KR950027424A - Zoom lens - Google Patents

Zoom lens Download PDF

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Publication number
KR950027424A
KR950027424A KR1019940004366A KR19940004366A KR950027424A KR 950027424 A KR950027424 A KR 950027424A KR 1019940004366 A KR1019940004366 A KR 1019940004366A KR 19940004366 A KR19940004366 A KR 19940004366A KR 950027424 A KR950027424 A KR 950027424A
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KR
South Korea
Prior art keywords
lens
lens group
positive
refractive power
negative
Prior art date
Application number
KR1019940004366A
Other languages
Korean (ko)
Other versions
KR100257327B1 (en
Inventor
김후식
Original Assignee
이대원
삼성항공산업 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.)
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Application filed by 이대원, 삼성항공산업 주식회사 filed Critical 이대원
Priority to KR1019940004366A priority Critical patent/KR100257327B1/en
Publication of KR950027424A publication Critical patent/KR950027424A/en
Application granted granted Critical
Publication of KR100257327B1 publication Critical patent/KR100257327B1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
    • G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
    • G02B15/144113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++
    • 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
    • G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B2003/0093—Simple or compound lenses characterised by the shape

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

Abstract

3판식 비디오 카메라 등에 이용되는 줌비가4배 이상의 고배율을 가지며, 색분해 광학계의 삽입이 가능한 긴 후초점거리를 갖으며, 고해상도 및 고성능을 보전함과 아울러 제작비를 절감하여 저렴한 렌즈를 널리 공급할 수 있는 줌 렌즈를 제공하는 데 그 목적이 있다.The zoom ratio used in three-panel video cameras has a high magnification of 4 times or more, the long focal length for insertion of color separation optical system, the high resolution and high performance, as well as the reduction of manufacturing cost, which makes it possible to supply cheap lenses widely. The purpose is to provide a lens.

이에 따라 물체측에서 상면 방향의 순으로 정(正)의 굴절력을 갖고, 결상작용이 있는 상면에 대해 고정 설치된 제1렌즈군과 ; 부(負)의 굴절력을 갖고 광축상을 이동함으로써 변배작용을 하는 제2렌즈군과 ; 정(正)의 굴절력을 갖고, 상면에 대해 고정 설치된 제3렌즈군과 ; 정(正)의 굴절력을 갖고 광축 방향으로 움직이면서 포커스 조정을 하는 제4렌즈군으로 이루어져 있으며, 상기한 제1렌즈군은 물체측에서의 순에서 부 렌즈와 정 렌즈 및 메니스커스 렌즈로 이루어지며, 상기 제2렌즈군은 2매의 부 렌즈와 1매의 정 렌즈로 구성되며, 제3렌즈군은 1매의 정 렌즈로 이루어짐과 아울러 제4렌즈군은 1매의 비구면 렌즈를 포함하며, 2배의 정 렌즈와 1매의 부 렌즈로 구성되며, 다음의 조건을 만족함을 특징으로 한다.Thereby, the first lens group having a positive refractive power in the order of the image surface direction on the object side, and is fixed to the image surface having an image forming action; A second lens group having a negative refractive power and shifting by moving the optical axis; A third lens group having positive refractive power and fixed to an image surface; It consists of a fourth lens group having a positive refractive power and the focus adjustment while moving in the direction of the optical axis, the first lens group comprises a negative lens, a positive lens and a meniscus lens in the order from the object side, The second lens group is composed of two negative lenses and one positive lens, the third lens group is composed of one positive lens, and the fourth lens group includes one aspherical lens and is doubled. It consists of a positive lens and one sub-lens and is characterized by satisfying the following conditions.

3.0 <f1/fw <7.0, 0.6 < /f2//fw <1.5, 2.0 < f3/fw <7.0, 2.0 <f4/fw <5.0, 0.02 <d12/f4 <1.0, 0.3 <r11/f3 <1.5, 0.3 </r13//f4 <1.33.0 <f1 / fw <7.0, 0.6 </ f2 // fw <1.5, 2.0 <f3 / fw <7.0, 2.0 <f4 / fw <5.0, 0.02 <d12 / f4 <1.0, 0.3 <r11 / f3 <1.5, 0.3 </ r13 // f4 <1.3

여기서, fw ;광각단에 의한 초점거리, f1,f2,f3,f4 ;각 렌즈군의 초점거리, d12 ; 제3렌즈군과 제4렌즈군의는공기 간격, r11 ; 제3렌즈군을 구성하는 정 렌즈의 물체측 곡율반경, r13 ; 제4렌즈군을 구성하는 부렌즈의 물체측 곡율반경이다.Where fw; focal length by wide-angle end, f1, f2, f3, f4; focal length of each lens group, d12; The air gap between the third lens group and the fourth lens group is r11; The object-side curvature radius of the positive lens constituting the third lens group, r13; The radius of curvature of the object side of the negative lens constituting the fourth lens group.

Description

줌 렌즈Zoom lens

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

제1도는 본 발명의 실시예에 의한 줌 렌즈의 구성도.1 is a block diagram of a zoom lens according to an embodiment of the present invention.

