Optical imaging lens

Abstract

The application provides an optical imaging lens, which comprises 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, wherein the first lens has positive refractive power, the seventh lens has positive refractive power, and the eighth lens has negative refractive power; the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and the half of the image height ImgH corresponding to the maximum field of view angle of the optical imaging lens satisfy the following relationship: 1.5<(f+f7) / ImgH<3.5; the half of the image height ImgH corresponding to the maximum field of view angle of the optical imaging lens and the half Semi-FOV of the maximum field of view angle of the optical imaging lens satisfy the following relationship: 4.5mm<ImgH*TAN(Semi-FOV)<6.5mm; the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the distance BFL on the optical axis from the image side of the eighth lens to the imaging surface of the optical imaging lens satisfy the following relationship: 2.9<TTL / BFL<3.5. The application solves the problem of short back focus of the optical imaging lens in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical imaging lens. BACKGROUND

[0002] With the development of smart phones, users have higher and higher requirements for the photographing function of the phones. In order to improve the imaging quality, a larger number of lenses are often assembled in the optical lens. However, in order to provide a better user experience, the thickness of the smart phone is becoming thinner and thinner, which limits the length of the optical imaging lens and results in that the performance of the lens cannot be fully played. If the optical imaging lens has a telescopic function, that is, the lens is in an extended state in the working state and protrudes from the surface of the back shell of the phone, and the lens is in a retracted state in the non-working state and does not protrude from the surface of the back shell of the phone, the phone will not bring inconvenience when it is used for other functions. However, the existing optical imaging lens has a short back focus and cannot be telescoped and assembled on a thin phone.

[0003] That is, the optical imaging lens in the prior art has the problem of short back focus. SUMMARY

[0004] The main purpose of the present application is to provide an optical imaging lens to solve the problem of short back focus of the optical imaging lens in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical imaging lens is provided, which has only eight lenses and sequentially includes, from the object side to the image side of the optical imaging lens: a first lens having positive refractive power; a second lens; a third lens, the object side surface of the third lens being a convex surface; a fourth lens, the image side surface of the fourth lens being a convex surface; a fifth lens; a sixth lens, the image side surface of the sixth lens being a convex surface; a seventh lens having positive refractive power; and an eighth lens having negative refractive power, the object side surface of the eighth lens being a convex surface; wherein at least two lenses among the second lens to the sixth lens have negative refractive power; the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height ImgH corresponding to the maximum field of view angle of the optical imaging lens satisfy: 1.5<(f+f7) / ImgH<3.5; half of the image height ImgH of the optical imaging lens and half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfy: 4.5mm<ImgH*TAN(Semi-FOV)<6.5mm; and the distance TTL on the optical axis between the object side surface of the first lens to the imaging surface of the optical imaging lens and the distance BFL on the optical axis between the image side surface of the eighth lens to the imaging surface of the optical imaging lens satisfy: 2.9<TTL / BFL<3.5.

[0006] Further, a distance BFL on the optical axis from an image-side surface of the eighth lens to an imaging plane of the optical imaging lens, a distance SAG61 on the optical axis between an intersection of the object-side surface of the sixth lens with the optical axis and an effective radius vertex of the object-side surface of the sixth lens satisfy: -7.5 < BFL / SAG61 < -2.5.

[0007] Further, an effective focal length f of the optical imaging lens, a curvature radius R11 of the object-side surface of the sixth lens satisfy: -4.0 < f / R11 < -1.0.

[0008] Further, a distance TTL on the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens, a sum ∑AT of air gaps on the optical axis of any two adjacent lenses satisfy: 3.0 < TTL / ∑AT < 8.0.

[0009] Further, a center thickness CT4 of the fourth lens, an air gap T67 on the optical axis of the sixth lens and the seventh lens satisfy: 8.6 < CT4 / T67 < 20.0.

[0010] Further, a curvature radius R3 of the object-side surface of the second lens, a curvature radius R12 of the image-side surface of the sixth lens, a curvature radius R15 of the object-side surface of the eighth lens satisfy: 0 < |R3 / (R12+R15)| < 6.5.

[0011] Further, a center thickness CT1 of the first lens, a center thickness CT3 of the third lens, a center thickness CT4 of the fourth lens, an air gap T23 on the optical axis of the second lens and the third lens satisfy: 2.5 < (CT1+CT3+CT4) / T23 < 6.0.

[0012] Further, a distance SAG42 on the optical axis between an intersection of the image-side surface of the fourth lens with the optical axis and an effective radius vertex of the image-side surface of the fourth lens, a distance SAG41 on the optical axis between an intersection of the object-side surface of the fourth lens with the optical axis and an effective radius vertex of the object-side surface of the fourth lens satisfy: 0.5 < SAG42 / SAG41 < 5.5.

[0013] Further, an edge thickness ET5 at a maximum effective diameter of the fifth lens, an edge thickness ET4 at a maximum effective diameter of the fourth lens, an edge thickness ET1 at a maximum effective diameter of the first lens satisfy: 2.0 < (ET5+ET4) / ET1 < 4.5.

[0014] Further, an effective focal length f8 of the eighth lens, a curvature radius R16 of the image-side surface of the eighth lens satisfy: -12.0 < f8 / R16 < -2.5.

[0015] Further, an air gap T78 on the optical axis between the seventh lens and the eighth lens, a distance SAG81 on the optical axis between the intersection of the object side face of the eighth lens and the optical axis to the vertex of the effective radius of the image side face of the eighth lens, a distance SAG72 on the optical axis between the intersection of the image side face of the seventh lens and the optical axis to the vertex of the effective radius of the image side face of the seventh lens satisfy: 0 < T78 / (SAG81-SAG72) < 4.5.

[0016] Further, a distance TD on the optical axis between the object side face of the first lens to the image side face of the eighth lens, a central thickness CT6 of the sixth lens, a central thickness CT7 of the seventh lens satisfy: 3.0 < TD / (CT6+CT7) < 8.0.

[0017] Further, an effective half aperture radius DT82 of the image side face of the eighth lens, an effective half aperture radius DT81 of the object side face of the eighth lens, an effective half aperture radius DT72 of the image side face of the seventh lens satisfy: 5.6 < DT82 / (DT81-DT72) < 10.5.

[0018] Further, an Abbe number V4 of the fourth lens, an Abbe number V5 of the fifth lens, a central thickness CT4 of the fourth lens, a central thickness CT5 of the fifth lens satisfy: 26.5mm -1 (V4-V5) / (CT4+CT5) < 39.5mm -1 .

[0019] Further, a distance BFL on the optical axis between the image side face of the eighth lens to the imaging plane of the optical imaging lens is greater than 2.5mm.

[0020] Further, a curvature radius R15 of the object side face of the eighth lens, a curvature radius R13 of the object side face of the seventh lens satisfy: 0 < R15 / R13 < 1.5.

[0021] According to another aspect of the present application, there is provided an optical imaging lens having only eight lenses, comprising in order from the object side to the image side of the optical imaging lens: a first lens having positive refractive power; a second lens; a third lens having a convex object side surface; a fourth lens having a convex image side surface; a fifth lens; a sixth lens having a convex image side surface; a seventh lens having positive refractive power; and an eighth lens having negative refractive power and a convex object side surface, wherein at least two of the second lens to the sixth lens have negative refractive power; a half of an image height corresponding to a maximum field of view angle of the optical imaging lens, ImgH, and an effective focal length f of the optical imaging lens and an effective focal length f7 of the seventh lens satisfy: 1.5 < (f + f7) / ImgH < 3.5; a half of the image height corresponding to the maximum field of view angle of the optical imaging lens, ImgH, and a half of the maximum field of view angle of the optical imaging lens, Semi-FOV, satisfy: 4.5 mm < ImgH * TAN (Semi-FOV) < 6.5 mm; and a distance TTL on the optical axis from the object side surface of the first lens to an imaging surface of the optical imaging lens and a sum ∑AT of air gaps on the optical axis of any two adjacent lenses satisfy: 3.0 < TTL / ∑AT < 8.0.

[0022] Further, a distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens and a distance SAG61 on the optical axis between the intersection of the optical axis and the object side surface of the sixth lens and the effective radius vertex of the object side surface of the sixth lens satisfy: -7.5 < BFL / SAG61 < -2.5.

[0023] Further, an effective focal length f of the optical imaging lens and a radius of curvature R11 of the object side surface of the sixth lens satisfy: -4.0 < f / R11 < -1.0.

[0024] Further, a central thickness CT4 of the fourth lens and an air gap T67 on the optical axis of the sixth lens and the seventh lens satisfy: 8.6 < CT4 / T67 < 20.0.

[0025] Further, a radius of curvature R3 of the object side surface of the second lens, a radius of curvature R12 of the image side surface of the sixth lens, and a radius of curvature R15 of the object side surface of the eighth lens satisfy: 0 < |R3 / (R12 + R15)| < 6.5.

[0026] Further, a central thickness CT1 of the first lens, a central thickness CT3 of the third lens, a central thickness CT4 of the fourth lens, and an air gap T23 on the optical axis of the second lens and the third lens satisfy: 2.5 < (CT1 + CT3 + CT4) / T23 < 6.0.

[0027] Further, a distance on the optical axis between an intersection of the image-side surface of the fourth lens with the optical axis and an effective radius vertex of the image-side surface of the fourth lens SAG42, a distance on the optical axis between an intersection of the object-side surface of the fourth lens with the optical axis and an effective radius vertex of the object-side surface of the fourth lens SAG41 satisfy: 0.5 < SAG42 / SAG41 < 5.5.

[0028] Further, an edge thickness ET5 at a maximum effective diameter of the fifth lens, an edge thickness ET4 at a maximum effective diameter of the fourth lens, an edge thickness ET1 at a maximum effective diameter of the first lens satisfy: 2.0 < (ET5+ET4) / ET1 < 4.5.

[0029] Further, an effective focal length f8 of the eighth lens, a curvature radius R16 of the image-side surface of the eighth lens satisfy: -12.0 < f8 / R16 < -2.5.

[0030] Further, an air gap T78 on the optical axis between the seventh lens and the eighth lens, a distance on the optical axis between an intersection of the object-side surface of the eighth lens with the optical axis and an effective radius vertex of the object-side surface of the eighth lens SAG81, a distance on the optical axis between an intersection of the image-side surface of the seventh lens with the optical axis and an effective radius vertex of the image-side surface of the seventh lens SAG72 satisfy: 0 < T78 / (SAG81-SAG72) < 4.5.

[0031] Further, a distance on the optical axis between the object-side surface of the first lens and the image-side surface of the eighth lens TD, a central thickness CT6 of the sixth lens, a central thickness CT7 of the seventh lens satisfy: 3.0 < TD / (CT6+CT7) < 8.0.

[0032] Further, an effective half aperture radius DT82 of the image-side surface of the eighth lens, an effective half aperture radius DT81 of the object-side surface of the eighth lens, an effective half aperture radius DT72 of the image-side surface of the seventh lens satisfy: 5.6 < DT82 / (DT81-DT72) < 10.5.

[0033] Further, an Abbe number V4 of the fourth lens, an Abbe number V5 of the fifth lens, a central thickness CT4 of the fourth lens, a central thickness CT5 of the fifth lens satisfy: 26.5mm -1 <(V4-V5) / (CT4+CT5)<39.5mm -1 .

[0034] Further, a distance on the optical axis of the optical imaging lens between the image-side surface of the eighth lens and the imaging surface of the optical imaging lens BFL is greater than 2.5mm.

[0035] Further, the radius of curvature R15 of the object side surface of the eighth lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy 0 < R15 / R13 < 1.5.

[0036] By using the technical solution of the present application, the optical imaging lens has only eight lenses, sequentially 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 from the object side to the image side of the optical imaging lens, the first lens has positive refractive power; the object side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; the image side surface of the sixth lens is a convex surface; the seventh lens has positive refractive power; the eighth lens has negative refractive power, and the object side surface of the eighth lens is a convex surface; at least two lenses among the second lens to the sixth lens have negative refractive power; the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens and half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens satisfy 1.5 < (f+f7) / ImgH < 3.5; half of the image height ImgH of the optical imaging lens and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy 4.5mm < ImgH*TAN(Semi-FOV) < 6.5mm; the distance TTL of the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens and the distance BFL of the image side surface of the eighth lens to the imaging surface of the optical imaging lens on the optical axis satisfy 2.90 < TTL / BFL < 3.50.

[0037] The optical imaging lens with eight lenses of the present application controls the refractive power and surface shape of each lens reasonably, sets f, f7 and ImgH in a reasonable range, makes the refractive power distribution of the optical imaging lens more reasonable, effectively balances aberration and improves the resolving power of the lens. At the same time, in combination with the size of the field angle being in a reasonable range, the effective focal length of the optical imaging lens can be ensured while ensuring that there is enough imaging area to accept light and meeting the long back focal length feature. In combination with the control of TTL and BFL, the lens is further ensured to have a long enough back focal length. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0039] Figure 1 A structure schematic view of the optical imaging lens of example one of the present application is shown;

[0040] Figures 2 to 5 The on-axis chromatic aberration curves, astigmatism curves, distortion curves and magnification chromatic aberration curves of the optical imaging lens in Figure 1 are shown respectively;

[0041] Figure 6 A structural diagram of an optical imaging lens of Example Two of the present application is shown.

[0042] Figures 7 to 10 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Example Two of the present application are shown respectively. Figure 6

[0043] Figure 11 A structural diagram of an optical imaging lens of Example Three of the present application is shown.

[0044] Figures 12 to 15 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Example Three of the present application are shown respectively. Figure 11

[0045] Figure 16 A structural diagram of an optical imaging lens of Example Four of the present application is shown.

[0046] Figures 17 to 20 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Example Four of the present application are shown respectively. Figure 16

[0047] Figure 21 A structural diagram of an optical imaging lens of Example Five of the present application is shown.

[0048] Figures 22 to 25 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Example Five of the present application are shown respectively. Figure 21

[0049] Figure 26 A structural diagram of an optical imaging lens of Example Six of the present application is shown.

[0050] Figures 27 to 30 On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens in Example Six of the present application are shown respectively. Figure 26

[0051] Wherein, the above-mentioned drawings include the following reference signs:

[0052] ​​​​​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, 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

[0053] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, unless otherwise specified. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0054] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0055] 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", "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.

[0056] It should be noted that, in the present specification, the expressions of first, second, third, etc. 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.

[0057] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of illustration. 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.

[0058] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, 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 defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closer to the object side is the object side surface of the lens, and the surface of each lens closer to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the positive or negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software) is used to judge convex or concave. Taking the object side surface as an example, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; taking the image side surface as an example, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0059] In order to solve the problem of short back focal length of optical imaging lenses in the prior art, the present invention provides an optical imaging lens.

[0060] Embodiment 1

[0061] As Figures 1 to 30 shown, the optical imaging lens only has eight lenses, which successively include from the object side to the image side of the optical imaging lens: 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. The first lens has a positive optical power; the object side surface of the third lens is convex; the image side surface of the fourth lens is convex; the image side surface of the sixth lens is convex; the seventh lens has a positive optical power; the eighth lens has a negative optical power, and the object side surface of the eighth lens is convex; among them, at least two of the second lens to the sixth lens have negative optical power; the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens satisfy: 1.5 < (f + f7) / ImgH < 3.5; half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens, and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 4.5mm < ImgH * TAN(Semi-FOV) < 6.5mm; the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, and the distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens satisfy: 2.9 < TTL / BFL < 3.5.

