CN204595310U - Camera lens - Google Patents
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- CN204595310U CN204595310U CN201520356016.6U CN201520356016U CN204595310U CN 204595310 U CN204595310 U CN 204595310U CN 201520356016 U CN201520356016 U CN 201520356016U CN 204595310 U CN204595310 U CN 204595310U
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- lens
- pick
- aperture diaphragm
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- aspheric surface
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000005308 flint glass Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 13
- 230000004075 alteration Effects 0.000 abstract description 8
- 201000009310 astigmatism Diseases 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a camera lens, include first lens, second lens, aperture diaphragm, third lens and the fourth lens of arranging in proper order along thing side to picture side. The camera lens adopting the technical scheme adopts the four lenses and the aperture diaphragm, so that the emergent angle of the main light ray of the system can be reduced, and off-axis aberration can be well corrected. The aperture diaphragm is arranged at the back, and the spherical aberration and the astigmatism can be reduced to a certain degree. Meanwhile, the aperture diaphragm is close to the imaging surface, so that emergent rays CRA (main ray emergent angle) passing through the imaging system can be reduced as much as possible, and the imaging brightness of marginal rays is improved to a certain extent. The aperture diaphragm is arranged behind the first lens and the second lens, and can effectively receive marginal rays, and the marginal rays can still be better polymerized when the large aperture diaphragm is met. Therefore, the imaging lens not only has smaller structure, larger aperture ratio and higher performance, but also can be confocal day and night.
Description
Technical field
The utility model relates to pick-up lens, particularly a kind ofly can carry out with wide visual field angle the high resolving power day and night confocal pick-up lens taken.
Background technology
In recent years, along with the development of the imaging apparatuss such as CCD, CMOS, the requirement of monitoring field to imaging pixels also improves constantly.Along with the continuous expansion in Smart Home market, for the small-sized CCTV camera that can day and night share demand also increase, because the requirement of consuming the cost degradation produced in a large number strengthens further.Target can be seen clearly clearly by day except requiring many occasion people, also require under the condition that illumination is very low (as night) simultaneously, by secondary light source (as near-infrared LED light source, semiconductor laser light resource etc.) also can see the details of scenery clearly, for this reason, develop the day and night camera system of type, correspondingly also develop supporting seriation day and night type pick-up lens.This novel lens requires in very wide SPECTRAL REGION (from visible range near infrared spectrum district), a total optimum image plane can have image quality high equally, so just bring the problem how reducing optical system second order spectrum.This kind of camera lens of external development in recent years is generally by selecting the method such as LD optical glass material and aspheric design of low dispersion high index of refraction, solve the difficult problem that wide spectral is confocal preferably, be proposed the high definition video pick-up lens of the 1000000 grades of total pixels adapting to day and night, but its investment and processing cost higher, be several times of domestic common lens.Further, corresponding to the miniaturization of imaging apparatus, the high pixelation of imaging apparatus also in development, Pixel Dimensions minimization rapidly.In order to make pick-up lens be adapted to this imaging apparatus, for pick-up lens except the requirement of good aberration correction, the requirement obtaining sufficient diffraction resolution with the heavy caliber ratioization of camera lens also increases.
For realizing the day and night confocal pick-up lens of high-performance heavy caliber, the structure of a lot of people to camera lens is had in the industry to improve, such as in Chinese patent CN102004301, CN102279458 and CN102778746, all individually disclose a kind of pick-up lens, there is the performance of short focus, short overall length.But these pick-up lens bores are smaller, and eyeglass piece number is more, and complex structure, cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of pick-up lens, with solve existing camera lens deficiency.
According to an aspect of the present utility model, provide a kind of pick-up lens, comprise the first lens, the second lens, aperture diaphragm, the 3rd lens and the 4th lens that are arranged in order along thing side to image side, wherein,
The relative aperture of pick-up lens is at below F/2.4;
First lens are the spherical lens with negative focal power, and the first lens thing side is sphere concave surface;
Second lens are the non-spherical lens with positive focal power, and the second lens two sides is aspheric surface convex surface;
3rd lens are the spherical lens with positive focal power, and the 3rd lens two sides is sphere convex surface;
4th lens are the plano-concave lens with negative focal power, and the 4th lens thing side is sphere concave surface;
Aperture diaphragm is arranged between the 3rd lens and the second lens.
