Optical imaging lens group

Abstract

The present invention provides an optical imaging lens assembly. The optical imaging lens assembly includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; and the focal length of the seventh lens is less than zero. The half-diagonal length of the effective pixel area on the imaging plane, ImgH, satisfies the following conditions: ImgH>7.0mm; and the effective focal length f of the optical imaging lens assembly satisfies the following conditions: f / EPD<1.8, relative to the entrance pupil diameter (EPD) of the optical imaging lens assembly. The present invention solves the problem in prior art optical imaging lens assemblies of difficulty in simultaneously achieving a large image plane, a large aperture, and high imaging quality.

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] In recent years, with the improvement of the requirements for the imaging quality of portable electronic products. Electronic products such as mobile phones and tablet computers will become thinner and smaller in size. At the same time, with the improvement of the performance and the reduction of the size of charge-coupled device (CCD) and complementary metal-oxide semiconductor (CMOS) image sensors, the corresponding optical imaging lens group also needs to meet the requirements of high imaging quality. In order to meet the development and user needs, the optical imaging lens group that cooperates with electronic devices needs to have the characteristics of large aperture and large image plane. Although there is an optical imaging lens applied to portable electronic products in the prior art, the imaging clarity of this optical imaging lens is poor in an environment with insufficient light (such as rainy days, dusk, etc.), and it is difficult to achieve the effect of background blurring.

[0003] That is to say, there is a problem that it is difficult to simultaneously take into account large image plane, large aperture and high imaging quality in the optical imaging lens group in the prior art. Summary of the Invention

[0004] The main object of the present invention is to provide an optical imaging lens group to solve the problem that it is difficult to simultaneously take into account large image plane, large aperture and high imaging quality in the optical imaging lens group in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens group, which sequentially includes 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; the focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; the focal length of the seventh lens is less than zero; wherein, half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: ImgH > 7.0 mm; the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: f / EPD < 1.8.

[0006] Furthermore, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 0 < f1 / f5 < 1.0; and / or the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.0 < f7 / f6 < 0.

[0007] Furthermore, a distance TTL from the object side surface of the first lens of the optical imaging lens group to the imaging plane on the optical axis and half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following relationship: TTL / ImgH<1.5.

[0008] Furthermore, an air gap between the third lens and the fourth lens on the optical axis is greater than 0.5 mm and less than 1.0 mm, and an air gap T34 between the third lens and the fourth lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a refractive index N3 of the third lens and a refractive index N4 of the fourth lens satisfy the following relationship: (N3-1) / (CT3+T34)+(N4-1) / (T34+CT4)<1.5.

[0009] Furthermore, the air gap between the second lens and the third lens on the optical axis is less than 0.3 mm, and the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum effective radius DT21 of the object side surface of the second lens, the maximum effective radius DT22 of the image side surface of the second lens, the maximum effective radius DT31 of the object side surface of the third lens, and the maximum effective radius DT32 of the image side surface of the third lens satisfy the following relationship: 1.0<(DT21+DT22) / (CT2+T23)-(DT31+DT32) / (T23+CT3)<2.0.

[0010] Furthermore, the distance TL13 on the optical axis from the object side surface of the first lens to the image side surface of the third lens, TL13=CT1+T12+CT2+T23+CT3, the distance TL45 on the optical axis from the object side surface of the fourth lens to the image side surface of the fifth lens, TL45=CT4+T45+CT5, the combined focal length f123 of the first lens, the second lens and the third lens, the combined focal length f45 of the fourth lens and the fifth lens, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 3.6<1 / (TL13 / f123+TL45 / f45)<4.6.

[0011] Furthermore, the radius of curvature R1 of the object side surface of the first lens satisfies: R1<6.0mm; the radius of curvature R3 of the object side surface of the second lens satisfies: R3<6.0mm; the radius of curvature R4 of the image side surface of the second lens satisfies: R4<6.0mm; the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: R2 / 3>R1; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: R2 / 3>R3; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R4 of the image side surface of the second lens satisfy: R2 / 3>R4.

[0012] Furthermore, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: 2.5<(R1+R2) / f1+(R3+R4) / f2<4.0.

[0013] Furthermore, the edge thickness of the seventh lens is greater than the center thickness of the seventh lens on the optical axis, and the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy the following relationship: -1.0 <ET7 / f7-ET6 / f6<0。

[0014] Furthermore, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.5<(SAG41+SAG52)*(N4+N5) / f45<0.

[0015] Furthermore, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, a curvature radius R9 of the object-side surface of the fifth lens, a curvature radius R10 of the image-side surface of the fifth lens, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens satisfy the following relationship: -1.0<(R7-R8) / f4+(R9-R10) / f5<0.

[0016] Furthermore, the combined focal length f123 of the first lens, the second lens, and the third lens, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the maximum effective radius DT31 of the object side surface of the third lens satisfy the following conditions: 1.0 <f123 / (DT11+DT21+DT31)<2.0。

[0017] Furthermore, a curvature radius R12 of the image-side surface of the sixth lens, a curvature radius R14 of the image-side surface of the seventh lens, and a combined focal length f67 of the sixth lens and the seventh lens satisfy the following relationship: -0.5<(R12+R14) / f67<0.

[0018] Furthermore, the center thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, the curvature radius R12 of the image-side surface of the sixth lens, and the curvature radius R13 of the object-side surface of the seventh lens satisfy the following relationship: 0.1<(CT6+T67+CT7) / (R12+R13)<1.5.

[0019] Furthermore, the combined focal length f56 of the fifth and sixth lenses, the maximum effective radius DT52 of the image side surface of the fifth lens, and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy the following relationship: 0.5<(DT52+DT61) / f56<1.5.

[0020] Furthermore, the effective focal length f of the optical imaging lens group, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following relationship: 0.5 <f / f1+f / f2+f / f3<1.0。

[0021] Furthermore, the entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side surface of the first lens, and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy the following relationship: 2.3 <EPD / DT11+EPD / DT72<3.0。

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

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

[0024] Furthermore, the optical imaging lens group also includes a stop, which is located on the object side of the first lens.

[0025] Furthermore, the focal length of the fourth lens is less than zero.

[0026] According to another aspect of the present invention, an optical imaging lens group is provided, which sequentially includes 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; the focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; the focal length of the seventh lens is less than zero; wherein, half of the diagonal length of the effective pixel region on the imaging surface ImgH satisfies: ImgH > 7.0 mm; the entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side surface of the first lens, and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy: 2.3 < EPD / DT11 + EPD / DT72 < 3.0.

[0027] Further, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 0 < f1 / f5 < 1.0; and / or the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.0 < f7 / f6 < 0.

[0028] Further, the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: f / EPD < 1.8; the distance TTL on the optical axis from the object side surface of the first lens of the optical imaging lens group to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: TTL / ImgH < 1.5.

[0029] Further, the air gap on the optical axis between the third lens and the fourth lens is greater than 0.5 mm and less than 1.0 mm, and the air gap T34 on the optical axis between the third lens and the fourth lens, the central thickness CT3 on the optical axis of the third lens, the central thickness CT4 on the optical axis of the fourth lens, the refractive index N3 of the third lens and the refractive index N4 of the fourth lens satisfy: (N3 - 1) / (CT3 + T34) + (N4 - 1) / (T34 + CT4) < 1.5.

[0030] Further, the air gap on the optical axis between the second lens and the third lens is less than 0.3 mm, and the central thickness CT2 on the optical axis of the second lens, the central thickness CT3 on the optical axis of the third lens, the air gap T23 on the optical axis between the second lens and the third lens, the maximum effective radius DT21 of the object side surface of the second lens, the maximum effective radius DT22 of the image side surface of the second lens, the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT32 of the image side surface of the third lens satisfy: 1.0 < (DT21 + DT22) / (CT2 + T23) - (DT31 + DT32) / (T23 + CT3) < 2.0.

[0031] Furthermore, the distance TL13 on the optical axis from the object side surface of the first lens to the image side surface of the third lens, TL13=CT1+T12+CT2+T23+CT3, the distance TL45 on the optical axis from the object side surface of the fourth lens to the image side surface of the fifth lens, TL45=CT4+T45+CT5, the combined focal length f123 of the first lens, the second lens and the third lens, the combined focal length f45 of the fourth lens and the fifth lens, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 3.6<1 / (TL13 / f123+TL45 / f45)<4.6.

