KR840007956A - 포우커스 오차 검출장치 - Google Patents

포우커스 오차 검출장치 Download PDF

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Publication number
KR840007956A
KR840007956A KR1019840000629A KR840000629A KR840007956A KR 840007956 A KR840007956 A KR 840007956A KR 1019840000629 A KR1019840000629 A KR 1019840000629A KR 840000629 A KR840000629 A KR 840000629A KR 840007956 A KR840007956 A KR 840007956A
Authority
KR
South Korea
Prior art keywords
lens
pair
plane
focus error
photodetector
Prior art date
Application number
KR1019840000629A
Other languages
English (en)
Other versions
KR920006413B1 (ko
Inventor
기요시 오오사또
Original Assignee
오오가노리오
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 오오가노리오, 소니 가부시끼 가이샤 filed Critical 오오가노리오
Publication of KR840007956A publication Critical patent/KR840007956A/ko
Application granted granted Critical
Publication of KR920006413B1 publication Critical patent/KR920006413B1/ko

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • 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
    • 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
    • G11B7/0916—Foucault or knife-edge methods

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Optical Head (AREA)

Abstract

내용 없음.

Description

포우커스 오차 검출장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 종래의 포우커스 오차 검출장치의 구성을 간략하게 표시한 배치도.
제4도는종래의 다른 포우커스 오차 검출장치의 한예의구성을 간략하게 표시한 배치도.
제25도는 각각 본 발명에 의한 포우커스 오차 검출장치에 쓰는 복합렌즈의 예를 표시한 단면도.

Claims (1)

  1. 복합렌즈와 그 복합렌즈의 후방에 대향하여 배치된 광검출기를 보유하고, 상기 복합렌즈는 그 복합렌즈에 대한 입사광의 광축을 포함하는 계평면에서 2분된 한쌍의 렌즈영역으로부터 이루어지고 그 한쌍의 렌즈영역은 상호 다른 후측 초점거리가 있음과 함께 그 한쌍의 렌즈영역의 각 광축은 이간케되어 상기 복합렌즈에 대한 입사광이 포우커스 상태에 있는때의 상기 한쌍의 렌즈영역으로부터의 각 출사광의 각 집속점의 상기 입사광의 광축상에 있어서의 중간위치에 그 광검출면이 위치토록 상기 광검출기를 배치함과 함께, 그 광검출기는 상기 한쌍의 렌즈영역중의 제1렌즈영역의 상기 계평면에 대한 외측 및 내측을 각각 통과하는 각 출사광을 수광하는 제1 및 제2의 광검출소자와, 상기 한쌍의 렌즈영역중의 제2의 렌즈영역의 상기 계평면에 대한 외측 및 내측을 각각 통과하는 각 출사광을 수광하는 제3 및 제4의 광검출소자로부터 구성되고, 상기 제1 및 제4의 광검출소자에서의 제1 및 제4의 광검출신호의 합과 상기 제2 및 제3의 광검출소자에서의 제2 및 제3의 광검출신호의 합과의 차에서 포우커스 오차신호를 얻도록 한 것을 특징으로 하는 포우커스 오차 검출장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019840000629A 1983-02-10 1984-02-10 포우커스 오차 검출 장치 KR920006413B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP58-21187 1983-02-10
JP21187 1983-02-10
JP58021187A JPS59147306A (ja) 1983-02-10 1983-02-10 フオ−カス誤差検出装置

Publications (2)

Publication Number Publication Date
KR840007956A true KR840007956A (ko) 1984-12-11
KR920006413B1 KR920006413B1 (ko) 1992-08-06

Family

ID=12047943

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840000629A KR920006413B1 (ko) 1983-02-10 1984-02-10 포우커스 오차 검출 장치

Country Status (7)

Country Link
US (1) US4612437A (ko)
EP (1) EP0121989B1 (ko)
JP (1) JPS59147306A (ko)
KR (1) KR920006413B1 (ko)
AU (1) AU566428B2 (ko)
CA (1) CA1246910A (ko)
DE (1) DE3464806D1 (ko)

