CN209496194U - A kind of optical imaging lens - Google Patents
A kind of optical imaging lens Download PDFInfo
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- CN209496194U CN209496194U CN201920389529.5U CN201920389529U CN209496194U CN 209496194 U CN209496194 U CN 209496194U CN 201920389529 U CN201920389529 U CN 201920389529U CN 209496194 U CN209496194 U CN 209496194U
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Abstract
The utility model relates to lens technology fields.The utility model discloses a kind of optical imaging lens, along an optical axis successively include the first lens to the 7th lens from object side to image side, the first lens are the meniscus for having negative refractive index；Second lens have negative refractive index, and object side is convex；The third lens have positive refractive index, and image side surface is convex；4th lens are the meniscus for having positive refractive index, and the 5th lens have positive refractive index, and image side surface is convex；6th lens have negative refractive index, and object side is convex；7th lens have positive refractive index, and image side surface is convex surface, and the object side of the 7th lens and image side surface are aspherical.The utility model has principal angle of incidence big, and quality of optical imaging is good, and small in size, light-weight advantage.
Description
Technical field
The utility model belongs to lens technology field, more particularly to a kind of optical imaging lens of seven chips.
Background technique
With the continuous progress of technology, in recent years, optical imaging lens are also grown rapidly, and are widely used in intelligence
The every field such as mobile phone, tablet computer, video conference, safety monitoring, unmanned plane.Apply when on unmanned plane, it is desirable to optics at
As volume, the weight of camera lens are smaller, to reduce unmanned plane overall weight, cruising ability is improved, but existing is applied in unmanned plane
On optical imaging lens volume, weight it is larger, be unable to satisfy requirement.
In addition, the sensor of general big CRA (principal angle of incidence), cost is relatively low, but because CRA is excessive, is difficult the stabilization found
Full glass optical imaging lens go to match；The camera lens resolving power of existing big CAR is poor；Color difference is larger, and color difference reduction degree is poor, and abnormal
Become serious, is unable to satisfy increasing optical imagery performance requirement.
Summary of the invention
The purpose of this utility model is to provide one kind to have principal angle of incidence big, and quality of optical imaging is good, and small in size,
Light-weight optical imaging lens are above-mentioned to solve the problems, such as.
To achieve the above object, the technical solution adopted in the utility model are as follows: a kind of optical imaging lens, from object side to picture
One optical axis of lateral edge successively includes the first lens, the second lens, the third lens, the 4th lens, diaphragm, the 5th lens, the 6th lens
With the 7th lens；First lens to the 7th lens respectively include one towards object side and the object side for passing through imaging ray and
One towards image side and the image side surface that passes through imaging ray；
First lens have negative refractive index, and the object side of first lens is convex surface, and the image side surface of first lens is recessed
Face；
Second lens have negative refractive index, and the object side of second lens is concave surface；
The third lens have positive refractive index, and the image side surface of the third lens is convex surface；
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is recessed
Face；
5th lens have positive refractive index, and the image side surface of the 5th lens is convex surface；
6th lens have negative refractive index, and the object side of the 6th lens is concave surface；
7th lens have positive refractive index, and the image side surface of the 7th lens is convex surface, the object side of the 7th lens and picture
Side is aspherical；
There are the optical imaging lens lens of refractive index there was only above-mentioned seven.
Further, which also meets: -3 < f1/f < -1,15 < R1 <, 25,3 < R2 < 8, wherein f1
For the focal length of first lens, f is the focal length of the optical imaging lens, and R1 is the radius of curvature of the object side of first lens,
R2 is the radius of curvature of the image side surface of first lens.
Further, the object side of the image side surface of second lens and the third lens is mutually glued, and meets: Vd2≤30,
Vd3 >=50, Vd3-Vd2 > 25, wherein Vd2 is abbe number of second lens in d line, and Vd3 is the third lens in d line
Abbe number.
Further, the object side of the image side surface and the 6th lens of the 5th lens is mutually glued, and meets: Vd5 >=50,
The , ∣ Vd6-Vd5 ∣ of Vd6≤35 > 25, wherein Vd5 is abbe number of the 5th lens in d line, and Vd6 is the 6th lens in d line
Abbe number.
Further, the object side of the 4th lens and image side surface are aspherical, and are met: Nd4 >=1.8, wherein
Nd4 is refractive index of the 4th lens in d line.
Further, which also meets: 0 < f7/f < 5, wherein f7 is the focal length of the 7th lens, and f is
The focal length of the optical imaging lens.
Further, which also meets: T1 > 1.0,1.5 < T23 < 4.0,1.5 < T56 < 3.0, wherein T1
For the thickness of first lens on the optical axis, T23 is thickness the sum of of second, third lens on the optical axis, and T56 is should
Thickness the sum of of five, the 6th lens on the optical axis.
Further, which also meets: ALT < 15, ALG < 5, wherein ALG be first lens to this
The air gap summation of seven lens on the optical axis, ALT are first lens to the 7th lens seven on the optical axis thoroughly
The summation of mirror thickness.
Further, which also meets: ALT/ALG < 4.2, wherein ALG be first lens to this
The air gap summation of seven lens on the optical axis, ALT are first lens to the 7th lens seven on the optical axis thoroughly
The summation of mirror thickness.
Further, the 4th lens and the 5th lens are closely arranged, and eyeglass is directly born against, and diaphragm uses soma anti-dazzling screen
To realize.
The advantageous effects of the utility model:
The utility model uses seven lens, and by the refractive index and concave-convex curved surface arrangement design to each lens,
Good (optical transfer function can reach 250lp/mm, 4K image quality) with principal angle of incidence big (CRA >=33 °), resolving power, color difference is minimum
The advantages of (435nm-656nm sections, color difference < 1um), optical distortion < 6% is small in size, light-weight (weight < 5g).
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model embodiment one；
The MTF figure that Fig. 2 is the 0.435-0.656um of the utility model embodiment one；
Fig. 3 is the curvature of field and distortion schematic diagram of the utility model embodiment one；
Fig. 4 is the chromatic longitudiinal aberration figure of the utility model embodiment one；
Fig. 5 is the defocusing curve figure of the 0.435-0.656um of the utility model embodiment one；
Fig. 6 is the structural schematic diagram of the utility model embodiment two；
The MTF figure that Fig. 7 is the 0.435-0.656um of the utility model embodiment two；
Fig. 8 is the curvature of field and distortion schematic diagram of the utility model embodiment two；
Fig. 9 is the chromatic longitudiinal aberration figure of the utility model embodiment two；
Figure 10 is the defocusing curve figure of the 0.435-0.656um of the utility model embodiment two；
Figure 11 is the structural schematic diagram of the utility model embodiment three；
The MTF figure that Figure 12 is the 0.435-0.656um of the utility model embodiment three；
Figure 13 is the curvature of field and distortion schematic diagram of the utility model embodiment three；
Figure 14 is the chromatic longitudiinal aberration figure of the utility model embodiment three；
Figure 15 is the defocusing curve figure of the 0.435-0.656um of the utility model embodiment three；
Figure 16 is the numerical tabular of each important parameter of three embodiments of the utility model.
Specific embodiment
To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses
A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment
Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new
The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention will be further described.
Described " lens have positive refractive index (or negative refractive index) ", refers to the lens with first-order theory theoretical calculation
Paraxial refractive index out is positive (or being negative).Described " the object sides (or image side surface) of lens " are defined as imaging ray and pass through
The particular range of lens surface.The face shape bumps judgement of lens can pass through according to the judgment mode of skill usual in the field
The sign of radius of curvature (being abbreviated as R value) judges the bumps of lens face shape deflection.R value common can be used in optical design software
In, such as Zemax or CodeV.R value is also common in the lens data sheet (lens data sheet) of optical design software.With
For object side, when R value be timing, be determined as object side be convex surface；When R value is negative, determine that object side is concave surface.Conversely,
For image side surface, when R value is timing, judgement image side surface is concave surface；When R value is negative, determine that image side surface is convex surface.
