ES2076751T3 - Aparato optico de registro y/o reproduccion. - Google Patents

Aparato optico de registro y/o reproduccion.

Info

Publication number
ES2076751T3
ES2076751T3 ES92903612T ES92903612T ES2076751T3 ES 2076751 T3 ES2076751 T3 ES 2076751T3 ES 92903612 T ES92903612 T ES 92903612T ES 92903612 T ES92903612 T ES 92903612T ES 2076751 T3 ES2076751 T3 ES 2076751T3
Authority
ES
Spain
Prior art keywords
disc
circuit
servo
player
light beam
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
ES92903612T
Other languages
English (en)
Inventor
Dieter Baas
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
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Application granted granted Critical
Publication of ES2076751T3 publication Critical patent/ES2076751T3/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
    • G11B7/0948—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 specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

EN UN REPRODUCTOR CD, DE UN APARATO REPRODUCTOR OPTICO CONOCIDO, SE ENFOCA UN RAYO DE LUZ POR MEDIO DE UN CIRCUITO DE REGULACION DEL FOCO SOBRE EL DISCO COMPACTO Y SE CONDUCE POR MEDIO DE UN CIRCUITO DE CONTROL DE LA PISTA A LO LARGO DE LAS PISTAS DE DATOS DEL DISCO. CUANDO EL RAYO DE LUZ EXPLORA ZONAS DAÑADAS DEL DISCO, POR EJEMPLO, DEBIDO A ARAÑAZOS O AGUJEROS, PUEDEN FALLAR TANTO EL FOCO COMO TAMBIEN EL CIRCUITO DE CONTROL DE LA PISTA, LOS CUALES TAMBIEN SE DESIGNAN COMO CIRCUITOS SERVO. CON EL FIN DE IMPEDIR AMPLIAMENTE EL FALLO DE LOS CIRCUITOS SERVO EN DISCOS DAÑADOS, SE ALMACENA LA SEÑAL DE CONTROL PROCEDENTE DE CADA CIRCUITO SERVO, POR LO MENOS PARA LA ULTIMA REVOLUCION DEL DISCO. DURANTE UN PERIODO EN EL QUE SE PRESENTAN INTERFERENCIAS DE LA SEÑAL, EL ELEMENTO DE CONTROL FINAL (SG) DEL CIRCUITO SERVO YA NO ES ALIMENTADO CON LA SEÑAL DE CONTROL PRODUCIDA POR LA UNIDAD DE CONTROL, SINO CON LA SEÑAL ALMACENADA. LA INVENCION PUEDE SER USADA EN APARATOS REPRODUCTORES DE CD, REPRODUCTORES DE DISCOS DE VIDEO, REPRODUCTORES DE DISCOS DRAW Y APARATOS OPTICO-MAGNETICOS.
ES92903612T 1991-02-09 1992-02-04 Aparato optico de registro y/o reproduccion. Expired - Lifetime ES2076751T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4103974A DE4103974A1 (de) 1991-02-09 1991-02-09 Optisches aufzeichnungs- und/oder wiedergabegeraet

Publications (1)

Publication Number Publication Date
ES2076751T3 true ES2076751T3 (es) 1995-11-01

Family

ID=6424730

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92903612T Expired - Lifetime ES2076751T3 (es) 1991-02-09 1992-02-04 Aparato optico de registro y/o reproduccion.

Country Status (8)

Country Link
US (1) US5867461A (es)
EP (1) EP0570408B1 (es)
JP (1) JPH06505109A (es)
KR (1) KR100268310B1 (es)
DE (2) DE4103974A1 (es)
ES (1) ES2076751T3 (es)
HK (1) HK15096A (es)
WO (1) WO1992014242A1 (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3243883B2 (ja) * 1993-04-12 2002-01-07 ソニー株式会社 記録又は再生装置
JP3489476B2 (ja) * 1999-03-18 2004-01-19 株式会社日立製作所 情報記録再生装置
DE10048920A1 (de) * 2000-10-04 2002-04-11 Bosch Gmbh Robert Verfahren zur Regelung der Nachführung einer Abtastvorrichtung und Laufwerk dafür
KR100408396B1 (ko) * 2001-02-05 2003-12-06 삼성전자주식회사 디스크 크랙 검출 방법 및 이를 이용한 디스크 드라이브의배속 제어 방법
US7088657B1 (en) * 2001-09-27 2006-08-08 Gateway, Inc. Optical media integrity detection
TWI257084B (en) * 2002-10-09 2006-06-21 Media Tek Inc Shock detector for optical disc recorders and shock-proof recording method using the same
KR100498450B1 (ko) * 2002-10-14 2005-07-01 삼성전자주식회사 기록/재생 중의 충격에 대응하는 광 디스크 시스템 및이에 대한 충격 대응 방법
WO2005057563A1 (en) * 2003-12-08 2005-06-23 Koninklijke Philips Electronics N.V. Optical disc servo that is robust for defects
JP2008516361A (ja) * 2004-10-05 2008-05-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 光ディスク上における脱焦点となったトラックフォーカシングの回復
TWI361431B (en) * 2007-11-09 2012-04-01 Sunplus Technology Co Ltd Apparatus and method for generating track-crossing signal of optical disk device
US9472224B2 (en) 2013-12-05 2016-10-18 Seagate Technology Llc Electrically removable heater for a thermally actuatable thermal asperity sensor
US9558774B1 (en) * 2015-09-25 2017-01-31 Seagate Technology Llc Recording head with electrically removable component

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940326A (ja) * 1982-08-30 1984-03-06 Hitachi Ltd デイスク再生装置
JPS6074129A (ja) * 1983-09-30 1985-04-26 Sony Corp 光学式デイスクのトラツキングサ−ボ回路
JPS60123766U (ja) * 1984-01-31 1985-08-21 パイオニア株式会社 記録情報再生装置におけるドロツプアウト検出回路
GB2158611A (en) * 1984-05-07 1985-11-13 Rca Corp Servo error reduction apparatus for disc record playback system
JPS62180568A (ja) * 1986-02-04 1987-08-07 Sony Corp デイスク状記録媒体の欠陥検出装置
JP2796285B2 (ja) * 1986-07-11 1998-09-10 株式会社日立製作所 トラッキング方法及びそれを用いた光ディスク装置
DE3630179A1 (de) * 1986-09-04 1988-03-10 Grundig Emv Verfahren und einrichtung zur dropoutkompensation bei der wiedergabe magnetisch aufgezeichneter signale
JP2683104B2 (ja) * 1989-06-12 1997-11-26 キヤノン株式会社 情報記録再生装置
US5241433A (en) * 1990-04-17 1993-08-31 International Business Machines Corporation Disk drive servo control

Also Published As

Publication number Publication date
EP0570408B1 (de) 1995-06-28
US5867461A (en) 1999-02-02
EP0570408A1 (de) 1993-11-24
DE4103974A1 (de) 1992-08-13
KR100268310B1 (ko) 2000-10-16
JPH06505109A (ja) 1994-06-09
DE59202739D1 (de) 1995-08-03
HK15096A (en) 1996-02-02
WO1992014242A1 (de) 1992-08-20

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