Optical imaging lens

Abstract

The present application discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens, an aperture stop, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. Among them, the first lens has a negative optical power, its object side surface is concave, and its image side surface is convex; the third lens has a positive optical power; the aperture stop is disposed on the image side surface of the first lens. The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.7; the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 0 < R1 / R2 < 1.0; and the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -10.0 < f1 / f < 0.

Description

Technical Field

[0001] This application relates to the field of optical elements, and specifically, to an optical imaging lens. Background Art

[0002] In recent years, with the development of science and technology, mobile phones have become a "standard" for people. People's requirements for mobile phone photography have gradually increased, and high pixels have become a standard configuration for high-end models. At the same time, the size of CCD sensors has gradually increased, requiring the lens to meet conditions such as a large image plane and wide angle to capture more images. At the same time, a large aperture can capture more light, and still be able to take better picture quality in night scenes and darker environments. And currently, the diaphragm position of most imaging lenses is placed in the front, which is not conducive to intercepting stray light, and it is easy to affect the quality of the normal imaging lens due to unreasonable design of the structure and parameters related to the position of the first lens.

[0003] Therefore, it is of great practical significance to provide an optical imaging lens with large image plane, wide angle, large aperture and high imaging quality. Summary of the Invention

[0004] This application provides such an optical imaging lens. The optical imaging lens sequentially includes: a first lens, a diaphragm, 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; wherein, the first lens has a negative focal power, its object side is concave, and its image side is convex; the third lens has a positive focal power; the diaphragm is placed on the image side of the first lens, and the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.7; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: 0 < R1 / R2 < 1.0; and the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -10.0 < f1 / f < 0.

[0005] In one embodiment, the sixth lens has a negative focal power, its object side is concave, and its image side is convex; the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy: 0 < R12 / R11 < 5.0; and the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: -z.0 < f6 / f < 0.

[0006] In one embodiment, the effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, and the curvature radius R2 of the image side of the first lens satisfy: 0.1 < (R1 + R2) / f1 < 0.7.

[0007] It should be noted that there seems to be a mistake in the original text where it says "-z.0 < f6 / f < 0" in the translation of item . It should probably be "-5.0 < f6 / f < 0" as per the original Chinese text.In one embodiment, the object side surface of the second lens is convex, and the image side surface is concave; and the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: 0.5 < R3 / R4 < 1.5.

[0008] In one embodiment, the object side surface of the third lens is convex, and the image side surface is concave; and the radius of curvature R5 of the object side surface of the third lens and the effective focal length f_3 of the third lens satisfy: 0.1 < R5 / f_3 < 0.7.

[0009] In one embodiment, the central thickness of the seventh lens on the optical axis is greater than the central thicknesses of the remaining lenses on the optical axis, and the optical imaging lens satisfies: 2.4 < f_7 / [(T_67 + CT_7 + T_78) / N_7] < 3.4, where f_7 is the effective focal length of the seventh lens, CT_7 is the central thickness of the seventh lens on the optical axis, T_67 is the air gap between the sixth lens and the seventh lens on the optical axis, T_78 is the air gap between the seventh lens and the eighth lens on the optical axis, and N_7 is the refractive index of the seventh lens.

[0010] In one embodiment, the central thickness CT_7 of the seventh lens on the optical axis, the radius of curvature R_13 of the object side surface of the seventh lens, the radius of curvature R_14 of the image side surface of the seventh lens, and the dispersion coefficient V_7 of the seventh lens satisfy: 4.0 < V_7 × CT_7 / (R_13 - R_14) < 8.0.

[0011] In one embodiment, the eighth lens has a negative optical power, and the object side surface is concave; and the radius of curvature R_15 of the object side surface of the eighth lens and the effective focal length f_8 of the eighth lens satisfy: 0.5 < f_8 / R_15 < 1.5.

[0012] In one embodiment, the radius of curvature R_15 of the object side surface of the eighth lens, and the axial distance SAG_81 between the intersection point of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens satisfy: 0.3 < SAG_81 / R_15 < 1.0.

[0013] In one embodiment, the central thickness CT_1 of the first lens on the optical axis, the edge thickness ET_1 of the first lens, and the maximum effective radius DT_11 of the object side surface of the first lens satisfy: CT_1 < ET_1 and 0.2 < (CT_1 + ET_1) / DT_11 < 0.7.

[0014] In one embodiment, the central thickness CT_2 of the second lens on the optical axis, the central thickness CT_3 of the third lens on the optical axis, the central thickness CT_4 of the fourth lens on the optical axis, and the combined focal length f_234 of the second, third, and fourth lenses satisfy: 0.2 < (CT_2 + CT_3 + CT_4) / f_234 < 0.7.

[0015] In one embodiment, half of the diagonal length of the effective pixel area on the imaging surface ImgH and the maximum effective radius DT82 of the image side surface of the eighth lens satisfy: ImgH>4.8mm and 1.0 <ImgH / DT82<1.5。

[0016] In one embodiment, the center thickness CT4 of the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the effective focal length f4 of the fourth lens satisfy the following: 0.1<(CT4+T45+CT5)×(N4+N5) / |f4|<1.0.

[0017] In one embodiment, the chromatic aberration coefficient V4 of the fourth lens, the chromatic aberration coefficient V5 of the fifth lens, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: 0.5<(V4+V5)×T45 / |(R8-R9)|<2.5.

[0018] In one embodiment, the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens, the on-axis distance SAG72 between the intersection of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, the center thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the refractive index N6 of the sixth lens and the refractive index N7 of the seventh lens satisfy: -19.0<(SAG62+SAG72)×(N6+N7) / (CT6+T67)<-14.0.

[0019] In one embodiment, an air interval T78 on the optical axis between the seventh lens and the eighth lens, an air interval T56 on the optical axis between the fifth lens and the sixth lens, a sum ∑AT of air intervals on the optical axis between any two adjacent lenses among the first lens to the eighth lens, and an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the eighth lens satisfy the following conditions: T78>T56 and 0.1<∑AT / TD<0.5.

[0020] In one embodiment, the seventh lens element has positive refractive power, and its object-side surface and image-side surface are convex.

