KR980004441A

KR980004441A - Optical pickup device

Info

Publication number: KR980004441A
Application number: KR1019960021233A
Authority: KR
Inventors: 김남규
Original assignee: 구자홍; Lg 전자주식회사
Priority date: 1996-06-13
Filing date: 1996-06-13
Publication date: 1998-03-30

Abstract

본 발명은 서로 다른 기록 밀도 및 두께를 갖는 광디스크를 독취 가능하도록 한 광픽업장치에 관한것으로, 프리즘 일체형 대물렌즈를 적용한 박형의 CD/DVD 겸용 광픽업장치를 제공하기 위하여 레이저 다이오드(20)로부터 레이저 빔을 입사받는 제1 비구면(31)과, 상기 제1 비구면(31)에서 수렴되는 광을 반사시키는 제1 반사면(32)과, 상기 제1 반사면(32)에서 반사되는 광을 제1,2광으로 분리하는 광분리면(33)과, 상기 광분리면(33)에서 분리된 광중에서 반사되는 제1광을 다시 반사시키는 제2 반사면(34)에서 반사되는 광을 DVD용 디스크(D₆)로 집광시키는 제2 비구면(35)과, 상기 광분리면(33)에서 분리된 광중에서 투과되는 제2광을 CD용 디스크(D₁₂)로 집광시키는 제3 비구면(36)으로 구성되는 프리즈믹 렌즈(30)를 적용시킨 것이다.The present invention relates to an optical pickup apparatus capable of reading optical discs having different recording densities and thicknesses. The present invention relates to a thin CD / DVD combined optical pickup apparatus employing a prism-integrated objective lens. A first aspherical surface 31 receiving a beam, a first reflecting surface 32 reflecting light converged from the first aspherical surface 31, and light reflected from the first reflecting surface 32; The light reflected from the optical separation surface 33 for dividing into two light and the second reflection surface 34 for reflecting the first light reflected from the light separated from the optical separation surface 33 again, the DVD disc D ₆ ) a freeze composed of a second aspherical surface 35 for condensing the light and a third aspherical surface 36 for condensing the second light transmitted from the light separated from the optical separation surface 33 with the CD disk D ₁₂ . The MIC lens 30 is applied.

Description

Optical pickup device

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

제5도는 본 발명에 의한 프리즈믹 렌즈의 구성도.5 is a block diagram of a prismic lens according to the present invention.

제6도는 본 발명에 의한 광픽업장치의 일실시례를 보인 구성도.6 is a block diagram showing an embodiment of the optical pickup device according to the present invention.

제7도는 본 발명에 의한 광픽업장치의 다른 실시례에 의한 구성도.7 is a configuration diagram according to another embodiment of the optical pickup apparatus according to the present invention.

Claims

An optical pickup apparatus comprising: a light source, a prism lens performing a function of a prism, a mirror, and an objective lens so as to be used for an optical disk having a different recording density and thickness, and a photodetector for sensing a signal from the disk.

The optical pickup apparatus of claim 1, wherein the photodetector is integrally formed on the output side of the prismic lens.

The optical lens of claim 1 or 2, wherein the prismic lens has a first aspherical surface that receives a beam from a light source, a first reflective surface that reflects light converged from the first aspherical surface, and a reflection at the first reflective surface. An optical separation surface for separating the light into first and second lights, a second reflection surface for reflecting light reflected back from the light separated from the optical separation surface, and light reflected from the second reflection surface to a DVD disc And a third aspherical surface for condensing the light transmitted from the light separated by the optical separation surface with a CD disk.

A light source, a prism for performing a function of a prism, a mirror, and an objective lens for condensing the beam from the light source to optical disks having different recording densities and thicknesses, and a photodetector for detecting the reflected light from the disk, are provided on the actuator. Optical pickup device, characterized in that formed integrally.

※ Note: The disclosure is based on the initial application.