KR900010683A - 광 검출 장치 - Google Patents

광 검출 장치 Download PDF

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Publication number
KR900010683A
KR900010683A KR1019890019862A KR890019862A KR900010683A KR 900010683 A KR900010683 A KR 900010683A KR 1019890019862 A KR1019890019862 A KR 1019890019862A KR 890019862 A KR890019862 A KR 890019862A KR 900010683 A KR900010683 A KR 900010683A
Authority
KR
South Korea
Prior art keywords
light
photodetector
optical
axis
limiting
Prior art date
Application number
KR1019890019862A
Other languages
English (en)
Other versions
KR930001432B1 (ko
Inventor
히데오 안도
Original Assignee
아오이 죠이찌
가부시끼가이샤 도시바
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
Priority claimed from JP63327580A external-priority patent/JPH02173938A/ja
Priority claimed from JP63327584A external-priority patent/JPH02173942A/ja
Priority claimed from JP63327582A external-priority patent/JPH02173940A/ja
Priority claimed from JP63327583A external-priority patent/JPH02173941A/ja
Application filed by 아오이 죠이찌, 가부시끼가이샤 도시바 filed Critical 아오이 죠이찌
Publication of KR900010683A publication Critical patent/KR900010683A/ko
Application granted granted Critical
Publication of KR930001432B1 publication Critical patent/KR930001432B1/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
    • 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B7/08—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
    • 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)
  • Optical Head (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

내용 없음

Description

광 검출 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (8)

  1. 정보기록 매체에서 반사광을 인도하는 광학장치를 구비하는 광 검출장치에 있어서, 전술한 광학장치에서의 광을 제1축에 대해 비대칭인 형상으로 제한하는 광형상 제어장치(20) 및 전술한 광 형상 제한장치(20)에서의 광을 전술한 제1축과 수직인 제2축방향으로 집광하는 집광장치(24)를 설치한 것을 특징으로 하는 광검출장치.
  2. 제1항에 있어서, 전술한 광 형상 제한장치는 투광성의 제1부분(20a)(20b)(20e)(29f) 및 차광성의 제2의부분(20c)(20d)를 갖는 광형상 제한부재(20)인 것을 특징으로 하는 광검출장치.
  3. 제1항에 있어서, 전술한 광형상 제한장치는 광반사성의 제1부분(120a)(120b) 및 광 비반사성의 제2부분(120c)(120d)를 갖는 광 형상 제한 미러(120)인 것을 특징으로 하는 광검출장치.
  4. 정보 기록 매체로 부터 반사광을 인도하는 광학장치를 구비하는 광 검출장치에 있어서, 수직축 및 수평축을 가지고, 또 투광성의 제1부분(20a)(20b)(20e)(20f) 및 차광성의 제2부분(20c)(20d)를 갖는 광형상 제한부재(20), 전술한 광 형상 제한장치(20)에서의 광을 광검출기(20)로 집광하는 집광렌즈(22) 및 전술한 집광렌즈(22)와 전술한 광 검출기(26)와의 사이에 설치된 원통렌즈(24)를 설치한 것을 특징으로 하는 광검출장치.
  5. 제4항에 있어서, 전술한 광 형상 제한부재(20)의 전술한 제부분(20a)(20b)(20e)(20f) 및 전술한 제2부분(20c)(20d)은 전술한 수직축 또는 수평축에 대해 각각 비대칭인 것을 특징으로 하는 광검출장치.
  6. 제4항에 있어서, 전술한 광 형상 제한부재(20)의 전술한 수직축은 전술한 원통렌즈(24)의 중심축과 평행인 것을 특징으로 하는 광검출장치.
  7. 제4항에 있어서, 전술한 광형상 제한부재(20)는 전술한 집광렌즈(22)와 일체로 구성되어 있는 것을 특징으로 하는 광 검출장치.
  8. 정보 기록 매체로 부터 반사광을 인도하는 광학장치를 구비하는 광 검출장치에 있어서, 수직축 및 수평축을 가지고 또 광 반사성의 제1부분(120a)(120b) 및 광비반사성의 제1부분(120c)(120d)를 갖는 미러(12), 전술한 미러(120)에서의 광을 광검출기(26)으로 집광하는 집광렌즈(22) 및 전술한 집광렌즈(22)와 전술한 광검출기(26)와의 사이에 설치된 원통렌즈(24)를 설치한 것을 특징으로 하는 광검출장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890019862A 1988-12-27 1989-12-27 광 검출장치 KR930001432B1 (ko)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP63-327583 1988-12-27
JP63327580A JPH02173938A (ja) 1988-12-27 1988-12-27 光検出装置
JP63-327582 1988-12-27
JP63-327580 1988-12-27
JP63327584A JPH02173942A (ja) 1988-12-27 1988-12-27 光検出装置
JP63327582A JPH02173940A (ja) 1988-12-27 1988-12-27 光検出装置
JP63327583A JPH02173941A (ja) 1988-12-27 1988-12-27 光検出装置
JP63-327584 1988-12-27
JP88-327580 1988-12-27
JP88-327583 1989-12-27
JP88-327584 1989-12-27
JP88-327582 1989-12-27

