KR890007241A - 광학헤드 - Google Patents

광학헤드 Download PDF

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Publication number
KR890007241A
KR890007241A KR1019880013497A KR880013497A KR890007241A KR 890007241 A KR890007241 A KR 890007241A KR 1019880013497 A KR1019880013497 A KR 1019880013497A KR 880013497 A KR880013497 A KR 880013497A KR 890007241 A KR890007241 A KR 890007241A
Authority
KR
South Korea
Prior art keywords
beam splitter
light
optical head
reflected
transmitted
Prior art date
Application number
KR1019880013497A
Other languages
English (en)
Other versions
KR920003782B1 (ko
Inventor
마사히코 다나카
Original Assignee
아오이 죠이치
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
Application filed by 아오이 죠이치, 가부시키가이샤 도시바 filed Critical 아오이 죠이치
Publication of KR890007241A publication Critical patent/KR890007241A/ko
Application granted granted Critical
Publication of KR920003782B1 publication Critical patent/KR920003782B1/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
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

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

Abstract

내용 없음

Description

광학헤드
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1도는 본 발명의 제 1실시예에 따른 광학헤드의 구성도,
제 2도는 광의 편광방향과 기록매체에 설치된 기판이 장학측과의 관계를 도시해 놓은 도면.

Claims (2)

  1. 광학적 기록매체(5)에 대한 기록 및 그 기록매체(5)로 부터의 재생중 적어도 한쪽을 실행하도록 된 광학헤드에 있어서, 상기 기록매체(5)로 부터의 반사광을 반사 또는 투과시키는 제 1빔스폴리터(3)와, 이 제 1빔스폴리터(3)와 동일한 광학특성을 갖춤과 더불어 그 제 1빔스플리터(3)에 의해 반사 또는 투과된 광을 그 제 1빔스플리터(3)의 입사광과 반사광이 이루는 평면과 동일평면내에서 반사 또는 투과시켜 광검출기로 공급하는 제 2빔스플리터(9)및, 이 제 2빔스플리터(9)와 상기 제 1빔스플리터(3)의 사이에 설치되어 상기 제 1빔스플리터(3)에서 반사 또는 투과된 광의 편광방향을 90°회전시키는 1/2파장판(8)이 구비된 광학헤드.
  2. 광학적 기록매체(5)에 대한 기록 및 그 기록매체(5)로 부터의 재생중 적어도 한쪽을 실행하도록 된 광학헤드에 있어서, 상기 기록매체(5)로 부터의 반사광을 반사 또는 투과시키는 제 1빔스플리터(3)와, 이 제 1빔스플리터(3)와 동일한 광학특성을 갖춤과 더불어 그 제 1빔스플리터(3)에 의해 반사 또는 투과된 광을 그 제 1빔스플리터(3)의 입사광과 반사광이 이루는 평면과 직교하는 방향으로 반사 또는 투과시켜 괌검출기에 공급하는 제 2빔스플러터(9)가 구비된 광학헤드.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019880013497A 1987-10-16 1988-10-15 광학헤드 KR920003782B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP62-261187 1987-10-16
JP26118787 1987-10-16
JP62-296820 1987-11-25
JP62296820A JP2603973B2 (ja) 1987-10-16 1987-11-25 光学ヘッド

Publications (2)

Publication Number Publication Date
KR890007241A true KR890007241A (ko) 1989-06-19
KR920003782B1 KR920003782B1 (ko) 1992-05-14

Family

ID=26544961

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880013497A KR920003782B1 (ko) 1987-10-16 1988-10-15 광학헤드

Country Status (3)

Country Link
EP (1) EP0312403A3 (ko)
JP (1) JP2603973B2 (ko)
KR (1) KR920003782B1 (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6814297B2 (ja) 2017-08-23 2021-01-13 水道機工株式会社 汚泥処理装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2057218B (en) * 1979-06-25 1984-02-29 Olympus Optical Co Detecting focussing error
JPS598148A (ja) * 1982-07-07 1984-01-17 Toshiba Corp 光学式情報再生装置
EP0229035B1 (en) * 1986-01-08 1993-08-18 Victor Company Of Japan, Limited Optical recording/reproducing of information signals

Also Published As

Publication number Publication date
JPH01199330A (ja) 1989-08-10
EP0312403A3 (en) 1990-11-28
EP0312403A2 (en) 1989-04-19
KR920003782B1 (ko) 1992-05-14
JP2603973B2 (ja) 1997-04-23

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