KR960019127A - Optical pickup device - Google Patents

Optical pickup device Download PDF

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Publication number
KR960019127A
KR960019127A KR1019940029768A KR19940029768A KR960019127A KR 960019127 A KR960019127 A KR 960019127A KR 1019940029768 A KR1019940029768 A KR 1019940029768A KR 19940029768 A KR19940029768 A KR 19940029768A KR 960019127 A KR960019127 A KR 960019127A
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KR
South Korea
Prior art keywords
light
recording medium
optical recording
incident
reflected
Prior art date
Application number
KR1019940029768A
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Korean (ko)
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.)
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Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019940029768A priority Critical patent/KR960019127A/en
Publication of KR960019127A publication Critical patent/KR960019127A/en

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Abstract

본 발명은 단일의 편광부재를 이용하여 여러종류의 파장의 빔이 선택적으로 발광되는 경우 그 편광부재를 통해 정보기록매체 또는 수광소자로의 지향이 가능하도록 함으로써 효율적인 정보독출이 이루어지도록 된 광픽업장치를 제공하기 위한 것이다.According to the present invention, when a beam of various wavelengths is selectively emitted by using a single polarizing member, an optical pickup apparatus enables efficient information reading by enabling directing to an information recording medium or a light receiving element through the polarizing member. It is to provide.

이를 위해 본 발명은, 서로 다른 파장의 레이저빔을 발생시키는 제1 및 제2레이저광원(36A,36B)과, 상기 레이저광원(36A,36B)으로부터의 레이저빔을 3빔으로 각각 분할하는 제1 및 제2회절격자(38A,38B), 상기 회절격자(38A,38B)를 통한 3분할빔을 각각 평행광으로 변환시키는 제1 및 제2콜리메이트렌즈(40A,40B), 상기 제1 또는 제2콜리메이트렌즈(40A;40B)를 통한 평행광이 광기록매체(10)로 지향되도록 함과 더불어 상기 광기록매체(10)에서의 반사광을 데이터독출용인 수광소자(56)로 입사되도록 하는 편광부재(41), 상기 편광부재(41)를 통해 직각프리즘(45)에서 소정각도 편향된 입사광이 상기 광기록매체(10)로 투사되도록 함과 더불어 상기 광기록매체(10)에서의 반사광이 상기 직각프리즘(45)으로 투사되도록 하는 대물렌즈(46) 및, 상기 대물렌즈(46) 및 상기 직각프리즘(45)을 통해 상기 편광부재(41)로 입사되는 상기 광기록매체(10)에서의 반사광을 집속하여 상기 수광소자(56)로 입사시키는 집속렌즈(52)로 이루어진 광픽업장치에서, 상기 편광부재(41)는 상기 제1회절격자(38A) 및 상기 제1콜리메이트렌즈(40A)를 통한 상기 제1레이저광원(36A)으로부터의 입사광을 소정각도 전반사시키는 전반사면(41a)과, 상기 전반사된 입사광에 대해 직진성을 보장함과 더불어 상기 제2회절격자(38B) 및 상기 제2콜리메이트렌즈(40B)를 통한 상기 제2레이저광원(36B)으로부터의 입사광을 소정각도 편향시키는 편광면(41b) 및, 상기 편광면(41b)을 통해 직진 또는 편향된 입사광을 상기 직각프리즘(45)쪽으로 지향시키는 한편 상기 대물렌즈(46) 및 상기 직각프리즘(45)을 매개로 한 상기 광기록매체(10)에서의 반사광을 상기 집속렌즈(52)쪽으로 투사시키는 빔분리면(41c)이 일체로 형성된 롬보이드 프리즘으로 구성된 것이다.To this end, the present invention, the first and second laser light source (36A, 36B) for generating laser beams of different wavelengths, and the first to divide the laser beam from the laser light source (36A, 36B) into three beams, respectively. And first and second collimated lenses 40A and 40B for converting the third split beams through the second diffraction gratings 38A and 38B and the diffraction gratings 38A and 38B into parallel light, respectively. Polarization for directing parallel light through two collimating lenses 40A and 40B to the optical recording medium 10 and for allowing the reflected light from the optical recording medium 10 to be incident on the light receiving element 56 for data reading. The incident light deflected by a predetermined angle in the rectangular prism 45 through the member 41 and the polarizing member 41 is projected onto the optical recording medium 10, and the reflected light from the optical recording medium 10 is reflected by the perpendicular angle. An objective lens 46 for projecting onto a prism 45 and the objective lens 46 and the right-angle prism 45 In the optical pickup device consisting of a focusing lens 52 for focusing the reflected light from the optical recording medium 10 incident to the polarizing member 41 through the light receiving element 56, the polarizing member 41 The total reflection surface 41a which totally reflects the incident light from the first laser light source 36A through the first diffraction grating 38A and the first collimated lens 40A at a predetermined angle and with respect to the totally reflected incident light A polarization plane 41b which assures straightness and deflects incident light from the second laser light source 36B through the second diffraction grating 38B and the second collimated lens 40B at a predetermined angle; and While directing or deflecting incident light through the polarization plane 41b toward the rectangular prism 45, the reflected light from the optical recording medium 10 via the objective lens 46 and the rectangular prism 45 is reflected. A beam projecting toward the focusing lens 52 The separating surface 41c is composed of a romvoid prism 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.

