CN203595856U - Athermal monitoring camera lens - Google Patents
Athermal monitoring camera lens Download PDFInfo
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- CN203595856U CN203595856U CN201320708945.XU CN201320708945U CN203595856U CN 203595856 U CN203595856 U CN 203595856U CN 201320708945 U CN201320708945 U CN 201320708945U CN 203595856 U CN203595856 U CN 203595856U
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Abstract
The utility model discloses an athermal monitoring camera lens. The athermal monitoring camera lens comprises, in sequence from the object side: a first lens with positive focal power; a first glued lens with positive focal power, wherein the first glued lens is formed by gluing a second lens with positive focal power and a third lens with negative focal power; a diaphragm element; a second glued lens with positive focal power, wherein the second glued lens is formed by gluing a fourth lens with negative focal power and a fifth lens with positive focal power; a third glued lens with positive focal power, wherein the third glued lens is formed by gluing a sixth lens with negative focal power and a seventh lens with positive focal power and a refractive index having a positive correlation with the temperature; and an eighth lens with positive focal power, an identical curvature and a refractive index having a positive correlation with the temperature. According to the utility model, by the configuration of the first to eight lenses and the diaphragm, the athermal monitoring camera lens is capable of correcting the spherical aberration, astigmatism, comatic aberration and chromatic aberration within a temperature range of -45 DEG C to +85 DEG C, and keeps imaging with clearance while ensuring the stability of the image quality.
Description
[technical field]
The utility model relates to a kind of monitoring camera, more specifically say a kind of be applied to operating ambient temperature change greatly without thermalization monitoring camera.
[background technology]
Along with continuous expansion and the extension of safety monitoring camera lens application, increasing camera lens is used for various occasions, various building ring mirrors, thereby the aspect such as building ring mirror temperature, pixel resolution of camera lens has also been proposed to more and more stricter requirement.As an important branch---the road monitoring of protection and monitor field, it is extremely strict to the requirement of camera lens, requires camera lens to guarantee without out of focus (being imaging clearly) in the temperature range of-45 ℃～+ 85 ℃.But traditional safety monitoring camera lens but cannot keep imaging clearly in the temperature range of-45 ℃～+ 85 ℃, and image quality is unstable, can not meet user's demand.
Therefore, the utility model just the deficiency more than monitoring camera based on traditional produce.
[utility model content]
The utility model object is to have overcome the deficiencies in the prior art, and the wide-angle safety monitoring that provide a kind of lightweight, compact conformation, imaging clearly, has wide operating temperature range is without thermalization camera lens.
The utility model is achieved through the following technical solutions:
A kind of without thermalization monitoring camera, it is characterized in that: from thing side starts, order includes:
Have the first lens of positive focal power, described first lens is curved month type convex lens, and convex surface is towards object space, and concave surface is towards image space;
The second lens, the 3rd lens, the convex lens that the second described lens are positive light coke, the concavees lens that the 3rd described lens are negative power, the second described lens and described the 3rd lens gummed form the first gummed eyeglass of positive light coke, the convex surface of the first described gummed eyeglass is towards object space, and concave surface is towards image space;
Aperture member;
The 4th lens, the 5th lens, the biconcave lens that the 4th described lens are negative power, the biconvex lens that the 5th described lens are positive light coke, the 4th described lens and described the 5th lens gummed form the second gummed eyeglass of positive light coke, the concave surface of the second described gummed eyeglass is towards object space, and convex surface is towards image space;
The 6th lens, the 7th lens, the concavees lens that the 6th described lens are negative power, the 7th described lens are the positively related glass convex lens of positive light coke, refractive index and temperature, the 6th described lens and described the 7th lens gummed form the 3rd gummed eyeglass of positive light coke, the concave surface of the 3rd described gummed eyeglass is towards object space, and convex surface is towards image space;
The 8th identical lens of curvature with positive light coke, the 8th described lens are the positively related glass biconvex lens of refractive index and temperature;
One as above is without thermalization monitoring camera, it is characterized in that: described first lens meets condition below: 1.85 >=Nd >=1.7,35 >=Vd >=23.5, wherein Nd represents the d optical index of first lens material, Vd represents the d light Abbe constant of first lens material.
One as above, without thermalization monitoring camera, is characterized in that: described first lens focal distance f
l1with described without the total focal distance f of thermalization camera lens
f0between meet: 0.8f
f0>=f
l1>=1.2f
f0.
