CN204536643U - A kind of zoom lens - Google Patents
A kind of zoom lens Download PDFInfo
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- CN204536643U CN204536643U CN201520251282.2U CN201520251282U CN204536643U CN 204536643 U CN204536643 U CN 204536643U CN 201520251282 U CN201520251282 U CN 201520251282U CN 204536643 U CN204536643 U CN 204536643U
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Abstract
The utility model relates to a kind of zoom lens, comprise successively from the object side to the image side: the first lens combination, it has negative refractive power and position can be moved along optical axis direction, described first lens combination comprise successively from the object side to the image side there is negative power the first front lens, there is the second front lens of negative power and there is the rear lens of positive light coke; Second lens combination, it has positive refractive power and position can be moved along optical axis direction, and described second lens combination comprises the first positive lens, the balsaming lens be made up of the second positive lens and negative lens, the 3rd positive lens, the 4th positive lens from the object side to the image side successively.The beneficial effects of the utility model are: provide that volume is little, the zoom lens of low cost, high definition, reach more than 130 ° field angle, the zoom ratio of more than 3 times in wide-angle side, and the clear aperature realizing F1.4; The various aberration of good rectification, production and assembly good manufacturability; Be applicable to being used in various CCTV camera, or in other videograph video cameras.
Description
Technical field
The utility model relates to zoom lens, particularly relates to that a kind of volume is little, cost is low, the zoom shot camera lens of large wide-angle, high definition.
Background technology
In protection and monitor field, along with the miniaturization of electronic image pickup device, install and also require further miniaturization with the zoom lens of electronic image pickup device, very many schemes have been put forward in order to meet such requirement, but much in order to miniaturization has added plastic cement aspherical lens, cause temperature coefficient too sensitivity at high temperature camera lens solution picture variation, what have has added the aspheric surface of glass, although without temperature coefficient sensitive issue, cost adds a lot.
Summary of the invention
For the weak point existed in the problems referred to above, the utility model provides that a kind of volume is little, cost is low, the zoom shot camera lens of large wide-angle, high definition.
For achieving the above object, the utility model provides a kind of zoom lens, comprises successively from the object side to the image side:
First lens combination, it has negative refractive power and position can be moved along optical axis direction, described first lens combination comprise successively from the object side to the image side there is negative power the first front lens, there is the second front lens of negative power and there is the rear lens of positive light coke;
Second lens combination, it has positive refractive power and position can be moved along optical axis direction, and described second lens combination comprises the first positive lens, the balsaming lens be made up of the second positive lens and negative lens, the 3rd positive lens, the 4th positive lens from the object side to the image side successively;
The focal length of described first lens combination and described second lens combination satisfies the following conditional expression:
0.8<∣F
l/F
2∣<1.0；
0.3<∣F
0/F
1∣<0.5；
Wherein, F
1for the focal length of described first lens combination, F
2for the focal length of described second lens combination, F
0for the focal length of unlimited distance wide-angle side.
Improve further as the utility model, also satisfy condition formula:
Y
max/F
w > 2；
Wherein, Y
maxfor maximum real image is high, F
wfor the focal length of wide-angle side in described zoom lens.
Improve further as the utility model, described first front lens satisfies condition formula:
D
1/T
1< 0.5；
Wherein, D
1for the first front lens central point described in described first lens combination is to the distance of aperture, T
1for described zoom lens is in the total length of wide-angle side, be the first front lens central point described in described first lens combination to the distance of image planes.
Improve further as the utility model, described first front lens, described second front lens, described rear lens, described first positive lens, described second positive lens, described negative lens, described 3rd positive lens and described 4th positive lens are spheric glass.
The beneficial effects of the utility model are:
1, provide that volume is little, the zoom lens of low cost, high definition, reach more than 130 ° field angle in wide-angle side, the zoom ratio of more than 3 times, and the clear aperature realizing F1.4;
2, the various aberration of good rectification, production and assembly good manufacturability;
3, be applicable to being used in various CCTV camera, or in other videograph video cameras.