제2도는 본 발명의 일실시예에 따른 광픽업장치의 전체구성도이다.2 is an overall configuration diagram of an optical pickup apparatus according to an embodiment of the present invention.

Claims (2)

서로 다른 파장의 레이저빔을 발생시키는 제1 및 제2레이저광원(36A,36B)과, 상기 레이저광원(36A,36B)으로부터의 레이저빔을 3빔으로 각각 분할하는 제1 및 제2회절격자(38A,38B), 상기 회절격자(38A,38B)를 통한 3분할빔을 각각 평행광으로 변환시키는 제1 및 제2콜리메이트렌즈(40A,40B), 상기 제1 또는 제2콜리메이트렌즈(40A;40B)를 통한 평행광이 광기록매체(10)로 지향되도록 함과 더불어 상기 광기록매체(10)에서의 반사광을 데이터독출용인 수광소자(56)로 입사되도록 하는 편광부재(41), 상기 편광부재(41)를 통해 직각프리즘(45)에서 소정각도 편향된 입사광이 상기 광기록매체(10)로 투사되도록 함과 더불어 상기 광기록매체(10)에서의 반사광이 상기 직각프리즘(45)으로 투사되도록 하는 대물렌즈(46) 및, 상기 대물렌즈(46) 및 상기 직각프리즘(45)을 통해 상기 편광부재(41)로 입사되는 상기 광기록매체(10)에서의 반사광을 집속하여 상기 수광소자(56)로 입사시키는 집속렌즈(52)로 이루어진 광픽업장치에 있어서, 상기 편광부재(41)는 상기 제1회절격자(38A) 및 상기 제1콜리메이트렌즈(40A)를 통한 상기 제1레이저광원(36A)으로부터의 입사광을 소정각도 전반사시키는 전반사면(41a)과, 상기 전반사된 입사광에 대해 직진성을 보장함과 더불어 상기 제2회절격자(38B) 및 상기 제2콜리메이트렌즈(40B)를 통한 상기 제2레이저광원(36B)으로부터의 입사광을 소정각도 편향시키는편광면(41b) 및, 상기 편광면(41b)을 통해 직진 또는 편향된 입사광을 상기 직각프리즘(45)쪽으로 지향시키는 한편 상기 대물렌즈(46) 및 상기 직각프리즘(45)을 매개로 한 상기 광기록매체(10)에서의 반사광을 상기 집속렌즈(52)쪽으로 투사시키는 빔분리면(41c)이 일체로 형성된 롬보이드 프리즘으로 구성된 것을 특징으로 하는 광픽업장치.First and second laser light sources 36A and 36B for generating laser beams having different wavelengths, and first and second diffraction gratings for dividing the laser beams from the laser light sources 36A and 36B into three beams, respectively. 38A, 38B), first and second collimated lenses 40A and 40B for converting three split beams through the diffraction gratings 38A and 38B into parallel light, respectively, and the first or second collimated lenses 40A. A polarizing member 41 for directing parallel light through 40B to the optical recording medium 10 and for allowing the reflected light from the optical recording medium 10 to be incident on the light receiving element 56 for reading data; The incident light deflected by a predetermined angle from the rectangular prism 45 through the polarizing member 41 is projected onto the optical recording medium 10, and the reflected light from the optical recording medium 10 is projected onto the rectangular prism 45. The polarizing member through the objective lens 46 and the objective lens 46 and the right angle prism 45 An optical pickup apparatus comprising a focusing lens 52 for focusing reflected light from the optical recording medium 10 incident on the optical recording medium 10 and entering the light receiving element 56, wherein the polarizing member 41 is formed of the first lens. The total reflection surface 41a which totally reflects the incident light from the first laser light source 36A through the single grating 38A and the first collimated lens 40A at a predetermined angle, and guarantees straightness to the totally reflected incident light. In addition, the polarization surface 41b for deflecting the incident light from the second laser light source 36B through the second diffraction grating 38B and the second collimator lens 40B at a predetermined angle, and the polarization plane ( 41b) directs the incident or deflected incident light toward the rectangular prism 45, and reflects the reflected light from the optical recording medium 10 via the objective lens 46 and the rectangular prism 45. The beam splitting surface 41c projecting toward 52 is one The optical pickup device according to claim consisting of a prism formed of a ROM voids. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940029768A 1994-11-14 1994-11-14 Optical pickup device KR960019127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940029768A KR960019127A (en) 1994-11-14 1994-11-14 Optical pickup device

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Application Number Priority Date Filing Date Title
KR1019940029768A KR960019127A (en) 1994-11-14 1994-11-14 Optical pickup device

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KR960019127A true KR960019127A (en) 1996-06-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100260705B1 (en) * 1997-08-29 2000-07-01 윤종용 Optical pickup compatible with optical recording media

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100260705B1 (en) * 1997-08-29 2000-07-01 윤종용 Optical pickup compatible with optical recording media

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