One as above is without thermalization monitoring camera, it is characterized in that: the second described lens meet condition below: 1.7 >=Nd >=1.6,64 >=Vd >=50, wherein Nd represents the d optical index of the second lens material, Vd represents the d light Abbe constant of the second lens material.
One as above is without thermalization monitoring camera, it is characterized in that: the 3rd described lens meet condition below: 1.85 >=Nd >=1.6,35 >=Vd >=23.5, wherein Nd represents the d optical index of the 3rd lens material, Vd represents the d light Abbe constant of the 3rd lens material.
One as above, without thermalization monitoring camera, is characterized in that: the 4th described focal length of lens f
l4with the 5th described focal length of lens f
l5between meet :-1.2>=f
l4/ f
l5>=-0.4.
One as above, without thermalization monitoring camera, is characterized in that: the 6th described focal length of lens f
l6with the 7th described focal length of lens f
l7between meet :-1.4>=f
l6/ f
l7>=-0.5.
One as above is without thermalization monitoring camera, it is characterized in that: the 8th described lens meet condition below: 1.93 >=Nd >=1.85,45 >=Vd >=25, wherein Nd represents the d optical index of the 8th lens material, Vd represents the d light Abbe constant of the 8th lens material.
One as above, without thermalization monitoring camera, is characterized in that: the cemented surface between the second described lens and described the 3rd lens, described the 4th lens and described the 5th lens, described the 6th lens and described the 7th lens is plane.
One as above, without thermalization monitoring camera, is characterized in that: the focal distance f of the lens combination that described first lens, the second lens, the 3rd lens form
l1L2L3focal distance f with the lens combination of the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens composition
l4L5L6L7L8meet following formula: 2≤f
l1L2L3/ f
l4L5L6L7L8≤ 2.5.
Compared with prior art, the utility model has the following advantages:
1, the utility model is by the configuration of first lens to the eight lens and diaphragm, can be in the temperature range of-45 ℃～+ 85 ℃ spherical aberration corrector, astigmatism, coma, aberration, and can proofread and correct with produced color difference in metal spacer ring due to temperature variation cause airspace change, thereby burnt null displacement after realizing, in compared with large-temperature range (45 ℃～+ 85 ℃), keep the stable of picture element, make camera lens keep blur-free imaging in the temperature range of-45 ℃～+ 85 ℃, and guarantee that picture element is stable.
2, the utility model is high without thermalization monitoring camera reliability, and compact conformation is lightweight.
3, the utility model is without thermalization monitoring camera manual focusing, without power supply, cost-saving.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model (thing side is positioned at camera lens left side);
Fig. 2 is the utility model MTF(modulation transfer function in the time of 25 ℃) curve map;
Fig. 3 is the utility model out of focus curve map in the time of 25 ℃;
Fig. 4 is the utility model out of focus curve map in the time of-45 ℃;
Fig. 5 is the utility model out of focus curve map in the time of 85 ℃;
Fig. 6 is curvature of field curve map of the present utility model;
Fig. 7 is distortion curve figure of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is further described:
Case study on implementation of the present utility model as shown in Figure 1, is used in outdoor road monitoring.This camera lens includes successively from thing side: first lens L1, the second lens L2, the 3rd lens L3, aperture member r8, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7, the 8th lens L8, optical filter IR-CUT, imaging surface IMA.
First lens L1 is the curved month type convex lens with positive light coke, and convex surface is towards object space, and concave surface, can spherical aberration corrector and astigmatism towards image space.
The convex lens that the second lens L2 is positive light coke, the concavees lens that the 3rd lens L3 is negative power, the second lens L2 and the 3rd lens L3 gummed form the first gummed eyeglass J1 of positive focal power, and the convex surface of the first gummed eyeglass J1 is towards object space, and concave surface is towards image space.The first gummed eyeglass J1 can proofread and correct the aberration that first lens L1 produces.
The biconcave lens that the 4th lens L4 is negative power, the biconvex lens that the 5th lens L5 is positive light coke, the 4th lens L4 and the 5th lens L5 gummed form the second gummed eyeglass J2 of positive focal power, and the concave surface of the second gummed eyeglass J2 is towards object space, and convex surface is towards image space.The second gummed eyeglass J2 can proofread and correct coma and astigmatism.
The concavees lens that the 6th lens L6 is negative power, the 7th lens L7 is the positively related convex lens of positive light coke, refractive index and temperature, the 6th lens L6 and the 7th lens L7 gummed form the 3rd gummed eyeglass J3 of positive focal power, and the concave surface of the 3rd gummed eyeglass J3 is towards object space, and convex surface is towards image space.The 3rd gummed eyeglass J3 can corrective system aberration.