[0032] Furthermore, the radius of curvature R1 of the object side surface of the first lens satisfies: R1<6.0mm; the radius of curvature R3 of the object side surface of the second lens satisfies: R3<6.0mm; the radius of curvature R4 of the image side surface of the second lens satisfies: R4<6.0mm; the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: R2 / 3>R1; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: R2 / 3>R3; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R4 of the image side surface of the second lens satisfy: R2 / 3>R4.

[0033] Furthermore, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: 2.5<(R1+R2) / f1+(R3+R4) / f2<4.0.

[0034] Furthermore, the edge thickness of the seventh lens is greater than the center thickness of the seventh lens on the optical axis, and the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy the following relationship: -1.0 <ET7 / f7-ET6 / f6<0。

[0035] Furthermore, the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.5<(SAG41+SAG52)*(N4+N5) / f45<0.

[0036] Furthermore, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, a curvature radius R9 of the object-side surface of the fifth lens, a curvature radius R10 of the image-side surface of the fifth lens, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens satisfy the following relationship: -1.0<(R7-R8) / f4+(R9-R10) / f5<0.

[0037] Furthermore, the combined focal length f123 of the first lens, the second lens, and the third lens, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the maximum effective radius DT31 of the object side surface of the third lens satisfy the following conditions: 1.0 <f123 / (DT11+DT21+DT31)<2.0。

[0038] Furthermore, a curvature radius R12 of the image-side surface of the sixth lens, a curvature radius R14 of the image-side surface of the seventh lens, and a combined focal length f67 of the sixth lens and the seventh lens satisfy the following relationship: -0.5<(R12+R14) / f67<0.

[0039] Furthermore, the center thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, the curvature radius R12 of the image-side surface of the sixth lens, and the curvature radius R13 of the object-side surface of the seventh lens satisfy the following relationship: 0.1<(CT6+T67+CT7) / (R12+R13)<1.5.

[0040] Furthermore, the combined focal length f56 of the fifth and sixth lenses, the maximum effective radius DT52 of the image side surface of the fifth lens, and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy the following relationship: 0.5<(DT52+DT61) / f56<1.5.

[0041] Furthermore, the effective focal length f of the optical imaging lens group, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following relationship: 0.5 <f / f1+f / f2+f / f3<1.0。

[0042] Furthermore, the object-side surface of the first lens is convex, and the image-side surface is concave; the object-side surface of the second lens is convex, and the image-side surface is concave; the object-side surface of the fourth lens is convex, and the image-side surface is concave.

[0043] Furthermore, the object-side surface of the fifth lens is concave, and the image-side surface is convex; the image-side surface of the sixth lens is convex; and the object-side surface of the seventh lens is concave, and the image-side surface is concave.

[0044] Furthermore, the optical imaging lens group also includes a stop, which is located on the object side of the first lens.

[0045] Furthermore, the focal length of the fourth lens is less than zero.

[0046] Applying the technical solution of the present invention, the optical imaging lens group includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; and the focal length of the seventh lens is less than zero; wherein, half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: ImgH>7.0mm; and the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: f / EPD<1.8.

[0047] By limiting the focal lengths of the first, second, fifth, sixth, and seventh lenses, it is beneficial to ensure the rational distribution of the system's optical power and improve image quality. By limiting the effective pixel area on the imaging plane to half the diagonal length, the optical imaging lens group has a large image plane, improving shooting quality. By limiting the ratio between the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group, the optical imaging lens group's large aperture and large diameter characteristics are simultaneously achieved, which is beneficial for enhancing background blur and highlighting the subject in portrait photography. At the same time, the amount of light transmitted is increased, which is beneficial for the optical imaging lens group's imaging quality in dark environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] 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:

[0049] Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Example 1 of the present invention is shown;

[0050] 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;

[0051] Figure 6 A schematic structural diagram of an optical imaging lens assembly according to Example 2 of the present invention is shown;

[0052] 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;

[0053] Figure 11 A schematic structural diagram of an optical imaging lens assembly according to Example 3 of the present invention is shown;

[0054] 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;

[0055] Figure 16 Schematic diagram of the structure of the optical imaging lens assembly of Example 4 of the present invention is shown;

[0056] Figures 17 to 20 Shown respectively Figure 16 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group;

[0057] Figure 21 A schematic structural diagram of an optical imaging lens assembly according to Example 5 of the present invention is shown;

[0058] 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;

[0059] Figure 26 Schematic diagram of the structure of the optical imaging lens assembly of Example 6 of the present invention is shown;

[0060] 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.

[0061] The above drawings include the following reference numerals:

[0062] 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;

[0063] 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, color filter; S15, object-side surface of the color filter; S16, image-side surface of the color filter; S17, imaging surface. DETAILED DESCRIPTION

[0064] 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.

[0065] 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.

[0066] 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.

[0067] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0068] 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.

[0069] 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 close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of common knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0070] In order to solve the problem in the prior art that it is difficult to simultaneously achieve a large image surface, a large aperture and high imaging quality in an optical imaging lens assembly, the present invention provides an optical imaging lens assembly.

[0071] Example 1

[0072] like Figures 1 to 30 As shown, the optical imaging lens group includes 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; the focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; and the focal length of the seventh lens is less than zero; wherein, half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: ImgH>7.0mm; the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: f / EPD<1.8.

[0073] By limiting the focal lengths of the first, second, fifth, sixth, and seventh lenses, it is beneficial to ensure the rational distribution of the system's optical power and improve image quality. By limiting the effective pixel area on the imaging plane to half the diagonal length, the optical imaging lens group has a large image plane, improving shooting quality. By limiting the ratio between the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group, the optical imaging lens group's large aperture and large diameter characteristics are simultaneously achieved, which is beneficial for enhancing background blur and highlighting the subject in portrait photography. At the same time, the amount of light transmitted is increased, which is beneficial for the optical imaging lens group's imaging quality in dark environments.

[0074] Preferably, half of the diagonal length of the effective pixel region on the imaging surface, ImgH, satisfies: 7.00 mm ≤ ImgH ≤ 7.71 mm. Preferably, the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: 1.63 ≤ f / EPD ≤ 1.81.

[0075] In this embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 0 < f1 / f5 < 1.0; the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.0 < f7 / f6 < 0. By controlling the ratios of the effective focal length f1 of the first lens to the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens to the effective focal length f6 of the sixth lens within a certain range, it is possible to reasonably control the incident angle of the chief ray of each field of view of the optical imaging lens group on the imaging surface, meeting the requirements of the chief ray incident angle in the optical system design. Preferably, 0.44 ≤ f1 / f5 ≤ 0.50; -0.65 ≤ f7 / f6 ≤ -0.47.

[0076] In this embodiment, the distance TTL on the optical axis from the object side surface of the first lens of the optical imaging lens group to the imaging surface and half of the diagonal length of the effective pixel region on the imaging surface, ImgH, satisfy: TTL / ImgH < 1.5. By controlling the ratio of the distance TTL on the optical axis from the object side surface of the first lens of the optical imaging lens group to the imaging surface to half of the diagonal length of the effective pixel region on the imaging surface within a certain range, while achieving a large imaging surface, it is possible to control the total length of the optical system, compress the size of the optical imaging lens group, and achieve miniaturization. Preferably, 1.33 ≤ TTL / ImgH ≤ 1.41.

[0077] In this embodiment, the air gap on the optical axis between the third lens and the fourth lens is greater than 0.5 mm and less than 1.0 mm, and the air gap T34 on the optical axis between the third lens and the fourth lens, the central thickness CT3 on the optical axis of the third lens, the central thickness CT4 on the optical axis of the fourth lens, the refractive index N3 of the third lens, and the refractive index N4 of the fourth lens satisfy: (N3 - 1) / (CT3 + T34) + (N4 - 1) / (T34 + CT4) < 1.5. By restricting the air gap on the optical axis between the third lens and the fourth lens, the central thickness on the optical axis of the third lens, the central thickness on the optical axis of the fourth lens, the refractive index of the third lens, and the refractive index of the fourth lens, it is possible to achieve a good distribution of the optical power of the optical imaging lens group, thereby enabling it to have good imaging quality. Preferably, 1.14 ≤ (N3 - 1) / (CT3 + T34) + (N4 - 1) / (T34 + CT4) ≤ 1.39.