The utility model provides a kind of optical imaging lens, from object side to image side along an optical axis successively include the first lens,
Second lens, the third lens, the 4th lens, diaphragm, the 5th lens, the 6th lens and the 7th lens；First lens are to the 7th
Lens respectively include one towards object side and the object side for passing through imaging ray and one towards image side and pass through imaging ray
Image side surface；
First lens have negative refractive index, and the object side of first lens is convex surface, and the image side surface of first lens is recessed
Face；
Second lens have negative refractive index, and the object side of second lens is concave surface；
The third lens have positive refractive index, and the image side surface of the third lens is convex surface；
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is recessed
Face；
5th lens have positive refractive index, and the image side surface of the 5th lens is convex surface；
6th lens have negative refractive index, and the object side of the 6th lens is concave surface；
7th lens have positive refractive index, and the image side surface of the 7th lens is convex surface, the object side of the 7th lens and picture
Side is aspherical；The object side of 7th lens and image side surface reach the same of big CRA (principal angle of incidence) effect using aspherical
When, realize high-res, low distortion, low aberration, preferably lifting system performance shorten system length.
There are the optical imaging lens lens of refractive index there was only above-mentioned seven, using seven lens, and by each
The refractive index and concave-convex curved surface arrangement design of lens, have that principal angle of incidence is big, resolving power is good, and color difference is minimum, and optical distortion is small,
Advantage small in size and light-weight.
Preferably, which also meets: -3 < f1/f < -1,15 < R1 <, 25,3 < R2 < 8, wherein f1 is
The focal length of first lens, f are the focal length of the optical imaging lens, and R1 is the radius of curvature of the object side of first lens, R2
For the radius of curvature of the image side surface of first lens, systematical distortion is effectively reduced.
Preferably, the object side of the image side surface of second lens and the third lens is mutually glued, and meets: Vd2≤30,
Vd3 >=50, Vd3-Vd2 > 25, wherein Vd2 is abbe number of second lens in d line, and Vd3 is the third lens in d line
Abbe number；High low-dispersion material combines, effectively control color difference, optimizes image quality, lifting system performance.
Preferably, the object side of the image side surface and the 6th lens of the 5th lens is mutually glued, and meets: Vd5 >=50,
The , ∣ Vd6-Vd5 ∣ of Vd6≤35 > 25, wherein Vd5 is abbe number of the 5th lens in d line, and Vd6 is the 6th lens in d
The abbe number of line；High low-dispersion material combines, effectively control color difference, optimizes image quality, lifting system performance.
Preferably, the object side of the 4th lens and image side surface are aspherical, and are met: Nd4 >=1.8, wherein Nd4
It is the 4th lens in the refractive index of d line, preferably lifting system performance, corrects aberration, shorten the system of optical imaging lens
Length reduces weight.
Preferably, which also meets: 0 < f7/f < 5, wherein f7 is the focal length of the 7th lens, and f is light
The focal length for learning imaging lens, while further reaching big CRA effect, realization high-res, low distortion, low aberration, preferably
Lifting system performance shortens the system length of optical imaging lens.
Preferably, which also meets: T1 > 1.0,1.5 < T23 < 4.0,1.5 < T56 < 3.0, wherein T1 is
The thickness of first lens on the optical axis, T23 are thickness the sum of of second, third lens on the optical axis, T56 be this
Five, thickness the sum of of the 6th lens on the optical axis；Further to shorten the system length of optical imaging lens, and it is easy to process
Manufacture, optimization of system config.
Preferably, which also meets: ALT < 15, ALG < 5, wherein ALG is first lens to the 7th
The air gap summation of the lens on the optical axis, ALT are seven lens of first lens to the 7th lens on the optical axis
The summation of thickness；Further to shorten the system length of optical imaging lens, and easy to manufacture, optimization of system config.
Preferably, which also meets: ALT/ALG < 4.2, wherein ALG is first lens to the 7th
The air gap summation of the lens on the optical axis, ALT are seven lens of first lens to the 7th lens on the optical axis
The summation of thickness；Further to shorten the system length of optical imaging lens, and easy to manufacture, optimization of system config.
Preferably, the 4th lens and the 5th lens are closely arranged, and eyeglass is directly born against, diaphragm using soma anti-dazzling screen come
It realizes；Help to reduce diaphragm tolerance of interval, improves system margins.
Preferably, the first lens to the 7th lens are made of glass material, but not limited to this, in some embodiments,
It is also possible to the other materials such as plastic cement to be made.
It will be described in detail below with optical imaging lens of the specific embodiment to the utility model.
Implement one
It along an optical axis I successively include the first lens from object side A1 to image side A2 as shown in Figure 1, a kind of optical imaging lens
1, the second lens 2, the third lens 3, the 4th lens 4, diaphragm 9, the 5th lens 5, the 6th lens 6, the 7th lens 7, plate glass 8
With imaging surface 100；First lens, 1 to the 7th lens 7 respectively include one towards object side A1 and the object side that passes through imaging ray
Face and one is towards image side A2 and the image side surface that passes through imaging ray；
First lens 1 have negative refractive index, and the object side 11 of first lens 1 is convex surface, the image side surface of first lens 1
12 be concave surface；
Second lens 2 have negative refractive index, and the object side 21 of second lens 2 is concave surface, the image side surface of second lens 2
22 be convex surface；
The third lens 3 have positive refractive index, and the object side 31 of the third lens 3 is concave surface, the image side surface of the third lens 3
32 be convex surface；
4th lens 4 have positive refractive index, and the object side 41 of the 4th lens 4 is convex surface, the image side surface of the 4th lens 4
42 be concave surface, and the object side 41 of the 4th lens 4 and image side surface 42 are aspherical；
5th lens 5 have positive refractive index, and the object side 51 of the 5th lens 5 is concave surface, the image side surface of the 5th lens 5
52 be convex surface；
6th lens 6 have negative refractive index, and the object side 61 of the 6th lens 6 is concave surface, the image side surface of the 6th lens 6
62 be convex surface；
7th lens 7 have positive refractive index, and the object side 71 of the 7th lens 7 is concave surface, the image side surface of the 7th lens 7
72 be convex surface, and the object side 71 of the 7th lens 7 and image side surface 72 are aspherical.
In this specific embodiment, the second lens 2 and the third lens 3 are balsaming lens, and the 5th lens 5 and the 6th lens 6 are
Balsaming lens.
In this specific embodiment, the 4th lens 4 and the 5th lens 5 are closely arranged, and eyeglass is directly born against, and diaphragm 9 uses
Soma anti-dazzling screen is realized.
The detailed optical data of this specific embodiment are as shown in table 1-1.
