Optical imaging lens

Abstract

The present invention provides an optical imaging lens. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens having positive optical power; and an eighth lens. At least one of the object-side and image-side surfaces of the first lens has at least one inflection point. The effective focal length f of the optical imaging lens satisfies the following relationship with the entrance pupil diameter (EPD) of the optical imaging lens: f / EPD < 1.3. The present invention solves the problem in prior art optical imaging lenses of simultaneously achieving a large image surface, an ultra-large aperture, and miniaturization.

Description

[0001] This application is a divisional application of the patent application submitted to the State Intellectual Property Office of China on November 11, 2021, with application number 202111333808.8 and invention name "Optical Imaging Lens". Technical Field

[0002] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[0003] In recent years, with the rapid development of smartphones, the trend of replacing traditional still cameras with mobile phone cameras has become increasingly evident, and the public is increasingly favoring mobile phones with high-quality camera capabilities. As various mobile devices continue to upgrade their camera performance, the optical imaging lenses that match the electronic photosensitive elements are also constantly being upgraded. Mobile phone manufacturers have placed higher performance requirements on all aspects of the optical imaging lens design process. The existing art provides an optical imaging lens. Although this optical imaging lens can meet the requirements of a large image area and aperture, the overall size of the optical imaging lens is relatively large, making it difficult to meet the requirements of miniaturization.

[0004] In other words, the optical imaging lens in the prior art has the problem that it is difficult to achieve a large image surface, an ultra-large aperture and miniaturization at the same time. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical imaging lens to solve the problem in the prior art that it is difficult to simultaneously achieve a large image surface, an ultra-large aperture, and miniaturization.

[0006] To achieve the above-mentioned objective, according to one aspect of the present invention, there is provided an optical imaging lens, comprising, in order from the object side to the image side along the optical axis: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens having positive optical power; and an eighth lens; wherein at least one of the object-side surface and the image-side surface of the first lens has at least one inflection point; and half the diagonal length of an effective pixel area on the imaging surface, ImgH, satisfies the following requirement: ImgH>4.0mm.

[0007] Furthermore, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD<1.3.

[0008] Furthermore, the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens satisfy the following relationship: 0<(f7-f8) / f1<1.0.

[0009] Furthermore, a curvature radius R5 of the object-side surface of the third lens, a curvature radius R6 of the image-side surface of the third lens, and an effective focal length f3 of the third lens satisfy the following relationship: -1.0<(R5+R6) / f3<0.

[0010] Furthermore, the vertical distance Yc11 from the inflection point on the object side surface of the first lens to the optical axis and the vertical distance Yc12 from the inflection point on the image side surface of the first lens to the optical axis satisfy: 0.3 <Yc12 / Yc11<1.3。

[0011] Furthermore, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy the following relationship: -1.0<(R7+R8) / f4<0.

[0012] Furthermore, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -1.0 <f5 / f6<0。

[0013] Furthermore, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, a curvature radius R3 of the object-side surface of the second lens, and a curvature radius R4 of the image-side surface of the second lens satisfy the following relationship: -2.0<(R1+R2) / (R3+R4)<-0.5.

[0014] Furthermore, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the curvature radius R15 of the object side surface of the eighth lens, and the curvature radius R16 of the image side surface of the eighth lens satisfy the following relationship: -1.0 <R10 / R9+R16 / R15<0。

[0015] Furthermore, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R13 of the object side surface of the seventh lens satisfy: <R11 / (R11-R13)<1.0。

[0016] Furthermore, the maximum effective radius DT72 of the image side surface of the seventh lens and the maximum effective radius DT81 of the object side surface of the eighth lens satisfy: 0.1 mm <DT81-DT72<0.6mm。

[0017] Furthermore, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: <f34 / f12<1.0。

[0018] Furthermore, the combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f78 of the seventh lens and the eighth lens satisfy: -1.0 <f78 / f56<0。

[0019] Furthermore, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following conditions: 0.5 <CT3 / (CT1+CT2+CT4)<1.5。

[0020] Furthermore, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy the following relationship: 0<(CT7+CT8) / (CT5+CT6)<1.0.

[0021] Furthermore, the air interval T45 between the fourth lens and the fifth lens on the optical axis, the air interval T67 between the sixth lens and the seventh lens on the optical axis, and the air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following conditions: 0.3 <T45 / (T67+T78)<0.8。

[0022] Furthermore, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT41 of the object side surface of the fourth lens satisfy the following relationship: 0.5 <DT41 / DT11<1.0。

[0023] Furthermore, the first lens has positive refractive power, the object-side surface of the first lens is concave, and the image-side surface of the first lens is convex.

[0024] Furthermore, the third lens has positive 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 power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave.

[0025] Furthermore, the sixth lens has negative optical power, and the object-side surface of the sixth lens is concave; the seventh lens has positive optical power, and the object-side surface of the seventh lens is convex.

[0026] According to another aspect of the present invention, an optical imaging lens is provided, comprising, in order from the object side to the image side along the optical axis: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; a seventh lens having positive optical power; and an eighth lens; wherein at least one of the object-side surface and the image-side surface of the first lens has at least one inflection point; and the effective focal length f of the optical imaging lens and the entrance pupil diameter (EPD) of the optical imaging lens satisfy the following relationship: f / EPD<1.3.

[0027] Furthermore, half the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: ImgH>4.0mm; the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens satisfy: 0<(f7-f8) / f1<1.0.

[0028] Furthermore, a curvature radius R5 of the object-side surface of the third lens, a curvature radius R6 of the image-side surface of the third lens, and an effective focal length f3 of the third lens satisfy the following relationship: -1.0<(R5+R6) / f3<0.

[0029] Furthermore, the vertical distance Yc11 from the inflection point on the object side surface of the first lens to the optical axis and the vertical distance Yc12 from the inflection point on the image side surface of the first lens to the optical axis satisfy: 0.3 <Yc12 / Yc11<1.3。

[0030] Furthermore, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy the following relationship: -1.0<(R7+R8) / f4<0.

