KR960002185A - Optical pickup device - Google Patents

Optical pickup device Download PDF

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Publication number
KR960002185A
KR960002185A KR1019940015152A KR19940015152A KR960002185A KR 960002185 A KR960002185 A KR 960002185A KR 1019940015152 A KR1019940015152 A KR 1019940015152A KR 19940015152 A KR19940015152 A KR 19940015152A KR 960002185 A KR960002185 A KR 960002185A
Authority
KR
South Korea
Prior art keywords
lens
light
laser beam
reflected
objective lens
Prior art date
Application number
KR1019940015152A
Other languages
Korean (ko)
Other versions
KR0127519B1 (en
Inventor
이근종
Original Assignee
배순훈
대우전자 주식회사
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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019940015152A priority Critical patent/KR0127519B1/en
Publication of KR960002185A publication Critical patent/KR960002185A/en
Application granted granted Critical
Publication of KR0127519B1 publication Critical patent/KR0127519B1/en

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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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • G11B7/1376—Collimator lenses

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

Abstract

본 발명은 재생전용의 광디스크 또는 녹음ㆍ재생이 가능한 광자기디스크에 대해 레이저비임을 조사하고 그 디스크로부터 광을 검출하여 정보를 독취하는 광픽업장치에서 광헤드의 구조를 간단하게 설계하여 높이 및 구성요소가 줄어들도록 구성된 광픽업장치를 제공하기 위한 것이다.The present invention simply designs the height of the optical head in an optical pickup device that irradiates a laser beam to a read-only optical disc or a magneto-optical disc capable of recording and reproducing, and detects light from the disc to read information. An optical pickup device configured to reduce an element is provided.

이를 위해 본 발명은, 레이저비임을 발생하는 레이저광원(30)과, 상기 레이저광원(30)으로부터 방사되는 레이저비임을 3비임으로 분할하는 회절격자(31), 상기 회절격자(31)를 통과한 레이저비임을 평행광으로 변환하는 콜리메이트 렌즈(32a), 상기 콜리메이트 렌즈(32a)에 의해 평행광으로 변환된 레이저비임을 디스크(D)에 집광하는 대물렌즈(36) 및, 상기 디스크(D)의 기록면에서 반사되는 반사광을 수광하는 수광다이오드(37)를 갖춘 광픽업장치에서, 사익 콜리메이트 렌즈(32a)와 상기 대물렌즈(36) 사이에 설치되어 상기 콜리메이트 렌즈(32a)를 통한 상기 레이저광원(30)으로부터의 입사비임을 상기 대물렌즈(36)쪽으로 전반시키는 한편 상기 대물렌즈(36)를 매개로 상기 디스크(D)로부터 반사되는 반사비임을 그대로 통과시키도록 된 비임분리면(41a)과, 상기 비임분리면(41a)을 통과한 상기 반사광을 월라스톤 프리즘(42)과 콜리메이트 렌즈(32b) 및 센서렌즈(43)를 매개로 상기 수광다이오드(37)쪽으로 전반사시키도록 된 전반사면(41b)을 갖춘 반사프리즘(41)이 추가로 구비되어 구성되고, 상기 반사프리즘(41)과 상기 윌라스톤 프리즘(42)은 일체로 형성된 것이다.To this end, the present invention, a laser beam source 30 for generating a laser beam, a diffraction grating 31 for dividing the laser beam radiated from the laser light source 30 into three beams, passing through the diffraction grating 31 A collimated lens 32a for converting the laser beam into parallel light, an objective lens 36 for condensing the laser beam converted into parallel light by the collimated lens 32a, and the disk D In the optical pickup apparatus having a light-receiving diode 37 for receiving the reflected light reflected from the recording surface of the lens), the optical pickup device is provided between the spiral collimator lens 32a and the objective lens 36, and the collimator lens 32a Beam separation surface 41a which propagates the incident beam from the laser light source 30 toward the objective lens 36 while passing the reflected beam reflected from the disk D via the objective lens 36 as it is. And the beam The total reflection surface 41b is configured to totally reflect the reflected light passing through the separation surface 41a toward the light-receiving diode 37 via the wallastone prism 42, the collimating lens 32b, and the sensor lens 43. The reflective prism 41 is further provided and configured, and the reflective prism 41 and the Willaston prism 42 are integrally formed.