The detailed optical data of table 1-1 embodiment one
| Surface | Radius of curvature | Thickness | Material | Refractive index | Abbe number | Focal length | |
| - | Object plane shot | Plane | Infinity | ||||
| 11 | First lens | 15.74 | 1.48 | Glass | 1.49 | 70.4 | -9.3 |
| 12 | 3.42 | 3.07 | |||||
| 21 | Second lens | -5.19 | 0.78 | Glass | 1.81 | 25.5 | -6.8 |
| 22 | -82.25 | 0 | |||||
| 31 | The third lens | -82.25 | 1.47 | Glass | 1.76 | 52.3 | 8.0 |
| 32 | -5.69 | 0.07 | |||||
| 41 | 4th lens | 3.40 | 2.92 | Glass | 1.83 | 37.3 | 5.4 |
| 42 | 8.24 | 0.11 | |||||
| 9 | Diaphragm | Plane | 0.10 | ||||
| 51 | 5th lens | -21.86 | 1.46 | Glass | 1.61 | 58.6 | 2.5 |
| 52 | -1.50 | 0 | |||||
| 61 | 6th lens | -1.50 | 0.50 | Glass | 1.70 | 30.1 | -2.4 |
| 62 | -15.85 | 0.10 | |||||
| 71 | 7th lens | -7.02 | 0.93 | Glass | 1.77 | 49.5 | 14.1 |
| 72 | -4.53 | 0.50 | |||||
| 8 | Plate glass | Plane | 0.30 | Glass | 1.52 | 64.2 | - |
| - | Plane | 3.21 | |||||
| 100 | Imaging surface | - | - |
In this specific embodiment, 71 He of object side of the object side 41 of the 4th lens 4 and image side surface 42 and the 7th lens 7
Image side surface 72 is defined according to following aspheric curve formula:
Wherein:
Z: (point for being y apart from optical axis on aspherical and is tangential on cutting for vertex on aspherical optical axis for aspherical depth
Face, vertical range between the two)；
C: the curvature (the vertex curvature) of aspheric vertex of surface；
K: conical surface coefficient (Conic Constant)；
Radial distance (radial distance)；
rn: normalization radius (normalizationradius (NRADIUS))；
U:r/rn；
am: m rank QconCoefficient (is the mth Qconcoefficient)；
Qm con: m rank QconMultinomial (the mth Qconpolynomial)；
Each aspherical parameter detailed data please refers to following table:
| Surface | 41 | 42 | 71 | 72 |
| K= | 0.12 | -42.97 | -71.72 | -13.47 |
| a4= | 5.34E-04 | 0.015 | -0.016 | -0.01 |
| a6= | -5.52E-05 | 8.46E-03 | 0.011 | 3.82E-3 |
| a8= | 4.16E-05 | -0.017 | -2.32E-3 | 3.04E-5 |
| a10= | -4.96E-06 | 0.016 | 2.4E-4 | -8.82E-5 |
| a12= | -5.05E-07 | -5.62E-03 | -1.89E-7 | 1.09E-5 |
The numerical value of each conditional expression of this specific embodiment please refers to Figure 16, wherein T4 is the 4th lens 4 at this
Thickness on optical axis I, T7 are thickness of the 7th lens 7 on optical axis I, and G12 is that first lens 1 arrive second lens 2
The air gap on optical axis I, G34 are the air gap of the third lens 3 to the 4th lens 4 on optical axis I；G67 is should
The air gap of 6th lens 6 to the 7th lens 7 on optical axis I, Gstop are the 9 front and back the air gap summation of diaphragm.
The MTF transfer curve figure of the 0.435-0.656um section of this specific embodiment is detailed in Fig. 2, the curvature of field and distortion figure
It is detailed in Fig. 3 (A) and Fig. 3 (B), chromatic longitudiinal aberration figure is detailed in Fig. 4, and 0.435-0.656um sections of defocusing curve figure is detailed in Fig. 5.
In this specific embodiment, the focal length f=4.6mm of optical imaging lens；F-number FNO=2.8；Image planes size Ф=
8mm；Distance TTL=17.0mm of first lens 1 to the imaging surface 100 on optical axis I, CAR=33 ° of color difference of principal angle of incidence are
LCA=0.47um.
Embodiment two
As shown in fig. 6, the present embodiment and the face type bumps and refractive index of each lens of embodiment one are identical roughly the same,
Only the image side surface 22 of the second lens 2 is concave surface, and the object side of the third lens 3 is convex surface, and the object side 51 of the 5th lens 5 is flat
Face, the image side surface 62 of the 6th lens 6 are concave surface, and the object side 71 of the 7th lens is the curvature half of convex surface and each lens surface
The optical parameter difference of diameter, lens thickness, lens asphericity coefficient and system focal length.