[0078] In this embodiment, the air gap between the second lens and the third lens on the optical axis is less than 0.3 mm, and the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum effective radius DT21 of the object side of the second lens, the maximum effective radius DT22 of the image side of the second lens, the maximum effective radius DT31 of the object side of the third lens, and the maximum effective radius DT32 of the image side of the third lens satisfy the following conditions: 1.0 < (DT21 + DT22) / (CT2 + T23) - (DT31 + DT32) / (T23 + CT3) < 2.0. Meeting this conditional expression can ensure that the ratio of the outer diameter and center thickness of the second lens and the third lens is controlled within a reasonable range, ensure lens strength, reduce the risk of group deformation, and improve yield. Preferably, 0.93 ≤ (DT21 + DT22) / (CT2 + T23) - (DT31 + DT32) / (T23 + CT3) ≤ 1.91.

[0079] In this embodiment, the distance TL13 on the optical axis from the object side surface of the first lens to the image side surface of the third lens, TL13=CT1+T12+CT2+T23+CT3, the distance TL45 on the optical axis from the object side surface of the fourth lens to the image side surface of the fifth lens, TL45=CT4+T45+CT5, the combined focal length f123 of the first, second, and third lenses, the combined focal length f45 of the fourth and fifth lenses, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T12 between the first and second lenses on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: 3.6<1 / (TL13 / f123+TL45 / f45)<4.6. By constraining the above parameters, the field curvature and distortion of the system can be effectively guaranteed, thereby ensuring good imaging quality in its off-axis field of view. Preferably, 3.84≤1 / (TL13 / f123+TL45 / f45)≤4.59.

[0080] In this embodiment, the radius of curvature R1 of the object side surface of the first lens satisfies: R1 < 6.0 mm; the radius of curvature R3 of the object side surface of the second lens satisfies: R3 < 6.0 mm; the radius of curvature R4 of the image side surface of the second lens satisfies: R4 < 6.0 mm; between the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens, it satisfies: R2 / 3 > R1; between the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens, it satisfies: R2 / 3 > R3; between the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R4 of the image side surface of the second lens, it satisfies: R2 / 3 > R4. By controlling the radius of curvature of the object side surface of the first lens, the radius of curvature of the object side surface of the second lens, and the radius of curvature of the image side surface of the second lens, the optical power from the first lens to the second lens can be reasonably distributed, the imaging quality can be improved, and at the same time, the structural size can be ensured to be compact.

[0081] In this embodiment, between the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the first lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens, it satisfies: 2.5 < (R1 + R2) / f1 + (R3 + R4) / f2 < 4.0. Satisfying this conditional expression can reasonably distribute the optical power from the first lens to the second lens, improve the imaging quality, and at the same time ensure the structural size is compact. Preferably, 2.30 ≤ (R1 + R2) / f1 + (R3 + R4) / f2 ≤ 3.71.

[0082] In this embodiment, the edge thickness of the seventh lens is greater than the central thickness of the seventh lens on the optical axis. Between the edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens, it satisfies: -'1.0 < ET7 / f7 - ET6 / f6 < 0. Satisfying this conditional expression can control the shape of the sixth and seventh lenses and the strength of the lens abutting position, which is beneficial to the stability of the large-aperture lens assembly. Preferably, -0.45 ≤ ET7 / f7 - ET6 / f6 ≤ -0.26.

[0083] In this embodiment, the axial distance SAG41 between the intersection point of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, the axial distance SAG52 between the intersection point of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.5 < (SAG41 + SAG52) * (N4 + N5) / f45 < 0. Satisfying this conditional expression can control the fourth lens and the fifth lens to obtain a better focal power distribution and improve the imaging quality of the system. Preferably, -0.18 ≤ (SAG41 + SAG52) * (N4 + N5) / f45 ≤ -0.13.

[0084] In this embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -1.0 < (R7 - R8) / f4 + (R9 - R10) / f5 < 0. Satisfying this conditional expression can control the contribution rate of the fifth-order spherical aberration to a certain extent and keep the fifth-order spherical aberration of the fourth lens and the fifth lens within a reasonable range. Preferably, -0.93 ≤ (R7 - R8) / f4 + (R9 - R10) / f5 ≤ -0.57.

[0085] In this embodiment, the combined focal length f123 of the first lens, the second lens and the third lens, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens and the maximum effective radius DT31 of the object side surface of the third lens satisfy: 1.0 < f123 / (DT11 + DT21 + DT31) < 2.0. Satisfying this conditional expression can make the optical system have reasonable vignetting, improve the off-axis zone aberration of the lens and improve the imaging quality. Preferably, 1.49 ≤ f123 / (DT11 + DT21 + DT31) ≤ 1.69.

[0086] In this embodiment, the radius of curvature R12 of the image side surface of the sixth lens, the radius of curvature R14 of the image side surface of the seventh lens and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5 < (R12 + R14) / f67 < 0. Satisfying this conditional expression can control the shapes of the sixth lens and the seventh lens and is beneficial to the forming stability of the sixth lens and the seventh lens. Preferably, -0.36 ≤ (R12 + R14) / f67 ≤ -0.12.

[0087] In this embodiment, the central thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, and the curvature radius R12 of the image side of the sixth lens and the curvature radius R13 of the object side of the seventh lens satisfy: 0.1 < (CT6 + T67 + CT7) / (R12 + R13) < 1.5. Satisfying this conditional formula enables better optical power distribution for the sixth lens and the seventh lens, and is also conducive to constraining the shapes of the sixth lens and the seventh lens, thereby improving the imaging quality of the system. Preferably, 0.67 ≤ (CT6 + T67 + CT7) / (R12 + R13) ≤ 1.09.

[0088] In this embodiment, the combined focal length f56 of the fifth lens and the sixth lens, the maximum effective radius DT52 of the image side of the fifth lens, and the maximum effective radius DT61 of the object side of the sixth lens satisfy: 0.5 < (DT52 + DT61) / f56 < 1.5. Satisfying this conditional formula is conducive to the reasonable distribution of the optical power of the fifth lens and the sixth lens, and is also conducive to improving the imaging quality of the system. Preferably, 0.94 ≤ (DT52 + DT61) / f56 ≤ 1.16.

[0089] In this embodiment, the effective focal length f of the optical imaging lens group, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: 0.5 < f / f1 + f / f2 + f / f3 < 1.0. Satisfying this conditional formula enables better optical power distribution for the first lens, the second lens, and the third lens and improves the imaging quality of the system. Preferably, 0.62 ≤ f / f1 + f / f2 + f / f3 ≤ 0.71.

[0090] [[ID=X]]In this embodiment, the entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side of the first lens, and the maximum effective radius DT72 of the image side of the seventh lens satisfy: 2.3 < EPD / DT11 + EPD / DT72 < 3.0. By constraining the relationship between the entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side of the first lens, and the maximum effective radius DT72 of the image side of the seventh lens, the system can have the characteristics of a large aperture while reducing the step difference and improving the assembly stability of the lens group. Preferably, 2.53 ≤ EPD / DT11 + EPD / DT72 ≤ 2.86.

[0091] In this embodiment, the object side of the first lens is convex, and the image side is concave; the object side of the second lens is convex, and the image side is concave; the object side of the fourth lens is convex, and the image side is concave. By constraining the surface types of the first lens, the second lens, and the fourth lens, the distortion contribution of each lens can be controlled within a reasonable range, avoiding the need for后期软件调试.

[0092] In this embodiment, the fifth lens has a concave object-side surface and a convex image-side surface; the sixth lens has a convex image-side surface; and the seventh lens has a concave object-side surface and a concave image-side surface. By constraining the surface shapes of the fifth, sixth, and seventh lenses, the lens distortion contribution is controlled within a reasonable range, eliminating the need for later software debugging.

[0093] In this embodiment, the optical imaging lens assembly further includes an aperture, which is located on the object side of the first lens. Placing the aperture on the object side of the first lens facilitates the aperture to effectively converge light entering the optical system, ensuring a large light flux.

[0094] In this embodiment, the focal length of the fourth lens is less than 0. By controlling the focal length of the fourth lens to be less than 0, it is beneficial to reasonably distribute the optical power of the fourth lens.

