KR870005356A - 광학헤드 - Google Patents

광학헤드 Download PDF

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Publication number
KR870005356A
KR870005356A KR860010186A KR860010186A KR870005356A KR 870005356 A KR870005356 A KR 870005356A KR 860010186 A KR860010186 A KR 860010186A KR 860010186 A KR860010186 A KR 860010186A KR 870005356 A KR870005356 A KR 870005356A
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KR
South Korea
Prior art keywords
light
optical
head according
optical head
pair
Prior art date
Application number
KR860010186A
Other languages
English (en)
Other versions
KR900003687B1 (ko
Inventor
히데오 안도
Original Assignee
와타리 스기이치로
가부시키가이샤 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 JP60269649A external-priority patent/JPS62129944A/ja
Priority claimed from JP61006911A external-priority patent/JPS62165744A/ja
Application filed by 와타리 스기이치로, 가부시키가이샤 도시바 filed Critical 와타리 스기이치로
Publication of KR870005356A publication Critical patent/KR870005356A/ko
Application granted granted Critical
Publication of KR900003687B1 publication Critical patent/KR900003687B1/ko

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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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1395—Beam splitters or combiners
    • 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
    • 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
    • G11B7/1359—Single prisms
    • 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

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

내용 없음

Description

광학헤드
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 1실시예에 따른 광학 헤드를 나타내는 사시도.
제7도는 본 발명의 다른 실시예에 따른 광학헤드의 광학 시스템을 단순화해서 나타내는 광학 시스템의 배치도.
제9도는 본 발명의 또다른 실시예에 따른 광학헤드의 광학시스템의 일부를 나타내는 사시도이다.
* 도면의 주요 부분에 대한 부호의 설명
1 : 반도체레이저, 2 : 조준렌즈, 3 : 편광비임스프리터, 4,5 : 프리즘, 4A : 레이저비임입사면, 5B : 레이저비임반사면, 6 : 편광비임스프리트면, 7 : 1/4 파장판, 8 : 대물렌즈, 9 : 광디스크, 9A : 트랙킹가이드, 10,11 : 광비임출현면, 12 : 투광렌즈, 13 : 광검출기, 14,15 : 광검출영역, 16 : 광검출면, 16A : 평탄면, 16B : └─┘렌즈면, 19 : 거울, 19A : 평면 거울면, 19B : 원주형 거울면, 22 : 기본프레임, L : 레이저비임, Lt : 트랙에러검출용 레이저, Lf : 비임촛점에러검출용 레이저비임

Claims (11)

