KR980004515A - Objective lens for optical pickup - Google Patents

Objective lens for optical pickup Download PDF

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Publication number
KR980004515A
KR980004515A KR1019960022771A KR19960022771A KR980004515A KR 980004515 A KR980004515 A KR 980004515A KR 1019960022771 A KR1019960022771 A KR 1019960022771A KR 19960022771 A KR19960022771 A KR 19960022771A KR 980004515 A KR980004515 A KR 980004515A
Authority
KR
South Korea
Prior art keywords
objective lens
optical pickup
inclined surface
refractive index
region
Prior art date
Application number
KR1019960022771A
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Korean (ko)
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KR100193597B1 (en
Inventor
최학림
Original Assignee
이형도
삼성전기 주식회사
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Publication date
Application filed by 이형도, 삼성전기 주식회사 filed Critical 이형도
Priority to KR1019960022771A priority Critical patent/KR100193597B1/en
Publication of KR980004515A publication Critical patent/KR980004515A/en
Application granted granted Critical
Publication of KR100193597B1 publication Critical patent/KR100193597B1/en

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Abstract

본 발명은 컴팩트 디스크와 디지털 비데오 디스크에 동시에 사용하기 위한 광 픽업장치용 대물렌즈에 대한 것으로 발명의 주된 목적은 굴절율 분포 렌즈를 사용하여 광 픽업장치의 대물렌즈를 제작하되, 외주연 일부를 경사지게 가공하는 단순한 가공만으로 두 개의 초점을 가질 수 있도록 하여 제작이 쉽고 가격이 저렴한 광 픽업장치용 대물렌즈를 제공하는데 목적이 있다.The present invention relates to an objective lens for an optical pickup device for simultaneous use in compact discs and digital video discs. The main object of the present invention is to manufacture an objective lens of an optical pickup device using a refractive index distribution lens, and to process a part of the outer periphery inclinedly. It is an object of the present invention to provide an objective lens for an optical pickup device that is easy to manufacture and inexpensive by allowing two focuses to be performed by simple processing.

이를 위한 주요 구성은 중앙의 밀도가 높고 주변으로 갈수록 밀도가 낮은 굴절율 분포렌즈를 가공하되, 상기한 굴절율 분포렌즈의 어느 일측면은 평면형으로 가공하고, 그 타측면은 중앙을 제외한 가장자리 부분에 경사면을 가공하여, 중앙의 평면에 의해 초점거리가 먼 제1영역과, 가장자리의 경사면에 의해 촛점거리가 가까운 제2영역으로 구분되도록 하는데 있다.The main configuration is to process a refractive index distribution lens having a high density in the center and a low density toward the periphery, but one side of the refractive index distribution lens is processed into a planar shape, and the other side has an inclined surface at the edge portion except the center. The processing is performed so that the first area far from the focal length by the central plane and the second area close to the focal length by the inclined surface of the edge are provided.

Description

광 픽업용 대물렌즈Objective lens for optical pickup

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

제2도는 본 발명의 대물렌즈를 보인 구성도이다.2 is a block diagram showing the objective lens of the present invention.

Claims (3)

중앙의 밀도가 높고 주변으로 갈수록 밀도가 낮은 굴절율 분포렌즈를 가공하되, 상기한 굴절율 분포렌즈의 어느 일측면은 평면형으로 가공하고, 그 타측면은 중앙을 제외한 가장자리 부분에 경사면을 가공하여, 중앙의 평면에 의해 초점거리가 먼 제1영역과, 가장자리의 경사면에 의해 촛점거리가 가까운 제2영역으로 구분하도록함을 특징으로 하는 광 픽업용 대물렌즈.The refractive index distribution lens is processed with a high density at the center and the density is lower toward the periphery, but one side of the refractive index distribution lens is processed into a planar shape, and the other side is processed with an inclined surface at the edge portion except the center, An objective lens for optical pickup, characterized in that it is divided into a first region far from the focal length by a plane and a second region close to the focal length by an inclined surface of the edge. 제1항에 있어서, 상기한 경사면을 입사면에 형성하여 촛점거리가 먼 제1영역과, 초점거리가 가까운 제2영역이 구분되도록 함을 특징으로 하는 광 픽업용 대물렌즈.The objective lens of claim 1, wherein the inclined surface is formed on the incidence surface to distinguish the first region having a far focus distance from the second region having a close focal length. 제1항에 있어서, 상기한 경사면을 출사면에 형성하여 촛점거리가 먼 제1영역과, 촛점거리가 가까운 제2영역이 구분되도록 함을 특징으로 하는 광 픽업용 대물렌즈.The objective lens of claim 1, wherein the inclined surface is formed on the emission surface to distinguish the first region having a far focus distance from the second region having a close focus distance. ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019960022771A 1996-06-21 1996-06-21 Objective lens for optical pickup KR100193597B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960022771A KR100193597B1 (en) 1996-06-21 1996-06-21 Objective lens for optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960022771A KR100193597B1 (en) 1996-06-21 1996-06-21 Objective lens for optical pickup

Publications (2)

Publication Number Publication Date
KR980004515A true KR980004515A (en) 1998-03-30
KR100193597B1 KR100193597B1 (en) 1999-06-15

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ID=66288207

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960022771A KR100193597B1 (en) 1996-06-21 1996-06-21 Objective lens for optical pickup

Country Status (1)

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KR (1) KR100193597B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514323B1 (en) * 1997-12-05 2005-12-08 삼성전자주식회사 Optical pickup with objective lens compatible with multiple optical discs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514323B1 (en) * 1997-12-05 2005-12-08 삼성전자주식회사 Optical pickup with objective lens compatible with multiple optical discs

Also Published As

Publication number Publication date
KR100193597B1 (en) 1999-06-15

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