CN203773133U - Multifunctional fish-eye lens - Google Patents
Multifunctional fish-eye lens Download PDFInfo
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- CN203773133U CN203773133U CN201420149338.9U CN201420149338U CN203773133U CN 203773133 U CN203773133 U CN 203773133U CN 201420149338 U CN201420149338 U CN 201420149338U CN 203773133 U CN203773133 U CN 203773133U
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- 241000251468 Actinopterygii Species 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 230000005499 meniscus Effects 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract 1
- 230000004075 alteration Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 3
- 230000004304 visual acuity Effects 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model provides a multifunctional fish-eye lens which comprises a lens group. The lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are coaxial and are arranged in sequence from the object side to the image side. A diaphragm is arranged between the fourth lens and the fifth lens; the focal lengths of the first lens, the second lens, the third lens and the fifth lens are negative; and the focal lengths of the fourth lens, the sixth lens and the seventh lens are positive. The lens group meets the following conditions: the first lens meets the conditions: Nd>1.75, Vd>35; the fourth lens meets the conditions: Nd>1.75, Vd>30; the fifth lens meets the conditions: Nd>1.82; and the sixth lens meets the following conditions: Vd>35. The multifunctional fish-eye lens can realize 185-degree super-large view field under the condition of a larger relative aperture, of which F/no is less than 2; meanwhile, 80% and the above relative illumination at the 185-degree view field can be realized; 300 W pixel high-definition image quality can be output; and meanwhile, the focal positions of infrared and visible light can be kept roughly the same, and co-focal effect is realized.
Description
Technical field
The utility model relates to a kind of imaging optical system, relates in particular to a kind of multi-functional fish eye lens.
Background technology
The camera lens technical specification that the super wide-angle of 180 degree is adaptation security protection, vehicle-mounted, video conference needs propose, but along with the angle of view becomes large and even exceedes 180 degree, periphery light reduces than meeting thereupon, and can there is darker defect in picture periphery; And 6 common slice structures improve the processibility of first piece of meniscus shaped lens by sacrificing picture element on the market, thereby cannot export high picture element.And object lens of large relative aperture is the demand that adapts to security protection, vehicle-mounted, video conference, for camera lens requirement.Object lens of large relative aperture can improve illuminance of image plane.But similar camera lens on the market, along with increase, the picture element variation thereupon of relative aperture.Meanwhile, the new demand that be infraredly confocally that current Chinese market is vehicle-mounted, security protection industry proposes.Namely with a camera lens under the prerequisite of Nonadjustable focusing, realize visible, the infrared sharply defined image that simultaneously becomes.
Camera lens in the market, cannot meet simultaneously security protection, vehicle-mounted, video conference for a camera lens possess simultaneously object lens of large relative aperture, high periphery light than, surpass 180 degree wide-angles, high periphery light ratio, high resolving power, infrared confocal demand, unless adopt larger Lens, more eyeglasses and more complicated structure, but this kind of way will cause the generation high cost of camera lens.
Summary of the invention
In order to address the above problem, the utility model provides a kind of multi-functional fish eye lens, can under being less than 2 object lens of large relative aperture prerequisite, F/no realize 185 degree ultra-large vision fields, realize 80% above relative exposure at 185 degree visual field places simultaneously, can export 300W pixel high definition picture element, keep infrared roughly the same with visible ray focal position simultaneously, realize confocal.
The multi-functional fish eye lens of above-mentioned one, comprise lens combination, it is characterized in that, described lens combination comprises first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens coaxial and that be arranged in order from object space to image space, between described the 4th lens and the 5th lens, is provided with diaphragm;
The focal length of described first lens, the second lens, the 3rd lens, the 5th lens is negative, and first lens, the second lens and the 3rd lens are meniscus shaped lens and bend towards image space;
The focal length of described the 4th lens, the 6th lens and the 7th lens is just;
Described lens combination meets the following conditions:
Described first lens meets: Nd>1.75, Vd >35;
Described the 4th lens meet: Nd>1.75, Vd >30;
Described the 5th lens meet: Nd>1.82;
Described the 6th lens meet: Vd >35;
Wherein, Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
In said apparatus, described the 4th lens are high index of refraction thick lens.
In said apparatus, described the 5th lens are glass of high refractive index lens.
In said apparatus, described first lens, the second lens and the 6th lens are low dispersion lens.
In said apparatus, described the 5th lens become gummed mirror with the 6th lens combination.
In said apparatus, the cemented surface of described gummed mirror bends towards image space.
In said apparatus, described lens combination also comprises optical filter.
In said apparatus, described optical filter is between the 7th lens and image space.
