KR950027424A - Zoom lens - Google Patents
Zoom lens Download PDFInfo
- 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
- Authority
- KR
- South Korea
- Prior art keywords
- lens
- lens group
- positive
- refractive power
- negative
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract 5
- 230000005499 meniscus Effects 0.000 claims abstract 2
- 238000003384 imaging method Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- 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 +-++
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- 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
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- 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
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- 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
Landscapes
- 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
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)
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950027424A true KR950027424A (en) | 1995-10-16 |
KR100257327B1 KR100257327B1 (en) | 2000-05-15 |
Family
ID=19378457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940004366A KR100257327B1 (en) | 1994-03-07 | 1994-03-07 | Zoom lens |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100257327B1 (en) |
Cited By (2)
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)
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 |
-
1994
- 1994-03-07 KR KR1019940004366A patent/KR100257327B1/en not_active IP Right Cessation
Cited By (2)
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 |
Also Published As
Publication number | Publication date |
---|---|
KR100257327B1 (en) | 2000-05-15 |
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Payment date: 20090202 Year of fee payment: 10 |
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