Optical imaging lens

Abstract

The application provides an optical imaging lens. The optical imaging lens comprises, in sequence from the object side to the image side, a first lens, the first lens having positive refractive power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens, the second lens having negative refractive power; a third lens, the third lens having positive refractive power; a fourth lens, the fourth lens having negative refractive power; a fifth lens, the fifth lens having positive refractive power; a sixth lens, the sixth lens having negative refractive power; a seventh lens, the seventh lens having positive refractive power, the object side surface of the seventh lens being convex, and the image side surface of the seventh lens being concave; and an eighth lens, the eighth lens having negative refractive power, the object side surface of the eighth lens being convex; wherein the Abbe number V1 of the first lens satisfies 60 < V1 < 90; and the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy 7.0 mm < f*tan(FOV / 2) < 9.0 mm. The application solves the problem of poor imaging quality of the optical imaging lens in the prior art.

Description

[0001] This application is a divisional application of the invention patent application with the application number 202111249318.X and the application date October 26, 2021, and the invention name Optical imaging lens. TECHNICAL FIELD

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

[0003] With the popularization of mobile phone cameras, the functions of mobile phone cameras are becoming more and more diverse, and the design requirements of lens by major terminal manufacturers are becoming higher and higher. At present, three or four lenses are generally mounted on the terminal product, one of which is a main camera lens, and the manufacturers are increasingly demanding the imaging quality of the main camera lens.

[0004] That is, the optical imaging lens in the prior art has the problem of poor imaging quality. SUMMARY

[0005] The main purpose of the present application is to provide an optical imaging lens to solve the problem of poor imaging quality of the optical imaging lens in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical imaging lens is provided, which sequentially includes, from the object side of the optical imaging lens to the image side of the optical imaging lens: a first lens, the first lens has a positive refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens, the second lens has a negative refractive power; a third lens, the third lens has a positive refractive power; a fourth lens, the fourth lens has a negative refractive power; a fifth lens, the fifth lens has a positive refractive power; a sixth lens, the sixth lens has a negative refractive power; a seventh lens, the seventh lens has a positive refractive power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and an eighth lens, the eighth lens has a negative refractive power, and the object side surface of the eighth lens is a convex surface; wherein the Abbe number V1 of the first lens satisfies: 60 < V1 < 90; and the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 7.0 mm < f*tan(FOV / 2) < 9.0 mm.

[0007] Further, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.1 < N2+N3 < 3.7.

[0008] Further, the effective focal length f1 of the first lens, 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: 0.8 < (R1+R2) / f1 < 1.5.

[0009] Further, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens, and the effective focal length f6 of the sixth lens satisfy: 0.6 < (f2 + f4) / f6 < 1.6.

[0010] Further, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens, and the effective focal length f7 of the seventh lens satisfy: 0.3 < f3 / (f5 + f7) < 1.6.

[0011] Further, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: 4.5 < (R3 + R4) / (R3 - R4) < 7.5.

[0012] Further, the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: 1.1 < R6 / R5 < 1.6.

[0013] Further, the effective focal length f8 of the eighth lens, the radius of curvature R15 of the object side surface of the eighth lens, and the radius of curvature R16 of the image side surface of the eighth lens satisfy: 0.8 < (R16 - R15) / f8 < 5.6.

[0014] Further, the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0 < f12 / (CT1 + CT2) < 16.0.

[0015] Further, the combined focal length f67 of the sixth lens and the seventh lens, the air separation T34 of the third lens and the fourth lens on the optical axis, and the air separation T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.0 < f67 / (T34 + T78) < 5.3.

[0016] Further, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy: 0.8 < (ET4 + ET5) / ET6 < 1.5.

[0017] Further, the on-axis distance SAG82 between the intersection of the image side surface of the eighth lens and the optical axis and the vertex of the effective radius of the image side surface of the eighth lens, the on-axis distance SAG81 between the intersection of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens, the on-axis distance SAG72 between the intersection of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, and the on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens satisfy: 1.2 < (SAG81 + SAG82) / (SAG71 + SAG72) < 1.9.

[0018] According to another aspect of the present application, there is provided an optical imaging lens comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens: 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; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power; a sixth lens having negative refractive power; a seventh lens having positive refractive power, an object side surface of the seventh lens being convex, an image side surface of the seventh lens being concave; an eighth lens having negative refractive power, an object side surface of the eighth lens being convex; wherein an Abbe number V1 of the first lens satisfies: 60 < V1 < 90; a composite focal length f12 of the first lens and the second lens, a central thickness CT1 of the first lens on an optical axis, and a central thickness CT2 of the second lens on the optical axis satisfy: 9.0 < f12 / (CT1 + CT2) < 16.0.

[0019] Further, a refractive index N2 of the second lens and a refractive index N3 of the third lens satisfy: 3.1 < N2 + N3 < 3.7.

[0020] Further, an effective focal length f1 of the first lens, 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: 0.8 < (R1 + R2) / f1 < 1.5.

[0021] Further, an effective focal length f4 of the fourth lens, an effective focal length f2 of the second lens, and an effective focal length f6 of the sixth lens satisfy: 0.6 < (f2 + f4) / f6 < 1.6.

[0022] Further, an effective focal length f3 of the third lens, an effective focal length f5 of the fifth lens, and an effective focal length f7 of the seventh lens satisfy: 0.3 < f3 / (f5 + f7) < 1.6.

