CN107621682A

CN107621682A - Optical imaging lens

Info

Publication number: CN107621682A
Application number: CN201711007397.7A
Authority: CN
Inventors: 张凯元; 李明; 徐标
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-10-25
Filing date: 2017-10-25
Publication date: 2018-01-23
Anticipated expiration: 2037-10-25
Also published as: CN107621682B

Abstract

This application discloses a kind of optical imaging lens, the camera lens is sequentially included along optical axis by thing side to image side：The first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens with focal power.Wherein, the first lens have negative power, and its thing side is convex surface, and image side surface is concave surface；The image side surface of 3rd lens is concave surface；The thing side of 7th lens is concave surface；Wherein, total effective focal length f of optical imaging lens, the effective focal length f4 of the 4th lens and the 5th lens effective focal length f5 meet | f/f4 |+| f/f5 | ＜ 1.

Description

Optical imaging lens

Technical field

The application is related to a kind of optical imaging lens, more specifically, the application is related to a kind of optics for including seven lens Imaging lens.

Background technology

In recent years, with CCD (Charge-Coupled Device, photosensitive coupling element) or CMOS Chip technologies such as (Complementary Metal-Oxide Semiconductor, Complimentary Metal-Oxide semiconductor elements) Development, the Pixel Dimensions of chip are less and less, and the requirement to the image quality of the optical imaging lens used that match is also More and more higher, it is desirable to which the imaging lens to match need to be provided simultaneously with high pixel and small size performance.

In addition, with the application popularization of the Portable belt electronic equipment such as mobile phone or digital camera, portable type electronic product The occasion of application is more and more extensive, and also the large aperture to the optical imaging lens used that match, high-resolution etc. propose Corresponding requirement.

The content of the invention

This application provides be applicable to portable type electronic product, can at least solve or part solve it is of the prior art The optical imaging lens of above-mentioned at least one shortcoming, for example, large aperture imaging lens.

On the one hand, this application discloses a kind of optical imaging lens, the camera lens sequentially to be wrapped along optical axis by thing side to image side Include：The first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th with focal power are saturating Mirror.Wherein, the first lens can have negative power, and its thing side can be convex surface, and image side surface can be concave surface；The image side of 3rd lens Face can be concave surface；The thing side of 7th lens can be concave surface.Wherein, total effective focal length f, the 4th lens of the optical imaging lens Effective focal length f4 and the effective focal length f5 of the 5th lens can meet | f/f4 |+| f/f5 | ＜ 1.

In one embodiment, total the effective focal length f and optical imaging lens of optical imaging lens Entry pupil diameters EPD F/EPD≤1.60 can be met.

In one embodiment, the total effective focal length f and the first lens of optical imaging lens effective focal length f1 can expire - 0.5 ＜ f/f1 ＜ 0 of foot.

In one embodiment, the radius of curvature R 3 of the thing side of the effective focal length f2 of the second lens and the second lens can Meet 1.5 ＜ f2/R3 ＜ 2.5.

In one embodiment, the radius of curvature R 12 of the image side surface of the effective focal length f6 of the 6th lens and the 6th lens - 2 ＜ f6/R12 ＜ -1 can be met.

In one embodiment, the effective focal length f6 of the 6th lens and the effective focal length f7 of the 7th lens can meet -1.5 ＜ f6/f7 ＜ -1.

In one embodiment, the 4th lens in the center thickness CT4 on optical axis and the 5th lens on optical axis Heart thickness CT5 can meet 0.5 ＜ CT4/CT5 ＜ 2.0.

In one embodiment, the first lens in the center thickness CT1 on optical axis and the 7th lens on optical axis Heart thickness CT7 can meet 1.00≤CT1/CT7 ＜ 1.50.

In one embodiment, the optics total length TTL of optical imaging lens on optical imaging lens imaging surface with having The half ImgH of effect pixel region diagonal line length can meet TTL/ImgH≤1.5.

In one embodiment, the song of the image side surface of the lens of radius of curvature R 13 and the 7th of the thing side of the 7th lens Rate radius R14 can meet | R13/R14 |≤2.

In one embodiment, the curvature of the image side surface of the lens of radius of curvature R 5 and the 3rd of the thing side of the 3rd lens Radius R6 can meet 1.5 ＜ (R5+R6)/(R5-R6)≤80.

On the other hand, this application discloses such a imaging lens, the camera lens along optical axis by thing side to image side sequentially Including：The first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th with focal power Lens.Wherein, the thing side of the first lens can be convex surface, and image side surface can be concave surface；The image side surface of 3rd lens can be concave surface；The The thing side of seven lens can be concave surface.Wherein, the first lens in the center thickness CT1 on optical axis and the 7th lens on optical axis Center thickness CT7 can meet 1.00≤CT1/CT7 ＜ 1.50.

The application employs multi-disc (for example, seven) lens, by each power of lens of reasonable distribution, face type, each Spacing etc. on axle between the center thickness of mirror and each lens so that above-mentioned optical imaging lens have ultra-thin, miniaturization, big At least one beneficial effects such as aperture, low sensitivity, good machinability, high pixel, high image quality.

Brief description of the drawings

With reference to accompanying drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings：

Fig. 1 shows the structural representation of the optical imaging lens according to the embodiment of the present application 1；

Fig. 2A to Fig. 2 D respectively illustrates chromatic curve on the axle of the optical imaging lens of embodiment 1, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 3 shows the structural representation of the optical imaging lens according to the embodiment of the present application 2；

Fig. 4 A to Fig. 4 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 2, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 5 shows the structural representation of the optical imaging lens according to the embodiment of the present application 3；

Fig. 6 A to Fig. 6 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 3, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 7 shows the structural representation of the optical imaging lens according to the embodiment of the present application 4；

Fig. 8 A to Fig. 8 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 4, astigmatism curve, distortion Curve and ratio chromatism, curve；

Fig. 9 shows the structural representation of the optical imaging lens according to the embodiment of the present application 5；

Figure 10 A to Figure 10 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 5, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 11 shows the structural representation of the optical imaging lens according to the embodiment of the present application 6；

Figure 12 A to Figure 12 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 6, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 13 shows the structural representation of the optical imaging lens according to the embodiment of the present application 7；

Figure 14 A to Figure 14 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 7, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 15 shows the structural representation of the optical imaging lens according to the embodiment of the present application 8；

Figure 16 A to Figure 16 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 8, astigmatism curve, abnormal Varied curve and ratio chromatism, curve；

Figure 17 shows the structural representation of the optical imaging lens according to the embodiment of the present application 9；

Figure 18 A to Figure 18 D respectively illustrate chromatic curve on the axle of the optical imaging lens of embodiment 9, astigmatism curve, abnormal Varied curve and ratio chromatism, curve.

Embodiment

In order to more fully understand the application, refer to the attached drawing is made into more detailed description to the various aspects of the application.Should Understand, these describe the description of the simply illustrative embodiments to the application in detail, rather than limit the application in any way Scope.In the specification, identical reference numbers identical element.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in this manual, the statement of first, second, third, etc. is only used for a feature and another spy Sign makes a distinction, and does not indicate that any restrictions to feature.Therefore, in the case of without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the 3rd lens.

In the accompanying drawings, for convenience of description, thickness, the size and dimension of lens are somewhat exaggerated.Specifically, accompanying drawing Shown in sphere or aspherical shape be illustrated by way of example.That is, sphere or aspherical shape is not limited to accompanying drawing In the sphere that shows or aspherical shape.Accompanying drawing is merely illustrative and and non-critical drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define the convex surface position When putting, then it represents that the lens surface is extremely convex surface less than near axis area；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is extremely concave surface less than near axis area.It is referred to as thing side near the surface of object in each lens, It is referred to as image side surface near the surface of imaging surface in each lens.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory Represent stated feature, element and/or part be present when being used in bright book, but do not preclude the presence or addition of one or more Further feature, element, part and/or combinations thereof.In addition, ought the statement of such as " ... at least one " appear in institute When after the list of row feature, whole listed feature, rather than the individual component in modification list are modified.In addition, work as description originally During the embodiment of application, represented " one or more embodiments of the application " using "available".Also, term " exemplary " It is intended to refer to example or illustration.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein be respectively provided with The application one skilled in the art's is generally understood that identical implication.It will also be appreciated that term (such as in everyday words Term defined in allusion quotation) implication consistent with their implications in the context of correlation technique should be interpreted as having, and It will not explained with idealization or excessively formal sense, unless clearly so limiting herein.

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The feature of the application, principle and other aspects are described in detail below.

It may include such as seven lens with focal power according to the optical imaging lens of the application illustrative embodiments, That is, the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.This seven lens Along optical axis by thing side to image side sequential.

In the exemplary embodiment, the first lens can have negative power, and its thing side can be convex surface, and image side surface can be Concave surface；Second lens have positive light coke or negative power；3rd lens have positive light coke or negative power, and its image side surface can For concave surface；4th lens have positive light coke or negative power；5th lens have positive light coke or negative power；6th lens With positive light coke or negative power；7th lens have positive light coke or negative power, and its thing side is concave surface.

In the exemplary embodiment, the second lens can have positive light coke, and its thing side can be convex surface.

In the exemplary embodiment, the thing side of the 3rd lens can be convex surface.

In the exemplary embodiment, the 6th lens can have positive light coke, and its image side surface can be convex surface.

In the exemplary embodiment, the 7th lens can have negative power, and its image side surface can be concave surface.

In the exemplary embodiment, the optical imaging lens of the application can meet conditional f/EPD≤1.60, wherein, f For total effective focal length of optical imaging lens, EPD is the Entry pupil diameters of optical imaging lens.More specifically, f and EPD are further 1.46≤f/EPD≤1.60 can be met.(that is, total effective focal length f/ camera lenses of camera lens enter the F-number Fno of optical imaging lens Pupil diameter EPD) it is smaller, the clear aperature of camera lens is bigger, and the light-inletting quantity within the same unit interval is just more.F-number Fno's Reduce, can effectively lift image planes brightness so that camera lens can preferably meet the bat during insufficient light such as cloudy day, dusk Demand is taken the photograph, there is large aperture advantage.Camera lens is configured to meet conditional f/EPD≤1.60, the process of thang-kng amount can increased In, the illumination in Enhanced Imaging face, so as to lift imaging effect of the camera lens under dark situation.

In the exemplary embodiment, the optical imaging lens of the application can meet conditional | f/f4 |+| f/f5 | ＜ 1, Wherein, f is total effective focal length of optical imaging lens, and f4 is the effective focal length of the 4th lens, and f5 is effective Jiao of the 5th lens Away from.More specifically, f, f4 and f5 can further meet 0 ＜ | f/f4 |+| f/f5 | ＜ 0.50, for example, 0.02≤| f/f4 |+| f/ f5|≤0.44.Each power of lens of reasonable disposition, it is advantageously implemented the imaging effect of high pixel.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ f/f1 of conditional -0.5 ＜ 0, its In, f is total effective focal length of optical imaging lens, and f1 is the effective focal length of the first lens.More specifically, f and f1 further may be used Meet -0.25 ＜ f/f1 ＜ -0.10, for example, -0.19≤f/f1≤- 0.16.By the negative light focus for rationally controlling the first lens Degree, the three negative rank spherical aberrations of the first lens contribution and five positive rank spherical aberrations are rationally controlled, so that what the first lens were contributed Three negative rank spherical aberrations and five positive rank spherical aberrations (that is, can respectively have positive light with each positive lens thereafter between the first lens and image side The lens of focal power) caused by positive three rank spherical aberrations and five negative rank spherical aberrations cancel out each other, and then ensure that visual field has good on axle Good image quality.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ f6/f7 of conditional -1.5 ＜ -1, its In, f6 is the effective focal length of the 6th lens, and f7 is the effective focal length of the 7th lens.More specifically, f6 and f7 can further meet- 1.5 ＜ f6/f7 ＜ -1.3, for example, -1.44≤f6/f7≤- 1.32.By rationally controlling the 6th lens and the 7th lens light focus The ratio of degree so that the residual spherical aberration after the 6th lens and the 7th lens balance can be balancing first five piece lens (that is, first Lens are to the 5th lens) caused by spherical aberration, and then realize the fine setting and control to system spherical aberration, improve to visual field aberration on axle Accurate control.

In the exemplary embodiment, the optical imaging lens of the application can meet 1.00≤CT1/CT7 of conditional ＜ 1.50, wherein, CT1 be the first lens in the center thickness on optical axis, CT7 is the 7th lens in the center thickness on optical axis.More Specifically, CT1 and CT7 can further meet 1.00≤CT1/CT7 ＜ 1.30, for example, 1.00≤CT1/CT7≤1.27.Rationally The ratio of the center thickness of the first lens and the 7th lens is controlled, can be while guarantee camera lens good machinability by mirror The optics total length TTL of head is controlled in rational scope, avoids bringing the longitudinal size of system larger burden.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ f2/R3 ＜ 2.5 of conditional 1.5, its In, f2 is the effective focal length of the second lens, and R3 is the radius of curvature of the thing side of the second lens.More specifically, f2 and R3 enter one Step can meet 1.7 ＜ f2/R3 ＜ 2.5, for example, 1.73≤f2/R3≤2.46., can be with by rationally controlling f2 and R3 ratio So that the thing side of the second lens and image side surface undertake rational focal power, so as to ensure that the second lens meet system optics While performance requirement, there is alap susceptibility.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ f6/R12 of conditional -2 ＜ -1, its In, f6 is the effective focal length of the 6th lens, and R12 is the radius of curvature of the image side surface of the 6th lens.More specifically, f6 and R12 enter One step can meet -1.90 ＜ f6/R12 ＜ -1.50, for example, -1.83≤f6/R12≤- 1.56.By rationally controlling f6/R12's Ratio so that the astigmatism contribution amount of the 6th lens image side surface in the reasonable scope, and the astigmatism contribution of the 6th lens image side surface Amount can preferably balance the astigmatism amount that each lens (that is, each lens between thing side and the 6th lens) in front side are accumulated, so as to So that optical imaging system is respectively provided with good image quality in meridian plane and sagittal surface.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ CT4/CT5 ＜ 2.0 of conditional 0.5, Wherein, CT4 be the 4th lens in the center thickness on optical axis, CT5 is the 5th lens in the center thickness on optical axis.More specifically Ground, CT4 and CT5 can further meet 0.9 ＜ CT4/CT5 ＜ 1.7, for example, 0.98≤CT4/CT5≤1.59.By rationally controlling The ratio of the center thickness of the 4th lens and the 5th lens is made, the distortion contribution amount of the 4th lens and the 5th lens can be controlled In the reasonable scope so that the final amount of distortion of each visual field is all controlled in less than 3%, so as to avoid the later stage from carrying out software debugging Needs.

In the exemplary embodiment, the optical imaging lens of the application can meet conditional TTL/ImgH≤1.5, its In, TTL is the optics total length of optical imaging lens (that is, from the center of the thing side of the first lens to optical imaging lens Distance of the imaging surface on optical axis), ImgH is the half of effective pixel area diagonal line length on imaging surface.More specifically, TTL and ImgH can further meet 1.43≤TTL/ImgH≤1.46.By rationally controlling TTL and ImgH ratio, be advantageous to optics into As camera lens ultrathin and high pixel while realize.

In the exemplary embodiment, the optical imaging lens of the application can meet the ＜ of conditional 1.5 (R5+R6)/(R5- R6)≤80, wherein, R5 is the radius of curvature of the thing side of the 3rd lens, and R6 is the radius of curvature of the image side surface of the 3rd lens.More Specifically, R5 and R6 can further meet 1.68≤(R5+R6)/(R5-R6)≤79.1.By rationally controlling the 3rd lens thing side Face and the radius of curvature of image side surface, can be by the coma contribution amount control of the 3rd lens in the reasonable scope, so that on axle The outer visual field of visual field and axle will not produce obvious degeneration as matter due to the contribution of coma.

In the exemplary embodiment, the optical imaging lens of the application can meet conditional | R13/R14 |≤2, wherein, R13 is the radius of curvature of the thing side of the 7th lens, and R14 is the radius of curvature of the image side surface of the 7th lens.More specifically, R13 It can further meet 1.3 ＜ with R14 | R13/R14 |≤2, for example, 1.37≤| R13/R14 |≤1.91.Rationally control the 7th is saturating The ratio of the radius of curvature of mirror thing side and image side surface, be advantageous to the accurate control of visual field aberration in lift shaft.

In the exemplary embodiment, optical imaging lens may also include at least one diaphragm, further to lift camera lens Image quality.For example, diaphragm may be provided between thing side and the first lens.

Alternatively, above-mentioned optical imaging lens may also include optical filter for correcting color error ratio and/or for protecting The protective glass of photo-sensitive cell on imaging surface.

Multi-disc eyeglass, such as described above seven can be used according to the optical imaging lens of the above-mentioned embodiment of the application Piece.Pass through spacing on the axle between each power of lens of reasonable distribution, face type, the center thickness of each lens and each lens Deng, can effectively reduce camera lens volume, reduce camera lens susceptibility and improve the machinability of camera lens so that optical imaging lens Head is more beneficial for producing and processing and being applicable to portable type electronic product.Meanwhile by the optical imaging lens of above-mentioned configuration, Also there is the beneficial effect such as ultra-thin, large aperture, high pixel, high image quality.

In presently filed embodiment, at least one in the minute surface of each lens is aspherical mirror.Non-spherical lens The characteristics of be：From lens centre to lens perimeter, curvature is consecutive variations.It is constant with having from lens centre to lens perimeter The spherical lens of curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve picture The advantages of dissipating aberration.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve Image quality.

However, it will be understood by those of skill in the art that without departing from this application claims technical scheme situation Under, the lens numbers for forming optical imaging lens can be changed, to obtain each result and advantage described in this specification.Example Such as, although being described in embodiments by taking seven lens as an example, the optical imaging lens are not limited to include seven Lens.If desired, the optical imaging lens may also include the lens of other quantity.

The specific embodiment for the optical imaging lens for being applicable to above-mentioned embodiment is further described with reference to the accompanying drawings.

Embodiment 1

Optical imaging lens referring to Fig. 1 to Fig. 2 D descriptions according to the embodiment of the present application 1.Fig. 1 is shown according to this Apply for the structural representation of the optical imaging lens of embodiment 1.

As shown in figure 1, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have negative power, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 1 show the surface types of each lens of the optical imaging lens of embodiment 1, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 1

As shown in Table 1, the thing side of any one lens in the first lens E1 to the 7th lens E7 and image side surface are It is aspherical.In the present embodiment, the face type x of each non-spherical lens is available but is not limited to following aspherical formula and is defined：

Wherein, x be it is aspherical along optical axis direction when being highly h position, away from aspheric vertex of surface apart from rise；C is Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the mean curvature radius R of upper table 1 inverse)；K be circular cone coefficient ( Provided in table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below is given available for each aspherical in embodiment 1 Minute surface S1-S14 high order term coefficient A₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Table 2

In embodiment 1, total effective focal length f=4.05mm of optical imaging lens；First lens E1 effective focal length f1 =-22.47mm；Second lens E2 effective focal length f2=2.77mm；3rd lens E3 effective focal length f3=-8.59mm；The Four lens E4 effective focal length f4=-293.01mm；5th lens E5 effective focal length f5=-1801.76mm；6th lens E6 Effective focal length f6=2.85mm；7th lens E7 effective focal length f7=-2.12mm.The optics total length of imaging lens is (i.e., Distance from the first lens E1 thing side S1 center to imaging surface S17 on optical axis) TTL=4.99mm.On imaging surface S17 The half ImgH=3.43mm of effective pixel area diagonal line length.

Optical imaging lens in embodiment 1 meet：

F/EPD=1.59, wherein, f is total effective focal length of optical imaging lens, and EPD is the entrance pupil of optical imaging lens Diameter；

| f/f4 |+| f/f5 |=0.02, wherein, f is total effective focal length of optical imaging lens, and f4 is the 4th lens E4's Effective focal length, f5 are the 5th lens E5 effective focal length；

F/f1=-0.18, wherein, f is total effective focal length of optical imaging lens, and f1 is the first lens E1 effective Jiao Away from；

F6/f7=-1.35, wherein, f6 is the 6th lens E6 effective focal length, and f7 is the 7th lens E7 effective focal length；

CT1/CT7=1.13, wherein, CT1 be the first lens E1 in the center thickness on optical axis, CT7 is the 7th lens E7 In the center thickness on optical axis；

F2/R3=1.88, wherein, f2 is the second lens E2 effective focal length, and R3 is the second lens E2 things side S3 song Rate radius；

F6/R12=-1.63, wherein, f6 is the 6th lens E6 effective focal length, and R12 is the 6th lens E6 image side surfaces S12 Radius of curvature；

CT4/CT5=1.40, wherein, CT4 be the 4th lens E4 in the center thickness on optical axis, CT5 is the 5th lens E5 In the center thickness on optical axis；

TTL/ImgH=1.45, wherein, TTL is the optics total length of optical imaging lens, and ImgH is to have on imaging surface S17 Imitate the half of pixel region diagonal line length；

(R5+R6)/(R5-R6)=3.44, wherein, R5 is the 3rd lens E3 things side S5 radius of curvature, and R6 is the 3rd Lens E3 image side surfaces S6 radius of curvature；

| R13/R14 |=1.76, wherein, R13 is the 7th lens E7 things side S13 radius of curvature, and R14 is the 7th lens E7 image side surfaces S14 radius of curvature.

In addition, Fig. 2A shows chromatic curve on the axle of the optical imaging lens of embodiment 1, it represents the light of different wave length Line deviates via the converging focal point after camera lens.Fig. 2 B show the astigmatism curve of the optical imaging lens of embodiment 1, and it represents son Noon curvature of the image and sagittal image surface bending.Fig. 2 C show the distortion curve of the optical imaging lens of embodiment 1, and it represents different Distortion sizes values in the case of visual angle.Fig. 2 D show the ratio chromatism, curve of the optical imaging lens of embodiment 1, and it represents light Line via the different image heights after camera lens on imaging surface deviation.Understood according to Fig. 2A to Fig. 2 D, the light given by embodiment 1 Good image quality can be realized by learning imaging lens.

