CN109683281A

CN109683281A - Sampling image lens group and image-taking device

Info

Publication number: CN109683281A
Application number: CN201910042131.9A
Authority: CN
Inventors: 廖凌峣; 黄歆璇
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2015-02-17
Filing date: 2015-02-17
Publication date: 2019-04-26
Anticipated expiration: 2035-02-17
Also published as: CN109856786A; CN105988198B; CN109683281B; CN109856786B; CN105988198A

Abstract

The invention discloses a kind of sampling image lens group and image-taking devices.Sampling image lens group sequentially includes the first lens, the second lens, the third lens, the 4th lens and the 5th lens by object side to image side.First lens have positive refracting power, and the first lens object side surface is convex surface, and the 4th lens have negative refracting power, and the 5th lens object side surface and image side surface are all aspherical.When a specific condition is satisfied, sampling image lens group volume can be effectively controlled, to promote carrying convenience.Invention additionally discloses the image-taking devices with above-mentioned sampling image lens group.

Description

Sampling image lens group and image-taking device

The application be the applying date be on February 17th, 2015, application No. is 201510085564.4, entitled " captures The divisional application of the patent application of lens group, image-taking device and electronic device ".

Technical field

The invention relates to a kind of sampling image lens group and image-taking devices, and fill in particular to a kind of apply in electronics The miniaturization sampling image lens group and image-taking device set.

Background technique

In recent years, with the rise of the electronic product with camera function, the demand of optical system is increasingly improved.General light The photosensitive element of system is nothing more than being photosensitive coupling element (Charge Coupled Device, CCD) or complementary gold oxide Belong to two kinds of semiconductor element (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), And progressing greatly with manufacture of semiconductor technology, so that the Pixel Dimensions of photosensitive element reduce, optical system is gradually led toward high pixel Domain development, therefore the requirement to image quality also increasingly increases.

Tradition is equipped on the optical system on electronic product and mostly uses based on four or five chip lens arrangements, but due to intelligence Prevailing, the drive optical system of the high standards mobile device such as energy mobile phone (Smart Phone) and tablet computer (Tablet PC) Rapid on pixel and image quality rises, it is known that optical system will be unable to the camera chain for meeting higher order.

By taking five chip optical systems of vista shot (Telephoto) as an example, spherical glass lens of arranging in pairs or groups more, however, Such configuration not only causes camera lens volume excessive without portable, meanwhile, the excessively high stepping back for also making consumer's prestige of production unit cost, because This known optical system has been unable to satisfy current ordinary consumer and has pursued the convenient photography demand with multifunctionality.

Summary of the invention

The present invention provides a kind of sampling image lens group and image-taking device, and the first lens of sampling image lens group have positive flexion The light aggregate capabilities of sampling image lens group entirety can be concentrated on its object side, sampling image lens group can be effectively controlled whereby by power Volume, to promote the convenience carried.In addition, the 4th lens of sampling image lens group have negative refracting power, image capture lens can be made whereby The back focal length of sampling image lens group can be effectively controlled far from its image side end in the principal point (Principal Point) of head group, is conducive to Maintain micromation.

A kind of sampling image lens group is provided according to the present invention, sequentially includes the first lens, the second lens, by object side to image side Three lens, the 4th lens and the 5th lens.First lens have positive refracting power, the first lens object side surface be convex surface, the 4th Lens have negative refracting power, and the 5th lens object side surface and image side surface are all aspherical.The lens sum of sampling image lens group is Five.An at least lens include an at least contrary flexure in first lens, the second lens, the third lens, the 4th lens and the 5th lens Point.The focal length of sampling image lens group is f, and the focal length of the first lens is f1, and the focal length of the 4th lens is f4, the first lens object side surface Radius of curvature be R1, the radius of curvature on the first lens image side surface is R2, the first lens on optical axis with a thickness of CT1, the One lens object side surface is TL in the distance on optical axis to imaging surface, and the third lens and the 4th lens are in the spacing distance on optical axis For T34, the 4th lens and the 5th lens are T45 in the spacing distance on optical axis, meet following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；

3.4<f/R1；

0.75<TL/f<1.0；And

T34/T45<1.2。

A kind of image-taking device is separately provided according to the present invention, include sampling image lens group above-mentioned and electronics photosensitive element, Middle electronics photosensitive element is set to the imaging surface of sampling image lens group.

According to the present invention again a kind of sampling image lens group is provided, by object side to image side sequentially include the first lens, the second lens, The third lens, the 4th lens and the 5th lens.First lens have positive refracting power, and the first lens object side surface is convex surface, the Four lens have negative refracting power, and the 5th lens object side surface and image side surface are all aspherical.The lens sum of sampling image lens group It is five.An at least lens include at least one anti-in first lens, the second lens, the third lens, the 4th lens and the 5th lens Qu Dian.The focal length of sampling image lens group is f, and the focal length of the first lens is f1, and the focal length of the 4th lens is f4, the first lens object side table The radius of curvature in face is R1, the radius of curvature on the first lens image side surface is R2, the first lens on optical axis with a thickness of CT1, First lens object side surface is TL in the distance on optical axis to imaging surface, and the third lens and the 4th lens are in the interval distance on optical axis From in the spacing distance on optical axis being T45 for T34, the 4th lens and the 5th lens, the refractive index of the first lens is N1, and second thoroughly The refractive index of mirror is N2, and the refractive index of the third lens is N3, and the refractive index of the 4th lens is N4, and the refractive index of the 5th lens is The maximum is Nmax in N5, N1, N2, N3, N4 and N5, meets following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；

3.4<f/R1；

0.75<TL/f<1.0；

T34/T45<1.2；And

1.50<Nmax<1.70。

When (f/R1)-(f/R2)+((f × CT1)/(R1 × R2)) meets above-mentioned condition, sampling image lens can be balanced simultaneously Relationship between group entirety and the surface shape and thickness of the first lens makes the first lens play maximum efficiency, and then controls photography Range, to reach optimal vista shot quality.

When f1/f4 meets above-mentioned condition, the deflection of light degree of sampling image lens group object side can be strengthened, it can be in the confined space It is interior, lens ratio is promoted, same image range is made to can receive more light.

When f/R1 meets above-mentioned condition, camera coverage can be effectively controlled, have the image quality of local image higher Resolution.

When TL/f meets above-mentioned condition, the space configuration of lens can be effectively controlled, and promote the ability of vista shot.

When T34/T45 meets above-mentioned condition, collocation between the third lens and the 4th lens can be helped more closely, to hand over Aberration is mutually cut down, while possessing enough balance spaces between the 5th lens.

When Nmax meets above-mentioned condition, refractive index configuration appropriate can reduce color difference, help to promote image quality.

Detailed description of the invention

Fig. 1 is painted a kind of schematic diagram of image-taking device according to first embodiment of the invention；

Fig. 2 is sequentially spherical aberration, astigmatism and the distortion curve graph of first embodiment from left to right；

Fig. 3 is painted a kind of schematic diagram of image-taking device according to second embodiment of the invention；

Fig. 4 is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right；

Fig. 5 is painted a kind of schematic diagram of image-taking device according to third embodiment of the invention；

Fig. 6 is sequentially spherical aberration, astigmatism and the distortion curve graph of 3rd embodiment from left to right；

Fig. 7 is painted a kind of schematic diagram of image-taking device according to fourth embodiment of the invention；

Fig. 8 is sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right；

Fig. 9 is painted a kind of schematic diagram of image-taking device according to fifth embodiment of the invention；

Figure 10 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right；

Figure 11 is painted a kind of schematic diagram of image-taking device according to sixth embodiment of the invention；

Figure 12 is sequentially spherical aberration, astigmatism and the distortion curve graph of sixth embodiment from left to right；

Figure 13 is painted a kind of schematic diagram of image-taking device according to seventh embodiment of the invention；

Figure 14 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right；

Figure 15 is painted a kind of schematic diagram of image-taking device according to eighth embodiment of the invention；

Figure 16 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 8th embodiment from left to right；

Figure 17 is painted a kind of schematic diagram of image-taking device according to ninth embodiment of the invention；

Figure 18 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 9th embodiment from left to right；

Figure 19 is painted a kind of schematic diagram of image-taking device according to tenth embodiment of the invention；

Figure 20 is sequentially spherical aberration, astigmatism and the distortion curve graph of the tenth embodiment from left to right；

Figure 21 is painted a kind of schematic diagram of image-taking device according to eleventh embodiment of the invention；

Figure 22 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 11st embodiment from left to right；

Figure 23 is painted a kind of schematic diagram of image-taking device according to twelveth embodiment of the invention；

Figure 24 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 12nd embodiment from left to right；

Figure 25 is painted a kind of schematic diagram of image-taking device according to thriteenth embodiment of the invention；

Figure 26 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 13rd embodiment from left to right；

Figure 27 is painted the signal according to sampling image lens group in Fig. 1 first embodiment and object and its imaging surface setting relationship Figure；

Figure 28 is painted to be set according to sampling image lens group in Fig. 1 first embodiment and prism, object and its imaging surface another kind Set the schematic diagram of relationship；

Figure 29 is painted a kind of schematic diagram of electronic device according to fourteenth embodiment of the invention；

Figure 30 is painted a kind of schematic diagram of electronic device according to fifteenth embodiment of the invention；And

Figure 31 is painted a kind of schematic diagram of electronic device according to sixteenth embodiment of the invention.

