KR950034123A - 광자기디스크재생시스템의 광픽업헤드 - Google Patents

광자기디스크재생시스템의 광픽업헤드 Download PDF

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Publication number
KR950034123A
KR950034123A KR1019940011850A KR19940011850A KR950034123A KR 950034123 A KR950034123 A KR 950034123A KR 1019940011850 A KR1019940011850 A KR 1019940011850A KR 19940011850 A KR19940011850 A KR 19940011850A KR 950034123 A KR950034123 A KR 950034123A
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KR
South Korea
Prior art keywords
magneto
optical
reflected
pickup head
optical pickup
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KR1019940011850A
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English (en)
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KR0136843B1 (ko
Inventor
김진태
Original Assignee
배순훈
대우전자 주식회사
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Priority to KR1019940011850A priority Critical patent/KR0136843B1/ko
Publication of KR950034123A publication Critical patent/KR950034123A/ko
Application granted granted Critical
Publication of KR0136843B1 publication Critical patent/KR0136843B1/ko

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    • 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
    • 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
    • G11B11/11—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, e.g. of electrons or X-rays other than a beam of light or a magnetic field for recording
    • 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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • 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
    • G11B7/1362—Mirrors

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

Abstract

본 발명은 광자기디스크재생헤드의 광픽업헤드에 관한 것으로, 자기적 성질과 광학적 성질을 이용하여 자기헤드에 의해 기록된 광자기 디스크(D)상의 정보를 재생하는 광픽업헤드를 갖춘 광자기디스크재생시스템에 있어서, 상기 광픽업헤드는 상기 광자기 디스크(D)의 표면에 조사되는 레이저비임을 발생하는 레이저광원(50)과, 상기 레이저광원(50)에서 발생되는 레이저비임을 대물렌즈(54)를 통해 상기 광자기 디스크(D)상에 조사되도록 반사하는 반사면(52), 상기 광자기 디스크(D)에서 반사되는 반사광을 조정된 편광율로 반사시키고 그 조정된 편광율로 반사된 편광성분을 수광소자측으로 입사되도록 하는 PBS블럭(56), 상기 PBS블럭(56)에서 조정된 편광율로 반사되는 편광성분을 반사시키는 반사막코팅막(60), 상기 편광성분을 수광하는 수광소자(64)를 갖추어 구성된 것이다.

Description

광자기디스크재생시스템의 광픽업헤드
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 본 발명에 따른 광자기디스크재생시스템의 광픽업헤드의 구성을 설명하는 도면이다.

Claims (3)

  1. 자기적 성질과 광학적 성질을 이용하여 자기헤드에 의해 기록된 광자기 디스크(D)상의 정보를 재생하는 광픽업헤드를 갖춘 광자기디스크재생시스템에 있어서, 상기 광픽업헤드는 상기 광자기 디스크(D)의 표면에 조사되는 레이저비임을 발생하는 레이저광원(50)과, 상기 레이저광원(50)에서 발생되는 레이저비임을 대물렌즈(54)를 통해 상기 광자기 디스크(D)상에 조사되도록 반사하는 반사면(52), 상기 광자기 디스크(D)에서 반사되는 반사광을 조정된 편광율로 반사시키고 그 조정된 편광율을 반사된 편광성분을 수광소자측으로 입사되도록 하는 PBS블럭(56), 상기 PBS(56)에서 조정된 편광율로 반사되는 편광성분을 반사시키는 반사막코팅막(60), 상기 편광성분을 수광하는 수광소자(64)를 갖추어 구성된 것을 특징으로 하는 광자기 디스크재생시스템의 광픽업헤드.
  2. 제1항에 있어서, 상기 PBS블럭(56)은 복수의 편광층이 도포되어 편광율이 조정되도록 형성된 것을 특징으로 하는 광자기 디스크재생시스템의 광픽업헤드.
  3. 제1항에 있어서, 상기 반사면(52)에서 반사되는 초기의 레이저비임을 수광하여 레이저광원의 발진파장을 검출하는 모니터링 수광소자(66)가 더 구비되어 구성된 것을 특징으로 하는 광자기 디스크재생시스템의 광픽업헤드.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940011850A 1994-05-30 1994-05-30 광자기디스크재생시스템의 광픽업헤드 KR0136843B1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940011850A KR0136843B1 (ko) 1994-05-30 1994-05-30 광자기디스크재생시스템의 광픽업헤드

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940011850A KR0136843B1 (ko) 1994-05-30 1994-05-30 광자기디스크재생시스템의 광픽업헤드

Publications (2)

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KR950034123A true KR950034123A (ko) 1995-12-26
KR0136843B1 KR0136843B1 (ko) 1998-05-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438290B1 (ko) * 2001-09-13 2004-07-02 엘지전자 주식회사 광픽업 장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438290B1 (ko) * 2001-09-13 2004-07-02 엘지전자 주식회사 광픽업 장치

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Publication number Publication date
KR0136843B1 (ko) 1998-05-15

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