The 8th lens L8 has positive light coke, refractive index and temperature positive correlation, glass biconvex lens that curvature is identical, can spherical aberration corrector, astigmatism and the curvature of field.The 8th lens L8 has same curvature radius, and processing and manufacturing is simple, can reduce production costs.
The 7th described lens L7 and the 8th lens L8 are refractive index and the positively related glass mirror of temperature, can proofread and correct with produced color difference in metal spacer ring (GQ1, GQ2, GQ3, GQ4) due to temperature variation cause airspace change, thereby burnt null displacement after realizing keeps the stable of picture element in compared with large-temperature range (45 ℃～+ 85 ℃).
Aperture member r8 is located between the 3rd lens L3 and the 4th lens L4, and the large airspace between the 3rd lens L3 and the 4th lens L4 is suitable for freely selecting to arrange automatic diaphragm element or manual iris element therein.
Optimal way as the present embodiment:
First lens L1 meets condition below: 1.85 >=Nd >=1.7, and 35 >=Vd >=23.5, wherein Nd represents the d optical index of first lens L1 material, Vd represents the d light Abbe constant of first lens L1 material.
First lens L1 focal distance f
l1with without the total focal distance f of thermalization camera lens
f0between meet: 0.8f
f0>=f
l1>=1.2f
f0.
The second lens L2 meets condition below: 1.7 >=Nd >=1.6, and 64 >=Vd >=50, wherein Nd represents the d optical index of the second lens L2 material, Vd represents the d light Abbe constant of the second lens L2 material.
The 3rd described lens L3 meets condition below: 1.85 >=Nd >=1.6, and 35 >=Vd >=23.5, wherein Nd represents the d optical index of the 3rd lens L3 material, Vd represents the d light Abbe constant of the 3rd lens L3 material.
The 4th lens L4 focal distance f
l4with the 5th lens L5 focal distance f
l5between meet :-1.2>=f
l4/ f
l5>=-0.4.
The 6th lens L6 focal distance f
l6with the 7th lens L7 focal distance f
l7between meet :-1.4>=f
l6/ f
l7>=-0.5.
The 8th lens L8 meets condition below: 1.93 >=Nd >=1.85, and 45 >=Vd >=25, wherein Nd represents the d optical index of the 8th lens L8 material, Vd represents the d light Abbe constant of the 8th lens L8 material.
The cemented surface of the second lens L2 and the 3rd lens L3, the 4th lens L4 and the 5th lens L5, the 6th lens L6 and the 7th lens L7 is plane, and such structure is applicable to the multi-disc processing of eyeglass, greatly reduces production cost.
First lens L1 adopts height refraction, high chromatic dispersion material to make, and high refraction is conducive to the spherical aberration that large aperture produces, and high dispersion is conducive to the aberration of the lens combination before balance aperture member r8 and the generation of lens combination below.
The focal distance f of described first lens L1, the second lens L2, the lens combination of the 3rd lens L3 composition
l1L2L3focal distance f with the lens combination of the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7, the 8th lens L8 composition
l4L5L6L7L8meet following formula: 2≤f
l1L2L3/ f
l4L5L6L7L8≤ 2.5.
Fig. 2 to Fig. 7 is the optical performance curve figure corresponding to embodiment.Fig. 2 is the utility model MTF(modulation transfer function in the time of 25 ℃) curve map, modulation transfer function (MTF) is under certain space frequency, degree of modulation than the function of space frequency between actual picture and ideal picture.MTF curve horizontal ordinate be every millimeter of line of spatial frequency lp/mm(to), ordinate is contrast (%).Curve is higher, shows that image quality is better.Different curves represents different image heights, and T and S represent respectively the MTF of meridian and sagitta of arc direction.Known by Fig. 2, in full visual field, resolving power reaches 90lp/mm>45%, meets camera lens 8,000,000 pixel requests completely; Fig. 3 is the utility model out of focus curve map in the time of 25 ℃, out of focus curve shows the relation of meridian, sagitta of arc MTF and defocusing amount to the different visual fields of setting space frequency, in figure, horizontal ordinate is defocusing amount, ordinate is contrast, whether the optimal focal plane that can find out each visual field by this figure is more consistent, and whether MTF is more responsive to out of focus.Each visual field optimal focal plane is basically identical as shown in Figure 3, and each visual field picture element is evenly clear; Fig. 4 is the utility model out of focus curve map in the time of-45 ℃, and during as shown in Figure 4 in low temperature-45 ℃, compared with 25 ℃ of out of focus curves, without obvious out of focus, picture element is clear; Fig. 5 is the utility model out of focus curve map in the time of 85 ℃, and as shown in Figure 5 in the time of 85 ℃ of high temperature, compared with 25 ℃ of out of focus curves, without obvious out of focus, picture element is clear; Fig. 6 is curvature of field curve map of the present utility model, by the F commonly using, d, C(F=0.486um, d=0.588um, C=0.656um) three look light wavelengths represent, T and S represent respectively meridian and sagitta of arc amount, and ordinate is visual field, unit is angle, and horizontal ordinate is the curvature of field, and unit is millimeter (mm); Fig. 7 is distortion curve figure of the present utility model, and ordinate is visual field, and horizontal ordinate is the percent value of distortion.Distortion curve figure represents the distortion sizes values in different field angle situations, and unit is %, and the abnormal change of the optics of system ∣ TVdistortion ∣≤5%, belongs to little distortion as shown in Figure 7, meets the designing requirement of road monitoring to distortion.So from Fig. 2 to Fig. 7, this optical lens is by various aberration corrections to good level.
