KR970071556A

KR970071556A - Optical pick-up device

Info

Publication number: KR970071556A
Application number: KR1019960013023A
Authority: KR
Inventors: 최양오
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1996-04-26
Filing date: 1996-04-26
Publication date: 1997-11-07

Abstract

본 발명은 광학 데이타기록 매체에 신호를 기록하고, 그 기록된 정보를 전기신호로 재생시키는 광 픽-업 장치에 관한 것으로서,특히 일반적 음악 재생용 디지탈 오디오 디스크(DAD)와 영상재생용 디지탈 비디오 디스크(DVD)를 동시에 재생할 수있도록 하는 광 픽-업 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an optical pick-up apparatus for recording a signal on an optical data recording medium and for reproducing the recorded information as an electric signal, (DVD) can be played back at the same time.

이를 위하여 대물렌즈 빔스플리트 사이에 레이저빔을 전량 반사하는 전(全) 투과영역과 레이저빔을 일정한 비율로 반사 및 투과하는 반(半) 투과 영역에 혼합 형성되어 스포트 사이즈를 조절할 수 있는 빔 조절판(BAP)을 구비하고, 레이저빔이 상기 빔 조절판을 경유할 경우 직경이 1.6㎛와 0.8㎛의 빔 포커스가 동시에 형성되도록 하여 디지탈 오디오 디스크는 물론, 상기 오디오 디스크 보다 기록 용량이 수배 많아 피트의 폭이 현저히 좁은 디지탈 비디오 디스크의 재생이 가능하도록하여 광 픽-업장치의 신뢰성 향상에 기여할 수 있도록 한 것이다.In order to achieve this, a beam control plate (not shown) which is formed by mixing the entire transmission region reflecting the entire laser beam between the objective lens beam splits and the semi-transmission region reflecting and transmitting the laser beam at a constant ratio BAP). When a laser beam passes through the beam control plate, a beam focus of diameters of 1.6 mu m and 0.8 mu m is formed at the same time, so that the recording capacity is several times larger than that of the digital audio disc, It is possible to reproduce a remarkably narrow digital video disk, contributing to the improvement of the reliability of the optical pick-up apparatus.

Description

Optical pick-up device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명에 따른 광 픽-업장치의 구성도.FIG. 2 is a configuration diagram of an optical pick-up apparatus according to the present invention; FIG.

Claims

The laser beam emitted from the laser diode 51 is reflected by the beam split 53. The reflected beam is converged by the objective lens 54 to form a beam focus on the disk 55 to read the recorded information A total of the laser beam reflected by the beam split 53 and the objective lens 54 is formed by a prism between the beam split 53 and the objective lens 54, A front transmission region 58 for forming a beam focus of 0.8 mu m on the light transmission region 55, a laser beam formed at a central portion of the front transmission region 58 and reflected by the beam split 53 at a predetermined ratio And a semi-light-projecting area 59 for forming a beam focus of 1.6 mu m on the disk 55 by irradiating the transmitted beam with the objective lens 54, Up device.

※ Note: It is disclosed by the contents of the first application.