KR980004434A - CD / DVD optical pickup - Google Patents

CD / DVD optical pickup Download PDF

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Publication number
KR980004434A
KR980004434A KR1019960020977A KR19960020977A KR980004434A KR 980004434 A KR980004434 A KR 980004434A KR 1019960020977 A KR1019960020977 A KR 1019960020977A KR 19960020977 A KR19960020977 A KR 19960020977A KR 980004434 A KR980004434 A KR 980004434A
Authority
KR
South Korea
Prior art keywords
polarizing plate
optical pickup
optical
distance difference
correction means
Prior art date
Application number
KR1019960020977A
Other languages
Korean (ko)
Inventor
김대영
Original Assignee
구자홍
Lg 전자주식회사
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 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019960020977A priority Critical patent/KR980004434A/en
Publication of KR980004434A publication Critical patent/KR980004434A/en

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Abstract

본 발명은 CD와DVD 겸용 광픽업 장치에 있어서, 편광판이 지니고 있는 광학적 거리차에 의해 발생된 수차를 제거하여 신호재생 특성을 향상시키기 위한 CD/DVD겸용 광픽업 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD / DVD combined optical pickup apparatus for improving signal reproduction characteristics by removing aberration caused by the optical distance difference of a polarizing plate.

본 발명에 CD/DVD겸용 광픽업 장치에 있어서 편광방향에 따라 입사되는 빔의 일부를 차폐시키거나 통과시키는 편광판의 광학적 거리차이에 의하여 나타나는 수차의 제거를 위한 구성으로 편광판의 광학적 거리차이를 보이는 영역의 빔이 통과하는 광학소자의 해당영역에 역수차를 발생시키는 수차보정수단을 형성한 구성으로서, 이때 수차보정수단이 형성되는 광학소자로는 대물렌즈, 빔분리 프리즘 및 편광판 등을 들 수 있다.In the optical pickup device for a combined CD / DVD according to the present invention, a region for showing an optical distance difference of the polarizing plate with a configuration for eliminating aberration caused by the optical distance difference of the polarizing plate which shields or passes a part of the beam incident along the polarization direction. An aberration correction means is formed in the corresponding region of the optical element through which the beam passes. The optical element in which the aberration correction means is formed may include an objective lens, a beam separation prism, and a polarizing plate.

본 발명은 CD/DVD겸용 재생시 편광판의 광학적 거리차로 인해 발생되는 수차가 수치보정장치에 의해서 제거됨에 따라 노이즈 발생이 방지되어 양호한 재생신호 특성을 나타내는 효과가 있다.According to the present invention, since aberrations generated by the optical distance difference of the polarizing plate during CD / DVD combined playback are eliminated by the numerical correction device, noise is prevented, thereby exhibiting good reproduction signal characteristics.

Description

CD/DVD겸용 광픽업 장치CD / DVD combined pickup device

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

제6도는 제5도의 제조과정을 통해 얻어진 편광판의 광학적 거리차이를 모식적으로 보여주는 단면도.6 is a cross-sectional view schematically showing the optical distance difference of the polarizing plate obtained through the manufacturing process of FIG.

제7a도및 제7b도 내지는 제7c도는 본 발명의 광학소자에 형성되는 수차보정수단에 대한 여러 실시예를 보인 요부구성도.7A and 7B to 7C are main components showing various embodiments of aberration correction means formed in the optical element of the present invention.

Claims (4)

CD/DVD겸용 광픽업 장치에 있어서,편광방향에 따라 입사되는 빔의 일부를 차폐 또는 통과시키는 편광판의 광학적 거리차에 의해 발생되는 수차의 제거를 위해 광학소자의 역수차를 발생시키는 수차보정수단을 형성함을 특징으로 하는 CD/DVD겸용 광픽업 장치.In the optical pickup device for CD / DVD combined use, an aberration correction means for generating reverse aberration of the optical element for removing aberration caused by the optical distance difference of the polarizing plate which shields or passes a part of the incident beam along the polarization direction is provided. CD / DVD combined optical pickup device characterized in that the forming. 제1항에 있어서, 상기 수차보정수단은 대물렌즈에 형성됨을 특징으로 하는 CD/DVD겸용 광픽업 장치.The optical pickup apparatus of claim 1, wherein the aberration correction means is formed in an objective lens. 제1항에 있어서, 상기 수차보정수단은 빔분리 프리즘에 형성됨을 특징으로 하는 CD/DVD겸용 광픽업 장치.The optical pickup apparatus of claim 1, wherein the aberration correction means is formed in a beam separation prism. 제1항에 있어서, 상기 수차보정수단은 편광판의 배면에 형성됨을 특징으로 하는 CD/DVD겸용 광픽업 장치.The optical pickup apparatus of claim 1, wherein the aberration correction means is formed on a rear surface of the polarizing plate. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960020977A 1996-06-12 1996-06-12 CD / DVD optical pickup KR980004434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960020977A KR980004434A (en) 1996-06-12 1996-06-12 CD / DVD optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960020977A KR980004434A (en) 1996-06-12 1996-06-12 CD / DVD optical pickup

Publications (1)

Publication Number Publication Date
KR980004434A true KR980004434A (en) 1998-03-30

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ID=66284218

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960020977A KR980004434A (en) 1996-06-12 1996-06-12 CD / DVD optical pickup

Country Status (1)

Country Link
KR (1) KR980004434A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100324272B1 (en) * 1998-08-04 2002-02-25 구자홍 Optical Pick-up Apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100324272B1 (en) * 1998-08-04 2002-02-25 구자홍 Optical Pick-up Apparatus

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