Optical imaging lens

Abstract

The application provides an optical imaging lens. The optical imaging lens comprises a first lens with positive refractive power, a convex object side surface of the first lens, and a concave image side surface of the first lens; a second lens with negative refractive power, a convex object side surface of the second lens, and a concave image side surface of the second lens; a third lens with negative refractive power; a fourth lens with positive refractive power; a fifth lens with negative refractive power, a convex object side surface of the fifth lens, and a concave image side surface of the fifth lens; a sixth lens with positive refractive power; a seventh lens with negative refractive power, a concave object side surface of the seventh lens, and a concave image side surface of the seventh lens; and an axial distance TTL between the object side surface of the first lens and an imaging surface of the optical imaging lens and a half ImgH of a diagonal line length of an effective pixel area on the imaging surface satisfy TTL / ImgH<1.3. The application solves the problem that high image quality and miniaturization are difficult to be considered in the prior art.

Description

[0001] This application is a divisional application of the invention patent application with the application date of March 10, 2022, the application number of 2022102409756, and the invention name of Optical imaging lens. TECHNICAL FIELD

[0002] The present application relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. BACKGROUND

[0003] Recently, the requirements for mobile terminals are getting higher and higher, and the trend of high-definition of mobile terminals becomes more and more obvious with the continuous upgrading of market demand module technology, which leads to the increasing demand for the imaging quality of the imaging lens, while the weight of the mobile terminal is getting lighter and lighter, and the optical imaging lens in the prior art is difficult to balance high image quality and miniaturization.

[0004] That is, the optical imaging lens in the prior art has the problem of being difficult to balance high image quality and miniaturization. SUMMARY

[0005] The main purpose of the present application is to provide an optical imaging lens to solve the problem of the optical imaging lens in the prior art that is difficult to balance high image quality and miniaturization.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical imaging lens is provided, comprising: a first lens with positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; a second lens with negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens with negative refractive power; a fourth lens with positive refractive power; a fifth lens with negative refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave; a sixth lens with positive refractive power, the object side surface of the sixth lens is convex; a seventh lens with negative refractive power, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave; the half of the diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens ImgH and the axial distance from the object side surface of the first lens to the imaging surface TTL satisfy: 4.7mm<ImgH*ImgH / TTL<5.7mm.

[0007] Further, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 5.5mm<f*tan(FOV / 2)<6.7mm.

[0008] Further, the axial distance from the object side surface of the first lens to the imaging surface TTL and the half of the diagonal line length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH<1.3.

[0009] Further, an effective focal length f6 of the sixth lens and an effective focal length f1 of the first lens satisfy: 1.1 < f6 / f1 < 1.5.

[0010] Further, an effective focal length f5 of the fifth lens, an effective focal length f2 of the second lens and an effective focal length f3 of the third lens satisfy: 0.4 < f5 / (f2+f3) < 0.9.

[0011] Further, a curvature radius R1 of the object side surface of the first lens and a curvature radius R2 of the image side surface of the first lens satisfy: 1.4 < (R2+R1) / (R2-R1) < 2.0.

[0012] Further, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 2.2 < (R3+R4) / (R3-R4) < 3.7.

[0013] Further, an effective focal length f of the optical imaging lens, a curvature radius R9 of the object side surface of the fifth lens and a curvature radius R10 of the image side surface of the fifth lens satisfy: 2.1 < (R9+R10) / f < 2.6.

[0014] Further, a curvature radius R13 of the object side surface of the seventh lens and a curvature radius R14 of the image side surface of the seventh lens satisfy: 2.8 < (R13-R14) / (R13+R14) < 3.4.

[0015] Further, a combined focal length f12 of the first lens and the second lens, a central thickness CT1 of the first lens and a central thickness CT2 of the second lens satisfy: 6.5 < f12 / (CT1+CT2) < 7.2.

[0016] Further, an on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis of the optical imaging lens and the effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens, and an on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens satisfy: 3.6 < (SAG51+SAG52) / SAG42 < 4.6.

[0017] Further, an air gap T45 of the fourth lens and the fifth lens on the optical axis of the optical imaging lens, an air gap T56 of the fifth lens and the sixth lens on the optical axis and an air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.0 < (T45+T56) / T67 < 1.4.

[0018] Further, an edge thickness ET4 of the fourth lens, an edge thickness ET5 of the fifth lens, an edge thickness ET6 of the sixth lens, and an edge thickness ET7 of the seventh lens satisfy: 1.0 < (ET6+ET7) / (ET4+ET5) < 1.7.

[0019] According to another aspect of the present application, there is provided an optical imaging lens, comprising: a first lens having positive refractive power, an object side surface of the first lens being convex, an image side surface of the first lens being concave; a second lens having negative refractive power, an object side surface of the second lens being convex, an image side surface of the second lens being concave; a third lens having negative refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power, an object side surface of the fifth lens being convex, an image side surface of the fifth lens being concave; a sixth lens having positive refractive power, an object side surface of the sixth lens being convex; a seventh lens having negative refractive power, an object side surface of the seventh lens being concave, an image side surface of the seventh lens being concave; an on-axis distance TTL from the object side surface of the first lens to an image plane and a half of a diagonal line length of an effective pixel area on the image plane ImgH satisfy: TTL / ImgH < 1.3.

[0020] Further, an effective focal length f of the optical imaging lens and a maximum field angle FOV of the optical imaging lens satisfy: 5.5mm < f*tan(FOV / 2) < 6.7mm.

[0021] Further, an effective focal length f6 of the sixth lens and an effective focal length f1 of the first lens satisfy: 1.1 < f6 / f1 < 1.5.

[0022] Further, an effective focal length f5 of the fifth lens, an effective focal length f2 of the second lens, and an effective focal length f3 of the third lens satisfy: 0.4 < f5 / (f2+f3) < 0.9.

[0023] Further, a curvature radius R1 of the object side surface of the first lens and a curvature radius R2 of the image side surface of the first lens satisfy: 1.4 < (R2+R1) / (R2-R1) < 2.0.

[0024] Further, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 2.2 < (R3+R4) / (R3-R4) < 3.7.

[0025] Further, an effective focal length f of the optical imaging lens, a curvature radius R9 of the object side surface of the fifth lens, and a curvature radius R10 of the image side surface of the fifth lens satisfy: 2.1 < (R9+R10) / f < 2.6.

[0026] Further, a radius of curvature R13 of an object side surface of the seventh lens and a radius of curvature R14 of an image side surface of the seventh lens satisfy: 2.8 < (R13-R14) / (R13+R14) < 3.4.

[0027] Further, a combined focal length f12 of the first lens and the second lens, a central thickness CT1 of the first lens, and a central thickness CT2 of the second lens satisfy: 6.5 < f12 / (CT1+CT2) < 7.2.

[0028] Further, an on-axis distance SAG51 between an intersection of an object side surface of the fifth lens and an optical axis of the optical imaging lens and an effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 between an intersection of an image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens, and an on-axis distance SAG42 between an intersection of an image side surface of the fourth lens and the optical axis and an effective radius vertex of the image side surface of the fourth lens satisfy: 3.6 < (SAG51+SAG52) / SAG42 < 4.6.

[0029] Further, an air gap T45 of the fourth lens and the fifth lens on the optical axis of the optical imaging lens, an air gap T56 of the fifth lens and the sixth lens on the optical axis, and an air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.0 < (T45+T56) / T67 < 1.4.

[0030] Further, an edge thickness ET4 of the fourth lens, an edge thickness ET5 of the fifth lens, an edge thickness ET6 of the sixth lens, and an edge thickness ET7 of the seventh lens satisfy: 1.0 < (ET6+ET7) / (ET4+ET5) < 1.7.

[0031] By applying the technical solution of the present application, the optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has positive refractive power, an object side surface of the first lens is convex, and an image side surface of the first lens is concave. The second lens has negative refractive power, an object side surface of the second lens is convex, and an image side surface of the second lens is concave. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power, an object side surface of the fifth lens is convex, and an image side surface of the fifth lens is concave. The sixth lens has positive refractive power, an object side surface of the sixth lens is convex. The seventh lens has negative refractive power, an object side surface of the seventh lens is concave, and an image side surface of the seventh lens is concave. An on-axis distance TTL between the object side surface of the first lens and an imaging surface of the optical imaging lens and a half of a diagonal line length of an effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH < 1.3.

[0032] By distributing the refractive power of the lenses of the optical imaging lens and designing the surface shape of the lenses, the low-order aberrations of the optical imaging lens can be effectively balanced, and the sensitivity of the tolerance of the optical imaging lens can be reduced, the imaging quality of the optical imaging lens can be ensured while the miniaturization of the optical imaging lens is maintained. By limiting TTL / ImgH within a reasonable range, the total length of the optical imaging lens can be effectively reduced, which is conducive to the ultra-thin and miniaturization of the seven-piece optical imaging lens, so that the optical imaging lens can be better applied to ultra-thin electronic products. At the same time, by the positive refractive power of the first lens and the negative refractive power of the seventh lens, the aberrations of the edge field can be effectively reduced while the light flux is increased, and the distribution of the refractive power of the entire optical imaging lens can be facilitated by the negative refractive power of the second lens and the third lens and the positive refractive power of the fourth lens, so as to avoid excessive concentration of the refractive power. In addition, the combination of the negative-positive-negative refractive power of the fifth lens, the sixth lens and the seventh lens is conducive to increasing the light flux of the optical imaging lens, and the optical imaging lens has high relative luminance, so that the imaging quality of the optical imaging lens in a dark environment can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the application, and are incorporated herein for explanatory purposes. The illustrative embodiments of the present application and their description serve the purpose of explanations and are not intended to limit the present application. In the drawings:

[0034] Figure 1 A structure schematic view of the optical imaging lens of Example One of the present application is shown;

[0035] Figures 2 to 5 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens in Example One are shown respectively; Figure 1

[0036] Figure 6 A structure schematic view of the optical imaging lens of Example Two of the present application is shown;

[0037] Figures 7 to 10 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens in Example Two are shown respectively; Figure 6

[0038] A structure schematic view of the optical imaging lens of Example Three of the present application is shown; Figure 11

[0039] The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens in Example Three are shown respectively; Figures 12 to 15 Figure 11

[0040] Figure 16 ​​​A structural diagram of an optical imaging lens of Example Four of the present application is shown.

[0041] Figures 17 to 20 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Figure 16

[0042] Wherein, the above-mentioned drawings include the following reference signs:

[0043] STO, stop; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; E7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens; E8, filter; S15, object side surface of the filter; S16, image side surface of the filter; S17, imaging surface. DETAILED DESCRIPTION

[0044] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0046] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0047] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0048] ​It should be noted that in the present specification, the terms first, second, third, etc. are used only to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0049] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0050] In the present specification, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made in accordance with the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0051] In order to solve the problem that the optical imaging lens in the prior art cannot simultaneously achieve high image quality and miniaturization, the present application provides an optical imaging lens.

[0052] Embodiment one

[0053] As shown in Figures 1 to 20 The optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has positive refractive power, the object side surface of the sixth lens is convex. The seventh lens has negative refractive power, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave. The half of the diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens ImgH and the axial distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.7mm<ImgH*ImgH / TTL<5.7mm.

[0054] By distributing the refractive power of the lenses of the optical imaging lens and designing the surface shape of the lenses, the low-order aberrations of the optical imaging lens can be effectively balanced, and the sensitivity of the tolerance of the optical imaging lens can be reduced, the miniaturization of the optical imaging lens is maintained, and the imaging quality of the optical imaging lens is ensured. By controlling ImgH*ImgH / TTL within a reasonable range, the size of the optical imaging lens can be effectively reduced, which is conducive to the miniaturization of the optical imaging lens. At the same time, by the positive refractive power of the first lens and the negative refractive power of the seventh lens, the aberrations of the edge field can be effectively reduced while increasing the light flux, and because the second lens and the third lens have negative refractive power and the fourth lens has positive refractive power, the distribution of the refractive power of the entire optical imaging lens is facilitated, and excessive concentration of the refractive power is avoided. At the same time, the combination of the negative-positive-negative refractive power of the fifth lens, the sixth lens and the seventh lens is conducive to increasing the light flux of the optical imaging lens, has high relative luminance, and can well improve the imaging quality of the optical imaging lens in a dark environment.

[0055] Preferably, the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH and the axial distance TTL from the object side surface of the first lens to the imaging surface satisfy: 4.8mm<ImgH*ImgH / TTL<5.6mm. In the embodiment, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 5.5mm<f*tan(FOV / 2)<6.7mm. By controlling f*tan(FOV / 2) within a reasonable range, the image height of the optical imaging lens can be improved while avoiding excessive aberrations of the edge field, so that the optical imaging lens has a larger imaging range, and the imaging quality of the optical imaging lens is ensured. Preferably, 5.7mm<f*tan(FOV / 2)<6.6mm.

[0056] In the embodiment, the axial distance TTL from the object side surface of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH<1.3. By limiting TTL / ImgH within a reasonable range, the total length of the optical imaging lens can be effectively reduced, which is conducive to the ultra-thin and miniaturization of the seven-piece optical imaging lens, so that the optical imaging lens can be better applied to ultra-thin electronic products. Preferably, 1.1<TTL / ImgH<1.3.

[0057] In the embodiment, the effective focal length f6 of the sixth lens and the effective focal length f1 of the first lens satisfy: 1.1 < f6 / f1 < 1.5. By reasonably allocating the effective focal length of the first lens and the effective focal length of the sixth lens, the optical imaging lens can be more effectively shortened in size, while avoiding excessive concentration of the refractive power of the optical imaging lens, cooperating with the first four lenses to make the aberration of the optical imaging lens better corrected, and ensuring the imaging quality of the optical imaging lens. Preferably, 1.2 < f6 / f1 < 1.4.

[0058] In the embodiment, the effective focal length f5 of the fifth lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy: 0.4 < f5 / (f2+f3) < 0.9. Reasonably controlling the effective focal lengths of the second lens, the third lens and the fifth lens can effectively reduce the size of the optical imaging lens, while avoiding excessive concentration of the refractive power of the optical imaging lens on the second lens and the third lens, and can also control the spherical aberration contribution of the first three lenses within a reasonable range to make the optical imaging lens obtain better imaging quality. Preferably, 0.5 < f5 / (f2+f3) < 0.8.

[0059] In the embodiment, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1.4 < (R2+R1) / (R2-R1) < 2.0. By limiting (R2+R1) / (R2-R1) within a reasonable range, the light rays have a certain divergence function when passing through the object side surface of the first lens, which can help to reduce the TTL / EFL ratio while maintaining the image quality of the optical imaging lens, and also helps the optical imaging lens to obtain a smaller Fno. In addition, the conventional fourth reflection of the first lens can be optimized to reduce the risk of ghost image of the optical imaging lens at the bottom of the imaging surface. Preferably, 1.5 < (R2+R1) / (R2-R1) < 1.9.

[0060] In the embodiment, the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 2.2 < (R3+R4) / (R3-R4) < 3.7. By reasonably allocating the curvature radii of the object side surface and the image side surface of the second lens, the astigmatism and coma between the second lens and the following several lenses can be effectively balanced, and by limiting f5 / (f2+f3) within a reasonable range, the optical imaging lens can maintain better imaging quality, while helping to improve the image height of the optical imaging lens on the imaging surface to realize high-definition imaging. Preferably, 2.3 < (R3+R4) / (R3-R4) < 3.6.

[0061] In the embodiment, the effective focal length f of the optical imaging lens, the radius of curvature R9 of the object side surface of the fifth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.1 < (R9+R10) / f < 2.6. By reasonably adjusting the effective focal length of the fifth lens and the entire optical imaging lens, at least two advantages are obtained. The first advantage is that the refractive power of the optical imaging lens can be more reasonably distributed, so as not to be excessively concentrated on the front few lenses, which is beneficial to improving the imaging quality of the optical imaging lens and reducing the sensitivity of the optical imaging lens. The second advantage is to maintain the light and thin characteristics of the optical imaging lens, and is beneficial to correcting the spherical aberration of the entire system. Preferably, 2.15 < (R9+R10) / f < 2.5.

[0062] In the embodiment, the radius of curvature R13 of the object side surface of the seventh lens and the radius of curvature R14 of the image side surface of the seventh lens satisfy: 2.8 < (R13-R14) / (R13+R14) < 3.4. By limiting (R13-R14) / (R13+R14) within a reasonable range, the shape of the seventh lens can be controlled, which is beneficial to the molding of the seventh lens, reduces the sensitivity of the seventh lens, and at the same time can improve the stray light at the tail end of the optical imaging lens through the shape of the seventh lens, and ensure the imaging quality of the optical imaging lens. Preferably, 2.9 < (R13-R14) / (R13+R14) < 3.3.

[0063] In the embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy: 6.5 < f12 / (CT1+CT2) < 7.2. By controlling f12 / (CT1+CT2) within a reasonable range, it is beneficial to control the simplification of the processing technology of the first lens and the second lens, and at the same time can reduce the size of the head part to a certain extent and reduce the sensitivity of the lens. Preferably, 6.6 < f12 / (CT1+CT2) < 7.1.

[0064] In the embodiment, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis of the optical imaging lens and the effective radius vertex of the object side surface of the fifth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens, and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens satisfy: 3.6<(SAG51+SAG52) / SAG42<4.6. By controlling (SAG51+SAG52) / SAG42 within a reasonable range, the light rays can be well converged, the refractive power of the lenses can be reasonably distributed, the field of view angle can be increased on the basis of good convergence, and meanwhile the light rays can be transmitted gently in the optical path and the deflection angle of the light rays can be compressed, which is beneficial to the machining of the later lenses. Preferably, 3.8<(SAG51+SAG52) / SAG42<4.4.

[0065] In the embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 1.0<(T45+T56) / T67<1.4. By controlling (T45+T56) / T67 within a reasonable range, the light leakage at the edge field of view can be improved, the stray light and ghost image can be improved, and on this basis, the illumination of the imaging surface can be improved, and the imaging quality of the optical imaging lens can be ensured. Preferably, 1.1<(T45+T56) / T67<1.3.

[0066] In the embodiment, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET7 of the seventh lens satisfy: 1.0<(ET6+ET7) / (ET4+ET5)<1.7. By limiting (ET6+ET7) / (ET4+ET5) within a reasonable range, the shape of the fourth lens and the fifth lens can be optimized, the processability of the fifth lens can be enhanced, and meanwhile controlling the edge thickness of the sixth lens and the seventh lens can improve the astigmatism of the optical imaging lens, and can also weaken the ghost image intensity generated by the reflection of the sixth lens and the seventh lens, thereby ensuring the imaging quality of the optical imaging lens. Preferably, 1.1<(ET6+ET7) / (ET4+ET5)<1.7.

[0067] Embodiment Two

[0068] As Figures 1 to 20As shown, the optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the second lens has negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has negative refractive power; the fourth lens has positive refractive power; the fifth lens has negative refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave; the sixth lens has positive refractive power, the object side surface of the sixth lens is convex; the seventh lens has negative refractive power, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave; the axial distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal line length ImgH of the effective pixel area on the imaging surface satisfy: TTL / ImgH<1.3.

[0069] By distributing the refractive power of the lenses of the optical imaging lens and designing the surface shape of the lenses, the low-order aberrations of the optical imaging lens can be effectively balanced, and the sensitivity of the tolerance of the optical imaging lens can be reduced. The imaging quality of the optical imaging lens is ensured while the miniaturization of the optical imaging lens is maintained. By limiting TTL / ImgH within a reasonable range, the total length of the optical imaging lens can be effectively reduced, which is conducive to the ultra-thin and miniaturization of the seven-piece optical imaging lens, so that the optical imaging lens can be better applied to ultra-thin electronic products. At the same time, by the positive refractive power of the first lens and the negative refractive power of the seventh lens, the light flux can be increased while the aberration of the edge field is effectively reduced. Since the second lens and the third lens have negative refractive power and the fourth lens has positive refractive power, the distribution of the refractive power of the entire optical imaging lens is facilitated, and excessive concentration of the refractive power is avoided. In combination with the negative-positive-negative refractive power of the fifth lens, the sixth lens and the seventh lens, the light flux of the optical imaging lens can be increased, the relative luminance is high, and the imaging quality of the optical imaging lens in a dark environment can be improved.

[0070] Preferably, the axial distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal line length ImgH of the effective pixel area on the imaging surface satisfy: 1.1<TTL / ImgH<1.3.

[0071] In this embodiment, the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 5.5mm<f*tan(FOV / 2)<6.7mm. By controlling f*tan(FOV / 2) within a reasonable range, the image height of the optical imaging lens can be improved while avoiding excessive aberration of the edge field, so that the optical imaging lens has a larger imaging range, and the imaging quality of the optical imaging lens is ensured. Preferably, 5.7mm<f*tan(FOV / 2)<6.6mm.

[0072] In the embodiment, the effective focal length f6 of the sixth lens and the effective focal length f1 of the first lens satisfy: 1.1 < f6 / f1 < 1.5. By reasonably allocating the effective focal length of the first lens and the effective focal length of the sixth lens, the optical imaging lens can be more effectively shortened in size, while avoiding excessive concentration of the refractive power of the optical imaging lens, cooperating with the first four lenses to make the aberration of the optical imaging lens better corrected, and ensuring the imaging quality of the optical imaging lens. Preferably, 1.2 < f6 / f1 < 1.4.

[0073] In the embodiment, the effective focal length f5 of the fifth lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy: 0.4 < f5 / (f2+f3) < 0.9. Reasonably controlling the effective focal lengths of the second lens, the third lens and the fifth lens can effectively reduce the size of the optical imaging lens, while avoiding excessive concentration of the refractive power of the optical imaging lens on the second lens and the third lens, and can also control the spherical aberration contribution of the first three lenses within a reasonable range to make the optical imaging lens obtain better imaging quality. Preferably, 0.5 < f5 / (f2+f3) < 0.8.

[0074] In the embodiment, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1.4 < (R2+R1) / (R2-R1) < 2.0. By limiting (R2+R1) / (R2-R1) within a reasonable range, the light rays have a certain divergence function when passing through the object side surface of the first lens, which can help to reduce the TTL / EFL ratio while maintaining the image quality of the optical imaging lens, and also helps the optical imaging lens to obtain a smaller Fno. In addition, the conventional fourth reflection of the first lens can be optimized to reduce the risk of ghost image of the optical imaging lens at the bottom of the imaging surface. Preferably, 1.5 < (R2+R1) / (R2-R1) < 1.9.

[0075] In the embodiment, the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 2.2 < (R3+R4) / (R3-R4) < 3.7. By reasonably allocating the curvature radii of the object side surface and the image side surface of the second lens, the astigmatism and coma between the second lens and the following several lenses can be effectively balanced, and by limiting f5 / (f2+f3) within a reasonable range, the optical imaging lens can maintain better imaging quality, while helping to improve the image height of the optical imaging lens on the imaging surface to realize high-definition imaging. Preferably, 2.3 < (R3+R4) / (R3-R4) < 3.6.

[0076] In the embodiment, the effective focal length f of the optical imaging lens, the radius of curvature R9 of the object side surface of the fifth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.1 < (R9+R10) / f < 2.6. By reasonably adjusting the effective focal length of the fifth lens and the entire optical imaging lens, at least two advantages are obtained. The first advantage is that the refractive power of the optical imaging lens can be more reasonably distributed, so as not to be excessively concentrated on the front few lenses, which is beneficial to improving the imaging quality of the optical imaging lens and reducing the sensitivity of the optical imaging lens. The second advantage is to maintain the light and thin characteristics of the optical imaging lens, and is beneficial to correcting the spherical aberration of the entire system. Preferably, 2.15 < (R9+R10) / f < 2.5.

[0077] In the embodiment, the radius of curvature R13 of the object side surface of the seventh lens and the radius of curvature R14 of the image side surface of the seventh lens satisfy: 2.8 < (R13-R14) / (R13+R14) < 3.4. By limiting (R13-R14) / (R13+R14) within a reasonable range, the shape of the seventh lens can be controlled, which is beneficial to the molding of the seventh lens, reduces the sensitivity of the seventh lens, and at the same time can improve the stray light at the tail end of the optical imaging lens through the shape of the seventh lens, and ensure the imaging quality of the optical imaging lens. Preferably, 2.9 < (R13-R14) / (R13+R14) < 3.3.

[0078] In the embodiment, the combined focal length f12 of the first lens and the second lens, the center thickness CT1 of the first lens, and the center thickness CT2 of the second lens satisfy: 6.5 < f12 / (CT1+CT2) < 7.2. By controlling f12 / (CT1+CT2) within a reasonable range, it is beneficial to control the simplification of the processing technology of the first lens and the second lens, and at the same time can reduce the size of the head part to a certain extent and reduce the sensitivity of the lens. Preferably, 6.6 < f12 / (CT1+CT2) < 7.1.

[0079] In the embodiment, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis of the optical imaging lens and the effective radius vertex of the object side surface of the fifth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens, and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens satisfy: 3.6<(SAG51+SAG52) / SAG42<4.6. By controlling (SAG51+SAG52) / SAG42 within a reasonable range, the light rays can be well converged, the refractive power of the lenses can be reasonably distributed, the field of view can be increased on the basis of good convergence, the light rays can be transmitted gently in the optical path, the deflection angle of the light rays can be compressed, and the machining of the later lenses is facilitated. Preferably, 3.8<(SAG51+SAG52) / SAG42<4.4.

[0080] In the embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 1.0<(T45+T56) / T67<1.4. By controlling (T45+T56) / T67 within a reasonable range, the light leakage at the edge field of view can be improved, the stray light and ghost image can be improved, the illumination of the imaging surface can be increased on this basis, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.1<(T45+T56) / T67<1.3.

[0081] In the embodiment, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens, and the edge thickness ET7 of the seventh lens satisfy: 1.0<(ET6+ET7) / (ET4+ET5)<1.7. By limiting (ET6+ET7) / (ET4+ET5) within a reasonable range, the shapes of the fourth lens and the fifth lens can be optimized, the processability of the fifth lens can be enhanced, the astigmatism of the optical imaging lens can be improved by controlling the edge thicknesses of the sixth lens and the seventh lens, the ghost image intensity generated by the reflection of the sixth lens and the seventh lens can be weakened, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.1<(ET6+ET7) / (ET4+ET5)<1.7.

[0082] Optionally, the optical imaging lens described above can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive elements located on the imaging surface.

[0083] The optical imaging lens in the present application can adopt multiple lenses, for example, seven lenses as described above. By reasonably allocating the refractive power, surface shape, central thickness of each lens, and axial distance between each lens, etc., the imaging quality of the optical imaging lens can be effectively increased, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, so that the optical imaging lens is more conducive to production and processing and can be applied to portable electronic devices such as smart phones.

[0084] In the present application, at least one of the lens surfaces of each lens is a non-spherical surface. The characteristic of the aspherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens with constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, has the advantages of improving the distortion aberration and improving the astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0085] However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens can also include other numbers of lenses.

[0086] The specific surface shape and parameters of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0087] It should be noted that any one of the following examples 1 to 4 is applicable to all embodiments of the present application.

[0088] Example 1

[0089] As shown in FIG. 1, the optical imaging lens of example 1 of the present application is described. Figures 1 to 5 FIG. 2 shows a structural schematic diagram of the optical imaging lens of example 1. Figure 1

[0090] As shown in FIG. 1, the optical imaging lens of example 1 of the present application is described. Figure 1 The optical imaging lens includes, in order from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0091] ​The first lens E1 has positive refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has negative refractive power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens E3 has negative refractive power, the object side S5 of the third lens is concave, and the image side S6 of the third lens is concave. The fourth lens E4 has positive refractive power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is convex. The fifth lens E5 has negative refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is concave. The sixth lens E6 has positive refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is concave, and the image side S14 of the seventh lens is concave. The filter E8 has the object side S15 and the image side S16 of the filter. The light from the object sequentially passes through the surfaces S1-S16 and is finally imaged on the imaging surface S17.

[0092] In the present example, the image height ImgH of the optical imaging lens is 6.55 mm. The total track length TTL of the optical imaging lens is 7.83 mm.

[0093] Table 1 shows the basic structure parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, the thickness / distance, and the focal length are all millimeters (mm).

[0094]

[0095] Table 1

[0096] In Example 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0097]

[0098] wherein x is the distance sag of the aspherical surface at a height h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical surface S1-S14 in Example 1.

[0099] Face No. A4 A6 A8 A10 A12 A14 A16 S1 -7.6727E-04 1.0512E-02 -3.2303E-02 6.3614E-02 -8.0705E-02 6.7384E-02 -3.7297E-02 S2 -1.7423E-02 1.6238E-02 -2.1393E-02 3.8122E-02 -4.8425E-02 3.9000E-02 -1.9756E-02 S3 -1.5009E-02 1.7107E-02 9.0175E-03 -5.1781E-02 1.0214E-01 -1.2214E-01 9.3812E-02 S4 5.2042E-04 3.0233E-02 -9.4558E-02 2.8029E-01 -5.4327E-01 6.8965E-01 -5.7937E-01 S5 -2.0338E-02 -4.5631E-02 1.8846E-01 -4.5320E-01 7.1308E-01 -7.5642E-01 5.4318E-01 S6 -3.2869E-02 -2.7465E-03 2.2065E-02 -2.7665E-02 1.5656E-02 2.0907E-03 -9.5030E-03 S7 -2.8945E-02 6.6716E-03 -1.1192E-02 2.1877E-02 -2.6905E-02 2.1563E-02 -1.1426E-02 S8 -2.1173E-02 3.7152E-03 -6.4900E-04 -4.1561E-03 6.0940E-03 -4.4851E-03 2.0121E-03 S9 -4.6962E-02 1.0734E-02 3.9896E-03 -9.5192E-03 7.0501E-03 -3.1138E-03 8.9497E-04 S10 -6.9366E-02 1.7023E-02 4.9644E-04 -5.0426E-03 3.2300E-03 -1.0548E-03 1.6782E-04 S11 -2.0726E-02 -8.2850E-05 1.4819E-03 -8.7088E-04 2.3749E-04 -4.0504E-05 4.9216E-06 S12 6.5968E-03 -4.9052E-03 2.9111E-03 -1.2975E-03 3.6580E-04 -7.1262E-05 1.0215E-05 S13 -7.2486E-02 2.7845E-02 -7.2648E-03 1.3637E-03 -1.6736E-04 1.2147E-05 -3.3632E-07 S14 -7.8023E-02 2.8846E-02 -8.4222E-03 1.8472E-03 -3.0165E-04 3.6579E-05 -3.2877E-06 Face No. A18 A20 A22 A24 A26 A28 A30 S1 1.3522E-02 -3.0833E-03 4.0098E-04 -2.2689E-05 0.0000E+00 0.0000E+00 0.0000E+00 S2 6.0877E-03 -1.0282E-03 6.7447E-05 1.3581E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 -4.6335E-02 1.4231E-02 -2.4745E-03 1.8616E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 3.1962E-01 -1.1139E-01 2.2251E-02 -1.9435E-03 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.5976E-01 7.9059E-02 -1.3816E-02 1.0512E-03 0.0000E+00 0.0000E+00 0.0000E+00 S6 6.6454E-03 -2.3106E-03 4.1535E-04 -3.0850E-05 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.9460E-03 -8.4729E-04 1.0224E-04 -5.2883E-06 0.0000E+00 0.0000E+00 0.0000E+00 S8 -5.7138E-04 9.9889E-05 -9.6906E-06 3.9319E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.6751E-04 1.9526E-05 -1.2749E-06 3.5254E-08 0.0000E+00 0.0000E+00 0.0000E+00 S10 5.5270E-06 -8.7894E-06 2.0113E-06 -2.4710E-07 1.7896E-08 -7.2137E-10 1.2537E-11 S11 -4.4208E-07 2.9011E-08 -1.3512E-09 4.3134E-11 -9.0326E-13 1.1532E-14 -7.2482E-17 S12 -1.0948E-06 8.6722E-08 -4.9535E-09 1.9692E-10 -5.1479E-12 7.9367E-14 -5.4613E-16 S13 -2.5164E-08 3.3404E-09 -1.8511E-10 6.0998E-12 -1.2355E-13 1.4280E-15 -7.2441E-18 S14 2.1822E-07 -1.0610E-08 3.7197E-10 -9.1297E-12 1.4862E-13 -1.4397E-15 6.2752E-18

[0100] Table 2

[0101] Figure 2 On-axis chromatic aberration curves of the optical imaging lens of Example One are shown, which represent the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 3 Astigmatism curves of the optical imaging lens of Example One are shown, which represent the meridional image curvature and sagittal image curvature. Figure 4 Distortion curves of the optical imaging lens of Example One are shown, which represent the distortion size values corresponding to different field angles. Figure 5 Lateral chromatic aberration curves of the optical imaging lens of Example One are shown, which represent the deviation of light rays on the imaging plane after passing through the optical imaging lens at different image heights.

[0102] According to Figures 2 to 5 It can be known that the optical imaging lens of Example One can achieve good imaging quality.

[0103] Example Two

[0104] As Figures 6 to 10 shown, the optical imaging lens of Example Two of the present application is described. Figure 6 A structural schematic diagram of the optical imaging lens of Example Two is shown.

[0105] As Figure 6 shown, the optical imaging lens sequentially comprises a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17 from the object side to the image side.

[0106] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a concave surface. The sixth lens E6 has positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a concave surface. The seventh lens E7 has negative refractive power, the object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.

[0107] In the present example, the image height ImgH of the optical imaging lens is 6.55 mm. The total track length TTL of the optical imaging lens is 7.95 mm.

[0108] Table 3 shows the basic structure parameter table of the optical imaging lens of Example Two, wherein the units of the radius of curvature, the thickness / distance, and the focal length are all millimeters (mm).

[0109]

[0110] Table 3

[0111] Table 4 shows the high-order term coefficients of the aspherical surfaces in Example Two, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0112] Face No. A4 A6 A8 A10 A12 A14 A16 S1 1.2740E-03 -6.5015E-04 3.5722E-03 -7.9226E-03 1.1031E-02 -1.0032E-02 6.0305E-03 S2 -1.3442E-02 3.7019E-03 2.1496E-02 -5.8293E-02 8.8069E-02 -8.6825E-02 5.7150E-02 S3 -1.2168E-02 1.2210E-02 1.8611E-02 -6.3761E-02 1.0464E-01 -1.0986E-01 7.6712E-02 S4 2.0618E-03 1.4737E-02 -1.7952E-02 5.1821E-02 -1.1508E-01 1.6391E-01 -1.5016E-01 S5 -2.5830E-02 -9.9956E-04 1.0502E-02 -1.8806E-02 1.5436E-02 -1.3271E-03 -1.0137E-02 S6 -3.3256E-02 9.3740E-03 -7.7869E-03 9.5357E-03 -9.0449E-03 5.6853E-03 -1.9393E-03 S7 -2.8078E-02 1.5371E-02 -3.0239E-02 4.5695E-02 -4.6595E-02 3.2009E-02 -1.4775E-02 S8 -2.0456E-02 1.8039E-03 2.8203E-03 -8.9338E-03 1.0552E-02 -7.3363E-03 3.2369E-03 S9 -4.0192E-02 4.5359E-03 4.4280E-03 -5.3059E-03 2.5848E-03 -6.9304E-04 8.8857E-05 S10 -5.9289E-02 8.2323E-03 6.0472E-03 -8.4243E-03 5.4548E-03 -2.2994E-03 6.7078E-04 S11 -1.9963E-02 3.8337E-04 1.0503E-03 -7.0322E-04 2.2856E-04 -5.0534E-05 8.0999E-06 S12 4.5534E-03 -3.8434E-03 2.7967E-03 -1.3921E-03 4.3437E-04 -9.3228E-05 1.4375E-05 S13 -7.0596E-02 2.4825E-02 -5.2519E-03 6.1559E-04 7.5193E-06 -1.5428E-05 2.7180E-06 S14 -7.6535E-02 2.8628E-02 -8.3627E-03 1.8003E-03 -2.8268E-04 3.2368E-05 -2.7100E-06 Face No. A18 A20 A22 A24 A26 A28 A30 S1 -2.3742E-03 5.8708E-04 -8.2519E-05 5.0081E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.4863E-02 6.8563E-03 -1.0845E-03 7.4844E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 -3.5329E-02 1.0302E-02 -1.7220E-03 1.2557E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 8.8600E-02 -3.2579E-02 6.8018E-03 -6.1662E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.0620E-02 -5.2256E-03 1.3255E-03 -1.3981E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.1690E-04 1.7002E-04 -6.0250E-05 6.5248E-06 0.0000E+00 0.0000E+00 0.0000E+00 S7 4.5004E-03 -8.6289E-04 9.4046E-05 -4.4377E-06 0.0000E+00 0.0000E+00 0.0000E+00 S8 -9.1317E-04 1.5866E-04 -1.5298E-05 6.1860E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.4537E-06 -3.0165E-06 4.0925E-07 -1.9137E-08 0.0000E+00 0.0000E+00 0.0000E+00 S10 -1.3640E-04 1.9176E-05 -1.8241E-06 1.1206E-07 -4.0142E-09 6.3743E-11 0.0000E+00 S11 -9.2139E-07 7.2485E-08 -3.8479E-09 1.3249E-10 -2.7313E-12 2.7999E-14 -7.5374E-17 S12 -1.6070E-06 1.2948E-07 -7.4053E-09 2.9231E-10 -7.5573E-12 1.1505E-13 -7.8145E-16 S13 -2.6795E-07 1.7284E-08 -7.5936E-10 2.2647E-11 -4.4036E-13 5.0482E-15 -2.5924E-17 S14 1.6594E-07 -7.3889E-09 2.3559E-10 -5.2177E-12 7.5843E-14 -6.4635E-16 2.4255E-18

[0113] Table 4

[0114] Figure 7 The axial chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Figure 8 The astigmatism curve of the optical imaging lens of Example Two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 9 The distortion curve of the optical imaging lens of Example Two is shown, which represents the distortion size values corresponding to different field angles. Figure 10 The magnification chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the deviation of the image height on the imaging surface after the light rays pass through the optical imaging lens.

[0115] According to Figures 7 to 10 It can be seen that the optical imaging lens given in Example Two can achieve good imaging quality.

[0116] Example Three

[0117] As Figures 11 to 15 shown, the optical imaging lens of Example Three of the present application is described. Figure 11 The structural schematic diagram of the optical imaging lens of Example Three is shown.

[0118] As Figure 11 shown, the optical imaging lens sequentially comprises a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17 from the object side to the image side.

[0119] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a concave surface. The sixth lens E6 has positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens E7 has negative refractive power, the object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from an object sequentially passes through the surfaces S1 to S16 and is finally imaged on an imaging surface S17.

[0120] In this example, the image height ImgH of the optical imaging lens is 6.10 mm. The total track length TTL of the optical imaging lens is 7.70 mm.

[0121] Table 5 shows the basic structure parameter table of the optical imaging lens of Example Three, wherein the units of the radius of curvature, the thickness / distance, and the focal length are millimeters (mm).

[0122]

[0123] Table 5

[0124] Table 6 shows the high-order term coefficients of the aspherical surfaces that can be used in the optical imaging lens of Example Three, wherein each aspherical surface can be defined by the formula (1) given in Example One above.