In the implementation case, optical system preferred parameter value is as following table:
| Effective focal length | 40mm |
| F/#(aperture) | 1.9 |
| Burnt after optics | 21.6mm |
| Field angle | 33° |
The value of corresponding each element is as following table
In upper table, radius-of-curvature refers to the radius-of-curvature on each surface, and spacing refers to the distance between two adjacently situated surfaces, for instance, and the spacing on surface 1, i.e. distance between surface 1 and surface 2.Refractive index and Abbe number are refractive index and the Abbe numbers of corresponding element, and for instance, the refractive index of the second lens L2 is 63.4, Abbe number is 1.62; The refractive index of the 3rd lens L3 is 27.5, Abbe number is 1.77.
Claims (10)
1. without a thermalization monitoring camera, it is characterized in that: from thing side starts, order includes:
Have the first lens (L1) of positive focal power, described first lens (L1) is curved month type convex lens, and convex surface is towards object space, and concave surface is towards image space;
The second lens (L2), the 3rd lens (L3), the convex lens that described the second lens (L2) are positive light coke, the concavees lens that the 3rd described lens (L3) are negative power, described the second lens (L2) form first of positive light coke with the 3rd described lens (L3) gummed and glue together eyeglass (J1), the convex surface of the first described gummed eyeglass (J1) is towards object space, and concave surface is towards image space;
Aperture member (r8);
The 4th lens (L4), the 5th lens (L5), the biconcave lens that the 4th described lens (L4) are negative power, the biconvex lens that the 5th described lens (L5) are positive light coke, the 4th described lens (L4) form second of positive light coke with the 5th described lens (L5) gummed and glue together eyeglass (J2), the concave surface of the second described gummed eyeglass (J2) is towards object space, and convex surface is towards image space;
The 6th lens (L6), the 7th lens (L7), the concavees lens that the 6th described lens (L6) are negative power, the 7th described lens (L7) are the positively related glass convex lens of positive light coke, refractive index and temperature, the 6th described lens (L6) form the 3rd of positive light coke with the 7th described lens (L7) gummed and glue together eyeglass (J3), the concave surface of the 3rd described gummed eyeglass (J3) is towards object space, and convex surface is towards image space;
The 8th identical lens (L8) of curvature with positive light coke, the 8th described lens (L8) are the positively related glass biconvex lens of refractive index and temperature;
2. one according to claim 1 is without thermalization monitoring camera, it is characterized in that: described first lens (L1) meets condition below: 1.85 >=Nd >=1.7,35 >=Vd >=23.5, wherein Nd represents the d optical index of first lens (L1) material, and Vd represents the d light Abbe constant of first lens (L1) material.
3. one according to claim 1, without thermalization monitoring camera, is characterized in that: described first lens (L1) focal distance f
l1with described without the total focal distance f of thermalization camera lens
f0between meet: 0.8f
f0>=f
l1>=1.2f
f0.
4. one according to claim 1 is without thermalization monitoring camera, it is characterized in that: described the second lens (L2) meet condition below: 1.7 >=Nd >=1.6,64 >=Vd >=50, wherein Nd represents the d optical index of the second lens (L2) material, and Vd represents the d light Abbe constant of the second lens (L2) material.
