KR950022275A - Optical pickup device of magneto-optical disc playback system - Google Patents

Optical pickup device of magneto-optical disc playback system Download PDF

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Publication number
KR950022275A
KR950022275A KR1019930027418A KR930027418A KR950022275A KR 950022275 A KR950022275 A KR 950022275A KR 1019930027418 A KR1019930027418 A KR 1019930027418A KR 930027418 A KR930027418 A KR 930027418A KR 950022275 A KR950022275 A KR 950022275A
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KR
South Korea
Prior art keywords
magneto
beam splitter
optical
reflected
optical pickup
Prior art date
Application number
KR1019930027418A
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Korean (ko)
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KR960007901B1 (en
Inventor
김진태
Original Assignee
배순훈
대우전자 주식회사
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Priority to KR1019930027418A priority Critical patent/KR960007901B1/en
Publication of KR950022275A publication Critical patent/KR950022275A/en
Application granted granted Critical
Publication of KR960007901B1 publication Critical patent/KR960007901B1/en

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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1395Beam splitters or combiners
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1362Mirrors

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

Abstract

본 발명은 광자기디스크재생장치의 광픽업장치에 관한 것으로, 자기적 성질에 의해 정보가 기록된 광자기 디스크(20)의 표면에 조사되는 레이저비임을 발생하는 레이저광원(22)과, 이 레이저광원(22)에서 발생되는 레이저비임을 대물렌즈(30)를 통해 상기 광자기 디스크(20)상에 조사되도록 반사하는 제1비임스플리티(26), 상기 광자기 디스크(20)에서 반사되어 상기 제1비임스플리터(26)를 통과하는 반사광을 재차 상기 제1비임스플리터(26)측으로 반사시키는 반사면(34)을 갖춘 각형프리즘(32), 상기 제1비인플리터(26)로부터 반사되는 반사광의 일부성분을 수광소자(36)측으로 반사시키는 제2비임스플리터(38), 상기 제2비임스플리터(38)를 통과한 반사광의 잔여 성분을 상기 수광소자(36)측으로 반사시키는 반사코팅미러(40)를 갖추어 구성되고, 상기 반사미러(34)와 상기 수광소자(36)는 상기 각형 프리즘(32)의 저면에 형성되도록 하여 간단한 광학계를 실현하여 박형의 광픽업장치를 제공하는 것이다.The present invention relates to an optical pickup apparatus of a magneto-optical disk reproducing apparatus, comprising: a laser light source (22) for generating a laser beam irradiated onto a surface of a magneto-optical disk (20) on which information is recorded by magnetic properties; The first beam split 26 reflects the laser beam generated by the light source 22 to be irradiated onto the magneto-optical disk 20 through the objective lens 30, and is reflected by the magneto-optical disk 20. Square prism 32 having a reflecting surface 34 for reflecting the reflected light passing through the first beam splitter 26 back to the first beam splitter 26, and the reflected light reflected from the first non-split 26. The second beam splitter 38 reflects some components of the light beam toward the light receiving element 36, and the reflection coating mirror 40 reflects the remaining components of the reflected light passing through the second beam splitter 38 to the light receiving element 36. ) Is configured with a reflection mirror (34) The light receiving element 36 is formed on the bottom surface of the prismatic prism 32 to realize a simple optical system to provide a thin optical pickup device.

Description

광자기디스크재생시스템의 광픽업장치Optical pickup device of magneto-optical disc playback system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 광자기디스크재생시스템의 광픽업장치의 구성을 설명하는 도면이다.2 is a view for explaining the configuration of an optical pickup apparatus of the magneto-optical disc playback system according to the present invention.

Claims (3)

자기적 성질과 광학적 성질을 이용하여 자기헤드에 의해 기록된 광자기 디스크(20)상의 정보를 재생하는 광픽업장치를 갖춘 광자기디스크재생시스템에 있어서, 상기 광픽업장치는 상기 광자기 디스크(20)의 표면에 조사되는 레이저비임을 발생하는 레이저광원(22)과, 이 레이저광원(22)에서 발생되는 레이저비임을 대물렌즈(30)를 통해 상기 광자기 디스크(20)상에 조사되도록 반사하는 제1비임스플리터(26), 상기 광자기 디스크(20)에서 반사되어 상기 제1비임스플리터(26)를 통과하는 반사광을 재차 상기 제1비임스플리터(26)측으로 반사시키는 반사면(34)을 갖춘 각형 프리즘(32), 상기 제1비임스플리터(26)로부터 반사되는 반사광의 일부 성분을 수광소자(36)측으로 반사시키는 제2비임스플리터(38)측으로 반사시키는 반사코팅미러(40)를 갖추어 구성된 것을 특징으로 하는 광자기디스크재생시스템의 광픽업장치.In a magneto-optical disc reproducing system having an optical pickup device for reproducing information on the magneto-optical disc 20 recorded by the magnetic head using magnetic properties and optical properties, the optical pickup device further comprises the magneto-optical disc 20 Reflecting the laser beam 22 generated by the laser beam irradiated onto the surface of the laser beam and the laser beam generated by the laser beam 22 to be irradiated onto the magneto-optical disk 20 through the objective lens 30. A first beam splitter 26 and a reflecting surface 34 reflecting the reflected light reflected from the magneto-optical disk 20 and passing through the first beam splitter 26 are reflected back to the first beam splitter 26. And a reflective coating mirror 40 for reflecting a part of the reflected light reflected from the first prism splitter 26 and the second beam splitter 38 toward the light receiving element 36. Characteristic A magneto-optical disk reproducing system of the optical pickup device to a. 제1항에 있어서, 상기 제1비임스플리터(26)의 반사막은(28)은 PBS(Polarize Beam Splitter)코팅막으로 구성되고, 상기 제2비임스플리터(38)도 PBS코팅막으로 구성된 것을 특징으로 하는 광자기디스크재생시스템의 광픽업장치.2. The light of claim 1, wherein the reflective film 28 of the first beam splitter 26 is made of a PBS (Polarize Beam Splitter) coating film, and the second beam splitter 38 is made of a PBS coating film. Optical pickup apparatus of a magnetic disc playback system. 제1항에 있어서, 상기 반사미러(34)와 상기 수광소자(36)는 상기 각형 프리즘(32)의 저면에 인접하여 형성된 것을 특징으로 하는 광자기디스크재생시스템의 광픽업장치.The optical pickup apparatus of claim 1, wherein the reflective mirror (34) and the light receiving element (36) are formed adjacent to a bottom surface of the prismatic prism (32). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930027418A 1993-12-13 1993-12-13 Optical pick-up apparatus of optical-magnetic disk system KR960007901B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930027418A KR960007901B1 (en) 1993-12-13 1993-12-13 Optical pick-up apparatus of optical-magnetic disk system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930027418A KR960007901B1 (en) 1993-12-13 1993-12-13 Optical pick-up apparatus of optical-magnetic disk system

Publications (2)

Publication Number Publication Date
KR950022275A true KR950022275A (en) 1995-07-28
KR960007901B1 KR960007901B1 (en) 1996-06-15

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Cited By (1)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101236975B1 (en) * 2006-05-04 2013-02-22 삼성전자주식회사 A washing machine

Cited By (1)

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

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KR960007901B1 (en) 1996-06-15

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