Optical imaging lens

Abstract

The invention provides an optical imaging lens, the optical imaging lens has eight lenses with focal power, and the optical imaging lens comprises a lens group, a spacing element group and a lens barrel group, the effective focal length f4 of the fourth lens and the interval EP34 between the third spacing element and the fourth spacing element in the direction of the optical axis of the optical imaging lens meet the condition that f4 / EP34 is greater than or equal to-10.62 and less than or equal to-5.20; the curvature radius R8 of the image side face of the fourth lens, the outer diameter D4s of the object side face of the fourth spacing element and the inner diameter d4s of the object side face of the fourth spacing element meet the condition that R8 / (D4s-d4s) is larger than or equal to 0.87 and smaller than or equal to 1.65. The multi-group optical imaging lens solves the problems that the middle group of the multi-group optical imaging lens in the prior art is unstable and stray light is serious.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[0002] The periscope telephoto lens has changed the placement of conventional telephoto lenses and broken through the bottleneck of size limiting the multiples. As terminal portable devices develop towards being lighter, thinner and smaller, the periscope telephoto optical imaging lens has further weakened the size limitation. However, in the multi-group optical imaging lens, under the premise that the surface inclination of the fourth lens is large, the curvature and edge thickness of the fourth lens surface are large, which is not conducive to the processing of the fourth lens and the assembly stability of the optical imaging lens. In addition, the extended light path of the light of the multi-group optical imaging lens after passing through the image side of the eighth lens will pass through the fourth lens again, and the fourth lens is not effective in blocking the stray light path. Therefore, how to control the external dimensions of the fourth lens and the spacing element of the optical imaging lens to block stray light and improve the imaging quality while ensuring the processability and assembly stability of the fourth lens is a very important issue. Summary of the invention

[0003] The main purpose of the present invention is to provide an optical imaging lens to solve the problems of unstable central assembly and serious stray light in the prior art multi-group optical imaging lenses.

[0004] In order to achieve the above-mentioned object, according to one aspect of the present invention, an optical imaging lens is provided, wherein the number of lenses having optical power of the optical imaging lens is eight, and the optical imaging lens comprises: a lens group, wherein the lens group comprises a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens; a spacer element group, wherein the spacer element group comprises at least a third spacer element located between a third lens and a fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between a fourth lens and a fifth lens and at least partially in contact with the image side surface of the fourth lens; and a lens barrel group, wherein the lens group and the spacer element group are accommodated in the lens barrel group, and the lens barrel group comprises from the object side to the image side of the optical imaging lens The first lens barrel to the fourth lens barrel are arranged in sequence, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; wherein, the effective focal length f4 of the fourth lens and the interval EP34 between the third spacing element and the fourth spacing element along the direction of the optical axis of the optical imaging lens satisfy: -10.62≤f4 / EP34≤-5.20; the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth spacing element, and the inner diameter d4s of the object side surface of the fourth spacing element satisfy: 0.87≤R8 / (D4s-d4s)≤1.65.

[0005] According to another aspect of the present invention, an optical imaging lens is provided, wherein the number of lenses having optical power of the optical imaging lens is eight, and the optical imaging lens comprises: a lens group, wherein the lens group comprises first to eighth lenses arranged in sequence and at intervals from the object side to the image side of the optical imaging lens; a spacer element group, wherein the spacer element group comprises at least a third spacer element located between a third lens and a fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between a fourth lens and a fifth lens and at least partially in contact with the image side surface of the fourth lens; and a lens barrel group, wherein the lens group and the spacer element group are accommodated in the lens barrel group, wherein the lens barrel group comprises first to fourth lens barrels arranged in sequence and at intervals from the object side to the image side of the optical imaging lens, The first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; wherein, the interval EP303 between the object side end face of the third lens barrel and the third spacing element along the direction of the optical axis, and the effective focal length f3 of the third lens satisfy: 7.93≤f3 / EP303≤14.84; the outer diameter D30s of the object side end face of the third lens barrel, the inner diameter d30s of the object side end face of the third lens barrel, the outer diameter D30m of the image side end face of the third lens barrel, and the inner diameter d30m of the image side end face of the third lens barrel satisfy: 2.72≤(D30m-d30m) / (D30s-d30s)≤6.81.

[0006] Further, the effective focal length f1 of the first lens and the distance L10 from the object-side end surface of the first lens barrel to the image-side end surface of the first lens barrel along the direction of the optical axis satisfy: 38.26≤f1 / L10≤53.56.

[0007] Further, the outer diameter D10s of the object side end surface of the first lens barrel, the inner diameter d10s of the object side end surface of the first lens barrel, and the curvature radius R1 of the object side surface of the first lens satisfy: 18.08≤R1 / (D10s-d10s)≤28.09.

[0008] Furthermore, the curvature radius R2 of the image side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D10m of the image side end surface of the first lens barrel satisfy: -19.65≤R2 / (D10m×N1)≤-15.84.

[0009] Furthermore, the inner diameter d20s of the object-side end surface of the second lens barrel and the curvature radius R3 of the object-side surface of the second lens satisfy: -7.87≤R3 / d20s≤-4.50.

[0010] Furthermore, a curvature radius R4 of the image side surface of the second lens and an outer diameter D20m of the image side end surface of the second lens barrel satisfy: -40.09≤R4 / D20m≤-8.75.

[0011] Further, the effective focal length f2 of the second lens and the distance L20 from the object-side end surface of the second lens barrel to the image-side end surface of the second lens barrel along the direction of the optical axis satisfy: -92.03≤f2 / L20≤-78.10.

[0012] Further, the outer diameter D30s of the object side end surface of the third lens barrel, the inner diameter d30s of the object side end surface of the third lens barrel, the outer diameter D30m of the image side end surface of the third lens barrel, and the inner diameter d30m of the image side end surface of the third lens barrel satisfy: 2.72≤(D30m-d30m) / (D30s-d30s)≤6.81.

[0013] Further, a spacing EP303 between the object-side end surface of the third lens barrel and the third spacing element along the optical axis and an effective focal length f3 of the third lens satisfy: 7.93≤f3 / EP303≤14.84.

[0014] Furthermore, a curvature radius R6 of the image-side surface of the third lens and an inner diameter d3s of the object-side surface of the third spacing element satisfy: -4.84≤R6 / d3s≤-4.02.

[0015] Further, an outer diameter D3s of the object side surface of the third spacer element, a curvature radius R5 of the object side surface of the third lens, and a center thickness CT3 of the third lens on the optical axis satisfy: 1.06≤R5×CT3 / D3s≤1.52.

[0016] Further, a center thickness CT4 of the fourth lens on the optical axis and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.25≤T45 / CT4≤1.85.

[0017] Furthermore, the spacer element group also includes a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element satisfy: -1.78≤R13 / d6m≤-1.07.

[0018] Furthermore, the spacer element group also includes a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens, and an inner diameter d7s of the object side surface of the seventh spacer element and a curvature radius R14 of the image side surface of the seventh lens satisfy: 1.12≤R14 / d7s≤2.85.

[0019] Further, the first lens has positive focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is convex, the second lens has negative focal power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex, the third lens has positive focal power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex, the fourth lens has negative focal power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave, the fifth lens has positive focal power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex, the sixth lens has positive focal power, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is convex, the seventh lens has negative focal power, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave, and the image side surface of the eighth lens is concave.

[0020] According to the technical solution of the present invention, the optical imaging lens has eight lenses with optical power, and the optical imaging lens includes a lens group, a spacer element group and a lens barrel group. The lens group includes a first lens to an eighth lens arranged in sequence from the object side to the image side of the optical imaging lens; the spacer element group includes at least a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the lens group and the spacer element group are accommodated in the lens barrel group, and the lens barrel group includes a first lens barrel, a fourth lens barrel and a fifth lens arranged in sequence from the object side to the image side of the optical imaging lens. To the fourth lens barrel, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; wherein, the effective focal length f4 of the fourth lens and the interval EP34 between the third spacing element and the fourth spacing element along the direction of the optical axis of the optical imaging lens satisfy: -10.62≤f4 / EP34≤-5.20; the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth spacing element, and the inner diameter d4s of the object side surface of the fourth spacing element satisfy: 0.87≤R8 / (D4s-d4s)≤1.65.