[0095] Example 2

[0096] like Figures 1 to 30 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the focal length of the first lens is greater than zero; the focal length of the second lens is less than zero; the focal length of the fifth lens is greater than zero; the focal length of the sixth lens is greater than zero; and the focal length of the seventh lens is less than zero; wherein, half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfies: ImgH>7.0mm; the entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side of the first lens, and the maximum effective radius DT72 of the image side of the seventh lens satisfy: 2.3 <EPD / DT11+EPD / DT72<3.0。

[0097] By limiting the focal lengths of the first, second, fifth, sixth, and seventh lenses, the system's optical power is optimally distributed, improving imaging quality. By constraining the effective pixel area on the imaging plane to half its diagonal length, the optical imaging lens assembly achieves a large image plane, improving image quality. By constraining the relationship between the optical imaging lens assembly's entrance pupil diameter (EPD), the maximum effective radius (DT11) of the object side of the first lens, and the maximum effective radius (DT72) of the image side of the seventh lens, the system achieves a large aperture while minimizing step differences and improving lens assembly stability.

[0098] Preferably, 7.00 mm ≤ ImgH ≤ 7.71 mm. Preferably, 2.53 ≤ EPD / DT11 + EPD / DT72 ≤ 2.86.

[0099] In this embodiment, the following conditions are satisfied between the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens: 0 < f1 / f5 < 1.0; and / or the following condition is satisfied between the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens: -1.0 < f7 / f6 < 0. By controlling the ratios of the effective focal length f1 of the first lens to the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens to the effective focal length f6 of the sixth lens within a certain range, a reasonable control of the incident angle of the chief ray of each field of view of the optical imaging lens group on the imaging surface can be achieved, meeting the requirements of the incident angle of the chief ray in the optical system design. Preferably, 0.44 ≤ f1 / f5 ≤ 0.50; -0.65 ≤ f7 / f6 ≤ -0.47.

[0100] In this embodiment, the following condition is satisfied between the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group: f / EPD < 1.8. By restricting the ratio of the effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group, the characteristics of a large aperture and a large diameter of the optical imaging lens group can be simultaneously achieved, which is beneficial to enhancing the background blurring and highlighting the subject during portrait shooting; at the same time, the light transmission amount is increased, which is beneficial to the imaging quality of the optical imaging lens group in a relatively dark environment. Preferably, 1.63 ≤ f / EPD ≤ 1.81.

[0101] In this embodiment, the following condition is satisfied between the distance TTL on the optical axis from the object side surface of the first lens of the optical imaging lens group to the imaging surface and half of the diagonal length ImgH of the effective pixel area on the imaging surface: TTL / ImgH < 1.5. By controlling the ratio of the distance TTL on the optical axis from the object side surface of the first lens of the optical imaging lens group to the imaging surface to half of the diagonal length ImgH of the effective pixel area on the imaging surface within a certain range, while achieving a large image surface, the total length of the optical system can be controlled, the size of the optical imaging lens group can be compressed, and miniaturization can be achieved. Preferably, 1.33 ≤ TTL / ImgH ≤ 1.41.

[0102] In this embodiment, the air spacing between the third and fourth lenses on the optical axis is greater than 0.5 mm and less than 1.0 mm. The air spacing T34 between the third and fourth lenses on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the refractive index N3 of the third lens, and the refractive index N4 of the fourth lens satisfy the following relationship: (N3-1) / (CT3+T34)+(N4-1) / (T34+CT4)<1.5. By constraining the air spacing between the third and fourth lenses on the optical axis, the center thickness of the third lens on the optical axis, the center thickness of the fourth lens on the optical axis, the refractive index of the third lens, and the refractive index of the fourth lens, the optical imaging lens assembly can achieve good optical power distribution, thereby achieving good imaging quality. Preferably, 1.14≤(N3-1) / (CT3+T34)+(N4-1) / (T34+CT4)≤1.39.

[0103] In this embodiment, the air gap between the second lens and the third lens on the optical axis is less than 0.3 mm, and the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum effective radius DT21 of the object side of the second lens, the maximum effective radius DT22 of the image side of the second lens, the maximum effective radius DT31 of the object side of the third lens, and the maximum effective radius DT32 of the image side of the third lens satisfy the following conditions: 1.0 < (DT21 + DT22) / (CT2 + T23) - (DT31 + DT32) / (T23 + CT3) < 2.0. Meeting this conditional expression can ensure that the ratio of the outer diameter and center thickness of the second lens and the third lens is controlled within a reasonable range, ensure lens strength, reduce the risk of group deformation, and improve yield. Preferably, 0.93 ≤ (DT21 + DT22) / (CT2 + T23) - (DT31 + DT32) / (T23 + CT3) ≤ 1.91.

[0104] In this embodiment, the distance TL13 on the optical axis from the object side surface of the first lens to the image side surface of the third lens, TL13=CT1+T12+CT2+T23+CT3, the distance TL45 on the optical axis from the object side surface of the fourth lens to the image side surface of the fifth lens, TL45=CT4+T45+CT5, the combined focal length f123 of the first, second, and third lenses, the combined focal length f45 of the fourth and fifth lenses, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T12 between the first and second lenses on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: 3.6<1 / (TL13 / f123+TL45 / f45)<4.6. By constraining the above parameters, the field curvature and distortion of the system can be effectively guaranteed, thereby ensuring good imaging quality in its off-axis field of view. Preferably, 3.84≤1 / (TL13 / f123+TL45 / f45)≤4.59.

[0105] In this embodiment, the radius of curvature R1 of the object side surface of the first lens satisfies: R1<6.0mm; the radius of curvature R3 of the object side surface of the second lens satisfies: R3<6.0mm; the radius of curvature R4 of the image side surface of the second lens satisfies: R4<6.0mm; the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: R2 / 3>R1; the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: R2 / 3>R3; and the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R4 of the image side surface of the second lens satisfy: R2 / 3>R4. By controlling the radius of curvature of the object side surface of the first lens, the radius of curvature of the object side surface of the second lens, and the radius of curvature of the image side surface of the second lens, the optical power of the first lens to the second lens can be reasonably distributed, the imaging quality can be improved, and the structural size can be compacted.

[0106] In this embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy the following relationship: 2.5 < (R1 + R2) / f1 + (R3 + R4) / f2 < 4.0. Meeting this conditional equation allows for a reasonable allocation of optical power from the first lens to the second lens, improving imaging quality while ensuring a compact structure. Preferably, 2.30 ≤ (R1 + R2) / f1 + (R3 + R4) / f2 ≤ 3.71.

[0107] In this embodiment, the edge thickness of the seventh lens is greater than the central thickness of the seventh lens on the optical axis. The edge thickness ET6 of the sixth lens, the edge thickness ET7 of the seventh lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy: -1.0 < ET7 / f7 - ET6 / f6 < 0. Meeting this conditional formula can control the shapes of the sixth and seventh lenses and the strength of the lens bearing positions, which is beneficial to the stability of the large-aperture lens assembly. Preferably, -0.45 ≤ ET7 / f7 - ET6 / f6 ≤ -0.26.

[0108] In this embodiment, the axial distance SAG41 between the intersection point of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens, the axial distance SAG52 between the intersection point of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the combined focal length f45 of the fourth and fifth lenses satisfy: -0.5 < (SAG41 + SAG52) * (N4 + N5) / f45 < 0. Meeting this conditional formula can control the optical power distribution of the fourth and fifth lenses to obtain better results and improve the imaging quality of the system. Preferably, -0.18 ≤ (SAG41 + SAG52) * (N4 + N5) / f45 ≤ -0.13.

[0109] In this embodiment, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: -1.0 < (R7 - R8) / f4 + (R9 - R10) / f5 < 0. Meeting this conditional formula can control the contribution rate of the fifth-order spherical aberration to a certain extent, and make the fifth-order spherical aberration of the fourth and fifth lenses controlled within a reasonable range. Preferably, -0.93 ≤ (R7 - R8) / f4 + (R9 - R10) / f5 ≤ -0.57.

[0110] In this embodiment, the combined focal length f123 of the first, second, and third lenses, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the maximum effective radius DT31 of the object side surface of the third lens satisfy: 1.0 < f123 / (DT11 + DT21 + DT31) < 2.0. Meeting this conditional formula can make the optical system have reasonable vignetting, improve the off-axis zone aberration of the lens, and improve the imaging quality. Preferably, 1.49 ≤ f123 / (DT11 + DT21 + DT31) ≤ 1.69.