Publications (2)

Publication Number Publication Date
KR900010683A true KR900010683A (ko) 1990-07-09
KR930001432B1 KR930001432B1 (ko) 1993-02-27

Family

ID=27480395

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890019862A KR930001432B1 (ko) 1988-12-27 1989-12-27 광 검출장치

Country Status (3)

Country Link
US (1) US5036185A (ko)
EP (1) EP0376708A3 (ko)
KR (1) KR930001432B1 (ko)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02201741A (ja) * 1989-01-31 1990-08-09 Toshiba Corp フォーカス検出装置
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
JP3112735B2 (ja) * 1992-02-28 2000-11-27 パイオニア株式会社 光ピックアップ装置
US5353272A (en) * 1992-12-29 1994-10-04 Eastman Kodak Company Apparatus and method for a modified half-aperture focus/tracking/data sensor system
JPH07311961A (ja) * 1994-05-16 1995-11-28 Nippon Steel Corp 光ピックアップ
DE69612572T2 (de) * 1995-10-27 2001-08-09 Matsushita Electric Ind Co Ltd Optischer kopf
DE19638878A1 (de) * 1996-09-23 1998-03-26 Thomson Brandt Gmbh Aufzeichnungs- oder Wiedergabegerät zum Aufzeichnen auf oder Wiedergeben von einem optischen Aufzeichnungsträger
EP0951014A3 (en) * 1998-04-14 2000-02-23 Deutsche Thomson-Brandt Gmbh Device for reading from or writting to optical recording media
JP3781982B2 (ja) * 2000-12-06 2006-06-07 三菱電機株式会社 半導体レーザ装置
JP3930784B2 (ja) * 2001-09-17 2007-06-13 シャープ株式会社 傾斜量検出装置
EP1440347B1 (en) * 2001-10-16 2007-01-03 Koninklijke Philips Electronics N.V. Optical scanning device
JP2004079030A (ja) * 2002-08-12 2004-03-11 Sony Corp ディスクドライブ装置、アドレス検出方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2271590B1 (ko) * 1974-01-15 1978-12-01 Thomson Brandt
US4079247A (en) * 1975-05-16 1978-03-14 Claude Bricot Optical focussing device
FR2325953A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur
DE3280137D1 (de) * 1981-09-17 1990-04-19 Toshiba Kawasaki Kk Ein optischer kopf.
US4441175A (en) * 1982-01-25 1984-04-03 Magnetic Peripherals Inc. Partial beam focus sensing in an optical recording system
JPS58193335U (ja) * 1982-06-17 1983-12-22 パイオニア株式会社 フオ−カスエラ−検出装置
JPS5990237A (ja) * 1982-11-16 1984-05-24 Toshiba Corp 光学ヘツド
US4604739A (en) * 1984-04-16 1986-08-05 International Business Machines Corporation Optical focus detection employing rotated interference patterns
JPS61236035A (ja) * 1985-04-09 1986-10-21 Sony Corp 光学ヘツド
JPS629537A (ja) * 1985-07-08 1987-01-17 Pioneer Electronic Corp 光学式ピツクアツプ装置
EP0255305B1 (en) * 1986-07-28 1993-01-07 Sharp Kabushiki Kaisha Focusing error detecting device and method of manufacturing the same
US4816665A (en) * 1987-08-06 1989-03-28 Maxtor Corporation Sensor array for focus detection

Also Published As

Publication number Publication date
US5036185A (en) 1991-07-30
EP0376708A3 (en) 1991-10-23
KR930001432B1 (ko) 1993-02-27
EP0376708A2 (en) 1990-07-04

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