The detailed optical data of this specific embodiment are as shown in table 2-1.
The detailed optical data of table 2-1 embodiment two
| Surface | Radius of curvature | Thickness | Material | Refractive index | Abbe number | Focal length | |
| - | Object plane shot | Plane | Infinity | ||||
| 11 | First lens | 21.50 | 2.60 | Glass | 1.55 | 63.3 | -8.9 |
| 12 | 3.83 | 2.86 | |||||
| 21 | Second lens | -6.78 | 1.66 | Glass | 1.81 | 25.5 | -7.6 |
| 22 | 98.79 | 0 | |||||
| 31 | The third lens | 98.79 | 1.73 | Glass | 1.76 | 52.3 | 8.7 |
| 32 | -7.08 | 0.08 | |||||
| 41 | 4th lens | 3.78 | 3.77 | Glass | 1.83 | 37.3 | 6.7 |
| 42 | 6.30 | 0.08 | |||||
| 9 | Diaphragm | Plane | 0.12 | ||||
| 51 | 5th lens | Plane | 1.18 | Glass | 1.61 | 58.6 | 2.7 |
| 52 | -1.72 | 0 | |||||
| 61 | 6th lens | -1.72 | 0.50 | Glass | 1.70 | 30.1 | -2.2 |
| 62 | 22.25 | 0.10 | |||||
| 71 | 7th lens | 56.34 | 1.36 | Glass | 1.77 | 49.5 | 6.7 |
| 72 | -5.66 | 0.50 | |||||
| 8 | Plate glass | Plane | 0.30 | Glass | 1.52 | 64.2 | - |
| - | Plane | 3.12 | |||||
| 100 | Imaging surface | - | - |
Each aspherical parameter detailed data of this specific embodiment please refers to following table:
| Surface | 41 | 42 | 71 | 72 |
| K= | 0.09 | 10.22 | -200 | -20.9 |
| a4= | 8.04E-05 | 4.2E-03 | 4.4E-03 | -9.2E-3 |
| a6= | -4.0E-05 | -3.94E-03 | 2.0E-03 | 3.6E-3 |
| a8= | 2.05E-05 | 8.2E-03 | -4.0E-4 | -4.8E-5 |
| a10= | -3.16E-06 | -8.3E-03 | 9.7E-5 | 7.5E-5 |
| a12= | 2.22E-07 | 3.4E-03 | -1.1E-5 | -3.5E-6 |
The numerical value of each conditional expression of this specific embodiment please refers to Figure 16.
The MTF transfer curve figure of the 0.435-0.656um section of this specific embodiment is detailed in Fig. 7, the curvature of field and distortion figure
It is detailed in Fig. 8 (A) and Fig. 8 (B), chromatic longitudiinal aberration figure is detailed in Fig. 9, and 0.435-0.656um sections of defocusing curve figure is detailed in Figure 10.
In this specific embodiment, the focal length f=4.5mm of optical imaging lens；F-number FNO=2.8；Image planes size Ф=
8mm；Distance TTL=20.0mm of first lens 1 to the imaging surface 100 on optical axis I, CAR=33.2 ° of color difference of principal angle of incidence are
LCA=0.7um.
Embodiment three
As shown in figure 11, the present embodiment substantially phase identical as the face type bumps and refractive index of each lens of embodiment one
Together, only the image side surface 22 of the second lens 2 is concave surface, and the object side of the third lens 3 is convex surface, and the object side 51 of the 5th lens 5 is
Plane, the object side 71 of the 7th lens are convex surface and the aspherical system of the radius of curvature of each lens surface, lens thickness, lens
Several and system focal length optical parameter is different.
The detailed optical data of this specific embodiment are as shown in table 3-1.