[0111] In this embodiment, the radius of curvature R12 of the image side surface of the sixth lens, the radius of curvature R14 of the image side surface of the seventh lens, and the combined focal length f67 of the sixth lens and the seventh lens satisfy: -0.5 < (R12 + R14) / f67 < 0. Satisfying this conditional expression can control the shapes of the sixth lens and the seventh lens, which is beneficial to the molding stability of the sixth lens and the seventh lens. Preferably, -0.36 ≤ (R12 + R14) / f67 ≤ -0.12.

[0112] In this embodiment, the central thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, and the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy: 0.1 < (CT6 + T67 + CT7) / (R12 + R13) < 1.5. Satisfying this conditional expression enables better optical power distribution for the sixth lens and the seventh lens, and is also beneficial to restricting the shapes of the sixth lens and the seventh lens, thereby improving the imaging quality of the system. Preferably, 0.67 ≤ (CT6 + T67 + CT7) / (R12 + R13) ≤ 1.09.

[0113] In this embodiment, the combined focal length f56 of the fifth lens and the sixth lens, and the maximum effective radius DT52 of the image side surface of the fifth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.5 < (DT52 + DT61) / f56 < 1.5. Satisfying this conditional expression is beneficial to the reasonable distribution of the optical power of the fifth lens and the sixth lens, and is conducive to improving the imaging quality of the system. Preferably, 0.94 ≤ (DT52 + DT61) / f56 ≤ 1.16.

[0114] In this embodiment, the effective focal length f of the optical imaging lens group, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: 0.5 < f / f1 + f / f2 + f / f3 < 1.0. Satisfying this conditional expression enables better optical power distribution for the first lens, the second lens, and the third lens, and improves the imaging quality of the system. Preferably, 0.62 ≤ f / f1 + f / f2 + f / f3 ≤ 0.71.

[0115] In this embodiment, the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave. By restricting the surface types of the first lens, the second lens, and the fourth lens, the distortion contribution amounts of each lens are controlled within a reasonable range, avoiding the need for later software debugging.

[0116] In this embodiment, the fifth lens has a concave object-side surface and a convex image-side surface; the sixth lens has a convex image-side surface; and the seventh lens has a concave object-side surface and a concave image-side surface. By constraining the surface shapes of the fifth, sixth, and seventh lenses, the lens distortion contribution is controlled within a reasonable range, eliminating the need for later software debugging.

[0117] In this embodiment, the optical imaging lens assembly further includes an aperture, which is located on the object side of the first lens. Placing the aperture on the object side of the first lens facilitates the aperture to effectively converge light entering the optical system, ensuring a large light flux.

[0118] In this embodiment, the focal length of the fourth lens is less than 0. By controlling the focal length of the fourth lens to be less than 0, it is beneficial to reasonably distribute the optical power of the fourth lens.

[0119] Optionally, the optical imaging lens assembly may further include a color filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0120] The optical imaging lens assembly in this application can use multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens, and the on-axis distance between each lens, the aperture of the optical imaging lens assembly 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 assembly more conducive to production and processing and suitable for portable electronic devices such as smartphones. The above-mentioned optical imaging lens assembly also has the advantages of large aperture, large image surface, and excellent imaging quality, which can meet the needs of miniaturization of smart electronic products.

[0121] In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a more optimized curvature radius, offering advantages in reducing distortion and astigmatism. The use of aspheric lenses minimizes aberrations that occur during imaging, thereby improving image quality.

[0122] Since the aspheric surface is a structure obtained by rotating the curved surface in the meridian plane around the optical axis, it has rotational symmetry. In an ideal optical system, it can well correct the aberrations in the meridian and sagittal planes. At the same time, its unique lens model can provide sufficient space for subsequent related adjustments, making the related structure and assembly process more flexible without excessively reducing the image quality.

[0123] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens assembly can be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, although the embodiments describe seven lenses as an example, the optical imaging lens assembly is not limited to seven lenses. If desired, the optical imaging lens assembly can also include other numbers of lenses.

[0124] The following further describes examples of specific surface shapes and parameters of the optical imaging lens assembly applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0125] It should be noted that any one of the following examples 1 to 6 is applicable to all embodiments of the present application.

[0126] Example 1

[0127] like Figures 1 to 5 As shown, the optical imaging lens group of Example 1 of the present application is described. Figure 1 A schematic diagram of the optical imaging lens group structure of Example 1 is shown.

[0128] like Figure 1 As shown, the optical imaging lens group 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 color filter E8 and an imaging surface S17.

[0129] 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 negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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.

[0130] In this example, the total effective focal length f of the optical imaging lens group is 8.47 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 10.15 mm, and the image height ImgH of the optical imaging lens group is 7.61 mm.

[0131] Table 1 shows the basic structural parameters of the optical imaging lens assembly of Example 1, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0132]

[0133] Table 1

[0134] 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 is not limited to, the following aspherical surface formula:

[0135]

[0136] 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.

[0137] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.2007E-02 1.2294E-02 2.8778E-03 -1.2437E-05 -5.5589E-04 -3.8122E-04 -1.6402E-04 S2 4.1517E-02 1.6632E-02 -4.2408E-03 -2.1492E-04 -5.0746E-04 -6.6206E-05 3.9422E-05 S3 -3.0521E-01 3.9094E-02 4.8319E-03 -1.1136E-03 8.7235E-04 6.2085E-04 1.8766E-04 S4 -2.7089E-01 1.1053E-02 4.1025E-03 -2.9624E-03 2.2081E-04 7.4494E-04 1.8932E-04 S5 4.6223E-01 9.5585E-03 -5.8526E-03 -2.4189E-03 -1.3806E-03 -5.3471E-04 -1.5053E-04 S6 3.8304E-01 2.3172E-02 -2.7554E-03 -4.1448E-04 -3.6111E-04 -4.7065E-04 -2.6389E-04 S7 -4.9424E-01 -1.6472E-02 4.4317E-03 2.0198E-03 5.7553E-05 8.0287E-05 -4.7954E-05 S8 -5.1166E-01 3.5567E-02 1.4706E-02 3.7563E-03 -9.5302E-04 -2.1101E-04 -2.0589E-04 S9 -2.0553E-02 2.8222E-02 -2.9097E-03 2.5341E-03 -9.0578E-04 -1.9493E-04 -6.7439E-05 S10 -3.5115E-01 -1.3338E-02 -3.1367E-03 4.4904E-03 3.7726E-03 1.2496E-03 2.1332E-04 S11 -8.9178E-01 -1.2105E-02 2.9484E-02 6.5993E-03 1.4689E-04 -2.9543E-03 -1.9427E-03 S12 9.1596E-01 1.2977E-01 -4.2412E-02 -3.7738E-02 1.6100E-02 -1.2474E-03 -3.8644E-03 S13 3.7132E-01 5.6313E-01 -1.8109E-01 1.2473E-02 1.1685E-02 -2.5379E-03 -7.0163E-05 S14 -4.8515E+00 6.1869E-01 -1.0173E-01 1.4338E-01 9.6759E-03 2.1353E-02 2.2455E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -9.4528E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -1.6228E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 -7.9103E-06 -4.8642E-06 -7.9197E-07 -2.3088E-06 3.8074E-06 -1.5463E-06 1.6954E-07 S14 4.2094E-03 1.5032E-03 4.0867E-04 8.1951E-05 1.0177E-05 4.1766E-07 0.0000E+00

[0138] Table 2

[0139] 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.

[0140] 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.

[0141] Example 2

[0142] like Figures 6 to 10 As shown, the optical imaging lens assembly of Example 2 of the present application is described. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 6 A schematic diagram of the optical imaging lens group structure of Example 2 is shown.

[0143] like Figure 6 As shown, the optical imaging lens group 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 color filter E8 and an imaging surface S17.

[0144] 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 negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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.

[0145] In this example, the total effective focal length f of the optical imaging lens group is 8.00 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 10.07 mm, and the image height ImgH of the optical imaging lens group is 7.21 mm.

[0146] Table 3 shows the basic structural parameters of the optical imaging lens assembly of Example 2, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0147]

[0148]

[0149] Table 3

[0150] Table 4 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0151] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.5115E-02 1.4664E-02 2.9322E-03 2.2966E-04 -2.1835E-04 -1.1421E-04 -7.9698E-05 S2 4.3528E-02 1.5670E-02 -4.7991E-03 2.0012E-03 2.1457E-04 4.5212E-04 1.7323E-04 S3 -3.2353E-01 3.5306E-02 8.9475E-04 -1.6683E-04 4.6753E-04 4.6459E-04 2.4813E-04 S4 -2.8108E-01 7.6913E-03 -4.0972E-04 -4.0273E-03 -3.0138E-04 -4.6184E-05 -5.7817E-06 S5 4.6664E-01 1.8816E-02 -1.5121E-03 -4.7475E-04 7.2089E-05 -3.0296E-04 -2.0479E-04 S6 3.7466E-01 2.4898E-02 -1.2770E-03 2.7345E-04 2.9997E-04 -1.4918E-04 -1.0701E-04 S7 -5.2325E-01 -2.9237E-02 1.8957E-03 1.9036E-03 3.1615E-04 3.4701E-04 2.3093E-05 S8 -5.3517E-01 2.6950E-02 1.3475E-02 6.6802E-03 6.3017E-04 4.4173E-04 -1.2479E-04 S9 -2.1212E-02 2.4266E-02 -8.5709E-03 5.1418E-03 -7.8780E-04 -8.8888E-05 -3.4155E-05 S10 -3.6612E-01 1.1021E-02 -8.7795E-03 -7.3787E-04 1.7318E-03 7.7316E-04 1.5785E-04 S11 -9.0849E-01 1.9492E-02 2.5940E-02 2.9276E-03 1.9468E-03 4.4597E-04 -3.2323E-04 S12 9.5644E-01 1.7682E-01 -1.6471E-02 -8.1616E-02 1.4936E-02 3.5258E-03 -7.5302E-03 S13 3.7258E-01 6.3677E-01 -2.0061E-01 -6.8771E-02 2.5367E-02 9.1097E-03 9.5617E-05 S14 -5.0281E+00 5.5351E-01 -1.1080E-01 1.1287E-01 -3.1909E-03 9.5587E-03 7.3631E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -3.3477E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -4.8228E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 -6.9939E-03 1.9756E-03 1.1233E-03 3.8058E-04 -1.1684E-03 7.1418E-05 5.5214E-04 S14 1.1309E-02 1.4286E-02 9.2379E-03 7.2330E-03 2.7242E-03 1.2589E-03 0.0000E+00

[0152] Table 4

[0153] 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.

[0154] 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.

[0155] Example 3

[0156] like Figures 11 to 15 As shown, the optical imaging lens group of Example 3 of this application is described. Figure 11 A schematic diagram of the optical imaging lens group structure of Example 3 is shown.

[0157] like Figure 11 As shown, the optical imaging lens group 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 color 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 concave and its image-side surface S6 being concave. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E6 has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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 total effective focal length f of the optical imaging lens group is 8.14 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 10.15 mm, and the image height ImgH of the optical imaging lens group is 7.37 mm.

[0160] Table 5 shows the basic structural parameters of the optical imaging lens assembly of Example 3, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0161]

[0162]

[0163] Table 5

[0164] Table 6 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 3, wherein each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0165] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.7823E-02 1.2441E-02 3.9835E-04 -1.4393E-03 -1.3438E-03 -5.6158E-04 -2.5192E-04 S2 1.9189E-02 2.9116E-02 -9.9064E-03 1.6868E-03 1.3261E-04 7.3607E-04 3.5721E-04 S3 -3.2526E-01 4.1141E-02 4.7740E-03 -1.8440E-03 5.7613E-04 5.7723E-04 2.3517E-04 S4 -2.5632E-01 1.5277E-02 3.4970E-04 -5.7064E-03 6.6970E-04 1.0192E-04 -1.0417E-04 S5 4.8489E-01 1.2479E-02 -5.4746E-03 -6.8091E-04 -1.4456E-04 -3.2725E-04 -2.3486E-04 S6 3.8417E-01 1.4203E-02 -2.2330E-03 3.1386E-04 -2.0886E-04 -2.8810E-04 -8.1397E-05 S7 -5.0697E-01 -2.0381E-02 1.4022E-03 1.1707E-03 -3.1466E-04 5.9030E-05 7.8142E-06 S8 -5.1529E-01 3.7115E-02 1.1738E-02 3.4249E-03 1.3593E-04 2.9499E-04 6.1469E-05 S9 -1.3234E-02 2.8750E-02 -5.4516E-03 2.6711E-03 6.3869E-04 -2.4246E-04 -2.0760E-05 S10 -3.4739E-01 -1.2996E-03 -1.1856E-03 3.8963E-03 3.9336E-03 1.2125E-03 3.9569E-04 S11 -9.0869E-01 -3.4258E-02 2.6193E-02 8.4569E-04 7.3260E-04 -3.1655E-03 -2.4101E-03 S12 7.4374E-01 2.4645E-01 -4.4982E-02 -6.0582E-02 2.1509E-02 -1.0047E-02 -2.3369E-02 S13 3.7222E-01 6.5403E-01 -2.1632E-01 -3.0804E-02 2.1970E-02 -7.2760E-04 -8.3691E-03 S14 -4.0603E+00 5.2236E-01 -7.9869E-03 9.8252E-02 1.7512E-02 1.9351E-02 2.1174E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -1.4187E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -1.0630E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 -3.4913E-03 5.5423E-03 6.8974E-03 4.9296E-03 3.9222E-03 1.9268E-03 1.1898E-03 S14 1.2686E-02 6.9607E-03 -7.6417E-04 -2.5886E-03 -2.1220E-03 -1.0390E-03 0.0000E+00

[0166] Table 6

[0167] 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 field curvature and the sagittal field 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 magnification 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.

[0168] 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.

[0169] Example 4

[0170] like Figures 16 to 20 As shown, the optical imaging lens group of Example 4 of the present application is described. Figure 16 A schematic diagram of the optical imaging lens group structure of Example 4 is shown.

[0171] like Figure 16 As shown, the optical imaging lens group 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 color filter E8 and an imaging surface S17.

[0172] 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 positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E6 has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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.

[0173] In this example, the total effective focal length f of the optical imaging lens group is 7.74 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 9.84 mm, and the image height ImgH of the optical imaging lens group is 7.00 mm.

[0174] Table 7 shows the basic structural parameters of the optical imaging lens assembly of Example 4, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0175]

[0176]

[0177] Table 7

[0178] Table 8 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 4, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0179] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.3460E-02 1.1433E-02 3.2539E-04 -1.4247E-03 -9.6056E-04 -2.7958E-04 -1.0129E-04 S2 4.0884E-02 2.0861E-02 -6.6313E-03 -5.9249E-04 -1.6508E-03 -6.1908E-04 -4.1372E-04 S3 -3.0949E-01 4.3833E-02 6.2481E-03 8.5373E-04 -8.5544E-04 -5.5528E-04 -4.0824E-04 S4 -2.6432E-01 4.0950E-03 2.9676E-03 3.3770E-04 6.5535E-04 1.0833E-04 -6.1476E-07 S5 4.4558E-01 2.1048E-02 -7.0698E-03 -3.2758E-03 -1.9245E-03 -1.0112E-03 -3.1197E-04 S6 3.2595E-01 3.2352E-02 8.9770E-04 1.4774E-03 1.1324E-03 4.2236E-04 7.4092E-05 S7 -5.1800E-01 -2.2621E-02 2.3089E-03 3.5413E-03 1.8442E-03 8.0726E-04 1.7658E-04 S8 -5.0120E-01 4.1670E-02 1.4327E-02 6.3066E-03 1.5156E-03 5.9386E-04 4.7162E-05 S9 -2.2326E-02 2.8223E-02 -2.2914E-03 2.6355E-03 -8.6553E-04 -2.7359E-04 -1.6164E-04 S10 -3.7097E-01 3.9901E-03 -1.5916E-03 1.8572E-03 9.3674E-04 2.1183E-04 6.6792E-05 S11 -9.3616E-01 5.4628E-03 2.9772E-02 1.4502E-02 3.1887E-03 -1.1829E-03 -8.5665E-04 S12 9.7614E-01 1.3307E-01 -4.1201E-02 -4.2232E-02 9.3036E-03 -4.9395E-03 -6.3891E-03 S13 4.3818E-01 5.7701E-01 -1.8612E-01 2.3170E-03 1.1400E-02 -9.8549E-04 2.7041E-03 S14 -4.8149E+00 5.7174E-01 -3.7193E-02 1.2916E-01 -1.7359E-03 2.3009E-03 4.5584E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -1.3943E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -2.5445E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 -2.0495E-03 8.9960E-04 -3.0061E-05 1.0030E-03 9.3423E-05 -3.7860E-04 3.9880E-04 S14 8.7544E-03 1.0698E-02 3.4280E-03 1.4636E-03 -4.0969E-04 -1.5896E-04 0.0000E+00

[0180] Table 8

[0181] 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 indicates 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.

[0182] according to Figures 17 to 20 It can be seen that the optical imaging lens assembly given in Example 4 can achieve good imaging quality.

[0183] Example 5

[0184] like Figures 21 to 25 As shown, the optical imaging lens group of Example 5 of the present application is described. Figure 21 A schematic diagram of the optical imaging lens group structure of Example 5 is shown.

[0185] like Figure 21 As shown, the optical imaging lens group 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 color filter E8 and an imaging surface S17.

[0186] 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 negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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.

[0187] In this example, the total effective focal length f of the optical imaging lens group is 8.37 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 10.15 mm, and the image height ImgH of the optical imaging lens group is 7.55 mm.

[0188] Table 9 shows the basic structural parameters of the optical imaging lens assembly of Example 5, wherein the units of curvature radius, thickness / distance, focal length and effective radius are all millimeters (mm).

[0189]

[0190]

[0191] Table 9

[0192] Table 10 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 5, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0193] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.5734E-02 1.9788E-02 3.1056E-03 -1.0516E-03 -1.2033E-03 -5.4336E-04 -1.9108E-04 S2 4.7384E-02 2.1832E-02 -8.2561E-03 1.5152E-03 -3.8024E-04 3.6179E-04 4.6568E-05 S3 -3.1880E-01 4.8672E-02 6.0249E-03 2.2882E-03 1.8194E-03 1.0007E-03 2.8700E-04 S4 -2.7872E-01 1.0723E-02 5.8090E-03 -1.3561E-03 4.8230E-04 7.9298E-05 7.8795E-05 S5 4.8607E-01 3.5046E-03 -8.7894E-03 -1.2335E-03 -2.0101E-04 -3.2239E-04 -1.3351E-04 S6 3.8142E-01 1.7996E-02 -9.8370E-03 -2.5072E-03 -2.6843E-05 7.7503E-05 1.1939E-05 S7 -4.9974E-01 -2.0175E-02 1.7943E-05 1.9018E-03 8.3872E-04 3.9171E-04 6.5097E-05 S8 -4.9021E-01 5.1477E-02 1.9394E-02 5.3620E-03 2.7434E-04 1.0305E-05 -1.2850E-05 S9 -2.3638E-02 3.2217E-02 4.5680E-03 4.5349E-04 -6.9159E-04 -1.9735E-04 4.0627E-05 S10 -3.3609E-01 2.0103E-02 1.4889E-02 7.5736E-03 3.5577E-03 9.9485E-04 2.5000E-04 S11 -9.6829E-01 -1.8471E-02 7.3095E-02 2.7207E-02 5.4776E-03 -3.8702E-03 -3.0061E-03 S12 9.1693E-01 1.2494E-01 -3.1114E-02 -4.6984E-02 1.3251E-02 -8.5743E-03 -1.0717E-02 S13 4.1031E-01 5.3257E-01 -1.9849E-01 1.3167E-02 2.1633E-02 -5.3972E-03 5.0214E-04 S14 -4.8367E+00 5.3540E-01 -7.9085E-02 1.0240E-01 1.4676E-02 2.4920E-02 1.9804E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -9.2024E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -3.6984E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 3.9437E-05 5.3052E-04 -1.4413E-03 2.5067E-04 3.4263E-04 -1.0780E-04 -3.9714E-05 S14 1.5971E-02 1.6188E-02 1.1271E-02 8.4382E-03 3.9593E-03 1.5640E-03 0.0000E+00

[0194] Table 10

[0195] Figure 22 The 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 indicates 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.

[0196] according to Figures 22 to 25 It can be seen that the optical imaging lens assembly given in Example 5 can achieve good imaging quality.

[0197] Example 6

[0198] like Figures 26 to 30 As shown, the optical imaging lens group of Example 6 of the present application is described. Figure 26 A schematic diagram of the optical imaging lens group structure of Example 6 is shown.

[0199] like Figure 26 As shown, the optical imaging lens group 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 color filter E8 and an imaging surface S17.

[0200] 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 negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive focal power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens has negative focal power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The color 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.

[0201] In this example, the total effective focal length f of the optical imaging lens group is 8.42 mm, the maximum field of view FOV of the optical imaging lens group is 82.7°, the total optical length TTL of the optical imaging lens group is 10.62 mm, and the image height ImgH of the optical imaging lens group is 7.71 mm.

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

[0203]

[0204]

[0205] Table 11

[0206] Table 12 shows the high-order coefficients of each aspheric mirror surface that can be used in Example 6, where each aspheric surface shape can be defined by formula (1) given in Example 1 above.

[0207] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.9097E-02 1.6736E-02 5.0232E-03 1.1539E-03 8.6833E-05 -7.9360E-05 -5.2113E-05 S2 4.8618E-02 1.8448E-02 -5.3099E-03 4.7589E-04 -9.1891E-04 9.6818E-06 -8.5259E-05 S3 -3.1900E-01 4.5348E-02 -2.6038E-03 -6.7619E-04 2.5207E-04 3.5429E-04 2.0616E-05 S4 -2.7420E-01 1.6647E-02 8.7248E-04 -1.8188E-03 2.9670E-04 3.0265E-04 1.2304E-04 S5 4.7563E-01 6.9504E-03 -1.6019E-03 -7.7966E-04 -7.3406E-04 -4.7703E-04 -1.0377E-04 S6 3.7934E-01 2.2513E-02 3.2505E-04 5.3365E-04 2.2793E-04 -1.5940E-04 -9.2339E-05 S7 -5.1126E-01 -1.2927E-02 6.6340E-03 2.6008E-03 2.4564E-04 9.7454E-05 -4.6905E-05 S8 -5.3565E-01 3.3587E-02 1.7310E-02 4.7634E-03 -4.3747E-04 -2.5552E-04 -1.9843E-04 S9 -2.6392E-02 2.4623E-02 -3.2583E-03 3.0488E-03 -8.0247E-04 -3.0420E-04 8.2523E-06 S10 -3.4678E-01 8.9602E-05 -1.1416E-02 2.9142E-03 3.9887E-03 1.1012E-03 3.9937E-05 S11 -8.9394E-01 2.1277E-02 2.6453E-02 1.2872E-02 2.7699E-03 -2.8175E-03 -1.9600E-03 S12 7.9719E-01 2.0369E-01 -3.7166E-02 -4.4781E-02 1.1064E-02 -1.9394E-03 -4.7520E-03 S13 4.5419E-01 5.7710E-01 -1.7861E-01 -1.9678E-02 2.5007E-02 -3.8154E-03 -1.1483E-03 S14 -5.2924E+00 5.6913E-01 -1.2430E-01 7.0689E-02 -2.3888E-02 -1.4566E-03 1.5356E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -5.2875E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -1.9058E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 -3.1283E-04 1.5515E-03 -3.9434E-04 -2.9103E-05 -1.0079E-04 -1.6813E-04 1.3803E-04 S14 3.5646E-03 7.8224E-03 4.4999E-03 4.4657E-03 2.7687E-03 1.3644E-03 0.0000E+00

[0208] Table 12

[0209] 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 indicates 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 magnification 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.

[0210] 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.