[0021] The optical imaging lens of the present application uses eight lenses with optical focal length, and the first lens to the eighth lens are arranged in sequence and spaced apart. In particular, the multi-group optical imaging lens of the present application is provided with four lens barrels to divide it into four groups, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel, so as to achieve a significant improvement in the magnification of the optical imaging lens. In the optical imaging lens, the local slope of the surface of the fourth lens is large, that is, the direction of the light will change greatly after passing through the fourth lens, and the edge thickness of the fourth lens also increases with its focal length value, which makes the fourth lens not conducive to processing and easy to be unstable in the optical imaging lens. By limiting f4 / EP34 within a reasonable range, the degree of light deflection of the fourth lens can be effectively controlled to achieve good light control, and at the same time, the edge thickness of the fourth lens is limited to be reasonable for processing and assembly, thereby ensuring the imaging quality of the optical imaging lens. However, at the same time, the extended optical path of the light reflected after passing through the image side surface of the eighth lens will pass through the fourth lens again. The risk of further transmitting stray light on the effective diameter portion of the fourth lens is high, and the generated stray light optical path affects the imaging quality. By limiting R8 / (D4s-d4s), the curvature radius of the image side surface of the fourth lens and the size of the fourth spacing element can be controlled, which can effectively limit the inner diameter size of the fourth spacing element, reduce stray light without affecting light propagation, and at the same time, the reasonable annular width of the fourth spacing element ensures the assembly stability of the fourth lens and the fifth lens, and improves the imaging clarity of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram showing some parameters of an optical imaging lens according to any optional embodiment of the present invention is shown;

[0024] Figure 2 A schematic structural diagram of an optical imaging lens according to a first embodiment of the present invention is shown;

[0025] Figure 3 A schematic structural diagram of an optical imaging lens according to a second embodiment of the present invention is shown;

[0026] Figures 4 to 7 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of the first embodiment are respectively shown;

[0027] Figure 8 A schematic structural diagram of an optical imaging lens according to a third embodiment of the present invention is shown;

[0028] Fig. 9 A schematic structural diagram of an optical imaging lens according to a fourth embodiment of the present invention is shown;

[0029] Figures 10 to 13 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of the third embodiment are respectively shown;

[0030] Fig.14 A schematic structural diagram of an optical imaging lens according to a fifth embodiment of the present invention is shown;

[0031] Fig.15 A schematic structural diagram of an optical imaging lens according to a sixth embodiment of the present invention is shown;

[0032] Figures 16 to 19 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0033] Fig. 20 A schematic structural diagram of an optical imaging lens according to a seventh embodiment of the present invention is shown;

[0034] Fig.21 A schematic structural diagram of an optical imaging lens according to an eighth embodiment of the present invention is shown;

[0035] Figures 22 to 25 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 7 are respectively shown;

[0036] Figure 26 to Figure 27 The stray light path diagram and the stray light energy intensity distribution diagram of the optical imaging lens of an optional embodiment of the present invention are respectively shown under the conditions of f4 / EP34=-5.82 and R8 / (D4s-d4s)=0.87;

[0037] Figure 28 to Figure 29 The stray light path diagram and stray light energy intensity distribution diagram of the optical imaging lens under the conditions of f4 / EP34=-5.82 and R8 / (D4s-d4s)=2.0 in the prior art are shown respectively;

[0038] Figure 30 to Figure 31 The stray light path diagram and the stray light energy intensity distribution diagram of the optical imaging lens in the prior art under the conditions of f4 / EP34=-5.82 and R8 / (D4s-d4s)=0.5 are respectively shown.

[0039] The above drawings include the following reference numerals:

[0040] P10, first lens barrel; P20, second lens barrel; P30, third lens barrel; P40, fourth lens barrel; E1, first lens; E2, second lens; E3, third lens; P3, third spacer; E4, fourth lens; P4, fourth spacer; E5, fifth lens; E6, sixth lens; P6, sixth spacer; E7, seventh lens; P7, seventh spacer; E8, eighth lens; S1, object side of first lens; S2, image side of first lens; S5, image side of second lens object side surface of the second lens; S6, image side surface of the third lens; S12, object side surface of the third lens; S13, image side surface of the third lens; S14, object side surface of the fourth lens; S15, image side surface of the fourth lens; S16, object side surface of the fifth lens; S17, image side surface of the fifth lens; S19, object side surface of the sixth lens; S20, image side surface of the sixth lens; S21, object side surface of the seventh lens; S22, image side surface of the seventh lens; S23, object side surface of the eighth lens; S24, image side surface of the eighth lens. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0043] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0044] It should be noted that in this 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, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0045] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0046] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the eye-side surface, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the display-side surface, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0047] In order to solve the problems of unstable central assembly and serious stray light in the prior art of a multi-group optical imaging lens, the present invention provides an optical imaging lens.

[0048] First embodiment

[0049] like Figures 1 to 27 As shown, the optical imaging lens has eight lenses with optical power, and the optical imaging lens includes a lens group, a spacer element group and a lens barrel group. From the object side to the image side of the optical imaging lens, the lens group includes a first lens to an eighth lens arranged in sequence and spaced apart; the spacer element group includes at least a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the lens group and the spacer element group are accommodated in the lens barrel group, and from the object side to the image side of the optical imaging lens, the lens barrel group includes a first lens barrel to a fourth lens barrel arranged in sequence and spaced apart. The first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; wherein, the effective focal length f4 of the fourth lens and the interval EP34 between the third spacing element and the fourth spacing element along the direction of the optical axis of the optical imaging lens satisfy: -10.62≤f4 / EP34≤-5.20; the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth spacing element, and the inner diameter d4s of the object side surface of the fourth spacing element satisfy: 0.87≤R8 / (D4s-d4s)≤1.65.

[0050] The optical imaging lens of the present application uses eight lenses with optical focal length, and the first lens to the eighth lens are arranged in sequence and spaced apart. In particular, the multi-group optical imaging lens of the present application is provided with four lens barrels to divide it into four groups, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel, so as to achieve a significant improvement in the magnification of the optical imaging lens. In the optical imaging lens, the local slope of the surface of the fourth lens is large, that is, the direction of the light will change greatly after passing through the fourth lens, and the edge thickness of the fourth lens also increases with its focal length value, which makes the fourth lens not conducive to processing and easy to be unstable in the optical imaging lens. By limiting f4 / EP34 within a reasonable range, the degree of light deflection of the fourth lens can be effectively controlled to achieve good light control, and at the same time, the edge thickness of the fourth lens is limited to be reasonable for processing and assembly, thereby ensuring the imaging quality of the optical imaging lens. However, at the same time, the extended optical path of the light reflected after passing through the image side surface of the eighth lens will pass through the fourth lens again. The risk of further transmitting stray light on the effective diameter portion of the fourth lens is high, and the generated stray light optical path affects the imaging quality. By limiting R8 / (D4s-d4s), the curvature radius of the image side surface of the fourth lens and the size of the fourth spacing element can be controlled, which can effectively limit the inner diameter size of the fourth spacing element, reduce stray light without affecting light propagation, and at the same time, the reasonable annular width of the fourth spacing element ensures the assembly stability of the fourth lens and the fifth lens, and improves the imaging clarity of the optical imaging lens.

[0051] Table 1 below shows the stray light distribution of the optical imaging lens of the optional embodiment scheme 1 of the present application and schemes 2 and 3 in the prior art under the condition of f4 / EP34=-5.82 with different values ​​of R8 / (D4s-d4s). In the stray light energy intensity distribution diagram, the X and Y axes represent the spatial position of the imaging surface, showing the energy distribution peak position of the stray light corresponding to the imaging surface, and the color depth represents the intensity of the stray light energy, that is, the luminous flux of the stray light per square millimeter on the imaging surface (unit: FLUX / sq-MM).

[0052] Table 1

[0053] Program No. 1 2 3 f4 / EP34 -5.82 -5.82 -5.82 R8 / (D4s-d4s) 0.87 2.0 0.5 Stray light path diagram Attached Fig.26 Attached Fig.28 Attached Fig.30 Stray light energy intensity distribution Attached Fig. 27 Attached Fig.29 Attached Fig.31

[0054] The optical imaging lenses shown in Scheme 2 and Scheme 3 belong to the prior art. When Scheme 2 is f4 / EP34=-5.82 and R8 / (D4s-d4s)=2.0, the light distribution is as follows: Fig.28 and Fig.29As shown in the figure, when the value of R8 / (D4s-d4s) is too large, the maximum energy intensity of the stray light on the imaging surface of the optical imaging lens can reach 1.2E-6 (FLUX / sq-MM), the stray light energy is high, and the imaging clarity is low. When scheme 3 is f4 / EP34=-5.82, R8 / (D4s-d4s)=0.5, the light distribution is as follows Fig.30 and Fig.31 As shown in FIG. 1 , when the value of R8 / (D4s-d4s) is too small, the maximum energy intensity of the stray light on the imaging surface of the optical imaging lens is as high as 1.4E-6 (FLUX / sq-MM), which seriously affects the imaging quality.

[0055] The optical imaging lens shown in Scheme 1 belongs to an embodiment of the present application. When Scheme 1 is f4 / EP34=-5.82 and R8 / (D4s-d4s)=0.87, the distribution of stray light is as follows: Fig.26 and Fig. 27 As shown, the optical imaging lens of the present application has clear imaging, reduced aberration, and significantly reduced stray light energy.

[0056] In this embodiment, the effective focal length f1 of the first lens and the distance L10 from the object side end face of the first lens barrel to the image side end face of the first lens barrel along the direction of the optical axis satisfy: 38.26≤f1 / L10≤53.56. If the value of f1 / L10 is too large, the effective focal length of the first lens is too large, the light converges excessively, and the aberration is serious. If the value of f1 / L10 is too small, it is not conducive to convergence of light, and the imaging quality of the optical imaging lens is reduced. By limiting f1 / L10 within a reasonable range, the effective focal length of the first lens and the distance from the object side end face of the first lens barrel to the image side end face of the first lens barrel along the direction of the optical axis can be reasonably configured, and the effective focal length of the first lens can be constrained to ensure that the imaging capability of the optical imaging lens is high. At the same time, the distance from the object side end face of the first lens barrel to the image side end face of the first lens barrel along the direction of the optical axis can be limited, which is conducive to the overall thinning of the optical imaging lens and the miniaturization of the optical imaging lens.

[0057] In this embodiment, the outer diameter D10s of the object side end surface of the first lens barrel, the inner diameter d10s of the object side end surface of the first lens barrel, and the curvature radius R1 of the object side surface of the first lens satisfy the following conditions: 18.08≤R1 / (D10s-d10s)≤28.09. If the value of R1 / (D10s-d10s) is too large, it is easy to cause the ratio of the curvature radius of the object side surface of the first lens to the difference between the inner and outer diameters of the object side end surface of the first lens barrel to be too large, causing the first lens barrel to be unstable during assembly, thereby reducing the assembly yield of the optical imaging lens. If the value of R1 / (D10s-d10s) is too small, the focusing ability of the first lens is weakened, resulting in a decrease in imaging quality. By limiting R1 / (D10s-d10s) within a reasonable range, the assembly support width of the first lens barrel can be limited, which is beneficial to improving the stability of the optical imaging lens during assembly, improving the assembly yield of the optical imaging lens, and further improving the performance of the optical imaging lens. At the same time, by limiting the curvature radius of the object side surface of the first lens and the ratio of the difference between the inner and outer diameters of the object side end surface of the first lens barrel, the light focusing ability of the first lens can be increased, thereby maintaining good imaging of the optical imaging lens.

[0058] In this embodiment, the radius of curvature R2 of the image side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D10m of the image side end surface of the first lens barrel satisfy: -19.65≤R2 / (D10m×N1)≤-15.84. If the value of R2 / (D10m×N1) is too large, the outer diameter of the image side end surface of the first lens barrel is too large, which increases the risk of stray light reflected from the imaging surface and affects the imaging clarity. If the value of R2 / (D10m×N1) is too small, the refractive index of the first lens is limited to a lower level, the degree of light refraction is weakened, the focusing effect is affected, and the imaging quality is reduced. By limiting R2 / (D10m×N1) within a reasonable range, the refractive index of the first lens can be ensured to be moderate, thereby ensuring that the degree of light refraction achieves a good focusing effect. At the same time, limiting the outer diameter range of the image side end surface of the first lens barrel helps to control the outer diameter size of the first lens, ensure the processability of the first lens, and ultimately ensure the imaging quality of the optical imaging lens.

[0059] In this embodiment, the inner diameter d20s of the object side end face of the second lens barrel and the curvature radius R3 of the object side face of the second lens satisfy: -7.87≤R3 / d20s≤-4.50. If the value of R3 / d20s is too large, the inner diameter of the object side end face of the second lens barrel is too large, thereby affecting the size of the second lens barrel, which is not conducive to the miniaturization of the optical imaging lens and the size integration with the module end. If the value of R3 / d20s is too small, the inner diameter of the object side end face of the second lens barrel is too small, thereby affecting the effective propagation of light and causing the image quality to deteriorate. By limiting R3 / d20s within a reasonable range, it can be ensured that the effective light size entering the object side face of the second lens and the inner diameter of the object side end face of the second lens barrel are maintained at a suitable ratio, which is conducive to controlling the inner diameter of the object side end face of the second lens barrel, thereby indirectly ensuring the outer diameter of the object side end face of the second lens barrel, which is conducive to the miniaturization of the optical imaging lens, and at the same time, it can ensure the effective propagation of light and achieve the high performance of the optical imaging lens.

[0060] In this embodiment, the curvature radius R4 of the image side surface of the second lens and the outer diameter D20m of the image side end surface of the second lens barrel satisfy: -40.09≤R4 / D20m≤-8.75. If the value of R4 / D20m is too large, the lower limit of the image side outer diameter of the second lens barrel is limited, resulting in an increased risk of stray light reflected from the imaging surface, affecting the imaging quality. If the value of R4 / D20m is too small, the upper limit of the outer diameter of the image side end surface of the second lens barrel is limited, the risk of stray light increases, and the imaging quality is also affected. By controlling R4 / D20m within a reasonable range, the upper and lower limits of the outer diameter of the image side end surface of the second lens barrel can be effectively controlled, avoiding the second lens from reflecting light to the rear end of the optical imaging lens to generate stray light, thereby ensuring the imaging quality of the optical imaging lens.

[0061] In this embodiment, the effective focal length f2 of the second lens and the distance L20 from the object side end face of the second lens barrel to the image side end face of the second lens barrel along the direction of the optical axis satisfy: -92.03≤f2 / L20≤-78.10. If the value of f2 / L20 is too large, the distance from the object side end face of the second lens barrel to the image side end face of the second lens barrel along the direction of the optical axis is too large, which increases the weight of the optical imaging lens and is not conducive to the lightweight design of the optical imaging lens. If the value of f2 / L20 is too small, the light propagation distance is too short, the light deflection distance control is unreasonable, which affects the light reception of the subsequent lens, and ultimately leads to a decrease in imaging quality. By limiting f2 / L20 within a reasonable range, the distance from the object side end face of the second lens barrel to the image side end face of the second lens barrel along the direction of the optical axis can be effectively controlled to ensure that the light propagation distance is within a reasonable range, and the balance between lightweight and high-performance imaging of the optical imaging lens is achieved.

[0062] In this embodiment, the outer diameter D30s of the object side end surface of the third lens barrel, the inner diameter d30s of the object side end surface of the third lens barrel, the outer diameter D30m of the image side end surface of the third lens barrel, and the inner diameter d30m of the image side end surface of the third lens barrel satisfy the following relationship: 2.72≤(D30m-d30m) / (D30s-d30s)≤6.81. If the value of (D30m-d30m) / (D30s-d30s) is too large, the ratio of the inner and outer diameter difference of the object side end surface of the third lens barrel to the inner and outer diameter difference of the image side end surface of the third lens barrel is too large, resulting in an unreasonable ratio of the object side end surface filling area and the image side end surface filling area of ​​the third lens barrel, which affects the processability and assembly performance of the third lens barrel. If the value of (D30m-d30m) / (D30s-d30s) is too small, the ratio of the inner and outer diameter difference of the object side end face of the third lens barrel to the inner and outer diameter difference of the image side end face of the third lens barrel is too small, resulting in unreasonable size design of the object side end face and the image side end face of the third lens barrel, a large assembly step difference of the optical imaging lens, and reduced processability of the third lens barrel. By limiting (D30m-d30m) / (D30s-d30s) within a reasonable range, the rationality of the ratio of the inner and outer diameter difference of the object side end face of the third lens barrel to the inner and outer diameter difference of the image side end face of the third lens barrel can be ensured, while ensuring that the assembly step difference of the optical imaging lens is set reasonably, and optimizing the processability and assembly performance of the third lens barrel.

[0063] In this embodiment, the interval EP303 between the object side end face of the third lens barrel and the third spacing element along the optical axis and the effective focal length f3 of the third lens satisfy: 7.93≤f3 / EP303≤14.84. If the value of f3 / EP303 is too large, the interval between the object side end face of the third lens barrel and the third spacing element along the optical axis is too small, which affects the molding stability of the third lens barrel and increases the difficulty of assembly. If the value of f3 / EP303 is too small, the distance required for the third lens to converge light is too long, the light deflection distance is not reasonably controlled, and the light reception of the subsequent lens is affected, which ultimately leads to a decrease in imaging quality. By limiting f3 / EP303 within a reasonable range, it is possible to ensure that the center thickness of the third lens on the optical axis and the interval between the object-side end surface of the third lens barrel and the third spacing element maintain an appropriate ratio, thereby controlling the light-gathering ability of the third lens while avoiding excessive blocking or reflection of light by the third spacing element, ensuring that light smoothly transitions from the third lens barrel to the third spacing element and then to subsequent lenses, achieving a good light convergence effect, and also reducing stray light, maintaining the high definition and imaging quality of the optical imaging lens.

[0064] In this embodiment, the curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer element satisfy: -4.84≤R6 / d3s≤-4.02. If the value of R6 / d3s is too large, the ratio of the curvature radius of the image side surface of the third lens to the inner diameter of the object side surface of the third spacer element is too large, and the risk of reflection when the light enters the object side surface of the fourth lens increases, which ultimately affects the imaging quality. If the value of R6 / d3s is too small, the ratio of the curvature radius of the image side surface of the third lens to the inner diameter of the object side surface of the third spacer element is too small, resulting in a reduction in the size of the effective light when the light enters the object side surface of the fourth lens, affecting the effective transmission of the light and causing a decrease in imaging quality. By controlling R6 / d3s within a reasonable range, it can be ensured that the curvature radius of the image side surface of the third lens and the inner diameter of the object side surface of the third spacer element maintain an appropriate ratio, so that the light can pass through the third spacer element smoothly after converging through the third lens, avoiding stray light at the edge of the third spacer element. In addition, constraining R6 / d3s helps maintain a smooth light trajectory, ensuring that the light enters the next lens with an appropriate divergence trend, avoiding premature or over-focusing of the light, thereby optimizing the imaging performance of the optical imaging lens.

[0065] In this embodiment, the outer diameter D3s of the object side surface of the third spacer element, the radius of curvature R5 of the object side surface of the third lens, and the center thickness CT3 of the third lens on the optical axis satisfy the following relationship: 1.06≤R5×CT3 / D3s≤1.52. If the value of R5×CT3 / D3s is too large, the radius of curvature of the object side surface of the third lens and the center thickness of the third lens on the optical axis exceed the reasonable range, resulting in excessive changes in the degree of light refraction, increasing the risk of stray light and affecting the imaging quality. If the value of R5×CT3 / D3s is too small, the radius of curvature of the object side surface of the third lens and the center thickness of the third lens on the optical axis are too small, and the degree of light refraction is insufficient, resulting in a decrease in the light focusing ability of the third lens and affecting the imaging quality. By controlling R5×CT3 / D3s within a reasonable range, the shape and center thickness of the object side of the third lens and the outer diameter of the object side of the third spacer element can be kept in a reasonable proportional relationship, which can optimize the light-gathering ability of the third lens and the stray light blocking effect of the third spacer element, while ensuring that the third spacer element has a reasonable annular width, and ensuring that the third lens and the third spacer element are stable. In addition, constraining R5×CT3 / D3s also reduces the reflection loss of light at the third spacer element and its edges, achieving more efficient light transmission and better imaging results.

[0066] In this embodiment, the center thickness CT4 of the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.25≤T45 / CT4≤1.85. If the value of T45 / CT4 is too large, the air interval between the fourth lens and the fifth lens on the optical axis is too large, which will increase the cost of the optical imaging lens, affect the stability of the optical imaging lens, increase the risk of failure in the drop test, and affect the reliability of the optical imaging lens. If the value of T45 / CT4 is too small, the air interval between the fourth lens and the fifth lens on the optical axis is too small, resulting in lens contact in the finished optical imaging lens during the drop test, increasing the risk of internal damage to the optical imaging lens and shortening the service life of the optical imaging lens. By controlling T45 / CT4 within a reasonable range, it can be ensured that the air interval between the fourth lens and the fifth lens on the optical axis is moderate, which not only reduces the material cost, but also ensures the anti-seismic performance of the optical imaging lens, and achieves a balance between low cost and high performance. In addition, constrained T45 / CT4 can also optimize the transmission path of light between the fourth lens and the fifth lens, reduce the scattering and reflection of light in the air gap, and improve the working efficiency and imaging quality of the entire optical system.

[0067] In this embodiment, the spacer element group also includes a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element satisfy: -1.78≤R13 / d6m≤-1.07. If the value of R13 / d6m is too large, the ratio of the curvature radius of the object side surface of the seventh lens to the inner diameter of the image side surface of the sixth spacer element is too large, resulting in an increased risk of stray light during the transmission process between the sixth spacer element and the seventh lens, affecting the imaging quality. If the value of R13 / d6m is too small, the ratio of the curvature radius of the object side surface of the seventh lens to the inner diameter of the image side surface of the sixth spacer element is too small, resulting in a reduction in the size of the effective path light when the light is transmitted between the sixth spacer element and the seventh lens, affecting the effective convergence and transmission of light, resulting in a decrease in imaging quality. By controlling R13 / d6m within a reasonable range, the light entering the seventh lens from the image side of the sixth spacing element is all effective path light, reducing the risk of stray light in the non-effective path part, avoiding reflection or divergence of light when passing through the sixth spacing element, maintaining the focusing characteristics of the light, and thus reducing excess light entering the seventh lens, indirectly reducing the risk of stray light caused by redundant light entering the eighth lens, and achieving high-quality imaging effects.

[0068] In this embodiment, the spacer element group also includes a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens, and the inner diameter d7s of the object side surface of the seventh spacer element and the curvature radius R14 of the image side surface of the seventh lens satisfy: 1.12≤R14 / d7s≤2.85. If the value of R14 / d7s is too large, the ratio of the curvature radius of the image side surface of the seventh lens to the inner diameter of the object side surface of the seventh spacer element is too large, resulting in the shape of the seventh lens not meeting the lens processing specification, affecting the processability and assembly performance of the lens. If the value of R14 / d7s is too small, the ratio of the curvature radius of the image side surface of the seventh lens to the inner diameter of the object side surface of the seventh spacer element is too small, resulting in the inner diameter size of the object side surface of the seventh spacer element not meeting the effective light size limit, affecting the effective propagation of light, thereby affecting the imaging quality. By controlling R14 / d7s within a reasonable range, it can be ensured that the shape of the seventh lens meets the lens processing specifications, while ensuring that the inner diameter of the object side of the seventh spacer element meets the effective light size limit, thereby optimizing the lens processability and effectively propagating light, and maintaining imaging quality.

[0069] Optionally, the optical imaging lens in the embodiments of the present application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. Optionally, the optical imaging lens can be simulated by CODEV software. In the process of simulation using the above software and / or tools, the surface shape of each lens can be appropriately adjusted according to the surface shape of the software and / or tool used.

[0070] In this embodiment, each lens can be selected as a trimmed lens. The outer diameter surface of the trimmed lens has a trimmed structure and a non-trimmed structure, and the outer diameter of the trimmed structure is smaller than the outer diameter of the non-trimmed structure. The outer diameter of the trimmed lens usually refers to the outer diameter of the non-trimmed structure.

[0071] In this embodiment, each spacer element can be selected as a trimming spacer element. The outer annular surface of the trimming spacer element has a trimming portion and a non-trimming portion, and the outer diameter of the trimming portion is smaller than the outer diameter of the non-trimming portion. The outer diameter of the trimming spacer element usually refers to the maximum outer diameter of the non-trimming portion.

