ES2044554T3 - Dispositivo de exploracion optica. - Google Patents

Dispositivo de exploracion optica.

Info

Publication number
ES2044554T3
ES2044554T3 ES90902187T ES90902187T ES2044554T3 ES 2044554 T3 ES2044554 T3 ES 2044554T3 ES 90902187 T ES90902187 T ES 90902187T ES 90902187 T ES90902187 T ES 90902187T ES 2044554 T3 ES2044554 T3 ES 2044554T3
Authority
ES
Spain
Prior art keywords
disk
data
objective lens
light beam
players
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
ES90902187T
Other languages
English (en)
Inventor
Yasuaki Morimoto
Friedhelm Zucker
Heinz-Jorg Schroder
Christian Buchler
Gerhard Weissmann
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
Priority claimed from DE19893901574 external-priority patent/DE3901574A1/de
Priority claimed from DE3942943A external-priority patent/DE3942943A1/de
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Application granted granted Critical
Publication of ES2044554T3 publication Critical patent/ES2044554T3/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
    • G11B7/0908—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
    • 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
    • G11B7/0901—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
    • 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
    • G11B7/12—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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Vehicle Body Suspensions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Microscoopes, Condenser (AREA)
  • Holo Graphy (AREA)
  • Optical Communication System (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

DISPOSITIVO DE EXPLORACION OPTICA CON UN LENTE DE OBJETIVO. EN UN APARATO DE GRABACION Y/O DE REPRODUCCION QUE LEE DATOS DESDE UN SOPORTE GRABADOR OPTICO, POR EJEMPLO UN DISCO, MEDIANTE EL PROCESO DE RAYOS UNICO, SE MUEVE TODO EL DISPOSITIVO DE EXPLORACION OPTICA PARA DIRIGIR EL RAYO DE LUZ SOBRE LAS PISTAS DE DATOS EN EL DISCO. NO ES POSIBLE CONSEGUIR UN BUEN AJUSTE MOVIENDO UNICAMENTE LA LENTE DE OBJETIVO EN UNA DIRECCION RADIAL, COMO EN EL PROCESO DE RAYO UNICO, PORQUE EL PUNTO DE LUZ SIGUE EL MOVIMIENTO FOTODETECTOR DE DOS PARTES, PROVOCANDO UNA COMPENSACION EN LA SEÑAL DE ERROR DE PISTA TE. PARA PERMITIR UN BUEN AJUSTE MEDIANTE LA LENTE DE OBJETIVO, EL RAYO DE LUZ (L) QUE EXPLORA LOS DATOS SE MUEVE UN BUEN ACCIONAMIENTO EN UNA DIRECCION (W) QUE FORMA UN ANGULO ALFA CON LA NORMAL (R) Y LA PISTA DE DATOS. EL RAYO DE LUZ (L) SE REFLEJA DESDE EL DISCO SOBRE UN FOTODETECTOR QUE CONSTA DE VARIOS FOTODIODOS (A, B, C, D), Y LA SEÑAL DE ERROR DE PISTA (TE) SE DESVIA DESDE LAS SEÑALES (AS, BS, CS, DS) DE DICHOS FOTODIODOS POR SUMA PONDERADA Y FORMACION DE DIFERENCIA. APLICACION: REPRODUCTORES DE CD, APARATOS DE REPRODUCCION Y GRABACION MAGNETO-OPTICA , REPRODUCTORES DE VIDEO CON DISCO, REPRODUCTORES DE DISCO DRAW.
ES90902187T 1989-01-20 1990-01-09 Dispositivo de exploracion optica. Expired - Lifetime ES2044554T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893901574 DE3901574A1 (de) 1989-01-20 1989-01-20 Optische abtastvorrichtung
DE3942943A DE3942943A1 (de) 1989-12-23 1989-12-23 Optische abtastvorrichtung

Publications (1)

Publication Number Publication Date
ES2044554T3 true ES2044554T3 (es) 1994-01-01

Family

ID=25876949

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90902187T Expired - Lifetime ES2044554T3 (es) 1989-01-20 1990-01-09 Dispositivo de exploracion optica.