[symbol description]

Electronic device: 10,20,30

Image-taking device: 11,21,31

Aperture: 100,200,300,400,500,600,700,800,900,1000,1100,1200,1300

Diaphragm: 1001

First lens: 110,210,310,410,510,610,710,810,910,1010,1110,1210,1310

Object side surface: 111,211,311,411,511,611,711,811,911,1011,1111,1211,1311

Image side surface: 112,212,312,412,512,612,712,812,912,1012,1112,1212,1312

Second lens: 120,220,320,420,520,620,720,820,920,1020,1120,1220,1320

Object side surface: 121,221,321,421,521,621,721,821,921,1021,1121,1221,1321

Image side surface: 122,222,322,422,522,622,722,822,922,1022,1122,1222,1322

The third lens: 130,230,330,430,530,630,730,830,930,1030,1130,1230,1330

Object side surface: 131,231,331,431,531,631,731,831,931,1031,1131,1231,1331

Image side surface: 132,232,332,432,532,632,732,832,932,1032,1132,1232,1332

4th lens: 140,240,340,440,540,640,740,840,940,1040,1140,1240,1340

Object side surface: 141,241,341,441,541,641,741,841,941,1041,1141,1241,1341

Image side surface: 142,242,342,442,542,642,742,842,942,1042,1142,1242,1342

5th lens: 150,250,350,450,550,650,750,850,950,1050,1150,1250,1350

Object side surface: 151,251,351,451,551,651,751,851,951,1051,1151,1251,1351

Image side surface: 152,252,352,452,552,652,752,852,952,1052,1152,1252,1352

Infrared ray filters out filter element: 160,260,360,460,560,660,760,860,960,1060,1160, 1260、1360

Imaging surface: 170,270,370,470,570,670,770,870,970,1070,1170,1270,1370

Electronics photosensitive element: 180,280,380,480,580,680,780,880,980,1080,1180,1280,1380

O: object

L: sampling image lens group

P: prism

F: the focal length of sampling image lens group

Fno: the f-number of sampling image lens group

HFOV: the half at maximum visual angle in sampling image lens group

The refractive index of N1: the first lens

The refractive index of N2: the second lens

N3: the refractive index of the third lens

The refractive index of N4: the four lens

The refractive index of N5: the five lens

The maximum in Nmax:N1, N2, N3, N4 and N5

The abbe number of V4: the four lens

The abbe number of V5: the five lens

T12: the first lens and the second lens are in the spacing distance on optical axis

T23: the second lens and the third lens are in the spacing distance on optical axis

T34: the third lens and the 4th lens are in the spacing distance on optical axis

T45: the four lens and the 5th lens are in the spacing distance on optical axis

The radius of curvature of R1: the first lens object side surface

The radius of curvature of R2: the first lens image side surface

The radius of curvature of R8: the four lens image side surface

The radius of curvature of R9: the five lens object side surface

The focal length of f1: the first lens

The focal length of f4: the four lens

The focal length of f5: the five lens

The synthesis focal length of f12: the first lens and the second lens

The synthesis focal length of f45: the four lens and the 5th lens

CT1: the first lens are in the thickness on optical axis

SD: aperture to the 5th lens image side surface is in the distance on optical axis

TD: the first lens object side surface to the 5th lens image side surface is in the distance on optical axis

ImgH: the maximum image height of sampling image lens group

EPD: the entrance pupil diameter of sampling image lens group

TL: the first lens object side surface is to imaging surface in the distance on optical axis

Specific embodiment

A kind of sampling image lens group is provided, sequentially includes the first lens, the second lens, the third lens, by object side to image side Four lens and the 5th lens, it is five that wherein sampling image lens group, which has the lens sum of refracting power,.

The first lens, the second lens, the third lens, the 4th lens and the 5th lens of sampling image lens group described in leading portion In, appoint two adjacent lens between on optical axis all have an airspace, that is to say, that sampling image lens group have five it is single non- The lens of bonding.Since the more non-adhering lens of the processing procedure of cemented lens are complicated, Gao Zhun especially need to be possessed in the adhesive surface of two lens The curved surface of degree, to reach the high adaptation when bonding of two lens, and during bonding, it is also possible to be caused because of deviation close It is right bad, influence whole optical imagery quality.Therefore, in sampling image lens group of the present invention, appoint two adjacent with refracting power The problem that there is an airspace between lens, cemented lens can be effectively improved.

First lens have positive refracting power, and object side surface is convex surface, and image side surface can be that convex surface can will take whereby As the light aggregate capabilities of lens group entirety concentrate on its object side, and the volume of sampling image lens group can be effectively controlled, to be promoted The convenience of carrying.

Second lens can have negative refracting power.Whereby, the aberration of sampling image lens group can be corrected, to promote image quality.

The third lens can have positive refracting power, and image side surface can be convex surface.Whereby, the positive flexion of sampling image lens group can be balanced The distribution of power reduces its susceptibility.

4th lens have negative refracting power, and object side surface can be concave surface, and image side surface can be concave surface.Whereby, can make The back focal length of sampling image lens group can be effectively controlled far from its image side end in the principal point of sampling image lens group, is conducive to maintain micromation, And can reinforce correcting the aberration of sampling image lens group, to promote image quality.

5th lens have negative refracting power, and object side surface can be concave surface, and image side surface can be convex surface.Whereby, can make The back focal length of sampling image lens group can be effectively controlled far from its image side end in the principal point of sampling image lens group, is conducive to maintain micromation, And the astigmatism of sampling image lens group can be corrected, to promote image quality.

The focal length of sampling image lens group is f, and the radius of curvature of the first lens object side surface is R1, the first lens image side surface Radius of curvature is R2, and the first lens are in, with a thickness of CT1, meeting following condition: 3.4 < (f/R1)-(f/R2)+((f on optical axis ×CT1)/(R1×R2))<7.5.Whereby, the whole surface shape and thickness with the first lens of sampling image lens group can be balanced simultaneously Between relationship, make the first lens play maximum efficiency, and then control camera coverage, to reach optimal vista shot quality.Compared with Goodly, following condition: 3.7 < (f/R1)-(f/R2)+((f × CT1)/(R1 × R2)) < 6.0 can be met.

The focal length of first lens is f1, and the focal length of the 4th lens is f4, meets following condition: -1.0 < f1/f4 < 0.It borrows This, can strengthen the deflection of light degree of sampling image lens group object side, can promote lens ratio in a limited space, make same image Range can receive more light.

The focal length of sampling image lens group is f, and the radius of curvature of the first lens object side surface is R1, meets following condition: 3.4 <f/R1.Whereby, camera coverage can be effectively controlled, the image quality of local image is made to have higher resolution.

Sampling image lens group can also include an aperture, and aperture may be disposed between the first lens and the third lens.Aperture is to the 5th Lens image side surface is SD in the distance on optical axis, the first lens object side surface to the 5th lens image side surface on optical axis away from From for TD, following condition: 0.65 < SD/TD < 1.0 can be met.Whereby, be conducive to sampling image lens group in telecentricity characteristic and wide view Balance is obtained in the characteristic of rink corner.Preferably, it can meet following condition: 0.65 < SD/TD < 0.87.

The radius of curvature of 4th lens image side surface is R8, and the radius of curvature of the 5th lens object side surface is R9, can be expired Foot column condition: -0.1 < (R8+R9)/(R8-R9).Whereby, it can control the airspace between the 4th lens and the 5th lens, into And regulate and control the deflection of light between the 4th lens and the 5th lens, to balance paraxial and off-axis light beam aggregate capabilities.

The radius of curvature of first lens object side surface is R1, and the radius of curvature on the first lens image side surface is R2, can be expired Foot column condition: -1.5 < (R1+R2)/(R1-R2) < 0.Whereby, the generation of spherical aberration and astigmatism is advantageously reduced to promote imaging product Matter, and have control camera coverage to reach optimal vista shot quality.

The refractive index of first lens is N1, and the refractive index of the second lens is N2, and the refractive index of the third lens is N3, and the 4th thoroughly The refractive index of mirror is N4, and the refractive index of the 5th lens is N5, and the maximum is Nmax in N1, N2, N3, N4 and N5, under can meeting Column condition: 1.50 < Nmax < 1.70.Whereby, refractive index configuration appropriate can reduce color difference, help to promote image quality.

An at least lens can have positive flexion in first lens, the second lens, the third lens, the 4th lens and the 5th lens Power, and this abbe number with positive refracting power lens is less than 30.Whereby, the distribution of the positive refracting power of sampling image lens group can be balanced, Its susceptibility is reduced, and corrects its color difference.

First lens and the second lens are T12 in the spacing distance on optical axis, and the second lens and the third lens are on optical axis Spacing distance be T23, the third lens and the 4th lens are T34, the 4th lens and the 5th lens in the spacing distance on optical axis It is T45 in the spacing distance on optical axis, T45 can be greater than T12, T23 and T34.Whereby, sampling image lens group is made to have enough spaces Optical path is mitigated, while helping increase image height.

The focal length of sampling image lens group is f, and the maximum image height of sampling image lens group is that (that is, electronics photosensitive element is effective by ImgH The half of sensing region diagonal line length), following condition: 2.3 < f/ImgH < 6.0 can be met.Whereby, image capture lens can be effectively controlled Head group volume, maintains the miniaturization of sampling image lens group and promotes carrying convenience.

The entrance pupil diameter of sampling image lens group is EPD, and the maximum image height of sampling image lens group is ImgH, can meet following item Part: 0.7 < EPD/ImgH < 2.0.Whereby, the light-inletting quantity of sampling image lens group can be increased to obtain higher resolving power.

An at least lens may include at least one in first lens, the second lens, the third lens, the 4th lens and the 5th lens The point of inflexion.Whereby, facilitate the aberration of modified off-axis visual field to promote surrounding image quality.

The focal length of sampling image lens group is f, and the first lens object side surface to imaging surface is TL in the distance on optical axis, can be expired Foot column condition: 0.75 < TL/f < 1.0.Whereby, the space configuration of lens can be effectively controlled, and promote the ability of vista shot.

First lens object side surface is TL in the distance on optical axis to imaging surface, can meet following condition: TL < 7.5mm. Whereby, be conducive to maintain the miniaturization of sampling image lens group.

First lens, the second lens, the third lens, the 4th lens and the 5th lens refracting power in, the first lens are bent It can be most strong for rolling over power.(size of the strong and weak net amount value for refracting power of refracting power is relatively as a result, strong refracting power indicates net Numerical value is larger, and weak refracting power indicates that net amount value is smaller).Whereby, the aggregate capabilities that can strengthen the first lens help to shorten capture The overall length of lens group.

The focal length of 4th lens is f4, and the focal length of the 5th lens is f5, can meet following condition: 0 < f4/f5.Whereby, The principal point of sampling image lens group can be made far from its image side end, and the back focal length of sampling image lens group can be effectively controlled, be conducive to remain micro- Type.

The third lens are T34 in the spacing distance on optical axis with the 4th lens, and the 4th lens and the 5th lens are on optical axis Spacing distance be T45, following condition: T34/T45 < 1.2 can be met.Whereby, it can help between the third lens and the 4th lens Collocation more closely, aberration is cut down with interaction, while possessing enough balance spaces between the 5th lens.

First lens object side surface is TL in the distance on optical axis to imaging surface, and the maximum image height of sampling image lens group is ImgH can meet following condition: 2.0 < TL/ImgH < 3.5.Whereby, it can effectively shorten the total length of sampling image lens group, maintain It is minimized.

The abbe number of 4th lens is V4, and the abbe number of the 5th lens is V5, can meet following condition: 90 < V4+ V5<130.Whereby, facilitate the amendment of sampling image lens group color difference.

The half at maximum visual angle is HFOV in sampling image lens group, can meet following condition: 0.3 < tan (2 × HFOV) < 1.1.Whereby, can have field angle and imaging range appropriate, and reduce the influence of stray light.

The synthesis focal length of first lens and the second lens is f12, and the synthesis focal length of the 4th lens and the 5th lens is f45, It can meet following condition: -2.0 < f12/f45 < 0.Whereby, the telescope optical system just born afterwards before contributing to form, makes distant view Photography can clearly be imaged.

In sampling image lens group provided by the invention, the material of lens can be plastic cement or glass.When lens material be plastic cement, Production cost can be effectively reduced.It is another when the material of lens is glass, then can increase the configuration of sampling image lens group refracting power from By spending.In addition, the object side surface and image side surface in sampling image lens group can be aspherical (ASP), it is aspherical to be easy to make At the shape other than spherical surface, more controlled variable is obtained, to cut down aberration, and then reduces the number that lens use, therefore The total length of sampling image lens group of the present invention can be effectively reduced.

Furthermore in sampling image lens group provided by the invention, if lens surface is convex surface and does not define the convex surface position, Indicate that the lens surface is convex surface at dipped beam axis；If lens surface is concave surface and does not define the concave surface position, then it represents that should Lens surface is concave surface at dipped beam axis.In sampling image lens group provided by the invention, if lens have positive refracting power or negative flexion The focal length of power or lens all refers to refracting power or focal length at lens dipped beam axis.

The imaging surface of sampling image lens group of the invention, according to the difference of its corresponding electronics photosensitive element, can be a flat surface or There is the curved surface of any curvature, particularly relates to concave surface towards the curved surface toward object side direction.

In addition, an at least diaphragm settable on demand helps to mention in sampling image lens group of the present invention to reduce stray light Rise image quality.

In sampling image lens group of the invention, aperture configuration can for preposition aperture or in set aperture, wherein preposition aperture implies that Aperture is set between object and the first lens, in set aperture then and indicate that aperture is set between the first lens and imaging surface.If light Circle is preposition aperture, and the outgoing pupil (Exit Pupil) of sampling image lens group and imaging surface can be made to generate longer distance, make its tool The CCD or CMOS for having telecentricity (Telecentric) effect, and can increasing electronics photosensitive element receive the efficiency of image；If in Aperture is set, the field angle of expansion system is facilitated, makes sampling image lens group that there is the advantage of wide-angle lens.

The more visual demand of sampling image lens group of the invention is applied in the optical system of mobile focusing, and has both excellent aberration The characteristic of amendment and good image quality.The present invention many-sided can also be applied to three-dimensional (3D) image capture, digital camera, movement Product, digital flat panel, smart television, network monitoring device, somatic sensation television game machine, automobile data recorder, reversing and can be worn developing apparatus It wears in the electronic devices such as formula product.

The present invention provides a kind of image-taking device, includes sampling image lens group above-mentioned and electronics photosensitive element, wherein electronics Photosensitive element is set to the imaging surface of sampling image lens group.There is positive refracting power by the first lens, it can be whole by sampling image lens group Light aggregate capabilities concentrate on its object side, the volume of sampling image lens group can be effectively controlled whereby, with promoted carry convenience Property.In addition, the 4th lens of sampling image lens group and the 5th lens all have negative refracting power, the principal point of sampling image lens group can be made whereby The back focal length of sampling image lens group can be effectively controlled far from its image side end in (Principal Point), is conducive to remain miniature Change.Preferably, image-taking device can further include lens barrel (Barrel Member), support device (Holder Member) or its Combination.

Image-taking device can also include a prism, and prism is set to the optical path between object and the imaging surface of sampling image lens group On, it may be disposed between object and sampling image lens group (as shown in figure 28), also may be disposed in sampling image lens group and (scheme not take off Show) or sampling image lens group and imaging surface between (figure do not disclose).Whereby, the optical path of incident light can be made to turn to according to actual demand, reduced The height being arranged needed for sampling image lens group, can more promote the miniaturization of image-taking device or its electronic device mounted.

The present invention provides a kind of electronic device, includes image-taking device above-mentioned.Whereby, the same of miniaturization advantage is being played When, preferable longshot effect is provided, and image quality can be promoted.Preferably, electronic device can further include control list Member (Control Unit), display unit (Display), storage element (Storage Unit), random access memory (RAM) Or combinations thereof.

According to above embodiment, specific embodiment set forth below simultaneously cooperates attached drawing to be described in detail.

Fig. 1 and Fig. 2 is please referred to, wherein Fig. 1 is painted a kind of schematic diagram of image-taking device according to first embodiment of the invention, Fig. 2 is sequentially spherical aberration, astigmatism and the distortion curve graph of first embodiment from left to right.As shown in Figure 1, the capture of first embodiment Device includes sampling image lens group (not another label) and electronics photosensitive element 180.Sampling image lens group is sequentially wrapped by object side to image side Containing the first lens 110, aperture 100, the second lens 120, the third lens 130, the 4th lens 140, the 5th lens 150, infrared ray Filter element 160 and imaging surface 170 are filtered out, and electronics photosensitive element 180 is set to the imaging surface 170 of sampling image lens group, It is five (110-150) that middle sampling image lens group, which has the lens sum of refracting power, and the first lens 110, the second lens 120, the In three lens 130, the 4th lens 140 and the 5th lens 150, between two adjacent lens between all there is an air on optical axis Every.

First lens 110 have positive refracting power, and are plastic cement material, and object side surface 111 is convex surface, image side surface 112 be convex surface, and is all aspherical.In addition, the first lens object side surface 111 has an at least point of inflexion.

Second lens 120 have negative refracting power, and are plastic cement material, and object side surface 121 is concave surface, image side surface 122 be concave surface, and is all aspherical.In addition, the second lens object side surface 121 has an at least point of inflexion.

The third lens 130 have positive refracting power, and are plastic cement material, and object side surface 131 is concave surface, image side surface 132 be convex surface, and is all aspherical.In addition, the third lens object side surface 131 and image side surface 132 all have an at least contrary flexure Point.

4th lens 140 have negative refracting power, and are plastic cement material, and object side surface 141 is concave surface, image side surface 142 be concave surface, and is all aspherical.In addition, the 4th lens image side surface 142 has an at least point of inflexion.

5th lens 150 have negative refracting power, and are plastic cement material, and object side surface 151 is concave surface, image side surface 152 be convex surface, and is all aspherical.

In addition, the first lens 110, the second lens 120, the third lens 130, the 4th lens 140 and the 5th lens 150 are bent It rolls in power, is most strong with the refracting power of the first lens 110.

It is glass material that infrared ray, which filters out filter element 160, is set between the 5th lens 150 and imaging surface 170, and not Influence the focal length of sampling image lens group.

The aspherical fitting equation of above-mentioned each lens is expressed as follows:

Wherein:

X: the point for being Y apart from optical axis on aspherical, with the relative distance for being tangential on intersection point section on aspherical optical axis；

Y: the vertical range of point and optical axis in aspheric curve；

R: radius of curvature；

K: conical surface coefficient；And

Ai: the i-th rank asphericity coefficient.

In the sampling image lens group of first embodiment, the focal length of sampling image lens group is f, the f-number (f- of sampling image lens group It number) is Fno, the half at maximum visual angle is HFOV in sampling image lens group, and numerical value is as follows: f=6.07mm；Fno=2.95； And HFOV=18.5 degree.

In the sampling image lens group of first embodiment, the refractive index of the first lens 110 is N1, the refractive index of the second lens 120 For N2, the refractive index of the third lens 130 is N3, and the refractive index of the 4th lens 140 is N4, and the refractive index of the 5th lens is N5, N1, The maximum is Nmax in N2, N3, N4 and N5, meets following condition: Nmax=1.639.

In the sampling image lens group of first embodiment, the abbe number of the 4th lens 140 is V4, the dispersion of the 5th lens 150 Coefficient is V5, meets following condition: V4+V5=111.8.

In the sampling image lens group of first embodiment, the third lens 130 are in the spacing distance on optical axis with the 4th lens 140 T34, the 4th lens 140 and the 5th lens are T45 in the spacing distance on optical axis, meet following condition: T34/T45= 0.21。

In the sampling image lens group of first embodiment, the focal length of sampling image lens group is f, the song of the first lens object side surface 111 Rate radius is R1, meets following condition: f/R1=4.10.

In the sampling image lens group of first embodiment, the radius of curvature of the first lens object side surface 111 is R1, the first lens picture The radius of curvature of side surface 112 is R2, and the radius of curvature on the 4th lens image side surface 142 is R8, the 5th lens object side surface 151 Radius of curvature be R9, meet following condition: (R1+R2)/(R1-R2)=- 0.58；And (R8+R9)/(R8-R9)= 0.22。

In the sampling image lens group of first embodiment, the focal length of the first lens 110 is f1, and the focal length of the 4th lens 140 is f4, The focal length of 5th lens 150 is f5, and the synthesis focal length of the first lens 110 and the second lens 120 is f12, the 4th lens 140 and the The synthesis focal length of five lens 150 is f45, meets following condition: f1/f4=-0.56；F4/f5=0.08；And f12/f45 =-1.19.

In the sampling image lens group of first embodiment, the focal length of sampling image lens group is f, the song of the first lens object side surface 111 Rate radius is R1, the radius of curvature on the first lens image side surface 112 is R2, the first lens 110 on optical axis with a thickness of CT1, It meets following condition: (f/R1)-(f/R2)+((f × CT1)/(R1 × R2))=4.40.

In the sampling image lens group of first embodiment, the half at maximum visual angle is HFOV in sampling image lens group, is met following Condition: tan (2 × HFOV)=0.75.

In the sampling image lens group of first embodiment, 100 to the 5th lens image side surface 152 of aperture is in the distance on optical axis SD, 111 to the 5th lens image side surface 152 of the first lens object side surface are TD in the distance on optical axis, meet following condition: SD/TD=0.76.

In the sampling image lens group of first embodiment, the focal length of sampling image lens group is f, and the maximum image height of sampling image lens group is The entrance pupil diameter of ImgH, sampling image lens group are EPD, meet following condition: f/ImgH=2.89；And EPD/ImgH= 0.98。

In the sampling image lens group of first embodiment, the first lens object side surface 111 is to imaging surface 170 in the distance on optical axis For TL, the focal length of sampling image lens group is f, and the maximum image height of sampling image lens group is ImgH, meets following condition: TL=5.89； TL/f=0.97；And TL/ImgH=2.81.

Cooperate again referring to following table one and table two.

Table one is the detailed structured data of Fig. 1 first embodiment, and wherein the unit of radius of curvature, thickness and focal length is mm, And surface 0-14 is sequentially indicated by the surface of object side to image side.Table two is the aspherical surface data in first embodiment, wherein k table Conical surface coefficient in aspheric curve equation, A4-A14 then indicate each surface 4-14 rank asphericity coefficient.In addition, following Embodiment table is the schematic diagram and aberration curve figure of corresponding each embodiment, in table the definition of data all with first embodiment The definition of table one and table two is identical, is not added repeats herein.

In addition, by upper list one it is found that the third lens 130 have positive refracting power, and its abbe number in first embodiment Less than 30.

Furthermore by upper list one it is found that in first embodiment, the first lens 110 and the second lens 120 are between on optical axis For gauge from for T12, the second lens 120 and the third lens 130 are T23, the third lens 130 and the 4th in the spacing distance on optical axis Lens 140 are T34 in the spacing distance on optical axis, and the 4th lens 140 are in the spacing distance on optical axis with the 5th lens 150 T45, wherein T45 is greater than T12, T23 and T34.

It please cooperate referring to Figure 27, be painted according to sampling image lens group L in Fig. 1 first embodiment and object O and its imaging The schematic diagram of the setting of face 170 relationship.As shown in Figure 27, incident light can be incident in sampling image lens group L from object O straight line, and in The imaging of its imaging surface 170.

Refer again to Figure 28, be painted according to sampling image lens group L, prism P and object O in Fig. 1 first embodiment and its at The schematic diagram of another setting relationship of image planes 170.As shown in Figure 28, image-taking device can include also a prism P, be set to shot In optical path between object O and the imaging surface 170 of sampling image lens group L.Through the setting of prism P, the optical path of incident light can be made to turn to, The height being arranged needed for sampling image lens group L is reduced, the miniaturization of image-taking device or its electronic device mounted can be more promoted.

Following examples can all be configured with above-mentioned Figure 27 or Figure 28, therefore without adding repeating.

Referring to figure 3. and Fig. 4, wherein Fig. 3 is painted a kind of schematic diagram of image-taking device according to second embodiment of the invention, Fig. 4 is sequentially spherical aberration, astigmatism and the distortion curve graph of second embodiment from left to right.From the figure 3, it may be seen that the capture of second embodiment Device includes sampling image lens group (not another label) and electronics photosensitive element 280.Sampling image lens group is sequentially wrapped by object side to image side Containing the first lens 210, aperture 200, the second lens 220, the third lens 230, the 4th lens 240, the 5th lens 250, infrared ray Filter element 260 and imaging surface 270 are filtered out, and electronics photosensitive element 280 is set to the imaging surface 270 of sampling image lens group, It is five (210-250) that middle sampling image lens group, which has the lens sum of refracting power, and the first lens 210, the second lens 220, the In three lens 230, the 4th lens 240 and the 5th lens 250, between two adjacent lens between all there is an air on optical axis Every.

First lens 210 have positive refracting power, and are plastic cement material, and object side surface 211 is convex surface, image side surface 212 be convex surface, and is all aspherical.In addition, the first lens object side surface 211 has an at least point of inflexion.

Second lens 220 have negative refracting power, and are plastic cement material, and object side surface 221 is concave surface, image side surface 222 be concave surface, and is all aspherical.In addition, the second lens object side surface 221 has an at least point of inflexion.

The third lens 230 have positive refracting power, and are plastic cement material, and object side surface 231 is convex surface, image side surface 232 be convex surface, and is all aspherical.In addition, the third lens object side surface 231 has an at least point of inflexion.

4th lens 240 have negative refracting power, and are plastic cement material, and object side surface 241 is concave surface, image side surface 242 be concave surface, and is all aspherical.

5th lens 250 have negative refracting power, and are plastic cement material, and object side surface 251 is concave surface, image side surface 252 be convex surface, and is all aspherical.In addition, the 5th lens object side surface 251 has an at least point of inflexion.

In addition, the first lens 210, the second lens 220, the third lens 230, the 4th lens 240 and the 5th lens 250 are bent It rolls in power, is most strong with the refracting power of the first lens 210.

It is glass material that infrared ray, which filters out filter element 260, is set between the 5th lens 250 and imaging surface 270, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table three and table four.

In second embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table three and table four can extrapolate following data:

In addition, by upper list three it is found that the third lens 230 have positive refracting power, and its abbe number in second embodiment Less than 30.

Furthermore by upper list three it is found that in second embodiment, the first lens 210 and the second lens 220 are between on optical axis For gauge from for T12, the second lens 220 and the third lens 230 are T23, the third lens 230 and the 4th in the spacing distance on optical axis Lens 240 are T34 in the spacing distance on optical axis, and the 4th lens 240 are in the spacing distance on optical axis with the 5th lens 250 T45, wherein T45 is greater than T12, T23 and T34.

<3rd embodiment>

Referring to figure 5. and Fig. 6, wherein Fig. 5 is painted a kind of schematic diagram of image-taking device according to third embodiment of the invention, Fig. 6 is sequentially spherical aberration, astigmatism and the distortion curve graph of 3rd embodiment from left to right.As shown in Figure 5, the capture of 3rd embodiment Device includes sampling image lens group (not another label) and electronics photosensitive element 380.Sampling image lens group is sequentially wrapped by object side to image side Containing the first lens 310, aperture 300, the second lens 320, the third lens 330, the 4th lens 340, the 5th lens 350, infrared ray Filter element 360 and imaging surface 370 are filtered out, and electronics photosensitive element 380 is set to the imaging surface 370 of sampling image lens group, It is five (310-350) that middle sampling image lens group, which has the lens sum of refracting power, and the first lens 310, the second lens 320, the In three lens 330, the 4th lens 340 and the 5th lens 350, between two adjacent lens between all there is an air on optical axis Every.

First lens 310 have positive refracting power, and are plastic cement material, and object side surface 311 is convex surface, image side surface 312 be convex surface, and is all aspherical.In addition, the first lens object side surface 311 has an at least point of inflexion.

Second lens 320 have negative refracting power, and are plastic cement material, and object side surface 321 is concave surface, image side surface 322 be concave surface, and is all aspherical.In addition, the second lens object side surface 321 has an at least point of inflexion.

The third lens 330 have positive refracting power, and are plastic cement material, and object side surface 331 is concave surface, image side surface 332 be convex surface, and is all aspherical.In addition, the third lens object side surface 331 has an at least point of inflexion.

4th lens 340 have negative refracting power, and are plastic cement material, and object side surface 341 is concave surface, image side surface 342 be concave surface, and is all aspherical.

5th lens 350 have negative refracting power, and are plastic cement material, and object side surface 351 is concave surface, image side surface 352 be convex surface, and is all aspherical.In addition, the 5th lens object side surface 351 has an at least point of inflexion.

In addition, the first lens 310, the second lens 320, the third lens 330, the 4th lens 340 and the 5th lens 350 are bent It rolls in power, is most strong with the refracting power of the first lens 310.

It is glass material that infrared ray, which filters out filter element 360, is set between the 5th lens 350 and imaging surface 370, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table five and table six.

In 3rd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table five and table six can extrapolate following data:

In addition, by upper list five it is found that the third lens 330 have positive refracting power, and its abbe number in 3rd embodiment Less than 30.

Furthermore by upper list five it is found that in 3rd embodiment, the first lens 310 and the second lens 320 are between on optical axis For gauge from for T12, the second lens 320 and the third lens 330 are T23, the third lens 330 and the 4th in the spacing distance on optical axis Lens 340 are T34 in the spacing distance on optical axis, and the 4th lens 340 are in the spacing distance on optical axis with the 5th lens 350 T45, wherein T45 is greater than T12, T23 and T34.