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JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置
US4724533A (en) * 1984-06-15 1988-02-09 Matsushita Electric Industrial Co., Ltd. Optical head
NL8403034A (nl) * 1984-10-05 1986-05-01 Philips Nv Opto-elektronisch fokusfout-detektiestelsel.
DE3683833D1 (de) * 1985-11-30 1992-03-19 Toshiba Kawasaki Kk Optischer kopf.
JPH0648543B2 (ja) * 1985-12-04 1994-06-22 三菱電機株式会社 光学ヘツド装置
US4853923A (en) * 1985-12-12 1989-08-01 Nikon Corporation Maneto-optical recording apparatus with path length compensated dual photo-electric conversion
US4843222A (en) * 1986-05-29 1989-06-27 Eastman Kodak Company Bar code reader for reading bar code symbols at different distances
US4752799A (en) * 1986-07-07 1988-06-21 Honeywell Inc. Optical proximity sensing optics
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
DE3855936T2 (de) * 1987-08-24 1998-01-02 Sharp Kk Optische Abtastvorrichtung
GB8724575D0 (en) * 1987-10-20 1987-11-25 Renishaw Plc Focus detection system
JPH0827961B2 (ja) * 1987-11-11 1996-03-21 日本電気ホームエレクトロニクス株式会社 ホログラム式光ヘッドの光検出器
US4843603A (en) * 1988-03-11 1989-06-27 Optotech, Inc. Concentric photodetector arrangement for focusing and tracking
US4978860A (en) * 1988-09-21 1990-12-18 Hewlett-Packard Company Optical system for a large depth-of-field bar code scanner
NL8802988A (nl) * 1988-12-05 1990-07-02 Philips Nv Inrichting voor het met optische straling aftasten van een informatievlak.
US4998011A (en) * 1989-11-17 1991-03-05 Applied Magnetics Corporation Flat plate focus sensing apparatus
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
JPH04364231A (ja) * 1991-01-07 1992-12-16 Toshiba Corp 光学ヘッド装置
US5281802A (en) * 1991-02-20 1994-01-25 Ricoh Company, Ltd. Focus error signal detection device with separating prism
US5255139A (en) * 1991-03-18 1993-10-19 Applied Magnetics Corporation Ferrite capped Winchester-style slider
US5210929A (en) * 1991-03-18 1993-05-18 Applied Magnetics Corporation Method of making a ferrite capped Winchester-style slider
US5568315A (en) * 1991-05-28 1996-10-22 Discovision Associates Optical beamsplitter
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
KR100200828B1 (ko) * 1994-07-30 1999-06-15 윤종용 포커스에러 검출장치
US5814803A (en) * 1994-12-23 1998-09-29 Spectra-Physics Scanning Systems, Inc. Image reader with multi-focus lens
US5770847A (en) * 1994-12-23 1998-06-23 Spectra-Physics Scanning Systems, Inc. Bar code reader with multi-focus lens
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
KR100369467B1 (ko) * 1998-11-17 2003-04-03 삼성전자 주식회사 광픽업장치
US6163415A (en) * 1999-04-02 2000-12-19 Siros Technologies, Inc. Loading and unloading a flying lens
US6563779B1 (en) 1999-06-16 2003-05-13 Siros Technologies, Inc. Tracking error signal generation using confocally filtered detection
JP3818820B2 (ja) * 2000-03-06 2006-09-06 パイオニア株式会社 光学式ディスクプレーヤのサーボ制御装置
KR20030093683A (ko) * 2002-06-05 2003-12-11 삼성전자주식회사 호환형 광픽업
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JPS5897140A (ja) * 1981-12-04 1983-06-09 Victor Co Of Japan Ltd 光学的情報信号再生装置
JPS58155527A (ja) * 1982-03-10 1983-09-16 Hitachi Ltd 光デイスクプレ−ヤのフオ−カス引き込み回路

Also Published As

Publication number Publication date
CA1246910A (en) 1988-12-20
AU566428B2 (en) 1987-10-22
EP0121989B1 (en) 1987-07-15
AU2402484A (en) 1984-08-16
JPS59147306A (ja) 1984-08-23
KR920006413B1 (ko) 1992-08-06
US4612437A (en) 1986-09-16
EP0121989A1 (en) 1984-10-17
DE3464806D1 (en) 1987-08-20

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