[0062] The optical imaging lens with eight lenses of the present application controls the refractive powers and surface shapes of the lenses reasonably, sets f, f7 and ImgH in a reasonable range, makes the refractive power distribution of the optical imaging lens more reasonable, effectively balances aberrations, and improves the resolving power of the lens. Meanwhile, in combination with the size of the field of view being in a reasonable range, the effective focal length of the optical imaging lens can be ensured while ensuring that there is enough imaging area to accept light and meeting the long back focal length feature. In combination with the control of TTL and BFL, the lens is further ensured to have a long enough back focal length.

[0063] Preferably, the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height corresponding to the maximum field of view angle of the optical imaging lens ImgH satisfy: 1.70<(f+f7) / ImgH<3.20; half of the image height corresponding to the maximum field of view angle of the optical imaging lens ImgH, and half of the maximum field of view angle of the optical imaging lens Semi-FOV satisfy: 5.00mm<ImgH*TAN(Semi-FOV)<6.00mm; the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and the distance BFL on the optical axis from the image side of the eighth lens to the imaging surface of the optical imaging lens satisfy: 3.00<TTL / BFL<3.20.

[0064] In the present embodiment, the distance BFL on the optical axis from the image side of the eighth lens to the imaging surface of the optical imaging lens, and the distance SAG61 on the optical axis between the intersection of the object side of the sixth lens with the optical axis and the effective radius vertex of the object side of the sixth lens satisfy: -7.5<BFL / SAG61<-2.5. By limiting BFL / SAG61 in a reasonable range, it is conducive to the formation of the long back focal length feature of the optical imaging lens. Preferably, -7.00<BFL / SAG61<-3.00.

[0065] In the present embodiment, the effective focal length f of the optical imaging lens and the radius of curvature R11 of the object side of the sixth lens satisfy: -4.0<f / R11<-1.0. By limiting f / R11 in a reasonable range, it is conducive to better balancing aberrations of the optical imaging lens, while improving the processability of the sixth lens. Preferably, -3.80<f / R11<-1.50.

[0066] In the embodiment, the distance TTL on the optical axis between the object side surface of the first lens to the imaging surface of the optical imaging lens, and the sum ∑AT of the air gaps of any two adjacent lenses on the optical axis satisfy: 3.0 < TTL / ∑AT < 8.0. By limiting TTL / ∑AT within a reasonable range, it is beneficial to control the positions of the lenses and reasonably distribute the lens intervals, to obtain sufficient space for long back focal length of the optical imaging lens, and also beneficial to obtain high image quality. Preferably, 4.00 < TTL / ∑AT < 7.50.

[0067] In the embodiment, the center thickness CT4 of the fourth lens, and the air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: 8.6 < CT4 / T67 < 20.0. By limiting CT4 / T67 within a reasonable range, the air gap sensitivity between the fourth lens and the sixth lens and the seventh lens can be effectively adjusted, which is beneficial to adjust the field curvature and improve the MTF yield. Preferably, 9.00 < CT4 / T67 < 19.90.

[0068] In the embodiment, the curvature radius R3 of the object side surface of the second lens, the curvature radius R12 of the image side surface of the sixth lens, and the curvature radius R15 of the object side surface of the eighth lens satisfy: 0 < |R3 / (R12+R15)| < 6.5. By limiting |R3 / (R12+R15)| within a reasonable range, the surface shape of the second lens, the sixth lens and the eighth lens can be controlled, which can effectively eliminate the lens spherical aberration and obtain high image quality. Preferably, 0.25 < |R3 / (R12+R15)| < 5.90.

[0069] In the embodiment, the center thickness CT1 of the first lens, the center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, and the air gap T23 of the second lens and the third lens on the optical axis satisfy: 2.5 < (CT1+CT3+CT4) / T23 < 6.0. By limiting (CT1+CT3+CT4) / T23 within a reasonable range, it is beneficial to reasonably distribute the front end size of the lens, improve the assembly stability, and shorten the overall length of the lens. Preferably, 3.00 < (CT1+CT3+CT4) / T23 < 5.50.

[0070] In the embodiment, the distance SAG42 on the optical axis between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens, the distance SAG41 on the optical axis between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens satisfy: 0.5 < SAG42 / SAG41 < 5.5. By limiting SAG42 / SAG41 within a reasonable range, the marginal ray passing through the fourth lens can be controlled, the imaging quality of the marginal field of view is improved, and the machinability of the fourth lens is improved. Preferably, 1.00 < SAG42 / SAG41 < 4.80.

[0071] In the embodiment, the edge thickness ET5 at the maximum effective diameter of the fifth lens, the edge thickness ET4 at the maximum effective diameter of the fourth lens, and the edge thickness ET1 at the maximum effective diameter of the first lens satisfy: 2.0 < (ET5+ET4) / ET1 < 4.5. By limiting (ET5+ET4) / ET1 within a reasonable range, the edge thickness distribution of the first lens, the fourth lens, and the fifth lens is more reasonable, the machinability of the lens is improved, and the stability of the lens assembly is improved. Preferably, 2.30 < (ET5+ET4) / ET1 < 4.00.

[0072] In the embodiment, the effective focal length f8 of the eighth lens and the radius of curvature R16 of the image-side surface of the eighth lens satisfy: -12.0 < f8 / R16 < -2.5. By limiting f8 / R16 within a reasonable range, it is beneficial to meet the long back focal length characteristic after the light passes through the last lens, while avoiding the limit process of the eighth lens processing. Preferably, -11.50 < f8 / R16 < -3.30.

[0073] In the embodiment, the air gap T78 on the optical axis between the seventh lens and the eighth lens, the distance SAG81 on the optical axis 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, and the distance SAG72 on the optical axis 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 satisfy: 0 < T78 / (SAG81-SAG72) < 4.5. By limiting T78 / (SAG81-SAG72) within a reasonable range, the shape of the seventh lens and the eighth lens and the air gap on the axis between the seventh lens and the eighth lens are more reasonable, which is beneficial to improve the machinability of the seventh lens and the eighth lens, and also improves the stability of the lens assembly. Preferably, 0.10 < T78 / (SAG81-SAG72) < 4.20.

[0074] In the embodiment, the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, the central thickness CT6 of the sixth lens, and the central thickness CT7 of the seventh lens satisfy: 3.0 < TD / (CT6+CT7) < 8.0. By limiting TD / (CT6+CT7) within a reasonable range, the central thickness distribution of the sixth lens and the seventh lens can be more reasonable, which is conducive to improving the processability of the sixth lens and the seventh lens, and also improves the stability of lens assembly. Preferably, 3.50 < TD / (CT6+CT7) < 7.50.

[0075] In the embodiment, the effective half aperture DT82 of the image side surface of the eighth lens, the effective half aperture DT81 of the object side surface of the eighth lens, and the effective half aperture DT72 of the image side surface of the seventh lens satisfy: 5.6 < DT82 / (DT81-DT72) < 10.5. By limiting DT82 / (DT81-DT72) within a reasonable range, the effective diameter of the seventh lens and the eighth lens can not be too large, which is conducive to the miniaturization of the entire lens. Preferably, 6.50 < DT82 / (DT81-DT72) < 9.80.

[0076] In the embodiment, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the central thickness CT4 of the fourth lens, and the central thickness CT5 of the fifth lens satisfy: 26.5mm -1 <(V4-V5) / (CT4+CT5)<39.5mm -1 . The Abbe numbers of the fourth lens and the fifth lens can be more reasonable, which is conducive to reducing the chromatic aberration of the lens. Preferably, 26.00mm -1 <(V4-V5) / (CT4+CT5)<39.00mm -1 .

[0077] In the embodiment, the distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens is greater than 2.5mm, which can ensure that the back focus of the lens is long enough. Preferably, BFL is greater than or equal to 2.91mm.

[0078] In the embodiment, the radius of curvature R15 of the object side surface of the eighth lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy: 0 < R15 / R13 < 1.5. By limiting R15 / R13 within a reasonable range, it is conducive to the processing and molding of the seventh lens and the eighth lens, and improves the assembly stability of the seventh lens and the eighth lens. Preferably, 0.20 < R15 / R13 < 1.40.

[0079] Embodiment two

[0080] As Figures 1 to 30As shown, the optical imaging lens only has eight lenses, sequentially comprising, from the object side 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 third lens is convex; the image side surface of the fourth lens is convex; the image side surface of the sixth lens is convex; the seventh lens has positive refractive power; the eighth lens has negative refractive power, and the object side surface of the eighth lens is convex; wherein at least two lenses among the second lens to the sixth lens have negative refractive power; the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens satisfy: 1.5<(f+f7) / ImgH<3.5; half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens, and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 4.5mm<ImgH*TAN(Semi-FOV)<6.5mm; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and the sum ∑AT of the air gaps of any two adjacent lenses on the optical axis satisfy: 3.0<TTL / ∑AT<8.0.

[0081] The optical imaging lens with eight lenses of the present application controls the refractive power and surface shape of each lens reasonably, sets f, f7 and ImgH within a reasonable range, makes the refractive power distribution of the optical imaging lens more reasonable, effectively balances aberration, and improves the resolving power of the lens. At the same time, in combination with the size of the field angle within a reasonable range, the effective focal length of the optical imaging lens can be ensured while ensuring that there is enough imaging area to accept light, and the long back focal length feature is met. In combination with the control of TTL and ∑AT, it is beneficial to control the position of each lens and reasonably distribute the lens spacing, to obtain enough space for the long back focal length of the optical imaging lens, and also beneficial to obtain high image quality.

[0082] Preferably, the effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens satisfy: 1.70<(f+f7) / ImgH<3.20; half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens, and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 5.00mm<ImgH*TAN(Semi-FOV)<6.00mm; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens, and the sum ∑AT of the air gaps of any two adjacent lenses on the optical axis satisfy: 4.00<TTL / ∑AT<7.50.

[0083] In the embodiment, the distance BFL on the optical axis between the image-side surface of the eighth lens and the imaging surface of the optical imaging lens, and the distance SAG61 on the optical axis between the intersection of the object-side surface of the sixth lens and the optical axis and the effective radius vertex of the object-side surface of the sixth lens satisfy: -7.5 < BFL / SAG61 < -2.5. By limiting BFL / SAG61 within a reasonable range, it is beneficial to the formation of the long back focal feature of the optical imaging lens. Preferably, -7.00 < BFL / SAG61 < -3.00.

[0084] In the embodiment, the effective focal length f of the optical imaging lens and the radius of curvature R11 of the object-side surface of the sixth lens satisfy: -4.0 < f / R11 < -1.0. By limiting f / R11 within a reasonable range, it is beneficial to better balance aberrations of the optical imaging lens, while improving the processability of the sixth lens. Preferably, -3.80 < f / R11 < -1.50.

[0085] In the embodiment, the central thickness CT4 of the fourth lens and the air gap T67 on the optical axis between the sixth lens and the seventh lens satisfy: 8.6 < CT4 / T67 < 20.0. By limiting CT4 / T67 within a reasonable range, the air gap sensitivity between the fourth lens and the sixth lens and the seventh lens can be effectively adjusted, which is beneficial to adjusting the field curvature and improving the MTF yield. Preferably, 9.00 < CT4 / T67 < 19.90.

[0086] In the embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R12 of the image-side surface of the sixth lens, and the radius of curvature R15 of the object-side surface of the eighth lens satisfy: 0 < |R3 / (R12+R15)| < 6.5. By limiting |R3 / (R12+R15)| within a reasonable range, the surface shape of the second lens, the sixth lens, and the eighth lens can be controlled, which can effectively eliminate the spherical aberration of the lens and obtain high image quality. Preferably, 0.25 < |R3 / (R12+R15)| < 5.90.

[0087] In the embodiment, the central thickness CT1 of the first lens, the central thickness CT3 of the third lens, the central thickness CT4 of the fourth lens, and the air gap T23 on the optical axis between the second lens and the third lens satisfy: 2.5 < (CT1+CT3+CT4) / T23 < 6.0. By limiting (CT1+CT3+CT4) / T23 within a reasonable range, it is beneficial to reasonably distribute the front-end size of the lens, improve the assembly stability, and shorten the overall length of the lens. Preferably, 3.00 < (CT1+CT3+CT4) / T23 < 5.50.

[0088] In the embodiment, the distance SAG42 on the optical axis between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens, the distance SAG41 on the optical axis between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens satisfy: 0.5 < SAG42 / SAG41 < 5.5. By limiting SAG42 / SAG41 within a reasonable range, the marginal ray passing through the fourth lens can be controlled, the imaging quality of the marginal field of view is improved, and the machinability of the fourth lens is improved. Preferably, 1.00 < SAG42 / SAG41 < 4.80.

[0089] In the embodiment, the edge thickness ET5 at the maximum effective diameter of the fifth lens, the edge thickness ET4 at the maximum effective diameter of the fourth lens, and the edge thickness ET1 at the maximum effective diameter of the first lens satisfy: 2.0 < (ET5+ET4) / ET1 < 4.5. By limiting (ET5+ET4) / ET1 within a reasonable range, the edge thickness distribution of the first lens, the fourth lens, and the fifth lens is more reasonable, the machinability of the lens is improved, and the stability of the lens assembly is improved. Preferably, 2.30 < (ET5+ET4) / ET1 < 4.00.

[0090] In the embodiment, the effective focal length f8 of the eighth lens and the radius of curvature R16 of the image-side surface of the eighth lens satisfy: -12.0 < f8 / R16 < -2.5. By limiting f8 / R16 within a reasonable range, it is beneficial to meet the long back focal length characteristic after the light passes through the last lens, while avoiding the limit process of the eighth lens processing. Preferably, -11.50 < f8 / R16 < -3.30.

[0091] In the embodiment, the air gap T78 on the optical axis between the seventh lens and the eighth lens, the distance SAG81 on the optical axis 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, and the distance SAG72 on the optical axis 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 satisfy: 0 < T78 / (SAG81-SAG72) < 4.5. By limiting T78 / (SAG81-SAG72) within a reasonable range, the shape of the seventh lens and the eighth lens and the air gap on the axis between the seventh lens and the eighth lens are more reasonable, which is beneficial to improve the machinability of the seventh lens and the eighth lens, and also improves the stability of the lens assembly. Preferably, 0.10 < T78 / (SAG81-SAG72) < 4.20.

[0092] In the embodiment, the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, the center thickness CT6 of the sixth lens, and the center thickness CT7 of the seventh lens satisfy 3.0 < TD / (CT6+CT7) < 8.0. By limiting TD / (CT6+CT7) within a reasonable range, the center thickness distribution of the sixth lens and the seventh lens can be more reasonable, which is conducive to improving the processability of the sixth lens and the seventh lens and also improves the stability of lens assembly. Preferably, 3.50 < TD / (CT6+CT7) < 7.50.

[0093] In the embodiment, the effective half aperture DT82 of the image side surface of the eighth lens, the effective half aperture DT81 of the object side surface of the eighth lens, and the effective half aperture DT72 of the image side surface of the seventh lens satisfy 5.6 < DT82 / (DT81-DT72) < 10.5. By limiting DT82 / (DT81-DT72) within a reasonable range, the effective diameters of the seventh lens and the eighth lens can not be too large, which is conducive to the miniaturization of the entire lens. Preferably, 6.50 < DT82 / (DT81-DT72) < 9.80.

[0094] In the embodiment, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the center thickness CT4 of the fourth lens, and the center thickness CT5 of the fifth lens satisfy 26.5 mm -1 <(V4-V5) / (CT4+CT5)<39.5 mm -1 . The Abbe numbers of the fourth lens and the fifth lens can be more reasonable, which is conducive to reducing the chromatic aberration of the lens. Preferably, 26.00 mm -1 <(V4-V5) / (CT4+CT5)<39.00 mm -1 .

[0095] In the embodiment, the distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens is greater than 2.5 mm, which can ensure that the back focus of the lens is long enough. Preferably, BFL is greater than or equal to 2.91 mm.