[0031] Furthermore, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -1.0 <f5 / f6<0。

[0032] Furthermore, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, a curvature radius R3 of the object-side surface of the second lens, and a curvature radius R4 of the image-side surface of the second lens satisfy the following relationship: -2.0<(R1+R2) / (R3+R4)<-0.5.

[0033] Furthermore, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the curvature radius R15 of the object side surface of the eighth lens, and the curvature radius R16 of the image side surface of the eighth lens satisfy the following relationship: -1.0 <R10 / R9+R16 / R15<0。

[0034] Furthermore, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R13 of the object side surface of the seventh lens satisfy: <R11 / (R11-R13)<1.0。

[0035] Furthermore, the maximum effective radius DT72 of the image side surface of the seventh lens and the maximum effective radius DT81 of the object side surface of the eighth lens satisfy: 0.1 mm <DT81-DT72<0.6mm。

[0036] Furthermore, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: <f34 / f12<1.0。

[0037] Furthermore, the combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f78 of the seventh lens and the eighth lens satisfy: -1.0 <f78 / f56<0。

[0038] Furthermore, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following conditions: 0.5 <CT3 / (CT1+CT2+CT4)<1.5。

[0039] Furthermore, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy the following relationship: 0<(CT7+CT8) / (CT5+CT6)<1.0.

[0040] Furthermore, the air interval T45 between the fourth lens and the fifth lens on the optical axis, the air interval T67 between the sixth lens and the seventh lens on the optical axis, and the air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following conditions: 0.3 <T45 / (T67+T78)<0.8。

[0041] Furthermore, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT41 of the object side surface of the fourth lens satisfy the following relationship: 0.5 <DT41 / DT11<1.0。

[0042] Furthermore, the first lens has positive refractive power, the object-side surface of the first lens is concave, and the image-side surface of the first lens is convex.

[0043] Furthermore, the third lens has positive 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 power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave.

[0044] Furthermore, the sixth lens has negative optical power, and the object-side surface of the sixth lens is concave; the seventh lens has positive optical power, and the object-side surface of the seventh lens is convex.

[0045] Applying the technical solution of the present invention, the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the seventh lens has positive optical power; wherein at least one of the object-side surface and the image-side surface of the first lens has at least one inflection point; and half the diagonal length of the effective pixel area on the imaging plane, ImgH, satisfies the following requirement: ImgH>4.0mm.

[0046] By constraining the effective pixel area on the imaging surface to half its diagonal length, ImgH, the optical imaging lens, while maintaining a large image surface, reduces the deflection angle of incident light, continuously increasing the relative aperture of the optical system and maintaining the ultra-large aperture characteristic to obtain more light throughput. This enhances the imaging effect of the optical imaging lens in dark environments and improves the close-range imaging effect of large-aperture systems. Furthermore, the optical imaging lens of this application is composed of eight lenses, which facilitates miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0048] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present invention;

[0049] Figures 2 to 4 Shown respectively Figure 1 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0050] Figure 5 A schematic structural diagram of an optical imaging lens according to Example 2 of the present invention is shown;

[0051] Figures 6 to 8 Shown respectively Figure 5 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0052] Figure 9 1. A schematic structural diagram of an optical imaging lens according to Example 3 of the present invention is shown;

[0053] Figures 10 to 12 Shown respectively Figure 9 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0054] Figure 13 1. A schematic structural diagram of an optical imaging lens according to Example 4 of the present invention is shown;

[0055] Figures 14 to 16 Shown respectively Figure 13 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0056] Figure 17 1. A schematic structural diagram of an optical imaging lens according to Example 5 of the present invention is shown;

[0057] Figures 18 to 20 Shown respectively Figure 17The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0058] Figure 21 1. A schematic structural diagram of an optical imaging lens according to Example 6 of the present invention is shown;

[0059] Figures 22 to 24 Shown respectively Figure 21 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0060] Figure 25 1. A schematic structural diagram of an optical imaging lens according to Example 7 of the present invention is shown;

[0061] Figures 26 to 28 Shown respectively Figure 25 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens;

[0062] Figure 29 1. A schematic structural diagram of an optical imaging lens according to Example 8 of the present invention is shown;

[0063] Figures 30 to 32 Shown respectively Figure 29 The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical imaging lens.

[0064] The above drawings include the following reference numerals:

[0065] E1, first lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; E2, second lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; E3, third lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; E4, fourth lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, sixth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; E7, seventh lens; S13, object-side surface of the seventh lens; S14, image-side surface of the seventh lens; E8, eighth lens; S15, object-side surface of the eighth lens; S16, image-side surface of the eighth lens; E9, filter; S17, object-side surface of the filter; S18, image-side surface of the filter; S19, imaging surface. DETAILED DESCRIPTION

[0066] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0067] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0068] 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 direction; 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 directional words are not used to limit the present invention.

[0069] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0070] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0071] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the convex surface position 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 concave surface position is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of common knowledge in this field, and the positive and negative R value (R refers to the curvature radius 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. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0072] In order to solve the problem in the prior art that a large image surface, an ultra-large aperture and miniaturization are difficult to achieve simultaneously in optical imaging lenses, the present invention provides an optical imaging lens.

[0073] Example 1

[0074] like Figures 1 to 32As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the seventh lens has positive optical power; wherein, at least one surface of the object side surface and the image side surface of the first lens has at least one inflection point; and half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: ImgH>4.0mm.

[0075] By constraining the effective pixel area on the imaging surface to half its diagonal length, ImgH, the optical imaging lens, while maintaining a large image surface, reduces the deflection angle of incident light, continuously increasing the relative aperture of the optical system and maintaining the ultra-large aperture characteristic to obtain more light throughput. This enhances the imaging effect of the optical imaging lens in dark environments and improves the close-range imaging effect of large-aperture systems. Furthermore, the optical imaging lens of this application is composed of eight lenses, which facilitates miniaturization.

[0076] In this embodiment, the effective focal length f of the optical imaging lens satisfies the following relationship: f / EPD < 1.3. By constraining the ratio of the effective focal length f to the entrance pupil diameter EPD of the optical imaging lens within a reasonable range, more light throughput is achieved, thereby improving the imaging quality of the optical imaging lens in dark environments. Preferably, f / EPD = 1.20.

[0077] In this embodiment, the effective focal length f1 of the first lens element, the effective focal length f7 of the seventh lens element, and the effective focal length f8 of the eighth lens element satisfy the following equation: 0 < (f7 - f8) / f1 < 1.0. This conditional equation facilitates a reasonable distribution of the focal lengths of the first, seventh, and eighth lenses, increasing the aperture while improving close-range imaging. Preferably, 0.1 < (f7 - f8) / f1 < 0.9.

[0078] In this embodiment, the radius of curvature R5 of the object-side surface of the third lens element, the radius of curvature R6 of the image-side surface of the third lens element, and the effective focal length f3 of the third lens element satisfy the following relationship: -1.0 < (R5 + R6) / f3 < 0. Meeting this conditional equation helps improve ghost images caused by internal reflections within the third lens element and reduces aberrations at ultra-large apertures, thereby improving imaging quality. Preferably, -0.8 < (R5 + R6) / f3 < -0.3.

[0079] In this embodiment, the vertical distance Yc11 from the inflection point on the object side of the first lens to the optical axis and the vertical distance Yc12 from the inflection point on the image side of the first lens to the optical axis satisfy: 0.3 < Yc12 / Yc11 < 1.3. Meeting this conditional expression is conducive to ensuring that the optical imaging lens converges incident light and reduces the light deflection angle in the large aperture state. Preferably, 0.8 < Yc12 / Yc11 < 1.0.

[0080] In this embodiment, the curvature radius R7 of the object side of the fourth lens, the curvature radius R8 of the image side of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: -1.0 < (R7 + R8) / f4 < 0. Meeting this conditional expression has the effect of reducing aberration and improving imaging quality in a large aperture, while weakening the reflected ghost image inside the fourth lens. Preferably, -0.6 < (R7 + R8) / f4 < -0.4.

[0081] In this embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: -1.0 < f5 / f6 < 0. Meeting this conditional expression is conducive to the reasonable distribution of the focal lengths of the fifth lens and the sixth lens and improves the lateral chromatic aberration of the optical system. Preferably, -0.9 < f5 / f6 < -0.5.

[0082] In this embodiment, the curvature radius R1 of the object side of the first lens, the curvature radius R2 of the image side of the first lens, the curvature radius R3 of the object side of the second lens, and the curvature radius R4 of the image side of the second lens satisfy: -2.0 < (R1 + R2) / (R3 + R4) < -0.5. Meeting this conditional expression is conducive to the reasonable distribution of the curvature radii of the first lens and the second lens, and is conducive to reducing the light deflection angle during the process of increasing the light passing aperture, so as to achieve the purpose of reducing sensitivity and collecting light. Preferably, -1.1 < (R1 + R2) / (R3 + R4) < -0.8.

[0083] In this embodiment, the curvature radius R9 of the object side of the fifth lens, the curvature radius R10 of the image side of the fifth lens, the curvature radius R15 of the object side of the eighth lens, and the curvature radius R16 of the image side of the eighth lens satisfy: -1.0 < R10 / R9 + R16 / R15 < 0. Meeting this conditional expression is conducive to the transition of light, reduces the deflection angle, and improves the imaging effect of the near scene at the same time. Preferably, -0.7 < R10 / R9 + R16 / R15 < -0.4.

[0084] In this embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R13 of the object side surface of the seventh lens satisfy: 0 < R11 / (R11 - R13) < 1.0. Satisfying this conditional expression is conducive to reasonably controlling the shapes of the sixth lens and the seventh lens and controlling the amount of the air gap to obtain the processing characteristics of the lens. Preferably, 0.4 < R11 / (R11 - R13) < 0.7.

[0085] In this embodiment, the maximum effective radius DT72 of the image side surface of the seventh lens and the maximum effective radius DT81 of the object side surface of the eighth lens satisfy: 0.1 mm < DT81 - DT72 < 0.6 mm. Satisfying this conditional expression is conducive to ensuring the miniaturization of the optical system while increasing the image surface. Preferably, 0.2 mm < DT81 - DT72 < 0.5 mm.

[0086] [[ID=,6]]In this embodiment, the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: 0 < f34 / f12 < 1.0. Satisfying this conditional expression is conducive to reasonably distributing the focal lengths of the first lens to the fourth lens, and can achieve the effects of increasing the light transmission amount and improving the imaging quality. Preferably, 0.1 < f34 / f12 < 1.0.

[0087] In this embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f78 of the seventh lens and the eighth lens satisfy: -1.0 < f78 / f56 < 0. Satisfying this conditional expression is conducive to reasonably distributing the focal lengths of the fifth lens to the eighth lens, and can achieve the effect of improving the imaging quality of the near view. Preferably, -1.0 < f78 / f56 < -0.5.

[0088] In this embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.5 < CT3 / (CT1 + CT2 + CT4) < 1.5. Satisfying this conditional expression is conducive to ensuring the processing characteristics of the lens on the basis of increasing the aperture. Preferably, 0.8 < CT3 / (CT1 + CT2 + CT4) < 1.2.

[0089] In this embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, and the central thickness CT8 of the eighth lens on the optical axis satisfy: 0 < (CT7 + CT8) / (CT5 + CT6) < 1.0. Satisfying this conditional expression is conducive to improving the processing characteristics of the lens on the basis of improving the imaging of the near view. Preferably, 0.6 < (CT7 + CT8) / (CT5 + CT6) < 0.9.

[0090] In this embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the air gap T78 between the seventh lens and the eighth lens on the optical axis satisfy: 0.3 < T45 / (T67 + T78) < 0.8. Satisfying this conditional expression is conducive to reasonably utilizing the air gap between the lenses to slow down the deflection angle of light rays, reduce sensitivity, and at the same time ensure the imaging quality of the near scene. Preferably, 0.4 < T45 / (T67 + T78) < 0.6.

[0091] In this embodiment, the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 0.5 < DT41 / DT11 < 1.0. Satisfying this conditional expression is conducive to ensuring the aesthetic appearance of the optical imaging lens and at the same time miniaturizing the control system. Preferably, 0.6 < DT41 / DT11 < 0.8.

[0092] In this embodiment, the first lens has a positive optical power, the object side surface of the first lens is concave, and the image side surface of the first lens is convex. Such a setting slows down the deflection angle of light rays and reduces sensitivity while increasing the light passing aperture.

[0093] In this embodiment, the third lens has a 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 fourth lens has a negative optical power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave. Such a setting improves the deflection of light rays, reduces aberration, and improves the imaging quality in the case of a large aperture.

[0094] In this embodiment, the sixth lens has a negative optical power, the object side surface of the sixth lens is concave; the seventh lens has a positive optical power, the object side surface of the seventh lens is convex. Such a setting is conducive to improving the imaging quality of the near scene.

[0095] Embodiment Two

[0096] As Figures 1 to 32 shown, the optical imaging lens sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along the optical axis from the object side to the image side; the seventh lens has a positive optical power; wherein, at least one surface of the object side surface and the image side surface of the first lens has at least one inflection point; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.3. Preferably, f / EPD = 1.20.

[0097] By restricting the ratio of the effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens within a reasonable range, more light transmission can be obtained to improve the imaging effect of the optical imaging lens in a dark environment. Additionally, the optical imaging lens of the present application consists of eight lenses, which is conducive to miniaturization.

[0098] In this embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfies: ImgH > 4.0 mm. By restricting half of the diagonal length ImgH of the effective pixel area on the imaging surface, while ensuring the optical imaging lens has a large imaging surface, the deflection angle of the incident light is reduced, the relative aperture of the optical system is continuously increased, and the characteristics of a super-large aperture are ensured to obtain more light transmission, so as to improve the imaging effect of the optical imaging lens in a dark environment and at the same time improve the near-field imaging effect of the large-aperture system.

[0099] Among the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens, the following is satisfied: 0 < (f7 - f8) / f1 < 1.0. Satisfying this conditional expression is conducive to reasonably distributing the focal lengths of the first lens, the seventh lens, and the eighth lens, and is conducive to increasing the passing aperture while improving the near-field imaging effect. Preferably, 0.1 < (f7 - f8) / f1 < 0.9.

[0100] In this embodiment, between the curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, and the effective focal length f3 of the third lens, the following is satisfied: -1.0 < (R5 + R6) / f3 < 0. Satisfying this conditional expression is conducive to improving the ghost image of internal reflection in the third lens and at the same time plays a role in reducing aberration in a super-large aperture, achieving the effect of improving the imaging quality. Preferably, -0.8 < (R5 + R6) / f3 < -0.3. <�

[0101] In this embodiment, between the perpendicular distance Yc11 from the inflection point on the object side surface of the first lens to the optical axis and the perpendicular distance Yc12 from the inflection point on the image side surface of the first lens to the optical axis, the following is satisfied: 0.3 < Yc12 / Yc11 < 1.3. Satisfying this conditional expression is conducive to ensuring that the optical imaging lens converges the incident light and reduces the light deflection angle in a large-aperture state. Preferably, 0.8 < Yc12 / Yc11 < 1.0.

[0102] In this embodiment, between the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the effective focal length f4 of the fourth lens, the following is satisfied: -1.0 < (R7 + R8) / f4 < 0. Satisfying this conditional expression plays a role in reducing aberration and improving the imaging quality in a large aperture, and at the same time weakens the internal reflection ghost image of the fourth lens. Preferably, -0.6 < (R7 + R8) / f4 < -0.4.

[0103] In this embodiment, the following condition is satisfied between the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens: -1.0 < f5 / f6 < 0. Satisfying this conditional expression is conducive to the reasonable distribution of the focal lengths of the fifth lens and the sixth lens, and improves the lateral chromatic aberration of the optical system. Preferably, -0.9 < f5 / f6 < -0.5.

[0104] In this embodiment, the following condition is satisfied between the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens: -2.0 < (R1 + R2) / (R3 + R4) < -0.5. Satisfying this conditional expression is conducive to the reasonable distribution of the curvature radii of the first lens and the second lens, and is conducive to reducing the deflection angle of light during the process of increasing the light passing aperture, so as to achieve the purpose of reducing sensitivity and light collection. Preferably, -1.1 < (R1 + R2) / (R3 + R4) < -0.8.

[0105] In this embodiment, the following condition is satisfied between the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the curvature radius R15 of the object side surface of the eighth lens, and the curvature radius R16 of the image side surface of the eighth lens: -1.0 < R10 / R9 + R16 / R15 < 0. Satisfying this conditional expression is conducive to the transition of light, reduces the deflection angle, and simultaneously improves the imaging effect of the near scene. Preferably, -0.7 < R10 / R9 + R16 / R15 < -0.4.

[0106] In this embodiment, the following condition is satisfied between the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R13 of the object side surface of the seventh lens: 0 < R11 / (R11 - R13) < 1.0. Satisfying this conditional expression is conducive to the reasonable control of the shapes of the sixth lens and the seventh lens, and controls the amount of air gap to obtain the processing characteristics of the lens. Preferably, 0.4 < R11 / (R11 - R13) < 0.7.

[0107] In this embodiment, the following condition is satisfied between the maximum effective radius DT72 of the image side surface of the seventh lens and the maximum effective radius DT81 of the object side surface of the eighth lens: 0.1 mm < DT81 - DT72 < 0.6 mm. Satisfying this conditional expression is conducive to ensuring the miniaturization of the optical system while increasing the image plane. Preferably, 0.2 mm < DT81 - DT72 < 0.5 mm.

[0108] In this embodiment, the following condition is satisfied between the combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens: 0 < f34 / f12 < 1.0. Satisfying this conditional expression is conducive to the reasonable distribution of the focal lengths of the first lens to the fourth lens, and can achieve the effect of increasing the light passing amount and improving the imaging quality. Preferably, 0.1 < f34 / f12 < 1.0.

[0109] In this embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f78 of the seventh lens and the eighth lens satisfy: -1.0 < f78 / f56 < 0. Meeting this conditional formula is beneficial to reasonably distribute the focal lengths of the fifth lens to the eighth lens, and can achieve the effect of improving the imaging quality of the near view. Preferably, -1.0 < f78 / f56 < -0.5.

[0110] In this embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.5 < CT3 / (CT1 + CT2 + CT4) < 1.5. Meeting this conditional formula is beneficial to ensuring the processing characteristics of the lens while increasing the aperture. Preferably, 0.8 < CT3 / (CT1 + CT2 + CT4) < 1.2.

[0111] In this embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, and the central thickness CT8 of the eighth lens on the optical axis satisfy: 0 < (CT7 + CT8) / (CT5 + CT6) < 1.0. Meeting this conditional formula is beneficial to improving the processing characteristics of the lens while improving the near-view imaging. Preferably, 0.6 < (CT7 + CT8) / (CT5 + CT6) < 0.9.

[0112] In this embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the air gap T78 between the seventh lens and the eighth lens on the optical axis satisfy: 0.3 < T45 / (T67 + T78) < 0.8. Meeting this conditional formula is beneficial to reasonably utilizing the air gap between the lenses to slow down the deflection angle of the light rays, reduce the sensitivity, and at the same time ensure the imaging quality of the near view. Preferably, 0.4 < T45 / (T67 + T78) < 0.6.

[0113] In this embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT41 of the object side surface of the fourth lens satisfy: 0.5 < DT41 / DT11 < 1.0. Meeting this conditional formula is beneficial to ensuring the aesthetics of the appearance of the optical imaging lens and at the same time miniaturizing the control system. Preferably, 0.6 < DT41 / DT11 < 0.8.

[0114] In this embodiment, the first lens has a positive optical power. The object side surface of the first lens is concave, and the image side surface of the first lens is convex. Such a setting slows down the deflection angle of the light rays and reduces the sensitivity while increasing the light passing aperture.

[0115] In this embodiment, the third lens has positive power, with its object-side surface and image-side surface both convex. The fourth lens has negative power, with its object-side surface and image-side surface both convex. This arrangement improves light deflection, reduces aberrations, and enhances image quality at large apertures.

[0116] In this embodiment, the sixth lens has negative optical power and its object-side surface is concave, while the seventh lens has positive optical power and its object-side surface is convex. This arrangement is conducive to improving the imaging quality of close-up shots.

[0117] Optionally, the optical imaging lens may further include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the imaging surface.

[0118] The optical imaging lens in this application can utilize multiple lenses, such as the eight lenses described above. By properly allocating the focal power, surface shape, center thickness, and on-axis distance between each lens, the aperture of the optical imaging lens can be effectively increased, sensitivity reduced, and processability improved, making the optical imaging lens more amenable to production and suitable for portable electronic devices such as smartphones. The left side is the object side, and the right side is the image side.

[0119] In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspheric lenses minimizes aberrations that occur during imaging, thereby improving image quality.

[0120] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while eight lenses are described in the embodiments, the optical imaging lens is not limited to eight lenses. If desired, the optical imaging lens may include other numbers of lenses.

[0121] 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.

[0122] It should be noted that any one of the following examples 1 to 8 is applicable to all embodiments of the present application.

[0123] Example 1

[0124] like Figures 1 to 4 As shown, the optical imaging lens of Example 1 of the present application is described. Figure 1 A schematic diagram of the optical imaging lens structure of Example 1 is shown.

[0125] like Figure 1 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0126] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has negative focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0127] In this example, the total effective focal length f of the optical imaging lens is 5.03 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.5°, the total length TTL of the optical imaging lens is 7.90 mm, and the image height ImgH is 4.23 mm.

[0128] Table 1 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0129]

[0130] Table 1

[0131] In Example 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. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0132]

[0133] Where x is the distance from the vertex of the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, and A22 that can be used for each aspheric mirror surface S1-S16 in Example 1.

[0134] Face number A4 A6 A8 A10 A12 S1 1.6871E+00 -4.7484E-02 5.8791E-03 6.6595E-04 3.2620E-04 S2 1.2468E+00 -4.7646E-02 1.7273E-02 -2.6372E-03 1.5922E-03 S3 -7.6693E-01 -3.5462E-02 -1.7407E-02 2.4262E-03 -1.3155E-03 S4 -4.8476E-01 -1.9470E-02 5.3938E-03 -4.3656E-03 1.1346E-03 S5 4.1596E-01 -2.5154E-02 2.7423E-02 -1.3242E-02 4.7387E-03 S6 2.1235E-01 -2.0179E-02 -1.0180E-03 -1.7475E-04 6.4143E-04 S7 -3.1924E-01 -1.6656E-02 1.0653E-02 1.3046E-03 -1.2263E-03 S8 -2.8604E-01 -5.5734E-03 6.4130E-03 2.5639E-03 -5.6664E-04 S9 2.6081E-01 -9.6656E-03 -1.0469E-02 -5.3778E-04 -3.2855E-04 S10 5.2846E-01 -1.9438E-02 -1.2744E-02 -5.9625E-03 -4.3451E-03 S11 9.7492E-02 2.7896E-02 2.4701E-03 -3.2335E-04 -4.9602E-03 S12 -3.4252E-01 7.2741E-02 6.8230E-03 4.9223E-03 8.5773E-04 S13 -8.4178E-01 -1.4077E-01 4.2474E-02 8.3815E-03 9.2445E-03 S14 -2.7896E-01 3.9322E-02 9.5037E-02 -3.5335E-02 6.8832E-04 S15 -8.5957E-01 4.7575E-01 -1.3084E-01 4.4386E-03 1.2455E-02 S16 -2.8754E+00 4.5696E-01 -1.5578E-01 4.9600E-02 -1.6323E-02 Face number A14 A16 A18 A20 A22 S1 -7.2010E-04 3.6370E-04 -1.7870E-04 1.2181E-04 0.0000E+00 S2 -5.8741E-04 1.1164E-04 -1.0060E-04 -1.5781E-05 0.0000E+00 S3 -3.6937E-04 1.6074E-06 -4.0933E-06 0.0000E+00 0.0000E+00 S4 -6.3332E-04 5.3464E-05 5.6070E-07 7.9242E-07 0.0000E+00 S5 -1.1978E-03 2.7187E-04 1.7439E-05 1.8238E-06 0.0000E+00 S6 4.3585E-05 -1.9632E-05 -1.0776E-07 0.0000E+00 0.0000E+00 S7 4.0787E-04 -5.5990E-05 -5.0714E-07 0.0000E+00 0.0000E+00 S8 3.9381E-04 7.9493E-06 8.6711E-07 0.0000E+00 0.0000E+00 S9 6.6291E-05 9.3745E-05 8.9632E-07 0.0000E+00 0.0000E+00 S10 -3.4035E-04 1.6856E-04 7.5110E-08 -4.8575E-08 0.0000E+00 S11 -9.6381E-04 -5.6408E-05 3.1241E-07 1.1279E-08 0.0000E+00 S12 -1.4412E-04 1.4103E-04 -2.7983E-06 -1.4195E-07 0.0000E+00 S13 2.5950E-03 8.7185E-04 3.9961E-05 3.0346E-06 0.0000E+00 S14 -5.4941E-04 9.1541E-04 2.0306E-05 6.5926E-07 0.0000E+00 S15 -5.1239E-03 9.4358E-04 3.6043E-05 2.1954E-06 1.4269E-07 S16 1.9501E-03 6.7885E-04 1.7673E-05 4.9611E-07 0.0000E+00

[0135] Table 2

[0136] Figure 2 The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 3 The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4 The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0137] according to Figures 2 to 4 It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0138] Example 2

[0139] like Figures 5 to 8 FIG2 shows an optical imaging lens according to Example 2 of the present application. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 5 A schematic diagram of the optical imaging lens structure of Example 2 is shown.

[0140] like Figure 5 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0141] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has negative focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0142] In this example, the total effective focal length f of the optical imaging lens is 5.03 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.5°, the total length TTL of the optical imaging lens is 7.49 mm, and the image height ImgH is 4.21 mm.

[0143] Table 3 shows the basic structural parameters of the optical imaging lens of Example 2, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0144]

[0145]

[0146] Table 3

[0147] Table 4 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0148] Face number A4 A6 A8 A10 A12 S1 1.3766E+00 -3.1814E-02 -2.2058E-03 6.2156E-04 6.1224E-04 S2 1.1403E+00 -1.1251E-02 1.2714E-02 -5.9340E-04 1.6763E-03 S3 -7.9375E-01 -3.5433E-02 -1.7452E-02 2.8772E-03 -1.4086E-03 S4 -5.1560E-01 -7.0055E-03 2.8692E-03 -2.5454E-03 6.0557E-04 S5 3.4963E-01 -6.6336E-03 1.9454E-02 -1.1028E-02 3.9829E-03 S6 2.4461E-01 -2.5219E-02 -5.2510E-04 -2.7511E-04 7.5506E-04 S7 -4.1461E-01 1.5923E-04 7.6816E-03 2.0832E-03 -1.5000E-03 S8 -4.0149E-01 3.7493E-03 8.8512E-04 3.0120E-03 -7.6200E-04 S9 2.2049E-01 -2.5986E-03 -9.7401E-03 -3.1970E-04 -1.2716E-04 S10 5.0366E-01 -2.0926E-02 -7.8706E-03 -5.7111E-03 -3.7172E-03 S11 -1.2087E-02 2.7246E-02 1.4136E-03 3.2570E-03 -4.5700E-03 S12 -4.6725E-01 8.2598E-02 2.1715E-03 9.2277E-03 6.2271E-04 S13 -9.7104E-01 -1.2568E-01 3.6924E-02 1.1084E-02 9.1508E-03 S14 -4.9437E-01 9.4587E-02 9.0085E-02 -3.8223E-02 -3.8218E-03 S15 -6.9032E-01 5.0465E-01 -1.4723E-01 7.8235E-03 1.1212E-02 S16 -2.1511E+00 3.2919E-01 -1.3133E-01 5.2321E-02 -1.3871E-02 Face number A14 A16 A18 A20 A22 S1 -1.2598E-03 4.7528E-04 -2.6974E-04 1.0851E-04 0.0000E+00 S2 -7.7938E-04 8.4075E-05 -1.7038E-04 -3.0692E-05 0.0000E+00 S3 -4.4151E-04 -1.9702E-05 -7.1224E-06 0.0000E+00 0.0000E+00 S4 -5.5225E-04 2.5130E-05 -4.8208E-07 8.0439E-07 0.0000E+00 S5 -9.7747E-04 2.1431E-04 1.2623E-05 1.2387E-06 0.0000E+00 S6 -1.7728E-06 -1.9834E-05 -1.0353E-07 0.0000E+00 0.0000E+00 S7 3.6437E-04 -1.6253E-05 -5.3646E-08 0.0000E+00 0.0000E+00 S8 3.1725E-04 5.9239E-06 -1.2309E-07 0.0000E+00 0.0000E+00 S9 3.0503E-05 6.8283E-05 2.8847E-07 0.0000E+00 0.0000E+00 S10 -6.1773E-05 -8.6861E-05 -1.1092E-06 -5.0799E-08 0.0000E+00 S11 -5.0004E-04 -4.5339E-04 -1.8199E-06 -5.3375E-09 0.0000E+00 S12 4.6702E-04 3.8921E-06 -3.3460E-06 -1.5787E-07 0.0000E+00 S13 3.3209E-03 1.3091E-03 6.8336E-05 5.5111E-06 0.0000E+00 S14 7.9074E-04 1.6907E-03 5.3859E-05 2.5298E-06 0.0000E+00 S15 -4.0733E-03 6.4027E-04 2.7482E-05 1.9499E-06 1.6844E-07 S16 2.9272E-03 7.7537E-04 2.4596E-05 2.4396E-06 0.0000E+00