[0021] This application proposes an eight-element optical imaging lens. By rationally allocating the focal power and surface shape of some lenses, controlling the ratio of the effective focal length to the entrance pupil diameter of the optical imaging lens, designing the aperture position, and rationally allocating the curvature radii of the object-side and image-side surfaces of the first lens, as well as the contribution of the focal power of the first lens to the focal length of the entire system, the low-order aberrations of the system can be effectively balanced, giving the imaging lens the advantage of a large aperture and increasing luminous flux. At the same time, the aperture helps to block light, reduce stray light after light passes through the first lens, control the light of subsequent lenses to have good imaging quality, easily balance the aberrations of the system, and improve the imaging quality of the system. Controlling the contribution of the focal power of the first lens to the focal length of the entire system can reduce the deflection angle of light, thereby reducing the impact of the first lens position on the imaging performance of the entire system and improving the imaging quality of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0024] Figures 2A to 2D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0025] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0026] Figures 4A to 4D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0027] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0028] 6A to 6D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0029] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0030] Figures 8A to 8D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0031] Figure 91 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0032] 10A to 10D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0033] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0034] 12A to 12D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown;

[0035] Figure 13 1 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0036] 14A to 14D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 7 are shown respectively;

[0037] Figure 15 1 shows a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

[0038] 16A to 16D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 8 are shown respectively;

[0039] Figure 17 1 shows a schematic structural diagram of an optical imaging lens according to Example 9 of the present application;

[0040] 18A to 18D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 9 are shown respectively;

[0041] Figure 19 shows a schematic structural diagram of an optical imaging lens according to Example 10 of the present application; and

[0042] 20A to 20D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 10 are respectively shown. DETAILED DESCRIPTION

[0043] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] 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.

[0045] 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.

[0046] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0047] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0048] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0049] 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 application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] The features, principles and other aspects of the present application are described in detail below.

[0051] An optical imaging lens according to an exemplary embodiment of the present application may include eight lenses having optical power, namely, 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. These eight lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first through eighth lenses may be spaced apart by a distance.

[0052] In an exemplary embodiment, the first lens has negative refractive power, its object-side surface is concave, and its image-side surface is convex; the third lens has positive refractive power.

[0053] In an exemplary embodiment, the optical imaging lens further includes an aperture disposed on the image side of the first lens. The aperture helps to block light, reduce stray light after the light passes through the first lens, and control the light of subsequent lenses to have good imaging quality.

[0054] In an exemplary embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter (EPD) of the optical imaging lens satisfy the following equation: f / EPD<1.7. f / EPD is the F-number of the optical imaging lens; a smaller f / EPD indicates a larger optical aperture and a clearer image.

[0055] In an exemplary embodiment, the curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens satisfy: <R1 / R2<1.0。

[0056] In an exemplary embodiment, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -10.0 <f1 / f<0。

[0057] An optical imaging lens according to an exemplary embodiment of the present application may include, in order from the object side to the image side along the optical axis: a first lens, an aperture stop, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein, the first lens has a negative optical power, its object side surface is concave, and its image side surface is convex; the third lens has a positive optical power; the aperture stop is disposed on the image side surface of the first lens, and the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f / EPD < 1.7, and the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 0 < R1 / R2 < 1.0, and the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -10.0 < f1 / f < 0. By reasonably distributing the optical power and surface shape of some lenses, and at the same time by controlling the ratio of the effective focal length of the optical imaging lens to the entrance pupil diameter, designing the position of the aperture stop, reasonably distributing the radius of curvature of the object side surface and the image side surface of the first lens, and the contribution of the optical power of the first lens to the focal length of the entire system, the low-order aberrations of the system can be effectively balanced, enabling the imaging lens to have the advantage of a large aperture, increasing the light flux; at the same time, the aperture stop helps to block light, reduce the stray light after the light passes through the first lens, control the light of the subsequent lenses to have good imaging quality, easily balance the aberrations of the system, and improve the imaging quality of the system; by controlling the contribution of the optical power of the first lens to the focal length of the entire system, the deflection angle of the light can be reduced, thereby reducing the influence of the position of the first lens on the imaging performance of the entire system and improving the imaging quality of the system.

[0058] In an exemplary embodiment, the sixth lens has a negative optical power, its object side surface is concave, and its image side surface is convex.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < R12 / R11 < 5.0 and -5.0 < f6 / f < 0, where R11 is the radius of curvature of the object side surface of the sixth lens, R12 is the radius of curvature of the image side surface of the sixth lens, f6 is the effective focal length of the sixth lens, and f is the effective focal length of the optical imaging lens. Satisfying 0 < R12 / R11 < 5.0 and -5.0 < f6 / f < 0, by reasonably controlling the ratio of the radius of curvature of the object side surface and the image side surface of the sixth lens within a certain range, and controlling the ratio of the effective focal length of the sixth lens to the system optical power, the deflection angle of the light can be reduced, enabling the system to better achieve the deflection of the optical path.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.1 < (R1 + R2) / f1 < 0.7, where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens. Satisfying 0.1 < (R1 + R2) / f1 < 0.7 and controlling the ratio of the sum of the curvature radii of the object side surface and the image side surface of the first lens to the effective focal length can avoid the problem of increased system tolerance sensitivity caused by excessive concentration of optical power and excessive surface curvature.

[0061] In an exemplary embodiment, the object side surface of the second lens is convex, and the image side surface is concave.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5 < R3 / R4 < 1.5, where R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens. Satisfying 0.5 < R3 / R4 < 1.5 and reasonably distributing the ratio of the curvature radii of the object side surface and the image side surface of the second lens is beneficial to controlling the light ray turning angle and improving the manufacturability of the lens.

[0063] In an exemplary embodiment, the object side surface of the third lens is convex, and the image side surface is concave.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.1 < R5 / f3 < 0.7, where R5 is the curvature radius of the object side surface of the third lens, and f3 is the effective focal length of the third lens. Satisfying 0.1 < R5 / f3 < 0.7 and controlling the ratio of the effective focal length of the third lens and the curvature radius of the object side surface of the third lens can keep the field curvature contribution within a reasonable range to balance the field curvature generated by the subsequent lenses.

[0065] In an exemplary embodiment, the central thickness of the seventh lens on the optical axis is greater than the central thicknesses of the remaining lenses on the optical axis. The optical imaging lens according to the present application may satisfy: 2.4 < f7 / [(T67 + CT7 + T78) / N7] < 3.4, where f7 is the effective focal length of the seventh lens, CT7 is the central thickness of the seventh lens on the optical axis, T67 is the air gap between the sixth lens and the seventh lens on the optical axis, T78 is the air gap between the seventh lens and the eighth lens on the optical axis, and N7 is the refractive index of the seventh lens. Satisfying 2.4 < f7 / [(T67 + CT7 + T78) / N7] < 3.4 and controlling the ratio of the effective focal length and thickness of the seventh lens to the air gaps between the sixth lens, the seventh lens, and the eighth lens can balance the off-axis field curvature of the system and improve the image quality of the edge field of view.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4.0 < V7×CT7 / (R13 - R14) < 8.0, where CT7 is the central thickness of the seventh lens on the optical axis, R13 is the curvature radius of the object side surface of the seventh lens, R14 is the curvature radius of the image side surface of the seventh lens, and V7 is the dispersion coefficient of the seventh lens. Satisfying 4.0 < V7×CT7 / (R13 - R14) < 8.0 and reasonably distributing the ratio of the dispersion coefficient of the seventh lens to the central thickness and the curvature radii of the object side surface and the image side surface is beneficial to controlling the overall chromatic aberration of the system and avoiding color distortion of the image.

[0067] In an exemplary embodiment, the eighth lens has a negative optical power and the object side surface is a concave surface.

[0068] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5 < f8 / R15 < 1.5, where R15 is the curvature radius of the object side surface of the eighth lens and f8 is the effective focal length of the eighth lens. Satisfying 0.5 < f8 / R15 < 1.5 and adjusting the light divergence angle by controlling the ratio of the curvature radius of the object side surface of the eighth lens to the effective focal length can increase the image plane height.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.3 < SAG81 / R15 < 1.0, where R15 is the curvature radius of the object side surface of the eighth lens and SAG81 is the axial distance between the intersection of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens. Satisfying 0.3 < SAG81 / R15 < 1.0 and controlling the axial distance between the curvature radius of the object side surface of the eighth lens and the intersection of the optical axis and the vertex of the effective radius can reduce the lens structure thickness and achieve miniaturization of the overall system.

[0070] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: CT1 < ET1 and 0.2 < (CT1 + ET1) / DT11 < 0.7, where CT1 is the central thickness of the first lens on the optical axis, ET1 is the edge thickness of the first lens, and DT11 is the maximum effective radius of the object side surface of the first lens. Satisfying CT1 < ET1 and 0.2 < (CT1 + ET1) / DT11 < 0.7 and controlling the ratio of the central thickness to the edge thickness of the first lens is beneficial to improving the lens processing manufacturability and reducing the manufacturing difficulty.

[0071] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.2 < (CT2 + CT3 + CT4) / f234 < 0.7, where CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, and f234 is the combined focal length of the second lens, the third lens, and the fourth lens. Satisfying 0.2 < (CT2 + CT3 + CT4) / f234 < 0.7 and controlling the ratio of the central thicknesses of the second lens, the third lens, and the fourth lens to the combined focal length can effectively control the overall length of the entire system and enhance the compactness of the system.

[0072] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: ImgH > 4.8 mm and 1.0 < ImgH / DT82 < 1.5, where ImgH is half of the diagonal length of the effective pixel region on the imaging surface, and DT82 is the maximum effective radius of the image side surface of the eighth lens. Satisfying ImgH > 4.8 mm and 1.0 < ImgH / DT82 < 1.5 and controlling the half image height of the lens and the ratio of the half image height to the effective radius of the image side surface of the eighth lens enables the system to have the characteristic of a large image surface and can match a larger size chip.

[0073] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.1 < (CT4 + T45 + CT5) × (N4 + N5) / |f4| < 1.0, where CT4 is the central thickness of the fourth lens on the optical axis, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, N4 is the refractive index of the fourth lens, N5 is the refractive index of the fifth lens, and f4 is the effective focal length of the fourth lens. Satisfying 0.1 < (CT4 + T45 + CT5) × (N4 + N5) / |f4| < 1.0 and restricting the ratio of the central thicknesses, air gap, refractive indices, and effective focal length of the fourth lens and the fifth lens enables smooth transition of light rays and balances the aberration of the overall system.

[0074] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.5 < (V4 + V5) × T45 / |(R8 - R9)| < 2.5, where V4 is the dispersion coefficient of the fourth lens, V5 is the dispersion coefficient of the fifth lens, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, R8 is the curvature radius of the image side surface of the fourth lens, and R9 is the curvature radius of the object side surface of the fifth lens. Satisfying 0.5 < (V4 + V5) × T45 / |(R8 - R9)| < 2.5 and controlling the ratio of the dispersion coefficients, air gap, and curvature radii on both sides of the fourth lens and the fifth lens is beneficial to balancing the chromatic aberration effect caused by the lens materials.

[0075] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following: -19.0<(SAG62+SAG72)×(N6+N7) / (CT6+T67)<-14.0, wherein SAG62 is the on-axis distance between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens, SAG72 is the on-axis distance between the intersection of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, CT6 is the center thickness of the sixth lens on the optical axis, T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, N6 is the refractive index of the sixth lens, and N7 is the refractive index of the seventh lens. Satisfying -19.0 < (SAG62 + SAG72) × (N6 + N7) / (CT6 + T67) < -14.0, by controlling the on-axis distance between the effective radius vertices of the image-side surfaces of the sixth and seventh lenses, the air gap, and the refractive index ratio, the field curvature caused by the preceding lens is balanced, while the lens structure is more reasonable and has processability.

[0076] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy the following conditions: T78 > T56 and 0.1 < ∑AT / TD < 0.5, where T78 is the air spacing on the optical axis between the seventh and eighth lenses, T56 is the air spacing on the optical axis between the fifth and sixth lenses, ∑AT is the sum of the air spacings on the optical axis between any two adjacent lenses from the first to the eighth lenses, and TD is the on-axis distance from the object-side surface of the first lens to the image-side surface of the eighth lens. By satisfying T78 > T56 and 0.1 < ∑AT / TD < 0.5, the system distortion range can be rationally controlled by allocating air gaps between each lens in the system, resulting in minimal distortion and a compact system.

[0077] In an exemplary embodiment, the seventh lens element has positive optical power, with both its object-side and image-side surfaces being convex. Controlling the sign of the seventh lens's optical power to be positive converges light and balances overall spherical aberration in the system. Having both sides convex facilitates manufacturing.

[0078] In an exemplary embodiment, at least one of the mirror surfaces of each lens in the first lens to the eighth lens is an aspherical mirror surface. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. If the focus is on the resolution quality, all lenses can use aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. The characteristic of a spherical lens is that there is a constant curvature from the center of the lens to the periphery. Aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side and image side of each lens in the first lens to the eighth lens are aspherical mirror surfaces.

[0079] In an exemplary embodiment, the effective focal length f1 of the first lens may be, for example, in the range of -46.0 mm to -15.0 mm, the effective focal length f2 of the second lens may be, for example, in the range of -170.0 mm to 40.0 mm, the effective focal length f3 of the third lens may be, for example, in the range of 5.5 mm to 13.5 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of -33.0 mm to 10.5 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of -388.0 mm to 216.0 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of -18.0 mm to -11.0 mm, the effective focal length f7 of the seventh lens may be, for example, in the range of 5.0 mm to 6.0 mm, and the effective focal length f8 of the eighth lens may be, for example, in the range of -5.0 mm to -4.0 mm. The effective focal length f of the optical imaging lens may be, for example, in the range of 6.7 mm to 6.9 mm. The half image height (ImgH) corresponding to the maximum field of view (FOV) of the optical imaging lens can be, for example, in the range of 4.9 mm to 5.7 mm. The maximum field of view (FOV) of the optical imaging lens can be, for example, in the range of 70° to 85°. The distance (TTL) from the object-side surface of the first lens to the imaging plane of the optical imaging lens on the optical axis can be, for example, in the range of 9.7 mm to 11.1 mm.

[0080] In an exemplary embodiment, the optical imaging lens according to the present application further includes a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0081] This application proposes an optical imaging lens featuring a large image surface, a large aperture, a wide field of view, and high imaging quality. The optical imaging lens according to the above-described embodiments of this application can utilize multiple lenses, such as the eight lenses described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and on-axis spacing between lenses, incident light can be effectively focused, the overall optical length of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, making the optical imaging lens more amenable to production and processing. 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 can also include other numbers of lenses.

[0082] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following reference Figures 1 to 2D The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0085] 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 and an imaging surface S17.

[0086] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0087] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0088]

[0089]

[0090] Table 1

[0091] 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 x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0092]

[0093] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along 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 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0094] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0771E+00 -9.0693E-02 1.7756E-02 -1.8231E-03 1.1813E-03 -4.8331E-04 2.0525E-04 -8.6875E-05 4.0936E-05 S2 7.2133E-01 -4.9768E-02 3.5753E-03 -7.7004E-04 5.1815E-04 -2.0973E-04 7.6729E-05 -3.4223E-05 -3.3328E-06 S3 -1.4797E-01 1.2641E-02 -2.8143E-03 8.2387E-04 -2.6535E-04 5.3602E-05 -1.4795E-05 1.3427E-05 -5.1032E-06 S4 -7.8828E-01 1.0532E-01 -1.7637E-02 3.3360E-03 -7.6779E-04 4.9864E-04 -1.3312E-04 -7.5596E-06 -5.5381E-05 S5 -8.1255E-01 7.1403E-02 -2.1027E-02 -1.0340E-04 -1.1350E-03 3.9833E-04 -2.8991E-05 -1.7889E-05 -4.0472E-05 S6 -4.5778E-01 5.7512E-02 3.8648E-03 -5.0307E-03 -8.2734E-04 7.1606E-05 1.8970E-04 -6.5498E-05 -8.8669E-06 S7 -1.3153E-01 1.9170E-02 4.5237E-03 -1.0591E-04 4.2353E-05 -1.2331E-04 4.1302E-05 -2.5220E-06 -2.1694E-06 S8 -8.6552E-02 -8.5859E-04 -1.9848E-03 1.9433E-03 5.2293E-04 6.7464E-05 7.6086E-05 -2.5366E-05 3.5290E-06 S9 -1.0512E+00 1.6543E-01 -9.8138E-03 -5.1573E-04 6.5673E-04 -1.7622E-04 2.8179E-04 -5.5662E-05 3.6614E-06 S10 -8.8649E-01 1.2923E-01 -7.0427E-03 1.3000E-04 -1.0444E-05 -3.7890E-04 2.6885E-04 -4.1305E-05 6.1131E-06 S11 8.3040E-01 -2.2879E-01 1.6057E-02 -9.3307E-03 2.5638E-03 -2.1044E-03 1.0099E-03 -1.5774E-04 7.0322E-05 S12 1.8290E+00 -8.4600E-02 7.7824E-02 1.6949E-02 7.1576E-03 -1.5305E-04 2.6953E-03 -7.0015E-04 4.7346E-04 S13 -7.6266E-01 1.2893E-01 -1.3489E-02 1.8179E-02 -1.1917E-03 8.7142E-04 -2.6403E-04 -3.6126E-05 -9.5923E-06 S14 -2.4061E-01 -8.9607E-02 3.6432E-03 5.0121E-03 4.2324E-03 3.3075E-04 -3.1753E-04 -3.4414E-04 -1.4908E-04 S15 -8.0441E-01 7.0866E-03 -4.3353E-02 -5.8607E-03 -4.1287E-03 -1.8350E-03 -5.9613E-04 -3.1060E-04 -1.1845E-04 S16 -5.6599E+00 5.0274E-01 -2.0061E-01 9.3108E-02 -2.2250E-02 2.5127E-02 -4.3650E-03 7.1897E-05 -3.2634E-03

[0095] Table 2

[0096] Table 3 shows the values ​​of parameters such as the effective focal length f of the optical imaging lens in Example 1, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0097]

[0098]

[0099] Table 3

[0100] Figure 2A 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 passing through the lens. Figure 2B 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 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 2A to 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0101] Example 2

[0102] The following reference Figures 3 to 4D The optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0103] like Figure 3 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 and an imaging surface S17.

[0104] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0105] Table 4 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Table 5 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0106]

[0107]

[0108] Table 4

[0109] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0487E+00 -9.1173E-02 1.6144E-02 -1.5374E-03 8.1233E-04 -3.7560E-04 1.5343E-04 -3.7515E-05 4.2829E-05 S2 7.1533E-01 -4.8768E-02 2.8690E-03 -4.3946E-04 2.9184E-04 -8.0706E-05 4.6928E-05 -1.1447E-05 -4.1147E-06 S3 -1.4171E-01 1.1598E-02 -2.6516E-03 9.0333E-04 -3.1325E-04 9.8955E-05 -3.8419E-05 5.0726E-06 -1.1244E-05 S4 -7.7319E-01 1.0270E-01 -1.7030E-02 3.2933E-03 -7.2206E-04 5.0342E-04 -1.9041E-04 -9.3540E-06 -4.0040E-05 S5 -8.0588E-01 7.2015E-02 -2.0527E-02 -1.4099E-04 -1.1073E-03 4.6818E-04 -1.1658E-04 -1.1160E-05 -1.6548E-05 S6 -4.5993E-01 5.8365E-02 3.4480E-03 -4.8776E-03 -8.3763E-04 1.4510E-04 8.7266E-05 -6.7021E-05 2.0298E-05 S7 -1.3241E-01 1.9631E-02 4.2176E-03 -8.7482E-06 1.1810E-05 -9.9086E-05 4.4538E-05 -8.6671E-06 -2.1069E-06 S8 -8.6531E-02 -6.0855E-04 -2.0240E-03 2.0093E-03 4.5059E-04 1.3772E-05 1.0181E-04 -8.6649E-06 1.0322E-05 S9 -1.0490E+00 1.6424E-01 -9.2414E-03 -6.6404E-04 7.2209E-04 -2.2820E-04 2.9115E-04 -5.6495E-05 2.1393E-06 S10 -8.8747E-01 1.2831E-01 -6.4987E-03 -1.1292E-04 6.4828E-05 -3.8835E-04 2.7293E-04 -4.7385E-05 3.1691E-06 S11 8.2552E-01 -2.2751E-01 1.5341E-02 -9.2056E-03 2.4151E-03 -2.0030E-03 1.0247E-03 -1.4370E-04 7.7378E-05 S12 1.8396E+00 -7.8486E-02 7.9379E-02 1.8470E-02 7.4525E-03 2.7529E-04 2.7897E-03 -6.5083E-04 5.2559E-04 S13 -7.7725E-01 1.2965E-01 -1.3217E-02 1.7996E-02 -1.0686E-03 8.4005E-04 -2.1837E-04 -5.1905E-05 -1.8761E-05 S14 -2.6566E-01 -8.8713E-02 4.0895E-03 5.0541E-03 4.3511E-03 2.5016E-04 -3.0497E-04 -3.6540E-04 -1.6303E-04 S15 -8.8495E-01 4.9934E-03 -4.9789E-02 -6.7095E-03 -4.9280E-03 -2.2055E-03 -6.8999E-04 -3.7682E-04 -1.4369E-04 S16 -5.8502E+00 5.5510E-01 -2.1801E-01 9.8309E-02 -2.6418E-02 2.7865E-02 -4.6215E-03 6.5820E-04 -3.6559E-03

[0110] Table 5

[0111] Table 6 shows parameters such as the effective focal length f of the optical imaging lens in Example 2, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0112] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.84 9.80 5.60 80.00 1.60 4.85 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.53 -0.45 -1.31 -2.53 2.33 4.39

[0113] Table 6

[0114] Figure 4AThe 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 passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0115] Example 3

[0116] The following reference Figures 5 to 6D An optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0117] 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 and an imaging surface S17.

[0118] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0119] Table 7 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0120]

[0121] Table 7

[0122]

[0123]

[0124] Table 8

[0125] Table 9 lists parameters such as the effective focal length f of the optical imaging lens in Example 3, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0126] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.84 9.80 4.92 72.00 1.40 4.75 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.65 -0.47 -1.32 -2.17 2.64 3.99

[0127] Table 9

[0128] Figure 6A 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 passing through the lens. Figure 6B 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 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6D The chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 6A to 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0129] Example 4

[0130] The following reference Figures 7 to 8D An optical imaging lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0131] like Figure 7 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 and an imaging surface S17.

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

[0133] Table 10 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Table 11 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0134]

[0135] Table 10

[0136]

[0137]

[0138] Table 11

[0139] Table 12 lists parameters such as the effective focal length f of the optical imaging lens in Example 4, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0140] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.83 11.00 5.57 80.00 1.40 4.96 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 1.05 -0.43 -1.56 -2.12 2.80 4.20

[0141] Table 12

[0142] Figure 8A 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 passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8DThe chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8A to 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0143] Example 5

[0144] The following reference Figures 9 to 10D An optical imaging lens according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0145] 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 and an imaging surface S17.

[0146] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0147] Table 13 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0148]

[0149] Table 13

[0150] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.1076E+00 -9.4942E-02 1.8631E-02 -1.9709E-03 1.1112E-03 -4.2065E-04 2.0891E-04 S2 5.9362E-01 -3.8593E-02 3.3275E-03 -9.4021E-04 4.1282E-04 -1.0764E-04 2.4485E-05 S3 -1.6324E-01 1.3075E-02 -2.7611E-03 6.0648E-04 -2.0100E-04 1.3085E-04 -2.9001E-05 S4 -6.8365E-01 8.6527E-02 -1.3474E-02 2.2447E-03 -6.0085E-04 4.4135E-04 -1.2597E-04 S5 -5.8778E-01 5.3293E-02 -8.4133E-03 3.0994E-04 -6.1082E-04 1.8602E-04 -4.7143E-06 S6 -3.4287E-01 2.8420E-02 6.1082E-03 -1.6654E-03 -2.2785E-04 -9.0589E-05 1.0417E-04 S7 -1.2669E-01 1.6642E-02 4.6849E-03 -3.3229E-04 1.2661E-04 -1.5698E-04 5.2836E-05 S8 -5.0314E-02 4.9892E-04 -1.7257E-03 2.0683E-04 2.4120E-04 -1.1075E-04 2.5738E-05 S9 -8.2162E-01 9.9780E-02 -2.7463E-03 -1.3284E-03 7.1801E-04 -3.8995E-04 1.3392E-04 S10 -7.8494E-01 9.9339E-02 -3.6783E-03 -7.7120E-04 6.1342E-04 -5.0481E-04 1.9746E-04 S11 7.6566E-01 -1.8220E-01 1.2608E-02 -6.7937E-03 2.5138E-03 -1.7935E-03 6.2137E-04 S12 1.1919E+00 -8.5163E-02 1.7911E-02 2.2303E-03 2.5705E-03 -1.8661E-03 9.8429E-04 S13 -6.4375E-01 8.6445E-02 -1.6929E-02 1.0205E-02 -1.2119E-03 4.6332E-04 -1.0794E-04 S14 -1.3656E-01 -5.1421E-02 -2.3542E-03 -6.0791E-04 1.0459E-03 2.0258E-04 9.1131E-05 S15 -9.4077E-01 3.2731E-02 -3.6704E-02 8.0230E-04 -1.6483E-03 -3.7473E-05 2.1779E-05 S16 -2.1603E+00 2.6550E-01 -8.2155E-02 2.5866E-02 -8.1098E-03 2.8072E-03 -7.5192E-04

[0151] Table 14-1

[0152]

[0153]

[0154] Table 14-2

[0155] Table 15 lists parameters such as the effective focal length f of the optical imaging lens in Example 5, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0156] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.84 10.00 5.60 80.00 1.40 4.99 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.63 -0.52 -1.37 -2.48 2.66 4.46

[0157] Table 15

[0158] Figure 10A 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 passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 10D The chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0159] Example 6

[0160] The following reference Figures 11 to 12D An optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0161] like Figure 11 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 and an imaging surface S17.

[0162] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0163] Table 16 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 17-1 and 17-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0164]

[0165] Table 16

[0166]

[0167]

[0168] Table 17-1

[0169] Face number A18 A20 A22 A24 A26 A28 A30 S1 7.2219E-06 -9.5683E-06 5.3551E-07 -1.6950E-05 4.9383E-07 3.7799E-06 8.4092E-06 S2 -7.6138E-07 -4.3688E-06 -6.3426E-07 -4.0824E-07 -1.0567E-07 8.8253E-08 8.6668E-08 S3 7.2442E-06 -4.1589E-05 2.2414E-06 -5.3464E-06 9.7038E-06 -9.4769E-06 5.3549E-06 S4 7.7765E-05 1.8170E-05 -1.6681E-04 -2.2541E-04 -1.9438E-04 -9.0656E-05 -3.1054E-05 S5 -4.5671E-04 -1.2648E-04 -1.2150E-04 -6.7185E-05 -5.4002E-05 -1.3549E-05 -3.9102E-06 S6 -2.3244E-04 2.0711E-04 2.2830E-04 1.3455E-04 6.0758E-05 2.8579E-05 1.3540E-05 S7 -2.8347E-05 -3.9467E-05 2.1727E-06 -5.3110E-06 6.0944E-06 -4.8232E-06 2.5451E-06 S8 2.1752E-04 4.0832E-05 -9.4904E-05 -1.2610E-04 -1.0442E-04 -5.3645E-05 -2.3320E-05 S9 -9.8524E-05 1.5848E-06 1.0986E-05 2.1843E-05 1.6632E-05 3.4398E-06 2.1225E-06 S10 -9.7084E-05 1.0449E-05 1.8326E-05 3.0262E-05 3.3488E-05 1.4379E-05 5.9657E-06 S11 -3.0933E-04 3.3204E-05 -4.2596E-05 4.9182E-05 5.3489E-05 4.0465E-05 1.9997E-05 S12 -5.4625E-05 2.4094E-04 9.1978E-05 4.0779E-04 2.4493E-05 -1.3477E-05 -4.8721E-05 S13 -4.7621E-04 -5.1631E-04 -2.6023E-05 7.0639E-04 4.2409E-04 1.8917E-04 -1.9972E-05 S14 -1.6416E-04 -1.7916E-03 -1.8878E-03 -1.0417E-03 -1.7217E-04 1.3324E-04 1.0128E-04 S15 -4.0288E-04 -1.4278E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S16 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0170] Table 17-2

[0171] Table 18 lists parameters such as the effective focal length f of the optical imaging lens in Example 6, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0172] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.82 9.91 5.65 80.00 1.40 5.57 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.54 -0.37 -1.44 -2.63 3.01 4.42

[0173] Table 18

[0174] Figure 12A 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 passing through the lens. Figure 12BThe astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 12D The chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 12A to 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0175] Example 7

[0176] The following reference Figures 13 to 14D An optical imaging lens according to Example 7 of the present application is described. Figure 13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0177] 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 and an imaging surface S17.

[0178] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0179] Table 19 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 20-1 and 20-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 7, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0180]

[0181] Table 19

[0182]

[0183]

[0184] Table 20-1

[0185] Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.4279E-05 3.1174E-05 1.9754E-05 2.3521E-05 2.0379E-05 8.9959E-06 1.0050E-06 S2 -1.8401E-05 -4.5808E-06 -1.4532E-05 -8.9403E-06 -5.9372E-06 6.6917E-06 1.2604E-06 S3 5.1328E-06 -5.8097E-06 1.1615E-07 6.2568E-07 1.6126E-07 -4.3721E-08 -3.4003E-08 S4 -8.4860E-05 -6.8544E-05 -1.3407E-05 -2.0819E-05 -1.5511E-05 -5.1167E-06 -3.7959E-06 S5 1.7917E-05 6.2420E-05 1.0235E-05 -6.9044E-05 -8.7630E-05 -4.8507E-05 -1.5685E-05 S6 -9.8971E-05 1.5325E-04 9.2969E-05 -1.7051E-06 -5.0324E-05 -2.7622E-05 -9.3823E-06 S7 -3.1105E-06 -7.9917E-06 -4.4025E-06 3.6363E-06 1.1626E-06 -7.5852E-07 -1.0345E-06 S8 4.7321E-05 -2.9187E-05 -1.4567E-05 1.2518E-06 8.6442E-07 2.3138E-06 -2.5199E-07 S9 -1.4119E-04 -1.4375E-04 -5.2396E-05 -3.6443E-05 -4.0151E-06 8.7017E-06 9.6324E-06 S10 -1.4526E-04 -8.7617E-05 -1.1498E-05 -1.6960E-05 -3.2835E-06 3.4182E-06 5.2864E-06 S11 -3.4818E-04 1.4288E-04 -1.3064E-05 1.5773E-05 -2.6051E-05 -1.3356E-06 -7.2626E-07 S12 -5.8729E-05 7.8770E-04 -1.4331E-04 1.0664E-04 2.5448E-05 3.6715E-05 -2.9024E-05 S13 4.7981E-05 1.7666E-04 -8.4698E-05 -5.3674E-05 -8.3693E-05 -9.1157E-06 -1.2967E-05 S14 -4.5876E-04 -1.6566E-04 -3.4207E-05 -4.4711E-05 -5.6400E-05 -3.7266E-05 -1.3240E-05 S15 -1.6241E-04 -1.3652E-04 -2.5178E-05 1.8066E-06 6.3390E-06 5.3812E-06 1.5017E-06 S16 1.4725E-04 -5.2703E-06 -1.4888E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0186] Table 20-2

[0187] Table 21 lists parameters such as the effective focal length f of the optical imaging lens in Example 7, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0188]

[0189]

[0190] Table 21

[0191] Figure 14A 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 passing through the lens. Figure 14B 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 14C The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 14D The chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 14A to 14D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0192] Example 8

[0193] The following reference Figures 15 to 16D An optical imaging lens according to Example 8 of the present application is described. Figure 15 A schematic structural diagram of an optical imaging lens according to Example 8 of the present application is shown.

[0194] like Figure 15 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 and an imaging surface S17.

[0195] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0196] Table 22 shows the basic parameters of the optical imaging lens of Example 8, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 23-1 and 23-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 8, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0197]

[0198]

[0199] Table 22

[0200] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0861E+00 -8.7487E-02 1.6985E-02 -3.0441E-03 7.6129E-04 -3.9784E-04 2.3039E-04 S2 7.5001E-01 -5.2333E-02 6.2620E-03 -1.6659E-03 2.3608E-04 -3.9352E-04 -6.8718E-05 S3 -1.2669E-01 4.3221E-03 -2.4286E-03 5.1312E-04 -2.1453E-04 4.9050E-05 -6.7600E-05 S4 -7.5167E-01 1.0562E-01 -1.7817E-02 3.5141E-03 -6.8062E-04 5.9211E-04 -1.2337E-04 S5 -7.9051E-01 6.6031E-02 -1.7416E-02 7.0362E-04 -1.1225E-03 -7.1255E-05 -1.4072E-04 S6 -4.5044E-01 5.5323E-02 3.1124E-03 -4.9626E-03 3.9583E-04 -1.0190E-03 -7.6913E-05 S7 -1.2689E-01 1.7922E-02 4.4376E-03 -6.0314E-04 4.8001E-05 -1.0366E-04 7.2700E-05 S8 -8.9356E-02 1.7758E-03 -3.0319E-03 3.7633E-03 -1.5639E-03 5.9406E-04 6.4296E-05 S9 -1.0505E+00 1.6096E-01 -5.0952E-03 -9.9526E-04 1.0796E-03 -2.9045E-04 -9.9346E-05 S10 -8.8904E-01 1.2729E-01 -6.8311E-03 -1.1915E-03 1.0200E-03 -1.2426E-03 -1.5292E-04 S11 8.0261E-01 -2.1880E-01 9.7251E-03 -6.0113E-03 2.4433E-03 -2.4870E-03 8.4520E-04 S12 1.9035E+00 -5.0617E-02 9.5796E-02 2.4779E-02 1.1470E-02 3.8590E-03 3.5140E-03 S13 -7.4513E-01 1.3268E-01 -1.5231E-02 1.2852E-02 7.8696E-04 2.2391E-03 -7.3113E-04 S14 -2.8638E-01 -7.1918E-02 3.6084E-03 4.2814E-03 4.9922E-03 8.8088E-04 -1.0496E-03 S15 -6.8994E-01 2.0369E-02 -2.8696E-02 -2.0631E-03 -7.7637E-05 -5.6134E-05 -1.9349E-04 S16 -1.9184E+00 1.9982E-01 -6.3507E-02 2.0191E-02 -4.3729E-03 9.2467E-04 -2.9211E-04

[0201] Table 23-1

[0202]

[0203]

[0204] Table 23-2

[0205] Table 24 shows parameters such as the effective focal length f of the optical imaging lens in Example 8, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0206] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.80 9.87 5.57 80.00 1.40 6.00 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.61 -0.45 -1.43 -2.45 2.89 4.35

[0207] Table 24

[0208] Figure 16AThe 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 passing through the lens. Figure 16B The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 16C The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 16D The chromatic aberration curve of the optical imaging lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 16A to 16D It can be seen that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0209] Example 9

[0210] The following reference Figures 17 to 18D An optical imaging lens according to Example 9 of the present application is described. Figure 17 A schematic structural diagram of an optical imaging lens according to Example 9 of the present application is shown.

[0211] 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 and an imaging surface S17.

[0212] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being convex. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0213] Table 25 shows the basic parameters of the optical imaging lens of Example 9, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 26-1 and 26-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 9, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0214]

[0215] Table 25

[0216] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0823E+00 -9.0584E-02 1.8282E-02 -2.7109E-03 1.2756E-03 -5.3145E-04 1.6613E-04 S2 7.4876E-01 -5.4087E-02 5.9608E-03 -1.6593E-03 7.5905E-04 -2.2599E-04 1.0815E-04 S3 -1.2494E-01 1.0209E-02 -1.7281E-03 5.9390E-04 -1.3943E-04 6.7418E-05 -8.6424E-06 S4 -7.5297E-01 9.7958E-02 -1.5249E-02 3.9599E-03 -7.9375E-04 3.8955E-04 -3.9013E-04 S5 -7.8638E-01 6.9885E-02 -1.8560E-02 -5.9479E-04 -8.4628E-04 3.7941E-04 -2.5567E-04 S6 -4.5666E-01 5.6321E-02 3.9077E-03 -5.3494E-03 -6.4878E-05 -9.7745E-05 -1.7868E-04 S7 -1.2890E-01 1.7954E-02 5.1993E-03 5.3663E-05 1.2114E-04 -8.9689E-05 6.7770E-05 S8 -8.7110E-02 -1.0705E-03 -2.8108E-03 3.0372E-03 5.0264E-04 -7.9054E-06 6.5164E-05 S9 -1.0490E+00 1.6053E-01 -7.7690E-03 -7.1301E-04 1.3067E-03 -4.8371E-04 4.4299E-04 S10 -8.8943E-01 1.2924E-01 -6.0296E-03 -7.7001E-04 3.0968E-04 -8.5474E-04 3.4897E-04 S11 8.0166E-01 -2.2161E-01 1.1425E-02 -8.0107E-03 2.2492E-03 -1.5618E-03 1.1388E-03 S12 1.9001E+00 -4.6322E-02 9.4132E-02 2.6071E-02 1.1318E-02 2.9655E-03 3.8216E-03 S13 -7.4535E-01 1.2487E-01 -1.2120E-02 1.6475E-02 -4.5390E-04 1.0088E-03 -5.2707E-04 S14 -2.7258E-01 -7.0957E-02 6.7981E-04 4.2804E-03 4.5779E-03 8.0321E-04 -3.8111E-04 S15 -4.9711E-01 4.7233E-02 -2.4881E-02 7.1235E-04 -8.4537E-04 -2.0866E-04 -2.5384E-05 S16 -1.8856E+00 2.0407E-01 -6.8125E-02 2.3596E-02 -6.7152E-03 2.2213E-03 -7.5579E-04

[0217] Table 26-1

[0218]

[0219]

[0220] Table 26-2

[0221] Table 27 shows parameters such as the effective focal length f of the optical imaging lens in Example 9, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0222] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.85 9.79 5.61 80.00 1.40 5.25 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.63 -0.45 -1.34 -2.54 2.95 4.37

[0223] Table 27

[0224] Figure 18A The axial chromatic aberration curve of the optical imaging lens of Example 9 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 18B The astigmatism curve of the optical imaging lens of Example 9 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 18C The distortion curve of the optical imaging lens of Example 9 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 18D The chromatic aberration curve of the optical imaging lens of Example 9 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 18A to 18D It can be seen that the optical imaging lens provided in Example 9 can achieve good imaging quality.

[0225] Example 10

[0226] The following reference Figures 19 to 20D An optical imaging lens according to Example 10 of the present application is described. Figure 19 A schematic structural diagram of an optical imaging lens according to Example 10 of the present application is shown.

[0227] like Figure 19 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 and an imaging surface S17.

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

[0229] Table 28 shows the basic parameters of the optical imaging lens of Example 10, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 29-1 and 29-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 10, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1 above.

[0230]

[0231] Table 28

[0232]

[0233]

[0234] Table 29-1

[0235] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.1271E-05 4.9529E-05 6.1298E-06 -2.6153E-06 8.4648E-06 8.4249E-06 5.4319E-06 S2 -2.0087E-05 2.5972E-05 9.3820E-06 1.1322E-05 -4.9004E-06 5.4980E-06 -4.0921E-06 S3 3.4793E-06 -1.5941E-06 2.6457E-06 1.4818E-06 -7.6295E-07 -1.8250E-06 2.3038E-06 S4 -1.6227E-05 2.8798E-05 4.3050E-05 5.2277E-05 1.7026E-05 4.8501E-06 -1.1096E-05 S5 -3.3698E-05 7.2882E-05 1.0495E-04 1.1997E-04 8.7848E-05 5.1361E-05 1.5038E-05 S6 -4.5217E-05 -5.1214E-05 -1.1851E-04 -8.7231E-05 -4.6777E-05 -1.6319E-05 -7.7235E-06 S7 -1.3853E-06 2.9922E-06 -1.0993E-07 2.0117E-06 -1.8647E-06 4.3283E-07 1.5924E-06 S8 -2.1934E-04 -6.6975E-05 8.8973E-05 1.0140E-04 8.0191E-05 3.4263E-05 1.4967E-05 S9 -1.7178E-04 -1.9848E-04 -1.8099E-05 -9.0482E-06 8.8106E-06 -1.1893E-06 5.6411E-06 S10 -2.5501E-06 -3.9743E-05 -1.7026E-05 -7.2783E-09 -7.2570E-06 9.7880E-07 -7.3222E-06 S11 -1.5162E-04 1.3468E-04 -1.8743E-05 1.7762E-05 -1.0296E-05 -1.3786E-06 8.4567E-06 S12 1.6650E-06 7.0857E-04 -7.8373E-05 6.3553E-05 5.5532E-06 6.3382E-05 -3.9698E-06 S13 1.8169E-04 3.6841E-04 1.5531E-04 1.0687E-04 -2.5385E-05 1.1950E-05 -6.3668E-06 S14 -7.7288E-04 -5.0732E-05 1.1677E-04 1.4622E-04 -3.0382E-05 -4.3884E-05 -5.7176E-05 S15 -6.4610E-05 -1.0166E-04 -3.4245E-07 1.8913E-05 1.9367E-05 1.4200E-05 7.4837E-06 S16 5.4469E-05 -2.2095E-06 -6.6091E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0236] Table 29-2

[0237] Table 30 shows parameters such as the effective focal length f of the optical imaging lens in Example 10, the distance TTL from the object-side surface of the first lens element of the optical imaging lens to the imaging plane on the optical axis, half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens ImgH, and the maximum field of view FOV of the optical imaging lens.