Adopt the pick-up lens of above technical scheme, adopt four lens and aperture diaphragm, system chief ray emergence angle can be reduced, and make off-axis aberration obtain well-corrected.Aperture diaphragm rearward, can less spherical aberration to a certain degree and astigmatism.Meanwhile, aperture diaphragm is near imaging surface, and the emergent ray CRA (chief ray emergence angle) be conducive to through imaging system can be as far as possible little, and the brightness of image of edge light also has and necessarily promotes effect.Aperture diaphragm is in the rear of the first lens and the second lens, effectively can accept marginal ray, and when meeting large aperture diaphragm, marginal ray still can be polymerized preferably.Thus, not only structure is less for this pick-up lens, relative aperture is larger, performance is higher, and can be day and night confocal.
In some embodiments, the surface configuration of the second lens two sides equal aspheric surface convex surface meets following equation:
In formula, parameter Z is with the intersection point of aspheric surface and optical axis for starting point, aspheric surface in the axial axially value of vertical light, the curvature of parameter c corresponding to radius; Parameter r is radial coordinate, and its unit is identical with length of lens unit, and parameter k is circular cone whose conic coefficient, parameter a
1to a
4represent the coefficient corresponding to each radial coordinate respectively;
The aspheric surface parameter of the second lens thing side convex surface is:
k＝-1.469718，a1＝-1.5146334E-003，a2＝-6.4103530E-005，a3＝-2.9608242E-005，a4＝1.9342957E-007；
The aspheric surface parameter of the second lens image side convex surface is:
k＝0.2897698，a1＝-1.6898246E-003，a2＝-1.7644513E-004，a3＝4.6863064E-006，a4＝-6.1608248E-007。
In some embodiments, the 3rd lens and the 4th lens form cemented doublet group.Thus, the performance of this pick-up lens is more stable.
In some embodiments, the focal distance f 34 of the cemented doublet group of the 3rd lens and the 4th lens formation meets: 5.56mm<f34<13.59mm.
In some embodiments, the second lens are plastic aspheric lens, and all the other lens are glass spherical lens.Plastic cement aspherical lens is easy to processing, can reduce production cost.
In some embodiments, first lens adopt dense barium flint manufacture, its focal distance f 1, Refractive Index of Material Nd1, material Abbe constant Vd1 meet :-5.56mm<f1<-3.09mm, 1.66<Nd1<1.73,35<Vd1<49;
Focal distance f 2, Refractive Index of Material Nd2, the material Abbe constant Vd2 of the second lens meet: 3.97mm<f2<9.26mm, Nd2=1.5346 ± 5%, Vd2=56.27 ± 5%;
3rd lens adopt lanthanum flint glass manufacture, and the 4th lens adopt dense flint glass manufacture.
In some embodiments, the optics overall length TTL of this pick-up lens meets: 14mm<TTL<18mm.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pick-up lens of a kind of embodiment of the utility model.
The light path system schematic diagram that Fig. 2 is pick-up lens shown in Fig. 1.
The Through Focus MTF curve map on daytime that Fig. 3 is pick-up lens shown in Fig. 1.
The infrared 850nm Through Focus MTF curve map that Fig. 4 is pick-up lens shown in Fig. 1.
The curvature of field that Fig. 5 is pick-up lens shown in Fig. 1, distortion curve figure.
Fig. 6 is for pick-up lens shown in Fig. 1 is at the transfer curve figure of 120lp/mm
Fig. 7 is the ray aberration figure of pick-up lens shown in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 to Fig. 7 show schematically show the pick-up lens according to a kind of embodiment of the present utility model.As shown in the figure, the relative aperture of this pick-up lens is F/2.0, comprises the first lens 1, second lens 2, aperture diaphragm 5, the 3rd lens 3 and the 4th lens 4 that are arranged in order along thing side to image side.
Wherein, the first lens 1 adopt dense barium flint manufacture, and for having the spherical lens of negative focal power, and the first lens thing side is sphere concave surface 11; Opposite side is sphere convex surface 12.The focal distance f 1 of the first lens 1 meets :-5.56mm<f1<-3.09mm.
Second lens 2 adopt polycarbonate plastic manufacture, and for having the non-spherical lens of positive focal power, and the second lens two sides (21,22) are aspheric surface convex surface.The focal distance f 2 of the second lens 2 meets: 3.97mm<f2<9.26mm.
33 lens lanthanum flint glass manufacture, for having the spherical lens of positive focal power, and the 3rd lens two sides (31,32) are sphere convex surface.
4th lens 4 dense flint glass, for having the plano-concave lens of negative focal power, and the 4th lens thing side is sphere concave surface 41, and opposite side is sphere convex surface 42.