Description

광픽업장치Optical pickup device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명의 일실시예에 따른 광픽업장치의 구성을 나타낸 개략도이다.4 is a schematic diagram showing the configuration of an optical pickup apparatus according to an embodiment of the present invention.

Claims (1)

레이저비임을 발생하는 레이저광원(30)과, 상기 레이저광원(30)으로부터 방사되는 레이저비임을 3비임으로 분할하는 회절격자(31), 상기 회절격자(31)를 통과한 레이저비임을 평행광으로 변환하는 콜리메이트 렌즈(32a), 상기 콜리메이트 렌즈(32a)에 의해 평행광으로 변환된 레이저비임을 디스크(D)에 집광하는 대물렌즈(36) 및, 상기 디스크(D)의 기록면에서 반사되는 반사광을 수광하는 수광다이오드(37)를 갖춘 광픽업장치에서, 사익 콜리메이트 렌즈(32a)와 상기 대물렌즈(36) 사이에 설치되어 상기 콜리메이트 렌즈(32a)를 통한 상기 레이저광원(30)으로부터의 입사비임을 상기 대물렌즈(36)쪽으로 전반시키는 한편 상기 대물렌즈(36)를 매개로 상기 디스크(D)로부터 반사되는 반사비임을 그대로 통과시키도록 된 비임분리면(41a)과, 상기 비임분리면(41a)을 통과한 상기 반사광을 월라스톤 프리즘(42)과 콜리메이트 렌즈(32b) 및 센서렌즈(43)를 매개로 상기 수광다이오드(37)쪽으로 전반사시키도록 된 전반사면(41b)을 갖춘 반사프리즘(41)이 추가로 구비되어 구성되고, 상기 반사프리즘(41)과 상기 윌라스톤 프리즘(42)은 일체로 형성된 것을 특징으로 하는 광픽업장치.A laser beam passing through the diffraction grating 31 and a diffraction grating 31 for dividing the laser light source 30 generating a laser beam, the laser beam radiated from the laser light source 30 into three beams as parallel light. The collimating lens 32a to be converted, the objective lens 36 condensing the laser beam converted into parallel light by the collimating lens 32a, and reflected from the recording surface of the disk D. In the optical pickup apparatus having the light-receiving diode 37 for receiving the reflected light, it is provided between the spiral collimator lens 32a and the objective lens 36 from the laser light source 30 through the collimator lens 32a. A beam separation surface 41a and a beam separation surface for propagating the incident beam of light toward the objective lens 36 while passing the reflection beam reflected from the disk D through the objective lens 36 as it is; Having passed (41a) Reflective prism 41 is provided with a total reflection surface 41b which is configured to totally reflect the reflected light toward the light-receiving diode 37 via the wallastone prism 42, the collimating lens 32b and the sensor lens 43. And the reflective prism (41) and the Willaston prism (42) are integrally formed. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940015152A 1994-06-29 1994-06-29 Light pick-up apparatus KR0127519B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940015152A KR0127519B1 (en) 1994-06-29 1994-06-29 Light pick-up apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940015152A KR0127519B1 (en) 1994-06-29 1994-06-29 Light pick-up apparatus

Publications (2)

Publication Number Publication Date
KR960002185A true KR960002185A (en) 1996-01-26
KR0127519B1 KR0127519B1 (en) 1998-04-04

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ID=19386617

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940015152A KR0127519B1 (en) 1994-06-29 1994-06-29 Light pick-up apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100359568B1 (en) * 2001-12-14 2002-11-08 대림스타릿 주식회사 Cleaning method and device of dye transefer niddle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090123376A (en) * 2008-05-28 2009-12-02 서강대학교산학협력단 Optical hydrogen sensor
JP5985661B2 (en) 2012-02-15 2016-09-06 アップル インコーポレイテッド Scan depth engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100359568B1 (en) * 2001-12-14 2002-11-08 대림스타릿 주식회사 Cleaning method and device of dye transefer niddle

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Publication number Publication date
KR0127519B1 (en) 1998-04-04

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