Country Status (13)

Country Link
EP (1) EP0454740B1 (es)
JP (1) JP2807080B2 (es)
KR (1) KR0166358B1 (es)
CN (1) CN1053056C (es)
AT (1) ATE92664T1 (es)
DE (1) DE59002209D1 (es)
DK (1) DK0454740T3 (es)
ES (1) ES2044554T3 (es)
HK (1) HK8296A (es)
HU (1) HU208587B (es)
MY (1) MY105765A (es)
NO (1) NO912838D0 (es)
WO (1) WO1990008381A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3258363B2 (ja) * 1992-03-26 2002-02-18 パイオニア株式会社 トラッキングエラー検出装置
DE4323067A1 (de) * 1993-07-10 1995-01-12 Thomson Brandt Gmbh G-Faktor-Abgleich
JP3549301B2 (ja) * 1995-09-08 2004-08-04 三菱電機株式会社 光ヘッドのトラッキング誤差検出装置
DE10026830A1 (de) * 2000-05-30 2001-12-06 Zeiss Carl Jena Gmbh Optischer Sensor zur Messung des Abstands und/oder der Neigung einer Fläche

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100244A (ja) * 1981-12-10 1983-06-14 Foster Denki Kk 光学式情報再生装置
JPS58146034A (ja) * 1982-02-24 1983-08-31 Nec Corp 光学式情報記録読み取り装置
JPS62205533A (ja) * 1986-03-06 1987-09-10 Seiko Instr & Electronics Ltd 光情報検出装置

Also Published As

Publication number Publication date
DE59002209D1 (de) 1993-09-09
WO1990008381A1 (de) 1990-07-26
KR0166358B1 (ko) 1999-03-20
JP2807080B2 (ja) 1998-09-30
NO912838L (no) 1991-07-19
HU208587B (en) 1993-11-29
KR910700520A (ko) 1991-03-15
MY105765A (en) 1995-01-30
EP0454740A1 (de) 1991-11-06
CN1044358A (zh) 1990-08-01
HUT58943A (en) 1992-03-30
HK8296A (en) 1996-01-26
JPH04502978A (ja) 1992-05-28
CN1053056C (zh) 2000-05-31
HU901683D0 (en) 1991-11-28
NO912838D0 (no) 1991-07-19
DK0454740T3 (da) 1993-11-22
ATE92664T1 (de) 1993-08-15
EP0454740B1 (de) 1993-08-04

Similar Documents

Publication Publication Date Title
ATE86777T1 (de) Optische abtastvorrichtung und verfahren fuer eine optische abtastvorrichtung.
EP0191467B1 (en) Optical disc apparatus
DE3784326D1 (de) Spurfolgesysteme fuer optische plattenspieler.
KR900008378B1 (ko) 광학식 기록장치
CA2002381A1 (en) Optical pickup device
ES2044554T3 (es) Dispositivo de exploracion optica.
KR100213270B1 (ko) 양면 디스크용 광 픽업
ATE71467T1 (de) Geraet zur wiedergabe von daten.
ATE83330T1 (de) Geraet zur wiedergabe von daten.
US5121372A (en) Optical information processing apparatus for performing track jump while avoiding preformat signal
CN1019428B (zh) 按照三束处理对信息介质扫描的光扫描方法
KR0168456B1 (ko) 자기광학장치
ATE70653T1 (de) Spurregelkreis zum fuehren eines lichtstrahls.
SU1727167A1 (ru) Устройство дл оптической записи - воспроизведени информации
KR880003295A (ko) 광학식 디스크재생장치의 촛점 서어보이득 조정회로
JP2741961B2 (ja) 光学的情報記録再生装置
MY104456A (en) Optical pickup device.
JPS6427058A (en) Magneto-optical recording and reproducing device
KR970007883A (ko) 데이타 기록 및 재생용 광학 디스크 장치
JPH05502538A (ja) 光学走査装置
JPH0518183B2 (es)
KR880004445A (ko) 안내홈이 없는 광학 디스크의 정보신호 기록재생용 광학 헤드장치
JPS6218974B2 (es)
KR980004514A (ko) 광디스크재생장치
KR940016051A (ko) 광픽업의 트랙횡단신호 검출방법

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 454740

Country of ref document: ES