)
WO (1) WO2004001729A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101354893B (zh) * 2007-07-24 2010-07-07 建兴电子科技股份有限公司 光驱的最佳球面像差补偿位准的校准方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2552660B2 (ja) * 1986-11-21 1996-11-13 三菱電機株式会社 フオ−カス誤差検出装置
JPH05120698A (ja) 1991-10-25 1993-05-18 Matsushita Electric Ind Co Ltd フオーカスサーボ引き込み装置
JP3558306B2 (ja) * 1994-07-26 2004-08-25 パイオニア株式会社 多層記録ディスク及びこれを用いた記録／再生システム
JPH08147715A (ja) * 1994-11-22 1996-06-07 Sony Corp ディスク記録又は再生装置及びフォーカスサーボ回路
JPH08315370A (ja) 1995-05-16 1996-11-29 Ricoh Co Ltd 情報記録再生装置及び記録媒体
JP3476112B2 (ja) * 1995-10-18 2003-12-10 ソニー株式会社 フォーカスサーボ装置
US6567353B1 (en) * 1999-01-21 2003-05-20 Pentax Corporation Optical head with light receiving element surfaces divided into at least three light receiving areas
JP3635524B2 (ja) * 1999-02-12 2005-04-06 パイオニア株式会社 光導波路素子及び光ピックアップ
JP2002230801A (ja) * 2001-02-02 2002-08-16 Pioneer Electronic Corp 光ピックアップ装置
US7016269B2 (en) * 2000-12-21 2006-03-21 Pioneer Corporation Optical pickup apparatus and focusing control method

Also Published As

Publication number Publication date
RU2005101636A (ru) 2005-06-10
KR100953406B1 (ko) 2010-04-19
EP1533798A4 (en) 2008-05-21
RU2321081C2 (ru) 2008-03-27
CN1662970A (zh) 2005-08-31
US7190642B2 (en) 2007-03-13
AU2003243952A1 (en) 2004-01-06
CN1282952C (zh) 2006-11-01
TWI245567B (en) 2005-12-11
EP1533798A1 (en) 2005-05-25
MXPA05000025A (es) 2005-08-26
TW200406121A (en) 2004-04-16
WO2004001729A1 (ja) 2003-12-31
JP2004030776A (ja) 2004-01-29
US20050276175A1 (en) 2005-12-15
KR20050022020A (ko) 2005-03-07

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A ANUIDADE(S).

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2143 DE 31/01/2012.