3rd lens 3 and the 4th lens 4 form cemented doublet group.The focal distance f 34 of cemented doublet group meets: 5.56mm<f34<13.59mm.
Aperture diaphragm 5 is arranged between the 3rd lens 3 and the second lens 2, the aperture STO=0.2000mm of aperture diaphragm 5.
Lens focus f=2.78mm, F/NO=2.0,2 ω=112 °
Camera lens detail parameters is as follows:
The surface configuration of the second lens two sides equal aspheric surface convex surface meets following equation:
In formula, parameter Z is with the intersection point of aspheric surface and optical axis for starting point, aspheric surface in the axial axially value of vertical light, the curvature of parameter c corresponding to radius; Parameter r is radial coordinate, and its unit is identical with length of lens unit, and parameter k is circular cone whose conic coefficient, parameter a
1to a
4represent the coefficient corresponding to each radial coordinate respectively.
The aspherical surface data of the second lens is as follows:
Thing side aspheric surface 21:
k＝-1.469718；
a1＝-1.5146334E-003；
a2＝-6.4103530E-005；
a3＝-2.9608242E-005；
a4＝1.9342957E-007。
Image side aspheric surface 22:
k＝0.2897698；
a1＝-1.6898246E-003；
a2＝-1.7644513E-004；
a3＝4.6863064E-006；
a4＝-6.1608248E-007。
This pick-up lens meets the following conditions feature:
(1)-0.9<f/f1<-0.5
(2)0.3<f/f2<0.7
(3)0.2<f/f34<0.5
The optics overall length TTL of this pick-up lens meets: 14mm<TTL<18mm.
Adopt the pick-up lens of above technical scheme, adopt four lens and aperture diaphragm, system chief ray emergence angle can be reduced, and make off-axis aberration obtain well-corrected.Aperture diaphragm rearward, can less spherical aberration to a certain degree and astigmatism.Meanwhile, aperture diaphragm is near imaging surface, and the emergent ray CRA (chief ray emergence angle) be conducive to through imaging system can be as far as possible little, and the brightness of image of edge light also has and necessarily promotes effect.Aperture diaphragm is in the rear of the first lens and the second lens, effectively can accept marginal ray, and when meeting large aperture diaphragm, marginal ray still can be polymerized preferably.Thus, not only structure is less for this pick-up lens, relative aperture is larger, performance is higher, and can be day and night confocal.
In other examples, the second lens 2 can also adopt the manufacture of the plastics such as polyurethane, polyphenylene oxide, and all the other lens all can adopt the glass material manufactures such as lead glass, neodymium glass, titanium glass and niobium glass.
Above-described is only embodiments more of the present utility model.For the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (7)
1. pick-up lens, is characterized in that, comprises the first lens, the second lens, aperture diaphragm, the 3rd lens and the 4th lens that are arranged in order along thing side to image side, wherein,
The relative aperture of described pick-up lens is at below F/2.4;
Described first lens are the spherical lens with negative focal power, and described first lens thing side is sphere concave surface;
Described second lens are the non-spherical lens with positive focal power, and described second lens two sides is aspheric surface convex surface;
Described 3rd lens are the spherical lens with positive focal power, and described 3rd lens two sides is sphere convex surface;
Described 4th lens are the plano-concave lens with negative focal power, and described 4th lens thing side is sphere concave surface;
Described aperture diaphragm is arranged between described 3rd lens and the second lens.
2. pick-up lens according to claim 1, is characterized in that, the surface configuration of described second lens two sides equal aspheric surface convex surface meets following equation:
In formula, parameter z is with the intersection point of aspheric surface and optical axis for starting point, aspheric surface in the axial axially value of vertical light, the curvature of parameter c corresponding to radius; Parameter r is radial coordinate, and its unit is identical with length of lens unit, and parameter k is circular cone whose conic coefficient, parameter a
1to a
4represent the coefficient corresponding to each radial coordinate respectively;
The aspheric surface parameter of described second lens thing side convex surface is:
k＝-1.469718，a1＝-1.5146334E-003，a2＝-6.4103530E-005，a3＝-2.9608242E-005，a4＝1.9342957E-007；
The aspheric surface parameter of described second lens image side convex surface is:
k＝0.2897698，a1＝-1.6898246E-003，a2＝-1.7644513E-004，a3＝4.6863064E-006，a4＝-6.1608248E-007。
3. pick-up lens according to claim 1, is characterized in that, described 3rd lens and described 4th lens form cemented doublet group.
4. pick-up lens according to claim 1, is characterized in that, the focal distance f 34 of the cemented doublet group that described 3rd lens and described 4th lens are formed meets: 5.56mm<f34<13.59mm.