Claims (4)

물체측에서 상면 방향의 순으로 정(正)의 굴절력을 갖고, 결상작용이 있는 상면에 대해 고정 설치된 제1렌즈군과 ; 부(負)의 굴절력을 갖고 광축상을 이동함으로써 변배작용을 하는 제2렌즈군과 ; 정(正)의 굴절력을 갖고, 상면에 대해 고정 설치된 제3렌즈군과 ; 정(正)의 굴절력을 갖고 광축 방향으로 움직이면서 포커스 조정을 하는 제4렌즈군으로 이루어져 있으며, 상기한 제1렌즈군은 물체측에서의 순에서 부 렌즈와 정 렌즈 및 메니스커스렌즈로 이루어지며, 상기 제2렌즈군은 매의 부 렌즈와 1매의 정 렌즈로 구성되며, 제3렌즈군은 1매의 정 렌즈로 이루어짐과 아울러 제4렌즈군은 1매의 비구면 렌즈를 포함하며, 2매의 정 렌즈와 1매의 부 렌즈로 구성된 것을 특징으로 하는 줌 렌즈.A first lens group having positive refractive power in the order of the image plane direction on the object side and fixedly fixed to the image plane having an imaging action; A second lens group having a negative refractive power and shifting by moving the optical axis; A third lens group having positive refractive power and fixed to an image surface; And a fourth lens group having a positive refractive power and focusing while moving in an optical axis direction. The first lens group includes a negative lens, a positive lens, and a meniscus lens in order from an object side. The second lens group is composed of one negative lens and one positive lens, and the third lens group is composed of one positive lens, and the fourth lens group includes one aspherical lens, A zoom lens comprising a positive lens and one secondary lens. 제1항에 있어서, 제3렌즈군은 물체측에 볼록한 면을 갖는 구면 렌즈로 이루어짐을 특징으로 하는 줌 렌즈.The zoom lens according to claim 1, wherein the third lens group consists of a spherical lens having a convex surface on the object side. 제2항에 있어서, 제3렌즈군은 양 볼록렌즈로 형성됨을 특징으로 하는 줌 렌즈.The zoom lens of claim 2, wherein the third lens group is formed of both convex lenses. 제1항에 있어서, 다음의 조건을 만족하는 것을 특징으로 하는 줌 렌즈.The zoom lens according to claim 1, wherein the following conditions are satisfied. 3.0 <f1/fw <7.0. 0.6 < /f2/ /fw <1.6, 2.0 f3/fw <7.0, 2.0 <f4/fw <5.0, 0.02 <d12/f4 <1.0, 0.3 <r11/f3 <1.5, 0.3 < /r13/ /f4 <1.33.0 <f1 / fw <7.0. 0.6 </ f2 / / fw <1.6, 2.0 f3 / fw <7.0, 2.0 <f4 / fw <5.0, 0.02 <d12 / f4 <1.0, 0.3 <r11 / f3 <1.5, 0.3 </ r13 / / f4 <1.3 여기서, fw ; 광각단에 의한 초점거리 f1,f2,f3,f4 ; 각 렌즈군의 초점거리, d12 ; 제3렌즈군과 제4렌즈군의 공기 간격, r11 ; 제3렌즈군을 구성하는 정 렌즈의 물체측 곡율반경, r13 ; 제4렌즈군을 구성하는 부 렌즈의 물체측 곡율반경이다.Where fw; Focal lengths f1, f2, f3, f4 by the wide-angle end; Focal length of each lens group, d12; An air gap between the third lens group and the fourth lens group, r11; The object-side curvature radius of the positive lens constituting the third lens group, r13; The object-side curvature radius of the sub-lenses constituting the fourth lens group. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940004366A 1994-03-07 1994-03-07 Zoom lens KR100257327B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940004366A KR100257327B1 (en) 1994-03-07 1994-03-07 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940004366A KR100257327B1 (en) 1994-03-07 1994-03-07 Zoom lens

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Publication Number Publication Date
KR950027424A true KR950027424A (en) 1995-10-16
KR100257327B1 KR100257327B1 (en) 2000-05-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100745509B1 (en) * 2005-10-13 2007-08-02 삼성테크윈 주식회사 Zoom lens having wide angle and high zooming ratio and camera employing the same
KR101977501B1 (en) 2017-12-05 2019-09-10 한국가스공사 Internal inspection and maintenance method of 9% Ni liquefied natural gas storage tanks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6141004B2 (en) * 2012-12-27 2017-06-07 キヤノン株式会社 Zoom lens and imaging apparatus having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100745509B1 (en) * 2005-10-13 2007-08-02 삼성테크윈 주식회사 Zoom lens having wide angle and high zooming ratio and camera employing the same
KR101977501B1 (en) 2017-12-05 2019-09-10 한국가스공사 Internal inspection and maintenance method of 9% Ni liquefied natural gas storage tanks

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KR100257327B1 (en) 2000-05-15

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