KR850000078A - 포커스 오차 검출장치 - Google Patents

포커스 오차 검출장치 Download PDF

Info

Publication number
KR850000078A
KR850000078A KR1019840002844A KR840002844A KR850000078A KR 850000078 A KR850000078 A KR 850000078A KR 1019840002844 A KR1019840002844 A KR 1019840002844A KR 840002844 A KR840002844 A KR 840002844A KR 850000078 A KR850000078 A KR 850000078A
Authority
KR
South Korea
Prior art keywords
lens
pair
regions
photodetection
optical axis
Prior art date
Application number
KR1019840002844A
Other languages
English (en)
Other versions
KR920001112B1 (ko
Inventor
기요시 오오사또 (외 1)
Original Assignee
오오가 노리오
소니 가부시끼 가이샤
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 오오가 노리오, 소니 가부시끼 가이샤 filed Critical 오오가 노리오
Publication of KR850000078A publication Critical patent/KR850000078A/ko
Application granted granted Critical
Publication of KR920001112B1 publication Critical patent/KR920001112B1/ko

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Eye Examination Apparatus (AREA)
  • Body Structure For Vehicles (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

내용 없음.

Description

포커스 오차 검출장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 종래의 포커스 오차 검출장치의 구성을 간략하게 도시하는 배치도.
제35도 및 제36도는 본 발명에 의한 포커스 오차 검출장치에 사용하는 복합렌즈의 일예를 도시하는 각각 평면도 및 단면도.

Claims (1)

  1. 유리단렌즈 및 플라스틱 단렌즈로부터 이루는 복합렌즈와, 이 복합렌즈의 후방에 대향하여 배치된 광검출기를 가지고, 상기 유리단렌즈는 동일한 촛점거리를 가지고, 상기 플라스틱 단렌즈는 상기 복합렌즈에 대한 입사광의 광축을 포함하는 계평면으로 2분된 한쌍의 렌즈영역으로부터 이루고, 이 한쌍의 렌즈영역은 서로 상이한 후측촛점거리를 가지면서, 이 한쌍의 렌즈영역의 각 광축은 이간하게 된다. 상기 복합렌즈에 대한 입사광이 포커스 상태에 있을 때의 상기 한쌍의 렌즈영역으로부터의 각 출사광의 각 집속점의 상기 입사광의 광축상에 있어서의 중간위치에 그 광검출면이 위치하도록 상기 광검출기를 배치함과 동시에, 이 광검출기는 상기 한쌍의 렌즈영역중의 제1의 렌즈영역의 상기 계평면에 대한 바깥측 및 안쪽을 각각 통과하는 각 출사광을 수광하는 제1 및 제2의 광검출 소자와, 상기 한쌍의 렌즈영역중의 제2의 렌즈영역의 상기 계평면에 대한 바깥측 및 안쪽을 각각 통과하는 각 출사광을 수광하는 제3 및 제4의 광검출 소자로부터 구성되고, 상기 제1 및 제4의 광검출 소자로부터의 제1 및 제4의 광검출 신호의 합계와, 상기 제2 및 제3의 광검출 소자로부터의 제2 및 제3의 광검출 신호의 합계와의 차로부터 포커스 오차신호를 얻도록 한 것을 특징으로 하는 포커스 오차 검출장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019840002844A 1983-05-31 1984-05-24 포커스 오차 검출 장치 KR920001112B1 (ko)

Applications Claiming Priority (2)

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
JP96058 1983-05-31

Publications (2)

Publication Number Publication Date
KR850000078A true KR850000078A (ko) 1985-02-25
KR920001112B1 KR920001112B1 (ko) 1992-02-01

Family

ID=14154835

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840002844A KR920001112B1 (ko) 1983-05-31 1984-05-24 포커스 오차 검출 장치

Country Status (7)

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

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 (en) * 1986-12-25 1993-07-14 Nec Corporation A method and apparatus for detecting track and focus errors in an optical head
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 (ko) * 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
CA1248796A (en) 1989-01-17
US4631397A (en) 1986-12-23
KR920001112B1 (ko) 1992-02-01
DE3467447D1 (en) 1987-12-17
JPS59221835A (ja) 1984-12-13
EP0127448B1 (en) 1987-11-11
EP0127448A1 (en) 1984-12-05
ATE30799T1 (de) 1987-11-15

Similar Documents

Publication Publication Date Title
KR850000078A (ko) 포커스 오차 검출장치
KR840007956A (ko) 포우커스 오차 검출장치
KR860003526A (ko) 광전자식 포커싱 오차 검출 시스템
KR840004972A (ko) 광전자 집속에러 검출장치
JPS5576312A (en) Focus detecting system of image
KR890013481A (ko) 속도 측정 방법 및 장치
KR920012947A (ko) 2색 촛점면 어레이 센서장치
JPS5295221A (en) Detector for focusing
KR920700449A (ko) 광학 기록매체의 광학 판독 장치
EP0860684A3 (en) Tilt detecting device
KR890005491A (ko) 작은 면적 대역상의 물체의 곡률을 변화시키는 광학 시스템
KR900010683A (ko) 광 검출 장치
KR890002841A (ko) 광학 픽업장치
US4548495A (en) Proper focusing state detecting device
JPS5689005A (en) Position detector
KR900000856A (ko) 광학 헤드장치
KR920017458A (ko) 화상처리장치
JPS6298225A (ja) 熱線式検知器の光学装置
KR950015239A (ko) 포커스 에러 검출장치
JPS5766535A (en) Focus detector
JPS57198547A (en) Optical information processor
JPS57123797A (en) Motional feedback type speaker
JPS5648546A (en) Crack detector
JPS56138220A (en) Light beam detector
JPS6484119A (en) Object state detector

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20020118

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee