CN208596251U - Wide-angle optics and its camera module of application - Google Patents
Wide-angle optics and its camera module of application Download PDFInfo
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- CN208596251U CN208596251U CN201821179966.6U CN201821179966U CN208596251U CN 208596251 U CN208596251 U CN 208596251U CN 201821179966 U CN201821179966 U CN 201821179966U CN 208596251 U CN208596251 U CN 208596251U
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Abstract
The utility model embodiment discloses a kind of wide-angle optics, successively includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens from object plane to image planes along optical axis.On the other hand, the utility model embodiment additionally provides a kind of camera module.The optical system and camera module of the utility model embodiment are mainly made of 8 pieces of lens, and lens piece number is few, and structure is simple, and cost is reasonable；Using the intercombination of different lens and reasonable distribution focal power, there are the superperformances such as large aperture, big visual angle, high pixel and extraordinary athermal, be suitable for automobile assistant driving field.
Description
Technical field:
The utility model relates to a kind of optical system and its camera module of application, especially a kind of wide-angle optics and
Its camera module applied.
Background technique:
It is currently used for the backsight wide-angle optics of automobile assistant driving and its camera module of application, generally existing eyeglass
The problem of quantity is more, and structure is complicated.
Summary of the invention:
It is existing applied to the backsight wide-angle optics of automobile assistant driving and its camera module of application to overcome, generally
The problem of it is more that there are number of lenses, and structure is complicated, the utility model embodiment provide a kind of wide-angle optics.
A kind of wide-angle optics successively includes: that the first lens, the second lens, third are saturating from object plane to image planes along optical axis
Mirror, the 4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens；
The object plane side of first lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive or negative；
The object plane side of 4th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 6th lens is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of 7th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 8th lens is concave surface, and image planes side is convex surface, and focal power is positive or negative.
On the other hand, the utility model embodiment additionally provides a kind of camera module.
A kind of camera module includes at least optical lens, is equipped with wide-angle optics described above in optical lens.
The optical system and camera module of the utility model embodiment are mainly made of 8 pieces of lens, and lens piece number is few, knot
Structure is simple, and cost is reasonable；Using the intercombination of different lens and reasonable distribution focal power, there is large aperture, big visual angle, high picture
The superperformances such as element and extraordinary athermal, are suitable for automobile assistant driving field.
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 described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it 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 optical system of the utility model or the structural schematic diagram of camera module；
Fig. 2 is the distortion curve at the optical system of the utility model or+25 DEG C of camera module；
Fig. 3 is the MTF curve figure at the optical system of the utility model or+25 DEG C of camera module；
Fig. 4 is the relative illumination figure at the optical system of the utility model or+25 DEG C of camera module；
Fig. 5 is the MTF curve figure at the optical system of the utility model or -40 DEG C of camera module；
Fig. 6 is the MTF curve figure at the optical system of the utility model or+85 DEG C of camera module.
Specific embodiment:
The technical issues of in order to keep the utility model solved, technical solution and beneficial effect are more clearly understood, below
In conjunction with accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific implementation described herein
Example is only used to explain the utility model, is not used to limit the utility model.
When the utility model embodiment refers to the ordinal numbers such as " first ", " second ", unless based on context its certain table
Up to the meaning of sequence, it should be understood that only play differentiation and be used.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
The utility model embodiment provides a kind of wide-angle optics, as shown in Figure 1, a kind of wide-angle optics, edge
Optical axis successively includes: the first lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, from object plane to image planes
Six lens 6, the 7th lens 7 and the 8th lens 8.
The object plane side of first lens 1 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens 2 is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive or negative；
The object plane side of 4th lens 4 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens 5 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 6th lens 6 is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of 7th lens 7 is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 8th lens 8 is concave surface, and image planes side is convex surface, and focal power is positive or negative.
The optical system of the utility model embodiment is mainly made of 8 pieces of lens, and lens piece number is few, and structure is simple, cost
Rationally；It is combined with each other using different lens and reasonable distribution focal power, there is large aperture, big visual angle, high pixel and very good
The superperformances such as athermal, be suitable for automobile assistant driving field.
Further, non-limiting as the preferred embodiment of this programme, optical system meets: TTL/EFL≤
11.25, wherein TTL is the 1 object plane side vertex of the first lens of optical system the distance between to imaging surface 10, and EFL is optical system
The effective focal length of system.Using different lens be combined with each other and reasonable distribution focal power, have large aperture, big visual angle, high pixel, with
And the superperformances such as extraordinary athermal.
Still further, non-limiting as the preferred embodiment of this programme, the 5th lens 5 and the 6th lens 6 are mutually
Gluing forms compound lens, and the focal length f56 of compound lens meets: -100 < f56 < -10.It is simple and compact for structure, using different lens
Intercombination and reasonable distribution focal power have the formedness such as large aperture, big visual angle, high pixel and extraordinary athermal
Energy
Further, non-limiting as the specific embodiment of this programme, each lens of optical system meet as follows
Condition:
(1)-30<f1<-5；
(2)-50<f2<-10；
(3)-500<f3<500；
(4)5<f4<15；
(5)3<f5<10；
(6)-10<f6<-2；
(7)2<f7<12；
(8)-50<f8<50；
Wherein, f1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, and f3 is the focal length of the third lens 3, and f4 is
The focal length of 4th lens 4, f5 are the focal length of the 5th lens 5, and f6 is the focal length of the 6th lens 6, and f7 is the focal length of the 7th lens 7,
F8 is the focal length of the 8th lens 8.By the intercombination and its reasonable distribution focal power of different lens, there is optical system big
The superperformances such as aperture, big visual angle, high pixel and extraordinary athermal.
Still further, non-limiting as the preferred embodiment of this programme, each lens of optical system meet as follows
Condition:
(1)-12<f1/f<-2；
(2)-15<f2/f<-2；
(3)-200<f3/f<200；
(4)1.5<f4/f<10；
(5)1.5<f5/f<10；
(6)-5.5<f6/f<-0.8；
(7)1.5<f7/f<10；
(8)-15<f8/f<15；
Wherein, f is the focal length of entire optical system, and f1 is the focal length of the first lens 1, and f2 is the focal length of the second lens 2, f3
For the focal length of the third lens 3, f4 is the focal length of the 4th lens 4, and f5 is the focal length of the 5th lens 5, and f6 is the coke of the 6th lens 6
Away from f7 is the focal length of the 7th lens 7, and f8 is the focal length of the 8th lens 8.Pass through the intercombination and its reasonable distribution of different lens
Focal power makes optical system have the superperformances such as large aperture, big visual angle, high pixel and extraordinary athermal.
Further, non-limiting as the specific embodiment of this programme, the Refractive Index of Material Nd1 of the first lens 1,
Material Abbe constant Vd1 meets: 1.68 < Nd1 < 1.95,30 < Vd1 < 60；The focal length f1 of first lens 1 meets: -12 < f1/f < -
2, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Further, non-limiting as the specific embodiment of this programme, the Refractive Index of Material Nd2 of the second lens 2,
Material Abbe constant Vd2 meets: 1.45 < Nd2 < 1.65,40 < Vd2 < 60；The focal length f2 of second lens 2 meets: -15 < f2/f < -
2, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Still further, as the specific embodiment of this programme and it is non-limiting, the Refractive Index of Material Nd3 of the third lens 3,
Material Abbe constant Vd3 meets: 1.72 < Nd3 < 1.92,15 < Vd3 < 35；The focal length f3 of the third lens 3 meets: -200 < f3/f <
200, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Further, non-limiting as the specific embodiment of this programme, the Refractive Index of Material Nd4 of the 4th lens 4,
Material Abbe constant Vd4 meets: 1.65 < Nd4 < 1.85,35 < Vd4 < 55；The focal length f4 of 4th lens 4 meets: 1.5 < f4/f <
10, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Further, non-limiting as the specific embodiment of this programme, the Refractive Index of Material Nd5 of the 5th lens 5,
Material Abbe constant Vd5 meets: 1.45 < Nd5 < 1.65,50 < Vd5 < 85；The focal length f5 of 5th lens 5 meets: 1.5 < f5/f <
10, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Still further, as the specific embodiment of this programme and it is non-limiting, the Refractive Index of Material Nd6 of the 6th lens 6,
Material Abbe constant Vd6 meets: 1.75 < Nd6 < 1.95,17 < Vd6 < 35；The focal length f6 of 6th lens 6 meets: -5.5 < f6/f < -
0.8, f is the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Further, non-limiting as the specific embodiment of this programme, the Refractive Index of Material Nd7 of the 7th lens 7,
Material Abbe constant Vd7 meets: 1.55 < Nd7 < 1.65,40 < Vd7 < 60；The focal length f7 of 7th lens 7 meets: 1.5 < f7/f <
10, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Still further, as the specific embodiment of this programme and it is non-limiting, the Refractive Index of Material Nd8 of the 8th lens 8,
Material Abbe constant Vd8 meets: 1.55 < Nd8 < 1.65,40 < Vd8 < 60；The focal length f8 of 8th lens 8 meets: -15 < f8/f <
15, f be the focal length of entire optical system.Structure is simple, it is ensured that good optical property.
