KR970012383A

KR970012383A - Optical pickup device with focus offset function suitable for multiple discs

Info

Publication number: KR970012383A
Application number: KR1019950028491A
Authority: KR
Inventors: 유영복
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1995-08-31
Filing date: 1995-08-31
Publication date: 1997-03-29

Abstract

멀티 디스크에 적합한 포커스 옵셋 기능을 가지는 광픽업장치가 개시되어 있다.An optical pickup apparatus having a focus offset function suitable for a multi-disc is disclosed.

이 개시된 광픽업장치는 광을 생성하는 광원과, 이 광원에서 출사된 광의 경로를 안내하는 광학부재와, 광디스크에서 반사된 신호를 검출하는 광검출기와, 채용되는 다양한 종류의 광디스크에 정보 기록 및/또는 재생시 광디스크의 보호층 두께 변화에 따라 발생되는 포커스 오차 보상할 수 있도록 포커스 오차 보상부재를 구비하며, 포커스 오차 보상부재는 보호층의 두께 차를 보상하는 소정 두께를 갖는 복수개의 커버글래스와, 커버글래스가 고정 설치되고 각각의 커버글래스가 선택적으로 광경로 상에 위치되도록 회전 가능하게 배치된 테이블과, 테이블을 회전 시키는 구동부를 구비하여 광디스크의 기록면에 형성되는 광스폿이 동일 크기가 되도록 된 것을 특징으로 한다.The disclosed optical pickup apparatus includes a light source for generating light, an optical member for guiding a path of light emitted from the light source, a photodetector for detecting a signal reflected from the optical disk, and recording information onto various kinds of optical disks employed. Or a focus error compensating member for compensating for a focus error caused by a change in the thickness of the protective layer of the optical disc during reproduction, wherein the focus error compensating member includes a plurality of cover glasses having a predetermined thickness to compensate for the difference in thickness of the protective layer; The cover glass is fixedly installed, and the cover glass is rotatably disposed so that each cover glass is selectively positioned on the optical path, and the driving part for rotating the table has the same size as the optical spot formed on the recording surface of the optical disc. It features.

Description

Optical pickup device with focus offset function suitable for multiple discs

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

제3도는 본 발명에 따른 멀티 디스크에 적합한 포커스 옵셋 기능을 가지는 광픽업장치의 광학적 배치를 보인 개략적인 구성도3 is a schematic configuration diagram showing an optical arrangement of an optical pickup apparatus having a focus offset function suitable for a multi-disc according to the present invention.

제4도는 본 발명에 따른 포커스 오차 보상부재를 나타낸 평면도4 is a plan view showing a focus error compensation member according to the present invention

Claims

A light source for generating light, an optical member for guiding a path of light emitted from the light source, a photodetector for detecting a signal reflected from the optical disk, and various types of optical disks employed for recording and / or reproducing information on the optical disk. An optical pickup apparatus having a focus offset function suitable for a multi disc having a focus error compensation member capable of compensating for a focus error caused by a change in the thickness of the protective layer, wherein the focus error compensation member is a thickness difference of the protective layer. A plurality of cover glasses having a predetermined thickness to compensate for the problem, a table in which the cover glasses are fixedly installed and the cover glasses are selectively disposed on an optical path, and a driving unit for rotating the table. So that the optical spots formed on the recording surface of the optical disc are the same size. An optical pickup apparatus having a focus offset function suitable for a multi-disc to be gong.

The method of claim 1, wherein a gear is formed on an outer circumferential surface of the table, and the drive unit includes a drive motor and a worm gear rotated by the drive motor and engaged with the outer circumferential surface of the table to rotate the table. An optical pickup apparatus having a focus offset function suitable for a multi disk.

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