Embodiment 2

Optical imaging lens referring to Fig. 3 to Fig. 4 D descriptions according to the embodiment of the present application 2.In the present embodiment and following In embodiment, for brevity, by clipped description similar to Example 1.Fig. 3 is shown according to the embodiment of the present application 2 Optical imaging lens structural representation.

As shown in figure 3, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is convex surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 3 show the surface types of each lens of the optical imaging lens of embodiment 2, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 3

As shown in Table 3, in example 2, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 4 shows the high order term coefficient available for each aspherical mirror in embodiment 2, wherein, it is each non- Spherical surface type can be limited by the formula (1) provided in above-described embodiment 1.

Table 4

In example 2, total effective focal length f=4.13mm of optical imaging lens；First lens E1 effective focal length f1 =-23.95mm；Second lens E2 effective focal length f2=2.63mm；3rd lens E3 effective focal length f3=-6.67mm；The Four lens E4 effective focal length f4=-90.96mm；5th lens E5 effective focal length f5=2571.93mm；6th lens E6's Effective focal length f6=2.82mm；7th lens E7 effective focal length f7=-2.03mm.The optics total length TTL=of imaging lens 4.99mm.The half ImgH=3.41mm of effective pixel area diagonal line length on imaging surface S17.

Fig. 4 A show chromatic curve on the axle of the optical imaging lens of embodiment 2, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Fig. 4 B show the astigmatism curve of the optical imaging lens of embodiment 2, and it represents meridian picture Face is bent and sagittal image surface bending.Fig. 4 C show the distortion curve of the optical imaging lens of embodiment 2, and it represents different visual angles In the case of distortion sizes values.Fig. 4 D show the ratio chromatism, curve of the optical imaging lens of embodiment 2, and it represents light warp By the deviation of the different image heights after camera lens on imaging surface.Understood according to Fig. 4 A to Fig. 4 D, optics given by embodiment 2 into As camera lens can realize good image quality.

Embodiment 3

The optical imaging lens according to the embodiment of the present application 3 are described referring to Fig. 5 to Fig. 6 D.Fig. 5 shows basis The structural representation of the optical imaging lens of the embodiment of the present application 3.

As shown in figure 5, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is convex surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have negative power, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 5 show the surface types of each lens of the optical imaging lens of embodiment 3, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 5

As shown in Table 5, in embodiment 3, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 6 shows the high order term coefficient available for each aspherical mirror in embodiment 3, wherein, it is each non- Spherical surface type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.3347E-02

1.8910E-02

-1.0709E-01

2.2944E-01

-3.4193E-01

3.2054E-01

-1.7552E-01

5.1287E-02

-6.1944E-03

S2

3.4283E-02

-2.7133E-01

3.0470E-01

-4.3235E-02

-2.3620E-01

2.9867E-01

-1.8199E-01

5.7982E-02

-7.6621E-03

S3

-9.6749E-02

3.6023E-02

-1.7794E-01

6.6117E-01

-9.9609E-01

8.7102E-01

-4.7048E-01

1.4614E-01

-1.9946E-02

S4

-1.3424E-01

4.4381E-01

-1.1695E+00

2.0909E+00

-2.4216E+00

1.7937E+00

-8.0713E-01

1.9638E-01

-1.9392E-02

S5

-1.7096E-01

4.4771E-01

-1.1228E+00

2.0208E+00

-2.3450E+00

1.6801E+00

-6.8004E-01

1.2174E-01

-2.3179E-03

S6

-4.1617E-02

2.6136E-02

2.3395E-01

-9.8981E-01

2.1987E+00

-2.8954E+00

2.2701E+00

-9.7225E-01

1.7488E-01

S7

-7.2990E-02

1.8948E-01

-9.1237E-01

2.6370E+00

-4.9576E+00

5.9987E+00

-4.5121E+00

1.9309E+00

-3.5776E-01

S8

-2.0525E-01

5.2312E-01

-1.7839E+00

4.1245E+00

-6.4044E+00

6.3489E+00

-3.8364E+00

1.2922E+00

-1.8620E-01

S9

-2.7913E-01

6.5373E-01

-2.1807E+00

5.1875E+00

-7.9514E+00

7.5714E+00

-4.3521E+00

1.3934E+00

-1.9287E-01

S10

-1.8289E-01

1.9114E-01

-6.9974E-01

1.6172E+00

-2.0951E+00

1.5941E+00

-7.1285E-01

1.7363E-01

-1.7738E-02

S11

1.1044E-02

-1.0992E-01

-2.3413E-01

6.0724E-01

-6.4656E-01

4.0119E-01

-1.5574E-01

3.5716E-02

-3.6443E-03

S12

1.1931E-01

-2.3498E-01

9.7435E-02

1.6646E-02

-1.8685E-02

2.7257E-03

6.3816E-04

-2.1628E-04

1.7033E-05

S13

-9.1644E-02

-1.9390E-01

2.6777E-01

-1.4000E-01

4.0788E-02

-7.2246E-03

7.7586E-04

-4.6510E-05

1.1916E-06

S14

-2.2049E-01

1.5818E-01

-8.0342E-02

3.0849E-02

-8.9927E-03

1.8666E-03

-2.5382E-04

1.9970E-05

-6.8145E-07

Table 6

In embodiment 3, total effective focal length f=4.12mm of optical imaging lens；First lens E1 effective focal length f1 =-24.37mm；Second lens E2 effective focal length f2=2.79mm；3rd lens E3 effective focal length f3=-8.04mm；The Four lens E4 effective focal length f4=44458.05mm；5th lens E5 effective focal length f5=-215.18mm；6th lens E6 Effective focal length f6=2.82mm；7th lens E7 effective focal length f7=-2.04mm.The optics total length TTL of imaging lens =4.99mm.The half ImgH=3.41mm of effective pixel area diagonal line length on imaging surface S17.

Fig. 6 A show chromatic curve on the axle of the optical imaging lens of embodiment 3, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Fig. 6 B show the astigmatism curve of the optical imaging lens of embodiment 3, and it represents meridian picture Face is bent and sagittal image surface bending.Fig. 6 C show the distortion curve of the optical imaging lens of embodiment 3, and it represents different visual angles In the case of distortion sizes values.Fig. 6 D show the ratio chromatism, curve of the optical imaging lens of embodiment 3, and it represents light warp By the deviation of the different image heights after camera lens on imaging surface.Understood according to Fig. 6 A to Fig. 6 D, optics given by embodiment 3 into As camera lens can realize good image quality.

Embodiment 4

The optical imaging lens according to the embodiment of the present application 4 are described referring to Fig. 7 to Fig. 8 D.Fig. 7 shows basis The structural representation of the optical imaging lens of the embodiment of the present application 4.