[0023] 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: 4.5 < (R3 + R4) / (R3 - R4) < 7.5.

[0024] Further, a curvature radius R5 of the object side surface of the third lens and a curvature radius R6 of the image side surface of the third lens satisfy: 1.1 < R6 / R5 < 1.6.

[0025] Further, an effective focal length f8 of the eighth lens, a curvature radius R15 of the object side surface of the eighth lens, and a curvature radius R16 of the image side surface of the eighth lens satisfy: 0.8 < (R16 - R15) / f8 < 5.6.

[0026] Further, a synthetic focal length f67 of the sixth lens and the seventh lens, an air separation T34 on the optical axis of the third lens and the fourth lens, an air separation T78 on the optical axis of the seventh lens and the eighth lens satisfy: 4.0 < f67 / (T34+T78) < 5.3.

[0027] Further, an edge thickness ET4 of the fourth lens, an edge thickness ET5 of the fifth lens and an edge thickness ET6 of the sixth lens satisfy: 0.8 < (ET4+ET5) / ET6 < 1.5.

[0028] Further, an on-axis distance SAG82 between the intersection of the image side surface of the eighth lens and the optical axis and the vertex of the effective radius of the image side surface of the eighth lens, an on-axis distance SAG81 between the intersection of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens, an on-axis distance SAG72 between the intersection of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, and an on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens satisfy: 1.2 < (SAG81+SAG82) / (SAG71+SAG72) < 1.9.

[0029] The technical scheme of the present application is applied, sequentially including the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens from the object side of the optical imaging lens to the image side of the optical imaging 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 third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; the eighth lens has negative refractive power, and the object side surface of the eighth lens is convex; wherein the Abbe number V1 of the first lens satisfies: 60 < V1 < 90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 7.0 mm < f*tan(FOV / 2) < 9.0 mm.

[0030] By reasonably controlling the positive and negative distribution of the optical power of each lens of the optical imaging lens, the low-order aberration 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 the Abbe number of the first lens within a reasonable range, the dispersion degree of the optical imaging lens can be reasonably controlled, the color difference correction ability of the optical imaging lens is improved, and the optical imaging lens can achieve a better imaging effect. By controlling the Abbe number of the first lens, the dispersion degree of the system is reasonably controlled, the color difference correction ability is improved, and a better imaging effect is achieved; by limiting the maximum half field angle and the effective focal length of the optical imaging lens, the optical imaging lens has the characteristics of a large image surface. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein for explanation by referring to the embodiments of the present application. In the drawings:

[0032] Figure 1 A structure schematic view of the optical imaging lens of example one of the present application is shown;

[0033] 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 the example one are shown respectively; Figure 1

[0034] Figure 6 A structure schematic view of the optical imaging lens of example two of the present application is shown;

[0035] 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 the example two are shown respectively; Figure 6

[0036] Figure 11 A structure schematic view of the optical imaging lens of example three of the present application is shown;

[0037] Figures 12 to 15 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens in the example three are shown respectively; Figure 11

[0038] Figure 16 A structure schematic view of the optical imaging lens of example four of the present application is shown;

[0039] Figures 17 to 20 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens in the example four are shown respectively; Figure 16 ​​​​

[0040] Figure 21 Fig. 5 shows a structure diagram of an optical imaging lens according to Example Five of the present application;

[0041] Figures 22 to 25 Fig. 6 shows the on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the lateral chromatic aberration curve of the optical imaging lens in Fig. 5, respectively. Figure 21

[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;

[0044] 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, eighth lens; S15, object side surface of the eighth lens; S16, image side surface of the eighth lens; E9, filter; S17, object side surface of the filter; S18, image side surface of the filter; S19, imaging surface. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments and the features in the embodiments in 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.

[0046] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the present application belongs.

[0047] In the present application, unless otherwise specified, the orientation words such as “up, down, 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, outer” refers to the inner and outer relative to the contour of the components themselves, but the above-mentioned orientation words are not used to limit the present application.

[0048] ​It should be noted that the terms first, second, third, etc. in the present specification are only used 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 surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface 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. Each lens surface near the object side becomes the object side surface of the lens, and each lens surface near the image side is referred to as the image side surface of the lens. 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) positive or negative to judge the convexity or 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] With the development of mobile phone camera field, the competition of mobile phone lens is getting bigger and bigger, and the design requirements of major terminal manufacturers for the lens are getting higher and higher. Especially on the main camera of high-end flagship models, it is required to better optimize the adverse effects caused by environmental temperature and improve the system signal-to-noise ratio while meeting the characteristics of large wide angle, large aperture, large image surface and high imaging quality. Compared with resin materials, glass materials have a wider refractive index range and superior optical performance; and its thermal expansion coefficient is small, and the back focus and focal length of the optical system change less with temperature. The present application aims to provide an eight-piece plastic-glass hybrid optical imaging lens with large image surface, large wide angle, large aperture and high imaging quality, which can better meet the application requirements of the main camera on the next generation of high-end smart phones.

[0052] In order to solve the problem of poor imaging quality of the optical imaging lens in the prior art, the present application provides an optical imaging lens.