The detailed optical data of table 3-1 embodiment three
| Surface | Radius of curvature | Thickness | Material | Refractive index | Abbe number | Focal length | |
| - | Object plane shot | Plane | Infinity | ||||
| 11 | First lens | 20.69 | 2.60 | Glass | 1.55 | 62.8 | -8.7 |
| 12 | 3.72 | 2.78 | |||||
| 21 | Second lens | -96.60 | 1.62 | Glass | 1.80 | 25.3 | -7.5 |
| 22 | 92.50 | 0 | |||||
| 31 | The third lens | 92.50 | 1.68 | Glass | 1.76 | 52.3 | 8.5 |
| 32 | -6.88 | 0.07 | |||||
| 41 | 4th lens | 3.67 | 3.67 | Glass | 1.83 | 37.3 | 6.5 |
| 42 | 6.12 | 0 | |||||
| 9 | Diaphragm | Plane | 0.22 | ||||
| 51 | 5th lens | Plane | 1.13 | Glass | 1.61 | 60.3 | 2.7 |
| 52 | -1.67 | 0 | |||||
| 61 | 6th lens | -1.67 | 0.50 | Glass | 1.70 | 30.1 | -2.2 |
| 62 | -22.85 | 0.07 | |||||
| 71 | 7th lens | 65.00 | 1.32 | Glass | 1.77 | 49.5 | 6.6 |
| 72 | -5.50 | 1.1 | |||||
| 8 | Plate glass | Plane | 0.30 | Glass | 1.52 | 64.2 | - |
| - | Plane | 2.43 | |||||
| 100 | Imaging surface | - | - |
Each aspherical parameter detailed data of this specific embodiment please refers to following table:
| Surface | 41 | 42 | 71 | 72 |
| K= | 0.088 | 10.22 | -200 | -20.9 |
| a4= | 8.51E-05 | 4.57E-03 | 4.75E-03 | -9.97E-3 |
| a6= | -4.73E-05 | -4.57E-03 | 2.32E-03 | 4.15E-3 |
| a8= | 2.49E-05 | 9.95E-03 | -4.91E-4 | -5.84E-5 |
| a10= | -4.10E-06 | -0.011 | 1.27E-5 | 9.69E-5 |
| a12= | 3.02E-07 | 4.68E-03 | -1.49E-5 | -4.99E-6 |
The numerical value of each conditional expression of this specific embodiment please refers to Figure 16.
The MTF transfer curve figure of the 0.435-0.656um section of this specific embodiment is detailed in Figure 12, the curvature of field and distortion figure
It is detailed in Figure 13 (A) and Figure 13 (B), chromatic longitudiinal aberration figure is detailed in Figure 14, and 0.435-0.656um sections of defocusing curve figure is detailed in Figure 15.
In this specific embodiment, the focal length f=4.4mm of optical imaging lens；F-number FNO=2.8；Image planes size Ф=
8mm；Distance TTL=19.5mm of first lens 1 to the imaging surface 100 on optical axis I, CAR=34 ° of principal angle of incidence, color difference is
LCA=1um.
The utility model uses seven lens, and by the refractive index and concave-convex curved surface arrangement design to each lens,
Good (optical transfer function can reach 250lp/mm, 4K image quality) with principal angle of incidence big (CRA >=33 °), resolving power, color difference is minimum
(435nm-656nm sections, color difference < 1um), optical distortion < 6% is (TTL≤20mm, outer diameter < 13mm) small in size, light-weight
The advantages of (weight < 5g).
