DE3467447D1 - Focussing error detecting apparatus - Google Patents

Focussing error detecting apparatus

Info

Publication number
DE3467447D1
DE3467447D1 DE8484303523T DE3467447T DE3467447D1 DE 3467447 D1 DE3467447 D1 DE 3467447D1 DE 8484303523 T DE8484303523 T DE 8484303523T DE 3467447 T DE3467447 T DE 3467447T DE 3467447 D1 DE3467447 D1 DE 3467447D1
Authority
DE
Germany
Prior art keywords
lens
photo
light
detector
interface
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
Application number
DE8484303523T
Other languages
English (en)
Inventor
Kiyoshi Ohsato
Shigeo Kubota
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE3467447D1 publication Critical patent/DE3467447D1/de
Expired 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
    • G11B7/0912—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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
DE8484303523T 1983-05-31 1984-05-24 Focussing error detecting apparatus Expired DE3467447D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58096058A JPS59221835A (ja) 1983-05-31 1983-05-31 フオ−カス誤差検出装置

Publications (1)

Publication Number Publication Date
DE3467447D1 true DE3467447D1 (en) 1987-12-17

Family

ID=14154835

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484303523T Expired DE3467447D1 (en) 1983-05-31 1984-05-24 Focussing error detecting apparatus

Country Status (7)

Country Link
US (1) US4631397A (de)
EP (1) EP0127448B1 (de)
JP (1) JPS59221835A (de)
KR (1) KR920001112B1 (de)
AT (1) ATE30799T1 (de)
CA (1) CA1248796A (de)
DE (1) DE3467447D1 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132242A (ja) * 1985-12-04 1987-06-15 Hitachi Ltd 光デイスク装置
US4853923A (en) * 1985-12-12 1989-08-01 Nikon Corporation Maneto-optical recording apparatus with path length compensated dual photo-electric conversion
US5231621A (en) * 1986-09-05 1993-07-27 Canon Kabushiki Kaisha Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point
NL8603108A (nl) * 1986-12-08 1988-07-01 Philips Nv Mikroskoop.
EP0273422B1 (de) * 1986-12-25 1993-07-14 Nec Corporation Verfahren und Gerät zur Erfassung von Ausrichtungs- und Fokusfehlern in einem optischen Kopf
JP2596545B2 (ja) * 1987-01-07 1997-04-02 パイオニア株式会社 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
US4891799A (en) * 1987-03-13 1990-01-02 Fuji Electrochemical Co., Ltd. Optical head apparatus for writing and reading data on an optical disk having a lens with an inclined optical axis
US5099109A (en) * 1987-08-05 1992-03-24 Alps Electric Co., Ltd. Optical reader with reduced regular reflection errors
JPH0361811A (ja) * 1989-07-31 1991-03-18 Canon Inc 測距装置
CA2115859C (en) * 1994-02-23 1995-12-26 Brian Dewan Method and apparatus for optimizing sub-pixel resolution in a triangulation based distance measuring device
US5566151A (en) * 1995-06-07 1996-10-15 International Business Machines Corporation Optical devices having array detectors with light receiving photo arrays larger than an incident laser beam cross-section
US6259668B1 (en) * 1996-02-14 2001-07-10 Samsung Electronics Co., Ltd. Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
US6222812B1 (en) 1996-08-29 2001-04-24 Samsung Electronics Co., Ltd. Optical pickup using an optical phase plate
US6639889B1 (en) 1997-02-13 2003-10-28 Samsung Electronics Co., Ltd. Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats
US6304540B1 (en) * 1998-03-30 2001-10-16 Samsung Electronics Co., Ltd. Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
US6563779B1 (en) 1999-06-16 2003-05-13 Siros Technologies, Inc. Tracking error signal generation using confocally filtered detection
US6624403B2 (en) * 2001-10-11 2003-09-23 Therma-Wave, Inc. Autofocus system
KR20030093683A (ko) * 2002-06-05 2003-12-11 삼성전자주식회사 호환형 광픽업
JP2004226948A (ja) * 2002-11-29 2004-08-12 Olympus Corp 光学機器の照明装置
JP4557281B2 (ja) * 2004-02-16 2010-10-06 株式会社リコー 光ピックアップ装置及び光ディスク装置
JP4133884B2 (ja) * 2004-03-18 2008-08-13 株式会社ミツトヨ 光学的変位測定器
JP4212522B2 (ja) * 2004-07-06 2009-01-21 太陽誘電株式会社 ピックアップ装置
US8931927B2 (en) 2011-06-09 2015-01-13 Light Engine Limited Faceted folded-optic collimator
US20150340396A1 (en) * 2014-05-24 2015-11-26 Vladislav Blayvas Image sensor with dispersive color separation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311326A2 (fr) * 1974-01-15 1976-12-10 Thomson Brandt Dispositif de focalisation et lecteur optique comportant un tel dispositif
NL7413044A (nl) * 1974-10-03 1976-04-06 Philips Nv Registratiedrager waarop een televisiesignaal is opgeslagen.
GB1532345A (en) * 1976-06-25 1978-11-15 Hitachi Ltd Information play-back apparatus
JPS5690434A (en) * 1979-12-19 1981-07-22 Hitachi Ltd Optical information reproducing device
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
FR2498752B1 (fr) * 1981-01-23 1985-07-05 Thomson Csf Dispositif optique d'enregistrement lecture d'un support d'information comportant deux sources laser de longueurs d'ondes differentes
JPS57195634U (de) * 1981-06-05 1982-12-11
JPS5897140A (ja) * 1981-12-04 1983-06-09 Victor Co Of Japan Ltd 光学的情報信号再生装置
JPS59147306A (ja) * 1983-02-10 1984-08-23 Sony Corp フオ−カス誤差検出装置

Also Published As

Publication number Publication date
JPS59221835A (ja) 1984-12-13
US4631397A (en) 1986-12-23
ATE30799T1 (de) 1987-11-15
CA1248796A (en) 1989-01-17
EP0127448B1 (de) 1987-11-11
KR850000078A (ko) 1985-02-25
KR920001112B1 (ko) 1992-02-01
EP0127448A1 (de) 1984-12-05

Similar Documents

Publication Publication Date Title
DE3467447D1 (en) Focussing error detecting apparatus
DE3665103D1 (en) Opto-electronic module
DE3564217D1 (en) Microlens manufacture
NL189960C (nl) Cesium-bevattend optisch glas, licht-convergerende lens.
SE9000210D0 (sv) Solstraalningsanordning foer illuminering
JPS6453353A (en) Apparatus for scanning information plane optically
GB1449519A (en) Light-sensitive sorting machine
ES2025340B3 (es) Giroscopio de fibras.
JPS5689005A (en) Position detector
JPS5611439A (en) Focus detector of camera
SE8703674L (sv) Infraroett, bifokalt, optiskt system
JPS56156810A (en) Optical connector
AU8030891A (en) Temperature measuring device
JPS6439576A (en) Radiation position detector
JPS57158804A (en) Optical path splitting prism and its production
JPS5669606A (en) Focus detector
GB1502423A (en) Optical coupling devices
JPS57186854A (en) Optical transmitting device
JPS5758114A (en) Optical communication device
JPS5635568A (en) Optical reading device
JPS6446242A (en) Optical pickup
JPS5790625A (en) Image pickup device
JPS5611629A (en) Focus detector for optical information reproducing unit
JPS5544926A (en) Article surface fault detector
JPS57189106A (en) Focus detector

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee