CN107577032A - Low distortion wide-angle lens - Google Patents
Low distortion wide-angle lens Download PDFInfo
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- CN107577032A CN107577032A CN201710845170.3A CN201710845170A CN107577032A CN 107577032 A CN107577032 A CN 107577032A CN 201710845170 A CN201710845170 A CN 201710845170A CN 107577032 A CN107577032 A CN 107577032A
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- 238000009738 saturating Methods 0.000 claims description 4
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Abstract
The present invention relates to a kind of low distortion wide-angle lens, including the first lens, the second lens, the 3rd lens, diaphragm, the 4th lens, the 5th lens, the 6th lens and the 7th lens being arranged in order along optical axis from thing side to image side；First lens, second lens, the 4th lens and the 7th lens are negative-power lenses；3rd lens, the 5th lens and the 6th lens are positive power lens；4th lens and the 5th lens form cemented doublet group；First lens and second lens bend towards the diaphragm.The big angle of visual field and low distortion performance are had according to the low distortion wide-angle lens of the present invention.
Description
Technical field
The present invention relates to a kind of optical lens, more particularly to a kind of low distortion wide-angle lens.
Background technology
Wide-angle lens is widely used in safety monitoring, vehicle-mounted recording, real-time video etc..It is right with the expansion of application field
The combination property of wide-angle lens proposes higher requirement, the wide-angle lens that security protection uses must in the case of without focusing,
Realize that visible ray and infrared light focal position are essentially identical；Wide-angle lens on Train-borne recorder, then must assure that in low temperature or
Resolving power is not varied with temperature and drifted about under person's high temperature；And real-time video wide-angle lens must while the big angle of visual field is met,
Ensure low distortion.
Wide-angle lens common at present is usually to be made up of 6-10 lens, such as Patent No. " A of CN 101930111 "
Chinese patent shown in, the camera lens uses 5 group of 6 chip all-glass construction so that camera lens heavier-weight, optics overall length is longer, no
The requirement of miniaturization can be met, and full glass lens cost is higher does not have the market advantage.And the aperture of the wide-angle lens is
2.4, F-number is bigger in theory, and the luminous flux into optical system is fewer, causes the brightness at image planes edge dark, greatly drop
The low definition of image planes.For another example the Chinese patent of Patent No. " B of CN 103499874 " wide-angle lens, by 6 lens groups
Into using traditional sphere technology, all lens are spherical lens, thus can not effectively control distortion.
The content of the invention
It is an object of the present invention to provide a kind of camera lens with the big angle of visual field and low distortion performance.
To achieve the above object, the present invention provides a kind of low distortion wide-angle lens, including：Along optical axis from thing side to image side according to
First lens of secondary arrangement, the second lens, the 3rd lens, diaphragm, the 4th lens, the 5th lens, the 6th lens and the 7th are saturating
Mirror；
First lens, second lens, the 4th lens and the 7th lens are negative-power lenses；
3rd lens, the 5th lens and the 6th lens are positive power lens；
4th lens and the 5th lens form cemented doublet group；
First lens and second lens bend towards the diaphragm.
According to an aspect of the present invention, the angle of visual field FOV scopes of the camera lens are：100°≤FOV≤108°.
According to an aspect of the present invention, the effective focal length f and Entry pupil diameters D of the camera lens meet relational expression：F/D ＜
2.0。
According to an aspect of the present invention, the angle of visual field FOV of the camera lens and effective focal length f of the camera lens meets relation
Formula：| tan (FOV/2)/f | ＞ 0.18.
According to one of present invention aspect, the thing flank radius of first lens is R1-1, image side curvature radius
For R1-2, effective focal length f1, radius of curvature R1-1, radius of curvature R1-2And effective focal length f1 meets relational expression：(R1-2/R1-1)-1/
F1 ＞ 0.26.
According to an aspect of the present invention, the thing flank radius of second lens is R2-1, image side curvature radius
For R2-2, effective focal length f2, radius of curvature R2-1, radius of curvature R2-2And effective focal length f2 meets relational expression：(R2-2/R2-1)-1/
F2 ＞ 0.13.
According to an aspect of the present invention, the effective focal length f of the effective focal length f1 of first lens and the camera lens it
Between meet relational expression：- 3.02 ＜ f1/f ＜ -2.18.
According to an aspect of the present invention, the effective focal length f of the effective focal length f2 of second lens and the camera lens it
Between meet relational expression：- 3.40 ＜ f2/f ＜ -2.23.
According to an aspect of the present invention, the effective focal length f of the effective focal length f3 of the 3rd lens and the camera lens it
Between meet relational expression：2.20 ＜ f3/f ＜ 5.17.
According to an aspect of the present invention, the rise at the greatest optical effective diameter on the thing side of first lens
The center thickness d1 of rise SAG2 and first lens meets to close respectively at greatest optical effective diameter on SAG1 and image side surface
It is formula：The ＜ SAG2/d1 ＜ 3.62 of 0.85 ＜ SAG1/d1 ＜ 2.57,1.85.
According to an aspect of the present invention, the camera lens also includes the optical filter positioned at the 7th lens image side and protection
Glass, and the imaging surface positioned at the optical system end of the optical lens.
The thing center side of first lens is to the distance T1 of the diaphragm and the thing center side of first lens
Distance TTL to the imaging surface meets relational expression：0.31 ＜ T1/TTL ＜ 0.56.
The image side surface center of 7th lens is to the distance T2 of the diaphragm and the thing center side of first lens
Distance TTL to the imaging surface of the camera lens meets relational expression：0.22 ＜ T2/TTL ＜ 0.49.
The image side surface center of 7th camera lens to imaging surface distance BFL and the camera lens effective focal length f between it is full
Sufficient relational expression formula：BFL/f ＞ 1.26.
According to an aspect of the present invention, the refractive index nd4 and Abbe number vd4 of the 4th lens span difference
For：1.52 ＜ nd4 ＜ 1.8；Vd4 ＜ 39.
According to an aspect of the present invention, the refractive index nd5 and Abbe number vd5 of the 5th lens span difference
For：1.40 ＜ nd5 ＜ 1.67；Vd5 ＞ 60.
According to an aspect of the present invention, second lens, the 3rd lens and the 7th lens are plastics
Non-spherical lens.
First lens, the 4th lens, the 5th lens and the 6th lens are the sphere of glass material
Lens；
According to the low distortion wide-angle lens of the present invention, using the above-mentioned setting of seven lens so that camera lens has big regard
Rink corner.First lens and the second lens are the falcate structure for bending towards diaphragm, can effectively control the first lens and the second lens
Relative aperture size, so as to reduce height of incidence when chief ray enters optical system, and then reduce optical system
The purpose of aberration rate.
According to the low distortion wide-angle lens of the present invention, the effective focal length and mirror of the first lens, the second lens and the 3rd lens
The effective focal length of head meets above-mentioned qualified relation, is advantageous to the first lens, the second lens and the 3rd before reasonable distribution diaphragm
Power of lens, can in the case where meeting optical system effective focal length, reduce chief ray the first lens, the second lens and
Incident angle on each optical surface of 3rd lens, be advantageous to correct the aberration of the outer visual field of axle.
According to the low distortion wide-angle lens of the present invention, the angle of visual field FOV of camera lens is 100 degree to 108 degree, effective Jiao of camera lens
Entry pupil diameters D away from f and camera lens meets relational expression：F/D ＜ 2.2, belong to large aperture wide-angle lens, overcome general wide-angle lens
The defects of existing imaging surface edge dimness, ensure the thang-kng amount in optical system, so as to ensure that it is enough that imaging surface edge has
Brightness, improve the definition of imaging.
According to the low distortion wide-angle lens of the present invention, the first lens, the 4th lens, the 5th lens and the 6th lens use glass
The spherical lens of glass material, the second lens, the 3rd lens and the 7th lens use plastic aspheric lens.Compared to whole uses
The lens of glass material, while effective aberration correction and control distortion, the overall weight of camera lens can be mitigated, shorten camera lens
Overall length, reduce the volume of camera lens.Being used cooperatively by using glass lens and plastic lens simultaneously, in effective control distortion
While, because glass material and plastic material have the function that to compensate mutually, the resolving power of camera lens can be efficiently solved with temperature
Degree produce drift the problem of, realize optical system without thermalization.
Brief description of the drawings
Fig. 1 is the structure for schematically showing the low distortion wide-angle lens according to one embodiment of the present invention/embodiment 1
Layout drawing；
Fig. 2 is the distortion curve figure for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 1；
Fig. 3 is to schematically show that according to embodiments of the present invention 1 the burnt of low distortion wide-angle lens moves curve map；
Fig. 4 is the structural plan for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 2；
Fig. 5 is the distortion curve figure for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 2；
Fig. 6 is to schematically show that according to embodiments of the present invention 2 the burnt of low distortion wide-angle lens moves curve map；
Fig. 7 is the structural plan for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 3；
Fig. 8 is the distortion curve figure for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 3；
Fig. 9 is to schematically show that according to embodiments of the present invention 3 the burnt of low distortion wide-angle lens moves curve map；
Figure 10 is the structural plan for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 4；
Figure 11 is the distortion curve figure for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 4；
Figure 12 is to schematically show that according to embodiments of the present invention 4 the burnt of low distortion wide-angle lens moves curve map.
Embodiment
, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical scheme of the prior art
In the required accompanying drawing used be briefly described.It should be evident that drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skills, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ",
" rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation expressed by " outer " or position relationship are to be based on phase
Orientation shown in the drawings or position relationship are closed, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore above-mentioned term can not
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment can not go to live in the household of one's in-laws on getting married one by one herein
State, but therefore embodiments of the present invention are not defined in implementation below.
Fig. 1 schematically shows the structural plan of the low distortion wide-angle lens according to the present invention.As shown in figure 1, according to this
The low distortion wide-angle lens of invention includes the first lens 1, the second lens the 2, the 3rd being arranged in order along optical axis from thing side to image side
Lens 3, diaphragm S, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, optical filter and protective glass and imaging
Face.In the present invention, the first lens 1, the second lens 2, the 4th lens 4 and the 7th lens 7 are the lens with negative power.The
Three lens 3, the 5th lens 5 and the 6th lens 6 are the lens with positive light coke.In the present invention, it is saturating to be arranged on the 3rd by diaphragm S
Between the lens 4 of mirror 3 and the 4th, the 4th lens 4 and the 5th lens 5 form cemented doublet group.First lens 1 and the second lens 2 are equal
To bend towards diaphragm S falcate structure.
According to the above-mentioned low distortion wide-angle lens of the present invention, using the above-mentioned setting of seven lens so that camera lens has big
The angle of visual field.In the camera lens of the present invention, the first lens 1 and the second lens 2 are the falcate structure for bending towards diaphragm S, can be had
The relative aperture size of effect the first lens 1 of control and the second lens 2, so as to reduce incidence when chief ray enters optical system
Highly, and then reduce optical system aberration rate purpose.
According to the low distortion wide-angle lens of the present invention, the angle of visual field FOV scopes of camera lens are：100°≤FOV≤108°.So
When angle of visual field FOV is when between 100 degree to 108 degree, the requirement of low distortion can be met according to the camera lens of the present invention.In addition,
The effective focal length of camera lens is f, and the Entry pupil diameters of camera lens are that D, the effective focal length f of camera lens and the Entry pupil diameters D of camera lens meet relation
Formula：F/D ＜ 2.0.The benefit so set is：Ensure thang-kng amount in optical system, so as to ensure that it is enough that imaging surface edge has
Brightness, the defects of overcoming imaging surface edge dimness existing for general wide-angle lens, improve the definition of imaging.In this implementation
In mode, meet relational expression according between the angle of visual field FOV of low distortion wide-angle lens and the effective focal length f of camera lens of the present invention：|
Tan (FOV/2)/f | ＞ 0.18.Meet that above-mentioned relation can ensure camera lens on the premise of with the big angle of visual field, effective control
The amount of distortion of optical system, realize wide-angle, the purpose of low distortion.
According to the low distortion wide-angle lens of the present invention, the thing flank radius of the first lens 1 is R1-1, the song of image side surface
Rate radius is R1-2.The thing flank radius of second lens 2 is R2-1, image side curvature radius is R2-2.First lens 1 have
Effect focal length is f1, and the effective focal length of the second lens 2 is f2, and the effective focal length of the 3rd lens 3 is f3.In the present invention, first is saturating
The thing flank radius R of mirror 11-1, image side surface radius of curvature R1-2Meet relational expression with effective focal length f1：(R1-2/R1-1)-1/f1
＞ 0.26.The thing flank radius R of second lens 22-1, image side surface radius of curvature R2-2Meet relational expression with effective focal length f2：
(R2-2/R2-1) -1/f2 ＞ 0.13.The effective focal length f1 of first lens 1, the effective focal length f2 of the second lens 2 and the 3rd lens 3
Meet relational expression respectively between the effective focal length f of effective focal length f3 and the camera lens of the present invention：- 3.02 ＜ f1/f ＜ -2.18, -
3.40 ＜ f2/f ＜ -2.23 and 2.20 ＜ f3/f ＜ 5.17.
According to the present invention low distortion wide-angle lens, the effective focal length of the first lens 1, the second lens 2 and the 3rd lens 3 with
The effective focal length of camera lens meets above-mentioned qualified relation, is advantageous to the first lens 1, the and of the second lens 2 before reasonable distribution diaphragm S
The focal power of 3rd lens 3, chief ray can be reduced in the first lens 1, second in the case where meeting optical system effective focal length
Incident angle on each optical surface of the lens 3 of lens 2 and the 3rd, be advantageous to correct the aberration of the outer visual field of axle.
In the present invention, the rise at the greatest optical effective diameter on the thing side of the first lens 1 is SAG1, and image side surface is most
Rise at big optics effective diameter is SAG2, and the center thickness of the first lens 1 is d1.The thing side of first lens 1 and image side surface
Meet relational expression respectively between rise and center thickness at greatest optical effective diameter：0.85 ＜ SAG1/d1 ＜ 2.57 and 1.85
＜ SAG2/d1 ＜ 3.62.Being arranged such can overcome first lens existing for general wide-angle lens excessively to bend not easy processing
The defects of, effectively improve the anufacturabilities of the first lens 1.
According to the low distortion wide-angle lens of the present invention, as shown in figure 1, in the present embodiment, the thing side of the first lens 1
Center is T1 to diaphragm S distance, and the distance of the thing center side of the first lens 1 to imaging surface is TTL.The image side of 7th lens 7
Face center is T2 to diaphragm S distance, and the distance at the image side surface center of the 7th lens 7 to imaging surface is BFL.The thing of first lens 1
Center side to diaphragm S distance T1 and the thing center side of the first lens 1 meet relational expression between the distance TTL of imaging surface：
0.31 ＜ T1/TTL ＜ 0.56.The image side surface center of 7th lens 7 is arrived to diaphragm S distance T2 with the thing center side of the first lens 1
Meet relational expression between the distance TTL of imaging surface：0.22 ＜ T2/TTL ＜ 0.49.The image side surface center of 7th lens 7 is to imaging surface
Distance BFL and the effective focal length of camera lens meet relational expression：BFL/f ＞ 1.26.Be arranged such ensure optical system overall length compared with
In the case of small, the spacing between each lens can be effectively balanced so that incidence of the chief ray on each optical surface
Angle has reduced, and improves the sensitiveness of optical system.
As shown in figure 1, in the present embodiment, the 4th lens 4 and the 5th lens 5 form cemented doublet group.4th lens 4
Refractive index be nd4, Abbe number vd4, and meet relational expression：1.52 ＜ nd4 ＜ 1.8 and vd4 ＜ 39.5th lens 5
Refractive index is nd5, Abbe number vd5, and meets the ＜ nd5 ＜ 1.67 and vd5 ＞ 60 of relational expression 1.40.4th lens 4 and
Five lens 5 are coordinated according to this refractive index, it is ensured that camera lens equal energy blur-free imaging in the environment of visible ray and infrared light, can
Realize day and night function.The difference of the Abbe number of the 4th lens 4 and the 5th lens 5 is more than 20 simultaneously, is advantageous to correct optical system
The aberration of system.
According to one embodiment of the present invention, the second lens 2, the 3rd lens 3 and the 7th lens 7 use plastic aspherical element
Lens, other lenses can use the spherical lens of glass material.Compared to all using the lens of glass material, in effective school
While positive aberration and control distortion, the overall weight of camera lens can be mitigated, shorten the overall length of camera lens.
According to another embodiment of the invention, the first lens 1, the 4th lens 4, the 5th lens 5 and the 6th lens 6 are adopted
With the spherical lens of glass material, the second lens 2, the 3rd lens 3 and the 7th lens 7 use plastic aspheric lens.By adopting
With being used cooperatively for glass lens and plastic lens, while effective control distortion, because glass material and plastic material have
Play the role of to compensate mutually, the resolving power that can efficiently solve camera lens produces the problem of drifting about with temperature, realizes optical system
Without thermalization.
It is the changes in material of each lens in the low distortion wide-angle lens according to the invention described above and each phase below
The difference of related parameter provides four groups of embodiments and illustrated according to low distortion wide-angle lens of the invention.According to the low abnormal of the present invention
Become wide-angle lens, including seven lens, and the 4th lens 4 and the 5th lens 5 form cemented doublet group, so seven lens are total to
There are 13 faces.In addition, camera lens is also including the diaphragm S between the 3rd lens 3 and the 4th lens 4, positioned at the image side of the 7th lens 7
Optical filter and protective glass and imaging surface, so according to the present invention low distortion wide-angle lens share 16 faces, this 16
Face is arranged in order arrangement according to the lens order of the present invention, is S1-S16 by this 16 face numberings for the ease of narration.
Data in data such as table 1 below in four groups of embodiments：
Table 1
Embodiment 1：
Fig. 1 schematically shows the structural plan of 1 low distortion wide-angle lens according to an embodiment of the invention.
According to an embodiment of the invention 1, the effective focal length f of low distortion wide-angle lens is 2.99mm, the angle of visual field FOV of camera lens
For 100 °, the distance of the thing center side of the first lens 1 to imaging surface is 22.97mm.As shown in Table 1, each ginseng in embodiment 1
The numerical value that number is belonged in above-mentioned each parameter area, meet the limit for each parameter according to low distortion wide-angle lens of the invention
It is fixed.
Table 2 below lists the relevant parameter for meeting each lens according to each parameter area of the present invention, including surface type,
Radius of curvature, thickness, the refractive index of material and Abbe number：
Table 2
Table 3 below lists the asphericity coefficient of the second lens 2, the 3rd lens 3 and the 7th lens 7：
| Surface | A4 | A6 | A8 | A10 | A12 |
| S3 | 2.0198E-003 | -5.925E-004 | 5.1795E-005 | -1.868E-06 | 0 |
| S4 | 0.0193 | -3.346E-003 | 3.6189E-004 | -2.507E-005 | 6.8061E-007 |
| S5 | 1.4890E-003 | 1.8863E-004 | 6.8905E-006 | 2.8691E-006 | 2.8691E-007 |
| S6 | 3.8772E-03 | 3.9497E-004 | 2.9226E-006 | -5.486E-007 | 9.8078E-007 |
| S13 | 1.0068E-003 | -1.455E-004 | -1.659E-005 | 3.4509E-006 | -2.801E-007 |
| S14 | 3.8725E-003 | -3.974E-005 | -2.574E-005 | 8.7857E-006 | -8.530E-007 |
Table 3
Fig. 2 and Fig. 3 is distortion curve figure and Jiao for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 1
Move curve map.As can be seen from Figure, the camera lens of the present embodiment is in the case where angle of visual field FOV is 100 °, the aberration rate of camera lens
Within -20.00%, the defocus (field depth of camera lens) of camera lens is controlled in the range of -0.006mm to 0,006mm for control,
For camera lens in zero burnt pan position, OTF coefficients are more than 0.5.As can be seen here, according to embodiments of the present invention 1 low distortion wide-angle lens,
In the case of with the big angle of visual field, the defocus of camera lens is smaller, is effectively guaranteed the high resolution of camera lens.Camera lens is abnormal simultaneously
Variability is relatively low, ensure that camera lens image planes are clear, undistorted.
Embodiment 2：
Fig. 4 schematically shows the structural plan of 2 low distortion wide-angle lens according to an embodiment of the invention.
According to an embodiment of the invention 2, the effective focal length f of low distortion wide-angle lens are 2.988mm, the angle of visual field of camera lens
FOV is 104 °, and the distance of the thing center side of the first lens 1 to imaging surface is 21.79mm.As shown in Table 1, it is each in embodiment 2
The numerical value that individual parameter is belonged in above-mentioned each parameter area, meet the low distortion wide-angle lens according to the present invention for each parameter
Limit.
Table 4 below lists the relevant parameter for meeting each lens according to each parameter area of the present invention, including surface type,
Radius of curvature, thickness, the refractive index of material and Abbe number：
Table 4
Table 5 below lists the asphericity coefficient of the second lens 2, the 3rd lens 3 and the 7th lens 7：
| Surface | A4 | A6 | A8 | A10 | A12 |
| S3 | 2.5707E-003 | -5.425E-004 | 4.9651E-005 | -1.544E-006 | 0 |
| S4 | 0.0194 | -3.359E-003 | 3.7415E-004 | -2.192E-005 | 3.9769E-007 |
| S5 | 3.9363E-003 | 5.4674E-005 | -8.837E-006 | 3.7001E-006 | -2.017E-007 |
| S6 | 6.1781E-003 | 1.3989E-004 | 2.7562E-005 | 3.7977E-006 | 1.3614E-007 |
| S13 | 5.6711E-004 | -2.244E-004 | -2.303E-005 | 5.7196E-006 | -2.903E-007 |
| S14 | 4.2859E-003 | -2.207E-004 | -9.157E-006 | 6.7385E-006 | -5.883E-007 |
Table 5
Fig. 5 and Fig. 6 is distortion curve figure and Jiao for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 2
Move curve map.As can be seen from Figure, camera lens is in the case where angle of visual field FOV is 104 °, the control of the aberration rate of camera lens-
Within 20.00%, the defocus (field depth of camera lens) of camera lens is controlled in the range of -0.006mm to 0.006mm, burnt zero
During pan position, OTF coefficients are more than 0.5.As can be seen here, according to embodiments of the present invention 2 low distortion wide-angle lens, with regarding greatly
In the case of rink corner, the defocus of camera lens is smaller, is effectively guaranteed the high resolution of camera lens.The aberration rate of camera lens is relatively low simultaneously,
It ensure that camera lens image planes are clear, undistorted.
Embodiment 3：
Fig. 7 schematically shows the structural plan of 3 low distortion wide-angle lens according to an embodiment of the invention.
According to an embodiment of the invention 3, the effective focal length f of low distortion wide-angle lens is 3.07mm, the angle of visual field FOV of camera lens
For 106 °, the distance of the thing center side of the first lens 1 to imaging surface is 22.04mm.As shown in Table 1, each ginseng in embodiment 3
The numerical value that number is belonged in above-mentioned each parameter area, meet the limit for each parameter according to low distortion wide-angle lens of the invention
It is fixed.
Table 6 below lists the relevant parameter for meeting each lens according to each parameter area of the present invention, including surface type,
Radius of curvature, thickness, the refractive index of material and Abbe number：
Table 6
Table 7 below lists the asphericity coefficient of the second lens 2, the 3rd lens 3 and the 7th lens 7：
| Surface | A4 | A6 | A8 | A10 | A12 |
| S3 | 3.9477E-003 | -6.958E-004 | 5.3356E-005 | -2.421E-006 | 2.2133E-008 |
| S4 | 0.0224 | -3.154E-003 | 3.6142E-004 | -2.791E-005 | 8.0473E-007 |
| S5 | 1.4871E-003 | 1.9923E-004 | 1.9607E-005 | -2.580E-006 | 2.8641E-007 |
| S6 | 3.7660E-003 | 3.3314E-004 | 2.5488E-005 | 2.7704E-006 | 5.4260E-007 |
| S13 | 4.1920E-004 | -4.811E-005 | 1.0369E-006 | 1.0369E-006 | 3.9184E-008 |
| S14 | 4.6025E-003 | 1.7806E-004 | 9.9748E-006 | 9.9748E-006 | -7.039E-007 |
Table 7
Fig. 8 and Fig. 9 is distortion curve figure and Jiao for the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 3
Move curve map.As can be seen from Figure, camera lens is in the case where angle of visual field FOV is 106 °, the control of the aberration rate of camera lens-
Within 20.00%, the defocus (field depth of camera lens) of camera lens is controlled in the range of -0.006mm to 0.006mm, and camera lens exists
During zero burnt pan position, OTF coefficients are more than 0.5.As can be seen here, according to embodiments of the present invention 3 low distortion wide-angle lens, with
In the case of the big angle of visual field, low distortion and high-resolution requirement disclosure satisfy that.
Embodiment 4：
Figure 10 schematically shows the structural plan of 4 low distortion wide-angle lens according to an embodiment of the invention.
According to an embodiment of the invention 4, the effective focal length f of low distortion wide-angle lens is 3.35mm, the angle of visual field FOV of camera lens
For 108 °, the distance of the thing center side of the first lens 1 to imaging surface is 22.91mm.As shown in Table 1, each ginseng in embodiment 4
The numerical value that number is belonged in above-mentioned each parameter area, meet the limit for each parameter according to low distortion wide-angle lens of the invention
It is fixed.
Table 8 below lists the relevant parameter for meeting each lens according to each parameter area of the present invention, including surface type,
Radius of curvature, thickness, the refractive index of material and Abbe number：
Table 8
Table 9 below lists the asphericity coefficient of the second lens 2, the 3rd lens 3 and the 7th lens 7：
| Surface | A4 | A6 | A8 | A10 | A12 |
| S3 | 3.1333E-003 | -6.422E-004 | 5.7163E-005 | -2.163E-006 | -3.114E-010 |
| S4 | 0.0217 | -3.325E-003 | 3.5501E-004 | -1.939E-005 | 9.5206E-008 |
| S5 | 1.4190E-003 | 9.8757E-005 | 2.1624E-005 | 4.5770E-007 | 1.9443E-007 |
| S6 | 3.0566E-003 | 1.8097E-004 | 2.1571E-005 | 4.6881E-006 | 5.7872E-007 |
| S13 | 1.3636E-003 | -7.647E-005 | -2.265E-005 | 1.7638E-006 | 1.9375E-008 |
| S14 | 4.0066E-003 | 9.9979E-005 | -5.627E-005 | 8.006E-006 | -3.119E-007 |
Table 9
Figure 11 and Figure 12 be the low distortion wide-angle lens for schematically showing according to embodiments of the present invention 4 distortion curve figure and
Jiao moves curve map.As can be seen from Figure, camera lens is in the case where angle of visual field FOV is 108 °, the control of the aberration rate of camera lens-
Within 20.00%, the defocus (field depth of camera lens) of camera lens is controlled in the range of -0.006mm to 0.006mm, and camera lens exists
During zero burnt pan position, OTF coefficients are more than 0.5.As can be seen here, according to embodiments of the present invention 4 low distortion wide-angle lens, with
In the case of the big angle of visual field, low distortion and high-resolution requirement disclosure satisfy that.
From the foregoing, it will be observed that the low distortion wide-angle lens of embodiments of the invention 1- embodiments 4 can realize that identical technology is imitated
Fruit, that is, possesses the characteristic such as the big angle of visual field, low distortion, high-resolution, large aperture and resolving power height.Meanwhile according to the low of the present invention
Wide-angle lens distort because the setting of said lens material, also make it that its weight is lighter, volume is smaller and cost is lower.
The above is only enumerating for the concrete scheme of the present invention, should for the equipment and structure of wherein not detailed description
When being interpreted as taking the existing common apparatus in this area and universal method to be practiced.
The scheme of the present invention is the foregoing is only, is not intended to limit the invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (17)
- A kind of 1. low distortion wide-angle lens, it is characterised in that including：The first lens being arranged in order along optical axis from thing side to image side (1), the second lens (2), the 3rd lens (3), diaphragm (S), the 4th lens (4), the 5th lens (5), the 6th lens (6) and Seven lens (7)；First lens (1), second lens (2), the 4th lens (4) and the 7th lens (7) are negative light Power lenses；3rd lens (3), the 5th lens (5) and the 6th lens (6) are positive power lens；4th lens (4) and the 5th lens (5) form cemented doublet group；First lens (1) and second lens (2) bend towards the diaphragm (S).
- 2. low distortion wide-angle lens according to claim 1, it is characterised in that the angle of visual field FOV scopes of the camera lens are： 100°≤FOV≤108°。
- 3. low distortion wide-angle lens according to claim 1, it is characterised in that the effective focal length f and entrance pupil of the camera lens Diameter D meets relational expression：F/D ＜ 2.0.
- 4. low distortion wide-angle lens according to claim 1, it is characterised in that the angle of visual field FOV of the camera lens with it is described The effective focal length f of camera lens meets relational expression：| tan (FOV/2)/f | ＞ 0.18.
- 5. low distortion wide-angle lens according to claim 1, it is characterised in that the thing side of first lens (1) is bent Rate radius is R1-1, image side curvature radius is R1-2, effective focal length f1, radius of curvature R1-1, radius of curvature R1-2It is and effectively burnt Meet relational expression away from f1：(R1-2/R1-1) -1/f1 ＞ 0.26.
- 6. low distortion wide-angle lens according to claim 1, it is characterised in that the thing side of second lens (2) is bent Rate radius is R2-1, image side curvature radius is R2-2, effective focal length f2, radius of curvature R2-1, radius of curvature R2-2It is and effectively burnt Meet relational expression away from f2：(R2-2/R2-1) -1/f2 ＞ 0.13.
- 7. low distortion wide-angle lens according to claim 1, it is characterised in that the effective focal length of first lens (1) Meet relational expression between f1 and the effective focal length f of the camera lens：- 3.02 ＜ f1/f ＜ -2.18.
- 8. low distortion wide-angle lens according to claim 1, it is characterised in that the effective focal length of second lens (2) Meet relational expression between f2 and the effective focal length f of the camera lens：- 3.40 ＜ f2/f ＜ -2.23.
- 9. low distortion wide-angle lens according to claim 1, it is characterised in that the effective focal length of the 3rd lens (3) Meet relational expression between f3 and the effective focal length f of the camera lens：2.20 ＜ f3/f ＜ 5.17.
- 10. low distortion wide-angle lens according to claim 1, it is characterised in that on the thing side of first lens (1) Greatest optical effective diameter at rise SAG1 and image side surface on greatest optical effective diameter at rise SAG2 and described first it is saturating The center thickness d1 of mirror (1) meets relational expression respectively：The ＜ SAG2/d1 ＜ 3.62 of 0.85 ＜ SAG1/d1 ＜ 2.57,1.85.
- A 11. low distortion wide-angle lens according to claim 1, it is characterised in that the camera lens is also included positioned at described The optical filter and protective glass of the 7th lens (7) image side, and the imaging surface positioned at the optical system end of the optical lens.
- 12. the thing center side of first lens (1) is to the distance T1 of the diaphragm (S) and the thing of first lens (1) The distance TTL of center side to the imaging surface meets relational expression：0.31 ＜ T1/TTL ＜ 0.56.
- 13. the image side surface center of the 7th lens (7) is to the distance T2 of the diaphragm (S) and the thing of first lens (1) The distance TTL of center side to the imaging surface of the camera lens meets relational expression：0.22 ＜ T2/TTL ＜ 0.49.
- 14. the image side surface center of the 7th lens (7) to imaging surface distance BFL and the camera lens effective focal length f between Meet relational expression：BFL/f ＞ 1.26.
- 15. low distortion wide-angle lens according to claim 1, it is characterised in that the refractive index of the 4th lens (4) Nd4 and Abbe number vd4 span is respectively：1.52 ＜ nd4 ＜ 1.8；Vd4 ＜ 39.
- 16. low distortion wide-angle lens according to claim 15, it is characterised in that the refractive index of the 5th lens (5) Nd5 and Abbe number vd5 span is respectively：1.40 ＜ nd5 ＜ 1.67；Vd5 ＞ 60.
- 17. low distortion wide-angle lens according to claim 1, it is characterised in that second lens (2), the described 3rd Lens (3) and the 7th lens (7) are plastic aspheric lens.First lens (1), the 4th lens (4), the 5th lens (5) and the 6th lens (6) are glass material The spherical lens of matter.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900734A (en) * | 2018-07-16 | 2018-11-27 | 杭州电子科技大学 | A kind of wide-angle lens automatic distortion correction device and method |
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| CN110072045A (en) * | 2019-05-30 | 2019-07-30 | Oppo广东移动通信有限公司 | Camera lens, camera and electronic equipment |
| WO2021128141A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| CN114137691A (en) * | 2021-10-26 | 2022-03-04 | 福建福光股份有限公司 | Day and night shared optical lens group |
| WO2022082761A1 (en) * | 2020-10-23 | 2022-04-28 | 欧菲光集团股份有限公司 | Optical system, lens module, and electronic device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05323183A (en) * | 1992-05-26 | 1993-12-07 | Konica Corp | Super wide-angle lens |
| US20130141629A1 (en) * | 2010-08-25 | 2013-06-06 | Panasonic Corporation | Single focal length lens system, interchangeable lens apparatus and camera system |
| CN105974561A (en) * | 2016-07-08 | 2016-09-28 | 浙江舜宇光学有限公司 | Wide-angle image photographing lens |
| CN106772946A (en) * | 2017-01-22 | 2017-05-31 | 东莞市宇瞳光学科技股份有限公司 | Small-sized glass modeling mixing is without thermalization tight shot |
| CN207502801U (en) * | 2017-09-19 | 2018-06-15 | 舜宇光学(中山)有限公司 | Low distortion wide-angle lens |
-
2017
- 2017-09-19 CN CN201710845170.3A patent/CN107577032B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05323183A (en) * | 1992-05-26 | 1993-12-07 | Konica Corp | Super wide-angle lens |
| US20130141629A1 (en) * | 2010-08-25 | 2013-06-06 | Panasonic Corporation | Single focal length lens system, interchangeable lens apparatus and camera system |
| CN105974561A (en) * | 2016-07-08 | 2016-09-28 | 浙江舜宇光学有限公司 | Wide-angle image photographing lens |
| CN106772946A (en) * | 2017-01-22 | 2017-05-31 | 东莞市宇瞳光学科技股份有限公司 | Small-sized glass modeling mixing is without thermalization tight shot |
| CN207502801U (en) * | 2017-09-19 | 2018-06-15 | 舜宇光学(中山)有限公司 | Low distortion wide-angle lens |
Cited By (15)
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|---|---|---|---|---|
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| CN108900734A (en) * | 2018-07-16 | 2018-11-27 | 杭州电子科技大学 | A kind of wide-angle lens automatic distortion correction device and method |
| US11405538B2 (en) | 2018-10-16 | 2022-08-02 | Huawei Technologies Co., Ltd. | Macro imaging method and terminal |
| CN109788089B (en) * | 2018-10-16 | 2021-05-18 | 华为技术有限公司 | Microspur imaging method and terminal |
| CN109788089A (en) * | 2018-10-16 | 2019-05-21 | 华为技术有限公司 | The method and terminal of microspur imaging |
| US11683574B2 (en) | 2018-10-16 | 2023-06-20 | Huawei Technologies Co., Ltd. | Macro imaging method and terminal |
| CN110072045A (en) * | 2019-05-30 | 2019-07-30 | Oppo广东移动通信有限公司 | Camera lens, camera and electronic equipment |
| CN110072045B (en) * | 2019-05-30 | 2021-11-09 | Oppo广东移动通信有限公司 | Lens, camera and electronic equipment |
| WO2021128141A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| WO2022082761A1 (en) * | 2020-10-23 | 2022-04-28 | 欧菲光集团股份有限公司 | Optical system, lens module, and electronic device |
| CN114137691A (en) * | 2021-10-26 | 2022-03-04 | 福建福光股份有限公司 | Day and night shared optical lens group |
| CN114911035A (en) * | 2022-05-06 | 2022-08-16 | 福建福光天瞳光学有限公司 | Low-dispersion high-definition lens |
| CN114911035B (en) * | 2022-05-06 | 2024-01-12 | 福建福光天瞳光学有限公司 | Low-dispersion high-definition lens |
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