[0238] parameter f(mm) TTL(mm) ImgH(mm) FOV(°) f / EPD f234(mm) Numerical 6.82 9.87 5.60 80.00 1.45 4.95 parameter ET1(mm) SAG62(mm) SAG72(mm) SAG81(mm) DT11(mm) DT82(mm) Numerical 0.60 -0.47 -1.35 -2.53 2.86 4.43

[0239] Table 30

[0240] Figure 20A The axial chromatic aberration curve of the optical imaging lens of Example 10 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 20BThe astigmatism curve of the optical imaging lens of Example 10 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 20C The distortion curve of the optical imaging lens of Example 10 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 20D The chromatic aberration curve of the optical imaging lens of Example 10 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. 20A to 20D It can be seen that the optical imaging lens provided in Example 10 can achieve good imaging quality.

[0241] In summary, Examples 1 to 10 respectively satisfy the relationships shown in Table 31.

[0242]

[0243] Table 31

[0244] 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.

[0245] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: The optical system includes, from the object side to the image side, a first lens, an aperture, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has negative optical power, its object side surface is concave, and its image side surface is convex; The object side surface of the second lens is convex, and the image side surface is concave; The third lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The sixth lens has negative optical power, its object side surface is concave, and its image side surface is convex; The seventh lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex; The eighth lens has negative optical power and a concave object-side surface; The second lens has positive refractive power, and at least one of the fourth lens and the fifth lens has positive refractive power; or the second lens has negative refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power; The number of lenses having optical power in the optical imaging lens is eight; The effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following conditions: 1.40≤f / EPD≤1.60; The aperture is placed on the image side of the first lens; The curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens satisfy: 0.65≤R1 / R2≤0.86; and The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy the following: -6.72≤f1 / f≤-2.

22.

2. The optical imaging lens according to claim 1, wherein: A curvature radius R11 of the object-side surface of the sixth lens and a curvature radius R12 of the image-side surface of the sixth lens satisfy: 1.32≤R12 / R11≤1.43; and The effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy the following: -2.52≤f6 / f≤-1.

70.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the curvature radius R1 of the object-side surface of the first lens, and the curvature radius R2 of the image-side surface of the first lens satisfy: 0.17≤(R1+R2) / f1≤0.

59.

4. The optical imaging lens according to claim 1, wherein: 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: 0.74≤R3 / R4≤1.

10.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R5 of the object-side surface of the third lens and an effective focal length f3 of the third lens satisfy the following: 0.26≤R5 / f3≤0.

62.

6. The optical imaging lens according to claim 1, wherein: The center thickness of the seventh lens on the optical axis is greater than the center thickness of the remaining lenses on the optical axis, and The optical imaging lens satisfies: 2.54 ≤ f7 / [(T67 + CT7 + T78) / N7] ≤ 3.10, where f7 is the effective focal length of the seventh lens, CT7 is the central thickness of the seventh lens on the optical axis, T67 is the air gap between the sixth lens and the seventh lens on the optical axis, T78 is the air gap between the seventh lens and the eighth lens on the optical axis, and N7 is the refractive index of the seventh lens.

7. The optical imaging lens according to claim 1, wherein: The central thickness CT7 of the seventh lens on the optical axis, the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, and the dispersion coefficient V7 of the seventh lens satisfy: 4.45 ≤ V7×CT7 / (R13 - R14) ≤ 7.

28.

8. The optical imaging lens according to claim 1, wherein The curvature radius R15 of the object side surface of the eighth lens and the effective focal length f8 of the eighth lens satisfy: 0.98 ≤ f8 / R15 ≤ 1.

31.

9. The optical imaging lens according to claim 1, wherein: The curvature radius R15 of the object side surface of the eighth lens, the axial distance SAG81 between the intersection point of the object side surface of the eighth lens and the optical axis and the vertex of the effective radius of the object side surface of the eighth lens satisfy: 0.50 ≤ SAG81 / R15 ≤ 0.

74.

10. The optical imaging lens according to claim 1, wherein: The central thickness CT1 of the first lens on the optical axis, the edge thickness ET1 of the first lens, and the maximum effective radius DT11 of the object side surface of the first lens satisfy: CT1 < ET1 and 0.28 ≤ (CT1 + ET1) / DT11 ≤ 0.

60.

11. The optical imaging lens according to any one of claims 1 to 10, wherein: The central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the combined focal length f234 of the second lens, the third lens, and the fourth lens satisfy: 0.40 ≤ (CT2 + CT3 + CT4) / f234 ≤ 0.

59.

12. The optical imaging lens according to any one of claims 1 to 10, wherein: Half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens and the maximum effective radius DT82 of the image side surface of the eighth lens satisfy: 5.65 mm ≥ ImgH > 4.8 mm and 1.23 ≤ ImgH / DT82 ≤ 1.

33.

13. The optical imaging lens according to any one of claims 1 to 10, wherein: The center thickness CT4 of the fourth lens on the optical axis, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the effective focal length f4 of the fourth lens satisfy the following conditions: 0.1<(CT4+T45+CT5)×(N4+N5) / f4 ≤0.

76.

14. The optical imaging lens according to any one of claims 1 to 10, wherein: The Abbe coefficient V4 of the fourth lens, the Abbe coefficient V5 of the fifth lens, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy: 0.60≤(V4+V5)×T45 / (R8-R9) ≤2.

20.

15. The optical imaging lens according to any one of claims 1 to 10, wherein: The axial distance SAG62 between the intersection point of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens, the axial distance SAG72 between the intersection point of the image side surface of the seventh lens and the optical axis and the vertex of the effective radius of the image side surface of the seventh lens, the central thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the refractive index N6 of the sixth lens, and the refractive index N7 of the seventh lens satisfy: -18.41 ≤ (SAG62 + SAG72)×(N6 + N7) / (CT6 + T67) ≤ -14.

17.

16. The optical imaging lens according to any one of claims 1 to 10, wherein: An air gap T78 between the seventh lens and the eighth lens on the optical axis, an air gap T56 between the fifth lens and the sixth lens on the optical axis, a sum ∑AT of the air gaps on the optical axis between any two adjacent lenses from the first lens to the eighth lens, and an on-axis distance TD from the object side surface of the first lens to the image side surface of the eighth lens satisfy the following conditions: T78>T56 and 0.33≤∑AT / TD≤0.43.

Images