Advantage of the present utility model and beneficial effect are: the utility model provides a kind of multi-functional fish eye lens, by a lens combination that comprises 7 pieces of spheric glasses, can realize object lens of large relative aperture, high periphery light ratio, surpass 180 degree wide-angles, high resolving power, infrared confocal technical requirement, finally reach the object that has effectively reduced cost in improving performance.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is multi-functional fish-eye structural representation in the utility model;
Fig. 2 is multi-functional fish-eye MTF schematic diagram in the utility model;
Fig. 3 is multi-functional fish-eye axial chromatic aberration schematic diagram in the utility model;
Fig. 4 is multi-functional fish-eye curvature of the image figure in the utility model;
Fig. 5 is multi-functional fish-eye relative exposure figure in the utility model;
Fig. 6 is multi-functional fish-eye index path in the utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, the utility model has been recorded a kind of multi-functional fish eye lens, comprise lens combination, and this lens combination comprises first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th lens 7 coaxial and that be arranged in order from object space to image space, between described the 4th lens 4 and the 5th lens 5, is provided with diaphragm 9;
Wherein, in order to realize camera lens multifunction, lens combination need meet the following conditions:
First lens 1 is the meniscus shaped lens with negative focal length, and meets: Nd>1.75, Vd>35;
The second lens 2 are also the meniscus shaped lens for having negative focal length;
The 3rd lens 3 are also for having the meniscus shaped lens of negative focal length;
The focal length of the 4th lens 4 is being for just, and meets: Nd>1.75, Vd>30;
The focal length of the 5th lens 5 is negative, and meets: Nd>1.82;
The focal length of the 6th lens 6 is being for just, and meets: Vd>35;
The focal length of the 7th lens 7 is for just.
Wherein, Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
Preferably, the 4th lens 4 are high index of refraction thick lens, and the 5th lens 5 are glass of high refractive index lens, and the material of first lens 1, the second lens 2 and the 6th lens 6 all adopts low dispersion.
Further, the 5th lens 5 and the 6th lens 6 are together to form gummed mirror (not marking in the drawings), and the cemented surface of this gummed mirror bends towards image space.
Further, said lens group also comprises an optical filter 8, and this optical filter 8 is arranged between the 7th lens 7 and image space, chooses needed radiation wave band with this.
Below provide one group of data, a case as implementing:
| OBJ | Sphere | INF | Nd/Vd |
| 1 | 12.412 | 0.64 | 805897.4643 |
| 2 | 4.402 | 2.22 | |
| 3 | 13.2 | 0.5 | 732500.4962 |
| 4 | 3.43 | 1.99 | |
| 5 | 10.806 | 0.5 | 689160.5767 |
| 6 | 3.475 | 0.73 | |
| 7 | 8.096 | 3.15 | 922945.2083 |
| 8 | -12.922 | 1 | |
| Stop | INF | 0.87 | |
| 10 | 39.298 | 0.51 | 922945.2083 |
| 11 | 3.5 | 2.23 | 673000.5394 |
| 12 | -5.292 | 0.1 | |
| 13 | 7.792 | 1.62 | 658542.5345 |
| 14 | -12.775 | 4.65 | |
| IMG | INF | 0 |
Fig. 2 is multi-functional fish-eye MTF schematic diagram in the utility model; MTF(Modulation Transfer Function) be modulation transfer function, transverse axis representation space frequency in figure, unit: line is to every millimeter (lp/mm); The longitudinal axis represents the numerical value of modulation transfer function (MTF), and the numerical value of described MTF is used for evaluating the image quality of camera lens, and span is 0-1, and MTF curve is more high more directly represents that the image quality of camera lens is better, stronger to the reducing power of true picture.Fig. 2 comprises diffraction limit 21, axis 22,0.4 Field(40.00 °) time R line 23 and T line 24,1.0 Field(93.80 °) time R line 25 and T line 26; Picture element has obtained good correction as seen from Figure 2, can easily realize output performances more than 3,000,000 pixels.
Fig. 3 is multi-functional fish-eye axial chromatic aberration schematic diagram in the utility model; General Requirements lateral chromatic aberration is within the scope of Airy disk, and due to the undulatory property of light, light, by aperture, diffraction can occur, light and dark striped diffraction pattern, and fringe spacing becomes large with the minimizing of orifice size.Nearly 84% luminous energy concentrates on central bright spot, and all the other light energy distribution of 16% are on bright rings at different levels.There is maximum speck the central area of diffraction pattern, is called Airy disk.The diameter (d) of the angle of Airy disk and wavelength (λ) and aperture meets relation:
sinθ=1.22λ/d；
Wherein, θ is the diffraction direction angle (i.e. the subtended angle to optical center of lens from the center of central bright spot to first dark ring) of first dark ring, because θ angle is generally all very little, has sin θ ≈ θ, therefore θ ≈ 1.22 λ/d.
For optical imaging system, weigh the limit of imaging surface resolution with Airy disk diameter, Airy disk radius is r=1.22 λ f/d;
If lateral chromatic aberration is excessive, can find that on imaging surface, color is inhomogeneous.As can be seen from Figure 3, the lateral chromatic aberration major part of the light of different frequency is all within the scope of Aili spot, and imaging aberration is relatively even, and axial chromatic aberration has obtained good correction, can not focus and realize sharply defined image.
