KR960042559A - Dual Focus Optical Pickup in Digital Video Disc Player - Google Patents
Dual Focus Optical Pickup in Digital Video Disc Player Download PDFInfo
- 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
Links
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- Optical Recording Or Reproduction (AREA)
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
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)
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 |
JP8138296A JPH0922540A (en) | 1995-05-31 | 1996-05-31 | Optical pickup device |
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 |
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 |
Family
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)
Country | Link |
---|---|
KR (1) | KR960042559A (en) |
-
1995
- 1995-05-31 KR KR1019950014150A patent/KR960042559A/en not_active Application Discontinuation
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Legal Events
Date | Code | Title | Description |
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |