CN206657132U - A kind of aspherical fish eye lens - Google Patents

A kind of aspherical fish eye lens Download PDF

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Publication number
CN206657132U
CN206657132U CN201720346066.5U CN201720346066U CN206657132U CN 206657132 U CN206657132 U CN 206657132U CN 201720346066 U CN201720346066 U CN 201720346066U CN 206657132 U CN206657132 U CN 206657132U
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Prior art keywords
lens
optical surface
aspherical
circular cone
conic coefficient
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Inventor
张鸿佳
梁伟朝
贺保丁
白兴安
高屹东
付湘发
蓝岚
周静
张德伦
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Sunny Optics Zhongshan Co Ltd
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Sunny Optics Zhongshan Co Ltd
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Abstract

A kind of aspherical fish eye lens, the 4th lens, the 5th lens of positive light coke and the 6th lens of negative power of the first lens of positive light coke, the second lens of negative power, the 3rd lens of positive light coke, positive light coke are disposed with along light incident direction, first lens, the second lens, the 3rd lens form preceding group of lens of negative power, 4th lens, the 5th lens, the 6th lens form rear group of lens of positive light coke, and diaphragm is between preceding group lens and rear group lens；Preceding group of lens, diaphragm, group lens, filter, image planes collectively form optical system afterwards, and the total length from the first optical surface of optical system to image planes is less than 8mm, and the angle of visual field of optical system is more than 180 °.The utility model realizes the miniaturization of optical system while fine aberration correction；And by focal power reasonable distribution, on the premise of ensureing as matter, temperature in use is expanded to 0 DEG C~50 DEG C, while cost is reduced, improves the market competitiveness.

Description

A kind of aspherical fish eye lens
Technical field
It the utility model is related to optical system and device design field, more particularly to a kind of aspherical fish eye lens.
Background technology
The fish-eye structure often used at present is usually to be made up of 8~11 eyeglasses, be common are：7 group of 8 chip knot Structure, 8 group of 10 slice structure, also just like Chinese patent literature CN104101989 A, Chinese patent literature CN105445910 A uses 11 lens to reach lens performance requirement, and still, this fish-eye optics overall length is longer, it is impossible to meets small The requirement of type, and it may not apply to low temperature environment, it is impossible to solve the problems, such as that high/low temperature parses focus drifting.
Utility model content
The purpose of this utility model aims to provide that a kind of optics overall length is smaller, aspherical fish eye lens of good imaging quality, To overcome weak point of the prior art.
A kind of aspherical fish eye lens designed by this purpose, its architectural feature is disposed with along light incident direction First lens of positive light coke, the second lens of negative power, the 3rd lens of positive light coke, positive light coke the 4th lens, 5th lens of positive light coke and the 6th lens of negative power, wherein, the first lens, the second lens, the 3rd lens form negative Preceding group of lens of focal power, the 4th lens, the 5th lens, the 6th lens form rear group of lens of positive light coke, before diaphragm is located at Between group lens and rear group lens；Preceding group of lens, diaphragm, group lens, filter, image planes collectively form optical system afterwards, from optics First optical surface of system is less than 8mm to the total length of image planes, and the angle of visual field of optical system is more than 180 °.
After above-mentioned technical scheme, by repeatedly testing repeatedly, after the whole proportional scaling of optical system, matter is imaged Amount is still good.
Further, first lens are Glass aspheric, the second lens, the 3rd lens, the 4th lens, the 5th lens and 6th lens are that plastic cement is aspherical；The first optical surface and the second optical surface, the first optics of the 5th lens of 3rd lens Surface is backwards to diaphragm；The first optical surface and the second optical surface of first lens, the first optical surface of the second lens and Second optical surface, the first optical surface of the 4th lens and the second optical surface, the second optical surface of the 5th lens, the 6th The first optical surface and the second optical surface of lens bend towards diaphragm.
It is abnormal to reach its so as to reduce chief ray drift angle by the relative aperture for the optical surface for controlling above-mentioned each lens Become the particular/special requirement less than 100%.
Further, it is described to be along light incident direction, the circular cone whose conic coefficient of the first optical surface of the first lens k1,
The circular cone whose conic coefficient of second optical surface of the first lens is k2,
The circular cone whose conic coefficient of first optical surface of the second lens is k3,
The circular cone whose conic coefficient of second optical surface of the second lens is k4,
The circular cone whose conic coefficient of first optical surface of the 3rd lens is k5,
The circular cone whose conic coefficient of second optical surface of the 3rd lens is k6,
The circular cone whose conic coefficient of the optical surface of diaphragm is k7,
The circular cone whose conic coefficient of first optical surface of the 4th lens is k8,
The circular cone whose conic coefficient of second optical surface of the 4th lens is k9,
The circular cone whose conic coefficient of first optical surface of the 5th lens is k10,
The circular cone whose conic coefficient of second optical surface of the 5th lens is k11,
The circular cone whose conic coefficient of first optical surface of the 6th lens is k12,
The circular cone whose conic coefficient of second optical surface of the 6th lens is k13,
Wherein, k1<- 1 is that hyperbola is aspherical, k6>0 is that flat ellipse is aspherical, k8>0 is that flat ellipse is aspherical, k13<- 1 is Hyperbola is aspherical.
It is aspherical by adding, Lens can be effectively reduced, make lens construction compacter.Meanwhile can effectively it control Off-axis aberration, improve the image quality of system
Further, the face type of all non-spherical lenses meets below equation：
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a4y8+a5y10+a6y12+a7y14,
Wherein, parameter c is the curvature corresponding to the radius of non-spherical lens；
Y is the radial coordinate of non-spherical lens, and its unit is identical with length of lens unit；
K is the circular cone whose conic coefficient of non-spherical lens；
Work as k<When -1, the face type curve of corresponding non-spherical lens is hyperbola；
As k=-1, the face type curve of corresponding non-spherical lens is parabola；
When -1<k<When 0, the face type curve of corresponding non-spherical lens is ellipse；
As k=0, the face type of corresponding non-spherical lens is round；
Work as k>When 0, the face type of corresponding non-spherical lens is flat ellipse curve；
A1 to a7 represents the coefficient corresponding to the radial coordinate of each non-spherical lens respectively.
The aspherical geomery on two image optics surfaces of lens can be accurately set by above parameter.
Further, the effective aperture of the second optical surface of second lens is D2, the second optics table of the first lens The radius of curvature in face is R2, it meets relational expression：
0.2<D2/2R2<0.6。
It is hemispherical or the situation close to hemisphere to avoid fish-eye first lens of the overwhelming majority, is greatly improved The machinability of eyeglass.
Further, the angle of half field-of view of the optical system is ω, and it meets relational expression：2 ω=180 °.
Further, the effective focal length of the preceding group lens is fBefore, the rear effective focal length for organizing lens is fAfterwards, optical system has Effect focal length is F, and it meets relational expression：
-3<fBefore/F<- 2.5,1<fAfterwards/F<1.5。
By organizing lens and rear group power of lens before reasonable distribution, in control system distortion simultaneously, it is also ensured that light The requirement of the longer optic back focal of system.
Further, the Abbe number of the 3rd lens is v3, the Abbe number of the 4th lens is v4, it meets relational expression：
20<v3<30,55<v4<82。
By adjusting the 3rd lens and the 4th lens, the Abbe number of both is differed larger, be advantageous to optical system Chromatic aberration correction.
Further, it is described high along light incident direction, the chief ray incident of the first lens to the optical surface of the 6th lens Degree is followed successively by hi, the effective focal length of the first lens to the 6th lens is followed successively by fi, the effective focal length of optical system is F, wherein, i= 1、2、3、……、6；J=1,2,3 ..., 6；It meets relational expression：
-10<h1f1/F<-8.92；0.96<h2f2/F<1.2；-2.3<h3f3/F<-1.97；
0.01<h4f4/F<0.04；0.18<h5f5/F<0.25；-0.78<h6f6/F<-0.15。
By each power of lens of reasonable distribution, glass is efficiently solved, modeling hybrid lens go out in variation of ambient temperature The problem of existing image blur, its temperature range is expanded as 0 DEG C -50 DEG C.
In summary, the utility model uses 6 aspherics structures, wherein five plastic aspheric lenes, a piece of Glass aspheric lenses, while fine aberration correction, the miniaturization of optical system is realized, by the overall length control of optical system System is within 8mm；And by the reasonable distribution of focal power, on the premise of ensureing as matter, solve the problems, such as thermal drift, realize Optical system without thermalized design, its temperature in use is expanded to 0 DEG C~50 DEG C, while cost is reduced, improves market Competitiveness.
Brief description of the drawings
Fig. 1 is the lens schematic diagram of the embodiment of the utility model one.
Fig. 2 is 20 DEG C of analysis diagrams of first embodiment.
Fig. 3 is 0 DEG C of analysis diagram of first embodiment.
Fig. 4 is 50 DEG C of analysis diagrams of first embodiment.
Fig. 5 is the curvature of field, the distortion figure of first embodiment.
Fig. 6 is the longitudinal aberration diagram of first embodiment.
Fig. 7 is the lateral chromatic aberration figure of first embodiment.
Fig. 8 is 20 DEG C of analysis diagrams of second embodiment.
Fig. 9 is 0 DEG C of analysis diagram of second embodiment.
Figure 10 is 50 DEG C of analysis diagrams of second embodiment.
Figure 11 is the curvature of field, the distortion figure of second embodiment.
Figure 12 is the longitudinal aberration diagram of second embodiment.
Figure 13 is the lateral aberration diagram of second embodiment.
Figure 14 is 20 DEG C of analysis diagrams of 3rd embodiment.
Figure 15 is 0 DEG C of analysis diagram of 3rd embodiment.
Figure 16 is 50 DEG C of analysis diagrams of 3rd embodiment.
Figure 17 is the curvature of field, the distortion figure of 3rd embodiment.
Figure 18 is the longitudinal aberration diagram of 3rd embodiment.
Figure 19 is the lateral aberration diagram of 3rd embodiment.
In figure：L1 is the first lens, and L2 is the second lens, and L3 is the 3rd lens, and L4 is the 4th lens, and L5 is the 5th saturating Mirror, L6 are the 6th lens, and stop is diaphragm, and filter is colour filter.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the utility model.
First embodiment
Referring to Fig. 1-Fig. 7, this aspherical fish eye lens, the first saturating of positive light coke is disposed with along light incident direction Mirror L1, the second lens L2 of negative power, the 3rd lens L3 of positive light coke, the 4th lens L4, the positive light coke of positive light coke The 5th lens L5 and negative power the 6th lens L6, wherein, the first lens L1, the second lens L2, the 3rd lens L3 form Preceding group of lens of negative power, the 4th lens L4, the 5th lens L5, the 6th lens L6 form rear group of lens of positive light coke, light Door screen is between preceding group lens and rear group lens；Preceding group of lens, diaphragm, group lens, filter, image planes collectively form optical system afterwards System, the total length from the first optical surface of optical system to image planes are less than 8mm, and the angle of visual field of optical system is more than 180 °.
The first lens L1 is Glass aspheric, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 6th lens L6 is that plastic cement is aspherical；3rd lens L3 the first optical surface and the second optical surface, the 5th lens L5 The first optical surface backwards to diaphragm；First lens L1 the first optical surface and the second optical surface, the second lens L2 First optical surface and the second optical surface, the 4th lens L4 the first optical surface and the second optical surface, the 5th lens L5 The second optical surface, the 6th lens L6 the first optical surface and the second optical surface bend towards diaphragm.
It is described along light incident direction, the circular cone whose conic coefficient of the first lens L1 the first optical surface is k1,
The circular cone whose conic coefficient of first lens L1 the second optical surface is k2,
The circular cone whose conic coefficient of second lens L2 the first optical surface is k3,
The circular cone whose conic coefficient of second lens L2 the second optical surface is k4,
The circular cone whose conic coefficient of 3rd lens L3 the first optical surface is k5,
The circular cone whose conic coefficient of 3rd lens L3 the second optical surface is k6,
The circular cone whose conic coefficient of the optical surface of diaphragm is k7,
The circular cone whose conic coefficient of 4th lens L4 the first optical surface is k8,
The circular cone whose conic coefficient of 4th lens L4 the second optical surface is k9,
The circular cone whose conic coefficient of 5th lens L5 the first optical surface is k10,
The circular cone whose conic coefficient of 5th lens L5 the second optical surface is k11,
The circular cone whose conic coefficient of 6th lens L6 the first optical surface is k12,
The circular cone whose conic coefficient of 6th lens L6 the second optical surface is k13,
Wherein, k1<- 1 is that hyperbola is aspherical, k6>0 is that flat ellipse is aspherical, k8>0 is that flat ellipse is aspherical, k13<- 1 is Hyperbola is aspherical.
Further, the face type of all non-spherical lenses meets below equation：
Z=cy2/{1+[1-(1+k)c2y2]1/2}+a1y2+a2y4+a4y8+a5y10+a6y12+a7y14,
Wherein, parameter c is the curvature corresponding to the radius of non-spherical lens；
Y is the radial coordinate of non-spherical lens, and its unit is identical with length of lens unit；
K is the circular cone whose conic coefficient of non-spherical lens；
Work as k<When -1, the face type curve of corresponding non-spherical lens is hyperbola；
As k=-1, the face type curve of corresponding non-spherical lens is parabola；
When -1<k<When 0, the face type curve of corresponding non-spherical lens is ellipse；
As k=0, the face type of corresponding non-spherical lens is round；
Work as k>When 0, the face type of corresponding non-spherical lens is flat ellipse curve；
A1 to a7 represents the coefficient corresponding to the radial coordinate of each non-spherical lens respectively.
The effective aperture of the second optical surface of the second lens L2 is D2, the first lens L1 the second optical surface Radius of curvature is R2, it meets relational expression：
0.2<D2/2R2<0.6。
Further, the angle of half field-of view of the optical system is ω, and it meets relational expression：2 ω=180 °.
Further, the effective focal length of the preceding group lens is fBefore, the rear effective focal length for organizing lens is fAfterwards, optical system has Effect focal length is F, and it meets relational expression：-3<fBefore/F<- 2.5,1<fAfterwards/F<1.5。
The Abbe number of 3rd lens is v3, the Abbe number of the 4th lens is v4, it meets relational expression：20<v3<30,55 <v4<82。
It is described along light incident direction, the first lens L1 to the 6th lens L6 optical surface chief ray incident height according to Secondary is hi, the first lens L1 to the 6th lens L6 effective focal length is followed successively by fi, the effective focal length of optical system is F, wherein, i= 1、2、3、……、6；J=1,2,3 ..., 6；It meets relational expression：
-10<h1f1/F<-8.92；0.96<h2f2/F<1.2；-2.3<h3f3/F<-1.97；
0.01<h4f4/F<0.04；0.18<h5f5/F<0.25；-0.78<h6f6/F<-0.15。
In the present embodiment, associated technical parameters are as shown in following table one.
Table one
Number in face R values Thickness (mm) Refractive index Abbe number
OBJ Infinity 550.603
S1 2.76 0.62 1.59 61.16
S2 5.37 0.29
S3 16.03 0.31 1.53 55.77
S4 0.82 0.62
S5 -15.49 0.83 1.64 22.40
S6 -4.16 0.63
S7(Stop) Infinity 0.03
S8 -55.15 0.35 1.53 55.77
S9 -1.68 0.11
S10 3.32 0.63 1.53 55.77
S11 -1.19 0.08
S12 -1.24 0.89 1.64 22.40
S13 -15.59 0.43
S14 Infinity 0.21 1.51 64.16
S15 Infinity 1.31
IMAGE Infinity
In table one above, S1 is the first lens L1 the first optical surface, and S2 is the first lens L1 the second optics table Face, S3 are the second lens L2 the first optical surface, and S4 is the second lens L2 the second optical surface, and S5 is the 3rd lens L3's First optical surface, S6 are the 3rd lens L3 the second optical surface, and S7 is diaphragm, and S8 is the 4th lens L4 the first optics table Face, S9 are the 4th lens L4 the second optical surface, and S10 is the 5th lens L5 the first optical surface, and S11 is the 5th lens L5 The second optical surface, S12 be the 6th lens L6 the first optical surface, S13 be the 6th lens L6 the second optical surface, S14 is the first optical surface of filter, and S15 is the second optical surface of filter.
From table one above by calculating, the physical parameter table one of following optical system can be obtained.
The physical parameter table one of optical system
Number in face K a2 a3 a4 a5 a6
S1 -3.06 -3.20E-02 1.98E-03 5.16E-04 -5.25E-05
S2 -0.53 -2.24E-02 3.17E-02 -1.60E-02 2.72E-03
S3 -50.04 1.57E-02 -6.16E-04 -2.12E-02 1.10E-02 -1.64E-03
S4 -1.20 -2.53E-02 -5.06E-02 -1.12E-02 2.23E-02 2.96E-02
S5 -2.73 -7.85E-02 3.35E-02 1.24E-02 1.01E-02 -1.78E-02
S6 7.55 3.96E-02 8.94E-02 -3.98E-02 -1.25E-02 1.00E-02
S8 10.04 3.40E-02 -2.13E-01 -3.51E-02 -8.85E-01 3.18E-01
S9 -0.53 1.67E-01 -4.89E-01 -7.05E-01 2.92E+00 -3.66E+00
S10 8.491 1.99E-01 -5.77E-01 8.37E-01 -6.25E-01 2.47E-01
S11 -4.55 -9.89E-02 1.08E-01 -1.24E-01 8.92E-02 8.77E-02
S12 -3.35 -9.74E-02 2.21E-02 -1.35E-01 2.33E-01 -1.58E-01
S13 -10.37 5.68E-02 -3.92E-03 -3.13E-03 -1.11E-04 -9.25E-04
Coefficient in the physical parameter table one of the optical system, it is aspherical each coefficient.
The Specifications finally obtained are：Focal length：1.97mm relative aperture：2.83 the angle of visual field：2 ω=180 °, F- θ distort：- 83.79%, total length of light path：7.35mm, optics rear cut-off distance：1.88mm.
Second embodiment
Referring to Fig. 8-Figure 13, in the present embodiment, associated technical parameters are as shown in following table two.
Table two
Number in face R values Thickness (mm) Refractive index Abbe number
OBJ Infinity 550.603
S1 2.78 0.62 1.59 61.16
S2 5.05 0.32
S3 14.09 0.31 1.53 55.77
S4 1.82 0.63
S5 -15.64 0.83 1.64 20.62
S6 -3.10 0.63
S7(Stop) Infinity 0.02
S8 -39.54 0.35 1.54 81.01
S9 -1.66 0.10
S10 3.32 0.63 1.53 55.77
S11 -1.03 0.09
S12 -1.25 0.89 1.64 22.40
S13 -5.94 0.43
S14 Infinity 0.21 1.51 64.16
S15 Infinity 1.3
IMA Infinity
From table two above by calculating, the physical parameter table two of following optical system can be obtained.
The physical parameter table two of optical system
The Specifications finally obtained are：Focal length：1.96mm relative aperture：2.83 the angle of visual field：2 ω=180 °, F- θ distort：- 83.64%, total length of light path：7.3mm, optics rear cut-off distance：1.94mm.
First embodiment is seen in remaining not described part, repeats no more.
3rd embodiment
Referring to Figure 14-Figure 19, in the present embodiment, associated technical parameters are as shown in following table three.
Table three
Number in face R values Thickness (mm) Refractive index Abbe number
OBJ Infinity 1101.206
S1 11.52 1.24 1.59 61.16
S2 10.74 0.59
S3 32.06 0.62 1.53 55.77
S4 1.64 1.24
S5 -30.98 1.66 1.64 22.40
S6 -8.32 1.26
S7(Stop) Infinity 0.06
S8 -110.31 0.7 1.53 55.77
S9 -3.36 0.22
S10 6.64 1.26 1.53 55.77
S11 -2.38 0.17
S12 -2.48 1.78 1.64 22.40
S13 -31.18 0.86
S14 Infinity 0.42 1.51 64.16
S15 Infinity 2.622158
IMA Infinity
From table three above by calculating, the physical parameter table three of following optical system can be obtained.
The physical parameter table three of optical system
Number in face K a2 a3 a4 a5 a6
S1 -3.02073 -4.12E-03 6.17E-05 3.96E-06 -1.03E-07
S2 -0.52987 -2.80E-03 9.91E-04 -1.25E-04 5.32E-06
S3 -50.0413 1.97E-03 -1.93E-05 -1.66E-04 2.15E-05 -8.01E-07
S4 -1.20409 -3.16E-03 -1.58E-03 -8.75E-05 4.36E-05 1.44E-05
S5 -2.73604 -9.82E-03 1.05E-03 9.65E-05 1.97E-05 -8.67E-06
S6 7.521017 4.96E-03 2.79E-03 -3.11E-04 -2.45E-05 4.90E-06
S8 6.231445 4.25E-03 -6.67E-03 -2.74E-04 -1.73E-03 1.55E-04
S9 -0.53095 2.09E-02 -1.53E-02 -5.51E-03 5.70E-03 -1.79E-03
S10 8.491048 2.49E-02 -1.80E-02 6.54E-03 -1.22E-03 1.21E-04
S11 -4.55435 -1.24E-02 3.38E-03 -9.72E-04 1.74E-04 4.28E-05
S12 -3.35728 -1.22E-02 6.90E-04 -1.05E-03 4.55E-04 -7.70E-05
S13 -5.26102 7.10E-03 -1.22E-04 -2.44E-05 -2.16E-07 -4.52E-07
The Specifications finally obtained are：Focal length：3.94mm relative aperture：2.83 the angle of visual field：2 ω=180 °, F- θ distort：- 83.79%, total length of light path：14.70mm optics rear cut-off distance：3.76mm.
First embodiment is seen in remaining not described part, repeats no more.
The various embodiments described above meet to require：
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model Claimed scope is by appended claims and its equivalent thereof.

Claims (8)

  1. A kind of 1. aspherical fish eye lens, it is characterized in that being disposed with the first lens of positive light coke along light incident direction (L1), the second lens (L2) of negative power, the 3rd lens (L3) of positive light coke, the 4th lens (L4) of positive light coke, just 5th lens (L5) of focal power and the 6th lens (L6) of negative power, wherein, the first lens (L1), the second lens (L2), 3rd lens (L3) form preceding group of lens of negative power, and the 4th lens (L4), the 5th lens (L5), the 6th lens (L6) are formed Rear group of lens of positive light coke, diaphragm is between preceding group lens and rear group lens；Preceding group of lens, diaphragm, lens, filter are organized afterwards Mirror, image planes collectively form optical system, and the total length from the first optical surface of optical system to image planes is less than 8mm, optical system The angle of visual field of system is more than 180 °.
  2. 2. aspherical fish eye lens according to claim 1, it is characterized in that first lens (L1) are Glass aspheric, Second lens (L2), the 3rd lens (L3), the 4th lens (L4), the 5th lens (L5) and the 6th lens (L6) are plastic cement aspheric Face；
    The first optical surface and the second optical surface of 3rd lens (L3), the first optical surface of the 5th lens (L5) are backwards Diaphragm；
    The first optical surface and the second optical surface, the first optical surface and second of the second lens (L2) of first lens (L1) Optical surface, the first optical surface of the 4th lens (L4) and the second optical surface, the 5th lens (L5) the second optical surface, The first optical surface and the second optical surface of 6th lens (L6) bend towards diaphragm.
  3. 3. aspherical fish eye lens according to claim 1, it is characterized in that described along light incident direction, the first lens (L1) the circular cone whose conic coefficient of the first optical surface is k1,
    The circular cone whose conic coefficient of second optical surface of the first lens (L1) is k2,
    The circular cone whose conic coefficient of first optical surface of the second lens (L2) is k3,
    The circular cone whose conic coefficient of second optical surface of the second lens (L2) is k4,
    The circular cone whose conic coefficient of first optical surface of the 3rd lens (L3) is k5,
    The circular cone whose conic coefficient of second optical surface of the 3rd lens (L3) is k6,
    The circular cone whose conic coefficient of the optical surface of diaphragm is k7,
    The circular cone whose conic coefficient of first optical surface of the 4th lens (L4) is k8,
    The circular cone whose conic coefficient of second optical surface of the 4th lens (L4) is k9,
    The circular cone whose conic coefficient of first optical surface of the 5th lens (L5) is k10,
    The circular cone whose conic coefficient of second optical surface of the 5th lens (L5) is k11,
    The circular cone whose conic coefficient of first optical surface of the 6th lens (L6) is k12,
    The circular cone whose conic coefficient of second optical surface of the 6th lens (L6) is k13,
    Wherein, k1＜ -1 is that hyperbola is aspherical, k6＞ 0 is that flat ellipse is aspherical, k8＞ 0 is that flat ellipse is aspherical, k13＜ -1 is Hyperbola is aspherical.
  4. 4. aspherical fish eye lens according to claim 1, it is characterized in that the second optics table of second lens (L2) The effective aperture in face is D2, the radius of curvature of the second optical surface of the first lens (L1) is R2, it meets relational expression：0.2<D2/ 2R2<0.6。
  5. 5. aspherical fish eye lens according to claim 1, it is characterized in that the angle of half field-of view of the optical system is ω, its Meet relational expression：2 ω=180 °.
  6. 6. aspherical fish eye lens according to claim 1, it is characterized in that the effective focal length of group lens is f before describedBefore, after The effective focal length of group lens is fAfterwards, the effective focal length of optical system is F, and it meets relational expression：-3<fBefore/F<- 2.5,1<fAfterwards/F< 1.5。
  7. 7. aspherical fish eye lens according to claim 1, it is characterized in that the Abbe number of the 3rd lens (L3) is v3, The Abbe number of 4th lens is v4, it meets relational expression：
    20<v3<30,55<v4<82。
  8. 8. aspherical fish eye lens according to claim 1, it is characterized in that described along light incident direction, the first lens (L1) to the chief ray incident of the optical surface of the 6th lens (L6) is highly followed successively by hi, the first lens (L1) to the 6th lens (L6) effective focal length is followed successively by fj, the effective focal length of optical system is F, wherein, i=1,2,3 ..., 6；J=1,2, 3、……、6；It meets relational expression：
    -10<h1f1/F<-8.92；0.96<h2f2/F<1.2；-2.3<h3f3/F<-1.97；
    0.01<h4f4/F<0.04；0.18<h5f5/F<0.25；-0.78<h6f6/F<-0.15。
CN201720346066.5U 2017-04-05 2017-04-05 A kind of aspherical fish eye lens Withdrawn - After Issue CN206657132U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106908938A (en) * 2017-04-05 2017-06-30 舜宇光学(中山)有限公司 A kind of aspherical fish eye lens
CN110646928A (en) * 2018-06-27 2020-01-03 宁波舜宇车载光学技术有限公司 Optical lens
WO2023279362A1 (en) * 2021-07-09 2023-01-12 欧菲光集团股份有限公司 Optical system, image capturing module and electronic device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106908938A (en) * 2017-04-05 2017-06-30 舜宇光学(中山)有限公司 A kind of aspherical fish eye lens
CN106908938B (en) * 2017-04-05 2023-10-20 舜宇光学(中山)有限公司 Aspherical fisheye lens
CN110646928A (en) * 2018-06-27 2020-01-03 宁波舜宇车载光学技术有限公司 Optical lens
CN110646928B (en) * 2018-06-27 2022-01-21 宁波舜宇车载光学技术有限公司 Optical lens
WO2023279362A1 (en) * 2021-07-09 2023-01-12 欧菲光集团股份有限公司 Optical system, image capturing module and electronic device

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