Accompanying drawing explanation
The zoom lens that Fig. 1 provides for the utility model is at the structural representation of wide-angle side;
The zoom lens that Fig. 2 provides for the utility model is at the structural representation of intermediate ends;
The zoom lens that Fig. 3 provides for the utility model is at the structural representation of telescope end.
In figure: G1, the first lens combination; G2, the second lens combination; L1, the first front lens; L2, the second front lens; L3, rear lens; L4, the first positive lens; L5, the second positive lens; L6, negative lens; L7, the 3rd positive lens; L8, the 4th positive lens.
Embodiment
As Figure 1-3, a kind of zoom lens described in the utility model embodiment, comprises from the object side to the image side successively:
First lens combination G1, it has negative refractive power and position can be moved along optical axis direction, the first lens combination G1 comprise successively from the object side to the image side there is negative power the first front lens L1, there is the second front lens L2 of negative power and there is the rear lens L3 of positive light coke.
Second lens combination G2, it has positive refractive power and position can be moved along optical axis direction, and the second lens combination G2 comprises the first positive lens L4, the balsaming lens be made up of the second positive lens L5 and negative lens L6, the 3rd positive lens L7, the 4th positive lens L8 from the object side to the image side successively.
In zooming procedure, from wide-angle side to telescope end, the interval of the second lens combination G2 and the first lens combination G1 reduces gradually, and the first lens combination G1 moves to image space, and the second lens combination G2 moves to object space.
The focal length of the first lens combination G1 and the second lens combination G2 satisfies the following conditional expression:
0.8<∣F
l/F
2∣<1.0；
0.3<∣F
0/F
1∣<0.5；
Wherein, F
1be the focal length of the first lens combination G1, F
2be the focal length of the second lens combination G2, F
0for the focal length of unlimited distance wide-angle side.
Also satisfy condition formula:
Y
max/F
w > 2；
Wherein, Y
maxfor maximum real image is high, F
wfor the focal length of wide-angle side in zoom lens.
Also satisfy condition formula:
D
1/T
1< 0.5；
Wherein, D
1be in the first lens combination G1 the first front lens L1 central point to the distance of aperture, T
1for zoom lens is in the total length of wide-angle side, to be in the first lens combination G1 the first front lens L1 central point to the distance of image planes.
Wherein, the first front lens L1, the second front lens L2, rear lens L3, the first positive lens L4, the second positive lens L5, negative lens L6, the 3rd positive lens L7 and the 4th positive lens L8 are spheric glass.
Wherein, the concrete implementation data that in zoom lens, each eyeglass meets is as table 1 and table 2.
Table 1:
Table 2:
In the present embodiment, this amasthenic lens can reach the wide-angle of 130 °, the zoom ratio of 3 times, the large clear aperature of 1.6, and in whole zooming range, imaging definition is good.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a zoom lens, is characterized in that, comprises successively from the object side to the image side:
First lens combination (G1), it has negative refractive power and position can be moved along optical axis direction, described first lens combination (G1) comprise successively from the object side to the image side there is negative power the first front lens (L1), there is second front lens (L2) of negative power and there is the rear lens (L3) of positive light coke;
Second lens combination (G2), it has positive refractive power and position can be moved along optical axis direction, and described second lens combination (G2) comprises the first positive lens (L4), the balsaming lens be made up of the second positive lens (L5) and negative lens (L6), the 3rd positive lens (L7), the 4th positive lens (L8) from the object side to the image side successively;
Described first lens combination (G1) satisfies the following conditional expression with the focal length of described second lens combination (G2):
0.8<∣F
l/F
2∣<1.0；
0.3<∣F
0/F
1∣<0.5；
Wherein, F
1for the focal length of described first lens combination (G1), F
2for the focal length of described second lens combination (G2), F
0for the focal length of unlimited distance wide-angle side.
2. a kind of zoom lens according to claim 1, it is characterized in that, also satisfy condition formula:
Y
max/F
w> 2；
Wherein, Y
maxfor maximum real image is high, F
wfor the focal length of wide-angle side in described zoom lens.
