FR2619241B1 - Procede et dispositif de controle de la mise au point, notamment pour le lecteur de disque optique numerique - Google Patents

Procede et dispositif de controle de la mise au point, notamment pour le lecteur de disque optique numerique

Info

Publication number
FR2619241B1
FR2619241B1 FR8810682A FR8810682A FR2619241B1 FR 2619241 B1 FR2619241 B1 FR 2619241B1 FR 8810682 A FR8810682 A FR 8810682A FR 8810682 A FR8810682 A FR 8810682A FR 2619241 B1 FR2619241 B1 FR 2619241B1
Authority
FR
France
Prior art keywords
control method
optical disc
disc drive
focus control
digital optical
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
FR8810682A
Other languages
English (en)
Other versions
FR2619241A1 (fr
Inventor
Kwei-Sun Hsu Sunny
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.)
Maxtor Corp
Original Assignee
Maxtor 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 Maxtor Corp filed Critical Maxtor Corp
Publication of FR2619241A1 publication Critical patent/FR2619241A1/fr
Application granted granted Critical
Publication of FR2619241B1 publication Critical patent/FR2619241B1/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
    • 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
    • G11B7/12—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
    • G11B7/1372—Lenses
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Head (AREA)
FR8810682A 1987-08-06 1988-08-08 Procede et dispositif de controle de la mise au point, notamment pour le lecteur de disque optique numerique Expired - Fee Related FR2619241B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/082,806 US4816665A (en) 1987-08-06 1987-08-06 Sensor array for focus detection

Publications (2)

Publication Number Publication Date
FR2619241A1 FR2619241A1 (fr) 1989-02-10
FR2619241B1 true FR2619241B1 (fr) 1994-04-01

Family

ID=22173585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8810682A Expired - Fee Related FR2619241B1 (fr) 1987-08-06 1988-08-08 Procede et dispositif de controle de la mise au point, notamment pour le lecteur de disque optique numerique

Country Status (4)

Country Link
US (1) US4816665A (fr)
JP (1) JPH01138623A (fr)
FR (1) FR2619241B1 (fr)
NL (1) NL8801960A (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416755A (en) * 1985-02-28 1995-05-16 Canon Kabushiki Kaisha Optical pickup using split beams impinging on different photo-detector areas
JP2887273B2 (ja) * 1987-05-22 1999-04-26 パイオニア株式会社 光学式ピックアップ装置
JPS63311630A (ja) * 1987-06-12 1988-12-20 Csk Corp カ−ド型光記録媒体用光検出器
GB8724575D0 (en) * 1987-10-20 1987-11-25 Renishaw Plc Focus detection system
US5036185A (en) * 1988-12-27 1991-07-30 Kabushiki Kaisha Toshiba Optical apparatus for detecting a focusing state
JP2650124B2 (ja) * 1989-07-11 1997-09-03 三菱電機株式会社 半導体集積回路
US5113065A (en) * 1990-09-10 1992-05-12 United Technologies Corporation Heterodyne circular photodetector array in a tracking system
US5216562A (en) * 1990-09-25 1993-06-01 International Business Machines Corporation Multi-beam optical recording system and method
US5253236A (en) * 1991-10-03 1993-10-12 International Business Machines Corporation Optical beam focusing and tracking system for an optical disk information storage device
DE69229451T2 (de) * 1991-11-20 1999-10-07 Sony Corp Optische Abtasteinrichtung
JP3363235B2 (ja) * 1994-02-17 2003-01-08 コニカ株式会社 画像形成装置の光ビームずれ検出装置
US6058223A (en) * 1996-06-27 2000-05-02 The Johns Hopkins University Video-centroid integrated circuit
KR100234257B1 (ko) * 1995-08-30 1999-12-15 윤종용 대물렌즈 장치 및 안정된 포커스 서보 신호를 얻는방법 및 이를 적용한 광픽업 장치 및 두께가 다른 디스크를 판별하는 방법 및 두께가 다른 디스크로부터 정보를 재생하고 기록하는 방법
USRE39025E1 (en) * 1995-08-30 2006-03-21 Samsung Electronics Co., Ltd. Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device
US5907530A (en) * 1995-08-30 1999-05-25 Samsung Electronics Co., Ltd. Optical pickup device
US5708634A (en) * 1995-09-20 1998-01-13 Zen Research N.V. Focussing system and methods for multi-track optical disk apparatus
KR100200857B1 (ko) * 1995-10-04 1999-06-15 윤종용 광픽업장치
GB2307548A (en) * 1995-11-23 1997-05-28 Thomson Multimedia Sa Optical disk pickup using a six segment photodetector for tracking control
IT1290576B1 (it) * 1997-03-07 1998-12-10 Cise Spa Dispositivo per la rilevazione di parametri ottici di un fascio laser
US6620957B1 (en) 1999-12-03 2003-09-16 Toyo Gosei Kogyo Co., Ltd. Process for producing onium salt derivative and novel onium salt derivative
US20070115782A1 (en) * 2003-12-23 2007-05-24 Koninklijke Philips Electronic, N.V. Optical pick-up unit
TWI411860B (zh) * 2009-12-09 2013-10-11 Ind Tech Res Inst 聚焦定位判定方法
US8459554B2 (en) * 2010-11-30 2013-06-11 Stmicroelectronics S.R.L. Large area monitoring device
US9716847B1 (en) 2012-09-25 2017-07-25 Google Inc. Image capture device with angled image sensor
CN103760570B (zh) * 2014-02-18 2016-01-20 北京理工大学 一种基于仿人眼视觉机理的激光三维成像系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567245A (en) * 1979-06-26 1981-01-24 Victor Co Of Japan Ltd Automatic focusing unit in optical information reproducing device
JPS5647931A (en) * 1979-09-21 1981-04-30 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
US4458144A (en) * 1981-06-30 1984-07-03 Storage Technology Corporation Apparatus for reading information stored in a track pattern on a radiation reflecting record
JPS58200440A (ja) * 1982-05-19 1983-11-22 Sony Corp 光学的読取装置
JPS58208944A (ja) * 1982-05-31 1983-12-05 Sony Corp 光学ヘツド制御信号発生装置
JPS58220248A (ja) * 1982-06-15 1983-12-21 Nippon Kogaku Kk <Nikon> 光学式ピツクアツプ
JPS5956230A (ja) * 1982-09-24 1984-03-31 Toshiba Corp 光学的情報読取装置
JPS601737A (ja) * 1983-06-17 1985-01-07 Hitachi Ltd 撮像素子フレア防止構造
EP0137272B1 (fr) * 1983-09-05 1991-06-19 Mitsubishi Denki Kabushiki Kaisha Dispositif de focalisation automatique
JPS6066336A (ja) * 1983-09-21 1985-04-16 Ricoh Co Ltd 光情報検出装置
JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置

Also Published As

Publication number Publication date
FR2619241A1 (fr) 1989-02-10
US4816665A (en) 1989-03-28
JPH01138623A (ja) 1989-05-31
NL8801960A (nl) 1989-03-01

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Legal Events

Date Code Title Description
ST Notification of lapse