5. one according to claim 1 is without thermalization monitoring camera, it is characterized in that: the 3rd described lens (L3) meet condition below: 1.85 >=Nd >=1.6,35 >=Vd >=23.5, wherein Nd represents the d optical index of the 3rd lens (L3) material, and Vd represents the d light Abbe constant of the 3rd lens (L3) material.
6. one according to claim 1, without thermalization monitoring camera, is characterized in that: the 4th described lens (L4) focal distance f
l4with the 5th described lens (L5) focal distance f
l5between meet :-1.2>=f
l4/ f
l5>=-0.4.
7. one according to claim 1, without thermalization monitoring camera, is characterized in that: the 6th described lens (L6) focal distance f
l6with the 7th described lens (L7) focal distance f
l7between meet :-1.4>=f
l6/ f
l7>=-0.5.
8. one according to claim 1 is without thermalization monitoring camera, it is characterized in that: the 8th described lens (L8) meet condition below: 1.93 >=Nd >=1.85,45 >=Vd >=25, wherein Nd represents the d optical index of the 8th lens (L8) material, and Vd represents the d light Abbe constant of the 8th lens (L8) material.
9. one according to claim 1, without thermalization monitoring camera, is characterized in that: the cemented surface between described the second lens (L2) and described the 3rd lens (L3), described the 4th lens (L4) and described the 5th lens (L5), described the 6th lens (L6) and described the 7th lens (L7) is plane.
10. one according to claim 1, without thermalization monitoring camera, is characterized in that: the focal distance f of the lens combination that described first lens (L1), the second lens (L2), the 3rd lens (L3) form
l1L2L3focal distance f with the lens combination of the 4th lens (L4), the 5th lens (L5), the 6th lens (L6), the 7th lens (L7), the 8th lens (L8) composition
l4L5L6L7L8meet following formula: 2≤f
l1L2L3/ f
l4L5L6L7L8≤ 2.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708945.XU CN203595856U (en) | 2013-11-11 | 2013-11-11 | Athermal monitoring camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708945.XU CN203595856U (en) | 2013-11-11 | 2013-11-11 | Athermal monitoring camera lens |
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| CN203595856U true CN203595856U (en) | 2014-05-14 |
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| CN201320708945.XU Withdrawn - After Issue CN203595856U (en) | 2013-11-11 | 2013-11-11 | Athermal monitoring camera lens |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558677A (en) * | 2013-11-11 | 2014-02-05 | 舜宇光学(中山)有限公司 | Athermal monitoring camera lens |
| TWI600923B (en) * | 2016-10-19 | 2017-10-01 | 大立光電股份有限公司 | Photographing optical lens system, image capturing device and electronic device |
| CN107748433A (en) * | 2017-11-24 | 2018-03-02 | 嘉兴中润光学科技有限公司 | Wide-angle interchangeable tight shot |
| CN109425959A (en) * | 2017-08-29 | 2019-03-05 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| WO2020200309A1 (en) * | 2019-04-04 | 2020-10-08 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging device |
| CN112269242A (en) * | 2020-11-23 | 2021-01-26 | 中国科学院自动化研究所苏州研究院 | High-resolution oblique image lens |
| CN114019658A (en) * | 2019-11-06 | 2022-02-08 | 浙江舜宇光学有限公司 | Optical imaging lens |
-
2013
- 2013-11-11 CN CN201320708945.XU patent/CN203595856U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558677A (en) * | 2013-11-11 | 2014-02-05 | 舜宇光学(中山)有限公司 | Athermal monitoring camera lens |
| CN103558677B (en) * | 2013-11-11 | 2015-11-18 | 舜宇光学(中山)有限公司 | A kind of without thermalization monitoring camera |
| TWI600923B (en) * | 2016-10-19 | 2017-10-01 | 大立光電股份有限公司 | Photographing optical lens system, image capturing device and electronic device |
| CN109425959A (en) * | 2017-08-29 | 2019-03-05 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN109425959B (en) * | 2017-08-29 | 2021-07-16 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN107748433A (en) * | 2017-11-24 | 2018-03-02 | 嘉兴中润光学科技有限公司 | Wide-angle interchangeable tight shot |
| WO2020200309A1 (en) * | 2019-04-04 | 2020-10-08 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging device |
| CN114019658A (en) * | 2019-11-06 | 2022-02-08 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN114019658B (en) * | 2019-11-06 | 2023-07-04 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112269242A (en) * | 2020-11-23 | 2021-01-26 | 中国科学院自动化研究所苏州研究院 | High-resolution oblique image lens |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140514 Effective date of abandoning: 20151118 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |