Optical imaging lens set

Abstract

The present invention provides an optical imaging lens group, which only has seven lenses and sequentially includes, from the object side to the image side of the optical imaging lens group: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.6 < TTL / ImgH - f / f4 < 0.9; the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy: -0.4 < R14 / f7 < 0; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 0.5 < |R2 / R7| < 3.0. The present invention solves at least one of the problems in the prior art that it is difficult to miniaturize the optical imaging lens group, the lens processing and forming is difficult, and the imaging quality is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical imaging lens group. Background Art

[0002] As users' requirements for the aesthetics of mobile phones are getting higher and higher, mobile phones are developing towards being thinner and lighter, which also requires the optical imaging lens group carried thereon to develop towards miniaturization to adapt to the thinner and lighter mobile phones. At the same time, users' requirements for the photographing performance of mobile phones are getting higher and higher, resulting in an increasing number of lenses used in the optical imaging lens group, leading to a higher risk of aberration and greatly reducing the imaging quality. The increase in the number of lenses also increases the number of sensitive lenses, and sensitive lenses are prone to problems such as poor processing and assembly, thus affecting the imaging quality of the optical imaging lens group.

[0003] That is to say, in the prior art, the optical imaging lens group has at least one of the problems of being difficult to miniaturize, difficult to process and form lenses, and poor imaging quality. Summary of the Invention

[0004] The main object of the present invention is to provide an optical imaging lens group to solve at least one of the problems of being difficult to miniaturize, difficult to process and form lenses, and poor imaging quality in the prior art optical imaging lens group.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens group, which only has seven lenses, and successively includes from the object side to the image side of the optical imaging lens group: a first lens, the focal length symbol of the first lens is positive; a second lens, the focal length symbol of the second lens is negative; a third lens, the focal length symbol of the third lens is negative; a fourth lens, the focal length symbol of the fourth lens is positive; a fifth lens, the focal length symbol of the fifth lens is negative; a sixth lens, the focal length symbol of the sixth lens is positive; a seventh lens, the focal length symbol of the seventh lens is negative; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half ImgH of the diagonal length of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.6 < TTL / ImgH - f / f4 < 0.9; the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy: -0.4 < R14 / f7 < 0; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 0.5 < |R2 / R7| < 3.0.

[0006] Furthermore, half of the diagonal length of the effective pixel area on the imaging plane ImgH is greater than 6.5 mm, and half of the diagonal length of the effective pixel area on the imaging plane ImgH and the effective focal length f of the optical imaging lens group satisfy: ImgH / f>1.0.

[0007] Furthermore, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side of the seventh lens satisfy the following conditions: 0.3 <T45 / R9+T56 / R11+T67 / R13<1.0。

[0008] Furthermore, the dispersion coefficient V1 of the first lens, the effective focal length f1 of the first lens, the dispersion coefficient V2 of the second lens, and the effective focal length f2 of the second lens satisfy the following conditions: 6.0 <V1 / f1+V2 / f2<10.0。

[0009] Furthermore, the refractive index N1 of the first lens, the center thickness CT1 of the first lens, the refractive index N2 of the second lens, and the center thickness CT2 of the second lens satisfy: 5.0 <N1 / CT1+N2 / CT2<10.0。

[0010] Furthermore, the center thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side of the fifth lens, the center thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side of the sixth lens, the center thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side of the seventh lens satisfy the following conditions: 0.1 <CT5 / DT51+CT6 / DT61+CT7 / DT71<1.0。

[0011] Furthermore, the sum of the center thickness of the first lens and the center thickness of the second lens is greater than the sum of the center thickness of the sixth lens and the center thickness of the seventh lens, and the center thickness CT1 of the first lens, the center thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the center thickness CT6 of the sixth lens, the center thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5<(CT1+CT2)*10 / f12+(CT6+CT7)*10 / f67<1.5.

[0012] Furthermore, the effective focal length f1 of the first lens satisfies: |f1|<|fi|, and the effective focal length f6 of the sixth lens satisfies: |f6|<|fi|, where fi is the effective focal length of the i-th lens, and i is 2, 3, 4, or 5.

[0013] Further, the refractive index N3 of the third lens, the radius of curvature R6 of the image side of the third lens, the refractive index N4 of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: 0 < N3 / R6 - N4 / R8 < 0.5.

[0014] Further, the edge thickness ETi and the center thickness CTi of the i-th lens satisfy: 0.1 < ETi / CTi < 3.0, where i takes values from 1, 2, 3, 4, 5, 6, 7.

[0015] Further, the ratio of the edge thickness to the center thickness of the first lens is less than the ratio of the edge thickness to the center thickness of the remaining lenses of the optical imaging lens group. The edge thickness ET5 and the center thickness CT5 of the fifth lens satisfy: ET5 / CT5 > 0.8, and the center thickness CT7 and the edge thickness ET7 of the seventh lens satisfy: ET7 / CT7 > 1.0.

[0016] Further, the effective focal length f3 of the third lens, the maximum effective radius DT32 of the image side of the third lens, the effective focal length f4 of the fourth lens, the maximum effective radius DT42 of the image side of the fourth lens, the effective focal length f5 of the fifth lens, and the maximum effective radius DT52 of the image side of the fifth lens satisfy: -6.0 < (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 < -3.0.

[0017] Further, the absolute value of the radius of curvature R14 of the image side of the seventh lens is less than 2, and the radius of curvature of the image side of the seventh lens is less than the absolute value of the radius of curvature of the object side or the image side of the lenses of the remaining optical imaging lens group.

[0018] Further, the center thickness CT3 of the third lens, the air gap T34 on the optical axis of the optical imaging lens group between the third lens and the fourth lens, the radius of curvature R5 of the object side of the third lens, the radius of curvature R6 of the image side of the third lens, the center thickness CT4 of the fourth lens, the air gap T34 on the optical axis between the third lens and the fourth lens, the radius of curvature R7 of the object side of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: -0.5 < (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) < 1.5.

[0019] Further, the distance T14 on the optical axis from the object side of the first lens to the image side of the fourth lens in the optical imaging lens group, the combined focal length f1234 of the first lens to the fourth lens, the distance T57 on the optical axis from the object side of the fifth lens to the image side of the seventh lens, and the combined focal length f567 of the fifth lens to the seventh lens satisfy:

[0020] Furthermore, the axial distance SAG52 from the intersection point of the image side surface of the fifth lens and the optical axis of the optical imaging lens group to the vertex of the effective radius of the image side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the axial distance SAG62 from the intersection point of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, the axial distance SAG72 from the intersection point of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens, and the radius of curvature R14 of the image side surface of the seventh lens satisfy: -1.0 < SAG52 / R10 + SAG62 / R12 + SAG72 / R14 < 0.

[0021] Furthermore, when the absolute value of the effective focal length of the i-th lens is less than 10, it satisfies: -2.0 < fi / f < 1.5, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i takes values from 1, 2, 3, 4, 5, 6, 7.

[0022] Furthermore, the object side surface of the first lens is convex, the object side surface of the second lens is convex, the image side surface of the second lens is concave, the object side surface of the third lens is convex, the image side surface of the third lens is concave, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0023] Furthermore, the object side surface of the fifth lens is convex, the image side surface of the fifth lens is concave, the object side surface of the sixth lens is convex, the image side surface of the sixth lens is concave, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave.

[0024] Furthermore, the material of the first lens is glass.

[0025] Furthermore, the radius of curvature R7 of the object side surface of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: -3.5 < R7 / R8 < 0; the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: 0 < R6 / R5 < 0.6.

[0026] Furthermore, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: -1.17 < f1 / f7 < 0.1; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: 0.5 < f / f1 < 1.0.

[0027] According to another aspect of the present invention, an optical imaging lens group is provided. The optical imaging lens group has only seven lenses, which sequentially include, from the object side to the image side of the optical imaging lens group: a first lens with a positive focal length sign; a second lens with a negative focal length sign; a third lens with a negative focal length sign; a fourth lens with a positive focal length sign; a fifth lens with a negative focal length sign; a sixth lens with a positive focal length sign; a seventh lens with a negative focal length sign. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half of the diagonal length ImgH of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.6 < TTL / ImgH - f / f4 < 0.9; half of the diagonal length ImgH of the effective pixel area on the imaging surface is greater than 6.5 mm, and half of the diagonal length ImgH of the effective pixel area on the imaging surface and the effective focal length f of the optical imaging lens group satisfy: ImgH / f > 1.0.

[0028] Further, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side surface of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side surface of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side surface of the seventh lens satisfy: 0.3 < T45 / R9 + T56 / R11 + T67 / R13 < 1.0. [[ID=*]] [[ID=*]]

[0029] Further, the dispersion coefficient V1 of the first lens, the effective focal length f1 of the first lens, the dispersion coefficient V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 6.0 < V1 / f1 + V2 / f2 < 10.0.

[0030] Further, the refractive index N1 of the first lens, the central thickness CT1 of the first lens, the refractive index N2 of the second lens, and the central thickness CT2 of the second lens satisfy: 5.0 < N1 / CT1 + N2 / CT2 < 10.0.

[0031] Further, the central thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side surface of the fifth lens, the central thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side surface of the sixth lens, the central thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side surface of the seventh lens satisfy: 0.1 < CT5 / DT51 + CT6 / DT61 + CT7 / DT71 < 1.0.

[0032] Furthermore, the sum of the central thickness of the first lens and the central thickness of the second lens is greater than the sum of the central thickness of the sixth lens and the central thickness of the seventh lens. The central thickness CT1 of the first lens, the central thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the central thickness CT6 of the sixth lens, the central thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5 < (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 < 1.5.

[0033] Furthermore, the effective focal length f1 of the first lens satisfies: |f1| < |fi|, and the effective focal length f6 of the sixth lens satisfies: |f6| < |fi|, where fi is the effective focal length of the i-th lens, and i takes values of 2, 3, 4, 5.

[0034] Furthermore, the refractive index N3 of the third lens, the radius of curvature R6 of the image side of the third lens, the refractive index N4 of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: 0 < N3 / R6 - N4 / R8 < 0.5.

[0035] Furthermore, the edge thickness ETi and the central thickness CTi of the i-th lens satisfy: 0.1 < ETi / CTi < 3.0, where i takes values from 1, 2, 3, 4, 5, 6, 7.

[0036] Furthermore, the ratio of the edge thickness to the central thickness of the first lens is less than the ratio of the edge thickness to the central thickness of the remaining lenses of the optical imaging lens group. The edge thickness ET5 and the central thickness CT5 of the fifth lens satisfy: ET5 / CT5 > 0.8, and the central thickness CT7 and the edge thickness ET7 of the seventh lens satisfy: ET7 / CT7 > 1.0.

[0037] Furthermore, the effective focal length f3 of the third lens, the maximum effective radius DT32 of the image side of the third lens, the effective focal length f4 of the fourth lens, the maximum effective radius DT42 of the image side of the fourth lens, the effective focal length f5 of the fifth lens, and the maximum effective radius DT52 of the image side of the fifth lens satisfy: -6.0 < (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 < -3.0.

[0038] Furthermore, the absolute value of the radius of curvature R14 of the image side of the seventh lens is less than 2, and the radius of curvature of the image side of the seventh lens is less than the absolute value of the radius of curvature of the object side or the image side of the remaining lenses of the optical imaging lens group.

[0039] Further, the center thickness CT3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the optical imaging lens group, the curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, the center thickness CT4 of the fourth lens, the air gap T34 between the third lens and the fourth lens on the optical axis, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: -0.5 < (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) < 1.5.

[0040] Further, the distance T14 from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis of the optical imaging lens group, the combined focal length f1234 of the first lens to the fourth lens, the distance T57 from the object side surface of the fifth lens to the image side surface of the seventh lens on the optical axis, and the combined focal length f567 of the fifth lens to the seventh lens satisfy: 0 < T14 / f1234 + T57 / f567 < 1.0.

[0041] Further, the axial distance SAG52 from the intersection point of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the axial distance SAG62 from the intersection point of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the axial distance SAG72 from the intersection point of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy: -1.0 < SAG52 / R10 + SAG62 / R12 + SAG72 / R14 < 0.

[0042] Further, when the absolute value of the effective focal length of the i-th lens is less than 10, it satisfies: -2.0 < fi / f < 1.5, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i takes values from 1, 2, 3, 4, 5, 6, 7.

[0043] Further, the object side surface of the first lens is convex, the object side surface of the second lens is convex, the image side surface of the second lens is concave, the object side surface of the third lens is convex, the image side surface of the third lens is concave, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0044] Further, the object side surface of the fifth lens is convex, the image side surface of the fifth lens is concave, the object side surface of the sixth lens is convex, the image side surface of the sixth lens is concave, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave.

[0045] Further, the material of the first lens is glass.

[0046] Furthermore, the following conditions are satisfied between the radius of curvature R7 of the object side surface of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens: -3.5 < R7 / R8 < 0; the following conditions are satisfied between the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens: 0 < R6 / R5 < 0.6.

[0047] Furthermore, the following conditions are satisfied between the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens: -1.17 < f1 / f7 < 0.1; the following conditions are satisfied between the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group: 0.5 < f / f1 < 1.0.

[0048] Applying the technical solution of the present invention, the optical imaging lens group only has seven lenses, which sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side of the optical imaging lens group. The focal length sign of the first lens is positive; the focal length sign of the second lens is negative; the focal length sign of the third lens is negative; the focal length sign of the fourth lens is positive; the focal length sign of the fifth lens is negative; the focal length sign of the sixth lens is positive; the focal length sign of the seventh lens is negative. The following conditions are satisfied among the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half of the diagonal length ImgH of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens: 0.6 < TTL / ImgH - f / f4 < 0.9; the following conditions are satisfied between the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens: -0.4 < R14 / f7 < 0; the following conditions are satisfied between the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R7 of the object side surface of the fourth lens: 0.5 < |R2 / R7| < 3.0.

[0049] Setting the focal length sign of the first lens to be positive and the focal length sign of the second lens to be negative is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the first lens and the second lens cooperate with each other to offset the aberrations generated by each other. Setting the focal length sign of the third lens to be negative and the focal length sign of the fourth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the third lens and the fourth lens cooperate with each other to offset the aberrations generated by each other. Setting the focal length sign of the fifth lens to be negative and the focal length sign of the sixth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the fifth lens and the sixth lens cooperate with each other to offset the aberrations generated by each other. Setting the focal length sign of the seventh lens to be negative can correct the aberrations generated by the first lens to the sixth lens, thereby reducing the overall aberration of the optical imaging lens group and improving the imaging quality. By reasonably distributing the positive and negative focal lengths of each lens, it is possible to avoid large deflections of light rays, control the aberrations, and improve the imaging quality.

[0050] By limiting TTL / ImgH-f / f4 within a reasonable range, the overall length of the optical imaging lens system can be controlled, facilitating miniaturization. This, in turn, rationally distributes the effective focal length of the fourth lens element, facilitating light convergence and further miniaturization. Furthermore, limiting R14 / f7 within a reasonable range controls the surface profile of the seventh lens element, ensuring its workability, facilitating assembly, and reducing the tolerance sensitivity of the optical imaging lens system. Limiting |R2 / R7| within a reasonable range helps control the curvature of the image-side surface of the first lens element and the object-side surface of the fourth lens element, preventing excessive smoothing of the lens surfaces, thereby effectively balancing aberrations and preventing excessive curvature of the lens surfaces. This helps reduce the assembly sensitivity of the first and fourth lenses, improving the assembly stability of the optical imaging lens system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

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

[0053] Figures 2 to 5 Shown respectively Figure 1 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0054] Figure 6 A schematic structural diagram of an optical imaging lens assembly according to Example 2 of the present invention is shown;

[0055] Figures 7 to 10 Shown respectively Figure 6 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0056] Figure 11 A schematic structural diagram of an optical imaging lens assembly according to Example 3 of the present invention is shown;

[0057] Figures 12 to 15 Shown respectively Figure 11 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0058] Figure 16 Schematic diagram of the structure of the optical imaging lens assembly according to Example 4 of the present invention is shown;

[0059] Figures 17 to 20 Shown respectively Figure 16The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0060] Figure 21 A schematic structural diagram of an optical imaging lens assembly according to Example 5 of the present invention is shown;

[0061] Figures 22 to 25 Shown respectively Figure 21 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0062] Figure 26 Schematic diagram showing the structure of an optical imaging lens assembly according to Example 6 of the present invention;

[0063] Figures 27 to 30 Shown respectively Figure 26 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0064] Figure 31 A schematic structural diagram of an optical imaging lens assembly according to Example 7 of the present invention is shown;

[0065] Figures 32 to 35 Shown respectively Figure 31 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group.

[0066] The above drawings include the following reference numerals:

[0067] STO, aperture; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; E7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens; E8, filter; S15, object side surface of the filter; S16, image side surface of the filter; S17, imaging surface. DETAILED DESCRIPTION

[0068] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0069] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0070] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0071] It should be noted that in this specification, the expressions first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0072] 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.

[0073] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens closest to the object side is called the object side surface of the lens, and the surface of each lens closest to the image side is called the image side surface of the lens. The surface shape in the paraxial area can be judged according to the judgment method of common knowledge in this field, using the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value in the lens database (lens data) in optical software) to determine the convexity and concavity. For the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0074] In order to solve at least one of the problems in the prior art of optical imaging lens sets being difficult to miniaturize, difficult to process and shape, and having poor imaging quality, the present invention provides an optical imaging lens set.

[0075] Example 1

[0076] like Figures 1 to 35As shown, the optical imaging lens group only has seven lenses, which successively include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side of the optical imaging lens group. The focal length sign of the first lens is positive; the focal length sign of the second lens is negative; the focal length sign of the third lens is negative; the focal length sign of the fourth lens is positive; the focal length sign of the fifth lens is negative; the focal length sign of the sixth lens is positive; the focal length sign of the seventh lens is negative; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half of the diagonal length ImgH of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.6 < TTL / ImgH - f / f4 < 0.9; the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy: -0.4 < R14 / f7 < 0; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 0.5 < |R2 / R7| < 3.0.

[0077] Setting the focal length sign of the first lens to be positive and the focal length sign of the second lens to be negative is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the first lens and the second lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the third lens to be negative and the focal length sign of the fourth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the third lens and the fourth lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the fifth lens to be negative and the focal length sign of the sixth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the fifth lens and the sixth lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the seventh lens to be negative can correct the aberration generated by the first lens to the sixth lens, thereby reducing the overall aberration of the optical imaging lens group and improving the imaging quality. By reasonably distributing the positive and negative focal lengths of each lens, it is possible to avoid large deflections of light, control the aberration, and improve the imaging quality.

[0078] By limiting TTL / ImgH-f / f4 within a reasonable range, the overall length of the optical imaging lens system can be controlled, facilitating miniaturization. This, in turn, rationally distributes the effective focal length of the fourth lens element, facilitating light convergence and further miniaturization. Furthermore, limiting R14 / f7 within a reasonable range controls the surface profile of the seventh lens element, ensuring its workability, facilitating assembly, and reducing the tolerance sensitivity of the optical imaging lens system. Limiting |R2 / R7| within a reasonable range helps control the curvature of the image-side surface of the first lens element and the object-side surface of the fourth lens element, preventing excessive smoothing of the lens surfaces, thereby effectively balancing aberrations and preventing excessive curvature of the lens surfaces. This helps reduce the assembly sensitivity of the first and fourth lenses, improving the assembly stability of the optical imaging lens system.

[0079] Preferably, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group, half the diagonal length of the effective pixel area on the imaging surface ImgH, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy the following: 0.75≤TTL / ImgH-f / f4≤0.83.

[0080] Preferably, a curvature radius R14 of the image-side surface of the seventh lens and an effective focal length f7 of the seventh lens satisfy the following relationship: -0.31≤R14 / f7≤-0.12.

[0081] Preferably, a curvature radius R2 of the image side surface of the first lens and a curvature radius R7 of the object side surface of the fourth lens satisfy the following relationship: 0.51≤|R2 / R7|≤2.53.

[0082] In this embodiment, half the diagonal length of the effective pixel area on the imaging plane, ImgH, is greater than 6.5 mm. The relationship between half the diagonal length of the effective pixel area on the imaging plane, ImgH, and the effective focal length, f, of the optical imaging lens assembly satisfies the following: ImgH / f>1.0. Since ImgH is greater than 6.5 mm, the optical imaging lens assembly possesses the characteristic of a large image plane. Limiting ImgH / f within a reasonable range ensures this large image plane characteristic, enabling the acquisition of richer information and high-quality imaging when photographing. Furthermore, the effective focal length of the optical imaging lens assembly can be kept relatively small, effectively compressing the total optical length. This facilitates ultra-thinness and miniaturization while ensuring image quality. Preferably, 1.07≤ImgH / f≤1.31.

[0083] In this embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side surface of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side surface of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side surface of the seventh lens satisfy: 0.3 < T45 / R9 + T56 / R11 + T67 / R13 < 1.0. By restricting T45 / R9 + T56 / R11 + T67 / R13 within a reasonable range, it is necessary to ensure the optical power of the fourth lens, the fifth lens, and the sixth lens, thereby restricting the deflection of light rays, avoiding the distance of marginal light rays from the optical axis being too large, and thus effectively reducing the local astigmatism of the optical imaging lens group and improving the imaging quality. Preferably, 0.40 ≤ T45 / R9 + T56 / R11 + T67 / R13 ≤ 0.61.

[0084] In this embodiment, the Abbe number V1 of the first lens, the effective focal length f1 of the first lens, the Abbe number V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 6.0 < V1 / f1 + V2 / f2 < 10.0. By restricting V1 / f1 + V2 / f2 within a reasonable range, the chromatic dispersion of light rays after passing through the first lens and the second lens is restricted, thereby effectively balancing the image-side aberrations of the first lens and the second lens, reasonably distributing the effective focal lengths of the first lens and the second lens, and facilitating the realization of the characteristic of a large image plane. Preferably, 7.68 ≤ V1 / f1 + V2 / f2 ≤ 9.67.

[0085] In this embodiment, the refractive index N1 of the first lens, the central thickness CT1 of the first lens, the refractive index N2 of the second lens, and the central thickness CT2 of the second lens satisfy: 5.0 < N1 / CT1 + N2 / CT2 < 10.0. By restricting N1 / CT1 + N2 / CT2 within a reasonable range, it can be ensured that the first lens is a low-refractive-index material and the second lens is a high-refractive-index material, enabling the first lens and the second lens to cooperate with each other to reduce distortion, thereby reducing aberrations and improving image quality. At the same time, while ensuring the imaging quality, the thicknesses of the first lens and the second lens can be restricted within a reasonable range, which is conducive to miniaturization. Preferably, 5.78 ≤ N1 / CT1 + N2 / CT2 ≤ 7.13.

[0086] In this embodiment, the center thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side surface of the fifth lens, the center thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side surface of the sixth lens, the center thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side surface of the seventh lens satisfy: 0.1 < CT5 / DT51 + CT6 / DT61 + CT7 / DT71 < 1.0. By restricting CT5 / DT51 + CT6 / DT61 + CT7 / DT71 within a reasonable range, the center thickness and edge thickness of the fifth lens, the sixth lens, and the seventh lens can be controlled to meet the requirements of processing and forming. At the same time, the interval range between the fifth lens, the sixth lens, and the seventh lens is relatively reasonable, avoiding interference during the lens assembly process and ensuring the assembly stability. At the same time, the total length of the optical imaging lens group can also be controlled, which is beneficial to achieving miniaturization. Preferably, 0.32 ≤ CT5 / DT51 + CT6 / DT61 + CT7 / DT71 ≤ 0.57.

[0087] In this embodiment, the sum of the center thickness of the first lens and the center thickness of the second lens is greater than the sum of the center thickness of the sixth lens and the center thickness of the seventh lens. The center thickness CT1 of the first lens, the center thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the center thickness CT6 of the sixth lens, the center thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5 < (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 < 1.5. By controlling the sum of the center thickness of the first lens and the center thickness of the second lens to be greater than the sum of the center thickness of the sixth lens and the center thickness of the seventh lens, it is beneficial to achieve a small head. At the same time, by restricting (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 within a reasonable range, the thickness of the first lens and the second lens will not be too thick, and the thickness of the sixth lens and the seventh lens will not be too thin, ensuring the processing and forming of the first lens, the second lens, the sixth lens, and the seventh lens while ensuring miniaturization. Preferably, -0.22 ≤ (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 ≤ 1.11.

[0088] In this embodiment, the effective focal length f1 of the first lens satisfies: |f1| < |fi|, and the effective focal length f6 of the sixth lens satisfies: |f6| < |fi|, where fi is the effective focal length of the i-th lens, and i takes 2, 3, 4, 5. By controlling the absolute values of the effective focal lengths of the first lens and the sixth lens to be less than those of other lenses, the effective focal lengths of the first lens and the sixth lens can be reasonably allocated, reducing the distortion of the outer field of view, and further controlling the distortion of the optical imaging lens group and improving the imaging quality.

[0089] In this embodiment, the refractive index N3 of the third lens, the radius of curvature R6 of the image side of the third lens, the refractive index N4 of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: 0 < N3 / R6 - N4 / R8 < 0.5. By restricting N3 / R6 - N4 / R8 within a reasonable range, it can be ensured that the third lens is a high-refractive-index material and the fourth lens is a low-refractive-index material, while making the difference in the bending degree of the surfaces of the third lens and the fourth lens not significant, thereby reducing the aberration of the optical imaging lens group and improving the imaging quality. Preferably, 0.15 ≤ N3 / R6 - N4 / R8 ≤ 0.27.

[0090] In this embodiment, the edge thickness ETi and the central thickness CTi of the i-th lens satisfy: 0.1 < ETi / CTi < 3.0, where i takes values from 1, 2, 3, 4, 5, 6, 7. By controlling the ratio of the central thickness to the edge thickness of each lens, the processing and shaping of each lens can be ensured, and at the same time, it is beneficial to achieve miniaturization.

[0091] In this embodiment, the ratio of the edge thickness to the central thickness of the first lens is less than the ratio of the edge thickness to the central thickness of the remaining lenses of the optical imaging lens group. The edge thickness ET5 and the central thickness CT5 of the fifth lens satisfy: ET5 / CT5 > 0.8. The central thickness CT7 and the edge thickness ET7 of the seventh lens satisfy: ET7 / CT7 > 1.0. By controlling the ratio of the edge thickness to the central thickness of the first lens to be the smallest among all the lenses, it can be ensured that the first lens has a positive optical power, ensuring that the aperture of the optical imaging lens group is not too small, thereby improving the imaging quality in a dark environment. In addition, it can also ensure the ratio of the edge thickness to the central thickness of the fifth lens and the seventh lens, ensuring the processability of the lenses.

[0092] In this embodiment, the effective focal length f3 of the third lens, the maximum effective radius DT32 of the image side of the third lens, the effective focal length f4 of the fourth lens, the maximum effective radius DT42 of the image side of the fourth lens, the effective focal length f5 of the fifth lens, and the maximum effective radius DT52 of the image side of the fifth lens satisfy: -6.0 < (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 < -3.0. By restricting (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 within a reasonable range, the effective focal lengths of the third lens, the fourth lens, and the fifth lens can be reasonably distributed, and the deflection angle of light can be controlled, thereby reducing aberration and improving the imaging quality. Preferably, -5.48 ≤ (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 ≤ -3.29.

[0093] In this embodiment, the absolute value of the radius of curvature R14 of the image side of the seventh lens is less than 2, and the absolute value of the radius of curvature of the image side of the seventh lens is less than the absolute value of the radius of curvature of the object side or the image side of the lenses of the remaining optical imaging lens group. By controlling the size of the radius of curvature of the image side of the seventh lens, the focal length of the seventh lens can be controlled within a reasonable range, and further, the size of the CRA (the incident angle of the chief ray on the imaging surface) under the condition of half of the maximum field angle of the optical imaging lens group can be controlled, ensuring the matching of the CRA with the chip, reducing the chip response problem caused by the mismatch of the CRA, and ensuring the imaging quality.

[0094] In this embodiment, the following conditions are satisfied among the central thickness CT3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the optical imaging lens group, the radius of curvature R5 of the object side of the third lens, the radius of curvature R6 of the image side of the third lens, the central thickness CT4 of the fourth lens, the air gap T34 between the third lens and the fourth lens on the optical axis, the radius of curvature R7 of the object side of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens: -0.5 < (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) < 1.5. By restricting (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) within a reasonable range, it is possible to ensure the processing and shaping of the third lens and the fourth lens, and also to achieve the complementary optical power of the third lens and the fourth lens, reduce the sensitivity of the design of the optical imaging lens group, reduce chromatic aberration, and improve the imaging quality. Preferably, -0.11 ≤ (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) ≤ 1.38.

[0095] In this embodiment, the following conditions are satisfied among the distance T14 from the object side of the first lens to the image side of the fourth lens on the optical axis of the optical imaging lens group, the combined focal length f1234 of the first lens to the fourth lens, the distance T57 from the object side of the fifth lens to the image side of the seventh lens on the optical axis, and the combined focal length f567 of the fifth lens to the seventh lens: 0 < T14 / f1234 + T57 / f567 < 1.0. By restricting T14 / f1234 + T57 / f567 within a reasonable range, the matching degree of the optical power and surface shape of each lens and the interval size between each lens can be controlled, thereby restricting the deflection of light rays, controlling the astigmatism generated by the lens within a certain range, and improving the imaging quality. Preferably, 0.34 ≤ T14 / f1234 + T57 / f567 ≤ 0.52.

[0096] In this embodiment, the axial distance SAG52 from the intersection point of the image side of the fifth lens and the optical axis of the optical imaging lens group to the vertex of the effective radius of the image side of the fifth lens, the radius of curvature R10 of the image side of the fifth lens, the axial distance SAG62 from the intersection point of the image side of the sixth lens and the optical axis to the vertex of the effective radius of the image side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, the axial distance SAG72 from the intersection point of the image side of the seventh lens and the optical axis to the vertex of the effective radius of the image side of the seventh lens, and the radius of curvature R14 of the image side of the seventh lens satisfy: -1.0 < SAG52 / R10 + SAG62 / R12 + SAG72 / R14 < 0. By restricting SAG52 / R10 + SAG62 / R12 + SAG72 / R to a reasonable range, the surface shapes of the fifth lens, the sixth lens, and the seventh lens can be controlled, and then the incident angle of the light on the imaging surface can be controlled, so as to ensure the characteristics of a large image surface, which is beneficial to the optical imaging lens group matching a large-size chip, improving the imaging clarity, and facilitating miniaturization while ensuring the imaging quality. Preferably, -0.74 ≤ SAG52 / R10 + SAG62 / R12 + SAG72 / R14 ≤ -0.19.

[0097] In this embodiment, when the absolute value of the effective focal length of the i-th lens is less than 10, it satisfies: -2.0 < fi / f < 1.5, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i takes values from 1, 2, 3, 4, 5, 6, 7. Such a setting can ensure that when the light outside the optical system is incident on the lens with a smaller optical power, the high-order spherical aberration can be corrected, and the optical imaging lens group has better image quality.

[0098] In this embodiment, the object side of the first lens is convex, the object side of the second lens is convex, the image side of the second lens is concave, the object side of the third lens is convex, the image side of the third lens is concave, the object side of the fourth lens is convex, and the image side of the fourth lens is convex. By controlling the surface shapes of the first lens to the fourth lens, the contribution of the first lens to the fourth lens to the spherical aberration of the entire optical imaging lens group can be ensured, thereby improving the imaging quality.

[0099] In this embodiment, the object side of the fifth lens is convex, the image side of the fifth lens is concave, the object side of the sixth lens is convex, the image side of the sixth lens is concave, the object side of the seventh lens is convex, and the image side of the seventh lens is concave. By controlling the surface shapes of the fifth lens to the seventh lens, the off-axis aberration can be reduced, and the imaging quality can be improved.

[0100] In this embodiment, the material of the first lens is glass. Such a setting can solve the problem of the decline in photographing quality caused by temperature changes, improve the temperature tolerance of the optical imaging lens group, and ensure the imaging quality.

[0101] It should be noted that for the optical imaging lens group of the present application, using glass material for the first lens can improve the temperature tolerance of the system to a state where the system's operating environment is basically not affected by temperature. The remaining lenses can also be made of glass material, which can further improve the temperature tolerance of the system. However, due to the characteristics of glass material, to ensure processability, a relatively high thickness requirement for glass is needed, sacrificing the total length of the optical imaging lens group, and the cost of glass is much higher. Therefore, selection needs to be made considering the total length, cost, and temperature performance of the system comprehensively.

[0102] In this embodiment, between the curvature radius R7 of the object side of the fourth lens and the curvature radius R8 of the image side of the fourth lens, it satisfies: -3.5 < R7 / R8 < 0; between the curvature radius R5 of the object side of the third lens and the curvature radius R6 of the image side of the third lens, it satisfies: 0 < R6 / R5 < 0.6. By restricting R7 / R8 and R6 / R5 within a reasonable range, the shapes of the third lens and the fourth lens can be controlled, ensuring the uniformity of the lens and improving the processing ability. Preferably, -3.17 ≤ R7 / R8 ≤ -0.34, 0.11 ≤ R6 / R5 ≤ 0.52.

[0103] In this embodiment, between the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens, it satisfies: -1.17 < f1 / f7 < 0.1; between the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group, it satisfies: 0.5 < f / f1 < 1.0. By restricting f1 / f7 and f / f1 within a reasonable range, the effective focal lengths of the first lens and the seventh lens can be controlled, reducing the off-axis aberration of the optical imaging lens group and improving the resolving power. Preferably, -1.16 ≤ f1 / f7 ≤ -0.52, 0.75 ≤ f / f1 ≤ 0.96.

[0104] Embodiment 2

[0105] As Figures 1 to 35As shown, the optical imaging lens group only has seven lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side of the optical imaging lens group. The focal length sign of the first lens is positive; the focal length sign of the second lens is negative; the focal length sign of the third lens is negative; the focal length sign of the fourth lens is positive; the focal length sign of the fifth lens is negative; the focal length sign of the sixth lens is positive; the focal length sign of the seventh lens is negative; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group, half of the diagonal length ImgH of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.6 < TTL / ImgH - f / f4 < 0.9; half of the diagonal length ImgH of the effective pixel area on the imaging surface is greater than 6.5 mm, and half of the diagonal length ImgH of the effective pixel area on the imaging surface and the effective focal length f of the optical imaging lens group satisfy: ImgH / f > 1.0.

[0106] Setting the focal length sign of the first lens to be positive and the focal length sign of the second lens to be negative is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the first lens and the second lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the third lens to be negative and the focal length sign of the fourth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the third lens and the fourth lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the fifth lens to be negative and the focal length sign of the sixth lens to be positive is beneficial to correcting the axial spherical aberration of the optical imaging lens group, and the positive and negative focal lengths of the fifth lens and the sixth lens cooperate with each other to offset the aberration generated by each other. Setting the focal length sign of the seventh lens to be negative can correct the aberration generated by the first lens to the sixth lens, thereby reducing the overall aberration of the optical imaging lens group and improving the imaging quality. By reasonably distributing the positive and negative focal lengths of each lens, it is possible to avoid large deflections of light, control the aberration, and improve the imaging quality.

[0107] By restricting TTL / ImgH - f / f4 within a reasonable range, the total length of the optical imaging lens group can be controlled, which is beneficial to miniaturization. At the same time, reasonably distributing the effective focal length of the fourth lens is beneficial to converging light, and thus beneficial to miniaturization. At the same time, since ImgH is greater than 6.5 mm, that is, the optical imaging lens group has the characteristic of a large image surface. At the same time, restricting ImgH / f within a reasonable range can ensure the characteristic of the large image surface. When taking pictures, relatively rich information can be obtained, and a high-quality imaging effect can be obtained. It can also control the effective focal length of the optical imaging lens group to be small, effectively compress the optical total length, and is beneficial to achieving ultra-thinness and miniaturization while ensuring the imaging quality.

[0108] Preferably, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group, half of the diagonal length ImgH of the effective pixel area on the imaging surface, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy: 0.75 ≤ TTL / ImgH - f / f4 ≤ 0.83.

[0109] Preferably, half of the diagonal length ImgH of the effective pixel area on the imaging surface and the effective focal length f of the optical imaging lens group satisfy: 1.07 ≤ ImgH / f ≤ 1.31.

[0110] In this embodiment, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side of the seventh lens satisfy: 0.3 < T45 / R9 + T56 / R11 + T67 / R13 < 1.0. By limiting T45 / R9 + T56 / R11 + T67 / R13 within a reasonable range, it is necessary to ensure the optical power of the fourth, fifth, and sixth lenses, thereby restricting the deflection of light rays and avoiding the excessive distance of marginal rays from the optical axis, thus effectively reducing the local astigmatism of the optical imaging lens group and improving the imaging quality. Preferably, 0.40 ≤ T45 / R9 + T56 / R11 + T67 / R13 ≤ 0.61.

[0111] In this embodiment, the dispersion coefficient V1 of the first lens, the effective focal length f1 of the first lens, the dispersion coefficient V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 6.0 < V1 / f1 + V2 / f2 < 10.0. By limiting V1 / f1 + V2 / f2 within a reasonable range, the dispersion of light rays after passing through the first and second lenses is restricted, thereby effectively balancing the image-side aberrations of the first and second lenses, reasonably distributing the effective focal lengths of the first and second lenses, and facilitating the realization of the characteristics of a large image surface. Preferably, 7.68 ≤ V1 / f1 + V2 / f2 ≤ 9.67.

[0112] In this embodiment, the refractive index N1 of the first lens, the central thickness CT1 of the first lens, the refractive index N2 of the second lens, and the central thickness CT2 of the second lens satisfy: 5.0 < N1 / CT1 + N2 / CT2 < 10.0. By restricting N1 / CT1 + N2 / CT2 within a reasonable range, it can be ensured that the first lens is a low-refractive-index material and the second lens is a high-refractive-index material, enabling the first lens and the second lens to cooperate with each other to reduce distortion, thereby reducing aberration and improving image quality. While ensuring the imaging quality, it can also limit the thicknesses of the first lens and the second lens within a reasonable range, which is beneficial to achieving miniaturization. Preferably, 5.78 ≤ N1 / CT1 + N2 / CT2 ≤ 7.13.

[0113] In this embodiment, the central thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side of the fifth lens, the central thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side of the sixth lens, the central thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side of the seventh lens satisfy: 0.1 < CT5 / DT51 + CT6 / DT61 + CT7 / DT71 < 1.0. By restricting CT5 / DT51 + CT6 / DT61 + CT7 / DT71 within a reasonable range, it can control the central thicknesses and edge thicknesses of the fifth lens, the sixth lens, and the seventh lens to meet the requirements of processing and forming. At the same time, it makes the interval range between the fifth lens, the sixth lens, and the seventh lens relatively reasonable, avoiding interference during the lens assembly process and ensuring the assembly stability. It can also control the total length of the optical imaging lens group, which is beneficial to achieving miniaturization. Preferably, 0.32 ≤ CT5 / DT51 + CT6 / DT61 + CT7 / DT71 ≤ 0.57.

[0114] In this embodiment, the sum of the central thickness of the first lens and the central thickness of the second lens is greater than the sum of the central thickness of the sixth lens and the central thickness of the seventh lens. The central thickness CT1 of the first lens, the central thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the central thickness CT6 of the sixth lens, the central thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5 < (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 < 1.5. By controlling the sum of the central thickness of the first lens and the central thickness of the second lens to be greater than the sum of the central thickness of the sixth lens and the central thickness of the seventh lens, it is beneficial to achieve a small head. At the same time, restricting (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 within a reasonable range ensures that the thicknesses of the first lens and the second lens are not too thick, and the thicknesses of the sixth lens and the seventh lens are not too thin, while ensuring the processing and shaping of the first lens, the second lens, the sixth lens, and the seventh lens while guaranteeing miniaturization. Preferably, -0.22 ≤ (CT1 + CT2) * 10 / f12 + (CT6 + CT7) * 10 / f67 ≤ 1.11.

[0115] In this embodiment, the effective focal length f1 of the first lens satisfies: |f1| < |fi|, and the effective focal length f6 of the sixth lens satisfies: |f6| < |fi|, where fi is the effective focal length of the i-th lens, and i takes values of 2, 3, 4, 5. By controlling the absolute values of the effective focal lengths of the first lens and the sixth lens to be less than those of other lenses, the effective focal lengths of the first lens and the sixth lens can be reasonably allocated, reducing the distortion of the outer field of view, and thus controlling the distortion of the optical imaging lens group and improving the imaging quality.

[0116] In this embodiment, the refractive index N3 of the third lens, the radius of curvature R6 of the image side of the third lens, the refractive index N4 of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: 0 < N3 / R6 - N4 / R8 < 0.5. By restricting N3 / R6 - N4 / R8 within a reasonable range, it can be ensured that the third lens is a high-refractive-index material and the fourth lens is a low-refractive-index material, while making the difference in the curvature of the surfaces of the third lens and the fourth lens not significant, thereby reducing the aberration of the optical imaging lens group and improving the imaging quality. Preferably, 0.15 ≤ N3 / R6 - N4 / R8 ≤ 0.27.

[0117] In this embodiment, the edge thickness ETi and the central thickness CTi of the i-th lens satisfy: 0.1 < ETi / CTi < 3.0, where i takes values from 1, 2, 3, 4, 5, 6, 7. By controlling the ratio of the central thickness to the edge thickness of each lens, the processing and shaping of each lens can be ensured, and at the same time, it is beneficial to achieve miniaturization.

[0118] In this embodiment, the ratio of the edge thickness to the center thickness of the first lens is smaller than the ratios of the edge thickness to the center thickness of the remaining lenses in the optical imaging lens set. The edge thickness ET5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy the following relationship: ET5 / CT5>0.8. The center thickness CT7 of the seventh lens and the edge thickness ET7 of the seventh lens satisfy the following relationship: ET7 / CT7>1.0. By minimizing the ratio of the edge thickness to the center thickness of the first lens among all the lenses, the first lens is ensured to have a positive optical power, ensuring that the aperture of the optical imaging lens set is not too small, thereby improving imaging quality in dark environments. Furthermore, the ratios of the edge thickness to the center thickness of the fifth and seventh lenses are maintained, ensuring the processability of the lenses.

[0119] In this embodiment, the effective focal length f3 of the third lens element, the maximum effective radius DT32 of the image side surface of the third lens element, the effective focal length f4 of the fourth lens element, the maximum effective radius DT42 of the image side surface of the fourth lens element, the effective focal length f5 of the fifth lens element, and the maximum effective radius DT52 of the image side surface of the fifth lens element satisfy the following relationship: -6.0 < (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 < -3.0. By limiting (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 to a reasonable range, the effective focal lengths of the third, fourth, and fifth lenses can be reasonably allocated, the deflection angle of light can be controlled, thereby reducing aberrations and improving imaging quality. Preferably, -5.48 ≤ (f3 / DT32 + f4 / DT42 + f5 / DT52) / 3 ≤ -3.29.

[0120] In this embodiment, the absolute value of the radius of curvature R14 of the image-side surface of the seventh lens element is less than 2, and the absolute value of the radius of curvature of the image-side surface of the seventh lens element is smaller than the absolute values of the radii of curvature of the object-side or image-side surfaces of the remaining lenses in the optical imaging lens assembly. By controlling the radius of curvature of the image-side surface of the seventh lens element, the focal length of the seventh lens element can be controlled within a reasonable range, thereby controlling the CRA (the angle of incidence of the principal ray at the imaging surface) at half the maximum field of view of the optical imaging lens assembly, ensuring the compatibility of the CRA with the chip, reducing chip response issues caused by CRA mismatch, and ensuring imaging quality.

[0121] In this embodiment, the following relationships are satisfied among the central thickness CT3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the optical imaging lens group, the curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, the central thickness CT4 of the fourth lens, the air gap T34 between the third lens and the fourth lens on the optical axis, the curvature radius R7 of the object side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens: -0.5 < (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) < 1.5. By restricting (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) within a reasonable range, it is possible to ensure the processing and shaping of the third lens and the fourth lens, and also achieve the complementary optical powers of the third lens and the fourth lens, reduce the sensitivity of the design of the optical imaging lens group, reduce chromatic aberration, and improve the imaging quality. Preferably, -0.11 ≤ (CT3 + T34) / (R5 - R6) - (CT4 + T34) / (R7 + R8) ≤ 1.38.

[0122] In this embodiment, the following relationships are satisfied among the distance T14 from the object side surface of the first lens to the image side surface of the fourth lens on the optical axis of the optical imaging lens group, the combined focal length f1234 of the first lens to the fourth lens, the distance T57 from the object side surface of the fifth lens to the image side surface of the seventh lens on the optical axis, and the combined focal length f567 of the fifth lens to the seventh lens: 0 < T14 / f1234 + T57 / f567 < 1.0. By restricting T14 / f1234 + T57 / f567 within a reasonable range, it is possible to control the matching degree of the optical powers and surface shapes of each lens and the interval size between each lens, thereby restricting the deflection of light rays, controlling the astigmatism generated by the lens within a certain range, and improving the imaging quality. Preferably, 0.34 ≤ T14 / f1234 + T57 / f567 ≤ 0.52.

[0123] In this embodiment, the axial distance SAG52 from the intersection of the image side of the fifth lens and the optical axis of the optical imaging lens group to the vertex of the effective radius of the image side of the fifth lens, the radius of curvature R10 of the image side of the fifth lens, the axial distance SAG62 from the intersection of the image side of the sixth lens and the optical axis to the vertex of the effective radius of the image side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, the axial distance SAG72 from the intersection of the image side of the seventh lens and the optical axis to the vertex of the effective radius of the image side of the seventh lens, and the radius of curvature R14 of the image side of the seventh lens satisfy: -1.0 < SAG52 / R10 + SAG62 / R12 + SAG72 / R14 < 0. By restricting SAG52 / R10 + SAG62 / R12 + SAG72 / R14 within a reasonable range, the surface shapes of the fifth, sixth, and seventh lenses can be controlled, and then the incident angle of the light on the imaging surface can be controlled, thereby ensuring the characteristics of a large image surface, which is beneficial for the optical imaging lens group to match a large-size chip, improving the imaging clarity, and being conducive to miniaturization while ensuring the imaging quality. Preferably, -0.74 ≤ SAG52 / R10 + SAG62 / R12 + SAG72 / R14 ≤ -0.19.

[0124] In this embodiment, when the absolute value of the effective focal length of the i-th lens is less than 10, it satisfies: -2.0 < fi / f < 1.5, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i takes values from 1, 2, 3, 4, 5, 6, 7. Such a setting can ensure that when the light outside the optical system is incident on the lens with a smaller optical power, the high-order spherical aberration can be corrected, and the optical imaging lens group has better image quality.

[0125] In this embodiment, the object side of the first lens is convex, the object side of the second lens is convex, the image side of the second lens is concave, the object side of the third lens is convex, the image side of the third lens is concave, the object side of the fourth lens is convex, and the image side of the fourth lens is convex. By controlling the surface shapes of the first to fourth lenses, the contribution of the first to fourth lenses to the spherical aberration of the entire optical imaging lens group can be ensured, thereby improving the imaging quality.

[0126] In this embodiment, the object side of the fifth lens is convex, the image side of the fifth lens is concave, the object side of the sixth lens is convex, the image side of the sixth lens is concave, the object side of the seventh lens is convex, and the image side of the seventh lens is concave. By controlling the surface shapes of the fifth to seventh lenses, the off-axis aberration can be reduced, and the imaging quality can be improved.

[0127] In this embodiment, the material of the first lens is glass. Such a setting can solve the problem of the degradation of the photographing quality caused by temperature changes, improve the temperature tolerance of the optical imaging lens group, and ensure the imaging quality.

[0128] It should be noted that for the optical imaging lens group of the present application, using glass material for the first lens can improve the temperature tolerance of the system to a state where the system's operating environment is basically not affected by temperature. The remaining lenses can also be made of glass material, which can further improve the temperature tolerance of the system. However, due to the characteristics of glass material, to ensure processability, there are relatively high requirements for the thickness of the glass, sacrificing the total length of the optical imaging lens group, and the cost of glass is much higher. Therefore, selection needs to be made considering the total length of the system, cost, and temperature performance comprehensively.

[0129] In this embodiment, the curvature radius R7 of the object side of the fourth lens and the curvature radius R8 of the image side of the fourth lens satisfy: -3.5 < R7 / R8 < 0; the curvature radius R5 of the object side of the third lens and the curvature radius R6 of the image side of the third lens satisfy: 0 < R6 / R5 < 0.6. By restricting R7 / R8 and R6 / R5 within a reasonable range, the shapes of the third lens and the fourth lens can be controlled, ensuring the uniformity of the lenses and improving the processing ability. Preferably, -3.17 ≤ R7 / R8 ≤ -0.34, 0.11 ≤ R6 / R5 ≤ 0.52.

[0130] In this embodiment, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: -1.17 < f1 / f7 < 0.1; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: 0.5 < f / f1 < 1.0. By restricting f1 / f7 and f / f1 within a reasonable range, the effective focal lengths of the first lens and the seventh lens can be controlled, reducing the off-axis aberration of the optical imaging lens group and improving the resolution. Preferably, -1.16 ≤ f1 / f7 ≤ -0.52, 0.75 ≤ f / f1 ≤ 0.96.

[0131] Optionally, the above optical imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0132] The optical imaging lens group in the present application can adopt multiple lenses, such as the seven lenses mentioned above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the on-axis distance between each lens, etc., the aperture of the optical imaging lens group can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the optical imaging lens group more conducive to production and applicable to portable electronic devices such as smart phones. The above optical imaging lens group also has the advantages of large aperture, large field angle, and good imaging quality, and can meet the requirements of miniaturization of intelligent electronic products.

[0133] In this application, at least one of the lens surfaces is an aspherical surface. Aspherical lenses are characterized by a continuously varying curvature from the lens center to the lens periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the lens periphery, aspherical lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspherical lenses can minimize aberrations that occur during imaging, thereby improving image quality.

[0134] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens set can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe seven lenses as an example, the optical imaging lens set is not limited to seven lenses. If desired, the optical imaging lens set can also include other numbers of lenses.

[0135] The following further describes examples of specific surface shapes and parameters of the optical imaging lens assembly applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0136] It should be noted that any one of the following examples 1 to 7 is applicable to all embodiments of the present application.

[0137] Example 1

[0138] like Figures 1 to 5 As shown, the optical imaging lens set of Example 1 of the present application is described. Figure 1 A schematic structural diagram of the optical imaging lens assembly of Example 1 is shown.

[0139] like Figure 1 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0140] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0141] In this example, the effective focal length f of the optical imaging lens group is 6.32 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 8.10 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.60, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0142] In this example, the absolute values of the effective focal lengths of the first lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.14, f6 / f=1.02, and f7 / f=-0.98.

[0143] Table 1 shows the basic structural parameters of the optical imaging lens assembly of Example 1, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0144]

[0145]

[0146] Table 1

[0147] In Example 1, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0148]

[0149] Where x is the distance vector 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., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric mirror surface S1-S14 in Example 1.

[0150]

[0151]

[0152] Table 2

[0153] Figure 2 The axial chromatic aberration curve of the optical imaging lens assembly of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 3 The astigmatism curve of the optical imaging lens group of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4 The distortion curve of the optical imaging lens assembly of Example 1 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 5 The chromatic aberration curve of the optical imaging lens assembly of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0154] according to Figures 2 to 5 It can be seen that the optical imaging lens assembly given in Example 1 can achieve good imaging quality.

[0155] Example 2

[0156] like Figures 6 to 10 As shown, the optical imaging lens set of Example 2 of the present application is described. Figure 6 The following is a schematic diagram of the structure of the optical imaging lens assembly of Example 2. For the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0157] like Figure 6 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0158] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0159] In this example, the effective focal length f of the optical imaging lens group is 5.17 mm, the maximum field of view FOV of the optical imaging lens group is 88.4°, the total length TTL of the optical imaging lens group is 7.10 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.55, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0160] In this example, the absolute values of the effective focal lengths of the first lens, the fifth lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.26, f5 / f=-1.77, f6 / f=0.84, and f7 / f=-1.9.

[0161] Table 3 shows the basic structural parameters of the optical imaging lens assembly of Example 2, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0162]

[0163] Table 3

[0164] Table 4 gives the high-order coefficients of the aspheric mirror surfaces S1-S14 that can be used in Example 2, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0165]

[0166]

[0167] Table 4

[0168] Figure 7 The axial chromatic aberration curve of the optical imaging lens assembly of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 8 The astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 9 The distortion curve of the optical imaging lens assembly of Example 2 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 10 The chromatic aberration curve of the optical imaging lens assembly of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0169] according to Figures 7 to 10 It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0170] Example 3

[0171] like Figures 11 to 15 As shown, the optical imaging lens group of Example 3 of the present application is described. Figure 11 A schematic structural diagram of the optical imaging lens assembly of Example 3 is shown.

[0172] like Figure 11 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0173] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0174] In this example, the effective focal length f of the optical imaging lens group is 5.67 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 7.50 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.60, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0175] In this example, the absolute values of the effective focal lengths of the first lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.19, f6 / f=0.97, and f7 / f=-1.32.

[0176] Table 5 shows the basic structural parameters of the optical imaging lens assembly of Example 3, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0177]

[0178] Table 5

[0179] Table 6 gives the high-order coefficients of the aspheric mirror surfaces S1-S14 that can be used in Example 3, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0180]

[0181]

[0182] Table 6

[0183] Figure 12 The axial chromatic aberration curve of the optical imaging lens assembly of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 13 The astigmatism curve of the optical imaging lens group of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 14 The distortion curve of the optical imaging lens assembly of Example 3 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 15 The chromatic aberration curve of the optical imaging lens assembly of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0184] according to Figures 12 to 15 It can be seen that the optical imaging lens assembly given in Example 3 can achieve good imaging quality.

[0185] Example 4

[0186] like Figures 16 to 20 As shown, the optical imaging lens group of Example 4 of the present application is described. Figure 16A schematic structural diagram of the optical imaging lens assembly of Example 4 is shown.

[0187] like Figure 16 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0188] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0189] In this example, the effective focal length f of the optical imaging lens group is 5.86 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 7.80 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 7.12 mm, and the aperture number f / EPD of the optical imaging lens group is 1.60, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0190] In this example, the absolute values of the effective focal lengths of the first lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.2, f6 / f=0.98, and f7 / f=-1.37.

[0191] Table 7 shows the basic structural parameters of the optical imaging lens assembly of Example 4, wherein the units of curvature radius, thickness / distance, etc. are all millimeters (mm).

[0192]

[0193] Table 7

[0194] Table 8 gives the high-order coefficients of the aspheric mirror surfaces S1-S14 that can be used in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0195] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.8949E-03 -1.2638E-03 -8.4021E-04 -2.0248E-04 -6.5349E-05 -1.6557E-05 -1.5362E-05 S2 -5.5160E-02 1.1313E-02 -3.7126E-03 7.5034E-04 -3.5838E-04 -2.4444E-05 -4.4554E-05 S3 -6.3323E-02 2.2839E-02 -2.0566E-03 1.1030E-03 -2.7699E-04 -1.8686E-05 -3.5913E-05 S4 -2.2175E-02 1.0586E-02 4.5102E-04 6.8737E-04 1.0842E-04 2.2404E-05 4.3470E-06 S5 -1.8592E-01 -9.2834E-03 1.2176E-04 1.0413E-03 3.1222E-04 1.4133E-04 2.3668E-05 S6 -2.6896E-01 2.1927E-02 3.3778E-03 2.1681E-03 1.4868E-03 2.0300E-04 3.7202E-05 S7 -2.3611E-01 2.8402E-02 -1.7271E-03 3.0541E-03 4.2616E-03 8.7911E-04 2.0159E-05 S8 -3.6110E-01 -2.3703E-02 -1.1831E-04 1.2077E-03 5.1630E-03 2.9969E-03 1.8989E-03 S9 -7.4953E-01 -7.9754E-02 3.7706E-03 1.3437E-02 3.1496E-03 8.4762E-04 2.4980E-04 S10 -1.6165E+00 3.1834E-01 -1.0692E-02 1.2211E-02 -1.7899E-02 -7.2869E-04 2.9948E-03 S11 -3.4428E+00 1.8274E-01 1.5310E-01 1.0659E-02 -2.2562E-02 -6.2279E-03 1.6322E-03 S12 -1.6876E+00 -1.2470E-01 2.2114E-01 -1.6359E-01 5.5789E-02 -7.9033E-03 3.6950E-03 S13 -9.4543E+00 3.1866E+00 -1.4212E+00 6.5191E-01 -2.8244E-01 9.8562E-02 -2.8001E-02 S14 -1.5795E+01 3.8937E+00 -1.3611E+00 5.9571E-01 -3.0205E-01 1.2165E-01 -6.4634E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.7098E-06 -9.1278E-06 -3.8775E-06 -2.2928E-07 1.8119E-06 0.0000E+00 0.0000E+00 S2 -1.5959E-05 -6.3756E-06 -3.7746E-06 3.4878E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 -9.6222E-06 -4.9167E-06 1.3643E-06 1.7731E-06 3.7883E-06 0.0000E+00 0.0000E+00 S4 -9.1205E-06 -3.5237E-06 -4.1816E-06 1.6056E-06 -9.0704E-07 0.0000E+00 0.0000E+00 S5 4.8305E-06 -1.1693E-05 -5.7689E-06 -6.7062E-06 2.0999E-06 -3.9066E-07 2.0105E-06 S6 -1.6100E-04 -4.6188E-05 -6.8558E-05 -7.6377E-06 -6.1309E-06 1.0113E-05 2.4649E-06 S7 -3.8636E-04 -2.0619E-04 -1.3055E-04 5.5356E-06 3.8225E-05 3.8872E-05 2.0528E-05 S8 7.7729E-04 3.7472E-04 6.0871E-05 2.3284E-06 -5.2207E-05 -2.3697E-05 -2.6570E-05 S9 -3.0960E-04 -1.2705E-04 -2.2579E-04 -4.8938E-05 3.2839E-05 5.2622E-07 2.1201E-05 S10 5.1044E-04 -3.8161E-05 -5.8797E-04 1.5559E-04 4.7691E-05 0.0000E+00 0.0000E+00 S11 3.0101E-03 9.2122E-05 -1.3792E-03 3.7443E-04 1.0533E-04 1.0848E-04 -8.4161E-05 S12 -3.0652E-03 4.5608E-04 1.4740E-03 -3.0570E-04 -4.3291E-04 3.4050E-04 -2.2052E-05 S13 4.9363E-03 -1.8734E-03 1.0757E-03 -6.7499E-04 4.1165E-04 -1.4391E-04 7.7120E-05 S14 3.3721E-02 -1.9652E-02 7.8392E-03 -5.4559E-03 3.3484E-03 -1.8511E-03 7.9840E-04

[0196] Table 8

[0197] Figure 17 The axial chromatic aberration curve of the optical imaging lens assembly of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 18 An astigmatism curve of the optical imaging lens group of Example 4 is shown, which represents meridional field curvature and sagittal field curvature. Figure 19 The distortion curve of the optical imaging lens assembly of Example 4 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 20 The chromatic aberration curve of the optical imaging lens assembly of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0198] according to Figures 17 to 20 It can be seen that the optical imaging lens assembly provided in Example 4 can achieve good imaging quality.

[0199] Example 5

[0200] like Figures 21 to 25 As shown, the optical imaging lens set of Example 5 of the present application is described. Figure 21 A schematic structural diagram of the optical imaging lens assembly of Example 5 is shown.

[0201] like Figure 21 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0202] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0203] In this example, the effective focal length f of the optical imaging lens group is 5.50 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 7.86 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.60, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0204] In this example, the absolute value of the effective focal lengths of the first lens and the sixth lens is less than 10, f1 / f=1.04, and f6 / f=1.03.

[0205] Table 9 shows the basic structural parameters of the optical imaging lens assembly of Example 5, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0206]

[0207]

[0208] Table 9

[0209] Table 10 gives the high-order coefficients that can be used for each aspheric mirror surface S1-S14 in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0210]

[0211] Table 10

[0212] Figure 22The axial chromatic aberration curve of the optical imaging lens assembly of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 23 An astigmatism curve of the optical imaging lens group of Example 5 is shown, which represents meridional field curvature and sagittal field curvature. Figure 24 The distortion curve of the optical imaging lens assembly of Example 5 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 25 The chromatic aberration curve of the optical imaging lens assembly of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0213] according to Figures 21 to 25 It can be seen that the optical imaging lens assembly provided in Example 5 can achieve good imaging quality.

[0214] Example 6

[0215] like Figures 26 to 30 As shown, the optical imaging lens set of Example 6 of the present application is described. Figure 26 A schematic structural diagram of the optical imaging lens assembly of Example 6 is shown.

[0216] like Figure 26 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0217] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0218] In this example, the effective focal length f of the optical imaging lens group is 5.86 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 7.99 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.50, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0219] In this example, the absolute values of the effective focal lengths of the first lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.33, f6 / f=0.99, and f7 / f=-1.37.

[0220] Table 11 shows the basic structural parameters of the optical imaging lens assembly of Example 6, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0221]

[0222]

[0223] Table 11

[0224] Table 12 gives the high-order coefficients of the aspheric mirror surfaces S1-S14 that can be used in Example 6, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0225] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.9502E-02 2.8092E-03 6.3850E-05 -3.8997E-04 -7.2346E-06 -6.2367E-05 2.1013E-05 S2 -7.7946E-02 1.9320E-02 -4.3286E-03 1.1826E-03 -3.6796E-04 -8.4492E-05 -5.8722E-05 S3 -8.1838E-02 3.1050E-02 -2.0509E-03 1.9109E-03 -2.0482E-04 -7.1250E-05 -4.2661E-05 S4 -2.0503E-02 1.1477E-02 4.7979E-04 1.1313E-03 2.1263E-04 7.2879E-05 1.3279E-05 S5 -1.9637E-01 -1.1004E-02 1.0679E-03 1.0447E-03 2.8090E-04 7.0579E-05 3.8015E-05 S6 -2.1033E-01 1.4115E-02 3.8467E-03 4.6854E-04 5.9148E-04 2.7644E-04 -5.2460E-05 S7 -1.0566E-01 1.0772E-02 -4.6356E-03 -2.2070E-03 5.8987E-04 3.2854E-04 -1.1061E-04 S8 -2.2464E-01 -1.4969E-02 -5.2917E-03 -1.7513E-03 6.0579E-04 5.0338E-04 3.0460E-04 S9 -6.1236E-01 -4.0424E-02 -9.7260E-03 5.5440E-03 -1.0744E-03 1.1662E-03 6.6846E-05 S10 -1.4373E+00 2.6293E-01 3.2957E-04 8.1104E-03 -1.1030E-02 -2.3752E-04 7.8204E-04 S11 -2.2963E+00 -6.7293E-02 7.7567E-02 2.9796E-02 -5.7198E-03 -3.5517E-03 -8.7398E-04 S12 -6.5064E-01 -2.6969E-01 1.9967E-01 -9.6066E-02 9.9359E-03 4.6246E-03 2.0084E-03 S13 -8.3488E+00 2.8808E+00 -1.2386E+00 5.0512E-01 -1.5848E-01 2.1216E-02 9.8057E-03 S14 -1.4197E+01 3.5097E+00 -1.2332E+00 5.2709E-01 -2.3737E-01 9.4971E-02 -4.2809E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.0527E-05 3.6896E-06 -1.0505E-05 1.5272E-05 8.8629E-07 0.0000E+00 0.0000E+00 S2 -3.1468E-05 6.3913E-07 -2.9081E-06 1.3105E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.7736E-05 1.1241E-05 -5.5709E-07 6.8270E-06 -5.1631E-06 0.0000E+00 0.0000E+00 S4 3.0282E-06 6.8395E-06 6.2382E-06 2.1378E-06 -5.5225E-06 0.0000E+00 0.0000E+00 S5 1.1585E-05 1.1383E-05 -2.2631E-07 6.8606E-06 3.5292E-06 -2.7186E-07 -4.7120E-06 S6 -1.2508E-05 4.9223E-05 -1.4408E-05 -1.5648E-05 -1.2243E-05 2.0947E-06 -7.1321E-07 S7 1.3081E-05 7.2094E-05 -8.5345E-06 -1.4914E-05 7.7863E-07 2.4495E-06 4.4646E-06 S8 5.2527E-05 7.5292E-05 -1.2746E-05 1.9520E-05 -2.3010E-05 7.6192E-06 -1.0016E-05 S9 3.0508E-04 -1.3295E-04 3.0748E-05 -9.5440E-05 3.5656E-05 -4.0051E-05 1.9763E-05 S10 5.1724E-04 6.2676E-07 -4.8442E-05 6.5326E-06 8.8109E-07 0.0000E+00 0.0000E+00 S11 6.6202E-04 2.1540E-04 -7.9206E-05 5.5528E-05 -3.7312E-06 -3.4367E-05 1.6143E-05 S12 -2.2181E-03 -8.1489E-04 8.1780E-04 4.6764E-04 -2.1112E-04 -1.4032E-05 -2.1935E-05 S13 -3.2405E-03 -3.5792E-03 3.6002E-03 -1.4415E-03 1.6255E-04 7.2580E-05 -2.1096E-05 S14 2.4872E-02 -1.3954E-02 7.9672E-03 -3.5163E-03 1.7857E-03 -9.0979E-04 5.3902E-05

[0226] Table 12

[0227] Figure 27 The axial chromatic aberration curve of the optical imaging lens assembly of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 28 An astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents meridional field curvature and sagittal field curvature. Figure 29 The distortion curve of the optical imaging lens assembly of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 30 The chromatic aberration curve of the optical imaging lens assembly of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0228] according to Figures 27 to 30 It can be seen that the optical imaging lens assembly given in Example 6 can achieve good imaging quality.

[0229] Example 7

[0230] like Figures 31 to 35 As shown, the optical imaging lens group of Example 7 of the present application is described. Figure 31 A structural schematic diagram of the optical imaging lens assembly of Example 7 is shown.

[0231] like Figure 31 As shown, the optical imaging lens assembly includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0232] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0233] In this example, the effective focal length f of the optical imaging lens group is 5.92 mm, the maximum field of view FOV of the optical imaging lens group is 88.0°, the total length TTL of the optical imaging lens group is 7.90 mm, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH is 6.78 mm, and the aperture number f / EPD of the optical imaging lens group is 1.55, where EPD is the entrance pupil diameter of the optical imaging lens group.

[0234] In this example, the absolute values of the effective focal lengths of the first lens, the sixth lens, and the seventh lens are less than 10, f1 / f=1.28, f6 / f=1.02, and f7 / f=-1.61.

[0235] Table 13 shows the basic structural parameters of the optical imaging lens assembly of Example 7, wherein the units of curvature radius, thickness / distance are all millimeters (mm).

[0236]

[0237]

[0238] Table 13

[0239] Table 14 gives the high-order coefficients of the aspheric mirror surfaces S1-S14 that can be used in Example 7, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0240]

[0241]

[0242] Table 14

[0243] Figure 32 The axial chromatic aberration curve of the optical imaging lens assembly of Example 7 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens assembly. Figure 33 The astigmatism curve of the optical imaging lens group of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 34 The distortion curve of the optical imaging lens assembly of Example 7 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 35 The chromatic aberration curve of the optical imaging lens assembly of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens assembly.

[0244] according to Figures 32 to 35 It can be seen that the optical imaging lens assembly given in Example 7 can achieve good imaging quality.

[0245] In summary, Examples 1 to 7 respectively satisfy the relationships shown in Table 15.

[0246] Conditional / Example 1 2 3 4 5 6 7 TTL / ImgH-f / f4 0.82 0.76 0.79 0.75 0.77 0.83 0.75 R14 / f7 -0.31 -0.12 -0.19 -0.17 -0.16 -0.18 -0.14 |R2 / R7| 0.72 1.13 0.81 0.86 2.53 0.51 0.55 ImgH / f 1.07 1.31 1.20 1.21 1.23 1.16 1.14 T45 / R9+T56 / R11+T67 / R13 0.40 0.56 0.58 0.61 0.53 0.45 0.58 V1 / f1+V2 / f2 8.22 8.95 8.65 8.32 9.67 7.74 7.68 N1 / CT1+N2 / CT2 6.05 6.66 6.19 5.78 7.13 6.40 7.06 CT5 / DT51+CT6 / DT61+CT7 / DT71 0.46 0.32 0.34 0.33 0.52 0.57 0.38 (CT1+CT2)*10 / f12+(CT6+CT7)*10 / f67 1.11 -0.22 0.53 0.48 -0.15 0.38 0.24 N3 / R6-N4 / R8 0.23 0.15 0.18 0.18 0.27 0.26 0.26 (f3 / DT32+f4 / DT42+f5 / DT52) / 3 -3.84 -3.29 -4.11 -3.90 -4.10 -4.53 -5.48 (CT3+T34) / (R5-R6)-(CT4+T34) / (R7+R8) 0.27 0.04 0.18 0.46 -0.04 1.38 -0.11 T14 / f1234+T57 / f567 0.34 0.51 0.44 0.45 0.52 0.45 0.42 SAG52 / R10+SAG62 / R12+SAG72 / R14 -0.74 -0.62 -0.71 -0.73 -0.19 -0.29 -0.26 f1 / f 1.14 1.26 1.19 1.2 1.04 1.33 1.28 f5 / f / -1.77 / / / / / f6 / f 1.02 0.84 0.97 0.98 1.03 0.99 1.02 f7 / f -0.98 -1.9 -1.32 -1.37 / -1.37 -1.61 ET1 / CT1 0.38 0.44 0.42 0.41 0.44 0.38 0.39 ET2 / CT2 1.21 1.32 1.28 1.27 1.41 1.24 1.29 ET3 / CT3 1.28 1.11 1.15 1.13 1.10 1.27 1.20 ET4 / CT4 0.49 0.44 0.47 0.44 0.51 0.50 0.45 ET5 / CT5 1.11 1.57 1.45 1.60 1.27 0.99 1.06 ET6 / CT6 1.06 0.90 1.03 1.04 0.69 0.58 1.12 ET7 / CT7 1.02 1.31 1.19 1.25 2.82 2.58 2.14 R7 / R8 -0.84 -0.34 -0.78 -0.90 -3.17 -0.97 -1.37 R6 / R5 0.29 0.18 0.17 0.13 0.11 0.52 0.52 f1 / f7 -1.16 -0.66 -0.91 -0.87 -0.52 -0.97 -0.79 f / f1 0.88 0.79 0.84 0.84 0.96 0.75 0.78

[0247] Table 15

[0248] Table 16 shows the effective focal length f of the optical imaging lens set of Examples 1 to 7, and the effective focal lengths f1 to f7 of each lens.

[0249] Basic data / examples 1 2 3 4 5 6 7 f1(mm) 7.19 6.53 6.76 7.02 5.70 7.77 7.56 f2(mm) -27.81 -21.97 -23.15 -23.56 -12.19 -38.35 -24.00 f3(mm) -23.56 -27.39 -28.40 -27.79 -24.62 -30.08 -35.71 f4(mm) 16.63 17.97 17.62 16.89 14.11 16.87 14.17 f5(mm) -19.87 -9.15 -14.39 -14.04 -14.44 -15.72 -12.30 f6(mm) 6.44 4.34 5.52 5.73 5.68 5.79 6.04 f7(mm) -6.21 -9.84 -7.47 -8.03 -10.92 -8.04 -9.54 f(mm) 6.32 5.17 5.67 5.86 5.50 5.86 5.92 TTL(mm) 8.10 7.10 7.50 7.80 7.86 7.99 7.90 ImgH(mm) 6.78 6.78 6.78 7.12 6.78 6.78 6.78 FOV(°) 88.0 88.4 88.0 88.0 88.0 88.0 88.0 f / EPD 1.60 1.55 1.60 1.60 1.60 1.50 1.55

[0250] Table 16

[0251] 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 assembly described above.

[0252] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0253] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0254] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0255] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical imaging lens assembly, characterized in that: The optical imaging lens set has only seven lenses, which include, from the object side to the image side, the following lenses: a first lens, wherein the focal length of the first lens has a positive sign, and the object side surface of the first lens is a convex surface; a second lens, wherein the focal length sign of the second lens is negative, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens, wherein the focal length sign of the third lens is negative, the object-side surface of the third lens is convex, and the image-side surface of the third lens is concave; a fourth lens, wherein the focal length sign of the fourth lens is positive, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex; a fifth lens, wherein the focal length sign of the fifth lens is negative, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is concave; a sixth lens, wherein the focal length sign of the sixth lens is positive, the object-side surface of the sixth lens is convex, and the image-side surface of the sixth lens is concave; a seventh lens, wherein the focal length sign of the seventh lens is negative, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave; The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group, half the diagonal length of the effective pixel area on the imaging surface ImgH, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy the following: 0.75≤TTL / ImgH-f / f4≤0.83; The curvature radius R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy the following: -0.31≤R14 / f7≤-0.12; A curvature radius R2 of the image side surface of the first lens and a curvature radius R7 of the object side surface of the fourth lens satisfy the following relationship: 0.5<|R2 / R7|≤2.

53.

2. The optical imaging lens assembly according to claim 1, wherein: Half of the diagonal length of the effective pixel area on the imaging plane ImgH is greater than 6.5 mm, and half of the diagonal length of the effective pixel area on the imaging plane ImgH and the effective focal length f of the optical imaging lens group satisfy the following relationship: 1.07≤ImgH / f≤1.

31.

3. The optical imaging lens assembly according to claim 1, wherein: The air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side of the seventh lens satisfy the following: 0.40≤T45 / R9+T56 / R11+T67 / R13≤0.

61.

4. The optical imaging lens assembly according to claim 1, wherein: The dispersion coefficient V1 of the first lens, the effective focal length f1 of the first lens, the dispersion coefficient V2 of the second lens, and the effective focal length f2 of the second lens satisfy the following relationship: 7.68≤V1 / f1+V2 / f2≤9.

67.

5. The optical imaging lens assembly according to claim 1, wherein: The refractive index N1 of the first lens, the center thickness CT1 of the first lens, the refractive index N2 of the second lens, and the center thickness CT2 of the second lens satisfy the following relationship: 5.78≤N1 / CT1+N2 / CT2≤7.

13.

6. The optical imaging lens assembly according to claim 1, wherein: The center thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side of the fifth lens, the center thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side of the sixth lens, the center thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side of the seventh lens satisfy the following: 0.32≤CT5 / DT51+CT6 / DT61+CT7 / DT71≤0.

57.

7. The optical imaging lens assembly according to claim 1, wherein: The sum of the center thickness of the first lens and the center thickness of the second lens is greater than the sum of the center thickness of the sixth lens and the center thickness of the seventh lens, and the center thickness CT1 of the first lens, the center thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the center thickness CT6 of the sixth lens, the center thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.22≤(CT1+CT2)*10 / f12+(CT6+CT7)*10 / f67≤1.

11.

8. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The effective focal length f1 of the first lens satisfies: |f1|<|fi|, and the effective focal length f6 of the sixth lens satisfies: |f6|<|fi|, where fi is the effective focal length of the i-th lens, and i is 2, 3, 4, or 5.

9. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The refractive index N3 of the third lens, the curvature radius R6 of the image side surface of the third lens, the refractive index N4 of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy the following relationship: 0.15≤N3 / R6-N4 / R8≤0.

27.

10. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The edge thickness ETi of the i-th lens and the center thickness CTi of the i-th lens satisfy the following: 0.38≤ETi / CTi≤2.82, where i is a value selected from 1, 2, 3, 4, 5, 6, and 7.

11. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The ratio of the edge thickness to the center thickness of the first lens is smaller than the ratio of the edge thickness to the center thickness of the remaining lenses of the optical imaging lens group. The edge thickness ET5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy: 0.99≤ET5 / CT5≤1.

6. The center thickness CT7 of the seventh lens and the edge thickness ET7 of the seventh lens satisfy: 1 <ET7 / CT7≤2.82。 12. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The effective focal length f3 of the third lens, the maximum effective radius DT32 of the image side of the third lens, the effective focal length f4 of the fourth lens, the maximum effective radius DT42 of the image side of the fourth lens, the effective focal length f5 of the fifth lens, and the maximum effective radius DT52 of the image side of the fifth lens satisfy the following: -5.48≤(f3 / DT32+f4 / DT42+f5 / DT52) / 3≤-3.

29.

13. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The absolute value of the radius of curvature R14 of the image side surface of the seventh lens is less than 2, and the absolute value of the radius of curvature of the image side surface of the seventh lens is smaller than the absolute value of the radius of curvature of the object side surface or the image side surface of the remaining lenses of the optical imaging lens group.

14. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The center thickness CT3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the optical imaging lens group, the curvature radius R5 of the object side of the third lens, the curvature radius R6 of the image side of the third lens, the center thickness CT4 of the fourth lens, the air gap T34 between the third lens and the fourth lens on the optical axis, the curvature radius R7 of the object side of the fourth lens, and the curvature radius R8 of the image side of the fourth lens satisfy the following: -0.11≤(CT3+T34) / (R5-R6)-(CT4+T34) / (R7+R8)≤1.

38.

15. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The distance T14 from the object side of the first lens to the image side of the fourth lens on the optical axis of the optical imaging lens group, the combined focal length f1234 of the first to fourth lenses, the distance T57 from the object side of the fifth lens to the image side of the seventh lens on the optical axis, and the combined focal length f567 of the fifth to seventh lenses satisfy the following: 0.34≤T14 / f1234+T57 / f567≤0.

52.

16. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The on-axis distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis of the optical imaging lens group to the effective radius vertex of the image side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the on-axis distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy the following: -0.74≤SAG52 / R10+SAG62 / R12+SAG72 / R14≤-0.

19.

17. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: When the absolute value of the effective focal length of the i-th lens is less than 10, the following is satisfied: -1.9≤fi / f≤1.33, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i is a value selected from 1, 2, 3, 4, 5, 6, and 7.

18. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The first lens is made of glass.

19. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy the following relationship: -3.17≤R7 / R8≤-0.34; the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy the following relationship: 0.11≤R6 / R5≤0.

52.

20. The optical imaging lens assembly according to any one of claims 1 to 7, characterized in that: The effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: -1.16≤f1 / f7≤-0.52; the effective focal length f of the optical imaging lens group and the effective focal length f1 of the first lens satisfy: 0.75≤f / f1<1.

0.

21. An optical imaging lens assembly, characterized in that: The optical imaging lens set has only seven lenses, which include, from the object side to the image side, the following lenses: a first lens, wherein the focal length of the first lens has a positive sign, and the object side surface of the first lens is a convex surface; a second lens, wherein the focal length sign of the second lens is negative, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; a third lens, wherein the focal length sign of the third lens is negative, the object-side surface of the third lens is convex, and the image-side surface of the third lens is concave; a fourth lens, wherein the focal length sign of the fourth lens is positive, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex; a fifth lens, wherein the focal length sign of the fifth lens is negative, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is concave; a sixth lens, wherein the focal length sign of the sixth lens is positive, the object-side surface of the sixth lens is convex, and the image-side surface of the sixth lens is concave; a seventh lens, wherein the focal length sign of the seventh lens is negative, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave; The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens group, half the diagonal length of the effective pixel area on the imaging surface ImgH, the effective focal length f of the optical imaging lens group, and the effective focal length f4 of the fourth lens satisfy the following: 0.75≤TTL / ImgH-f / f4≤0.83; Half of the diagonal length of the effective pixel area on the imaging plane ImgH is greater than 6.5 mm, and half of the diagonal length of the effective pixel area on the imaging plane ImgH and the effective focal length f of the optical imaging lens assembly satisfy the following relationship: 1.07≤ImgH / f≤1.31; The effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy the following: -1.16≤f1 / f7≤-0.

52.

22. The optical imaging lens assembly according to claim 21, wherein: The air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens group, the curvature radius R9 of the object side of the fifth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the curvature radius R11 of the object side of the sixth lens, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the curvature radius R13 of the object side of the seventh lens satisfy the following: 0.40≤T45 / R9+T56 / R11+T67 / R13≤0.

61.

23. The optical imaging lens assembly according to claim 21, wherein: The dispersion coefficient V1 of the first lens, the effective focal length f1 of the first lens, the dispersion coefficient V2 of the second lens, and the effective focal length f2 of the second lens satisfy the following relationship: 7.68≤V1 / f1+V2 / f2≤9.

67.

24. The optical imaging lens assembly according to claim 21, wherein: The refractive index N1 of the first lens, the center thickness CT1 of the first lens, the refractive index N2 of the second lens, and the center thickness CT2 of the second lens satisfy the following relationship: 5.78≤N1 / CT1+N2 / CT2≤7.

13.

25. The optical imaging lens assembly according to claim 21, wherein: The center thickness CT5 of the fifth lens, the maximum effective radius DT51 of the object side of the fifth lens, the center thickness CT6 of the sixth lens, the maximum effective radius DT61 of the object side of the sixth lens, the center thickness CT7 of the seventh lens, and the maximum effective radius DT71 of the object side of the seventh lens satisfy the following: 0.32≤CT5 / DT51+CT6 / DT61+CT7 / DT71≤0.

57.

26. The optical imaging lens assembly according to claim 21, wherein: The sum of the center thickness of the first lens and the center thickness of the second lens is greater than the sum of the center thickness of the sixth lens and the center thickness of the seventh lens, and the center thickness CT1 of the first lens, the center thickness CT2 of the second lens, the combined focal length f12 of the first lens and the second lens, the center thickness CT6 of the sixth lens, the center thickness CT7 of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.22≤(CT1+CT2)*10 / f12+(CT6+CT7)*10 / f67≤1.

11.

27. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The effective focal length f1 of the first lens satisfies: |f1|<|fi|, and the effective focal length f6 of the sixth lens satisfies: |f6|<|fi|, where fi is the effective focal length of the i-th lens, and i is 2, 3, 4, or 5.

28. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The refractive index N3 of the third lens, the curvature radius R6 of the image side surface of the third lens, the refractive index N4 of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy the following relationship: 0.15≤N3 / R6-N4 / R8≤0.

27.

29. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The edge thickness ETi of the i-th lens and the center thickness CTi of the i-th lens satisfy the following: 0.38≤ETi / CTi≤2.82, where i is a value selected from 1, 2, 3, 4, 5, 6, and 7.

30. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The ratio of the edge thickness to the center thickness of the first lens is smaller than the ratio of the edge thickness to the center thickness of the remaining lenses of the optical imaging lens group. The edge thickness ET5 of the fifth lens and the center thickness CT5 of the fifth lens satisfy: 0.99≤ET5 / CT5≤1.

6. The center thickness CT7 of the seventh lens and the edge thickness ET7 of the seventh lens satisfy: 1 <ET7 / CT7≤2.82。 31. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The effective focal length f3 of the third lens, the maximum effective radius DT32 of the image side of the third lens, the effective focal length f4 of the fourth lens, the maximum effective radius DT42 of the image side of the fourth lens, the effective focal length f5 of the fifth lens, and the maximum effective radius DT52 of the image side of the fifth lens satisfy the following: -5.48≤(f3 / DT32+f4 / DT42+f5 / DT52) / 3≤-3.

29.

32. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: The absolute value of the radius of curvature R14 of the image side surface of the seventh lens is less than 2, and the absolute value of the radius of curvature of the image side surface of the seventh lens is smaller than the absolute value of the radius of curvature of the object side surface or the image side surface of the remaining lenses of the optical imaging lens group.

33. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The center thickness CT3 of the third lens, the air gap T34 between the third lens and the fourth lens on the optical axis of the optical imaging lens group, the curvature radius R5 of the object side of the third lens, the curvature radius R6 of the image side of the third lens, the center thickness CT4 of the fourth lens, the air gap T34 between the third lens and the fourth lens on the optical axis, the curvature radius R7 of the object side of the fourth lens, and the curvature radius R8 of the image side of the fourth lens satisfy the following: -0.11≤(CT3+T34) / (R5-R6)-(CT4+T34) / (R7+R8)≤1.

38.

34. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: The distance T14 from the object side of the first lens to the image side of the fourth lens on the optical axis of the optical imaging lens group, the combined focal length f1234 of the first to fourth lenses, the distance T57 from the object side of the fifth lens to the image side of the seventh lens on the optical axis, and the combined focal length f567 of the fifth to seventh lenses satisfy the following: 0.34≤T14 / f1234+T57 / f567≤0.

52.

35. The optical imaging lens assembly according to any one of claims 21 to 26, characterized in that: The on-axis distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis of the optical imaging lens group to the effective radius vertex of the image side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the on-axis distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy the following: -0.74≤SAG52 / R10+SAG62 / R12+SAG72 / R14≤-0.

19.

36. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: When the absolute value of the effective focal length of the i-th lens is less than 10, the following is satisfied: -1.9≤fi / f≤1.33, where fi is the effective focal length of the i-th lens, f is the effective focal length of the optical imaging lens group, and i is a value selected from 1, 2, 3, 4, 5, 6, and 7.

37. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: The first lens is made of glass.

38. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: The curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens satisfy the following relationship: -3.17≤R7 / R8≤-0.34; the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy the following relationship: 0.11≤R6 / R5≤0.

52.

39. The optical imaging lens assembly according to any one of claims 21 to 26, wherein: The effective focal length f of the optical imaging lens group and the effective focal length f1 of the first lens satisfy the following: 0.75≤f / f1<1.0.

Images