KR970066628A - Optical system using aspheric lens - Google Patents

Optical system using aspheric lens Download PDF

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Publication number
KR970066628A
KR970066628A KR1019960006506A KR19960006506A KR970066628A KR 970066628 A KR970066628 A KR 970066628A KR 1019960006506 A KR1019960006506 A KR 1019960006506A KR 19960006506 A KR19960006506 A KR 19960006506A KR 970066628 A KR970066628 A KR 970066628A
Authority
KR
South Korea
Prior art keywords
optical system
lens group
lens
light incident
predetermined distance
Prior art date
Application number
KR1019960006506A
Other languages
Korean (ko)
Inventor
황성호
Original Assignee
김광호
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019960006506A priority Critical patent/KR970066628A/en
Priority to CN97103438A priority patent/CN1175766A/en
Publication of KR970066628A publication Critical patent/KR970066628A/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Forging (AREA)

Abstract

본 발명은 수차 보정 능력이 우수하며, 크기가 작고 가벼우며 촬영이 편리한 콤팩트 카메라에 많이 사용되는 비구면 렌즈를 사용한 광학계에 관한 것으로, 마지막 렌즈군의 대물측에 비구면 렌즈를 배치한 가우형 광학계로 구성함으로써, 비점 수차 및 색수차의 보정이 특히 양호하며, 또한 구면 수차, 상면 만곡, 왜곡등의 수차 보정 상태가 좋으며, 그 전장이 짧은 동시에 적은 비용으로 효율 좋은 광학계를 구성하고 있다.The present invention relates to an optical system using an aspherical lens which is widely used in a compact camera which is excellent in aberration correcting ability, small in size, light in weight and easy to photograph, and is composed of a gauge type optical system in which an aspheric lens is arranged on the object side of the last lens group This makes it possible to correct the astigmatism and the chromatic aberration particularly well and to correct the aberration such as spherical aberration, field curvature, and distortion, and to construct an optical system that is short in its total length and is efficient at low cost.

Description

비구면 렌즈를 사용한 광학계Optical system using aspheric lens

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

제6도는 본 발명에 따른 광학계의 렌즈 배치도.FIG. 6 is a lens arrangement view of an optical system according to the present invention; FIG.

Claims (5)

1매의 볼록 렌즈를 갖고 물체로부터 입사되는 빛을 소정의 각도로 수렴하는 제1렌즈군; 2매의 볼록 렌즈와 1매의 오목 렌즈를 가지고, 상기 제1렌즈로부터 소정의 거리 만큼 이격되고, 상기 제1렌즈군으로부터 입사되는 빛을 수렴하는 제2렌즈군; 상기 제2렌즈군으로부터 소정의 거리 만큼 이격되고, 상기 제2렌즈군으로 부터의 빛을 선택적으로 통과시키는 조리개; 1매의 오목 렌즈와 1매의 볼록 렌즈를 가지고, 상기 조리개로부터 소정의 거리 만큼 이격되고, 상기 조리개로부터 입사되는 빛을 발산하는 제3렌즈군; 및 1매의 볼록 렌즈를 가지고, 상기 제3렌즈군으로부터 소정의 거리 만큼 이격되고, 상기 제3렌즈군으로부터 입사되는 빛을 수렴하는 제4렌즈군을 구비하되, 상기 제4렌즈군의 구면들 중 적어도 하나가 비구면인 것을 특징으로 하는 광학계.A first lens group having one convex lens and converging light incident from an object at a predetermined angle; A second lens group having two convex lenses and one concave lens and spaced from the first lens by a predetermined distance and converging light incident from the first lens group; A diaphragm spaced apart from the second lens group by a predetermined distance and selectively passing light from the second lens group; A third lens group having one concave lens and one convex lens and spaced apart from the diaphragm by a predetermined distance and emitting light incident from the diaphragm; And a fourth lens group having one convex lens and spaced apart from the third lens group by a predetermined distance and converging light incident from the third lens group, wherein the spherical surfaces of the fourth lens group Is at least one of an aspherical surface. 제1항에 있어서, 광학계 전체의 초점 거리를 F, 뒤 초점 거리를 B라 할때,The optical system according to claim 1, wherein when the focal length of the entire optical system is F and the back focal length is B, B/F0.5217B / F 0.5217 인 조건을 만족하는 것을 특징으로 하는 광학계.Is satisfied. 제1항에 있어서, 상기 비구면이, 기준 구면의 세그(sag)를 X0, 비구면에 의한 sag를 Xa라 할때,2. The image pickup apparatus according to claim 1, wherein when the aspherical surface is X 0 , the sag of the reference spherical surface is X 0 , and the sag of the aspheric surface is X a , X0-Xa0X 0 -X a 0 인 조건을 만족하는 것을 특징으로 하는 광학계.Is satisfied. 제1항에 있어서, 광학계 첫번째 렌즈면에서 마지막 렌지면까지의 거리를 T, 광학계의 초점 거리를 F라 할때,The optical system according to claim 1, wherein when a distance from the first lens surface of the optical system to the last stage surface is T and a focal length of the optical system is F, T/F0.94T / F 0.94 인 조건을 만족하는 것을 특징으로 하는 광학계.Is satisfied. 제1항 내지 제4항 중 어느 한 항에 있어서, 상비 비구면은 상기 제4렌즈군의 물체쪽 면인 것을 특징으로 하는 광학계.The optical system according to any one of claims 1 to 4, wherein the aspheric aspheric surface is the object side surface of the fourth lens group. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960006506A 1996-03-12 1996-03-12 Optical system using aspheric lens KR970066628A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019960006506A KR970066628A (en) 1996-03-12 1996-03-12 Optical system using aspheric lens
CN97103438A CN1175766A (en) 1996-03-12 1997-03-10 Shaft machining apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960006506A KR970066628A (en) 1996-03-12 1996-03-12 Optical system using aspheric lens

Publications (1)

Publication Number Publication Date
KR970066628A true KR970066628A (en) 1997-10-13

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ID=19452879

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960006506A KR970066628A (en) 1996-03-12 1996-03-12 Optical system using aspheric lens

Country Status (2)

Country Link
KR (1) KR970066628A (en)
CN (1) CN1175766A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325759C (en) * 2005-05-17 2007-07-11 江津增压器厂 Manufacturing method of small sized turbine shaft
US8051694B2 (en) 2007-02-22 2011-11-08 Honda Motor Co., Ltd. Method of and apparatus for manufacturing shaft
JP2014144466A (en) * 2013-01-28 2014-08-14 Honda Motor Co Ltd Shaft manufacturing device

Also Published As

Publication number Publication date
CN1175766A (en) 1998-03-11

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