Fig. 7 and Fig. 8 is please referred to, wherein Fig. 7 is painted a kind of schematic diagram of image-taking device according to fourth embodiment of the invention, Fig. 8 is sequentially spherical aberration, astigmatism and the distortion curve graph of fourth embodiment from left to right.As shown in Figure 7, the capture of fourth embodiment Device includes sampling image lens group (not another label) and electronics photosensitive element 480.Sampling image lens group is sequentially wrapped by object side to image side Containing the first lens 410, aperture 400, the second lens 420, the third lens 430, the 4th lens 440, the 5th lens 450, infrared ray Filter element 460 and imaging surface 470 are filtered out, and electronics photosensitive element 480 is set to the imaging surface 470 of sampling image lens group, It is five (410-450) that middle sampling image lens group, which has the lens sum of refracting power, and the first lens 410, the second lens 420, the In three lens 430, the 4th lens 440 and the 5th lens 450, between two adjacent lens between all there is an air on optical axis Every.

First lens 410 have positive refracting power, and are plastic cement material, and object side surface 411 is convex surface, image side surface 412 be convex surface, and is all aspherical.In addition, the first lens object side surface 411 has an at least point of inflexion.

Second lens 420 have negative refracting power, and are plastic cement material, and object side surface 421 is concave surface, image side surface 422 be concave surface, and is all aspherical.In addition, the second lens object side surface 421 has an at least point of inflexion.

The third lens 430 have positive refracting power, and are plastic cement material, and object side surface 431 is concave surface, image side surface 432 be convex surface, and is all aspherical.In addition, the third lens object side surface 431 and image side surface 432 all have an at least contrary flexure Point.

4th lens 440 have negative refracting power, and are plastic cement material, and object side surface 441 is concave surface, image side surface 442 be convex surface, and is all aspherical.In addition, the 4th lens image side surface 442 has an at least point of inflexion.

5th lens 450 have negative refracting power, and are plastic cement material, and object side surface 451 is concave surface, image side surface 452 be concave surface, and is all aspherical.In addition, the 5th lens image side surface 452 has an at least point of inflexion.

In addition, the first lens 410, the second lens 420, the third lens 430, the 4th lens 440 and the 5th lens 450 are bent It rolls in power, is most strong with the refracting power of the first lens 410.

It is glass material that infrared ray, which filters out filter element 460, is set between the 5th lens 450 and imaging surface 470, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table seven and table eight.

In fourth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table seven and table eight can extrapolate following data:

In addition, by upper list seven it is found that the third lens 430 have positive refracting power, and its abbe number in fourth embodiment Less than 30.

Furthermore by upper list seven it is found that in fourth embodiment, the first lens 410 and the second lens 420 are between on optical axis For gauge from for T12, the second lens 420 and the third lens 430 are T23, the third lens 430 and the 4th in the spacing distance on optical axis Lens 440 are T34 in the spacing distance on optical axis, and the 4th lens 440 are in the spacing distance on optical axis with the 5th lens 450 T45, wherein T45 is greater than T12, T23 and T34.

Fig. 9 and Figure 10 is please referred to, wherein Fig. 9 is painted a kind of signal of image-taking device according to fifth embodiment of the invention Figure, Figure 10 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 5th embodiment from left to right.As shown in Figure 9, the 5th embodiment Image-taking device includes sampling image lens group (not another label) and electronics photosensitive element 580.Sampling image lens group by object side to image side according to Sequence includes the first lens 510, aperture 500, the second lens 520, the third lens 530, the 4th lens 540, the 5th lens 550, red Outside line filters out filter element 560 and imaging surface 570, and electronics photosensitive element 580 is set to the imaging surface of sampling image lens group 570, it is five (510-550) that wherein sampling image lens group, which has the lens sum of refracting power, and the first lens 510, the second lens 520, in the third lens 530, the 4th lens 540 and the 5th lens 550, appoint between two adjacent lens in all having on optical axis Gas interval.

First lens 510 have positive refracting power, and are plastic cement material, and object side surface 511 is convex surface, image side surface 512 be convex surface, and is all aspherical.In addition, the first lens object side surface 511 has an at least point of inflexion.

Second lens 520 have negative refracting power, and are plastic cement material, and object side surface 521 is concave surface, image side surface 522 be concave surface, and is all aspherical.In addition, the second lens object side surface 521 has an at least point of inflexion.

The third lens 530 have negative refracting power, and are plastic cement material, and object side surface 531 is concave surface, image side surface 532 be convex surface, and is all aspherical.In addition, the third lens image side surface 532 has an at least point of inflexion.

4th lens 540 have negative refracting power, and are plastic cement material, and object side surface 541 is concave surface, image side surface 542 be convex surface, and is all aspherical.In addition, the 4th lens object side surface 541 and image side surface 542 all have an at least contrary flexure Point.

5th lens 550 have negative refracting power, and are plastic cement material, and object side surface 551 is concave surface, image side surface 552 be concave surface, and is all aspherical.In addition, the 5th lens image side surface 552 has an at least point of inflexion.

In addition, the first lens 510, the second lens 520, the third lens 530, the 4th lens 540 and the 5th lens 550 are bent It rolls in power, is most strong with the refracting power of the first lens 510.

It is glass material that infrared ray, which filters out filter element 560, is set between the 5th lens 550 and imaging surface 570, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table nine and table ten.

In 5th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table nine and table ten can extrapolate following data:

Furthermore by upper list nine it is found that in the 5th embodiment, the first lens 510 and the second lens 520 are between on optical axis For gauge from for T12, the second lens 520 and the third lens 530 are T23, the third lens 530 and the 4th in the spacing distance on optical axis Lens 540 are T34 in the spacing distance on optical axis, and the 4th lens 540 are in the spacing distance on optical axis with the 5th lens 550 T45, wherein T45 is greater than T12, T23 and T34.

Figure 11 and Figure 12 is please referred to, wherein Figure 11 is painted a kind of signal of image-taking device according to sixth embodiment of the invention Figure, Figure 12 are sequentially spherical aberration, astigmatism and the distortion curve graph of sixth embodiment from left to right.As shown in Figure 11, sixth embodiment Image-taking device include sampling image lens group (not another label) and electronics photosensitive element 680.Sampling image lens group is by object side to image side Sequentially comprising the first lens 610, the second lens 620, aperture 600, the third lens 630, the 4th lens 640, the 5th lens 650, Infrared ray filters out filter element 660 and imaging surface 670, and electronics photosensitive element 680 is set to the imaging surface of sampling image lens group 670, it is five (610-650) that wherein sampling image lens group, which has the lens sum of refracting power, and the first lens 610, the second lens 620, in the third lens 630, the 4th lens 640 and the 5th lens 650, appoint between two adjacent lens in all having on optical axis Gas interval.

First lens 610 have positive refracting power, and are plastic cement material, and object side surface 611 is convex surface, image side surface 612 be convex surface, and is all aspherical.In addition, the first lens object side surface 611 has an at least point of inflexion.

Second lens 620 have negative refracting power, and are plastic cement material, and object side surface 621 is concave surface, image side surface 622 be concave surface, and is all aspherical.In addition, the second lens object side surface 621 and image side surface 622 all have an at least contrary flexure Point.

The third lens 630 have negative refracting power, and are plastic cement material, and object side surface 631 is concave surface, image side surface 632 be convex surface, and is all aspherical.In addition, the third lens image side surface 632 has an at least point of inflexion.

4th lens 640 have negative refracting power, and are plastic cement material, and object side surface 641 is concave surface, image side surface 642 be concave surface, and is all aspherical.

5th lens 650 have negative refracting power, and are plastic cement material, and object side surface 651 is concave surface, image side surface 652 be convex surface, and is all aspherical.

In addition, the first lens 610, the second lens 620, the third lens 630, the 4th lens 640 and the 5th lens 650 are bent It rolls in power, is most strong with the refracting power of the first lens 610.

It is glass material that infrared ray, which filters out filter element 660, is set between the 5th lens 650 and imaging surface 670, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table 11 and table 12.

In sixth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 11 and table 12 can extrapolate following data:

Furthermore by upper list 11 it is found that in sixth embodiment, the first lens 610 and the second lens 620 are on optical axis Spacing distance is T12, and the second lens 620 and the third lens 630 are T23 in the spacing distance on optical axis, the third lens 630 and the Four lens 640 are T34 in the spacing distance on optical axis, and the 4th lens 640 are in the spacing distance on optical axis with the 5th lens 650 T45, wherein T45 is greater than T12, T23 and T34.

Figure 13 and Figure 14 is please referred to, wherein Figure 13 is painted a kind of signal of image-taking device according to seventh embodiment of the invention Figure, Figure 14 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 7th embodiment from left to right.As shown in Figure 13, the 7th embodiment Image-taking device include sampling image lens group (not another label) and electronics photosensitive element 780.Sampling image lens group is by object side to image side Sequentially comprising the first lens 710, the second lens 720, aperture 700, the third lens 730, the 4th lens 740, the 5th lens 750, Infrared ray filters out filter element 760 and imaging surface 770, and electronics photosensitive element 780 is set to the imaging surface of sampling image lens group 770, it is five (710-750) that wherein sampling image lens group, which has the lens sum of refracting power, and the first lens 710, the second lens 720, in the third lens 730, the 4th lens 740 and the 5th lens 750, appoint between two adjacent lens in all having on optical axis Gas interval.

First lens 710 have positive refracting power, and are plastic cement material, and object side surface 711 is convex surface, image side surface 712 be convex surface, and is all aspherical.In addition, the first lens object side surface 711 has an at least point of inflexion.

Second lens 720 have positive refracting power, and are plastic cement material, and object side surface 721 is concave surface, image side surface 722 be convex surface, and is all aspherical.In addition, the second lens object side surface 721 and image side surface 722 all have an at least contrary flexure Point.

The third lens 730 have negative refracting power, and are plastic cement material, and object side surface 731 is concave surface, image side surface 732 be convex surface, and is all aspherical.In addition, the third lens image side surface 732 has an at least point of inflexion.