  1. 광학 메모리를 사용하는 광학 시스템에 있어서, 상기 광학메모리상에 광 비임을 지향 시키는 수단과, 상기 광학 메모리로부터 전송된 합성적인 광비임을 각각 서로 다른 광선굴곡율을 갖는 제1, 제2 광비임출현면으로써 제1, 제2광 비임으로 분리하는 수단 및, 상기 제1, 제2광비임을 검출하는 수단으로 구성된 것을 특징으로 하는 광학헤드.
  2. 제1항에 있어서, 상기 검출수단은 1쌍의 제1광 검출영역과 1쌍의 제2광 검출영역을 구비하게 되고, 상기 1쌍의 제1광 검출영역으로 제1광 비임이 향해지게 되면서 상기 1쌍의 제2광검출영역으로 제2광 비임이 향해지도록 된 것을 특징으로 하는 광학헤드.
  3. 제2항에 있어서, 상기 지향수단은 광축을 구비하면서 그 광축에 따라 이동가능한 대물렌즈를 구비하게 되고, 이 대물렌즈가 광축에 따라 이동되게 되면 상기 분리수단으로 부터 출현되는 제1광비임에 따라 검출수단상에 형성되는 제1광비임스폿트가 특정방향으로 이동되게 되므로 1쌍의 제1광검출영역이 특정 방향에 따라 배치되는 것을 특징으로 하는 광학헤드.
  4. 제3항에 있어서, 상기 광학 메모리는 트랙킹 가이드를 구비하면서 1쌍의 제2광검출영역이 특정방향인 직각방향으로 배치되는 것을 특징으로 하는 광학헤드.
  5. 제4항에 있어서, 상기 검출수단은 광 비임을 대물렌즈에 전송하게 되고, 상기 광학메모리로 부터 수신된 합성적인 광 비임을 비임분리수단으로 향하게 되는 비임스플리터를 구비하여서 된 것을 특징으로 하는 광학헤드.
  6. 제5항에 있어서, 상기 비임스플리터가 비임스플리터를 유지하는 수단과 제1광비임이 편향되는 특정방향으로 배치되는 전합면을 추가로 구비한 것을 특징으로 하는 광학헤드.
  7. 제1항에 있어서, 상기 분리수단은 제1, 제2광비임 출현면이 형성된 합성적인 광비임이 전송되는 프리즘을 구비하여서 된 것을 특징으로 하는 광학헤드.
  8. 제1항에 있어서, 상기 분리수단은 제1, 제2광 비임 출현면이 형성된 합성적인 광비임을 반사하는 거울을 구비하여서 된 것을 특징으로 하는 광학헤드.
  9. 제1항에 있어서, 상기 분리수단은 제1, 제2광 비임 임출현면이 형성된 합성적인 광비임을 접속하는 렌즈를 구비하여서 된 것을 특징으로 하는 광학헤드.
  10. 제1항에 있어서, 제1광비임출현면은 └─┘면이고, 제2광비임출 현면은 평탄면인 것을 특징으로 하는 광학헤드.
  11. 제1항에 있어서, 제1광비임출현면이 원주형└─┘면인 것을 특징으로 하는 광학헤드.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019860010186A 1985-11-30 1986-11-29 광학헤드 KR900003687B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP60269649A JPS62129944A (ja) 1985-11-30 1985-11-30 光学ヘツド
JP60-269649 1985-11-30
JP61006911A JPS62165744A (ja) 1986-01-16 1986-01-16 光学ヘツド
JP61-6911 1986-01-16

Publications (2)

Publication Number Publication Date
KR870005356A true KR870005356A (ko) 1987-06-08
KR900003687B1 KR900003687B1 (ko) 1990-05-30

Family

ID=26341134

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860010186A KR900003687B1 (ko) 1985-11-30 1986-11-29 광학헤드

Country Status (4)

Country Link
US (1) US4783589A (ko)
EP (1) EP0224853B1 (ko)
KR (1) KR900003687B1 (ko)
DE (1) DE3683833D1 (ko)

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US5270996A (en) * 1986-12-25 1993-12-14 Nec Corporation Optical head with diffraction grating producing five diffracted detection light beams
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US5070493A (en) * 1989-05-22 1991-12-03 Hewlett-Packard Company Wedge prism assembly for optical information storage
JP2781625B2 (ja) * 1989-12-13 1998-07-30 株式会社日立製作所 情報処理装置
JP2617237B2 (ja) * 1990-08-28 1997-06-04 シャープ株式会社 光スポット位置検出装置
JP3736812B2 (ja) * 1994-06-13 2006-01-18 パイオニア株式会社 光学式ピックアップ装置
US5991102A (en) * 1994-11-25 1999-11-23 Asahi Kogaku Kogyo Kabushiki Kaisha Beam protecting device
JP2001034999A (ja) * 1999-05-14 2001-02-09 Fujitsu Ltd 光情報記憶装置および光学素子
EP1067523A3 (en) * 1999-06-30 2007-05-23 Sharp Kabushiki Kaisha Optical disc having pits of different depth formed therein, optical disc device for reproduction the same, and method of reproduction
KR100813943B1 (ko) * 2001-04-30 2008-03-14 삼성전자주식회사 복합 반사프리즘 및 이를 채용한 광픽업장치
TWI406025B (zh) 2010-11-25 2013-08-21 Ind Tech Res Inst 自動聚焦裝置及方法

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Also Published As

Publication number Publication date
DE3683833D1 (de) 1992-03-19
KR900003687B1 (ko) 1990-05-30
US4783589A (en) 1988-11-08
EP0224853A3 (en) 1988-07-13
EP0224853B1 (en) 1992-02-05
EP0224853A2 (en) 1987-06-10

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