KR960042559A - Dual Focus Optical Pickup in Digital Video Disc Player - Google Patents

Dual Focus Optical Pickup in Digital Video Disc Player Download PDF

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Publication number
KR960042559A
KR960042559A KR1019950014150A KR19950014150A KR960042559A KR 960042559 A KR960042559 A KR 960042559A KR 1019950014150 A KR1019950014150 A KR 1019950014150A KR 19950014150 A KR19950014150 A KR 19950014150A KR 960042559 A KR960042559 A KR 960042559A
Authority
KR
South Korea
Prior art keywords
digital video
dual focus
light
optical pickup
video disc
Prior art date
Application number
KR1019950014150A
Other languages
Korean (ko)
Inventor
최양오
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 KR1019950014150A priority Critical patent/KR960042559A/en
Priority to EP96303808A priority patent/EP0745983A3/en
Priority to CN96110372A priority patent/CN1146595A/en
Priority to US08/656,487 priority patent/US5777971A/en
Priority to JP8138296A priority patent/JPH0922540A/en
Publication of KR960042559A publication Critical patent/KR960042559A/en

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Abstract

본 발명은 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치에 관한 것으로서, 특히 두께가 1,2㎜인 기존의 오디오 디스크와, 두께가 0.6㎜인 디지탈 비디오 디스크에 기록된 정보를 선택적으로 읽어들일 수 있도록 하는 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual focus optical pickup device of a digital video disc player. In particular, the present invention relates to a conventional audio disc having a thickness of 1,2 mm and a digital video disc having a thickness of 0.6 mm. A dual focus optical pickup device of a digital video disc player.

이를 위하여 레이저 다이오드로부터 발생되는 빔을 0차, ±1차 광으로 분리하는 회절격자, 이 분리된 광을 집광하여 디스크상에 포커싱시키는 듀얼 포커스렌즈를 포함하는 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치에 있어서, 상기 회절격자와 듀얼 포커스렌즈 사이에 설치되어 입사광을 일정한 비의 반사광과 투과광으로 분리하는 빔 스플리트, 상기 빔 스플리트의 일측에 형성되어 반사된 디스크상에 기록된 광 정보를 이용하여 포커스 에러를 검출하기 위해 비점수차를 발생시키는 마이크로 프레넬렌즈, 상기 빔 스플리트의 타측에 형성되어 마이크로 프레넬렌즈로부터 발생되는 비점수차의 빔을 전기적 신호로 변환하는 광 검출기를 일체로 형성한 것이다.To this end, a dual focus optical pickup device of a digital video disc player comprising a diffraction grating for splitting a beam generated from a laser diode into 0th order and ± 1st order light, and a dual focus lens for focusing the separated light on a disc A beam split provided between the diffraction grating and the dual focus lens to separate incident light into reflected light and transmitted light at a constant ratio, and using optical information recorded on one side of the beam split and recorded on the reflected disk In order to detect a focus error, a micro Fresnel lens generating astigmatism and an optical detector formed on the other side of the beam split and converting astigmatism beam generated from the micro Fresnel lens into an electrical signal are integrally formed. .

Description

디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치Dual Focus Optical Pickup in Digital Video Disc Player

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

제2도는 본 발명에 따른 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치의 구성도.2 is a block diagram of a dual focus optical pickup apparatus of a digital video disc player according to the present invention.

Claims (1)

레이저 다이오드(51)로부터 발생되는 빔을 0차, ±1차 광으로 분리하는 회절격자(52), 이 분리된 광을 집광하여 디스크(58)(59)상에 포커싱시키는 듀얼 포커스렌즈를 포함하는 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치에 있어서, 상기 회절격자(52)와 듀얼 포커스렌즈(55) 사이에 설치되어 입사광을 일정한 비의 반사광과 투과광으로 분리하는 빔 스플리트(53), 상기 빔 스플리트(53)의 일측에 형성되어 반사된비디오 및 오디오 디스크(58)(59)상에 기록된 광 정보를 이용하여 포커스 에러를 검출하기 위해 비점수차를 발생시키는 마이크로 프레넬렌즈(62), 상기 빔 스플리트(53)의 타측에 형성되어 마이크로 프레넬렌즈(62)로부터 발생되는 비점수차의 빔을 전기적 신호로 변환하는 광 검출기를 일체로 형성한 것을 특징으로 하는 디지탈 비디오 디스크 플레이어의 듀얼 포커스 광 픽업장치.A diffraction grating 52 for splitting a beam generated from the laser diode 51 into 0th order and ± 1st order light, and a dual focus lens for focusing the separated light on the disks 58 and 59; A dual focus optical pickup device of a digital video disc player, comprising: a beam split (53) disposed between the diffraction grating (52) and the dual focus lens (55) for separating incident light into reflected light and transmitted light of a constant ratio, and the beam A micro Fresnel lens 62 formed on one side of the split 53 and generating astigmatism for detecting a focus error using optical information recorded on the reflected video and audio disks 58, 59, A digital video display formed on the other side of the beam split 53 and integrally formed with an optical detector for converting an astigmatism beam generated from the micro Fresnel lens 62 into an electrical signal Dual focus optical pickup in player. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950014150A 1995-05-31 1995-05-31 Dual Focus Optical Pickup in Digital Video Disc Player KR960042559A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019950014150A KR960042559A (en) 1995-05-31 1995-05-31 Dual Focus Optical Pickup in Digital Video Disc Player
EP96303808A EP0745983A3 (en) 1995-05-31 1996-05-29 Optical pickup
CN96110372A CN1146595A (en) 1995-05-31 1996-05-31 Optical head
US08/656,487 US5777971A (en) 1995-05-31 1996-05-31 Optical head with a micro fresnel lens integrated on a beam splitter
JP8138296A JPH0922540A (en) 1995-05-31 1996-05-31 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950014150A KR960042559A (en) 1995-05-31 1995-05-31 Dual Focus Optical Pickup in Digital Video Disc Player

Publications (1)

Publication Number Publication Date
KR960042559A true KR960042559A (en) 1996-12-21

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ID=66525868

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950014150A KR960042559A (en) 1995-05-31 1995-05-31 Dual Focus Optical Pickup in Digital Video Disc Player

Country Status (1)

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KR (1) KR960042559A (en)

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