[0125] Face No. A4 A6 A8 A10 A12 A14 A16 S1 7.5726E-04 2.9660E-03 -8.4548E-03 1.5678E-02 -1.8394E-02 1.4169E-02 -7.2662E-03 S2 -9.7852E-03 1.0589E-03 2.4753E-02 -6.6600E-02 1.0374E-01 -1.0482E-01 6.9943E-02 S3 -9.9003E-03 6.6304E-03 3.0433E-02 -8.8851E-02 1.4396E-01 -1.5117E-01 1.0530E-01 S4 1.9095E-03 9.4644E-03 -1.6054E-04 2.6956E-03 -1.8392E-02 3.5969E-02 -3.7496E-02 S5 -2.4541E-02 -1.8329E-03 -2.8962E-03 3.8651E-02 -1.0738E-01 1.6017E-01 -1.4807E-01 S6 -3.1678E-02 4.1601E-03 1.1804E-03 -3.8016E-03 7.8052E-03 -1.0447E-02 9.0346E-03 S7 -2.7088E-02 1.3582E-02 -3.2231E-02 5.3847E-02 -5.7312E-02 4.0013E-02 -1.8464E-02 S8 -1.9572E-02 -4.0190E-04 6.8491E-03 -1.5104E-02 1.6852E-02 -1.1499E-02 5.0311E-03 S9 -4.0415E-02 3.7824E-03 7.7012E-03 -9.5876E-03 5.4868E-03 -1.8684E-03 3.8444E-04 S10 -6.0964E-02 1.0044E-02 5.1702E-03 -7.9898E-03 5.0070E-03 -1.9660E-03 5.2640E-04 S11 -1.9320E-02 8.7773E-04 7.6894E-04 -5.4114E-04 1.3200E-04 -8.8922E-06 -3.4009E-06 S12 8.9608E-03 -5.1817E-03 3.0050E-03 -1.3872E-03 4.2774E-04 -9.1875E-05 1.4116E-05 S13 -5.8820E-02 1.6908E-02 -2.9246E-03 2.7912E-04 1.7545E-05 -1.0313E-05 1.6582E-06 S14 -5.7164E-02 1.6803E-02 -3.9713E-03 7.0206E-04 -8.9706E-05 8.0535E-06 -4.8862E-07 Face No. A18 A20 A22 A24 A26 A28 A30 S1 2.4544E-03 -5.2483E-04 6.4493E-05 -3.4893E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -3.0529E-02 8.3728E-03 -1.3081E-03 8.8712E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 -4.8140E-02 1.3864E-02 -2.2787E-03 1.6282E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 2.3607E-02 -9.0246E-03 1.9418E-03 -1.8156E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 8.7629E-02 -3.2422E-02 6.8461E-03 -6.3079E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -4.9138E-03 1.6246E-03 -2.9770E-04 2.3141E-05 0.0000E+00 0.0000E+00 0.0000E+00 S7 5.5579E-03 -1.0458E-03 1.1152E-04 -5.1463E-06 0.0000E+00 0.0000E+00 0.0000E+00 S8 -1.4117E-03 2.4418E-04 -2.3489E-05 9.5170E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 -4.2162E-05 1.0440E-06 2.3151E-07 -1.6831E-08 0.0000E+00 0.0000E+00 0.0000E+00 S10 -9.8016E-05 1.2700E-05 -1.1314E-06 6.6960E-08 -2.4084E-09 4.0421E-11 0.0000E+00 S11 1.1367E-06 -1.7249E-07 1.5772E-08 -9.1384E-10 3.2921E-11 -6.7458E-13 6.0178E-15 S12 -1.5606E-06 1.2362E-07 -6.9260E-09 2.6730E-10 -6.7520E-12 1.0042E-13 -6.6641E-16 S13 -1.5640E-07 9.7515E-09 -4.1519E-10 1.2002E-11 -2.2605E-13 2.5071E-15 -1.2438E-17 S14 1.8185E-08 -2.5933E-10 -1.0541E-11 6.8945E-13 -1.7495E-14 2.2400E-16 -1.1910E-18

[0126] Table 6

[0127] Figure 12 The axial chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the optical imaging lens. Figure 13 The astigmatism curve of the optical imaging lens of Example Three is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 14 The distortion curve of the optical imaging lens of Example Three is shown, which represents the distortion size values corresponding to different field angles. Figure 15 The rate of change of the focal length curve of the optical imaging lens of Example Three is shown, which represents the deviation of the light rays on the imaging surface after passing through the optical imaging lens.

[0128] According toFigures 12 to 15 It can be known that the optical imaging lens provided in Example Three can achieve good imaging quality.

[0129] Example Four

[0130] As shown in Figures 16 to 20 , the optical imaging lens of Example Four of the present application is described. Figure 16 The structural schematic diagram of the optical imaging lens of Example Four is shown.

[0131] As shown in Figure 16 , the optical imaging lens sequentially comprises a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17 from the object side to the image side.

[0132] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a convex surface. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a concave surface. The sixth lens E6 has positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a concave surface. The seventh lens E7 has negative refractive power, the object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.

[0133] In the present example, the image height ImgH of the optical imaging lens is 6.55 mm. The total length TTL of the optical imaging lens is 7.84 mm.

[0134] Table 7 shows the basic structural parameter table of the optical imaging lens of Example Four, wherein the units of the curvature radius, the thickness / distance, and the focal length are all millimeters (mm).

[0135]

[0136] Table 7

[0137] Table 8 shows the high-order term coefficients of the aspherical surfaces that can be used in Example Four, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0138] Face No. A4 A6 A8 A10 A12 A14 A16 S1 6.3252E-05 4.8590E-03 -1.3509E-02 2.4635E-02 -2.8990E-02 2.2562E-02 -1.1711E-02 S2 -1.1614E-02 4.8125E-03 6.1788E-03 -2.0910E-02 3.6455E-02 -4.0957E-02 3.0001E-02 S3 -1.1120E-02 6.6783E-03 3.3661E-02 -1.0317E-01 1.7663E-01 -1.9385E-01 1.3963E-01 S4 8.8269E-04 1.7740E-02 -3.4354E-02 9.5038E-02 -1.7658E-01 2.1411E-01 -1.7148E-01 S5 -2.3602E-02 -1.2896E-02 3.4016E-02 -2.3715E-02 -5.3804E-02 1.5271E-01 -1.7948E-01 S6 -3.2552E-02 7.4729E-03 -1.7096E-02 5.0967E-02 -8.3451E-02 8.4163E-02 -5.4849E-02 S7 -2.6151E-02 7.1922E-03 -1.8444E-02 3.5376E-02 -4.0237E-02 2.9310E-02 -1.4078E-02 S8 -1.8879E-02 -2.2510E-04 2.9247E-03 -7.1402E-03 8.4658E-03 -6.0240E-03 2.7129E-03 S9 -3.9941E-02 5.5153E-03 3.9359E-03 -5.7164E-03 3.3183E-03 -1.1920E-03 2.8553E-04 S10 -6.1428E-02 1.1028E-02 3.7323E-03 -7.0096E-03 4.7876E-03 -2.0624E-03 6.0900E-04 S11 -1.9584E-02 -3.0327E-04 1.6190E-03 -1.0225E-03 3.4537E-04 -8.0531E-05 1.3747E-05 S12 6.1358E-03 -4.2768E-03 2.8214E-03 -1.3696E-03 4.2297E-04 -9.0301E-05 1.3926E-05 S13 -7.3769E-02 2.8759E-02 -7.5786E-03 1.4180E-03 -1.7023E-04 1.1471E-05 -1.6851E-07 S14 -8.0476E-02 3.1574E-02 -9.6125E-03 2.1534E-03 -3.5384E-04 4.2781E-05 -3.8195E-06 Face No. A18 A20 A22 A24 A26 A28 A30 S1 4.0032E-03 -8.6497E-04 1.0714E-04 -5.8149E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.4187E-02 4.1705E-03 -6.9264E-04 4.9608E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 -6.5530E-02 1.9284E-02 -3.2298E-03 2.3479E-04 0.0000E+00 0.0000E+00 0.0000E+00 S4 9.0347E-02 -3.0199E-02 5.8264E-03 -4.9613E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.2070E-01 -4.8108E-02 1.0604E-02 -9.9894E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.3191E-02 -6.1346E-03 9.2213E-04 -6.0154E-05 0.0000E+00 0.0000E+00 0.0000E+00 S7 4.4236E-03 -8.7028E-04 9.6932E-05 -4.6589E-06 0.0000E+00 0.0000E+00 0.0000E+00 S8 -7.7981E-04 1.3812E-04 -1.3594E-05 5.6203E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 -4.4795E-05 4.2416E-06 -2.0237E-07 2.9090E-09 0.0000E+00 0.0000E+00 0.0000E+00 S10 -1.2466E-04 1.7554E-05 -1.6640E-06 1.0130E-07 -3.5750E-09 5.5563E-11 0.0000E+00 S11 -1.7040E-06 1.5128E-07 -9.4933E-09 4.1153E-10 -1.1752E-11 1.9941E-13 -1.5264E-15 S12 -1.5653E-06 1.2730E-07 -7.3667E-09 2.9459E-10 -7.7207E-12 1.1917E-13 -8.2069E-16 S13 -4.3962E-08 4.6480E-09 -2.4564E-10 7.9774E-12 -1.6119E-13 1.8701E-15 -9.5591E-18 S14 2.5185E-07 -1.2194E-08 4.2709E-10 -1.0507E-11 1.7196E-13 -1.6788E-15 7.3891E-18

[0139] Table 8

[0140] Figure 17 The on-axis chromatic aberration curve of the optical imaging lens in Example 4 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 18 The astigmatism curves of the optical imaging lens in Example 4 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 19 The distortion curve of the optical imaging lens in Example 4 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 20 The magnification chromatic aberration curve of the optical imaging lens in Example 4 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical imaging lens.

[0141] according to Figures 17 to 20 As can be seen, the optical imaging lens given in Example 4 can achieve good imaging quality.

[0142] In summary, Examples 1 to 4 satisfy the relationships shown in Table 9.

[0143]

[0144]

[0145] Table 9

[0146] Table 10 shows the effective focal lengths f1 to f7 of each lens in the optical imaging lenses of Examples 1 to 4.

[0147] Example Parameters 1 2 3 4 f1 (mm) 5.90 5.75 5.53 6.12 f2 (mm) -17.20 -14.74 -13.36 -18.54 f3 (mm) -40.11 -44.62 -50.47 -44.52 f4 (mm) 29.90 29.70 29.13 30.45 f5 (mm) -43.76 -38.73 -35.79 -40.90 f6 (mm) 7.53 7.67 7.04 7.54 f7 (mm) -4.46 -4.58 -4.67 -4.52 f (mm) 6.89 6.97 6.53 6.90 TTL (mm) 7.83 7.95 7.70 7.84 ImgH (mm) 6.55 6.55 6.10 6.55

[0148] Table 10

[0149] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0150] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0151] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0152] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0153] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens has seven lenses with refractive power, comprising: a first lens with positive refractive power, an object side surface of the first lens being convex, and an image side surface of the first lens being concave; a second lens with negative refractive power, an object side surface of the second lens being convex, and an image side surface of the second lens being concave; a third lens with negative refractive power, an object side surface of the third lens being concave; a fourth lens with positive refractive power, an object side surface of the fourth lens being convex; a fifth lens with negative refractive power, an object side surface of the fifth lens being convex, and an image side surface of the fifth lens being concave; a sixth lens with positive refractive power, an object side surface of the sixth lens being convex; a seventh lens with negative refractive power, an object side surface of the seventh lens being concave, and an image side surface of the seventh lens being concave; an on-axis distance TTL from the object side surface of the first lens to an imaging surface of the optical imaging lens and a half diagonal length ImgH of an effective pixel area on the imaging surface satisfy: 1.19 ≤ TTL / ImgH ≤ 1.26; a radius of curvature R13 of the object side surface of the seventh lens and a radius of curvature R14 of the image side surface of the seventh lens satisfy: 3.01 ≤ (R13-R14) / (R13+R14) ≤ 3.28; an effective focal length f5 of the fifth lens, an effective focal length f2 of the second lens, and an effective focal length f3 of the third lens satisfy: 0.56 ≤ f5 / (f2+f3) ≤ 0.

76. 2.The optical imaging lens according to claim 1, wherein, an effective focal length f of the optical imaging lens and a maximum field of view angle FOV of the optical imaging lens satisfy: 5.79 mm ≤ f*tan(FOV / 2) ≤ 6.48 mm. 3.The optical imaging lens according to claim 1, wherein, a combined focal length f12 of the first lens and the second lens, a central thickness CT1 of the first lens, and a central thickness CT2 of the second lens satisfy: 6.71 ≤ f12 / (CT1+CT2) ≤ 6.

99. 4.The optical imaging lens according to claim 1, wherein, an effective focal length f6 of the sixth lens and an effective focal length f1 of the first lens satisfy: 1.23 ≤ f6 / f1 ≤ 1.

33.

5. The optical imaging lens according to claim 1, characterized in that, a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 1.53 ≤ (R2+R1) / (R2-R1) ≤ 1.

83. 6.The optical imaging lens according to claim 1, wherein, a radius of curvature R3 of the object side surface of the second lens and a radius of curvature R4 of the image side surface of the second lens satisfy: 2.36 ≤ (R3+R4) / (R3-R4) ≤ 3.

55. 7.The optical imaging lens according to claim 1, wherein, an effective focal length f of the optical imaging lens, a radius of curvature R9 of the object side surface of the fifth lens, and a radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.2 ≤ (R9+R10) / f ≤ 2.

47. 8.The optical imaging lens according to claim 1, wherein, An on-axis distance SAG51 between an intersection of an object side surface of the fifth lens and an optical axis of the optical imaging lens to an effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 between an intersection of an image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, and an on-axis distance SAG42 between an intersection of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfy: 3.87≤(SAG51+SAG52) / SAG42≤4.

32. 9.The optical imaging lens according to claim 1, wherein, An air gap T45 of the fourth lens and the fifth lens on the optical axis of the optical imaging lens, an air gap T56 of the fifth lens and the sixth lens on the optical axis, and an air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: 1.12≤(T45+T56) / T67≤1.

21. 10.The optical imaging lens according to claim 1, wherein, An edge thickness ET4 of the fourth lens, an edge thickness ET5 of the fifth lens, an edge thickness ET6 of the sixth lens, and an edge thickness ET7 of the seventh lens satisfy: 1.19≤(ET6+ET7) / (ET4+ET5)≤1.61.

Images