[0149] Table 4

[0150] Figure 6 The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 7 The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0151] according to Figures 6 to 8 It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0152] Example 3

[0153] like Figures 9 to 12 As shown, the optical imaging lens of Example 3 of this application is described. Figure 9 A schematic diagram of the optical imaging lens structure of Example 3 is shown.

[0154] like Figure 9 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0155] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0156] In this example, the total effective focal length f of the optical imaging lens is 5.03 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.5°, the total length TTL of the optical imaging lens is 7.43 mm, and the image height ImgH is 4.19 mm.

[0157] Table 5 shows the basic structural parameters of the optical imaging lens of Example 3, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0158]

[0159]

[0160] Table 5

[0161] Table 6 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 3, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0162]

[0163]

[0164] Table 6

[0165] Figure 10 The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 11 The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12 The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0166] according to Figures 10 to 12 It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0167] Example 4

[0168] like Figures 13 to 16 As shown, the optical imaging lens of Example 4 of the present application is described. Figure 13 A schematic diagram of the optical imaging lens structure of Example 4 is shown.

[0169] like Figure 13 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0170] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0171] In this example, the total effective focal length f of the optical imaging lens is 5.03 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.5°, the total length TTL of the optical imaging lens is 7.43 mm, and the image height ImgH is 4.19 mm.

[0172] Table 7 shows the basic structural parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0173]

[0174]

[0175] Table 7

[0176] Table 8 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0177]

[0178]

[0179] Table 8

[0180] Figure 14 The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 15The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 16 The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0181] according to Figures 14 to 16 It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0182] Example 5

[0183] like Figures 17 to 20 As shown, the optical imaging lens of Example 5 of the present application is described. Figure 17 A schematic diagram of the optical imaging lens structure of Example 5 is shown.

[0184] like Figure 17 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0185] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0186] In this example, the total effective focal length f of the optical imaging lens is 5.15 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.3°, the total length TTL of the optical imaging lens is 7.45 mm, and the image height ImgH is 4.33 mm.

[0187] Table 9 shows the basic structural parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0188]

[0189]

[0190] Table 9

[0191] Table 10 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0192]

[0193]

[0194] Table 10

[0195] Figure 18 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. Figure 19 The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents meridional field curvature and sagittal field curvature. Figure 20 The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0196] according to Figures 18 to 20 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0197] Example 6

[0198] like Figures 21 to 24 As shown, the optical imaging lens of Example 6 of the present application is described. Figure 21 A schematic diagram of the optical imaging lens structure of Example 6 is shown.

[0199] like Figure 21 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0200] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being convex. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0201] In this example, the total effective focal length f of the optical imaging lens is 5.18 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.3°, the total length TTL of the optical imaging lens is 7.49 mm, and the image height ImgH is 4.36 mm.

[0202] Table 11 shows the basic structural parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0203]

[0204] Table 11

[0205] Table 12 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 6, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0206]

[0207]

[0208] Table 12

[0209] Figure 22 The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 23 The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents meridional field curvature and sagittal field curvature. Figure 24The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0210] according to Figures 22 to 24 It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0211] Example 7

[0212] like Figures 25 to 28 As shown, the optical imaging lens of Example 7 of the present application is described. Figure 25 A schematic diagram of the optical imaging lens structure of Example 7 is shown.

[0213] like Figure 25 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0214] The first lens E1 has positive focal power, with its object-side surface S1 being concave, and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex, and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex, and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex, and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex, and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave, and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex, and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0215] In this example, the total effective focal length f of the optical imaging lens is 5.18 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.3°, the total length TTL of the optical imaging lens is 7.54 mm, and the image height ImgH is 4.36 mm.

[0216] Table 13 shows the basic structural parameters of the optical imaging lens of Example 7, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0217]

[0218] Table 13

[0219] Table 14 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 7, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0220]

[0221]

[0222] Table 14

[0223] Figure 26 The 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. Figure 27 The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 28 The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0224] according to Figures 26 to 28 It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0225] Example 8

[0226] like Figures 29 to 32 As shown, the optical imaging lens of Example 8 of the present application is described. Figure 29 A schematic diagram of the optical imaging lens structure of Example 8 is shown.

[0227] like Figure 29 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 fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0228] The first lens E1 has positive focal power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens element E8 has negative power. Its object-side surface S15 is concave, and its image-side surface S16 is concave. The optical filter E9 has an object-side surface S17 and an image-side surface S18. Light from an object passes through surfaces S1 to S18 in sequence and is ultimately imaged on imaging surface S19.

[0229] In this example, the total effective focal length f of the optical imaging lens is 5.24 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 39.3°, the total length TTL of the optical imaging lens is 7.60 mm, and the image height ImgH is 4.41 mm.

[0230] Table 15 shows the basic structural parameters of the optical imaging lens of Example 8, where the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0231]

[0232] Table 15

[0233] Table 16 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 8, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0234]

[0235]

[0236] Table 16

[0237] Figure 30 The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 31 The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents meridional field curvature and sagittal field curvature. Figure 32The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude values corresponding to different field angles.