[0211] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0212] Conditional / Example 1 2 3 4 5 6 f1 / f5 0.46 0.48 0.44 0.47 0.45 0.50 f7 / f6 -0.56 -0.64 -0.64 -0.65 -0.55 -0.47 TTL / ImgH 1.33 1.40 1.38 1.41 1.34 1.38 (N3-1) / (CT3+T34)+(N4-1) / (T34+CT4) 1.27 1.14 1.17 1.25 1.39 1.15 (DT21+DT22) / (CT2+T23)-(DT31+DT32) / (T23+CT3) 1.08 0.93 1.17 1.63 1.91 1.55 1 / (TL13 / f123+TL45 / f45) 4.36 4.07 4.59 3.84 3.97 4.14 (R1+R2) / f1+(R3+R4) / f2 3.23 3.21 2.30 3.08 3.71 3.62 ET7 / f7-ET6 / f6 -0.26 -0.37 -0.30 -0.27 -0.31 -0.45 (SAG41+SAG52)*(N4+N5) / f45 -0.17 -0.18 -0.14 -0.13 -0.14 -0.18 (R7-R8) / f4+(R9-R10) / f5 -0.67 -0.93 -0.57 -0.84 -0.79 -0.85 f123 / (DT11+DT21+DT31) 1.69 1.61 1.64 1.49 1.51 1.57 (R12+R14) / f67 -0.23 -0.12 -0.36 -0.12 -0.21 -0.21 (CT6+T67+CT7) / (R12+R13) 0.67 0.87 0.26 0.69 0.90 1.09 (DT52+DT61) / f56 0.94 1.16 1.00 1.11 0.96 0.88 f / f1+f / f2+f / f3 0.62 0.63 0.63 0.68 0.71 0.67 EPD / DT11+EPD / DT72 2.86 2.84 2.82 2.53 2.68 2.77

[0213] Table 13

[0214] Table 14 gives the effective focal length f of the optical imaging lens group of Examples 1 to 6, the effective focal length f1 to f7 of each lens, etc.

[0215] Parameters / Examples 1 2 3 4 5 6 f1(mm) 7.84 7.91 8.62 7.85 7.52 7.99 f2(mm) -26.84 -24.21 -90.00 -24.61 -27.94 -25.80 f3(mm) -57.42 -150.00 -36.80 1464.75 -79.46 -150.00 f4(mm) -61.16 -43.43 -54.85 -35.87 -47.50 -46.12 f5(mm) 17.03 16.32 19.47 16.85 16.86 15.99 f6(mm) 9.28 6.96 8.16 7.50 9.31 10.99 f7(mm) -5.22 -4.49 -5.23 -4.91 -5.13 -5.19 f(mm) 8.47 8.00 8.14 7.74 8.37 8.42 TTL(mm) 10.15 10.07 10.15 9.84 10.15 10.62 ImgH(mm) 7.61 7.21 7.37 7.00 7.55 7.71 FOV(°) 82.7 82.7 82.7 82.7 82.7 82.7 f / EPD 1.71 1.63 1.67 1.77 1.81 1.72

[0216] Table 14

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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 group is composed of seven lenses, and the seven lenses include, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; The focal length of the first lens is greater than zero; The focal length of the second lens is less than zero; The focal length of the fourth lens is less than zero; The focal length of the fifth lens is greater than zero; The focal length of the sixth lens is greater than zero; The focal length of the seventh lens is less than zero; The object-side surface of the first lens is convex, and the image-side surface is concave; the object-side surface of the second lens is convex, and the image-side surface is concave; the object-side surface of the fourth lens is convex, and the image-side surface is concave; the object-side surface of the fifth lens is concave, and the image-side surface is convex; the image-side surface of the sixth lens is convex; and the object-side surface of the seventh lens is concave, and the image-side surface is concave; Among them, half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfies: 7.71mm≥ImgH≥7.00mm; the effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy: 1.63≤f / EPD≤1.81; the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: 0.44≤f1 / f5≤0.50; the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -0.65≤f7 / f6≤-0.

47.

2. The optical imaging lens assembly according to claim 1, wherein: The distance TTL from the object side surface of the first lens of the optical imaging lens group to the imaging surface on the optical axis and half the diagonal length of the effective pixel area on the imaging surface ImgH satisfy the following: 1.33≤TTL / ImgH≤1.

41.

3. The optical imaging lens assembly according to claim 1, wherein: An air gap between the third lens and the fourth lens on the optical axis is greater than 0.5 mm and less than 1.0 mm. An air gap T34 between the third lens and the fourth lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a refractive index N3 of the third lens and a refractive index N4 of the fourth lens satisfy the following relationship: 1.14≤(N3-1) / (CT3+T34)+(N4-1) / (T34+CT4)≤1.

39.

4. The optical imaging lens assembly according to claim 1, wherein: An air gap between the second lens and the third lens on the optical axis is less than 0.3 mm, and the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum effective radius DT21 of the object side surface of the second lens, the maximum effective radius DT22 of the image side surface of the second lens, the maximum effective radius DT31 of the object side surface of the third lens, and the maximum effective radius DT32 of the image side surface of the third lens satisfy the following: 0.93≤(DT21+DT22) / (CT2+T23)-(DT31+DT32) / (T23+CT3)≤1.

91.

5. The optical imaging lens assembly according to claim 1, wherein: The distance TL13 from the object side of the first lens to the image side of the third lens on the optical axis, TL13=CT1+T12+CT2+T23+CT3, the distance TL45 from the object side of the fourth lens to the image side of the fifth lens on the optical axis, TL45=CT4+T45+CT5, the combined focal length f123 of the first lens, the second lens and the third lens, the combined focal length f45 of the fourth lens and the fifth lens, the center thickness CT1 of the first lens on the optical axis, the thickness of the second lens The center thickness CT2 of the first lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 3.84≤1 / (TL13 / f123+TL45 / f45)<4.

6.

6. The optical imaging lens assembly according to claim 1, wherein: The curvature radius R1 of the object side surface of the first lens satisfies: 3.6089 mm ≤ R1 ≤ 3.8257 mm; The curvature radius R3 of the object side surface of the second lens satisfies: 4.9391 mm ≤ R3 ≤ 5.6390 mm; The curvature radius R4 of the image-side surface of the second lens satisfies: 4.0079 mm ≤ R4 ≤ 4.4567 mm; The curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens satisfy: R2 / 3>R1; The curvature radius R2 of the image-side surface of the first lens and the curvature radius R3 of the object-side surface of the second lens satisfy: R2 / 3>R3; A curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the image-side surface of the second lens satisfy the relationship: R2 / 3>R4.

7. The optical imaging lens assembly according to claim 1, wherein: The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy the following relationship: 2.30≤(R1+R2) / f1+(R3+R4) / f2≤3.

71.

8. The optical imaging lens assembly according to claim 1, wherein: An edge thickness of the seventh lens is greater than a center thickness of the seventh lens on the optical axis, and an edge thickness ET6 of the sixth lens, an edge thickness ET7 of the seventh lens, an effective focal length f6 of the sixth lens, and an effective focal length f7 of the seventh lens satisfy the following relationship: -0.45≤ET7 / f7-ET6 / f6≤-0.

26.

9. The optical imaging lens assembly according to claim 1, wherein: The on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.18≤(SAG41+SAG52)*(N4+N5) / f45≤-0.

13.

10. The optical imaging lens assembly according to claim 1, wherein: The curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: -0.93≤(R7-R8) / f4+(R9-R10) / f5≤-0.

57.

11. The optical imaging lens assembly according to claim 1, wherein: The combined focal length f123 of the first lens, the second lens, and the third lens, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the maximum effective radius DT31 of the object side surface of the third lens satisfy the following: 1.49≤f123 / (DT11+DT21+DT31)≤1.

69.

12. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R12 of the image side surface of the sixth lens, a curvature radius R14 of the image side surface of the seventh lens, and a combined focal length f67 of the sixth lens and the seventh lens satisfy the following relationship: -0.36≤(R12+R14) / f67≤-0.

12.

13. The optical imaging lens assembly according to claim 1, wherein: The center thickness CT6 of the sixth lens on the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, the curvature radius R12 of the image side surface of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy the following: 0.26≤(CT6+T67+CT7) / (R12+R13)≤1.

09.

14. The optical imaging lens assembly according to claim 1, wherein: The combined focal length f56 of the fifth lens and the sixth lens, the maximum effective radius DT52 of the image side surface of the fifth lens, and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy the following: 0.88≤(DT52+DT61) / f56≤1.

16.

15. The optical imaging lens assembly according to claim 1, wherein: The effective focal length f of the optical imaging lens group, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following: 0.62≤f / f1+f / f2+f / f3≤0.

71.

16. The optical imaging lens assembly according to claim 1, wherein: The entrance pupil diameter EPD of the optical imaging lens group, the maximum effective radius DT11 of the object side surface of the first lens, and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy the following: 2.53≤EPD / DT11+EPD / DT72≤2.

86.

17. The optical imaging lens assembly according to claim 1, wherein: The optical imaging lens group further includes a stop, which is located on the object side of the first lens.

Images