Further, non-limiting as the specific embodiment of this programme, the second lens 2, the 7th lens 7 and
8th lens 8 are non-spherical lens.Structure is simple, and the parsing power of optical lens can be improved, can effectively realize athermal,
The difficulty of processing and production cost of camera lens are reduced simultaneously.
Further, non-limiting as the specific embodiment of this programme, it is saturating that the diaphragm 9 of optical system is located at third
Between mirror 3 and the 4th lens 4.Structure is simple, for adjusting the intensity of light beam.Preferably, diaphragm setting is close in the 4th lens 4
Image side, in the present embodiment, the position of each lens and diaphragm are fixed.
Still further, as the specific embodiment of this programme and it is non-limiting, be equipped between the 8th lens 8 and image planes 10
Bandpass filter.Structure is simple, may filter that the infrared light in environment, generates red aeration phenomenon to avoid image.
Specifically, in conjunction with Fig. 1, in the present embodiment, the focal length f of this optical system is 3.417mm, stop index F No.
It is 2.0,2 ω=170 ° of field angle, focal length f1=-14.5mm, the focal length f2=-34.3mm of the second lens 2 of the first lens 1,
Focal length f3=-315mm, the focal length f4=9.5mm of the 4th lens 4, the focal length f5=7.4mm of the 5th lens 5 of the third lens 3,
The focal length f6=-4.1mm of 6th lens 6, the focal length f7=7.8mm of the 7th lens 7, the focal length f8=-25mm of the 8th lens 8.
Every basic parameter of this optical system is as shown in the table:
In upper table, along optical axis 10 from object plane to image planes, S1, S2 correspond to two surfaces of the first lens 1；S3, S4 are corresponding
For two surfaces of the second lens 2；S5, S6 correspond to two surfaces of the third lens 3；S7 is diaphragm STO；S8, S9 are corresponded to
Two surfaces of the 4th lens 4；S10, S11 correspond to two surfaces of the 5th lens 5；S11, S12 correspond to the 6th lens 6
Two surfaces；S13, S14 correspond to two surfaces of the 7th lens 7；S15, S16 correspond to two surfaces of the 8th lens 8；
S17, S18 correspond to two surfaces of bandpass filter；IMA is image planes 10.
More specifically, the surface of second lens 2, the 7th lens 7 and the 8th lens 8 is aspherical shape, expire
Sufficient following equation: Wherein, parameter
C=1/R, as curvature corresponding to radius, y are radial coordinate, and unit is identical with length of lens unit, and k is that circular cone is secondary
Curve coefficients, a1To a5Coefficient corresponding to respectively each radial coordinate.The surface S3 and the surface S4, third of second lens 2
The aspherical correlation values such as following table institute on the surface S15 and the surface S16 on the surface the S5 and surface S6 and the 8th lens 8 of lens 3
Show:
As can be seen that the optical system in the present embodiment has high-resolution and extraordinary athermal in from Fig. 2 to Fig. 6
Performance.
A kind of camera module includes at least optical lens, is equipped with wide-angle optics described above in optical lens.
The camera module of the utility model embodiment is mainly made of 8 pieces of lens, and lens piece number is few, and structure is simple, cost
Rationally；It is combined with each other using different lens and reasonable distribution focal power, there is large aperture, big visual angle, high pixel and very good
The superperformances such as athermal, be suitable for automobile assistant driving field.
It is the one or more embodiments provided in conjunction with particular content as described above, does not assert the tool of the utility model
Body implementation is only limited to these instructions.It is all approximate with the method for the utility model, structure etc., identical or practical new for this
Several technology deduction or replace are made under type concept thereof, all should be considered as the protection scope of the utility model.