[0072] Second embodiment

[0073] like Figures 1 to 27As shown, the optical imaging lens has eight lenses with optical power, and the optical imaging lens includes a lens group, a spacer element group and a lens barrel group. From the object side to the image side of the optical imaging lens, the lens group includes a first lens to an eighth lens arranged in sequence and spaced apart; the spacer element group includes at least a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the lens group and the spacer element group are accommodated in the lens barrel group. From the object side to the image side of the optical imaging lens, the lens barrel group includes a first lens barrel to a fourth lens barrel arranged in sequence and spaced apart, and the first lens is accommodated in the first lens barrel. The second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; wherein, the interval EP303 between the object side end face of the third lens barrel and the third spacing element along the direction of the optical axis and the effective focal length f3 of the third lens satisfy: 7.93≤f3 / EP303≤14.84; the outer diameter D30s of the object side end face of the third lens barrel, the inner diameter d30s of the object side end face of the third lens barrel, the outer diameter D30m of the image side end face of the third lens barrel, and the inner diameter d30m of the image side end face of the third lens barrel satisfy: 2.72≤(D30m-d30m) / (D30s-d30s)≤6.81.

[0074] The optical imaging lens of the present application uses eight lenses with optical power, and the first lens to the eighth lens are arranged in sequence and spaced apart. In particular, the multi-group optical imaging lens of the present application is provided with four lens barrels to divide it into four groups, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel, so as to achieve a significant improvement in the magnification of the optical imaging lens. In the optical imaging lens, by limiting f3 / EP303 within a reasonable range, a good light convergence effect is achieved while ensuring the processability of the front end of the third lens barrel. However, at this time, the wall thickness of the front end of the third lens barrel is relatively small and the opening is relatively large, which is not conducive to the assembly stability of the internal products of the third lens barrel. By limiting (D30m-d30m) / (D30s-d30s) within a reasonable range, the rationality of the ratio of the inner and outer diameter difference of the object side end surface of the third lens barrel to the inner and outer diameter difference of the image side end surface of the third lens barrel can be ensured, while ensuring that the assembly step difference of the optical imaging lens is set reasonably, and optimizing the processability and assembly performance of the third lens barrel. In addition, limiting (D30m-d30m) / (D30s-d30s) can also optimize the propagation path of light inside the third lens barrel, ensure the effective convergence of light, reduce the reflection loss of light on the lens barrel wall, avoid the generation of stray light, thereby improving the light receiving effect of subsequent lenses, and ultimately improving the imaging quality.

[0075] It should be noted that this embodiment also includes other conditional expressions in the above embodiment, which will not be described one by one here.

[0076] Optionally, the optical imaging lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0077] The optical imaging lens in the present application may use multiple lenses, such as the eight lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0078] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although 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 may also include other numbers of lenses.

[0079] Figure 1 A schematic diagram of the dimensions of an optical imaging lens of the present application is shown. Figure 1 Parameters such as d3s, D4s, and EP34 are marked in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical imaging lens and the surface shape of the specific lens, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[0080] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0081] It should be noted that any one of the following embodiments 1 to 8 is applicable to all embodiments of the present application.

[0082] Embodiment 1

[0083] like Figure 2 As shown, the optical imaging lens of the first embodiment of the present application is described. Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 is shown.

[0084] like Figure 2As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, a seventh spacer P7, and an eighth lens E8. The first lens E1 is accommodated in the first lens barrel P10, the second lens E2 is accommodated in the second lens barrel P20, the third lens E3 to the fifth lens E5 are accommodated in the third lens barrel P30, and the sixth lens E6 to the eighth lens E8 are accommodated in the fourth lens barrel P40.

[0085] In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S5 of the second lens is concave, and the image side surface S6 of the second lens is convex. The third lens E3 has positive focal power, the object side surface S12 of the third lens is convex, and the image side surface S13 of the third lens is convex. The fourth lens E4 has negative focal power, the object side surface S14 of the fourth lens is convex, and the image side surface S15 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S16 of the fifth lens is convex, and the image side surface S17 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S19 of the sixth lens is concave, and the image side surface S20 of the sixth lens is convex. The seventh lens E7 has negative focal power, the object side surface S21 of the seventh lens is concave, and the image side surface S22 of the seventh lens is concave. The eighth lens E8 has positive refractive power, the object-side surface S23 of the eighth lens is a convex surface, and the image-side surface S24 of the eighth lens is a concave surface.

[0086] Table 2 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the curvature radius, thickness / distance, effective radius and focal length are all millimeters (mm).

[0087] Table 2

[0088]

[0089]

[0090] In Embodiment 1, the object side surface and the image side surface of any lens from the first lens E1 to the eighth lens E8 are both aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0091]

[0092] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the direction of the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 2 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 3 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspheric mirror surface in Example 1.

[0093] Table 3 shows the coefficients of the higher order terms that can be used for each aspheric mirror surface in the embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above embodiment 1. In this embodiment, the object side surface and the image side surface of the first lens to the eighth lens are all aspheric surfaces.

[0094] Table 3

[0095]

[0096]

[0097] Figure 4 The axial chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 5 The astigmatism curve of the optical imaging lens of the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 7 The chromatic aberration curve of the optical imaging lens of the first embodiment is shown, which indicates the degree to which the focusing points of light rays of different wavelengths do not completely overlap.

[0098] according to Figures 4 to 7 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0099] Embodiment 2

[0100] like Figure 3 As shown, the optical imaging lens of the second embodiment of the present application is described, which is different from the first embodiment in that the distances and thicknesses between the spacer elements, lenses, lens barrels, etc. are different.

[0101] Figure 3The schematic diagram of the structure of the optical imaging lens of the second embodiment is shown. For the sake of brevity, some descriptions similar to those of the first embodiment are omitted. In this embodiment, the third lens and the fourth lens are buckled together, the length of the structural part of the fourth lens is relatively large, and the difference between the inner and outer diameters of the fourth spacing element supported by the third lens is increased, that is, the width of the annular band of the fourth spacing element is increased, which is conducive to improving the support stability while intercepting the stray light brought by the rear end group.

[0102] Embodiment 3

[0103] like Figure 8 As shown, the optical imaging lens of the third embodiment of the present application is described. Figure 8 A schematic structural diagram of an optical imaging lens according to a third embodiment is shown.

[0104] like Figure 8 As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, a seventh spacer P7, and an eighth lens E8. The first lens E1 is accommodated in the first lens barrel P10, the second lens E2 is accommodated in the second lens barrel P20, the third lens E3 to the fifth lens E5 are accommodated in the third lens barrel P30, and the sixth lens E6 to the eighth lens E8 are accommodated in the fourth lens barrel P40.

[0105] In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S5 of the second lens is concave, and the image side surface S6 of the second lens is convex. The third lens E3 has positive focal power, the object side surface S12 of the third lens is convex, and the image side surface S13 of the third lens is convex. The fourth lens E4 has negative focal power, the object side surface S14 of the fourth lens is convex, and the image side surface S15 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S16 of the fifth lens is convex, and the image side surface S17 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S19 of the sixth lens is concave, and the image side surface S20 of the sixth lens is convex. The seventh lens E7 has negative focal power, the object side surface S21 of the seventh lens is concave, and the image side surface S22 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object-side surface S23 of the eighth lens is a convex surface, and the image-side surface S24 of the eighth lens is a concave surface.

[0106] Table 4 shows the basic structural parameters of the optical imaging lens of Example 3, wherein the units of the curvature radius, thickness / distance, effective radius and focal length are all millimeters (mm).

[0107] Table 4

[0108] Face number Surface type Radius of curvature thickness Refractive Index Abbe number Cone coefficient OBJ Spherical endless endless S1 Aspheric 27.2426 0.9368 1.55 56.1 0.0000 S2 Aspheric -311.9797 2.2312 0.0000 S3 Spherical endless 4.8000 S4 Spherical endless 1.9854 S5 Aspheric -34.8681 0.5700 1.67 20.4 0.0000 S6 Aspheric -77.9136 0.8806 97.6491 S7 Spherical endless 0.0000 S8 Spherical endless -5.8960 S9 Spherical endless 5.8960 S10 Spherical endless 0.6500 S11 Spherical endless -0.3587 S12 Aspheric 9.6310 1.1052 1.55 56.1 1.7681 S13 Aspheric -27.5067 0.2049 0.0000 S14 Aspheric 5.0213 0.5930 1.64 23.5 -2.3483 S15 / STO Aspheric 2.9520 1.0967 -1.0504 S16 Aspheric 21.3922 1.2740 1.55 56.1 13.9484 S17 Aspheric -8.4222 1.5100 1.5974 S18 Spherical endless 0.0133 S19 Aspheric -7.2835 1.2000 1.67 20.4 0.0000 S20 Aspheric -4.9159 0.1621 0.6781 S21 Aspheric -8.1088 0.7474 1.55 56.1 3.9422 S22 Aspheric 15.3332 0.4991 11.4349 S23 Aspheric 10.1554 1.1008 1.55 56.1 -41.9770 S24 Aspheric 7.2996 6.2866 2.5523 S25 Spherical endless -0.0133 S26 Spherical endless 0.2100 1.52 64.2 S27 Spherical endless 1.5274 S28 Spherical endless

[0109] Table 5 shows the high-order coefficients that can be used for each aspherical mirror surface in the embodiment, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. In this embodiment, the object side surface and the image side surface of the first lens to the eighth lens are all aspherical surfaces.

[0110] Table 5

[0111] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.2968E-02 1.7008E-02 3.6592E-03 5.5743E-04 1.0376E-04 -4.3661E-07 1.6590E-05 S2 5.7181E-02 1.6931E-02 3.6218E-03 4.8759E-04 1.3588E-04 -6.7562E-06 3.2701E-05 S5 8.4114E-02 -1.0710E-03 -1.8808E-03 -3.8747E-05 -6.5233E-05 5.4150E-05 2.5389E-05 S6 9.0501E-02 -1.1299E-03 -1.6654E-03 -7.8534E-05 -4.6308E-05 5.2151E-05 2.4524E-05 S12 3.8011E-02 -2.9656E-02 1.1749E-03 -2.3293E-04 2.0637E-04 1.1147E-04 1.5626E-04 S13 1.5342E-01 -5.4749E-02 1.2889E-02 -3.5945E-03 1.1688E-03 -2.9754E-04 7.0374E-04 S14 -5.0420E-01 3.0412E-02 7.6250E-03 -2.6958E-03 7.5116E-04 -1.7075E-04 2.0754E-04 S15 -5.5305E-01 4.5661E-02 -2.7419E-03 1.2996E-03 -2.8191E-05 3.7317E-04 1.1150E-04 S16 -4.2129E-02 -1.4781E-02 3.4293E-04 1.5640E-03 5.6718E-04 2.1835E-04 3.0402E-05 S17 7.4464E-04 -6.0827E-03 -5.7642E-04 3.9786E-04 2.6328E-04 7.2894E-05 4.7205E-05 S19 3.3048E-01 -2.4333E-02 1.9819E-03 -1.2992E-03 3.9905E-04 -1.7295E-04 1.3266E-04 S20 3.7704E-01 -8.1433E-04 1.7861E-03 -4.5832E-03 2.4818E-03 -1.1643E-03 1.0785E-03 S21 -1.4398E-01 1.1592E-01 -1.7059E-02 -7.7256E-04 2.3532E-03 -1.4851E-03 1.3179E-03 S22 -5.7960E-01 1.3027E-01 -2.5567E-02 6.2897E-03 -7.1294E-04 3.6151E-04 4.8720E-05 S23 -8.3843E-01 3.7906E-02 -1.0738E-02 1.7945E-03 -1.3360E-04 3.6377E-04 -3.4670E-05 S24 -1.0366E+00 5.5779E-02 -1.1726E-02 1.3284E-03 -3.4114E-04 1.0560E-04 -7.0282E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3896E-06 6.9618E-06 -3.4116E-06 9.8154E-06 -6.4962E-06 0.0000E+00 0.0000E+00 S2 -1.9028E-06 1.0792E-05 -3.7600E-06 9.2404E-06 -9.8863E-06 1.1469E-06 0.0000E+00 S5 3.4996E-05 8.9280E-06 1.5404E-05 5.6933E-06 9.3865E-06 0.0000E+00 0.0000E+00 S6 3.1611E-05 1.4230E-05 1.8537E-05 -1.1741E-06 9.1734E-06 0.0000E+00 0.0000E+00 S12 -1.1086E-04 -2.6934E-05 2.3372E-05 -1.2363E-05 4.6225E-06 0.0000E+00 0.0000E+00 S13 -6.0838E-04 2.0402E-04 -4.6486E-05 1.6360E-05 -1.2489E-05 7.6548E-06 -1.6601E-06 S14 -8.6939E-04 4.6721E-04 -5.5991E-05 8.6734E-06 -1.3859E-05 1.1088E-05 -4.6097E-06 S15 -4.1181E-04 1.1701E-04 -6.8019E-06 6.2606E-06 -3.2774E-06 1.3854E-06 -1.9351E-07 S16 -1.8043E-04 -2.7867E-05 6.8906E-06 1.2570E-05 0.0000E+00 0.0000E+00 0.0000E+00 S17 -5.5664E-05 -6.6873E-06 -4.0874E-06 3.9487E-06 4.5145E-07 0.0000E+00 0.0000E+00 S19 -5.7281E-05 4.5562E-05 -1.1697E-05 7.1359E-06 -3.9386E-06 6.0513E-07 0.0000E+00 S20 -5.2077E-04 3.5049E-04 -1.5476E-04 6.3650E-05 -5.6106E-05 1.8275E-05 1.4834E-06 S21 -7.3311E-04 4.7098E-04 -2.3649E-04 9.2907E-05 -7.6769E-05 3.0502E-05 0.0000E+00 S22 -9.0869E-05 3.7441E-05 -5.6049E-05 2.6432E-06 -2.5068E-05 0.0000E+00 0.0000E+00 S23 4.3877E-05 -5.0082E-06 -3.9957E-06 -1.4899E-06 -4.9556E-06 -2.5663E-06 7.9308E-07 S24 3.8309E-05 -1.9484E-05 4.7808E-06 -3.3141E-06 1.4703E-06 0.0000E+00 0.0000E+00

[0112] Fig.10 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.11 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.13 The chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the degree to which the focusing points of light rays of different wavelengths do not completely overlap.

[0113] according to Figures 10 to 13 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0114] Embodiment 4

[0115] like Fig. 9 As shown, the optical imaging lens of the fourth embodiment of the present application is described, which is different from the third embodiment in that the distances and thicknesses between the various spacing elements, lenses, lens barrels, etc. are different.

[0116] Fig. 9 The structure diagram of the optical imaging lens of the fourth embodiment is shown. For the sake of brevity, some descriptions similar to those of the third embodiment are omitted. In this embodiment, the thickness of the structural part of the fourth lens is increased, which is conducive to ensuring the stability of the assembly while intercepting the stray light brought by the rear end group. In addition, in the fourth lens barrel, the sixth lens and the seventh lens are buckled and arranged to restrain each other to improve the assembly stability of the optical imaging lens.

[0117] Embodiment 5

[0118] like Fig.14 As shown, the optical imaging lens of the fifth embodiment of the present application is described. Fig.14 A schematic structural diagram of an optical imaging lens according to a fifth embodiment is shown.

[0119] like Fig.14As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, a seventh spacer P7, and an eighth lens E8. The first lens E1 is accommodated in the first lens barrel P10, the second lens E2 is accommodated in the second lens barrel P20, the third lens E3 to the fifth lens E5 are accommodated in the third lens barrel P30, and the sixth lens E6 to the eighth lens E8 are accommodated in the fourth lens barrel P40.

[0120] In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S5 of the second lens is concave, and the image side surface S6 of the second lens is convex. The third lens E3 has positive focal power, the object side surface S12 of the third lens is convex, and the image side surface S13 of the third lens is convex. The fourth lens E4 has negative focal power, the object side surface S14 of the fourth lens is convex, and the image side surface S15 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S16 of the fifth lens is convex, and the image side surface S17 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S19 of the sixth lens is concave, and the image side surface S20 of the sixth lens is convex. The seventh lens E7 has negative focal power, the object side surface S21 of the seventh lens is concave, and the image side surface S22 of the seventh lens is concave. The eighth lens E8 has negative refractive power, the object-side surface S23 of the eighth lens is a convex surface, and the image-side surface S24 of the eighth lens is a concave surface.

[0121] Table 6 shows the basic structural parameters of the optical imaging lens of Example 5, wherein the units of the curvature radius, thickness / distance, effective radius and focal length are all millimeters (mm).

[0122] Table 6

[0123]

[0124]

[0125] Table 7 shows the coefficients of the higher order terms that can be used for each aspheric mirror surface in the embodiment, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above embodiment 1. In this embodiment, the object side surface and the image side surface of the first lens to the eighth lens are all aspheric surfaces.

[0126] Table 7

[0127]

[0128]

[0129] Fig.16 The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.17 The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.18 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.19 The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the degree to which the focusing points of light of different wavelengths do not completely overlap.

[0130] according to Figures 16 to 19 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0131] Embodiment 6

[0132] like Fig.15 As shown, the optical imaging lens of the sixth embodiment of the present application is described, which differs from the fifth embodiment in that the distances and thicknesses between the various spacing elements, lenses, lens barrels, etc. are different.

[0133] Fig.15 The structure diagram of the optical imaging lens of Example 6 is shown. For the sake of brevity, some descriptions similar to those of Example 5 are omitted. In this embodiment, the length of the structure part from the third lens to the fifth lens is shortened, which is conducive to the miniaturization of the optical imaging lens.

[0134] Embodiment 7

[0135] like Fig. 20 As shown, the optical imaging lens of the seventh embodiment of the present application is described. Fig. 20 A schematic structural diagram of an optical imaging lens according to a seventh embodiment is shown.

[0136] like Fig. 20As shown, the optical imaging lens includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, a seventh spacer element P7, and an eighth lens E8. Among them, the first lens E1 is accommodated in the first lens barrel P10, the second lens E2 is accommodated in the second lens barrel P20, the third lens E3 to the fifth lens E5 are accommodated in the third lens barrel P30, and the sixth lens E6 to the eighth lens E8 are accommodated in the fourth lens barrel P40. In this embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has negative focal power, the object side surface S5 of the second lens is concave, and the image side surface S6 of the second lens is convex. The third lens E3 has positive focal power, the object side surface S12 of the third lens is convex, and the image side surface S13 of the third lens is convex. The fourth lens E4 has negative focal power, the object side surface S14 of the fourth lens is convex, and the image side surface S15 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S16 of the fifth lens is convex, and the image side surface S17 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S19 of the sixth lens is concave, and the image side surface S20 of the sixth lens is convex. The seventh lens E7 has negative focal power, the object side surface S21 of the seventh lens is concave, and the image side surface S22 of the seventh lens is concave. The eighth lens E8 has negative focal power, the object side surface S23 of the eighth lens is concave, and the image side surface S24 of the eighth lens is concave.

[0137] Table 8 shows the basic structural parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance, effective radius and focal length are all millimeters (mm).

[0138] Table 8

[0139]

[0140]

[0141] Table 9 shows the high-order coefficients that can be used for each aspherical mirror surface in the embodiment, wherein the surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. In this embodiment, the object side surface and the image side surface of the first lens to the eighth lens are all aspherical surfaces.

[0142] Table 9

[0143] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.2965E-02 1.9522E-02 3.7283E-03 4.8764E-04 2.0030E-04 -2.4721E-05 4.2071E-05 S2 7.3663E-02 1.8962E-02 3.4568E-03 4.8209E-04 1.9560E-04 -1.9983E-05 4.1187E-05 S5 3.3237E-02 -1.1453E-03 -6.4669E-04 6.4228E-05 -4.4562E-05 1.2132E-05 -4.5429E-06 S6 3.7700E-02 -1.0646E-03 -6.1200E-04 3.1057E-05 -3.3650E-05 2.1985E-05 -2.5739E-07 S12 -1.4086E-02 -2.1974E-02 6.5249E-04 -4.0629E-04 5.9540E-04 3.4409E-04 1.4422E-04 S13 1.1652E-01 -4.1577E-02 9.0763E-03 -2.9453E-03 1.9589E-03 1.2641E-04 3.3056E-04 S14 -4.4171E-01 3.8146E-02 -9.5642E-04 -5.6091E-04 4.6472E-04 2.1536E-04 1.9967E-04 S15 -4.9673E-01 4.7713E-02 -6.4973E-03 1.8415E-03 -7.7333E-04 2.5925E-04 -4.7222E-05 S16 1.3398E-03 -1.8294E-03 1.3429E-03 8.3065E-04 -1.1897E-04 -2.2116E-05 -8.8560E-06 S17 5.0947E-02 1.2728E-02 2.6969E-03 9.1876E-04 1.3187E-04 1.4540E-05 -3.3265E-05 S19 1.9359E-01 -1.4690E-02 -3.1444E-04 -1.4304E-04 9.1513E-05 -1.8773E-05 -9.0275E-05 S20 3.3797E-01 -5.3353E-03 -1.8887E-04 2.9985E-04 2.1763E-03 -1.4504E-03 -1.8626E-04 S21 -8.2533E-02 7.2354E-02 -8.7898E-03 2.0876E-03 2.9680E-03 -2.2427E-03 -3.1229E-05 S22 -4.9349E-01 7.6860E-02 -1.0224E-02 2.5177E-03 2.1449E-03 -1.4652E-04 1.8045E-04 S23 -7.3272E-01 3.0231E-02 -2.4848E-03 7.3542E-04 2.5235E-03 3.9743E-04 1.0426E-04 S24 -6.2028E-01 6.1284E-02 -6.3464E-03 9.1953E-04 5.1101E-04 -2.1862E-04 5.1813E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 -9.6746E-06 8.3757E-06 -1.0147E-05 7.9763E-08 1.5413E-06 0.0000E+00 0.0000E+00 S2 -1.4866E-05 6.2349E-06 -1.1454E-05 4.4506E-06 1.7020E-06 -6.5860E-07 0.0000E+00 S5 -2.3061E-06 -1.0101E-05 -9.3222E-06 4.1787E-06 5.6859E-06 0.0000E+00 0.0000E+00 S6 -4.7090E-06 -1.8178E-05 -8.5347E-06 5.9530E-06 6.3513E-06 0.0000E+00 0.0000E+00 S12 -8.4529E-05 -1.0724E-04 -2.7383E-05 7.8078E-06 2.4313E-05 0.0000E+00 0.0000E+00 S13 -4.9223E-04 -1.9214E-06 -4.9007E-05 5.2352E-05 1.8387E-05 -9.4758E-06 -8.2367E-07 S14 -4.1843E-04 2.0135E-05 -3.2313E-05 3.0871E-05 1.7863E-05 -5.1861E-06 -2.4344E-06 S15 -1.2547E-04 -2.5955E-05 -8.8877E-06 7.8990E-06 9.1155E-06 8.6379E-07 -3.0151E-06 S16 -4.1572E-05 -1.1721E-05 -1.2719E-05 4.2832E-06 0.0000E+00 0.0000E+00 0.0000E+00 S17 -2.0952E-05 -8.5512E-06 -9.4322E-06 -4.9535E-06 2.9940E-06 0.0000E+00 0.0000E+00 S19 1.9036E-05 4.1722E-06 1.0631E-05 -2.9181E-06 4.1629E-06 -1.4827E-06 0.0000E+00 S20 -4.7683E-05 1.0938E-04 6.3081E-06 -8.9750E-06 8.3118E-06 -4.5971E-07 -9.4564E-07 S21 -1.1816E-04 1.1133E-04 -1.2245E-05 -1.3574E-05 1.1012E-05 -2.1724E-06 0.0000E+00 S22 -1.0499E-04 -4.6179E-05 -5.7589E-05 -2.6945E-05 -8.1866E-06 0.0000E+00 0.0000E+00 S23 -5.1414E-05 -8.8930E-05 -3.8938E-05 -2.1528E-05 0.0000E+00 0.0000E+00 0.0000E+00 S24 -3.2873E-05 1.1482E-06 8.9352E-06 7.8856E-06 4.5557E-06 0.0000E+00 0.0000E+00

[0144] Fig. 22The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.23 The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.24 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different field angles. Fig.25 The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the degree to which the focusing points of light of different wavelengths do not completely overlap.

[0145] according to Figure 22 to Figure 25 It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0146] Embodiment 8

[0147] like Fig.21 As shown, the optical imaging lens of the eighth embodiment of the present application is described, which differs from the seventh embodiment in that the distances and thicknesses between the various spacing elements, lenses, lens barrels, etc. are different.

[0148] Fig.21 FIG. 1 is a schematic diagram of the structure of the optical imaging lens of Embodiment 8. For the sake of brevity, some descriptions similar to those of Embodiment 7 are omitted. In this embodiment, the wall thickness of the third lens barrel is increased, which is beneficial to reducing the risk of stress deformation of the third lens to the fifth lens, and ensuring the assembly stability of the optical imaging lens.

[0149] In summary, the first to eighth embodiments of the optical imaging lens respectively satisfy the relationships shown in Table 10.

[0150] Table 10

[0151] Conditional / Example 1 2 3 4 5 6 7 8 f1 / L10 38.26 53.56 48.88 48.88 47.56 48.91 48.36 48.36 R1 / (D10s-d10s) 24.57 18.08 23.77 24.54 28.09 27.40 18.33 24.50 R2 / (D10m×N1) -16.39 -15.84 -19.65 -17.91 -17.75 -18.22 -17.96 -18.60 R3 / d20s -4.75 -4.76 -4.50 -4.50 -7.31 -7.87 -7.40 -7.40 R4 / D20m -9.60 -9.60 -8.75 -8.75 -20.11 -20.73 -40.09 -39.21 f2 / L20 -78.10 -78.10 -79.99 -79.99 -92.03 -92.03 -85.55 -85.55 (D30m-d30m) / (D30s-d30s) 3.67 5.48 5.83 6.81 5.76 4.47 3.90 2.72 f3 / EP303 9.00 7.93 14.84 14.84 10.59 10.59 12.37 11.24 R6 / d3s -4.77 -4.84 -4.43 -4.43 -4.80 -4.80 -4.02 -4.02 R5×CT3 / D3s 1.20 1.06 1.26 1.18 1.24 1.33 1.52 1.47 f4 / EP34 -5.20 -5.82 -10.62 -9.79 -7.85 -7.34 -7.71 -7.19 R8 / (D4s-d4s) 1.30 0.87 1.16 1.16 1.13 1.43 1.65 1.49 T45 / CT4 1.25 1.25 1.85 1.85 1.52 1.52 1.34 1.34 R13 / d6m -1.07 -1.07 -1.50 -1.51 -1.43 -1.38 -1.78 -1.74 R14 / d7s 1.14 1.12 2.80 2.85 1.78 1.75 2.45 2.49

[0152] Table 11 shows the effective focal lengths f1 to f7 of the optical imaging lenses of Examples 1 to 8, etc., in mm.

[0153] Table 11

[0154]

[0155]

[0156] Table 12 lists some structural parameters of the optical imaging lenses of Examples 1 to 8, with the unit being mm.

[0157] Table 12

[0158] Parameters / Examples 1 2 3 4 5 6 7 8 d3s 5.97 5.89 6.21 6.21 6.75 6.75 6.28 6.28 D3s 7.72 8.72 8.42 9.02 9.02 8.42 7.62 7.92 d4s 5.30 5.29 5.68 5.68 6.00 6.00 5.65 5.65 D4s 7.52 8.62 8.22 8.22 8.82 8.22 7.42 7.62 d6m 5.48 5.46 5.39 5.38 5.67 5.87 5.66 5.77 d7s 5.26 5.36 5.48 5.38 5.40 5.50 5.66 5.56 d10s 10.46 10.47 10.12 10.16 10.56 10.23 10.05 10.04 D10s 11.57 11.97 11.27 11.27 11.67 11.37 11.60 11.20 D10m 11.57 11.97 10.27 11.27 11.67 11.37 11.60 11.20 d20s 7.70 7.70 7.74 7.74 8.50 7.90 7.70 7.70 D20m 8.90 8.90 8.90 8.90 10.10 9.80 8.90 9.10 d30s 8.20 9.20 8.90 9.50 9.50 8.90 8.08 8.38 d30m 6.73 6.73 6.72 6.73 7.33 7.33 6.73 6.73 D30s 8.76 9.76 9.36 9.98 9.96 9.36 8.56 9.36 D30m 8.80 9.80 9.40 10.00 10.00 9.40 8.60 9.40 L10 1.19 0.85 0.94 0.94 1.09 1.06 0.99 0.99 L20 1.19 1.19 1.19 1.19 1.44 1.44 1.19 1.19 EP303 1.26 1.43 0.89 0.89 1.23 1.23 1.09 1.20 EP34 1.68 1.50 1.18 1.28 1.42 1.52 1.39 1.49

[0159] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0160] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0161] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0162] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has eight lenses with optical power, and the optical imaging lens includes: A lens group, wherein the lens group includes first to eighth lenses arranged in sequence from the object side to the image side of the optical imaging lens; a spacer element group, the spacer element group comprising at least a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; A lens barrel group, wherein the lens group and the spacer element group are accommodated in the lens barrel group, and the lens barrel group includes a first lens barrel to a fourth lens barrel that are sequentially arranged from the object side to the image side of the optical imaging lens, the first lens is accommodated in the first lens barrel, the second lens is accommodated in the second lens barrel, the third lens to the fifth lens are accommodated in the third lens barrel, and the sixth lens to the eighth lens are accommodated in the fourth lens barrel; The effective focal length f4 of the fourth lens and the interval EP34 between the third spacing element and the fourth spacing element along the optical axis of the optical imaging lens satisfy the following: -10.62≤f4 / EP34≤-5.20; A curvature radius R8 of the image side surface of the fourth lens, an outer diameter D4s of the object side surface of the fourth spacing element, and an inner diameter d4s of the object side surface of the fourth spacing element satisfy the following: 0.87≤R8 / (D4s-d4s)≤1.

65.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the distance L10 from the object-side end surface of the first lens barrel to the image-side end surface of the first lens barrel along the direction of the optical axis satisfy the following: 38.26≤f1 / L10≤53.

56.

3. The optical imaging lens according to claim 1, wherein: The outer diameter D10s of the object side end surface of the first lens barrel, the inner diameter d10s of the object side end surface of the first lens barrel, and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: 18.08≤R1 / (D10s-d10s)≤28.

09.

4. The optical imaging lens according to claim 1, wherein: The curvature radius R2 of the image side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D10m of the image side end surface of the first lens barrel satisfy the following: -19.65≤R2 / (D10m×N1)≤-15.

84.

5. The optical imaging lens according to claim 1, wherein: The inner diameter d20s of the object-side end surface of the second lens barrel and the curvature radius R3 of the object-side surface of the second lens satisfy the following relationship: -7.87≤R3 / d20s≤-4.

50.

6. The optical imaging lens according to claim 1, wherein: A curvature radius R4 of the image side surface of the second lens and an outer diameter D20m of the image side end surface of the second lens barrel satisfy the following: -40.09≤R4 / D20m≤-8.

75.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens and the distance L20 from the object side end surface of the second lens barrel to the image side end surface of the second lens barrel along the direction of the optical axis satisfy: -92.03≤f2 / L20≤-78.

10.

8. The optical imaging lens according to claim 1, wherein: The outer diameter D30s of the object side end surface of the third lens barrel, the inner diameter d30s of the object side end surface of the third lens barrel, the outer diameter D30m of the image side end surface of the third lens barrel, and the inner diameter d30m of the image side end surface of the third lens barrel satisfy the following relationship: 2.72≤(D30m-d30m) / (D30s-d30s)≤6.

81.

9. The optical imaging lens according to claim 1, wherein: The interval EP303 between the object-side end surface of the third lens barrel and the third spacing element along the direction of the optical axis and the effective focal length f3 of the third lens satisfy the following: 7.93≤f3 / EP303≤14.

84.

10. The optical imaging lens according to claim 1, wherein: A curvature radius R6 of the image side surface of the third lens and an inner diameter d3s of the object side surface of the third spacer element satisfy the following: -4.84≤R6 / d3s≤-4.

02.

11. The optical imaging lens according to claim 1, wherein: An outer diameter D3s of the object side surface of the third spacer element, a curvature radius R5 of the object side surface of the third lens, and a center thickness CT3 of the third lens on the optical axis satisfy the following: 1.06≤R5×CT3 / D3s≤1.

52.

12. The optical imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 1.25≤T45 / CT4≤1.

85.

13. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a sixth spacer element located between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element satisfy: -1.78≤R13 / d6m≤-1.

07.

14. The optical imaging lens according to claim 1, wherein: The spacer element group also includes a seventh spacer element located between the seventh lens and the eighth lens and at least partially in contact with the image side surface of the seventh lens. The inner diameter d7s of the object side surface of the seventh spacer element and the curvature radius R14 of the image side surface of the seventh lens satisfy the following relationship: 1.12≤R14 / d7s≤2.

85.

15. The optical imaging lens according to claim 1, wherein: The first lens has positive focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is convex. The fourth lens has negative focal power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave. The sixth lens has positive focal power, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is convex. The seventh lens has negative focal power, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave. The image side surface of the eighth lens is concave.

16. The optical imaging lens according to claim 1, wherein: The second lens has negative optical power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex. The third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fifth lens has positive optical power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex.

Images