[0096] In the embodiment, the radius of curvature R15 of the object side surface of the eighth lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy 0 < R15 / R13 < 1.5. By limiting R15 / R13 within a reasonable range, the processing and molding of the seventh lens and the eighth lens are facilitated, and the assembly stability of the seventh lens and the eighth lens is improved. Preferably, 0.20 < R15 / R13 < 1.40.

[0097] Optionally, the above optical imaging lens can further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0098] The optical imaging lens in this application can employ multiple lenses, such as the eight lenses mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis distance between each lens, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the manufacturability of the lens can be improved, making the optical imaging lens more conducive to production and processing and suitable for portable electronic devices such as smartphones.

[0099] In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0100] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although an embodiment is described using eight lenses as an example, the optical imaging lens is not limited to including eight lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0101] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments.

[0102] It should be noted that any of the examples one through six below are applicable to all embodiments of this application.

[0103] Example 1

[0104] like Figures 1 to 5 As shown, an optical imaging lens of Example 1 of this application is described. Figure 1 A schematic diagram of the optical imaging lens structure of Example 1 is shown.

[0105] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side, an aperture 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.

[0106] 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 convex, 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 concave, 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 convex. 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 convex. 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.

[0107] Table 1 shows the basic structure parameter table of the optical imaging lens of Example One, wherein the units of the radius of curvature, the thickness / distance, and the focal length are millimeters (mm).

[0108] Face number Face type Radius of curvature Thickness Refractive index Abbe number Conic constant OBJ Sphere Infinity Infinity STO Sphere Infinity -0.8705 S1 Asphere 3.8844 1.0209 1.546 55.92 0 S2 Asphere 13.8495 0.0500 0 S3 Asphere 4.2003 0.4000 1.667 20.37 0 S4 Asphere 3.2008 0.7332 0 S5 Asphere 11.2713 0.4000 1.677 19.24 0 S6 Asphere 8.7044 0.2577 0 S7 Asphere 341.6478 0.9927 1.546 55.92 0 S8 Asphere -7.8780 0.4800 0 S9 Asphere -12.8548 0.4577 1.677 19.24 0 S10 Asphere -26.8018 0.6221 0 S11 Asphere -2.4119 0.5445 1.619 25.93 -1 S12 Asphere -3.2473 0.0500 -1 S13 Asphere 2.9480 0.6109 1.546 55.92 -1 S14 Asphere -86.2101 0.4547 0 S15 Asphere 3.9763 0.4000 1.537 55.71 -1 S16 Asphere 1.7561 2.8386 -1 S17 Sphere Infinity 0.2100 1.518 64.17 S18 Sphere Infinity 0.4751 S19 Sphere Infinity

[0109] Table 1

[0110] In Example One, 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:

[0111]

[0112] 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-S16 in Example One.

[0113] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.78E-02 5.56E-01 -1.35E+01 1.54E+02 -1.04E+03 4.53E+03 -1.37E+04 S2 -4.30E-01 5.21E+00 -2.84E+01 3.12E+01 5.61E+02 -4.09E+03 1.50E+04 S3 -5.67E-01 4.82E+00 -3.55E+01 1.80E+02 -6.63E+02 1.87E+03 -4.16E+03 S4 -1.87E-01 -3.66E-01 1.12E+01 -1.19E+02 7.47E+02 -3.13E+03 9.18E+03 S5 -3.19E-01 1.56E+00 -2.33E+01 2.10E+02 -1.23E+03 4.95E+03 -1.41E+04 S6 -4.28E-01 7.98E-01 -8.82E+00 6.82E+01 -3.37E+02 1.12E+03 -2.56E+03 S7 -2.73E-01 1.26E+00 -1.99E+01 1.83E+02 -1.08E+03 4.34E+03 -1.24E+04 S8 -3.52E-01 -1.74E+00 1.49E+01 -8.46E+01 3.32E+02 -8.18E+02 9.47E+02 S9 -2.07E-01 -1.26E+01 9.30E+01 -5.29E+02 2.33E+03 -7.59E+03 1.79E+04 S10 1.41E+00 -2.29E+01 1.75E+02 -1.09E+03 5.34E+03 -1.95E+04 5.28E+04 S11 8.20E+00 -5.42E+01 3.75E+02 -2.23E+03 1.01E+04 -3.38E+04 8.27E+04 S12 -1.38E+00 -2.48E+00 1.46E+02 -1.39E+03 7.47E+03 -2.60E+04 6.21E+04 S13 -5.01E+00 2.21E+01 -3.13E+02 2.17E+03 -8.70E+03 1.78E+04 3.88E+03 S14 4.13E+01 -5.14E+02 4.06E+03 -2.36E+04 1.02E+05 -3.25E+05 7.84E+05 S15 -2.16E+01 -2.33E+02 4.79E+03 -4.23E+04 2.30E+05 -8.42E+05 2.16E+06 S16 -7.31E+01 5.27E+02 -2.96E+03 1.21E+04 -3.50E+04 7.15E+04 -1.09E+05 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.91E+04 -4.45E+04 4.83E+04 -3.66E+04 1.83E+04 -5.45E+03 7.32E+02 S2 -3.50E+04 5.55E+04 -6.06E+04 4.48E+04 -2.15E+04 6.04E+03 -7.51E+02 S3 7.34E+03 -1.01E+04 1.06E+04 -7.99E+03 4.09E+03 -1.26E+03 1.76E+02 S4 -1.92E+04 2.88E+04 -3.07E+04 2.27E+04 -1.11E+04 3.22E+03 -4.19E+02 S5 2.87E+04 -4.21E+04 4.41E+04 -3.22E+04 1.55E+04 -4.44E+03 5.70E+02 S6 4.06E+03 -4.39E+03 3.07E+03 -1.18E+03 8.45E+01 1.08E+02 -3.02E+01 S7 2.55E+04 -3.80E+04 4.06E+04 -3.03E+04 1.50E+04 -4.43E+03 5.90E+02 S8 9.06E+02 -5.65E+03 1.06E+04 -1.14E+04 7.34E+03 -2.66E+03 4.20E+02 S9 -3.02E+04 3.64E+04 -3.09E+04 1.80E+04 -6.90E+03 1.59E+03 -1.71E+02 S10 -1.05E+05 1.53E+05 -1.62E+05 1.21E+05 -6.04E+04 1.81E+04 -2.44E+03 S11 -1.49E+05 1.98E+05 -1.92E+05 1.32E+05 -6.08E+04 1.69E+04 -2.15E+03 S12 -1.06E+05 1.33E+05 -1.22E+05 8.18E+04 -3.77E+04 1.07E+04 -1.41E+03 S13 -1.36E+05 4.12E+05 -6.79E+05 6.87E+05 -4.28E+05 1.51E+05 -2.30E+04 S14 -1.43E+06 1.98E+06 -2.02E+06 1.47E+06 -7.24E+05 2.15E+05 -2.88E+04 S15 -3.96E+06 5.24E+06 -4.98E+06 3.31E+06 -1.47E+06 3.90E+05 -4.70E+04 S16 1.44E+05 -1.96E+05 2.57E+05 -2.60E+05 1.72E+05 -6.52E+04 1.07E+04

[0114] Table 2

[0115] Figure 2On-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 at different image heights after passing through the optical imaging lens.

[0116] According to Figure 2 and Figure 5 It can be known that the optical imaging lens of Example One can achieve good imaging quality.

[0117] Example Two

[0118] As Figures 6 to 10 shown, the optical imaging lens of Example Two of the present application is described. Figure 6 A structural diagram of the optical imaging lens of Example Two is shown. For the sake of brevity, part of the similar description with Example One will be omitted.

[0119] As Figure 6 shown, the optical imaging lens sequentially includes 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 from the object side to the image side.

[0120] 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 positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is a concave 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 concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens E7 has positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a convex surface. The eighth lens E8 has negative refractive power, the object side surface S15 of the eighth lens is a convex surface, and the image side surface S16 of the eighth lens is a concave surface. 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.