Claims (10)
1. a kind of wide-angle optics, along optical axis successively include: from object plane to image planes the first lens, the second lens, the third lens,
4th lens, the 5th lens, the 6th lens, the 7th lens and the 8th lens；It is characterized in that,
The object plane side of first lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of second lens is convex surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive or negative；
The object plane side of 4th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 5th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 6th lens is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of 7th lens is convex surface, and image planes side is convex surface, and focal power is positive；
The object plane side of 8th lens is concave surface, and image planes side is convex surface, and focal power is positive or negative.
2. wide-angle optics as described in claim 1, which is characterized in that optical system meets: TTL/EFL≤11.25,
Middle TTL is the first lens object plane side vertex of optical system the distance between to imaging surface, and EFL is effective coke of optical system
Away from.
3. wide-angle optics as claimed in claim 1 or 2, which is characterized in that the 5th lens and the 6th lens are mutually glued
Compound lens is formed, the focal length f56 of compound lens meets: -100 < f56 < -10.
4. wide-angle optics as claimed in claim 1 or 2, which is characterized in that each lens of optical system meet following item
Part:
(1)-30<f1<-5；
(2)-50<f2<-10；
(3)-500<f3<500；
(4)5<f4<15；
(5)3<f5<10；
(6)-10<f6<-2；
(7)2<f7<12；
(8)-50<f8<50；
Wherein, f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is the focal length of the third lens, and f4 is the 4th saturating
The focal length of mirror, f5 are the focal length of the 5th lens, and f6 is the focal length of the 6th lens, and f7 is the focal length of the 7th lens, and f8 is the 8th saturating
The focal length of mirror.
5. wide-angle optics as claimed in claim 1 or 2, which is characterized in that each lens of optical system meet following item
Part:
(1)-12<f1/f<-2；
(2)-15<f2/f<-2；
(3)-200<f3/f<200；
(4)1.5<f4/f<10；
(5)1.5<f5/f<10；
(6)-5.5<f6/f<-0.8；
(7)1.5<f7/f<10；
(8)-15<f8/f<15；
Wherein, f is the focal length of entire optical system, and f1 is the focal length of the first lens, and f2 is the focal length of the second lens, and f3 is third
The focal length of lens, f4 are the focal length of the 4th lens, and f5 is the focal length of the 5th lens, and f6 is the focal length of the 6th lens, and f7 is the 7th
The focal length of lens, f8 are the focal length of the 8th lens.
6. wide-angle optics as claimed in claim 1 or 2, which is characterized in that Refractive Index of Material Nd1, the material of the first lens
Expect that Abbe constant Vd1 meets: 1.68 < Nd1 < 1.95,30 < Vd1 < 60；The focal length f1 of first lens meets: -12 < f1/f < -2, f
For the focal length of entire optical system.
7. wide-angle optics as claimed in claim 1 or 2, which is characterized in that Refractive Index of Material Nd2, the material of the second lens
Expect that Abbe constant Vd2 meets: 1.45 < Nd2 < 1.65,40 < Vd2 < 60；The focal length f2 of second lens meets: -15 < f2/f < -2, f
For the focal length of entire optical system.
8. wide-angle optics as claimed in claim 1 or 2, which is characterized in that Refractive Index of Material Nd3, the material of the third lens
Expect that Abbe constant Vd3 meets: 1.72 < Nd3 < 1.92,15 < Vd3 < 35；The focal length f3 of the third lens meets: -200 < f3/f < 200,
F is the focal length of entire optical system.
9. wide-angle optics as claimed in claim 1 or 2, which is characterized in that Refractive Index of Material Nd4, the material of the 4th lens
Expect that Abbe constant Vd4 meets: 1.65 < Nd4 < 1.85,35 < Vd4 < 55；The focal length f4 of 4th lens meets: 1.5 < f4/f < 10, f
For the focal length of entire optical system.
10. a kind of camera module includes at least optical lens, which is characterized in that be equipped with claim 1-9 in optical lens and appoint
Wide-angle optics described in one.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021082223A1 (en) * | 2019-10-30 | 2021-05-06 | 广东弘景光电科技股份有限公司 | High-pixel infrared optical system and applied camera module thereof |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021082223A1 (en) * | 2019-10-30 | 2021-05-06 | 广东弘景光电科技股份有限公司 | High-pixel infrared optical system and applied camera module thereof |
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