4th lens 740 have negative refracting power, and are plastic cement material, and object side surface 741 is convex surface, image side surface 742 be concave surface, and is all aspherical.In addition, the 4th lens object side surface 741 has an at least point of inflexion.

5th lens 750 have negative refracting power, and are plastic cement material, and object side surface 751 is concave surface, image side surface 752 be convex surface, and is all aspherical.In addition, the 5th lens object side surface 751 has an at least point of inflexion.

In addition, the first lens 710, the second lens 720, the third lens 730, the 4th lens 740 and the 5th lens 750 are bent It rolls in power, is most strong with the refracting power of the first lens 710.

It is glass material that infrared ray, which filters out filter element 760, is set between the 5th lens 750 and imaging surface 770, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table 13 and table 14.

In 7th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 13 and table 14 can extrapolate following data:

In addition, by upper list 13 it is found that the second lens 720 have positive refracting power, and its dispersion system in the 7th embodiment Number is less than 30.

Furthermore by upper list 13 it is found that in the 7th embodiment, the first lens 710 and the second lens 720 are on optical axis Spacing distance is T12, and the second lens 720 and the third lens 730 are T23 in the spacing distance on optical axis, the third lens 730 and the Four lens 740 are T34 in the spacing distance on optical axis, and the 4th lens 740 are in the spacing distance on optical axis with the 5th lens 750 T45, wherein T45 is greater than T12, T23 and T34.

Figure 15 and Figure 16 is please referred to, wherein Figure 15 is painted a kind of signal of image-taking device according to eighth embodiment of the invention Figure, Figure 16 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 8th embodiment from left to right.As shown in Figure 15, the 8th embodiment Image-taking device include sampling image lens group (not another label) and electronics photosensitive element 880.Sampling image lens group is by object side to image side Sequentially comprising the first lens 810, aperture 800, the second lens 820, the third lens 830, the 4th lens 840, the 5th lens 850, Infrared ray filters out filter element 860 and imaging surface 870, and electronics photosensitive element 880 is set to the imaging surface of sampling image lens group 870, it is five (810-850) that wherein sampling image lens group, which has the lens sum of refracting power, and the first lens 810, the second lens 820, in the third lens 830, the 4th lens 840 and the 5th lens 850, appoint between two adjacent lens in all having on optical axis Gas interval.

First lens 810 have positive refracting power, and are plastic cement material, and object side surface 811 is convex surface, image side surface 812 be convex surface, and is all aspherical.In addition, the first lens object side surface 811 has an at least point of inflexion.

Second lens 820 have negative refracting power, and are plastic cement material, and object side surface 821 is concave surface, image side surface 822 be concave surface, and is all aspherical.In addition, the second lens object side surface 821 has an at least point of inflexion.

The third lens 830 have positive refracting power, and are plastic cement material, and object side surface 831 is convex surface, image side surface 832 be concave surface, and is all aspherical.In addition, the third lens image side surface 832 has an at least point of inflexion.

4th lens 840 have negative refracting power, and are plastic cement material, and object side surface 841 is concave surface, image side surface 842 be convex surface, and is all aspherical.In addition, the 4th lens object side surface 841 and image side surface 842 all have an at least contrary flexure Point.

5th lens 850 have negative refracting power, and are plastic cement material, and object side surface 851 is concave surface, image side surface 852 be concave surface, and is all aspherical.In addition, the 5th lens object side surface 851 and image side surface 852 all have an at least contrary flexure Point.

In addition, the first lens 810, the second lens 820, the third lens 830, the 4th lens 840 and the 5th lens 850 are bent It rolls in power, is most strong with the refracting power of the first lens 810.

It is glass material that infrared ray, which filters out filter element 860, is set between the 5th lens 850 and imaging surface 870, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table 15 and table 16.

In 8th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 15 and table 16 can extrapolate following data:

In addition, by upper list 15 it is found that the third lens 830 have positive refracting power, and its dispersion system in the 8th embodiment Number is less than 30.

Figure 17 and Figure 18 is please referred to, wherein Figure 17 is painted a kind of signal of image-taking device according to ninth embodiment of the invention Figure, Figure 18 are sequentially spherical aberration, astigmatism and the distortion curve graph of the 9th embodiment from left to right.As shown in Figure 17, the 9th embodiment Image-taking device include sampling image lens group (not another label) and electronics photosensitive element 980.Sampling image lens group is by object side to image side Sequentially comprising the first lens 910, aperture 900, the second lens 920, the third lens 930, the 4th lens 940, the 5th lens 950, Infrared ray filters out filter element 960 and imaging surface 970, and electronics photosensitive element 980 is set to the imaging surface of sampling image lens group 970, it is five (910-950) that wherein sampling image lens group, which has the lens sum of refracting power, and the first lens 910, the second lens 920, in the third lens 930, the 4th lens 940 and the 5th lens 950, appoint between two adjacent lens in all having on optical axis Gas interval.

First lens 910 have positive refracting power, and are plastic cement material, and object side surface 911 is convex surface, image side surface 912 be convex surface, and is all aspherical.In addition, the first lens object side surface 911 has an at least point of inflexion.

Second lens 920 have negative refracting power, and are plastic cement material, and object side surface 921 is concave surface, image side surface 922 be concave surface, and is all aspherical.In addition, the second lens object side surface 921 has an at least point of inflexion.

The third lens 930 have positive refracting power, and are plastic cement material, and object side surface 931 is convex surface, image side surface 932 be convex surface, and is all aspherical.In addition, the third lens object side surface 931 and image side surface 932 all have an at least contrary flexure Point.

4th lens 940 have negative refracting power, and are plastic cement material, and object side surface 941 is concave surface, image side surface 942 be concave surface, and is all aspherical.In addition, the 4th lens object side surface 941 has an at least point of inflexion.

5th lens 950 have negative refracting power, and are plastic cement material, and object side surface 951 is concave surface, image side surface 952 be convex surface, and is all aspherical.In addition, the 5th lens object side surface 951 and image side surface 952 all have an at least contrary flexure Point.

In addition, the first lens 910, the second lens 920, the third lens 930, the 4th lens 940 and the 5th lens 950 are bent It rolls in power, is most strong with the refracting power of the first lens 910.

It is glass material that infrared ray, which filters out filter element 960, is set between the 5th lens 950 and imaging surface 970, and not Influence the focal length of sampling image lens group.

Cooperate again referring to following table 17 and table 18.

In 9th embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 17 and table 18 can extrapolate following data:

In addition, by upper list 17 it is found that the third lens 930 have positive refracting power, and its dispersion system in the 9th embodiment Number is less than 30.

Furthermore by upper list 17 it is found that in the 9th embodiment, the first lens 910 and the second lens 920 are on optical axis Spacing distance is T12, and the second lens 920 and the third lens 930 are T23 in the spacing distance on optical axis, the third lens 930 and the Four lens 940 are T34 in the spacing distance on optical axis, and the 4th lens 940 are in the spacing distance on optical axis with the 5th lens 950 T45, wherein T45 is greater than T12, T23 and T34.

Figure 19 and Figure 20 is please referred to, wherein Figure 19 is painted a kind of signal of image-taking device according to tenth embodiment of the invention Figure, Figure 20 are sequentially spherical aberration, astigmatism and the distortion curve graph of the tenth embodiment from left to right.It appears from figure 19 that the tenth embodiment Image-taking device include sampling image lens group (not another label) and electronics photosensitive element 1080.Sampling image lens group is by object side to image side It sequentially include the first lens 1010, aperture 1000, the second lens 1020, the third lens 1030, diaphragm 1001, the 4th lens 1040, the 5th lens 1050, infrared ray filter out filter element 1060 and imaging surface 1070, and electronics photosensitive element 1080 is arranged In the imaging surface 1070 of sampling image lens group, it is five (1010-1050) that wherein sampling image lens group, which has the lens sum of refracting power, And in first lens 1010, the second lens 1020, the third lens 1030, the 4th lens 1040 and the 5th lens 1050, Ren Erxiang In all having an airspace on optical axis between adjacent lens.

First lens 1010 have positive refracting power, and are plastic cement material, and object side surface 1011 is convex surface, image side surface 1012 be convex surface, and is all aspherical.In addition, the first lens object side surface 1011 has an at least point of inflexion.

Second lens 1020 have negative refracting power, and are plastic cement material, and object side surface 1021 is concave surface, image side surface 1022 be concave surface, and is all aspherical.In addition, the second lens object side surface 1021 has an at least point of inflexion.

The third lens 1030 have positive refracting power, and are plastic cement material, and object side surface 1031 is convex surface, image side surface 1032 be convex surface, and is all aspherical.In addition, the third lens image side surface 1032 has an at least point of inflexion.

4th lens 1040 have negative refracting power, and are plastic cement material, and object side surface 1041 is concave surface, image side surface 1042 be concave surface, and is all aspherical.In addition, the 4th lens image side surface 1042 has an at least point of inflexion.

5th lens 1050 have negative refracting power, and are plastic cement material, and object side surface 1051 is concave surface, image side surface 1052 be concave surface, and is all aspherical.In addition, the 5th lens object side surface 1051 and image side surface 1052 are all anti-with at least one Qu Dian.

In addition, the first lens 1010, the second lens 1020, the third lens 1030, the 4th lens 1040 and the 5th lens It is most strong with the refracting power of the first lens 1010 in 1050 refracting power.

It is glass material that infrared ray, which filters out filter element 1060, is set between the 5th lens 1050 and imaging surface 1070, And do not influence the focal length of sampling image lens group.

Cooperate again referring to following table 19 and table 20.

In tenth embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition is all identical with the first embodiment, and not in this to go forth.

Cooperation table 19 and table 20 can extrapolate following data:

In addition, by upper list 19 it is found that the third lens 1030 have positive refracting power, and its dispersion in the tenth embodiment Coefficient is less than 30.

Furthermore by upper list 19 it is found that in the tenth embodiment, the first lens 1010 and the second lens 1020 are on optical axis Spacing distance be T12, the second lens 1020 and the third lens 1030 are T23, the third lens in the spacing distance on optical axis 1030 and the 4th lens 1040 in the spacing distance on optical axis be T34, the 4th lens 1040 and the 5th lens 1050 are on optical axis Spacing distance be T45, wherein T45 be greater than T12, T23 and T34.

1 and Figure 22 referring to figure 2., wherein Figure 21 is painted shows according to a kind of image-taking device of eleventh embodiment of the invention It is intended to, Figure 22 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 11st embodiment from left to right.As shown in Figure 21, the ten one The image-taking device of embodiment includes sampling image lens group (not another label) and electronics photosensitive element 1180.Sampling image lens group is by object side It sequentially include the first lens 1110, aperture 1100, the second lens 1120, the third lens 1130, the 4th lens 1140, to image side Five lens 1150, infrared ray filter out filter element 1160 and imaging surface 1170, and electronics photosensitive element 1180 is set to capture The imaging surface 1170 of lens group, it is five (1110-1150) that wherein sampling image lens group, which has the lens sum of refracting power, and first In lens 1110, the second lens 1120, the third lens 1130, the 4th lens 1140 and the 5th lens 1150, appoint two adjacent Between mirror on optical axis all have an airspace.

First lens 1110 have positive refracting power, and are plastic cement material, and object side surface 1111 is convex surface, image side surface 1112 be concave surface, and is all aspherical.In addition, the first lens object side surface 1111 and image side surface 1112 are all anti-with at least one Qu Dian.

Second lens 1120 have negative refracting power, and are plastic cement material, and object side surface 1121 is convex surface, image side surface 1122 be concave surface, and is all aspherical.

The third lens 1130 have positive refracting power, and are plastic cement material, and object side surface 1131 is concave surface, image side surface 1132 be convex surface, and is all aspherical.In addition, the third lens object side surface 1131 has an at least point of inflexion.

4th lens 1140 have negative refracting power, and are plastic cement material, and object side surface 1141 is concave surface, image side surface 1142 be concave surface, and is all aspherical.In addition, the 4th lens image side surface 1142 has an at least point of inflexion.

5th lens 1150 have negative refracting power, and are plastic cement material, and object side surface 1151 is concave surface, image side surface 1152 be convex surface, and is all aspherical.

In addition, the first lens 1110, the second lens 1120, the third lens 1130, the 4th lens 1140 and the 5th lens It is most strong with the refracting power of the first lens 1110 in 1150 refracting power.

It is glass material that infrared ray, which filters out filter element 1160, is set between the 5th lens 1150 and imaging surface 1170, And do not influence the focal length of sampling image lens group.

Cooperate again referring to following table 21 and table 22.

In 11st embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition be all identical with the first embodiment, not in this to go forth.

Cooperation table 21 and table 22 can extrapolate following data:

In addition, by upper list 21 it is found that the third lens 1130 have positive refracting power, and its in the 11st embodiment Abbe number is less than 30.

Furthermore by upper list 21 it is found that in the 11st embodiment, the first lens 1110 and the second lens 1120 are in light Spacing distance on axis is T12, and the second lens 1120 are T23 in the spacing distance on optical axis with the third lens 1130, and third is saturating Mirror 1130 and the 4th lens 1140 are T34 in the spacing distance on optical axis, and the 4th lens 1140 and the 5th lens 1150 are in optical axis On spacing distance be T45, wherein T45 be greater than T12, T23 and T34.

3 and Figure 24 referring to figure 2., wherein Figure 23 is painted shows according to a kind of image-taking device of twelveth embodiment of the invention It is intended to, Figure 24 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 12nd embodiment from left to right.As shown in Figure 23, the ten two The image-taking device of embodiment includes sampling image lens group (not another label) and electronics photosensitive element 1280.Sampling image lens group is by object side It sequentially include the first lens 1210, aperture 1200, the second lens 1220, the third lens 1230, the 4th lens 1240, to image side Five lens 1250, infrared ray filter out filter element 1260 and imaging surface 1270, and electronics photosensitive element 1280 is set to capture The imaging surface 1270 of lens group, it is five (1210-1250) that wherein sampling image lens group, which has the lens sum of refracting power, and first In lens 1210, the second lens 1220, the third lens 1230, the 4th lens 1240 and the 5th lens 1250, appoint two adjacent Between mirror on optical axis all have an airspace.

First lens 1210 have positive refracting power, and are plastic cement material, and object side surface 1211 is convex surface, image side surface 1212 be concave surface, and is all aspherical.In addition, the first lens object side surface 1211 and image side surface 1212 are all anti-with at least one Qu Dian.

Second lens 1220 have negative refracting power, and are plastic cement material, and object side surface 1221 is convex surface, image side surface 1222 be concave surface, and is all aspherical.

The third lens 1230 have negative refracting power, and are plastic cement material, and object side surface 1231 is convex surface, image side surface 1232 be concave surface, and is all aspherical.In addition, the third lens object side surface 1231 and image side surface 1232 are all anti-with at least one Qu Dian.

4th lens 1240 have negative refracting power, and are plastic cement material, and object side surface 1241 is concave surface, image side surface 1242 be concave surface, and is all aspherical.In addition, the 4th lens object side surface 1241 and image side surface 1242 are all anti-with at least one Qu Dian.

5th lens 1250 have negative refracting power, and are plastic cement material, and object side surface 1251 is concave surface, image side surface 1252 be convex surface, and is all aspherical.

In addition, the first lens 1210, the second lens 1220, the third lens 1230, the 4th lens 1240 and the 5th lens It is most strong with the refracting power of the first lens 1210 in 1250 refracting power.

It is glass material that infrared ray, which filters out filter element 1260, is set between the 5th lens 1250 and imaging surface 1270, And do not influence the focal length of sampling image lens group.

Cooperate again referring to following table 23 and table 24.

In 12nd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition be all identical with the first embodiment, not in this to go forth.

Cooperation table 23 and table 24 can extrapolate following data:

Furthermore by upper list 23 it is found that in the 12nd embodiment, the first lens 1210 and the second lens 1220 are in light Spacing distance on axis is T12, and the second lens 1220 are T23 in the spacing distance on optical axis with the third lens 1230, and third is saturating Mirror 1230 and the 4th lens 1240 are T34 in the spacing distance on optical axis, and the 4th lens 1240 and the 5th lens 1250 are in optical axis On spacing distance be T45, wherein T45 be greater than T12, T23 and T34.

5 and Figure 26 referring to figure 2., wherein Figure 25 is painted shows according to a kind of image-taking device of thriteenth embodiment of the invention It is intended to, Figure 26 is sequentially spherical aberration, astigmatism and the distortion curve graph of the 13rd embodiment from left to right.As shown in Figure 25, the ten three The image-taking device of embodiment includes sampling image lens group (not another label) and electronics photosensitive element 1380.Sampling image lens group is by object side It sequentially include aperture 1300, the first lens 1310, the second lens 1320, the third lens 1330, the 4th lens 1340, to image side Five lens 1350, infrared ray filter out filter element 1360 and imaging surface 1370, and electronics photosensitive element 1380 is set to capture The imaging surface 1370 of lens group, it is five (1310-1350) that wherein sampling image lens group, which has the lens sum of refracting power, and first In lens 1310, the second lens 1320, the third lens 1330, the 4th lens 1340 and the 5th lens 1350, appoint two adjacent Between mirror on optical axis all have an airspace.

First lens 1310 have positive refracting power, and are plastic cement material, and object side surface 1311 is convex surface, image side surface 1312 be convex surface, and is all aspherical.

Second lens 1320 have negative refracting power, and are plastic cement material, and object side surface 1321 is concave surface, image side surface 1322 be concave surface, and is all aspherical.In addition, the second lens object side surface 1321 has an at least point of inflexion.

The third lens 1330 have positive refracting power, and are plastic cement material, and object side surface 1331 is concave surface, image side surface 1332 be convex surface, and is all aspherical.In addition, the third lens object side surface 1331 has an at least point of inflexion.

4th lens 1340 have negative refracting power, and are plastic cement material, and object side surface 1341 is concave surface, image side surface 1342 be convex surface, and is all aspherical.In addition, the 4th lens image side surface 1342 has an at least point of inflexion.

5th lens 1350 have negative refracting power, and are plastic cement material, and object side surface 1351 is concave surface, image side surface 1352 be convex surface, and is all aspherical.In addition, the 5th lens image side surface 1352 has an at least point of inflexion.

In addition, the first lens 1310, the second lens 1320, the third lens 1330, the 4th lens 1340 and the 5th lens It is most strong with the refracting power of the first lens 1310 in 1350 refracting power.

It is glass material that infrared ray, which filters out filter element 1360, is set between the 5th lens 1350 and imaging surface 1370, And do not influence the focal length of sampling image lens group.

Cooperate again referring to following table 25 and table 26.

In 13rd embodiment, aspherical fitting equation indicates the form such as first embodiment.In addition, following table parameter Definition be all identical with the first embodiment, not in this to go forth.

Cooperation table 25 and table 26 can extrapolate following data:

In addition, by upper list 25 it is found that the third lens 1330 have positive refracting power, and its in the 13rd embodiment Abbe number is less than 30.

Furthermore by upper list 25 it is found that in the 13rd embodiment, the first lens 1310 and the second lens 1320 are in light Spacing distance on axis is T12, and the second lens 1320 are T23 in the spacing distance on optical axis with the third lens 1330, and third is saturating Mirror 1330 and the 4th lens 1340 are T34 in the spacing distance on optical axis, and the 4th lens 1340 and the 5th lens 1350 are in optical axis On spacing distance be T45, wherein T45 be greater than T12, T23 and T34.