[0121] Table 3 shows the basic structure parameters of the optical imaging lens of Example Two, wherein the units of the curvature radius, the thickness / distance and the focal length are all millimeters (mm).

[0122]

[0123]

[0124] Table 3

[0125] Table 4 gives the high-order term coefficients of each aspherical surface S1-S16 that can be used in Example Two. The surface shape of each aspherical lens can be defined by using the formula (1) in Example One.

[0126] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.50E-04 1.11E-02 -4.56E-02 1.02E-01 -1.37E-01 1.19E-01 -6.93E-02 S2 -4.18E-02 1.46E-01 -2.97E-01 3.18E-01 -7.90E-02 -2.45E-01 3.80E-01 S3 -5.53E-02 1.70E-01 -4.20E-01 6.78E-01 -7.34E-01 5.43E-01 -2.74E-01 S4 -2.20E-02 2.86E-02 6.00E-03 -3.52E-01 1.33E+00 -2.68E+00 3.49E+00 S5 -2.51E-02 5.97E-02 -3.19E-01 9.88E-01 -1.96E+00 2.61E+00 -2.38E+00 S6 -3.74E-02 4.82E-02 -1.97E-01 5.08E-01 -8.57E-01 9.93E-01 -8.06E-01 S7 -3.93E-02 5.88E-02 -2.51E-01 6.80E-01 -1.23E+00 1.57E+00 -1.45E+00 S8 -2.36E-02 -5.86E-02 1.78E-01 -3.96E-01 6.22E-01 -6.88E-01 5.42E-01 S9 -1.22E-02 -8.97E-02 1.46E-01 -2.16E-01 2.62E-01 -2.27E-01 1.38E-01 S10 1.91E-02 -3.41E-02 4.46E-03 1.18E-02 -7.99E-03 7.05E-04 1.47E-03 S11 4.43E-02 1.02E-01 -2.31E-01 2.79E-01 -2.33E-01 1.43E-01 -6.64E-02 S12 -7.42E-02 9.71E-02 -1.28E-01 1.42E-01 -1.17E-01 6.95E-02 -2.97E-02 S13 7.16E-02 -1.40E-01 1.11E-01 -6.13E-02 2.39E-02 -6.66E-03 1.39E-03 S14 2.52E-01 -3.02E-01 2.29E-01 -1.26E-01 5.01E-02 -1.45E-02 3.08E-03 S15 -1.34E-01 -3.41E-02 8.04E-02 -5.50E-02 2.21E-02 -5.88E-03 1.09E-03 S16 -2.52E-01 1.26E-01 -5.10E-02 1.57E-02 -3.59E-03 6.15E-04 -7.98E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.72E-02 -7.01E-03 1.10E-03 -7.36E-05 -5.14E-06 1.28E-06 -6.80E-08 S2 -2.92E-01 1.42E-01 -4.60E-02 9.99E-03 -1.40E-03 1.15E-04 -4.17E-06 S3 8.97E-02 -1.55E-02 -5.96E-04 1.03E-03 -2.49E-04 2.83E-05 -1.31E-06 S4 -3.11E+00 1.93E+00 -8.41E-01 2.52E-01 -4.94E-02 5.72E-03 -2.97E-04 S5 1.49E+00 -6.20E-01 1.58E-01 -1.81E-02 -1.70E-03 7.64E-04 -6.75E-05 S6 4.64E-01 -1.88E-01 5.25E-02 -9.60E-03 1.03E-03 -5.00E-05 0.00E+00 S7 9.83E-01 -4.88E-01 1.75E-01 -4.42E-02 7.45E-03 -7.50E-04 3.40E-05 S8 -3.08E-01 1.27E-01 -3.79E-02 7.92E-03 -1.10E-03 9.25E-05 -3.52E-06 S9 -5.81E-02 1.70E-02 -3.40E-03 4.43E-04 -3.43E-05 1.27E-06 -7.79E-09 S10 -9.20E-04 2.99E-04 -6.40E-05 9.54E-06 -9.61E-07 5.86E-08 -1.61E-09 S11 2.30E-02 -5.93E-03 1.11E-03 -1.49E-04 1.33E-05 -7.21E-07 1.77E-08 S12 9.10E-03 -1.99E-03 3.06E-04 -3.25E-05 2.26E-06 -9.28E-08 1.71E-09 S13 -2.44E-04 3.93E-05 -5.50E-06 5.78E-07 -4.00E-08 1.60E-09 -2.77E-11 S14 -4.84E-04 5.63E-05 -4.80E-06 2.92E-07 -1.20E-08 2.97E-10 -3.37E-12 S15 -1.42E-04 1.34E-05 -9.03E-07 4.24E-08 -1.32E-09 2.44E-11 -2.04E-13 S16 7.89E-06 -5.95E-07 3.36E-08 -1.38E-09 3.89E-11 -6.69E-13 5.28E-15

[0127] Table 4

[0128] Figure 7 The axial chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the convergence focal point 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 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 light rays on the imaging surface after passing through the optical imaging lens at different image heights.

[0129] According to Figure 7 and Figure 10 it can be known that the optical imaging lens given in Example Two can achieve good imaging quality.

[0130] Example Three

[0131] As Figures 11 to 15 shown, the optical imaging lens of Example Three of the present application is described. Figure 11 The structure schematic diagram of the optical imaging lens of Example Three is shown. For the sake of brevity, part of the similar description with Example One will be omitted.

[0132] 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, an eighth lens E8, a filter E9 and an imaging surface S19 from the object side to the image side.

[0133] 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 convex. 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 convex. The fifth lens E5 has negative 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 concave, and the image-side surface S12 of the sixth lens is convex. 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 convex. 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 an object passes through the surfaces S1-S18 in sequence and is ultimately imaged on an image plane S19.

[0134] Table 5 shows the basic structure parameters 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).

[0135]

[0136]

[0137] Table 5

[0138] Table 6 gives the high-order term coefficients of the aspherical surfaces S1-S16 that can be used in Example Three. The surface shape of each aspherical lens can be defined by using the formula (1) in Example One.

[0139] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.54E-04 1.54E-02 -5.23E-02 1.05E-01 -1.31E-01 1.07E-01 -5.95E-02 S2 -4.03E-02 1.09E-01 -2.02E-01 2.08E-01 -6.25E-02 -1.20E-01 1.89E-01 S3 -5.35E-02 1.23E-01 -2.97E-01 4.94E-01 -5.75E-01 4.86E-01 -3.04E-01 S4 -2.06E-02 -2.98E-03 1.63E-01 -8.62E-01 2.42E+00 -4.32E+00 5.22E+00 S5 -1.88E-02 6.94E-02 -3.72E-01 1.15E+00 -2.34E+00 3.27E+00 -3.22E+00 S6 -2.83E-02 2.56E-02 -1.02E-01 2.36E-01 -3.74E-01 4.14E-01 -3.27E-01 S7 -3.88E-02 5.12E-02 -2.24E-01 6.26E-01 -1.16E+00 1.48E+00 -1.35E+00 S8 -1.58E-02 -4.73E-02 1.63E-01 -3.86E-01 6.42E-01 -7.47E-01 6.15E-01 S9 -4.46E-03 -5.54E-02 7.70E-02 -1.10E-01 1.40E-01 -1.31E-01 8.42E-02 S10 1.12E-02 -2.69E-03 -4.70E-02 7.34E-02 -6.41E-02 3.91E-02 -1.80E-02 S11 1.10E-02 1.68E-01 -3.24E-01 3.72E-01 -3.04E-01 1.84E-01 -8.38E-02 S12 -8.15E-02 1.19E-01 -1.66E-01 1.84E-01 -1.50E-01 8.81E-02 -3.73E-02 S13 8.05E-02 -1.54E-01 1.28E-01 -7.63E-02 3.31E-02 -1.06E-02 2.54E-03 S14 2.29E-01 -2.65E-01 1.93E-01 -1.04E-01 4.12E-02 -1.19E-02 2.55E-03 S15 -1.37E-01 -1.49E-02 5.86E-02 -4.20E-02 1.72E-02 -4.63E-03 8.59E-04 S16 -2.31E-01 1.13E-01 -4.56E-02 1.42E-02 -3.31E-03 5.85E-04 -7.92E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.22E-02 -5.37E-03 7.38E-04 -2.36E-05 -9.33E-06 1.46E-06 -7.05E-08 S2 -1.41E-01 6.55E-02 -2.03E-02 4.23E-03 -5.67E-04 4.44E-05 -1.55E-06 S3 1.42E-01 -4.94E-02 1.24E-02 -2.19E-03 2.51E-04 -1.66E-05 4.62E-07 S4 -4.42E+00 2.65E+00 -1.13E+00 3.31E-01 -6.38E-02 7.29E-03 -3.74E-04 S5 2.26E+00 -1.13E+00 3.94E-01 -9.41E-02 1.44E-02 -1.25E-03 4.47E-05 S6 1.85E-01 -7.48E-02 2.10E-02 -3.92E-03 4.37E-04 -2.20E-05 0.00E+00 S7 8.93E-01 -4.30E-01 1.49E-01 -3.61E-02 5.82E-03 -5.59E-04 2.42E-05 S8 -3.62E-01 1.53E-01 -4.60E-02 9.62E-03 -1.33E-03 1.09E-04 -4.03E-06 S9 -3.77E-02 1.18E-02 -2.55E-03 3.78E-04 -3.63E-05 2.04E-06 -5.07E-08 S10 6.33E-03 -1.67E-03 3.19E-04 -4.24E-05 3.70E-06 -1.90E-07 4.34E-09 S11 2.85E-02 -7.17E-03 1.31E-03 -1.70E-04 1.47E-05 -7.66E-07 1.81E-08 S12 1.13E-02 -2.46E-03 3.79E-04 -4.02E-05 2.81E-06 -1.16E-07 2.14E-09 S13 -4.77E-04 7.17E-05 -8.49E-06 7.47E-07 -4.48E-08 1.60E-09 -2.56E-11 S14 -4.03E-04 4.72E-05 -4.04E-06 2.47E-07 -1.02E-08 2.53E-10 -2.88E-12 S15 -1.13E-04 1.07E-05 -7.16E-07 3.35E-08 -1.04E-09 1.91E-11 -1.59E-13 S16 8.27E-06 -6.62E-07 3.98E-08 -1.73E-09 5.15E-11 -9.27E-13 7.63E-15

[0140] Table 6

[0141] Figure 12 The axial chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the deviation of convergent 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 magnification chromatic aberration curve of the optical imaging lens of Example Three is shown, which represents the deviation of light rays on the image plane after passing through the optical imaging lens at different image heights.

[0142] According to Figure 12 and Figure 15 It can be seen that the optical imaging lens provided in Example Three can achieve good imaging quality.

[0143] Example Four

[0144] As shown in Figures 16 to 20 , the optical imaging lens of Example Four of the present application is described. Figure 16 The structural diagram of the optical imaging lens of Example Four is shown. For brevity, some similar descriptions with Example One will be omitted.

[0145] As shown in Figure 16 , the optical imaging lens sequentially includes 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 from the object side to the image side.

[0146] 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 convex. 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 concave, and the image side surface S12 of the sixth lens is convex. 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.

[0147] 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).

[0148]

[0149]

[0150] Table 7

[0151] The high order term coefficients of each aspherical surface S1-S16 used in Example Four are given in Table 8. The surface shape of each aspherical surface can be defined by using the formula (1) in Example One.

[0152]

[0153]

[0154] Table 8

[0155] Figure 17 The axial chromatic aberration curve of the optical imaging lens arrangement of Example Four is shown, which indicates the convergence point deviation of light rays with different wavelengths after passing through the optical imaging lens arrangement. Figure 18 The astigmatism curve of the optical imaging lens arrangement of Example Four is shown, which indicates the meridional image curvature and sagittal image curvature. Figure 19 The distortion curve of the optical imaging lens arrangement of Example Four is shown, which indicates the distortion size values corresponding to different field angles. Figure 20 The lateral chromatic aberration curve of the optical imaging lens arrangement of Example Four is shown, which indicates the deviation of light rays on the imaging plane after passing through the optical imaging lens arrangement.

[0156] According to Figure 17 and Figure 20 it can be known that the optical imaging lens arrangement provided in Example Four can achieve good imaging quality.

[0157] Example Five

[0158] As shown in Figures 21 to 25 , the optical imaging lens arrangement of Example Five of the present application is described. Figure 21 The structure diagram of the optical imaging lens arrangement of Example Five is shown. For brevity, some similar descriptions with Example One will be omitted.

[0159] As shown in Figure 21 , the optical imaging lens arrangement comprises, 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, an eighth lens E8, a filter E9, and an imaging surface S19.

[0160] 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 negative 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 positive refractive power, the object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The fifth lens E5 has negative refractive power, the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens E6 has positive refractive power, the object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is convex. 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 an object passes through the surfaces S1-S18 in sequence and is ultimately imaged on an image plane S19.

[0161] Table 9 shows the basic structure parameters of the optical imaging lens of Example Five, wherein the units of the radius of curvature, the thickness / distance, and the focal length are millimeters (mm).

[0162]

[0163]

[0164] Table 9

[0165] Table 10 gives the high-order term coefficients of the aspherical surfaces S1-S16 that can be used in Example Five. The surface shape of each aspherical lens can be defined by using the formula (1) in Example One.

[0166]

[0167]

[0168] Table 10

[0169] Figure 22 The axial chromatic aberration curve of the optical imaging lens of Example Five is shown, which represents the convergence focal point deviation 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 surface curvature and the sagittal image surface 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 of view. Figure 25The focal power chromatic aberration curve of the optical imaging lens of Example Five is shown, which represents the deviation of light rays at different image heights on the imaging plane after passing through the optical imaging lens.

[0170] According to Figure 22 and Figure 25 It can be known that the optical imaging lens given in Example Five can achieve good imaging quality.

[0171] Example Six

[0172] As Figures 26 to 30 shown, the optical imaging lens of Example Six of the present application is described. Figure 26 The structural diagram of the optical imaging lens of Example Six is shown. For the sake of brevity, part of the similar description with Example One will be omitted.

[0173] As Figure 26 shown, the optical imaging lens sequentially includes 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 from the object side to the image side.

[0174] The first lens E1 has positive focal 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 positive focal 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 positive focal power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a concave surface. The fourth lens E4 has positive focal 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 focal power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens E6 has negative focal power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens E7 has positive focal power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a convex surface. The eighth lens E8 has negative focal power, the object side surface S15 of the eighth lens is a convex surface, and the image side surface S16 of the eighth lens is a concave surface. 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.

[0175] Table 11 shows the basic structure parameter table of the optical imaging lens of Example Six, wherein the units of the curvature radius, the thickness / distance, and the focal length are all millimeters (mm).

[0176]

[0177]

[0178] Table 11

[0179] Table 12 gives the high order term coefficients of each aspherical surface S1-S16 used in Example Six. The surface shape of each aspherical lens can be defined by using the formula (1) in Example One.

[0180]

[0181]

[0182] Table 12

[0183] Figure 27 The on-axis chromatic aberration curve of the optical imaging lens of Example Six is shown, which indicates the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 28 The astigmatism curve of the optical imaging lens of Example Six is shown, which indicates the meridional image curvature and sagittal image curvature. Figure 29 The distortion curve of the optical imaging lens of Example Six is shown, which indicates the distortion size values corresponding to different field angles. Figure 30 The lateral chromatic aberration curve of the optical imaging lens of Example Six is shown, which indicates the deviation of light rays on the imaging plane after passing through the optical imaging lens.

[0184] According to Figure 27 and Figure 30 It can be known that the optical imaging lens provided in Example Six can achieve good imaging quality.

[0185] In summary, Examples One to Six respectively satisfy the relationships shown in Table 13.

[0186] Conditional expression / Example One Two Three Four Five Six (f+f7) / Imgh 1.94 2.09 2.16 2.27 3.04 2.21 ImgH*TAN(Semi-FOV)(mm) 5.94 5.21 5.11 5.10 5.12 5.15 BFL 3.52 2.92 2.91 2.92 2.93 3.01 TTL / BFL 3.12 3.08 3.10 3.05 3.17 3.18 BFL / SAG61 -3.21 -3.66 -3.88 -3.54 -5.28 -6.83 f / R11 -3.68 -2.89 -2.67 -2.91 -1.79 -1.77 TTL / ∑AT 4.15 5.12 4.97 4.89 5.66 7.33 R15 / R13 1.35 0.64 0.66 0.61 0.44 0.40 CT4 / T67 19.85 13.98 9.41 10.58 15.66 13.50 |R3 / (R12+R15)| 5.76 3.54 3.02 2.87 2.98 0.36 (CT1+CT3+CT4) / T23 3.29 4.22 3.89 4.39 5.19 3.63 SAG42 / SAG41 4.32 2.79 1.16 1.17 3.69 3.16 (ET5+ET4) / ET1 2.74 2.62 3.04 2.60 3.75 3.97 f8 / R16 -3.56 -5.72 -6.13 -6.66 -7.48 -11.31 T78 / (SAG81-SAG72) 3.62 2.71 3.99 2.26 1.03 0.18 TD / (CT6+CT7) 6.47 6.19 6.68 7.37 5.28 3.73 DT82 / (DT81-DT72) 9.06 8.07 7.63 6.66 7.14 9.45 (V4-V5) / (CT4+CT5) (mm -1 )]]> 25.30 33.40 38.77 28.63 29.07 27.70

[0187] Table 13

[0188] Table 14 gives the effective focal length f of the optical imaging lens of Examples One to Six, and the effective focal lengths f1 to f8 of each lens.

[0189]

[0190]

[0191] Table 14

[0192] The present application also provides an imaging device, and the electronic photosensitive element thereof can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate 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.

[0193] Obviously, the above-described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present application.

[0194] 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 consistent with 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, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0195] It is to be noted that the terms "first", "second", and the like in the description and in the claims of this application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of efficient use, orderly implementation, and / or other operational benefits.

[0196] 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. Accordingly, the application is not limited, except as by the appended claims.

Claims

1. An optical imaging lens, characterized in that, The optical imaging lens only has eight lenses, sequentially from the object side to the image side of the optical imaging lens comprising: a first lens having positive refractive power, the object side surface of the first lens being convex, the image side surface of the first lens being concave; a second lens, the object side surface of the second lens being convex, the image side surface of the second lens being concave; a third lens, the object side surface of the third lens being convex; a fourth lens, the image side surface of the fourth lens being convex; a fifth lens, the object side surface of the fifth lens being concave; a sixth lens, the object side surface of the sixth lens being concave, the image side surface of the sixth lens being convex; a seventh lens having positive refractive power, the object side surface of the seventh lens being convex; an eighth lens having negative refractive power, the object side surface of the eighth lens being convex, the image side surface of the eighth lens being concave; The refractive powers of the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens are negative-negative-positive-negative-negative, or negative-positive-positive-negative-negative, or negative-positive-negative-negative-negative, or negative-positive-negative-positive-negative, or negative-negative-positive-negative-positive, or positive-positive-positive-negative-negative in turn. The effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens satisfy: 1.94≤(f+f7) / ImgH≤3.

04. Half of the image height ImgH corresponding to the maximum field angle of the optical imaging lens and half of the maximum field angle Semi-FOV of the optical imaging lens satisfy: 5.10mm≤ImgH*TAN(Semi-FOV)≤5.94mm. The distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens and the distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens satisfy: 3.05≤TTL / BFL≤3.

18. 2.The optical imaging lens according to claim 1, wherein, The distance BFL on the optical axis from the image side surface of the eighth lens to the imaging surface of the optical imaging lens and the distance SAG61 on the optical axis between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens satisfy: -6.83≤BFL / SAG61≤-3.

21. 3.The optical imaging lens according to claim 1, wherein, The effective focal length f of the optical imaging lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy: -3.68≤f / R11≤-1.

77. 4.The optical imaging lens according to claim 1, wherein, The distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens and the sum ∑AT of the air gaps of any two adjacent lenses on the optical axis satisfy: 4.15≤TTL / ∑AT≤7.

33.

5. The optical imaging lens according to claim 1, characterized in that, The central thickness CT4 of the fourth lens and the air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: 9.41≤CT4 / T67≤19.

85. 6.The optical imaging lens according to claim 1, wherein, A relationship among a curvature radius R3 of an object side surface of the second lens, a curvature radius R12 of an image side surface of the sixth lens, and a curvature radius R15 of an object side surface of the eighth lens satisfies: 0.36≤|R3 / (R12+R15)|≤5.

76. 7.The optical imaging lens according to claim 1, wherein, A relationship among a central thickness CT1 of the first lens, a central thickness CT3 of the third lens, a central thickness CT4 of the fourth lens, and an air gap T23 of the second lens and the third lens on the optical axis satisfies: 3.29≤(CT1+CT3+CT4) / T23≤5.

19. 8.The optical imaging lens according to claim 1, wherein, A relationship between a distance SAG42 on the optical axis between an intersection of the 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, and a distance SAG41 on the optical axis between an intersection of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens satisfies: 1.16≤SAG42 / SAG41≤4.

32.

9. The optical imaging lens according to any one of claims 1-8, wherein, A relationship among an edge thickness ET5 at a maximum effective diameter of the fifth lens, an edge thickness ET4 at a maximum effective diameter of the fourth lens, and an edge thickness ET1 at a maximum effective diameter of the first lens satisfies: 2.60≤(ET5+ET4) / ET1≤3.

97. 10.The optical imaging lens according to any one of claims 1 to 8, characterized in that, A relationship between an effective focal length f8 of the eighth lens and a curvature radius R16 of an image side surface of the eighth lens satisfies: -11.31≤f8 / R16≤-3.

56.

11. The optical imaging lens according to any one of claims 1-8, wherein, A relationship among an air gap T78 of the seventh lens and the eighth lens on the optical axis, a distance SAG81 on the optical axis between an intersection of the object side surface of the eighth lens and the optical axis to an effective radius vertex of the object side surface of the eighth lens, and a distance SAG72 on the optical axis between an intersection of the image side surface of the seventh lens and the optical axis to an effective radius vertex of the image side surface of the seventh lens satisfies: 0.18≤T78 / (SAG81-SAG72)≤3.

99.

12. The optical imaging lens according to any one of claims 1-8, wherein, A relationship among a distance TD on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens, a central thickness CT6 of the sixth lens, and a central thickness CT7 of the seventh lens satisfies: 3.73≤TD / (CT6+CT7)≤7.

37.

13. The optical imaging lens according to any one of claims 1-8, wherein, A relationship among an effective half aperture radius DT82 of the image side surface of the eighth lens, an effective half aperture radius DT81 of the object side surface of the eighth lens, and an effective half aperture radius DT72 of the image side surface of the seventh lens satisfies: 6.66≤DT82 / (DT81-DT72)≤9.

45.

14. The optical imaging lens according to any one of claims 1-8, wherein, The Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens satisfy: 25.30 mm -1 ≤ (V4-V5) / (CT4+CT5) ≤ 38.77 mm -1 .

15. The optical imaging lens according to any one of claims 1-8, wherein, A distance BFL on the optical axis from the image side surface of the eighth lens to an imaging surface of the optical imaging lens satisfies: 2.5mm<BFL≤3.52mm.

16. The optical imaging lens according to any one of claims 1-8, wherein, A relationship between a curvature radius R15 of the object side surface of the eighth lens and a curvature radius R13 of the object side surface of the seventh lens satisfies: 0.40≤R15 / R13≤1.35.

Images