ES2034001T3 - Aparato para la reproduccion de datos. - Google Patents

Aparato para la reproduccion de datos.

Info

Publication number
ES2034001T3
ES2034001T3 ES198888106869T ES88106869T ES2034001T3 ES 2034001 T3 ES2034001 T3 ES 2034001T3 ES 198888106869 T ES198888106869 T ES 198888106869T ES 88106869 T ES88106869 T ES 88106869T ES 2034001 T3 ES2034001 T3 ES 2034001T3
Authority
ES
Spain
Prior art keywords
focus
data
offset voltage
circuit
regulator
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.)
Expired - Lifetime
Application number
ES198888106869T
Other languages
English (en)
Inventor
Gunter Gleim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6327164&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2034001(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Application granted granted Critical
Publication of ES2034001T3 publication Critical patent/ES2034001T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G11B7/09—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
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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
    • G11B7/0909—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 astigmatic methods

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

1.- APARATO PARA LA REPRODUCCION DE DATOS, QUE SON REGISTABLES MEDIANTE UN DISPOSITIVO DE EXPLORACION OPTICO SEMITANGENCIAL CON UN SOPORTE INDICADOR. 2.1.- TAL APARATOS ESTAN FORMADOS CON CIRCUITOS REGULADORES DE FOCO PARA ENFOCAR LOS RAYOS DE LUZ, QUE EXPLOTAN A LOS DATOS SOBRE UN SOPORTE INDICADOR Y CON UN CIRCUITO REGULADOR DE VIA, PARA PODER DIRIGIR EL RAYO DE LUZ SOBRE LA VIA DE DATOS. EL AMPLIFICADOR REGULADOR (FR) DEL CIRCUITO DEL FOCO ESTA ADOBECIDO, SIN EMBARGO, CON UNA TENSION OFFSET, QUE SE CAMBIA CON LA TEMPERATURA Y LA MADURACION DEL AMPLIFICADOR REGULADOR. 2.2.- PARA COMPENSAR LA TENSION OFFSET DEL AMPLIFICADOR REGULADOR (FR), SE INSTALA UNA TENSION OFFSET DE LA COMPENSACION SOBRE SUS ENTRADAS Y SE CAMBIAN HASTA LA FASE LAS SEÑALES DE DATOS (HF) CON UNA SEÑAL ERRONEA DEL FOCO (FE), QUE SE DEDUCE DE LA SEÑAL DE DATOS (HF), HASTA QUE ESTA SEA IDENTICA QUE EL VALOR REAL DEL CIRCUITO REGULADOR DEL FOCO. 2.3. COMPACT - DISC, TOCADISCOS VIDEO, TOCADISCOS - DRAW, APARATOS MAGNETO -OPTICOS.
ES198888106869T 1987-05-09 1988-04-29 Aparato para la reproduccion de datos. Expired - Lifetime ES2034001T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873715491 DE3715491A1 (de) 1987-05-09 1987-05-09 Geraet zur wiedergabe von daten

Publications (1)

Publication Number Publication Date
ES2034001T3 true ES2034001T3 (es) 1993-04-01

Family

ID=6327164

Family Applications (1)

Application Number Title Priority Date Filing Date
ES198888106869T Expired - Lifetime ES2034001T3 (es) 1987-05-09 1988-04-29 Aparato para la reproduccion de datos.

Country Status (8)

Country Link
US (1) US4888754A (es)
EP (1) EP0290882B1 (es)
JP (1) JP2667439B2 (es)
KR (1) KR960013487B1 (es)
AT (1) ATE79974T1 (es)
DE (2) DE3715491A1 (es)
ES (1) ES2034001T3 (es)
HK (1) HK42796A (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3824039A1 (de) * 1988-07-15 1990-01-18 Thomson Brandt Gmbh Verfahren und schaltungsanordnung zur kompensation von offset-spannungen in einem fokus- und/oder spurregelkreis
JPH0785310B2 (ja) * 1989-04-07 1995-09-13 シャープ株式会社 信号処理回路内蔵型受光素子
DE4102857A1 (de) * 1991-01-31 1992-08-06 Thomson Brandt Gmbh Verfahren zum fokussieren eines lichtstrahls
KR100223182B1 (ko) * 1996-12-18 1999-10-15 윤종용 광디스크시스템의 피트깊이 보정방법
US20050128902A1 (en) * 2003-12-10 2005-06-16 Ming-Hsien Tsai Optical disc system and associated tilt angle calibration method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60195745A (ja) * 1984-03-16 1985-10-04 Pioneer Electronic Corp トラツキングサ−ボ信号生成方式
JP2625671B2 (ja) * 1984-11-06 1997-07-02 松下電器産業株式会社 焦点位置制御装置
JPS61177646A (ja) * 1985-02-04 1986-08-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 光学デイスク装置
JPS61188745A (ja) * 1985-02-15 1986-08-22 Olympus Optical Co Ltd フオ−カスサ−ボ制御方式
NL194811C (nl) * 1986-01-16 2003-03-04 Mitsubishi Electric Corp Servoschakeling.

Also Published As

Publication number Publication date
US4888754A (en) 1989-12-19
KR880014527A (ko) 1988-12-24
HK42796A (en) 1996-03-22
KR960013487B1 (ko) 1996-10-05
DE3715491A1 (de) 1988-11-17
ATE79974T1 (de) 1992-09-15
JPS6448231A (en) 1989-02-22
JP2667439B2 (ja) 1997-10-27
EP0290882B1 (de) 1992-08-26
DE3873973D1 (de) 1992-10-01
EP0290882A1 (de) 1988-11-17

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