3. a kind of zoom lens according to claim 1, is characterized in that, described first front lens (L1) satisfies condition formula:
D
1/T
1< 0.5；
Wherein, D
1for the first front lens (L1) central point described in described first lens combination (G1) is to the distance of aperture, T
1for described zoom lens is in the total length of wide-angle side, be the first front lens (L1) central point described in described first lens combination (G1) to the distance of image planes.
4. a kind of zoom lens according to claim 1, is characterized in that: described first front lens (L1), described second front lens (L2), described rear lens (L3), described first positive lens (L4), described second positive lens (L5), described negative lens (L6), described 3rd positive lens (L7) and described 4th positive lens (L8) are spheric glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520251282.2U CN204536643U (en) | 2015-04-24 | 2015-04-24 | A kind of zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520251282.2U CN204536643U (en) | 2015-04-24 | 2015-04-24 | A kind of zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536643U true CN204536643U (en) | 2015-08-05 |
Family
ID=53750625
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520251282.2U Active CN204536643U (en) | 2015-04-24 | 2015-04-24 | A kind of zoom lens |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137580A (en) * | 2015-09-11 | 2015-12-09 | 舜宇光学(中山)有限公司 | Day-night dual-purpose zoom lens capable of eliminating heat difference |
| CN105739070A (en) * | 2016-04-25 | 2016-07-06 | 佛山华国光学器材有限公司 | Wide-angle zooming optical system with multiple glued lenses |
| CN106338816A (en) * | 2016-10-19 | 2017-01-18 | 佛山华国光学器材有限公司 | Ultra high definition wide-angle zooming optical system |
| CN107783265A (en) * | 2016-08-29 | 2018-03-09 | 扬明光学股份有限公司 | Optical lens |
| CN108983400A (en) * | 2017-06-01 | 2018-12-11 | 富晋精密工业（晋城）有限公司 | Bugeye lens |
| CN110174756A (en) * | 2019-06-27 | 2019-08-27 | 东莞市宇瞳光学科技股份有限公司 | A kind of zoom lens |
-
2015
- 2015-04-24 CN CN201520251282.2U patent/CN204536643U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137580A (en) * | 2015-09-11 | 2015-12-09 | 舜宇光学(中山)有限公司 | Day-night dual-purpose zoom lens capable of eliminating heat difference |
| CN105739070A (en) * | 2016-04-25 | 2016-07-06 | 佛山华国光学器材有限公司 | Wide-angle zooming optical system with multiple glued lenses |
| CN105739070B (en) * | 2016-04-25 | 2018-08-21 | 佛山华国光学器材有限公司 | A kind of wide-angle zoom optic system containing more cemented doublets |
| CN107783265A (en) * | 2016-08-29 | 2018-03-09 | 扬明光学股份有限公司 | Optical lens |
| CN107783265B (en) * | 2016-08-29 | 2024-06-11 | 扬明光学股份有限公司 | Optical lens |
| CN106338816A (en) * | 2016-10-19 | 2017-01-18 | 佛山华国光学器材有限公司 | Ultra high definition wide-angle zooming optical system |
| CN108983400A (en) * | 2017-06-01 | 2018-12-11 | 富晋精密工业（晋城）有限公司 | Bugeye lens |
| CN110174756A (en) * | 2019-06-27 | 2019-08-27 | 东莞市宇瞳光学科技股份有限公司 | A kind of zoom lens |
| CN110174756B (en) * | 2019-06-27 | 2024-05-24 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220512 Address after: No. 8, Hongda Road, Hongtang village, Tongsheng street, Yuhua District, Changsha City, Hunan Province, 410116 Patentee after: HUNAN CHIOPT OPTICAL TECHNOLOGY Co.,Ltd. Address before: 511442 2nd floor, No.1 Workshop, Jinshan Industrial Park, pengdizhuang, lirendong village, Nancun Town, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU CHIOPT OPTOTECH Co.,Ltd. |
|
| TR01 | Transfer of patent right |