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (10)
1. a kind of optical imaging lens, it is characterised in that: from object side to image side along an optical axis successively include the first lens, second thoroughly
Mirror, the third lens, the 4th lens, diaphragm, the 5th lens, the 6th lens and the 7th lens；First lens are each to the 7th lens
From including one towards object side and the object side for passing through imaging ray and one towards image side and the image side that passes through imaging ray
Face；
First lens have negative refractive index, and the object side of first lens is convex surface, and the image side surface of first lens is concave surface；
Second lens have negative refractive index, and the object side of second lens is concave surface；
The third lens have positive refractive index, and the image side surface of the third lens is convex surface；
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is concave surface；
5th lens have positive refractive index, and the image side surface of the 5th lens is convex surface；
6th lens have negative refractive index, and the object side of the 6th lens is concave surface；
7th lens have positive refractive index, and the image side surface of the 7th lens is convex surface, the object side of the 7th lens and image side surface
It is aspherical；
There are the optical imaging lens lens of refractive index there was only above-mentioned seven.
2. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: -3 < f1/f
< -1,15 < R1 <, 25,3 < R2 < 8, wherein f1 is the focal length of first lens, and f is the focal length of the optical imaging lens, R1
For the radius of curvature of the object side of first lens, R2 is the radius of curvature of the image side surface of first lens.
3. optical imaging lens according to claim 1, which is characterized in that the image side surface and the third lens of second lens
Object side it is mutually glued, and meet: Vd2≤30, Vd3 >=50, Vd3-Vd2 > 25, wherein Vd2 be second lens in d line
Abbe number, Vd3 be the third lens d line abbe number.
4. optical imaging lens according to claim 1, which is characterized in that the image side surface and the 6th lens of the 5th lens
Object side it is mutually glued, and meet: the , ∣ Vd6-Vd5 ∣ of Vd5 >=50, Vd6≤35 > 25, wherein Vd5 be the 5th lens in d
The abbe number of line, Vd6 are abbe number of the 6th lens in d line.
5. optical imaging lens according to claim 1, which is characterized in that the object side of the 4th lens and image side surface are equal
To be aspherical, and meet: Nd4 >=1.8, wherein Nd4 is refractive index of the 4th lens in d line.
6. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 0 < f7/f <
5, wherein f7 is the focal length of the 7th lens, and f is the focal length of the optical imaging lens.
7. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: T1 >
1.0,1.5 < T23 < 4.0,1.5 < T56 < 3.0, wherein T1 be the thickness of first lens on the optical axis, T23 be this second,
Thickness the sum of of the third lens on the optical axis, T56 are thickness the sum of of the five, the 6th lens on the optical axis.
8. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: ALT < 15,
ALG < 5, wherein ALG be the air gap summation of first lens to the 7th lens on the optical axis, ALT be this first thoroughly
The summation of seven lens thickness of the mirror to the 7th lens on the optical axis.
9. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: ALT/ALG
< 4.2, wherein ALG is the air gap summation of first lens to the 7th lens on the optical axis, and ALT is first lens
To the summation of seven lens thickness of the 7th lens on the optical axis.
10. optical imaging lens according to claim 1, it is characterised in that: the 4th lens and the 5th lens are closely set
It sets, eyeglass is directly born against, and diaphragm is realized using soma anti-dazzling screen.
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| CN201920389529.5U CN209496194U (en) | 2019-03-26 | 2019-03-26 | A kind of optical imaging lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839730A (en) * | 2019-03-26 | 2019-06-04 | 厦门力鼎光电股份有限公司 | A kind of optical imaging lens |
| CN117369094A (en) * | 2023-12-07 | 2024-01-09 | 联创电子科技股份有限公司 | Optical lens |
-
2019
- 2019-03-26 CN CN201920389529.5U patent/CN209496194U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839730A (en) * | 2019-03-26 | 2019-06-04 | 厦门力鼎光电股份有限公司 | A kind of optical imaging lens |
| CN109839730B (en) * | 2019-03-26 | 2023-07-25 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN117369094A (en) * | 2023-12-07 | 2024-01-09 | 联创电子科技股份有限公司 | Optical lens |
| CN117369094B (en) * | 2023-12-07 | 2024-03-19 | 联创电子科技股份有限公司 | Optical lens |
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