[0053] Embodiment one

[0054] As Figures 1 to 25As shown, the optical imaging lens sequentially comprises, from the object side of the optical imaging lens to the image side of the optical imaging lens, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth 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 third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; the eighth lens has negative refractive power, and the object side surface of the eighth lens is convex; wherein the Abbe number V1 of the first lens satisfies: 60 < V1 < 90; and the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 7.0 mm < f*tan(FOV / 2) < 9.0 mm.

[0055] By reasonably controlling the positive and negative distribution of the refractive power of each lens of the optical imaging lens, the low-order aberration of the optical imaging lens can be effectively balanced, and the sensitivity of the tolerance of the optical imaging lens can be reduced, so that the miniaturization of the optical imaging lens is maintained while the imaging quality of the optical imaging lens is ensured. By controlling the Abbe number of the first lens within a reasonable range, the dispersion degree of the optical imaging lens can be reasonably controlled, the color difference correction capability of the optical imaging lens can be improved, and the optical imaging lens can achieve better imaging effect. By controlling the Abbe number of the first lens, the dispersion degree of the system is reasonably controlled, the color difference correction capability is improved, and better imaging effect is achieved; by limiting the maximum half field angle and the effective focal length of the optical imaging lens, the optical imaging lens has the characteristics of a large image surface.

[0056] Preferably, the Abbe number V1 of the first lens satisfies: 60 < V1 < 90; and the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy: 7.1 mm < f*tan(FOV / 2) < 8.0 mm. The Abbe number V1 of the first lens satisfies: 62 < V1 < 85.

[0057] In the embodiment, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.1 < N2+N3 < 3.7. By limiting the refractive indices of the second lens and the third lens, the deflection of light can be reasonably controlled, the optical performance of the optical imaging lens can be effectively improved, and the imaging quality of the optical imaging lens can be ensured. Preferably, 3.13 < N2+N3 < 3.6.

[0058] In the embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy: 0.8<(R1+R2) / f1<1.5. By controlling (R1+R2) / f1 in a reasonable range, the optical imaging lens can realize the deflection of the light path, balance the high-order spherical aberration generated by the optical imaging lens, and ensure the imaging quality of the optical imaging lens. Preferably, 0.85<(R1+R2) / f1<1.4.

[0059] In the embodiment, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens satisfy: 0.6<(f2+f4) / f6<1.6. By restricting the effective focal lengths of the second lens, the fourth lens and the sixth lens, the optical power is reasonably distributed, thereby obtaining good imaging quality and realizing high resolving power. Preferably, 0.8<(f2+f4) / f6<1.5.

[0060] In the embodiment, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 0.3<f3 / (f5+f7)<1.6. By restricting the effective focal lengths of the fifth lens, the seventh lens and the third lens within a certain range, the optical power can be reasonably distributed, and good imaging quality can be obtained. Preferably, 0.4<f3 / (f5+f7)<1.5.

[0061] In the embodiment, the radius of curvature R3 of the object side of the second lens and the radius of curvature R4 of the image side of the second lens satisfy: 4.5<(R3+R4) / (R3-R4)<7.5. By reasonably controlling the radius of curvature of the object side of the second lens and the radius of curvature of the image side of the second lens within a certain range, the aberration generated by the optical imaging lens at the second lens can be effectively controlled, and the imaging quality of the optical imaging lens can be ensured. Preferably, 4.6<(R3+R4) / (R3-R4)<7.0.

[0062] In the embodiment, the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy: 1.1<R6 / R5<1.6. By controlling the radius of curvature of the object side of the third lens and the radius of curvature of the image side of the third lens within a certain range, the surface shape of the third lens can be reasonably controlled, and the sensitivity of the optical imaging lens can be effectively reduced. Preferably, 1.2<R6 / R5<1.5.

[0063] In the embodiment, the effective focal length f8 of the eighth lens, the radius of curvature R15 of the object side surface of the eighth lens, and the radius of curvature R16 of the image side surface of the eighth lens satisfy: 0.8 < (R16-R15) / f8 < 5.6. By controlling (R16-R15) / f8 within a reasonable range, the deflection angle of the marginal ray of the optical imaging lens can be reasonably controlled, the optical imaging lens has good processability, and the sensitivity of the optical imaging lens is reduced. Preferably, 0.9 < (R16-R15) / f8 < 5.5.

[0064] In the embodiment, the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0 < f12 / (CT1+CT2) < 16.0. By controlling the combined focal length of the first lens and the second lens and the central thickness of the first lens and the second lens, the processability can be reasonably ensured, the contribution rate of the spherical aberration of the first lens and the second lens is reduced, and the imaging quality of the optical imaging lens is ensured. Preferably, 9.1 < f12 / (CT1+CT2) < 15.8.

[0065] In the embodiment, the combined focal length f67 of the sixth lens and the seventh lens, the air separation T34 of the third lens and the fourth lens on the optical axis, and the air separation T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.0 < f67 / (T34+T78) < 5.3. By controlling f67 / (T34+T78) within a reasonable range, the processability of the sixth lens, the seventh lens, the third lens, and the fourth lens is met. Preferably, 4.1 < f67 / (T34+T78) < 5.2.

[0066] In the embodiment, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy: 0.8 < (ET4+ET5) / ET6 < 1.5. Reasonably restricting the edge thickness of the fourth lens, the fifth lens, and the sixth lens can avoid the edge of the lens being too thin and not easy to form, while softening the light deflection at the edge of the lens and avoiding strong ghost images. Preferably, 1.0 < (ET4+ET5) / ET6 < 1.4.

[0067] In this embodiment, the axial distance SAG82 between the intersection point of the image side surface of the eighth lens and the optical axis and the vertex of the effective radius of the image side surface of the eighth lens, the axial distance SAG81 between the intersection point of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens, the axial distance SAG72 between the intersection point of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, and the axial distance SAG71 between the intersection point of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens satisfy: 1.2 < (SAG81 + SAG82) / (SAG71 + SAG72) < 1.9. By controlling (SAG81 + SAG82) / (SAG71 + SAG72) within a reasonable range, it is possible to ensure that the shapes and processing of the last two lenses are at a better level, and at the same time balance the spherical aberration, coma, and astigmatism generated by the optical imaging lens. Preferably, 1.3 < (SAG81 + SAG82) / (SAG71 + SAG72) < 1.8.

[0068] Embodiment 2

[0069] As Figures 1 to 25 shown, sequentially from the object side to the image side of the optical imaging lens, it includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has a positive optical 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 a negative optical power; the third lens has a positive optical power; the fourth lens has a negative optical power; the fifth lens has a positive optical power; the sixth lens has a negative optical power; the seventh lens has a positive optical power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; the eighth lens has a negative optical power, and the object side surface of the eighth lens is convex; wherein, the Abbe number V1 of the first lens satisfies: 60 < V1 < 90; the combined focal length f12 of the first lens and the second lens, and the center thickness CT1 of the first lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy: 9.0 < f12 / (CT1 + CT2) < 16.0.

[0070] By reasonably controlling the positive and negative distribution of the refractive power of each lens of the optical imaging lens, the low-order aberration of the optical imaging lens can be effectively balanced, and the sensitivity of the tolerance of the optical imaging lens can be reduced, thereby maintaining the miniaturization of the optical imaging lens while ensuring the imaging quality of the optical imaging lens. By controlling the Abbe number of the first lens within a reasonable range, the dispersion degree of the optical imaging lens can be reasonably controlled, the color difference correction capability of the optical imaging lens can be improved, and the optical imaging lens can achieve a better imaging effect. By controlling the Abbe number of the first lens, the dispersion degree of the system is reasonably controlled, the color difference correction capability is improved, and a better imaging effect is achieved. By controlling the combined focal length of the first lens and the second lens and the central thickness of the first lens and the second lens, the machinability can be reasonably ensured, and the contribution rate of the spherical aberration of the first lens and the second lens can be reduced, thereby ensuring the imaging quality of the optical imaging lens.

[0071] Preferably, the Abbe number V1 of the first lens satisfies: 60 < V1 < 90. The combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.1 < f12 / (CT1 + CT2) < 15.8.

[0072] In this embodiment, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.1 < N2 + N3 < 3.7. By restricting the refractive indices of the second lens and the third lens, the deflection of light can be reasonably controlled, the optical performance of the optical imaging lens can be effectively improved, and the imaging quality of the optical imaging lens can be ensured. Preferably, 3.13 < N2 + N3 < 3.6.

[0073] In this embodiment, the effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, and the curvature radius R2 of the image side of the first lens satisfy: 0.8 < (R1 + R2) / f1 < 1.5. By controlling (R1 + R2) / f1 within a reasonable range, the deflection of the optical path of the optical imaging lens can be facilitated, the high-order spherical aberration generated by the optical imaging lens can be balanced, and the imaging quality of the optical imaging lens can be ensured. Preferably, 0.85 < (R1 + R2) / f1 < 1.4.

[0074] In this embodiment, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens, and the effective focal length f6 of the sixth lens satisfy: 0.6 < (f2 + f4) / f6 < 1.6. By restricting the effective focal lengths of the second lens, the fourth lens, and the sixth lens, the refractive power is reasonably distributed, thereby obtaining good imaging quality and achieving high resolving power. Preferably, 0.8 < (f2 + f4) / f6 < 1.5.

[0075] In the embodiment, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 0.3 < f3 / (f5+f7) < 1.6. By restricting the effective focal length of the fifth lens, the effective focal length of the seventh lens and the effective focal length of the third lens within a certain interval, the optical power can be reasonably distributed, and good imaging quality can be obtained. Preferably, 0.4 < f3 / (f5+f7) < 1.5.

[0076] 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: 4.5 < (R3+R4) / (R3-R4) < 7.5. By reasonably controlling the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens within a certain range, the aberration generated by the second lens of the optical imaging lens can be effectively controlled, and the imaging quality of the optical imaging lens is ensured. Preferably, 4.6 < (R3+R4) / (R3-R4) < 7.0.

[0077] In the embodiment, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 1.1 < R6 / R5 < 1.6. By controlling the curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens within a certain range, the surface shape of the third lens can be reasonably controlled, and the sensitivity of the optical imaging lens can be effectively reduced. Preferably, 1.2 < R6 / R5 < 1.5.

[0078] In the embodiment, the effective focal length f8 of the eighth lens, the curvature radius R15 of the object side surface of the eighth lens and the curvature radius R16 of the image side surface of the eighth lens satisfy: 0.8 < (R16-R15) / f8 < 5.6. By controlling (R16-R15) / f8 within a reasonable range, the deflection angle of the edge light of the optical imaging lens can be reasonably controlled, the optical imaging lens has good processability, and the sensitivity of the optical imaging lens is reduced. Preferably, 0.9 < (R16-R15) / f8 < 5.5.

[0079] In the embodiment, the combined focal length f67 of the sixth lens and the seventh lens, the air gap T34 of the third lens and the fourth lens on the optical axis, and the air gap T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.0 < f67 / (T34+T78) < 5.3. By controlling f67 / (T34+T78) within a reasonable range, the processing requirements of the sixth lens, the seventh lens, the third lens and the fourth lens are met. Preferably, 4.1 < f67 / (T34+T78) < 5.2.

[0080] In the embodiment, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens, and the edge thickness ET6 of the sixth lens satisfy: 0.8 < (ET4 + ET5) / ET6 < 1.5. Reasonably restricting the edge thicknesses of the fourth lens, the fifth lens, and the sixth lens can avoid that the edge of the lens is too thin and is not easy to be shaped, and at the same time, can alleviate the deflection of the light at the edge of the lens and avoid strong ghost images. Preferably, 1.0 < (ET4 + ET5) / ET6 < 1.4.

[0081] In the embodiment, the on-axis distance SAG82 between the intersection of the image side surface of the eighth lens and the optical axis and the vertex of the effective radius of the image side surface of the eighth lens, the on-axis distance SAG81 between the intersection of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens, the on-axis distance SAG72 between the intersection of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, and the on-axis distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens satisfy: 1.2 < (SAG81 + SAG82) / (SAG71 + SAG72) < 1.9. By controlling (SAG81 + SAG82) / (SAG71 + SAG72) within a reasonable range, the shape and processing of the last two lenses can be ensured at a better level, and the spherical aberration, coma, and astigmatism generated by the optical imaging lens can be balanced. Preferably, 1.3 < (SAG81 + SAG82) / (SAG71 + SAG72) < 1.8.

[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 element located on the imaging surface.

[0083] The optical imaging lens in the present application can adopt multiple lenses, for example, eight lenses as described above. By reasonably allocating the focal power, surface shape, central thickness of each lens, and on-axis distance between each lens, etc., the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the 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. The optical imaging lens described above also has the advantages of large aperture, large field of view, ultra-thin, and good imaging quality, which can meet the miniaturization requirements of smart electronic products.

[0084] In the present application, at least one of the mirror surfaces of the lenses is an aspheric mirror surface. The aspheric lens is characterized by a continuously changing curvature from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, the aspheric lens has a better curvature radius characteristic, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After the aspheric lens is used, the aberration occurring 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 the eight lenses are described as an example in the embodiments, the optical imaging lens is not limited to including eight 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 one to five is applicable to all embodiments of the present application.

[0088] Example one

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

[0090] As shown in FIG. 2, a schematic diagram of the structure of the optical imaging lens of example one is shown. Figure 1 As shown in FIG. 2, a schematic diagram of the structure of the optical imaging lens of example one is shown.

[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 positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has negative 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 positive refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object side S15 of the eighth lens is convex, and the image side S16 of the eighth lens is concave. The filter E9 has the object side S17 and the image side S18 of the filter. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0092] In the present example, the total effective focal length f of the optical imaging lens is 7.55 mm, the total track length TTL of the optical imaging lens is 9.49 mm, and the image height ImgH is 7.39 mm.

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

[0094]

[0095]

[0096] Table 1

[0097] In Example 1, the object side and the image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0098]

[0099] wherein x is the sag of the aspherical surface at a position along the optical axis at a height h 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 constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below provides the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S1-S16 in Example One.

[0100]

[0101]

[0102] Table 2

[0103] Figure 2 Figure 19 shows the on-axis chromatic aberration curve of the optical imaging lens according to Example One, which represents the deviation of convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Figure 3 Figure 20 shows the astigmatism curve of the optical imaging lens according to Example One, which represents the meridional image curvature and sagittal image curvature. Figure 4 Figure 21 shows the distortion curve of the optical imaging lens according to Example One, which represents the distortion values corresponding to different field angles. Figure 5 Figure 22 shows the lateral chromatic aberration curve of the optical imaging lens according to Example One, which represents the deviation of different image heights on the imaging plane after passing through the optical imaging lens.

[0104] According to Figures 2 to 5 It can be known that the optical imaging lens according to Example One can achieve good imaging quality.

[0105] Example Two

[0106] As Figures 6 to 10 shown, the optical imaging lens according to Example Two of the present application is described. In this example and the following examples, for the sake of brevity, some similar descriptions as in Example One will be omitted. Figure 6 Figure 23 shows a schematic view of the structure of the optical imaging lens according to Example Two.

[0107] As Figure 6 shown, the optical imaging lens sequentially includes, 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, an eighth lens E8, a filter E9, and an imaging plane S19.

[0108] 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 positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side S11 of the sixth lens is concave, and the image side S12 of the sixth lens is concave. The seventh lens E7 has positive refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object side S15 of the eighth lens is convex, and the image side S16 of the eighth lens is concave. The filter E9 has the object side S17 and the image side S18 of the filter. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0109] In this example, the total effective focal length f of the optical imaging lens is 7.57 mm, the total track length TTL of the optical imaging lens is 9.49 mm, and the image height ImgH is 7.39 mm.

[0110] 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, the focal length, and the effective radius are millimeters (mm).

[0111]

[0112]

[0113] Table 3

[0114] Table 4 shows the high-order term coefficients of the aspherical surfaces that can be used in Example Two, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0115]

[0116]

[0117] Table 4

[0118] Figure 7 The axial chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the convergence focus deviation 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 the 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 lateral chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the optical imaging lens.

[0119] According to Figures 7 to 10 It can be known that the optical imaging lens given in Example Two can achieve good imaging quality.

[0120] Example Three

[0121] As Figures 11 to 15 shown, the optical imaging lens of Example Three of the present application is described. Figure 11 A schematic diagram of the structure of the optical imaging lens of Example Three is shown.

[0122] As Figure 11 shown, the optical imaging lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0123] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has positive refractive power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object side surface S15 of the eighth lens is convex, and the image side surface S16 of the eighth lens is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface S19.

[0124] In this example, the total effective focal length f of the optical imaging lens is 7.55 mm, the total length TTL of the optical imaging lens is 9.50 mm, and the image height ImgH is 7.40 mm.

[0125] 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, the focal length and the effective radius are all millimeters (mm).

[0126]

[0127] Table 5

[0128] Table 6 shows the high order term coefficients of each aspherical surface that can be used in Example Three, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0129]

[0130]

[0131] Table 6

[0132] Figure 12 The on-axis chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the convergence focal point deviation 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 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 magnification chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the deviation of light rays on the imaging surface after passing through the optical imaging lens at different image heights.

[0133] According to Figures 12 to 15 It can be known that the optical imaging lens given in Example Three can achieve good imaging quality.

[0134] Example Four

[0135] As Figures 16 to 20 shown, the optical imaging lens of Example Four of the present application is described. Figure 16 The schematic diagram of the optical imaging lens structure of Example Four is shown.

[0136] As Figure 16 shown, the optical imaging lens sequentially comprises, 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, an eighth lens E8, a filter E9 and an imaging surface S19.

[0137] 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 positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has negative 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 positive refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object side S15 of the eighth lens is convex, and the image side S16 of the eighth lens is concave. The filter E9 has the object side S17 and the image side S18 of the filter. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

[0138] In the present example, the total effective focal length f of the optical imaging lens is 7.55 mm, the total track length TTL of the optical imaging lens is 9.50 mm, and the image height ImgH is 7.39 mm.

[0139] Table 7 shows the basic structure parameter table of the optical imaging lens of Example Four, wherein the units of the radius of curvature, the thickness / distance, the focal length and the effective radius are millimeter (mm).

[0140]

[0141] Table 7

[0142] Table 8 shows the high order term coefficients of the aspherical surface that can be used in the optical imaging lens of Example Four, wherein each aspherical surface can be defined by the formula (1) given in Example One above.

[0143]

[0144]

[0145] Table 8

[0146] Figure 17 The axial chromatic aberration curve of the optical imaging lens of Example Four is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 18 The astigmatism curve of the optical imaging lens of Example Four is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 19The distortion curve of the optical imaging lens of Example Four is shown, which represents the distortion size values corresponding to different field angles. Figure 20 The lateral chromatic aberration curve of the optical imaging lens of Example Four is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the optical imaging lens.

[0147] According to Figures 17 to 20 It can be known that the optical imaging lens of Example Four can achieve good imaging quality.

[0148] Example Five

[0149] As Figures 21 to 25 shown, the optical imaging lens of Example Five of the present application is described. Figure 21 A schematic diagram of the structure of the optical imaging lens of Example Five is shown.

[0150] As Figure 21 shown, the optical imaging lens sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an imaging surface S19.

[0151] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has positive refractive power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object side surface S15 of the eighth lens is convex, and the image side surface S16 of the eighth lens is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface S19.

[0152] In this example, the total effective focal length f of the optical imaging lens is 7.55 mm, the total length TTL of the optical imaging lens is 9.50 mm, and the image height ImgH is 7.40 mm.

[0153] Table 9 shows the basic structure parameters of the optical imaging lens of Example Five, wherein the units of the radius of curvature, thickness / distance, focal length and effective radius are millimeter (mm).

[0154]

[0155] Table 9

[0156] Table 10 shows the high order term coefficients of the aspherical surfaces in Example Five, wherein each aspherical surface can be defined by the formula (1) given in Example One.

[0157] Face No. A4 A6 A8 A10 A12 A14 A16 S1 -7.6353E-04 3.9972E-03 -9.6628E-03 1.4498E-02 -1.4396E-02 9.8345E-03 -4.7442E-03 S2 -5.0792E-03 -1.1876E-03 9.4016E-03 -2.0954E-02 2.7331E-02 -2.3740E-02 1.4463E-02 S3 -9.4244E-03 2.1573E-03 8.2820E-03 -2.4775E-02 3.7447E-02 -3.6507E-02 2.4636E-02 S4 -8.2405E-03 -9.0510E-04 1.7377E-02 -4.5094E-02 6.8602E-02 -6.9622E-02 4.9454E-02 S5 -1.1000E-02 1.9881E-04 1.2657E-03 -9.5935E-03 2.2376E-02 -3.0930E-02 2.8331E-02 S6 -5.5698E-03 -6.4536E-03 2.4763E-02 -6.5658E-02 1.1186E-01 -1.3034E-01 1.0733E-01 S7 -2.7412E-02 1.5930E-02 -4.3720E-02 8.0546E-02 -1.0516E-01 9.9086E-02 -6.8518E-02 S8 -1.9151E-02 2.8718E-02 -7.8239E-02 1.0588E-01 -9.3412E-02 5.8823E-02 -2.7332E-02 S9 7.7752E-03 1.4898E-02 -5.8470E-02 7.4126E-02 -5.6593E-02 3.0044E-02 -1.1675E-02 S10 5.9595E-03 -6.1062E-03 -1.4104E-03 4.0543E-03 -3.6005E-03 2.1621E-03 -9.4350E-04 S11 6.6498E-03 -9.5194E-03 9.0118E-03 -7.1051E-03 4.0588E-03 -1.6987E-03 5.2585E-04 S12 -3.2656E-02 2.6333E-04 7.0177E-03 -4.9545E-03 2.0651E-03 -6.0348E-04 1.2941E-04 S13 -1.0787E-02 -4.8370E-03 2.5542E-03 -1.1676E-03 3.7246E-04 -8.1355E-05 1.2404E-05 S14 2.9701E-02 -1.2434E-02 1.6524E-03 3.9183E-05 -5.9058E-05 1.2374E-05 -1.5213E-06 S15 -5.9738E-02 1.1533E-02 -1.8007E-03 3.1129E-04 -4.7417E-05 5.3446E-06 -4.3174E-07 S16 -6.7001E-02 1.6613E-02 -3.7089E-03 6.7188E-04 -9.1609E-05 9.1484E-06 -6.6585E-07 Face No. A18 A20 A22 A24 A26 A28 A30 S1 1.6388E-03 -4.0652E-04 7.1752E-05 -8.7867E-06 7.0913E-07 -3.3905E-08 7.2740E-10 S2 -6.3162E-03 1.9872E-03 -4.4637E-04 6.9761E-05 -7.2005E-06 4.4084E-07 -1.2113E-08 S3 -1.1818E-02 4.0584E-03 -9.8984E-04 1.6729E-04 -1.8610E-05 1.2248E-06 -3.6100E-08 S4 -2.5098E-02 9.1467E-03 -2.3734E-03 4.2758E-04 -5.0782E-05 3.5717E-06 -1.1256E-07 S5 -1.7900E-02 7.9283E-03 -2.4581E-03 5.2278E-04 -7.2681E-05 5.9512E-06 -2.1767E-07 S6 -6.3486E-02 2.7089E-02 -8.2673E-03 1.7603E-03 -2.4839E-04 2.0876E-05 -7.9106E-07 S7 3.4914E-02 -1.3032E-02 3.5072E-03 -6.6037E-04 8.2359E-05 -6.1009E-06 2.0295E-07 S8 9.4534E-03 -2.4221E-03 4.5235E-04 -5.9722E-05 5.2717E-06 -2.7870E-07 6.6637E-09 S9 3.3753E-03 -7.2471E-04 1.1383E-04 -1.2686E-05 9.4881E-07 -4.2654E-08 8.7029E-10 S10 3.0141E-04 -7.0080E-05 1.1677E-05 -1.3537E-06 1.0339E-07 -4.6653E-09 9.4000E-11 S11 -1.2060E-04 2.0354E-05 -2.4860E-06 2.1306E-07 -1.2119E-08 4.0990E-10 -6.2277E-12 S12 -2.0605E-05 2.4269E-06 -2.0787E-07 1.2532E-08 -5.0194E-10 1.1953E-11 -1.2776E-13 S13 -1.3431E-06 1.0419E-07 -5.7635E-09 2.2222E-10 -5.6755E-12 8.6259E-14 -5.9020E-16 S14 1.2682E-07 -7.4532E-09 3.0971E-10 -8.9098E-12 1.6881E-13 -1.8953E-15 9.5581E-18 S15 2.5123E-08 -1.0570E-09 3.1920E-11 -6.7527E-13 9.5075E-15 -8.0045E-17 3.0490E-19 S16 3.5316E-08 -1.3597E-09 3.7528E-11 -7.2267E-13 9.2131E-15 -6.9846E-17 2.3831E-19

[0158] Table 10

[0159] Figure 22 The axial chromatic aberration curve of the optical imaging lens of Example Five 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 23 The astigmatism curve of the optical imaging lens of Example Five is shown, which represents the meridional image curvature and sagittal image curvature. Figure 24 The distortion curve of the optical imaging lens of Example Five is shown, which represents the distortion size values corresponding to different field angles. Figure 25 The magnification chromatic aberration curve of the optical imaging lens of Example Five is shown, which represents the deviation of the image height on the imaging plane after the light rays pass through the optical imaging lens.

[0160] According to Figures 22 to 25 It can be seen that the optical imaging lens given in Example Five can achieve good imaging quality.

[0161] In summary, Examples One to Five respectively satisfy the relationships shown in Table 11.

[0162] Conditional / Embodiment 1 2 3 4 5 V1 64.05 81.61 68.30 67.70 65.70 f*tan(FOV / 2) (mm) 7.19 7.19 7.21 7.23 7.23 N2+N3 3.23 3.18 3.21 3.50 3.21 (R1+R2) / f1 1.35 1.17 1.29 1.07 1.28 (f2+f4) / f6 0.85 1.46 1.06 0.92 1.08 f3 / (f5+f7) 1.07 1.36 1.30 0.67 1.27 (R3+R4) / (R3-R4) 4.72 6.94 6.78 4.97 6.40 R6 / R5 1.31 1.28 1.23 1.31 1.25 (R16-R15) / f8 2.64 5.49 1.31 1.05 1.25 f12 / (CT1+CT2) 10.07 9.31 10.55 14.44 10.66 f67 / (T34+T78) 5.03 5.12 4.45 4.25 4.41 (ET4+ET5) / ET6 1.09 1.16 1.20 1.28 1.24 (SAG81+SAG82) / (SAG71+SAG72) 1.67 1.74 1.56 1.41 1.66

[0163] Table 11

[0164] Table 12 gives the effective focal length f of the optical imaging lens of Examples One to Five, and the effective focal lengths f1 to f8 of each lens.

[0165] Embodiment Parameters 1 2 3 4 5 f1 (mm) 9.39 10.06 9.76 11.11 9.72 f2 (mm) -23.63 -36.29 -34.11 -25.97 -32.73 f3 (mm) 33.15 39.45 42.74 21.04 40.69 f4 (mm) -23.98 -22.10 -23.62 -22.52 -22.27 f5 (mm) 21.60 20.16 24.71 23.63 24.21 f6 (mm) -56.19 -39.90 -54.27 -52.69 -51.06 f7 (mm) 9.31 8.86 8.11 8.01 7.94 f8 (mm) -6.68 -6.65 -6.71 -6.84 -6.75 f (mm) 7.55 7.57 7.55 7.55 7.55 TTL (mm) 9.49 9.49 9.50 9.50 9.50 ImgH (mm) 7.39 7.39 7.40 7.39 7.40

[0166] Table 12

[0167] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0168] Obviously, the above-described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application, without creative work, shall fall within the scope of the present application.

[0169] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0170] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0171] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not limited to those embodiments; instead, they will include, in general, any modifications of more or less than the specific details of the embodiments described above, which appropriately use the principles of the present application and which are apparent to those with skill in the art given the benefit of this disclosure. Therefore, the present application in its broader aspects is not limited to the specific details, representative apparatus and methods, and illustrative examples shown above. Accordingly, departures can be made from such details without departing from the spirit or scope of the application herein.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens is composed of only eight lenses with optical power, sequentially comprising from the object side of the optical imaging lens to the image side of the optical imaging lens: a first lens having positive optical power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens having negative optical power, the object side surface of the second lens being convex, and the image side surface of the second lens being concave; a third lens having positive optical power, the object side surface of the third lens being convex, and the image side surface of the third lens being concave; a fourth lens having negative optical power, the image side surface of the fourth lens being concave; a fifth lens having positive optical power, the image side surface of the fifth lens being convex; a sixth lens having negative optical power, the image side surface of the sixth lens being concave; a seventh lens having positive optical power, the object side surface of the seventh lens being convex, and the image side surface of the seventh lens being concave; an eighth lens having negative optical power, the object side surface of the eighth lens being convex, and the image side surface of the eighth lens being concave; wherein the Abbe number V1 of the first lens satisfies: 64.05≤V1≤81.61; the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.31≤f12 / (CT1+CT2)≤14.44; the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, and the radius of curvature R2 of the image side surface of the first lens satisfy: 1.07≤(R1+R2) / f1≤1.35; the effective focal length f8 of the eighth lens, the radius of curvature R15 of the object side surface of the eighth lens, and the radius of curvature R16 of the image side surface of the eighth lens satisfy: 1.05≤(R16-R15) / f8<5.

5. 2.The optical imaging lens according to claim 1, wherein, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.18≤N2+N3≤3.

5. 3.The optical imaging lens according to claim 1, wherein, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens, and the effective focal length f6 of the sixth lens satisfy: 0.85≤(f2+f4) / f6<1.

5. 4.The optical imaging lens according to claim 1, wherein, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens, and the effective focal length f7 of the seventh lens satisfy: 0.67≤f3 / (f5+f7)≤1.

36.

5. The optical imaging lens according to claim 1, characterized in that, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: 4.72≤(R3+R4) / (R3-R4)≤6.

94. 6.The optical imaging lens according to claim 1, wherein, the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: 1.2<R6 / R5≤1.

31. 7.The optical imaging lens according to claim 1, wherein, A synthetic focal length f67 of the sixth lens and the seventh lens, an air separation T34 of the third lens and the fourth lens on the optical axis, an air separation T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.25 ≤ f67 / (T34+T78) ≤ 5.

12. 8.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, and an edge thickness ET6 of the sixth lens satisfy: 1.09 ≤ (ET4+ET5) / ET6 ≤ 1.

28. 9.The optical imaging lens according to any one of claims 1 to 8, wherein, An on-axis distance SAG82 between an intersection of an image side surface of the eighth lens and the optical axis to a vertex of an effective radius of the image side surface of the eighth lens, an on-axis distance SAG81 between an intersection of an object side surface of the eighth lens and the optical axis to a vertex of an effective radius of the object side surface of the eighth lens, an on-axis distance SAG72 between an intersection of an image side surface of the seventh lens and the optical axis to a vertex of an effective radius of the image side surface of the seventh lens, and an on-axis distance SAG71 between an intersection of an object side surface of the seventh lens and the optical axis to a vertex of an effective radius of the object side surface of the seventh lens satisfy: 1.41 ≤ (SAG81+SAG82) / (SAG71+SAG72) ≤ 1.74.

Images