5. pick-up lens according to claim 1, is characterized in that, described second lens are plastic aspheric lens, and all the other lens are glass spherical lens.
6. the pick-up lens according to any one of claim 1 to 5, it is characterized in that, described first lens adopt dense barium flint manufacture, its focal distance f 1, Refractive Index of Material Nd1, material Abbe constant Vd1 meet :-5.56mm<f1<-3.09mm, 1.66<Nd1<1.73,35<Vd1<49;
Focal distance f 2, Refractive Index of Material Nd2, the material Abbe constant Vd2 of described second lens meet: 3.97mm<f2<9.26mm, Nd2=1.5346 ± 5%, Vd2=56.27 ± 5%;
Described 3rd lens adopt lanthanum flint glass manufacture, and described 4th lens adopt dense flint glass manufacture.
7. pick-up lens according to claim 1, is characterized in that, the optics overall length TTL of this pick-up lens meets: 14mm<TTL<18mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356016.6U CN204595310U (en) | 2015-05-28 | 2015-05-28 | Camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356016.6U CN204595310U (en) | 2015-05-28 | 2015-05-28 | Camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204595310U true CN204595310U (en) | 2015-08-26 |
Family
ID=53931453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520356016.6U Expired - Fee Related CN204595310U (en) | 2015-05-28 | 2015-05-28 | Camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204595310U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834077A (en) * | 2015-05-28 | 2015-08-12 | 中山市弘景光电科技有限公司 | Image pickup lens for image pickup device |
| CN105093501A (en) * | 2015-08-31 | 2015-11-25 | 苏州凯锝微电子有限公司 | Mobile phone wide-angle lens group |
| CN106646826A (en) * | 2016-12-12 | 2017-05-10 | 雅安格纳斯光电科技有限公司 | Day-night confocal glass and plastic hybrid lens |
| CN108897123A (en) * | 2018-09-21 | 2018-11-27 | 协益电子（苏州）有限公司 | Optical lens and automobile data recorder |
| CN108944712A (en) * | 2017-05-17 | 2018-12-07 | 法雷奥系统公司 | For protecting the device and associated driving assistance system of optical sensor |
| CN111505797A (en) * | 2019-01-31 | 2020-08-07 | 大立光电股份有限公司 | Electronic device |
| US10908391B2 (en) | 2018-07-12 | 2021-02-02 | Largan Precision Co., Ltd. | Imaging optical lens assembly, image capturing unit and electronic device |
-
2015
- 2015-05-28 CN CN201520356016.6U patent/CN204595310U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834077A (en) * | 2015-05-28 | 2015-08-12 | 中山市弘景光电科技有限公司 | Image pickup lens for image pickup device |
| CN105093501A (en) * | 2015-08-31 | 2015-11-25 | 苏州凯锝微电子有限公司 | Mobile phone wide-angle lens group |
| CN106646826A (en) * | 2016-12-12 | 2017-05-10 | 雅安格纳斯光电科技有限公司 | Day-night confocal glass and plastic hybrid lens |
| CN108944712A (en) * | 2017-05-17 | 2018-12-07 | 法雷奥系统公司 | For protecting the device and associated driving assistance system of optical sensor |
| US10908391B2 (en) | 2018-07-12 | 2021-02-02 | Largan Precision Co., Ltd. | Imaging optical lens assembly, image capturing unit and electronic device |
| US11822056B2 (en) | 2018-07-12 | 2023-11-21 | Largan Precision Co., Ltd. | Imaging optical lens assembly, image capturing unit and electronic device |
| CN108897123A (en) * | 2018-09-21 | 2018-11-27 | 协益电子（苏州）有限公司 | Optical lens and automobile data recorder |
| CN108897123B (en) * | 2018-09-21 | 2024-08-23 | 协益电子（苏州）有限公司 | Optical lens and automobile data recorder |
| CN111505797A (en) * | 2019-01-31 | 2020-08-07 | 大立光电股份有限公司 | Electronic device |
| CN111505797B (en) * | 2019-01-31 | 2021-09-07 | 大立光电股份有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 5, building 20, building 18, 528400, Pioneer Road, Torch Development Zone, Guangdong, Zhongshan Patentee after: Guangdong Hongjing Optoelectronics Technology Co., Ltd. Address before: 5, building 20, building 18, 528400, Pioneer Road, Torch Development Zone, Guangdong, Zhongshan Patentee before: ZHONGSHAN HONGJING OPTICAL TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20210528 |