FR2609348B1 - Appareil de detection d'erreur de mise au point - Google Patents

Appareil de detection d'erreur de mise au point

Info

Publication number
FR2609348B1
FR2609348B1 FR8800113A FR8800113A FR2609348B1 FR 2609348 B1 FR2609348 B1 FR 2609348B1 FR 8800113 A FR8800113 A FR 8800113A FR 8800113 A FR8800113 A FR 8800113A FR 2609348 B1 FR2609348 B1 FR 2609348B1
Authority
FR
France
Prior art keywords
error detection
detection apparatus
focusing error
focusing
error
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 - Fee Related
Application number
FR8800113A
Other languages
English (en)
Other versions
FR2609348A1 (fr
Inventor
Maeda Takanori
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Electronic Corp filed Critical Pioneer Electronic Corp
Publication of FR2609348A1 publication Critical patent/FR2609348A1/fr
Application granted granted Critical
Publication of FR2609348B1 publication Critical patent/FR2609348B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/133—Shape of individual detector elements
    • 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
    • G11B7/0912—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 push-pull method
    • 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
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Head (AREA)
FR8800113A 1987-01-07 1988-01-07 Appareil de detection d'erreur de mise au point Expired - Fee Related FR2609348B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62002160A JP2596545B2 (ja) 1987-01-07 1987-01-07 焦点誤差検出装置及びこれに用いられる光検出器の受光領域幅の選定方法

Publications (2)

Publication Number Publication Date
FR2609348A1 FR2609348A1 (fr) 1988-07-08
FR2609348B1 true FR2609348B1 (fr) 1994-02-11

Family

ID=11521603

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8800113A Expired - Fee Related FR2609348B1 (fr) 1987-01-07 1988-01-07 Appareil de detection d'erreur de mise au point

Country Status (4)

Country Link
US (1) US4920527A (fr)
JP (1) JP2596545B2 (fr)
DE (1) DE3800255A1 (fr)
FR (1) FR2609348B1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5126988A (en) * 1989-05-22 1992-06-30 Nhk Spring Co., Ltd. Optical head structure
CA2012401C (fr) * 1989-05-26 1994-05-10 Anthony G. Dewey Detection des erreurs de focalisation par surveillance de l'agrandissement du spot par un prisme
JP2795528B2 (ja) * 1990-07-25 1998-09-10 パイオニア株式会社 信号検出装置
US20050068864A1 (en) * 1999-07-08 2005-03-31 Samsung Electronics Co., Ltd. Method and apparatus for tracking error detection in optical disk driver
KR100750093B1 (ko) * 2000-10-12 2007-08-21 삼성전자주식회사 광픽업용 디포커스 에러신호 검출장치 및 방법 및 이를채용한 시크 방향 검출장치 및 방법
KR100354771B1 (ko) * 2000-12-28 2002-10-05 삼성전자 주식회사 기록매체 두께 변화 검출 및/또는 그 두께 변화에 의해발생된 구면수차 보정 가능한 광픽업장치
KR100408284B1 (ko) * 2001-05-19 2003-12-03 삼성전자주식회사 광디스크 재생방법 및 장치
CN1299274C (zh) * 2002-10-02 2007-02-07 松下电器产业株式会社 光盘装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54124705A (en) * 1978-03-20 1979-09-27 Teac Corp Optical reproducer
JPS5752006A (en) * 1980-08-19 1982-03-27 Olympus Optical Co Ltd Method and device for detecting focus
JPS59147306A (ja) * 1983-02-10 1984-08-23 Sony Corp フオ−カス誤差検出装置
JPS59221835A (ja) * 1983-05-31 1984-12-13 Sony Corp フオ−カス誤差検出装置
JPS601632A (ja) * 1983-06-18 1985-01-07 Mitsubishi Electric Corp 光学式情報記録再生装置
JPS6055521A (ja) * 1983-09-05 1985-03-30 Mitsubishi Electric Corp 光デイスクヘツドの自動焦点調節装置
JPS6070924U (ja) * 1983-10-19 1985-05-20 パイオニア株式会社 焦点誤差検出装置
JPS60131648A (ja) * 1983-12-19 1985-07-13 Toshiba Corp 光学ヘツド
JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置
JPS60217534A (ja) * 1984-04-11 1985-10-31 Mitsubishi Electric Corp 焦点検出装置
US4724533A (en) * 1984-06-15 1988-02-09 Matsushita Electric Industrial Co., Ltd. Optical head
US4742218A (en) * 1985-03-11 1988-05-03 Hitachi, Ltd. Focus error detection apparatus utilizing focusing an front and rear sides of focal planes
EP0261545A1 (fr) * 1986-09-17 1988-03-30 Siemens Aktiengesellschaft Dispositif détecteur pour déterminer l'erreur de focalisation d'un enregistreur optique de données
JPH0626972Y2 (ja) * 1986-10-03 1994-07-20 パイオニア株式会社 光学式ピツクアツプ装置

Also Published As

Publication number Publication date
US4920527A (en) 1990-04-24
DE3800255C2 (fr) 1990-06-28
JP2596545B2 (ja) 1997-04-02
JPS63168842A (ja) 1988-07-12
DE3800255A1 (de) 1988-08-04
FR2609348A1 (fr) 1988-07-08

Similar Documents

Publication Publication Date Title
FR2618903B1 (fr) Dispositif detecteur de la mauvaise haleine
DK235788A (da) Ultralyddetektor
DK653189D0 (da) Blodudtagningsapparatur
KR880701000A (ko) 초점 검출 장치
DE68918749T2 (de) Blutprobenröhrchen-Halter.
FI903574A0 (fi) Laite verinäytteen hyytymisajan määrittämiseksi
DE3676537D1 (de) Optisches messgeraet.
FR2617969B1 (fr) Appareil d'evaluation de contraintes
NO865328L (no) Broennapparat.
ES2016816B3 (es) Dispositivo de deteccion
DE3855744T2 (de) Sirenendetektor
FR2503042B1 (fr) Appareil d'enregistrement par points
FR2616195B1 (fr) Appareil de controle d'ecoulements fluides
FR2609348B1 (fr) Appareil de detection d'erreur de mise au point
IT1227246B (it) Procedimento per la verniciatura sottomarina e dispositivo per la sua realizazione
FR2532765B1 (fr) Dispositif de detection de position de mise au point
FR2618713B3 (fr) Dispositif de bridage
FR2589665B1 (fr) Dispositif d'etalonnage acoustique
FR2597018B1 (fr) Appareil de detection de la position d'une ligne
FR2616914B1 (fr) Dispositif d'analyse par ultrasons
FR2676837B1 (fr) Appareil de detection de mise au point.
FR2578197B1 (fr) Appareil d'enregistrement
DE3867785D1 (de) Optischer messapparat.
EP0351675A3 (en) Focusing error detecting apparatus
KR860001342A (ko) 광학식 헤드의 트랙킹 오차 검출장치

Legal Events

Date Code Title Description
D6 Patent endorsed licences of rights
ST Notification of lapse