[0238] according to Figures 30 to 32 It can be seen that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0239] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0240]

[0241]

[0242] Table 17

[0243] Table 18 shows the effective focal length f of the optical imaging lenses of Examples 1 to 8, the effective focal lengths f1 to f8 of each lens, etc.

[0244] Parameters / Examples 1 2 3 4 5 6 7 8 f1(mm) 14.98 17.03 22.35 22.52 24.74 29.75 52.97 89.15 f2(mm) -188.17 -142.98 197.75 157.95 397.65 3065.32 234.47 109.60 f3(mm) 7.26 6.33 6.04 6.09 5.86 5.48 5.16 5.18 f4(mm) -12.00 -11.17 -10.60 -10.65 -10.46 -10.57 -11.51 -11.78 f5(mm) 5.95 5.93 6.06 6.05 6.05 6.00 6.62 7.29 f6(mm) -11.60 -10.92 -10.58 -10.60 -10.26 -9.34 -8.36 -8.69 f7(mm) 7.95 7.44 7.80 7.82 7.79 7.72 6.96 7.05 f8(mm) -4.11 -3.90 -4.07 -4.07 -4.08 -4.01 -4.04 -4.30 f(mm) 5.03 5.03 5.03 5.03 5.15 5.18 5.18 5.24 TTL(mm) 7.90 7.49 7.43 7.43 7.45 7.49 7.54 7.60 ImgH(mm) 4.23 4.21 4.19 4.19 4.33 4.36 4.36 4.41 Semi-FOV(°) 39.5 39.5 39.5 39.5 39.3 39.3 39.3 39.3 f / EPD 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20

[0245] Table 18

[0246] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0247] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0248] 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, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0249] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0250] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens is composed of eight lenses with optical power, and the eight lenses with optical power include the following in order from the object side to the image side along the optical axis: a first lens having positive optical power; Second lens; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive refractive power; a sixth lens having negative optical power; a seventh lens having positive refractive power; an eighth lens having negative optical power; The object-side surface of the first lens is concave, and the image-side surface of the first lens is convex; the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; the object-side surface of the third lens is convex, and the image-side surface of the third lens is convex; the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave; the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is convex; the object-side surface of the sixth lens is concave; the object-side surface of the seventh lens is convex; the object-side surface of the eighth lens is concave, and the image-side surface of the eighth lens is concave; At least one of the object-side surface and the image-side surface of the first lens has at least one inflection point; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following relationship: 1.20≤f / EPD<1.3; and the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy the following relationship: -0.84≤f5 / f6≤-0.

51.

2. The optical imaging lens according to claim 1, wherein: Half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies the following: 4.19 mm ≤ ImgH ≤ 4.41 mm; the effective focal length f1 of the first lens, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens satisfy the following: 0.13 ≤ (f7 - f8) / f1 ≤ 0.

81.

3. The optical imaging lens according to claim 1, wherein: The curvature radius R5 of the object-side surface of the third lens, the curvature radius R6 of the image-side surface of the third lens, and the effective focal length f3 of the third lens satisfy the following relationship: -0.77≤(R5+R6) / f3≤-0.

32.

4. The optical imaging lens according to claim 1, wherein: A vertical distance Yc11 from the inflection point on the object-side surface of the first lens to the optical axis and a vertical distance Yc12 from the inflection point on the image-side surface of the first lens to the optical axis satisfy the following relationship: 0.83≤Yc12 / Yc11≤0.

92.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy the following relationship: -0.55≤(R7+R8) / f4≤-0.

42.

6. The optical imaging lens according to claim 1, wherein: A curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, a curvature radius R3 of the object-side surface of the second lens, and a curvature radius R4 of the image-side surface of the second lens satisfy the following relationship: -1.04≤(R1+R2) / (R3+R4)≤-0.

88.

7. The optical imaging lens according to claim 1, wherein: The curvature radius R9 of the object-side surface of the fifth lens, the curvature radius R10 of the image-side surface of the fifth lens, the curvature radius R15 of the object-side surface of the eighth lens, and the curvature radius R16 of the image-side surface of the eighth lens satisfy the following relationship: -0.61≤R10 / R9+R16 / R15≤-0.

41.

8. The optical imaging lens according to claim 1, wherein: A curvature radius R11 of the object-side surface of the sixth lens element and a curvature radius R13 of the object-side surface of the seventh lens element satisfy the following relationship: 0.41≤R11 / (R11-R13)≤0.

61.

9. The optical imaging lens according to claim 1, wherein: The maximum effective radius DT72 of the image-side surface of the seventh lens and the maximum effective radius DT81 of the object-side surface of the eighth lens satisfy the following: 0.26 mm ≤ DT81 - DT72 ≤ 0.43 mm.

10. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first lens and the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy the following: 0.17≤f34 / f12≤0.

97.

11. The optical imaging lens according to claim 1, wherein: A combined focal length f56 of the fifth lens and the sixth lens and a combined focal length f78 of the seventh lens and the eighth lens satisfy the following: -0.93≤f78 / f56≤-0.

52.

12. The optical imaging lens according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy the following: 0.85≤CT3 / (CT1+CT2+CT4)≤1.

15.

13. The optical imaging lens according to claim 1, wherein: A center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy the following: 0.63≤(CT7+CT8) / (CT5+CT6)≤0.

80.

14. The optical imaging lens according to claim 1, wherein: An air interval T45 between the fourth lens and the fifth lens on the optical axis, an air interval T67 between the sixth lens and the seventh lens on the optical axis, and an air interval T78 between the seventh lens and the eighth lens on the optical axis satisfy the following: 0.44≤T45 / (T67+T78)≤0.

56.

15. The optical imaging lens according to claim 1, wherein: A maximum effective radius DT11 of the object-side surface of the first lens and a maximum effective radius DT41 of the object-side surface of the fourth lens satisfy the following relationship: 0.68≤DT41 / DT11≤0.78.

Images