KR970050354A

KR970050354A - Optical pickup device dedicated to recording / playback

Info

Publication number: KR970050354A
Application number: KR1019950067452A
Authority: KR
Inventors: 김진태
Original assignee: 이우복; 사단법인 고등기술연구원 연구조합
Priority date: 1995-12-29
Filing date: 1995-12-29
Publication date: 1997-07-29

Abstract

하이 브리드 타입의 기록/재생 가능한 광헤드를 가진 기록/재생 전용의 광 픽업장치를 제공하기 위해 회절격자를 통과한 레이져 다이오드로 부터의 레이져 빔을 상부로 향하게 하는 제1평광면을 가진 모니터링 수광소자와, 상기 모니터링 수광소자의 제1편광면에서 반사된 레이저 빔을 접속하는 대물렌즈와, 상기 대물렌즈를 통과한 빔을 받아 다시 반사되게 하는 디스크와, 상기 디스크에서 반사되어 상기 대물렌즈를 통과한 빔의 일부가 전반사되는 제1,2전반사면과, 상기 제1,2전반사면을 통과한 신호를 반사되게 하는 제2편광면을 통과한 신호를 수신하는 수광소자를 포함하는 기록/재생 전용의 광픽-업장치로 구성됨으로써, 조립 및 조정이 용이하며, 원칩화가 가능하게 되어 대량 생산시 코스트를 절감시킬 수 있다.Monitoring light-receiving element having a first flat surface facing the laser beam upwards from the laser diode passing through the diffraction grating to provide a recording / reproducing optical pickup device having a hybrid recording / reproducing optical head An objective lens for connecting the laser beam reflected from the first polarization plane of the monitoring light receiving element, a disc for receiving the beam passing through the objective lens and being reflected again, and a light reflected from the disc passing through the objective lens Recording / reproduction only comprising a first and second total reflection surface where a part of the beam is totally reflected, and a light receiving element for receiving a signal passing through the second polarization surface for reflecting the signal passing through the first and second reflection surface By the optical pick-up device, it is easy to assemble and adjust, and it is possible to reduce the cost in mass production.

Description

Optical pick-up device for recording and playback

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

제2도는 본 발명의 기록/재생 전용의 광픽-업장치의 광헤드를 나타낸 도면,2 is a view showing an optical head of an optical pickup apparatus for recording / reproducing only according to the present invention;

제3A도 내지 제3C도는 FES(focusing Error Signal)신호에 대한 수광소자의 구성을 각각 설명하기 위한 도면,3A to 3C are views for explaining the configuration of a light receiving element for a focusing error signal (FES) signal, respectively;

Claims

A monitoring light receiving element having a first light plane for directing a laser beam from a laser diode passing through a diffraction grating, an objective lens for connecting a laser beam reflected from the first polarization plane of the monitoring light receiving element, and A disk for receiving the beam passing through the objective lens and reflecting it again, first and second total reflection surfaces through which the part of the beam reflected from the disk and passing through the objective lens is totally reflected, and having passed through the first and second reflection surfaces. An optical pickup apparatus exclusively for recording / reproducing, comprising a light receiving element for receiving a signal passing through a second polarization plane for reflecting a signal.

The recording / reproducing dedicated optical pickup apparatus according to claim 1, wherein the monitoring light receiving element is configured to monitor initial power of a beam from the laser diode to control power of the laser diode.

The recording / reproducing dedicated light according to claim 1, wherein a part (80%) of the beam reflected from the disk is straight, and a part (20%) includes a first polarization surface for entering a laser diode. Pickup device.

2. The light receiving device of claim 1, wherein the light receiving element reflects a first light receiving portion for receiving a portion (S wave) of the reflected wave passing through the second polarization plane and another portion (P wave) of the reflected wave from the third total reflection surface. And a second light receiving portion for receiving light.

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