As shown in fig. 7, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is convex surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have negative power, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 7 show the surface types of each lens of the optical imaging lens of embodiment 4, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 7

As shown in Table 7, in example 4, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 8 shows the high order term coefficient available for each aspherical mirror in embodiment 4, wherein, it is each non- Spherical surface type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.6168E-02

1.8024E-02

-1.0344E-01

2.4222E-01

-3.9202E-01

3.9199E-01

-2.2759E-01

7.0602E-02

-9.0891E-03

S2

3.6539E-02

-2.7933E-01

3.9169E-01

-3.6760E-01

3.2052E-01

-2.2394E-01

9.6608E-02

-2.1283E-02

1.6825E-03

S3

-8.9458E-02

1.9309E-02

-7.2209E-02

2.7414E-01

-3.1397E-01

2.0295E-01

-9.2847E-02

2.9710E-02

-4.6057E-03

S4

-9.6279E-02

2.0207E-01

-4.0077E-01

5.5805E-01

-4.4455E-01

1.7978E-01

-2.3048E-02

-3.1382E-03

5.6909E-05

S5

-1.2560E-01

2.1811E-01

-4.4838E-01

7.4715E-01

-7.7012E-01

4.6044E-01

-1.5476E-01

2.9638E-02

-3.7639E-03

S6

-3.0435E-02

3.5316E-02

-4.5945E-02

2.4644E-01

-7.1155E-01

1.2193E+00

-1.2171E+00

6.5182E-01

-1.4344E-01

S7

-5.6803E-02

6.5976E-02

-2.7165E-01

3.8263E-01

-3.9366E-02

-7.4284E-01

1.1684E+00

-7.5859E-01

1.8879E-01

S8

-1.9005E-01

3.3524E-01

-1.1080E+00

2.8446E+00

-5.1424E+00

5.6319E+00

-3.5065E+00

1.1367E+00

-1.4756E-01

S9

-2.5361E-01

4.5207E-01

-1.6594E+00

4.9412E+00

-9.1864E+00

1.0078E+01

-6.4178E+00

2.2132E+00

-3.2379E-01

S10

-1.4686E-01

-3.7870E-02

-8.7226E-02

7.5466E-01

-1.4122E+00

1.2997E+00

-6.5853E-01

1.7639E-01

-1.9530E-02

S11

-2.7526E-01

1.6146E-01

3.6704E-02

-9.5536E-02

4.2590E-02

-6.0208E-03

0.0000E+00

S12

1.2133E-01

-2.3752E-01

8.8297E-02

3.9345E-02

-3.8440E-02

1.1556E-02

-1.5504E-03

7.1095E-05

1.3790E-06

S13

-8.6217E-02

-1.9336E-01

2.5886E-01

-1.3232E-01

3.7655E-02

-6.4998E-03

6.7801E-04

-3.9303E-05

9.6765E-07

S14

-2.1139E-01

1.4779E-01

-7.1994E-02

2.6006E-02

-7.1171E-03

1.4036E-03

-1.8425E-04

1.4184E-05

-4.7780E-07

Table 8

In example 4, total effective focal length f=4.09mm of optical imaging lens；First lens E1 effective focal length f1 =-24.31mm；Second lens E2 effective focal length f2=2.79mm；3rd lens E3 effective focal length f3=-8.33mm；The Four lens E4 effective focal length f4=-181.98mm；5th lens E5 effective focal length f5=-48.05mm；6th lens E6's Effective focal length f6=2.70mm；7th lens E7 effective focal length f7=-2.05mm.The optics total length TTL=of imaging lens 4.99mm.The half ImgH=3.41mm of effective pixel area diagonal line length on imaging surface S17.

Fig. 8 A show chromatic curve on the axle of the optical imaging lens of embodiment 4, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Fig. 8 B show the astigmatism curve of the optical imaging lens of embodiment 4, and it represents meridian picture Face is bent and sagittal image surface bending.Fig. 8 C show the distortion curve of the optical imaging lens of embodiment 4, and it represents different visual angles In the case of distortion sizes values.Fig. 8 D show the ratio chromatism, curve of the optical imaging lens of embodiment 4, and it represents light warp By the deviation of the different image heights after camera lens on imaging surface.Understood according to Fig. 8 A to Fig. 8 D, optics given by embodiment 4 into As camera lens can realize good image quality.

Embodiment 5

The optical imaging lens according to the embodiment of the present application 5 are described referring to Fig. 9 to Figure 10 D.Fig. 9 shows basis The structural representation of the optical imaging lens of the embodiment of the present application 5.

As shown in figure 9, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is convex surface.The Five lens E5 have negative power, and its thing side S9 is concave surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 9 show the surface types of each lens of the optical imaging lens of embodiment 5, radius of curvature, thickness, material and Circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 9

As shown in Table 9, in embodiment 5, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 10 shows the high order term coefficient available for each aspherical mirror in embodiment 5, wherein, respectively Aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.4162E-02

5.7748E-02

-2.4885E-01

4.9957E-01

-6.4202E-01

5.2015E-01

-2.5348E-01

6.7878E-02

-7.7092E-03

S2

3.1822E-02

-1.2643E-01

-3.8412E-01

1.5517E+00

-2.3968E+00

2.0884E+00

-1.0744E+00

3.0463E-01

-3.6778E-02

S3

-1.0092E-01

1.7283E-01

-8.2740E-01

2.1835E+00

-3.1118E+00

2.6894E+00

-1.4212E+00

4.2429E-01

-5.4970E-02

S4

-1.3303E-01

3.1426E-01

-3.5320E-01

-1.6224E-01

1.1118E+00

-1.5809E+00

1.1356E+00

-4.2156E-01

6.3694E-02

S5

-1.9378E-01

4.5734E-01

-9.4444E-01

1.5631E+00

-1.8658E+00

1.5004E+00

-7.5144E-01

2.0768E-01

-2.4379E-02

S6

-5.5010E-02

4.9491E-02

1.8831E-01

-8.1543E-01

1.7690E+00

-2.2744E+00

1.7307E+00

-7.0780E-01

1.1902E-01

S7

-1.0998E-01

5.6640E-01

-2.8299E+00

8.3504E+00

-1.5600E+01

1.8526E+01

-1.3541E+01

5.5565E+00

-9.7696E-01

S8

-1.4328E-01

2.9213E-01

-8.5159E-01

1.6030E+00

-2.2493E+00

2.1366E+00

-1.2245E+00

3.6966E-01

-4.2720E-02

S9

-2.2545E-01

3.3890E-01

-7.8969E-01

1.6158E+00

-2.5010E+00

2.4475E+00

-1.3812E+00

4.0233E-01

-4.5924E-02

S10

-1.8905E-01

1.0995E-01

-3.4507E-01

9.4376E-01

-1.4310E+00

1.2532E+00

-6.3756E-01

1.7504E-01

-2.0005E-02

S11

2.5686E-02

-2.2545E-01

5.2454E-02

2.1450E-01

-3.1933E-01

2.2434E-01

-9.3510E-02

2.2816E-02

-2.4758E-03

S12

1.2492E-01

-2.8009E-01

1.8577E-01

-6.5892E-02

2.6217E-02

-1.2303E-02

3.6861E-03

-5.5931E-04

3.3436E-05

S13

-7.6268E-02

-2.3763E-01

3.1601E-01

-1.6853E-01

5.0940E-02

-9.4819E-03

1.0843E-03

-7.0289E-05

1.9853E-06

S14

-2.1029E-01

1.4507E-01

-7.4013E-02

2.9432E-02

-8.9373E-03

1.9103E-03

-2.6344E-04

2.0753E-05

-7.0265E-07

Table 10

In embodiment 5, total effective focal length f=4.10mm of optical imaging lens；First lens E1 effective focal length f1 =-22.01mm；Second lens E2 effective focal length f2=2.82mm；3rd lens E3 effective focal length f3=-8.81mm；The Four lens E4 effective focal length f4=21.39mm；5th lens E5 effective focal length f5=-16.63mm；6th lens E6's has Imitate focal length f6=2.80mm；7th lens E7 effective focal length f7=-2.06mm.The optics total length TTL=of imaging lens 4.99mm.The half ImgH=3.48mm of effective pixel area diagonal line length on imaging surface S17.

Figure 10 A show chromatic curve on the axle of the optical imaging lens of embodiment 5, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Figure 10 B show the astigmatism curve of the optical imaging lens of embodiment 5, and it represents meridian Curvature of the image and sagittal image surface bending.Figure 10 C show the distortion curve of the optical imaging lens of embodiment 5, and it represents different Distortion sizes values in the case of visual angle.Figure 10 D show the ratio chromatism, curve of the optical imaging lens of embodiment 5, and it is represented Light via the different image heights after camera lens on imaging surface deviation.Understood according to Figure 10 A to Figure 10 D, given by embodiment 5 Optical imaging lens can realize good image quality.

Embodiment 6

The optical imaging lens according to the embodiment of the present application 6 are described referring to Figure 11 to Figure 12 D.Figure 11 shows root According to the structural representation of the optical imaging lens of the embodiment of the present application 6.

As shown in figure 11, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has positive light coke, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and its thing side S9 is convex surface, and image side surface S10 is convex surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 11 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging lens of embodiment 6 And circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 11

As shown in Table 11, in embodiment 6, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 12 shows the high order term coefficient available for each aspherical mirror in embodiment 6, wherein, respectively Aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.2889E-02

4.7161E-02

-1.9335E-01

3.5643E-01

-4.2013E-01

3.0922E-01

-1.3398E-01

3.0751E-02

-2.8264E-03

S2

3.3826E-02

-1.8203E-01

-9.8136E-02

8.8128E-01

-1.4946E+00

1.3443E+00

-7.0217E-01

2.0058E-01

-2.4272E-02

S3

-9.6313E-02

1.0493E-01

-5.1224E-01

1.4508E+00

-2.1143E+00

1.8498E+00

-9.8913E-01

2.9939E-01

-3.9432E-02

S4

-1.5348E-01

5.0151E-01

-1.1861E+00

1.9295E+00

-2.0631E+00

1.3909E+00

-5.3817E-01

9.7306E-02

-4.1887E-03

S5

-2.1002E-01

5.8987E-01

-1.4790E+00

2.8072E+00

-3.6360E+00

3.0546E+00

-1.5638E+00

4.3496E-01

-4.9704E-02

S6

-5.9768E-02

7.8530E-02

1.1554E-01

-7.4078E-01

1.8569E+00

-2.6441E+00

2.1996E+00

-9.8450E-01

1.8260E-01

S7

-8.8565E-02

3.3229E-01

-1.7354E+00

5.2165E+00

-9.8748E+00

1.1873E+01

-8.8072E+00

3.6846E+00

-6.6288E-01

S8

-1.9625E-01

5.2673E-01

-2.1109E+00

5.3058E+00

-8.6489E+00

8.9047E+00

-5.5457E+00

1.9006E+00

-2.7351E-01

S9

-2.4885E-01

5.5945E-01

-1.9703E+00

4.7594E+00

-7.3882E+00

7.1497E+00

-4.1559E+00

1.3251E+00

-1.7839E-01

S10

-1.4935E-01

5.2049E-02

-2.0983E-01

6.6192E-01

-1.0026E+00

8.5151E-01

-4.1939E-01

1.1200E-01

-1.2508E-02

S11

1.9567E-02

-1.9625E-01

6.8001E-02

1.0313E-01

-1.4513E-01

8.5535E-02

-3.1146E-02

7.5521E-03

-8.9247E-04

S12

1.1604E-01

-2.5499E-01

1.4976E-01

-3.4145E-02

7.6047E-03

-5.2307E-03

2.0416E-03

-3.4808E-04

2.1976E-05

S13

-7.2645E-02

-2.4346E-01

3.2011E-01

-1.7011E-01

5.1237E-02

-9.4885E-03

1.0769E-03

-6.9073E-05

1.9247E-06

S14

-1.9727E-01

1.2241E-01

-5.3670E-02

1.8386E-02

-5.0486E-03

1.0186E-03

-1.3555E-04

1.0403E-05

-3.4440E-07

Table 12

In embodiment 6, total effective focal length f=4.10mm of optical imaging lens；First lens E1 effective focal length f1 =-22.15mm；Second lens E2 effective focal length f2=2.78mm；3rd lens E3 effective focal length f3=-8.24mm；The Four lens E4 effective focal length f4=120.45mm；5th lens E5 effective focal length f5=142.42mm；6th lens E6's Effective focal length f6=2.98mm；7th lens E7 effective focal length f7=-2.07mm.The optics total length TTL=of imaging lens 4.99mm.The half ImgH=3.49mm of effective pixel area diagonal line length on imaging surface S17.

Figure 12 A show chromatic curve on the axle of the optical imaging lens of embodiment 6, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Figure 12 B show the astigmatism curve of the optical imaging lens of embodiment 6, and it represents meridian Curvature of the image and sagittal image surface bending.Figure 12 C show the distortion curve of the optical imaging lens of embodiment 6, and it represents different Distortion sizes values in the case of visual angle.Figure 12 D show the ratio chromatism, curve of the optical imaging lens of embodiment 6, and it is represented Light via the different image heights after camera lens on imaging surface deviation.Understood according to Figure 12 A to Figure 12 D, given by embodiment 6 Optical imaging lens can realize good image quality.

Embodiment 7

The optical imaging lens according to the embodiment of the present application 7 are described referring to Figure 13 to Figure 14 D.Figure 13 shows root According to the structural representation of the optical imaging lens of the embodiment of the present application 7.

As shown in figure 13, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is concave surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 13 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging lens of embodiment 7 And circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 13

As shown in Table 13, in embodiment 7, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 14 shows the high order term coefficient available for each aspherical mirror in embodiment 7, wherein, respectively Aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Table 14

In embodiment 7, total effective focal length f=4.14mm of optical imaging lens；First lens E1 effective focal length f1 =-22.54mm；Second lens E2 effective focal length f2=2.80mm；3rd lens E3 effective focal length f3=-8.28mm；The Four lens E4 effective focal length f4=-1090.27mm；5th lens E5 effective focal length f5=282.81mm；6th lens E6 Effective focal length f6=2.79mm；7th lens E7 effective focal length f7=-2.00mm.The optics total length TTL of imaging lens =4.99mm.The half ImgH=3.48mm of effective pixel area diagonal line length on imaging surface S17.

Figure 14 A show chromatic curve on the axle of the optical imaging lens of embodiment 7, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Figure 14 B show the astigmatism curve of the optical imaging lens of embodiment 7, and it represents meridian Curvature of the image and sagittal image surface bending.Figure 14 C show the distortion curve of the optical imaging lens of embodiment 7, and it represents different Distortion sizes values in the case of visual angle.Figure 14 D show the ratio chromatism, curve of the optical imaging lens of embodiment 7, and it is represented Light via the different image heights after camera lens on imaging surface deviation.Understood according to Figure 14 A to Figure 14 D, given by embodiment 7 Optical imaging lens can realize good image quality.

Embodiment 8

The optical imaging lens according to the embodiment of the present application 8 are described referring to Figure 15 to Figure 16 D.Figure 15 shows root According to the structural representation of the optical imaging lens of the embodiment of the present application 8.

As shown in figure 15, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has positive light coke, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 15 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging lens of embodiment 8 And circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 15

As shown in Table 15, in embodiment 8, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 16 shows the high order term coefficient available for each aspherical mirror in embodiment 8, wherein, respectively Aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.3851E-02

2.4308E-02

-9.3954E-02

1.5825E-01

-1.9274E-01

1.5963E-01

-8.1162E-02

2.2772E-02

-2.7159E-03

S2

-9.0807E-03

-1.6499E-01

2.9365E-01

-3.5015E-01

3.6199E-01

-2.8783E-01

1.4996E-01

-4.4254E-02

5.5432E-03

S3

-1.3231E-01

1.5382E-01

-2.7004E-01

5.8934E-01

-8.1559E-01

7.3230E-01

-4.2235E-01

1.4189E-01

-2.1070E-02

S4

-2.0954E-01

5.5538E-01

-9.0651E-01

8.7838E-01

-4.4566E-01

6.0552E-02

4.0697E-02

-1.5090E-02

3.2582E-04

S5

-3.3839E-01

6.5536E-01

-7.4195E-01

5.5488E-02

1.2476E+00

-1.9759E+00

1.5019E+00

-5.9358E-01

9.7701E-02

S6

-3.1617E-02

-1.4859E-01

1.2218E+00

-3.8295E+00

7.2965E+00

-8.7909E+00

6.5648E+00

-2.7676E+00

5.0453E-01

S7

-9.1614E-02

3.2990E-01

-1.7443E+00

5.7434E+00

-1.2183E+01

1.6514E+01

-1.3794E+01

6.4662E+00

-1.2998E+00

S8

-1.7885E-01

2.8066E-01

-9.9251E-01

2.5979E+00

-4.6795E+00

5.3621E+00

-3.7165E+00

1.4223E+00

-2.3001E-01

S9

-2.3924E-01

4.3751E-01

-1.4155E+00

3.3717E+00

-5.3032E+00

5.1761E+00

-3.0107E+00

9.5057E-01

-1.2440E-01

S10

-1.7938E-01

1.9148E-01

-4.6466E-01

9.3545E-01

-1.1970E+00

9.3417E-01

-4.3515E-01

1.1142E-01

-1.2034E-02

S11

-3.6485E-02

-7.9734E-02

-1.7313E-03

8.8564E-02

-8.6547E-02

3.3314E-02

-4.4911E-03

0.0000E+00

S12

1.1102E-01

-2.8331E-01

2.2606E-01

-1.1664E-01

5.6327E-02

-2.1981E-02

5.3840E-03

-7.0714E-04

3.8048E-05

S13

-1.0233E-01

-1.7092E-01

2.3671E-01

-1.1636E-01

3.0670E-02

-4.6851E-03

4.0171E-04

-1.6398E-05

1.6554E-07

S14

-2.0930E-01

1.5863E-01

-8.7860E-02

3.6798E-02

-1.1364E-02

2.4215E-03

-3.3081E-04

2.5833E-05

-8.7002E-07

Table 16

In embodiment 8, total effective focal length f=4.05mm of optical imaging lens；First lens E1 effective focal length f1 =-23.29mm；Second lens E2 effective focal length f2=3.54mm；3rd lens E3 effective focal length f3=537.79mm；The Four lens E4 effective focal length f4=-83.83mm；5th lens E5 effective focal length f5=177.55mm；6th lens E6's Effective focal length f6=2.61mm；7th lens E7 effective focal length f7=-1.93mm.The optics total length TTL=of imaging lens 4.97mm.The half ImgH=3.41mm of effective pixel area diagonal line length on imaging surface S17.

Figure 16 A show chromatic curve on the axle of the optical imaging lens of embodiment 8, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Figure 16 B show the astigmatism curve of the optical imaging lens of embodiment 8, and it represents meridian Curvature of the image and sagittal image surface bending.Figure 16 C show the distortion curve of the optical imaging lens of embodiment 8, and it represents different Distortion sizes values in the case of visual angle.Figure 16 D show the ratio chromatism, curve of the optical imaging lens of embodiment 8, and it is represented Light via the different image heights after camera lens on imaging surface deviation.Understood according to Figure 16 A to Figure 16 D, given by embodiment 8 Optical imaging lens can realize good image quality.

Embodiment 9

The optical imaging lens according to the embodiment of the present application 9 are described referring to Figure 17 to Figure 18 D.Figure 17 shows root According to the structural representation of the optical imaging lens of the embodiment of the present application 9.

As shown in figure 17, according to the optical imaging lens of the application illustrative embodiments along optical axis by thing side to image side according to Sequence includes：It is diaphragm STO, the first lens E1, the second lens E2, the 3rd lens E3, the 4th lens E4, the 5th lens E5, the 6th saturating Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has negative power, and its thing side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Positive light coke, its thing side S3 are convex surface, and image side surface S4 is concave surface.3rd lens E3 has negative power, and its thing side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and its thing side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and its thing side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its thing side S11 is convex surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and its thing side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has thing side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 17 shows surface type, radius of curvature, thickness, the material of each lens of the optical imaging lens of embodiment 9 And circular cone coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).

Table 17

As shown in Table 17, in embodiment 9, the thing side of any one lens in the first lens E1 to the 7th lens E7 It is aspherical with image side surface.Table 18 shows the high order term coefficient available for each aspherical mirror in embodiment 9, wherein, respectively Aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.9879E-02

1.1638E-02

-8.1609E-02

1.5796E-01

-1.9806E-01

1.5333E-01

-6.9499E-02

1.6981E-02

-1.7373E-03

S2

5.0252E-02

-3.3824E-01

4.5984E-01

-2.8824E-01

3.9978E-02

7.0726E-02

-5.3591E-02

1.6134E-02

-1.8702E-03

S3

-8.4367E-02

-2.7909E-03

-1.1180E-01

5.5157E-01

-8.5441E-01

7.2852E-01

-3.7005E-01

1.0534E-01

-1.3009E-02

S4

-7.2065E-02

1.3849E-01

-1.8578E-01

1.3689E-01

-3.3113E-02

-1.5509E-02

1.0407E-02

-1.8602E-03

3.1829E-05

S5

-1.3709E-01

1.8255E-01

-1.8603E-01

1.5184E-01

-1.2690E-01

1.3225E-01

-1.0070E-01

3.9335E-02

-5.9472E-03

S6

-4.4370E-02

-3.5029E-03

2.7184E-01

-6.6744E-01

9.4673E-01

-8.3373E-01

4.6174E-01

-1.4746E-01

2.1881E-02

S7

-6.6487E-02

1.2338E-01

-5.6003E-01

1.4579E+00

-2.5752E+00

3.0124E+00

-2.2132E+00

9.2210E-01

-1.6440E-01

S8

-1.5149E-01

1.7065E-01

-6.9053E-01

2.3235E+00

-5.0005E+00

6.1163E+00

-4.1774E+00

1.4936E+00

-2.1814E-01

S9

-2.0806E-01

2.8381E-01

-1.0113E+00

3.1279E+00

-6.0281E+00

6.6723E+00

-4.1647E+00

1.3645E+00

-1.8260E-01

S10

-1.1448E-01

-5.3816E-02

1.1643E-01

1.1082E-01

-4.8469E-01

5.5720E-01

-3.1461E-01

8.9532E-02

-1.0243E-02

S11

1.1556E-02

-1.7534E-01

1.4020E-01

-4.4589E-02

-1.5847E-02

1.3469E-02

-2.2079E-03

0.0000E+00

S12

8.4619E-02

-2.1635E-01

1.7791E-01

-1.0490E-01

5.7918E-02

-2.3469E-02

5.6958E-03

-7.3226E-04

3.8455E-05

S13

-9.7517E-02

-1.5386E-01

2.0407E-01

-9.3814E-02

2.2261E-02

-2.8077E-03

1.4886E-04

2.6646E-06

-4.5491E-07

S14

-2.0330E-01

1.3596E-01

-7.1613E-02

3.0778E-02

-1.0033E-02

2.2435E-03

-3.1769E-04

2.5470E-05

-8.7539E-07

Table 18

In embodiment 9, total effective focal length f=3.99mm of optical imaging lens；First lens E1 effective focal length f1 =-25.51mm；Second lens E2 effective focal length f2=2.97mm；3rd lens E3 effective focal length f3=-11.83mm；The Four lens E4 effective focal length f4=-45.58mm；5th lens E5 effective focal length f5=47.68mm；6th lens E6's has Imitate focal length f6=2.90mm；7th lens E7 effective focal length f7=-2.13mm.The optics total length TTL=of imaging lens 4.99mm.The half ImgH=3.41mm of effective pixel area diagonal line length on imaging surface S17.

Figure 18 A show chromatic curve on the axle of the optical imaging lens of embodiment 9, and it represents the light warp of different wave length Deviateed by the converging focal point after camera lens.Figure 18 B show the astigmatism curve of the optical imaging lens of embodiment 9, and it represents meridian Curvature of the image and sagittal image surface bending.Figure 18 C show the distortion curve of the optical imaging lens of embodiment 9, and it represents different Distortion sizes values in the case of visual angle.Figure 18 D show the ratio chromatism, curve of the optical imaging lens of embodiment 9, and it is represented Light via the different image heights after camera lens on imaging surface deviation.Understood according to Figure 18 A to Figure 18 D, given by embodiment 9 Optical imaging lens can realize good image quality.

To sum up, embodiment 1 to embodiment 9 meets the relation shown in table 19 respectively.

Conditional/embodiment	1	2	3	4	5	6	7	8	9
										f/EPD	1.59	1.59	1.59	1.59	1.58	1.58	1.58	1.60	1.46
\|f/f4\|+\|f/f5\|	0.02	0.05	0.02	0.11	0.44	0.06	0.02	0.07	0.17
										f/f1	-0.18	-0.17	-0.17	-0.17	-0.19	-0.18	-0.18	-0.17	-0.16
f6/f7	-1.35	-1.39	-1.38	-1.32	-1.36	-1.44	-1.39	-1.35	-1.36
										CT1/CT7	1.13	1.03	1.00	1.00	1.00	1.01	1.00	1.17	1.27
f2/R3	1.88	1.73	1.81	1.79	1.87	1.85	1.85	2.46	1.99
										f6/R12	-1.63	-1.58	-1.64	-1.56	-1.61	-1.71	-1.83	-1.71	-1.65
CT4/CT5	1.40	0.98	1.28	1.01	1.59	1.14	1.09	1.29	1.33
										TTL/ImgH	1.45	1.46	1.46	1.46	1.44	1.43	1.44	1.46	1.46
(R5+R6)/(R5-R6)	3.44	1.68	2.94	3.08	3.29	3.10	3.19	79.10	4.76
										\|R13/R14\|	1.76	1.74	1.69	1.71	1.76	1.85	1.91	1.65	1.37

Table 19

The application also provides a kind of imaging device, and its electronics photo-sensitive cell can be photosensitive coupling element (CCD) or complementation Property matal-oxide semiconductor element (CMOS).Imaging device can be such as digital camera independent imaging equipment or The image-forming module being integrated on the mobile electronic devices such as mobile phone.The imaging device is equipped with optical imaging lens described above Head.

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art Member should be appreciated that invention scope involved in the application, however it is not limited to the technology that the particular combination of above-mentioned technical characteristic forms Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein The technical scheme that the technical characteristic of energy is replaced mutually and formed.

Claims

1. optical imaging lens, sequentially included by thing side to image side along optical axis：It is the first lens with focal power, second saturating Mirror, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, it is characterised in that

First lens have negative power, and its thing side is convex surface, and image side surface is concave surface；

The image side surface of 3rd lens is concave surface；

The thing side of 7th lens is concave surface；

Wherein, total effective focal length f of the optical imaging lens, the effective focal length f4 of the 4th lens and the 5th lens Effective focal length f5 meet | f/f4 |+| f/f5 | ＜ 1.

2. optical imaging lens according to claim 1, it is characterised in that total effective focal length of the optical imaging lens F and the optical imaging lens Entry pupil diameters EPD meet f/EPD≤1.60.

3. optical imaging lens according to claim 1 or 2, it is characterised in that the effective focal length f1 of first lens Meet -0.5 ＜ f/f1 ＜ 0 with total effective focal length f of the optical imaging lens.

4. optical imaging lens according to claim 1 or 2, it is characterised in that the effective focal length f2 of second lens Meet 1.5 ＜ f2/R3 ＜ 2.5 with the radius of curvature R 3 of the thing side of second lens.

5. optical imaging lens according to claim 1 or 2, it is characterised in that the effective focal length f6 of the 6th lens Meet -2 ＜ f6/R12 ＜ -1 with the radius of curvature R 12 of the image side surface of the 6th lens.

6. optical imaging lens according to claim 5, it is characterised in that the effective focal length f6 of the 6th lens and institute The effective focal length f7 for stating the 7th lens meets -1.5 ＜ f6/f7 ＜ -1.

7. optical imaging lens according to claim 1 or 2, it is characterised in that the 4th lens are on the optical axis Center thickness CT4 and the 5th lens meet 0.5 ＜ CT4/CT5 ＜ 2.0 in the center thickness CT5 on the optical axis.

8. optical imaging lens according to claim 7, it is characterised in that first lens are on the optical axis Heart thickness CT1 meets 1.00≤CT1/CT7 ＜ 1.50 with the 7th lens in the center thickness CT7 on the optical axis.

9. optical imaging lens according to claim 7, it is characterised in that the optics total length of the optical imaging lens TTL and effective pixel area diagonal line length on the optical imaging lens imaging surface half ImgH meet TTL/ImgH≤1.5.

10. optical imaging lens according to claim 1 or 2, it is characterised in that the song of the thing side of the 3rd lens Rate radius R5 and the image side surface of the 3rd lens radius of curvature R 6 meet 1.5 ＜ (R5+R6)/(R5-R6)≤80.

11. optical imaging lens according to claim 1 or 2, it is characterised in that the song of the thing side of the 7th lens Rate radius R13 and the image side surface of the 7th lens radius of curvature R 14 meet | R13/R14 |≤2.

12. optical imaging lens, sequentially included by thing side to image side along optical axis：It is the first lens with focal power, second saturating Mirror, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, it is characterised in that

The thing side of first lens is convex surface, and image side surface is concave surface；

The image side surface of 3rd lens is concave surface；

The thing side of 7th lens is concave surface；

Wherein, first lens in the center thickness CT1 on the optical axis and the 7th lens on the optical axis Heart thickness CT7 meets 1.00≤CT1/CT7 ＜ 1.50.