Referring to figure 2. 9, it is the schematic diagram for being painted a kind of electronic device 10 according to fourteenth embodiment of the invention.Tenth The electronic device 10 of four embodiments is a smart phone, and electronic device 10 includes image-taking device 11, and image-taking device 11 includes foundation Sampling image lens group (figure does not disclose) and electronics photosensitive element (figure does not disclose) of the invention, wherein electronics photosensitive element is set to The imaging surface of sampling image lens group, image-taking device 11 also can further include prism (figure does not disclose).

Referring to figure 3. 0, it is the schematic diagram for being painted a kind of electronic device 20 according to fifteenth embodiment of the invention.Tenth The electronic device 20 of five embodiments is a tablet computer, and electronic device 20 includes image-taking device 21, image-taking device 21 include according to According to sampling image lens group (figure does not disclose) and electronics photosensitive element (figure does not disclose) of the invention, wherein electronics photosensitive element is arranged In the imaging surface of sampling image lens group, image-taking device 21 also can further include prism (figure does not disclose).

Referring to figure 3. 1, it is the schematic diagram for being painted a kind of electronic device 30 according to sixteenth embodiment of the invention.Tenth The electronic device 30 of six embodiments is a head-mounted display (Head-mounted display, HMD), and electronic device 30 includes Image-taking device 31, image-taking device 31 include sampling image lens group (figure does not disclose) and electronics photosensitive element (figure according to the present invention Do not disclose), wherein electronics photosensitive element is set to the imaging surface of sampling image lens group, and image-taking device 31 also can further include prism (figure does not disclose).

Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, any to be familiar with this skill Person, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection scope of the present invention is worked as Subject to the scope of which is defined in the appended claims.

Claims

1. a kind of sampling image lens group sequentially includes by object side to image side: one first lens, one second lens, a third lens, one 4th lens and one the 5th lens, which is characterized in that first lens have positive refracting power, which is Convex surface, the 4th lens have negative refracting power, and the 5th lens object side surface and image side surface are all aspherical；

Wherein, the lens sum of the sampling image lens group is five, first lens, second lens, the third lens, the 4th An at least lens include an at least point of inflexion in lens and the 5th lens, and the focal length of the sampling image lens group is f, first lens Focal length be f1, the focal lengths of the 4th lens is f4, and the radius of curvature of the first lens object side surface is R1, the first lens picture The radius of curvature of side surface is R2, and first lens are in, with a thickness of CT1, the first lens object side surface to one is imaged on optical axis Face is TL in the distance on optical axis, and the third lens and the 4th lens are T34, the 4th lens in the spacing distance on optical axis With the 5th lens in the spacing distance on optical axis be T45, meet following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；

3.4<f/R1；

0.75<TL/f<1.0；And

T34/T45<1.2。

2. sampling image lens group according to claim 1, which is characterized in that second lens have negative refracting power.

3. sampling image lens group according to claim 1, which is characterized in that the 4th lens object side surface is concave surface.

4. sampling image lens group according to claim 1, which is characterized in that the 5th lens object side surface is concave surface.

5. sampling image lens group according to claim 1, which is characterized in that the 5th lens image side surface is convex surface.

6. sampling image lens group according to claim 1, which is characterized in that the 5th lens image side surface is concave surface.

7. sampling image lens group according to claim 1, which is characterized in that the refractive index of first lens is N1, this second The refractive index of lens is N2, and the refractive index of the third lens is N3, and the refractive index of the 4th lens is N4, the folding of the 5th lens Penetrating rate is N5, and the maximum is Nmax in N1, N2, N3, N4 and N5, meets following condition:

1.50<Nmax<1.70。

8. sampling image lens group according to claim 7, which is characterized in that the refractive index of first lens is N1, this second The refractive index of lens is N2, and the refractive index of the third lens is N3, and the refractive index of the 4th lens is N4, the folding of the 5th lens Penetrating rate is N5, and the maximum is Nmax in N1, N2, N3, N4 and N5, meets following condition:

1.650≤Nmax<1.70。

9. sampling image lens group according to claim 1, which is characterized in that first lens, second lens, the third are saturating An at least lens have positive refracting power in mirror, the 4th lens and the 5th lens, and this has the dispersion of positive refracting power lens Coefficient is less than 30.

10. sampling image lens group according to claim 1, which is characterized in that first lens and second lens are in optical axis On spacing distance be T12, second lens and the third lens are T23 in the spacing distance on optical axis, the third lens with 4th lens are T34 in the spacing distance on optical axis, and the 4th lens are in the spacing distance on optical axis with the 5th lens T45, T45 are greater than T12, T23 and T34.

11. sampling image lens group according to claim 1, which is characterized in that the focal length of the sampling image lens group is f, the capture The maximum image height of lens group is ImgH, meets following condition:

2.3<f/ImgH<6.0。

12. sampling image lens group according to claim 1, which is characterized in that the entrance pupil diameter of the sampling image lens group is The maximum image height of EPD, the sampling image lens group are ImgH, meet following condition:

0.7<EPD/ImgH<2.0。

13. sampling image lens group according to claim 12, which is characterized in that the entrance pupil diameter of the sampling image lens group is The maximum image height of EPD, the sampling image lens group are ImgH, meet following condition:

0.98≤EPD/ImgH<2.0。

14. sampling image lens group according to claim 1, which is characterized in that first lens are into the 5th lens wantonly two In all having an airspace on optical axis between adjacent lens, and first lens, second lens, the third lens, this In the refracting power of four lens and the 5th lens, the refracting power of first lens is most strong.

15. sampling image lens group according to claim 1, which is characterized in that the focal length of the sampling image lens group is f, this first The radius of curvature of lens object side surface is R1, and the radius of curvature on the first lens image side surface is R2, and first lens are in optical axis On with a thickness of CT1, meet following condition:

3.7<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<6.0。

16. sampling image lens group according to claim 1, which is characterized in that the third lens have positive refracting power.

17. sampling image lens group according to claim 1, which is characterized in that the entrance pupil diameter of the sampling image lens group is EPD, the maximum image height of the sampling image lens group are ImgH, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, Meet following condition:

0.7<EPD/ImgH<2.0；And

0<f4/f5。

18. a kind of image-taking device, characterized by comprising:

Sampling image lens group as described in claim 1；And

One electronics photosensitive element is set to the imaging surface of the sampling image lens group.

19. a kind of sampling image lens group sequentially includes by object side to image side: one first lens, one second lens, a third lens, One the 4th lens and one the 5th lens, which is characterized in that first lens have positive refracting power, the first lens object side surface For convex surface, the 4th lens have negative refracting power, and the 5th lens object side surface and image side surface are all aspherical；

Wherein, the lens sum of the sampling image lens group is five, first lens, second lens, the third lens, the 4th An at least lens include an at least point of inflexion in lens and the 5th lens, and the focal length of the sampling image lens group is f, first lens Focal length be f1, the focal lengths of the 4th lens is f4, and the radius of curvature of the first lens object side surface is R1, the first lens picture The radius of curvature of side surface is R2, and first lens are in, with a thickness of CT1, the first lens object side surface to one is imaged on optical axis Face is TL in the distance on optical axis, and the third lens and the 4th lens are T34, the 4th lens in the spacing distance on optical axis It in the spacing distance on optical axis is T45 with the 5th lens, the refractive index of first lens is N1, the refractive index of second lens For N2, the refractive index of the third lens is N3, and the refractive index of the 4th lens is N4, and the refractive index of the 5th lens is N5, N1, The maximum is Nmax in N2, N3, N4 and N5, meets following condition:

3.4<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<7.5；

-1.0<f1/f4<0；

3.4<f/R1；

0.75<TL/f<1.0；

T34/T45<1.2；And

1.50<Nmax<1.70。

20. sampling image lens group according to claim 19, which is characterized in that first lens, second lens, the third An at least lens have positive refracting power in lens, the 4th lens and the 5th lens, and this has the color of positive refracting power lens Coefficient is dissipated less than 30.

21. sampling image lens group according to claim 19, which is characterized in that first lens and second lens are in optical axis On spacing distance be T12, second lens and the third lens are T23 in the spacing distance on optical axis, the third lens with 4th lens are T34 in the spacing distance on optical axis, and the 4th lens are in the spacing distance on optical axis with the 5th lens T45, T45 are greater than T12, T23 and T34.

22. sampling image lens group according to claim 19, which is characterized in that the focal length of the sampling image lens group is f, the capture The maximum image height of lens group is ImgH, meets following condition:

2.3<f/ImgH<6.0。

23. sampling image lens group according to claim 19, which is characterized in that the entrance pupil diameter of the sampling image lens group is The maximum image height of EPD, the sampling image lens group are ImgH, meet following condition:

0.7<EPD/ImgH<2.0。

24. sampling image lens group according to claim 23, which is characterized in that the entrance pupil diameter of the sampling image lens group is The maximum image height of EPD, the sampling image lens group are ImgH, meet following condition:

0.98≤EPD/ImgH<2.0。

25. sampling image lens group according to claim 19, which is characterized in that first lens are into the 5th lens wantonly two In all having an airspace on optical axis between adjacent lens, and first lens, second lens, the third lens, this In the refracting power of four lens and the 5th lens, the refracting power of first lens is most strong.

26. sampling image lens group according to claim 19, which is characterized in that the focal length of the sampling image lens group is f, this first The radius of curvature of lens object side surface is R1, and the radius of curvature on the first lens image side surface is R2, and first lens are in optical axis On with a thickness of CT1, meet following condition:

3.7<(f/R1)-(f/R2)+((f×CT1)/(R1×R2))<6.0。

27. sampling image lens group according to claim 19, which is characterized in that the third lens have positive refracting power.

28. sampling image lens group according to claim 19, which is characterized in that the entrance pupil diameter of the sampling image lens group is EPD, the maximum image height of the sampling image lens group are ImgH, and the focal length of the 4th lens is f4, and the focal length of the 5th lens is f5, Meet following condition:

0.7<EPD/ImgH<2.0；And

0<f4/f5。

29. a kind of image-taking device, characterized by comprising:

Sampling image lens group as claimed in claim 19；And