Fig. 4 is multi-functional fish-eye curvature of the image schematic diagram in the utility model; Distortion is an important performance characteristic of camera lens, distorts larger, and while taking straight line, this straight line is just more bending, if distortion exists an even multiple flex point, the straight line of seeing can become sinuate line, and this distortion is to be difficult to be accepted by people.Curvature of the image has obtained good correction as seen from Figure 3, although there is wide-angular field, full visual field picture element is comparatively even.
Fig. 5 is multi-functional fish-eye relative exposure figure in the utility model; Can keep more than 60% relative exposure in full visual field as shown in Figure 5, make image planes entirety evenly, avoid the darker shortcoming of some camera lens peripheries on the market.
Fig. 6 is multi-functional fish-eye index path in the utility model; As shown in Figure 6, from (choosing CMOS photo-sensitive cell in the present embodiment and carry out imaging, to can better control cost) in the central area that will focus on become image after superrefraction with the light of lens combination central shaft;
Light from other directions is focusing on respectively on photo-sensitive cell after superrefraction, wherein, the larger light of angle between incident angle and lens combination central shaft, its focus point is also the closer to the edge of become image, and the final image standing upside down that forms.
Further, the incident ray that incident angle and lens combination central shaft are vertical relation, its focus point is positioned at the edge of become image.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a multi-functional fish eye lens, comprise lens combination, it is characterized in that, described lens combination comprises first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens coaxial and that be arranged in order from object space to image space, between described the 4th lens and the 5th lens, is provided with diaphragm; The focal length of described first lens, the second lens, the 3rd lens, the 5th lens is negative, and first lens, the second lens and the 3rd lens are meniscus shaped lens and bend towards image space; The focal length of described the 4th lens, the 6th lens and the 7th lens is just;
Described lens combination meets the following conditions:
Described first lens meets: Nd>1.75, Vd >35;
Described the 4th lens meet: Nd>1.75, Vd >30;
Described the 5th lens meet: Nd>1.82;
Described the 6th lens meet: Vd >35;
Wherein, Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
2. the multi-functional fish eye lens of one as claimed in claim 1, is characterized in that, described the 4th lens are high index of refraction thick lens.
3. the multi-functional fish eye lens of one as claimed in claim 1, is characterized in that, described the 5th lens are glass of high refractive index lens.
4. the multi-functional fish eye lens of one as claimed in claim 1, is characterized in that, described first lens, the second lens and the 6th lens are low dispersion lens.
5. the multi-functional fish eye lens of one as claimed in claim 1, is characterized in that, described the 5th lens become gummed mirror with the 6th lens combination.
6. the multi-functional fish eye lens of one as claimed in claim 5, is characterized in that, the cemented surface of described gummed mirror bends towards image space.
7. the multi-functional fish eye lens of one as claimed in claim 1, is characterized in that, described lens combination also comprises optical filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149338.9U CN203773133U (en) | 2014-03-31 | 2014-03-31 | Multifunctional fish-eye lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149338.9U CN203773133U (en) | 2014-03-31 | 2014-03-31 | Multifunctional fish-eye lens |
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| Publication Number | Publication Date |
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| CN203773133U true CN203773133U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420149338.9U Expired - Lifetime CN203773133U (en) | 2014-03-31 | 2014-03-31 | Multifunctional fish-eye lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852862A (en) * | 2014-03-31 | 2014-06-11 | 嘉兴中润光学科技有限公司 | Multifunctional fish-eye lens |
| CN106094172A (en) * | 2016-08-25 | 2016-11-09 | 厦门爱劳德光电有限公司 | A kind of 5,000,000 pixel fish eye lenses |
| CN111474689A (en) * | 2020-06-23 | 2020-07-31 | 江西联创电子有限公司 | Wide-angle lens and panoramic camera system |
| CN114236758A (en) * | 2021-12-08 | 2022-03-25 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
-
2014
- 2014-03-31 CN CN201420149338.9U patent/CN203773133U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852862A (en) * | 2014-03-31 | 2014-06-11 | 嘉兴中润光学科技有限公司 | Multifunctional fish-eye lens |
| CN103852862B (en) * | 2014-03-31 | 2016-06-08 | 嘉兴中润光学科技有限公司 | A kind of multi-functional flake camera lens |
| CN106094172A (en) * | 2016-08-25 | 2016-11-09 | 厦门爱劳德光电有限公司 | A kind of 5,000,000 pixel fish eye lenses |
| CN111474689A (en) * | 2020-06-23 | 2020-07-31 | 江西联创电子有限公司 | Wide-angle lens and panoramic camera system |
| CN114236758A (en) * | 2021-12-08 | 2022-03-25 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN114236758B (en) * | 2021-12-08 | 2024-07-16 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Multifunctional fish-eye lens Effective date of registration: 20160725 Granted publication date: 20140813 Pledgee: Jiaxing SME Company limited by guarantee Pledgor: Jiaxing Zhongrun Optical Science and Technology Co., Ltd. Registration number: 2016330000050 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170814 Granted publication date: 20140813 Pledgee: Jiaxing SME Company limited by guarantee Pledgor: Jiaxing Zhongrun Optical Science and Technology Co., Ltd. Registration number: 2016330000050 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |