Optical imaging lens group

Abstract

The present invention provides an optical imaging lens group. It includes a first lens with a negative optical power; a second lens with a negative optical power; a third lens with a negative optical power; a fourth lens with a positive optical power; a fifth lens with a positive optical power; a sixth lens with a positive optical power; a seventh lens with a negative optical power; an eighth lens with a positive optical power; satisfying: -6 < f1 / f < -4; satisfying: -4.5 < f2 / f < -1.5; the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f * V6 < 160. The present invention solves the problems that the existing optical imaging lens group has difficulties in optimizing off-axis aberration, astigmatism and chromatic aberration.

Description

Technical Field

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

[0002] With the continuous development and improvement of optical imaging lens groups, current optical imaging lens groups have achieved high definition, high resolution and more flexible and diverse designs, and are widely used in entertainment, security, medical treatment, automobile and other fields.

[0003] Taking fisheye lenses as an example, fisheye lenses mainly introduce barrel distortion to compress the edge of the field of view as much as possible, making its field of view angle close to or equal to 180°, so that the actual image contains information within a larger field of view angle range, with a wide viewing angle and distortion effect. However, there are still many problems with fisheye lenses currently on the market. For example, while meeting the requirements of a large field of view angle, it is difficult to optimize the off-axis field of view light trend, and it is impossible to take into account off-axis aberrations and astigmatism, resulting in unclear imaging edges. At the same time, it is difficult to effectively correct chromatic aberration, and it is impossible to guarantee the temperature drift, stability, and friction resistance of the optical imaging lens group under different temperature conditions.

[0004] That is to say, the optical imaging lens group in the prior art has the problem of difficulty in optimizing off-axis aberrations, astigmatism and chromatic aberrations. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical imaging lens assembly to solve the problem of difficulty in optimizing off-axis aberrations, astigmatism and chromatic aberration in the optical imaging lens assembly in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, an optical imaging lens group is provided, which sequentially includes eight lenses with optical power from the object side to the image side: a first lens with negative optical power; a second lens with negative optical power; a third lens with negative optical power; a fourth lens with positive optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with negative optical power; an eighth lens with positive optical power; wherein, at least one of the first lens to the eighth lens is a glass lens, and the central thickness of the sixth lens is the largest; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: -6 < f1 / f < -4; the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens group satisfy: -4.5 < f2 / f < -1.5; the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5; the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens group satisfy: 2.5 < f8 / f < 3.5; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f * V6 < 160.

[0007] Further, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 3 < f34 / f < 35.

[0008] Further, the combined focal length f67 of the sixth lens and the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 15 < f67 / f < 50.

[0009] Further, the radius of curvature R6 of the image side of the third lens and the radius of curvature R7 of the object side of the fourth lens satisfy: 0.8 < R6 / R7 < 1.2.

[0010] Further, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis and the distance T34 on the optical axis from the image side of the third lens to the object side of the fourth lens satisfy: 15 < (CT3 + CT4) / T34 < 65.

[0011] Further, the central thickness CT2 of the second lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1 < CT2 / CT7 < 2.

[0012] Further, the distance T12 on the optical axis from the image side of the first lens to the object side of the second lens and the axial spacing distance SAG12 between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens satisfy: 1 < T12 / SAG12 < 1.3.

[0013] Furthermore, among the on-axis spacings between two adjacent lenses from the first lens to the eighth lens, the on-axis spacing between the first lens and the second lens is the largest; the distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis and the sum ∑AT of the on-axis spacings between every two adjacent lenses from the first lens to the eighth lens satisfy the following relationship: 0.3 <T12 / ∑AT<0.8。

[0014] Furthermore, the on-axis spacing distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, the center thickness CT1 of the first lens on the optical axis, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy the following: -1.8<(SAG11 / CT1) / (R1 / f1)<-0.5.

[0015] Furthermore, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f4 of the fourth lens satisfy the following relationship: -3.5<(f1+f2) / f4<-2.

[0016] Furthermore, the curvature radius R13 of the object side surface of the seventh lens and the curvature radius R15 of the object side surface of the eighth lens satisfy the following relationship: -1 <R13 / R15<-0.5。

[0017] Furthermore, the on-axis distance T45 between the fourth lens and the fifth lens, the on-axis distance T56 between the fifth lens and the sixth lens, the on-axis distance T67 between the sixth lens and the seventh lens, and the on-axis distance T78 between the seventh lens and the eighth lens satisfy the following conditions: 1.3 <T45 / (T56+T67+T78)<2。

[0018] Furthermore, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.1 <f6 / f7<-0.8。

[0019] Furthermore, the on-axis distance Tr1r8 from the object side surface of the first lens to the image side surface of the fourth lens and the on-axis distance Tr9r16 from the object side surface of the fifth lens to the image side surface of the eighth lens satisfy the following conditions: 0.8 <Tr1r8 / Tr9r16<1.6。

[0020] Furthermore, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy the following conditions: <CT6 / CT7+CT8 / CT7<11。

[0021] Furthermore, a curvature radius R13 of the object-side surface of the seventh lens, a curvature radius R14 of the image-side surface of the seventh lens, an Abbe number V7 of the seventh lens, and an effective focal length f7 of the seventh lens satisfy the following relationship: 19<(R13+R14)*V7 / f7<21.

[0022] Furthermore, the effective semi-aperture DT11 of the object-side surface of the first lens and the effective semi-aperture DT12 of the image-side surface of the first lens satisfy the following relationship: 0.8<(DT11-DT12) / DT12<3.

[0023] Furthermore, the effective semi-aperture from the first lens to the fourth lens gradually decreases, and the effective semi-aperture from the fifth lens to the eighth lens gradually increases.

[0024] Furthermore, the effective semi-aperture DT11 of the object-side surface of the first lens, the effective semi-aperture DT42 of the image-side surface of the fourth lens, the effective semi-aperture DT82 of the image-side surface of the eighth lens, and the effective semi-aperture DT51 of the object-side surface of the fifth lens satisfy the following relationship: 2.5<(DT11-DT42) / (DT82-DT51)<5.

[0025] Furthermore, the on-axis spacing 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 effective focal length f5 of the fifth lens, the on-axis spacing distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy the following relationship: -0.3 <SAG52 / f5-SAG61 / f6<-0.15。

[0026] Furthermore, the on-axis spacing distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens and the center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 1.5 <SAG71 / CT7<2.5。

[0027] Furthermore, the maximum field of view FOV of the optical imaging lens group, the effective half-aperture DT11 of the object side of the first lens, and the on-axis distance TD from the object side of the first lens to the image side of the eighth lens satisfy the following conditions: 0.4 <tan(FOV / 4)*DT11 / TD<0.7。

[0028] Furthermore, the maximum field angle FOV of the optical imaging lens group, the aperture number Fno of the optical imaging lens group and the effective focal length f of the optical imaging lens group satisfy the following relationship: <tan(FOV / 3) / (Fno*f)<1.8。

[0029] According to another aspect of the present invention, an optical imaging lens group is provided, which sequentially includes a first lens group and a second lens group from the object side to the image side. The first lens group includes a first lens, a second lens, a third lens, and a fourth lens. The first lens group includes at least one glass lens, and the effective radius of the object side surface of the first lens in the first lens group is the largest; the second lens group includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The second lens group includes at least one glass lens, and the effective radius of the image side surface of the eighth lens in the second lens group is the largest; the maximum field angle FOV of the optical imaging lens group, the aperture number Fno of the optical imaging lens group, and the effective focal length f of the optical imaging lens group satisfy: 1 < tan(FOV / 3) / (Fno*f) < 1.8; the on-axis distance Tr1r8 from the object side surface of the first lens to the image side surface of the fourth lens and the on-axis distance Tr9r16 from the object side surface of the fifth lens to the image side surface of the eighth lens satisfy: 0.8 < Tr1r8 / Tr9r16 < 1.6; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group, and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f*V6 < 160; the combined focal length f67 of the sixth lens and the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 15 < f67 / f < 50.

[0030] Further, the first lens group includes at least three negative power lenses, and the second lens group includes at least three positive power lenses.

[0031] Further, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: -6 < f1 / f < -4.

[0032] Further, the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens group satisfy: -4.5 < f2 / f < -1.5.

[0033] Further, the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5.

[0034] Further, the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens group satisfy: 2.5 < f8 / f < 3.5.

[0035] Further, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 3 < f34 / f < 35.

[0036] Further, the curvature radius R6 of the image side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: 0.8 < R6 / R7 < 1.2.

[0037] Furthermore, 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 distance T34 from the image-side surface of the third lens to the object-side surface of the fourth lens on the optical axis satisfy the following relationship: 15<(CT3+CT4) / T34<65.

[0038] Furthermore, the center thickness CT2 of the second lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy: 1 <CT2 / CT7<2。

[0039] Furthermore, the distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis and the on-axis spacing distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the effective radius vertex of the image side surface of the first lens satisfy the following: 1 <T12 / SAG12<1.3。

[0040] Furthermore, among the on-axis spacings between two adjacent lenses from the first lens to the eighth lens, the on-axis spacing between the first lens and the second lens is the largest; the distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis and the sum ∑AT of the on-axis spacings between every two adjacent lenses from the first lens to the eighth lens satisfy the following relationship: 0.3 <T12 / ∑AT<0.8。

[0041] Furthermore, the on-axis spacing distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, the center thickness CT1 of the first lens on the optical axis, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy the following: -1.8<(SAG11 / CT1) / (R1 / f1)<-0.5.

[0042] Furthermore, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f4 of the fourth lens satisfy the following relationship: -3.5<(f1+f2) / f4<-2.

[0043] Furthermore, the curvature radius R13 of the object side surface of the seventh lens and the curvature radius R15 of the object side surface of the eighth lens satisfy the following relationship: -1 <R13 / R15<-0.5。

[0044] Furthermore, the on-axis distance T45 between the fourth lens and the fifth lens, the on-axis distance T56 between the fifth lens and the sixth lens, the on-axis distance T67 between the sixth lens and the seventh lens, and the on-axis distance T78 between the seventh lens and the eighth lens satisfy the following conditions: 1.3 <T45 / (T56+T67+T78)<2。

[0045] Furthermore, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.1 <f6 / f7<-0.8。

[0046] Furthermore, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy the following conditions: <CT6 / CT7+CT8 / CT7<11。

[0047] Furthermore, a curvature radius R13 of the object-side surface of the seventh lens, a curvature radius R14 of the image-side surface of the seventh lens, an Abbe number V7 of the seventh lens, and an effective focal length f7 of the seventh lens satisfy the following relationship: 19<(R13+R14)*V7 / f7<21.

[0048] Furthermore, the effective semi-aperture DT11 of the object-side surface of the first lens and the effective semi-aperture DT12 of the image-side surface of the first lens satisfy the following relationship: 0.8<(DT11-DT12) / DT12<3.

[0049] Furthermore, the effective semi-aperture from the first lens to the fourth lens gradually decreases, and the effective semi-aperture from the fifth lens to the eighth lens gradually increases.

[0050] Furthermore, the effective semi-aperture DT11 of the object-side surface of the first lens, the effective semi-aperture DT42 of the image-side surface of the fourth lens, the effective semi-aperture DT82 of the image-side surface of the eighth lens, and the effective semi-aperture DT51 of the object-side surface of the fifth lens satisfy the following relationship: 2.5<(DT11-DT42) / (DT82-DT51)<5.

[0051] Furthermore, the on-axis spacing 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 effective focal length f5 of the fifth lens, the on-axis spacing distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy the following relationship: -0.3 <SAG52 / f5-SAG61 / f6<-0.15。

[0052] Furthermore, the on-axis spacing distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens and the center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 1.5 <SAG71 / CT7<2.5。

[0053] Furthermore, the maximum field of view FOV of the optical imaging lens group, the effective half-aperture DT11 of the object side of the first lens, and the on-axis distance TD from the object side of the first lens to the image side of the eighth lens satisfy the following conditions: 0.4 <tan(FOV / 4)*DT11 / TD<0.7。

[0054] Applying the technical solution of the present invention, the optical imaging lens group sequentially includes eight lenses with optical power from the object side to the image side: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an eighth lens with positive optical power; wherein, at least one of the first lens to the eighth lens is a glass lens, and the central thickness of the sixth lens is the largest; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: -6 < f1 / f < -4; the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens group satisfy: -4.5 < f2 / f < -1.5; the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5; the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens group satisfy: 2.5 < f8 / f < 3.5; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group, and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f * V6 < 160.

[0055] By reasonably constraining the optical power of the first lens to the eighth lens, the deflection ability of each lens to light can be reasonably allocated, the light path can be adjusted, and various aberrations of the system can be effectively balanced and corrected. Among them, by constraining the optical power of the first lens to the third lens to be negative, it is beneficial to control the deflection of the large-field-of-view light at the edge; by constraining the optical power of the fifth lens and the sixth lens to be positive, the spherical aberration and distortion of the system can be effectively corrected; in addition, at least one of the first lens to the eighth lens is a glass lens. When the first lens is a glass lens, it helps to improve the stability and friction resistance of the optical imaging lens group. When the glass lens is in the middle, it is mainly to correct the temperature drift of the system and ensure the performance stability of the system under different temperature environments; the central thickness of the sixth lens is the largest, mainly to ensure the processing and assembly of the lens. By controlling -6 < f1 / f < -4, -4.5 < f2 / f < -1.5, 2 < f4 / f < 3.5, 2.5 < f8 / f < 3.5, and 120 < CT6 / f * V6 < 160, it is beneficial to control the off-axis field light, ensure the ultra-wide-angle characteristics of the system, effectively correct the off-axis aberration and astigmatism of the system, correct the chromatic aberration of the system, and achieve small chromatic aberration; at the same time, control the bending of the last lens to ensure the matching of the system CRA and the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0057] Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Example 1 of the present invention is shown;

[0058] Figure 2 and Figure 3 Shown respectively Figure 1 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group;

[0059] Figure 4 A schematic structural diagram of an optical imaging lens assembly according to Example 2 of the present invention is shown;

[0060] Figure 5 and Figure 6 Shown respectively Figure 4 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group;

[0061] Figure 7 A schematic structural diagram of an optical imaging lens assembly according to Example 3 of the present invention is shown;

[0062] Figure 8 and Figure 9 Shown respectively Figure 7 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group;

[0063] Figure 10 Schematic diagram of the structure of the optical imaging lens assembly of Example 4 of the present invention is shown;

[0064] Figure 11 and Figure 12 Shown respectively Figure 10 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group;

[0065] Figure 13 A schematic structural diagram of an optical imaging lens assembly according to Example 5 of the present invention is shown;

[0066] Figure 14 and Figure 15 Shown respectively Figure 13 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group;

[0067] Figure 16 Schematic diagram of the structure of the optical imaging lens assembly of Example 6 of the present invention is shown;

[0068] Figure 17 and Figure 18 Shown respectively Figure 16 The axial chromatic aberration curve and astigmatism curve of the optical imaging lens group.

[0069] The above drawings include the following reference numerals:

[0070] 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; STO, aperture stop; E5, fifth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; E6, sixth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens; E7, seventh lens; S13, object-side surface of the seventh lens; S14, image-side surface of the seventh lens; E8, eighth lens; S15, object-side surface of the eighth lens; S16, image-side surface of the eighth lens. DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] In this text, the paraxial region refers to the region 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 region; 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 region. The surface of each lens closer to the object side is the object side surface of the lens, and the surface of each lens closer to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive and negative values of the R value (the R value refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). For the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0077] To solve the problems of off-axis aberration, astigmatism, and difficulty in optimizing chromatic aberration existing in the optical imaging lens group in the prior art, the present invention provides an optical imaging lens group.

[0078] Embodiment 1

[0079] As Figures 1 to 18 shown, the optical imaging lens group sequentially includes eight lenses with optical power from the object side to the image side: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, and an eighth lens with positive optical power; among them, at least one of the first lens to the eighth lens is a glass lens, and the center thickness of the sixth lens is the largest; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: -6 < f1 / f < -4; the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens group satisfy: -4.5 < f2 / f < -1.5; the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5; the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens group satisfy: 2.5 < f8 / f < 3.5; the center thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group, and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f * V6 < 160.

[0080] By reasonably constraining the optical powers of the first lens to the eighth lens, the deflection ability of each lens to light can be reasonably distributed, the light path can be adjusted, and various aberrations of the system can be effectively balanced and corrected. Among them, by constraining the optical powers of the first lens to the third lens to be negative, it is beneficial to control the deflection of light in the large marginal field of view; by constraining the optical powers of the fifth lens and the sixth lens to be positive, the spherical aberration and distortion of the system can be effectively corrected; in addition, at least one glass lens is included among the first lens to the eighth lens. When the first lens is a glass lens, it helps to improve the stability and friction resistance of the optical imaging lens group. When the glass lens is in the middle, it is mainly to correct the temperature drift of the system and ensure the performance stability of the system under different temperature environments; the central thickness of the sixth lens is the largest, mainly to ensure the processing and assembly of the lens. By controlling -6 < f1 / f < -4, -4.5 < f2 / f < -1.5, 2 < f4 / f < 3.5, 2.5 < f8 / f < 3.5, and 120 < CT6 / f * V6 < 160, it is beneficial to control the light in the outer field of view, ensure the characteristics of the ultra-wide angle of the system, effectively correct the off-axis aberration and astigmatism of the system, correct the chromatic aberration of the system, and achieve small chromatic aberration; at the same time, control the bending of the last lens to ensure the matching of the system CRA with the chip. Preferably, -5.26 ≤ f1 / f ≤ -4.50.

[0081] Preferably, -4.26 ≤ f2 / f ≤ -1.97.

[0082] Preferably, 2.62 ≤ f4 / f ≤ 3.36.

[0083] Preferably, 2.57 ≤ f8 / f ≤ 3.30.

[0084] Preferably, 125.72 ≤ CT6 / f * V6 ≤ 154.39.

[0085] In this embodiment, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 3 < f34 / f < 35. By constraining the ratio of the combined focal length of the third lens and the fourth lens to the effective focal length of the optical imaging lens group to be between 3 and 35, the optical powers borne by the third lens and the fourth lens can be effectively controlled, and a large field of view angle of the system can be ensured. Preferably, 3.58 ≤ f34 / f ≤ 11.30.

[0086] In this embodiment, the combined focal length f67 of the sixth lens and the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 15 < f67 / f < 50. By controlling the ratio of the combined focal length of the sixth lens and the seventh lens to the effective focal length of the optical imaging lens group to be between 15 and 50, the ghost image and chromatic aberration of the system can be effectively corrected. Preferably, 16.01 ≤ f67 / f ≤ 43.87.

[0087] In this embodiment, the curvature radius R6 of the image side of the third lens and the curvature radius R7 of the object side of the fourth lens satisfy: 0.8 < R6 / R7 < 1.2. By controlling the ratio of the curvature radii of the image side of the third lens and the object side of the fourth lens to be between 0.8 and 1.2, on the one hand, the assembly of the lenses can be ensured, and on the other hand, the intensity of ghost images generated between the two lenses can be effectively reduced. Preferably, 0.90 ≤ R6 / R7 ≤ 1.13.

[0088] In this embodiment, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the distance T34 on the optical axis from the image side of the third lens to the object side of the fourth lens satisfy: 15 < (CT3 + CT4) / T34 < 65. Satisfying this conditional formula can control the reasonable arrangement of the third lens and the fourth lens in the structural space, which is conducive to the assembly of each lens. Preferably, 37.76 ≤ (CT3 + CT4) / T34 ≤ 61.58.

[0089] In this embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1 < CT2 / CT7 < 2. Satisfying this conditional formula can, on the one hand, effectively correct the spherical aberration of the system, and on the other hand, reduce the overall optical length of the system. Preferably, 1.02 ≤ CT2 / CT7 ≤ 1.91.

[0090] In this embodiment, the distance T12 on the optical axis from the image side of the first lens to the object side of the second lens and the axial interval distance SAG12 between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens satisfy: 1 < T12 / SAG12 < 1.3. Satisfying this conditional formula is conducive to restricting the edge air gap between the first lens and the second lens, conducive to improving the relative illumination, and ensuring the structural arrangement between the lenses. Preferably, 1.07 ≤ T12 / SAG12 ≤ 1.11.

[0091] In this embodiment, among the axial spacings between two adjacent lenses from the first lens to the eighth lens, the axial spacing between the first lens and the second lens is the largest; the distance T12 on the optical axis from the image side of the first lens to the object side of the second lens and the sum ∑AT of the axial spacings of every two adjacent lenses from the first lens to the eighth lens satisfy: 0.3 < T12 / ∑AT < 0.8. Such a setting is conducive to controlling the overall optical length on the one hand, and on the other hand, is conducive to the first lens deflecting the light rays of a large field of view, making the system have a larger field of view angle. Preferably, 0.59 ≤ T12 / ∑AT ≤ 0.60.

[0092] In this embodiment, the axial spacing distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, the central thickness CT1 of the first lens on the optical axis, the radius of curvature R1 of the object side surface of the first lens, and the effective focal length f1 of the first lens satisfy: -1.8 < (SAG11 / CT1) / (R1 / f1) < -0.5. Satisfying this conditional expression can ensure the machinability of the first lens while enabling the first lens to have a large light deflection ability. Preferably, -0.67 ≤ (SAG11 / CT1) / (R1 / f1) ≤ -0.51.

[0093] In this embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f4 of the fourth lens satisfy: -3.5 < (f1 + f2) / f4 < -2. Satisfying this conditional expression can effectively balance the axial aberration and off-axis aberration of the system and improve the imaging quality. Preferably, -3.30 ≤ (f1 + f2) / f4 ≤ -2.38.

[0094] In this embodiment, the radius of curvature R13 of the object side surface of the seventh lens and the radius of curvature R15 of the object side surface of the eighth lens satisfy: -1 < R13 / R15 < -0.5. Satisfying this conditional expression can effectively control the ghost image generated between the seventh lens and the eighth lens, making the convergence position of the ghost image outside the effective image plane and ensuring a low ghost image. Preferably, - (0.89) ≤ R13 / R15 ≤ -0.84.

[0095] In this embodiment, the axial spacing T45 from the fourth lens to the fifth lens, the axial spacing T56 from the fifth lens to the sixth lens, the axial spacing T67 from the sixth lens to the seventh lens, and the axial spacing T78 from the seventh lens to the eighth lens satisfy: 1.3 < T45 / (T56 + T67 + T78) < 2. Satisfying this conditional expression is beneficial to the structural arrangement between the lenses and reduces the total optical length of the system. Preferably, 1.36 ≤ T45 / (T56 + T67 + T78) ≤ 1.83.

[0096] In this embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.1 < f6 / f7 < -0.8. Satisfying this conditional expression can effectively correct the coma and distortion of the system. Preferably, -1.03 ≤ f6 / f7 ≤ -0.97.

[0097] In this embodiment, the on-axis distance Tr1r8 from the object side surface of the first lens to the image side surface of the fourth lens and the on-axis distance Tr9r16 from the object side surface of the fifth lens to the image side surface of the eighth lens satisfy: 0.8 < Tr1r8 / Tr9r16 < 1.6. Meeting this conditional formula is conducive to the structural arrangement of the optical imaging lens group, making the system have high stability. Preferably, 0.88 ≤ Tr1r8 / Tr9r16 ≤ 1.49.

[0098] In this embodiment, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy: 7 < CT6 / CT7 + CT8 / CT7 < 11. By controlling this conditional formula, it is conducive to the optical imaging lens group having a large image plane and high relative illumination. Preferably, 7.67 ≤ CT6 / CT7 + CT8 / CT7 ≤ 10.10.

[0099] In this embodiment, the radius of curvature R13 of the object side surface of the seventh lens, the radius of curvature R14 of the image side surface of the seventh lens, the Abbe number V7 of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: 19 < (R13 + R14) * V7 / f7 < 21. By controlling this conditional formula, on the one hand, it is conducive to correcting the chromatic aberration of the system, and on the other hand, it ensures the injection molding of the lens. Preferably, 19.03 ≤ (R13 + R14) * V7 / f7 ≤ 20.85.

[0100] In this embodiment, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT12 of the image side surface of the first lens satisfy: 0.8 < (DT11 - DT12) / DT12 < 3. Meeting this conditional formula is conducive to ensuring the machinability of the first lens and the assembly of the subsequent optical imaging lens group. Preferably, 0.89 ≤ (DT11 - DT12) / DT12 ≤ 2.30.

[0101] In this embodiment, the effective semi-aperture gradually decreases from the first lens to the fourth lens, and gradually increases from the fifth lens to the eighth lens. Such a setting is conducive to ensuring the system has the characteristics of a large field angle on the one hand, and on the other hand, making the system have a large image plane.

[0102] In this embodiment, the following relationship is satisfied among the effective semi-aperture DT11 of the object side surface of the first lens, the effective semi-aperture DT42 of the image side surface of the fourth lens, the effective semi-aperture DT82 of the image side surface of the eighth lens, and the effective semi-aperture DT51 of the object side surface of the fifth lens: 2.5 < (DT11 - DT42) / (DT82 - DT51) < 5. Meeting this conditional formula enables the system to have a large image plane while ensuring a large field angle of the system. Preferably, 2.56 ≤ (DT11 - DT42) / (DT82 - DT51) ≤ 4.70.

[0103] In this embodiment, the following relationship is satisfied among the axial spacing 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 effective focal length f5 of the fifth lens, the axial spacing distance SAG61 between the intersection point of the object side surface of the sixth lens and the optical axis and the vertex of the effective radius of the object side surface of the sixth lens, and the effective focal length f6 of the sixth lens: -0.3 < SAG52 / f5 - SAG61 / f6 < -0.15. By controlling this conditional formula, it is beneficial to correct the astigmatism and distortion of the system and enable the system to have high imaging quality. Preferably, -0.26 ≤ SAG52 / f5 - SAG61 / f6 ≤ -0.19.

[0104] In this embodiment, the following relationship is satisfied between the axial spacing distance SAG71 between the intersection point of the object side surface of the seventh lens and the optical axis and the vertex of the effective radius of the object side surface of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis: 1.5 < SAG71 / CT7 < 2.5. By controlling this conditional formula, on the one hand, it is beneficial to the injection molding of the seventh lens and improves the processing yield of the lens; on the other hand, it can effectively reduce the ghost image intensity generated between the sixth lens and the seventh lens. Preferably, 1.78 ≤ SAG71 / CT7 ≤ 2.20.

[0105] In this embodiment, the following relationship is satisfied among the maximum field angle FOV of the optical imaging lens group, the effective semi-aperture DT11 of the object side surface of the first lens, and the axial spacing TD from the object side surface of the first lens to the image side surface of the eighth lens: 0.4 < tan(FOV / 4) * DT11 / TD < 0.7. By controlling this conditional formula, while ensuring a large field angle of the system, the optical size of the system can be compressed as much as possible. Preferably, 0.47 ≤ tan(FOV / 4) * DT11 / TD ≤ 0.61. [[ID=IO]]

[0106] In this embodiment, the maximum field of view FOV of the optical imaging lens group, the f-number Fno of the optical imaging lens group, and the effective focal length f of the optical imaging lens group satisfy: 1 < tan(FOV / 3) / (Fno * f) < 1.8. By controlling this conditional expression, on the one hand, it can ensure that the system has a relatively large field of view, and on the other hand, it helps to improve the ability of the optical imaging lens group to receive the energy of the light source, obtain as much object-side information as possible, and improve the imaging brightness and resolution. Preferably, 1.32 ≤ tan(FOV / 3) / (Fno * f) ≤ 1.76.

[0107] Embodiment 2

[0108] As Figures 1 to 18 shown, the optical imaging lens group sequentially includes a first lens group and a second lens group from the object side to the image side. The first lens group includes a first lens, a second lens, a third lens, and a fourth lens. The first lens group includes at least one glass lens, and the effective radius of the object side surface of the first lens in the first lens group is the largest. The second lens group includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The second lens group includes at least one glass lens, and the effective radius of the image side surface of the eighth lens in the second lens group is the largest. The maximum field of view FOV of the optical imaging lens group, the f-number Fno of the optical imaging lens group, and the effective focal length f of the optical imaging lens group satisfy: 1 < tan(FOV / 3) / (Fno * f) < 1.8; the on-axis distance Tr1r8 from the object side surface of the first lens to the image side surface of the fourth lens and the on-axis distance Tr9r16 from the object side surface of the fifth lens to the image side surface of the eighth lens satisfy: 0.8 < Tr1r8 / Tr9r16 < 1.6; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group, and the Abbe number V6 of the sixth lens satisfy: 120 < CT6 / f * V6 < 160; the combined focal length f67 of the sixth lens and the seventh lens and the effective focal length f of the optical imaging lens group satisfy: 15 < f67 / f < 50.

[0109] By controlling the optical power and effective radius of each lens in the first lens group and the second lens group, on the one hand, the axial aberration and off-axis aberration of the system can be effectively balanced, enabling the system to have high imaging quality. On the other hand, it can ensure that the system has a large field of view angle and image plane. Among them, the glass lenses in the first lens group mainly enhance the stability and friction resistance of the optical imaging lens group; the glass lenses in the second lens group mainly correct the temperature drift of the system and ensure the performance stability of the system under different temperature environments. By controlling 1 < tan(FOV / 3) / (Fno*f) < 1.8, 0.8 < Tr1r8 / Tr9r16 < 1.6, 120 < CT6 / f*V6 < 160, and 15 < f67 / f < 50, on the one hand, it can ensure that the system has a large field of view angle and achieve an ultra-wide angle. On the other hand, it helps to improve the ability of the optical imaging lens group to receive the energy of the light source, obtain as much object space information as possible, improve the imaging brightness and resolution; at the same time, it is beneficial to the structural arrangement of the optical imaging lens group, making the system have high stability; it can also effectively correct the chromatic aberration of the system and achieve small chromatic aberration. Further, it can effectively correct the ghost image and chromatic aberration of the system. The optical imaging lens group of the present invention consists of eight lenses. By reasonably restricting the optical power of each lens and combining multiple conditional expressions, the optical imaging lens group of the present invention has the advantages of large aperture, ultra-wide angle, high relative illumination, small chromatic aberration, and small astigmatism.

[0110] Preferably, 1.32 ≤ tan(FOV / 3) / (Fno*f) ≤ 1.76.

[0111] Preferably, 0.88 ≤ Tr1r8 / Tr9r16 ≤ 1.49.

[0112] Preferably, 125.72 ≤ CT6 / f*V6 ≤ 154.39. [[ID=X]]

[0113] Preferably, 16.01 ≤ f67 / f ≤ 43.87.

[0114] In this embodiment, the first lens group includes at least three negative-power lenses. The three negative-power lenses are beneficial to controlling the deflection of the marginal large-field light rays; the second lens group includes at least three positive-power lenses. The three positive-power lenses are beneficial to correcting the field curvature, distortion, and chromatic aberration of the system.

[0115] In this embodiment, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens group satisfy: -6 < f1 / f < -4. By controlling this conditional expression, the off-field light rays can be effectively controlled, ensuring the ultra-wide angle characteristic of the system. Preferably, -5.26 ≤ f1 / f ≤ -4.50.

[0116] In this embodiment, the effective focal length f2 of the second lens and the effective focal length f of the optical imaging lens group satisfy: -4.5 < f2 / f < -1.5. By controlling this conditional expression, the off-axis field light can be effectively controlled, ensuring the ultra-wide-angle feature of the system. Preferably, -4.26 ≤ f2 / f ≤ -1.97.

[0117] In this embodiment, the effective focal length f4 of the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 2 < f4 / f < 3.5. By controlling this conditional expression, the off-axis aberration and astigmatism of the system can be effectively corrected. Preferably, 2.62 ≤ f4 / f ≤ 3.36.

[0118] In this embodiment, the effective focal length f8 of the eighth lens and the effective focal length f of the optical imaging lens group satisfy: 2.5 < f8 / f < 3.5. By controlling this conditional expression, the bending of the last lens can be controlled, ensuring the matching of the system CRA with the chip. Preferably, 2.57 ≤ f8 / f ≤ 3.30.

[0119] In this embodiment, the combined focal length f34 of the third lens and the fourth lens and the effective focal length f of the optical imaging lens group satisfy: 3 < f34 / f < 35. By controlling this conditional expression, the optical power borne by the third lens and the fourth lens can be effectively controlled, and the system can be ensured to have a large field angle; preferably, 3.58 ≤ f34 / f ≤ 11.30.

[0120] In this embodiment, the curvature radius R6 of the image side of the third lens and the curvature radius R7 of the object side of the fourth lens satisfy: 0.8 < R6 / R7 < 1.2. By controlling the ratio of the curvature radius of the image side of the third lens to the curvature radius of the object side of the fourth lens to be between 0.8 and 1.2, on the one hand, the assembly of the lens can be ensured, and on the other hand, the ghost image intensity generated between the two lenses can be effectively reduced. Preferably, 0.90 ≤ R6 / R7 ≤ 1.13.

[0121] In this embodiment, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the distance T34 on the optical axis from the image side of the third lens to the object side of the fourth lens satisfy: 15 < (CT3 + CT4) / T34 < 65. Satisfying this conditional expression can control the reasonable arrangement of the third lens and the fourth lens in the structural space, which is beneficial to the assembly of each lens. Preferably, 37.76 ≤ (CT3 + CT4) / T34 ≤ 61.58. [[ID=十六]] [[ID=十七]]

[0122] In this embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1 < CT2 / CT7 < 2. Satisfying this conditional expression can, on the one hand, effectively correct the spherical aberration of the system, and on the other hand, reduce the overall optical length of the system. Preferably, 1.02 ≤ CT2 / CT7 ≤ 1.91.

[0123] In this embodiment, the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens and the axial spacing distance SAG12 between the intersection of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens satisfy: 1 < T12 / SAG12 < 1.3. Satisfying this conditional expression is beneficial to restricting the marginal air gap between the first lens and the second lens, beneficial to improving the relative illumination, and ensuring the structural arrangement between the lenses. Preferably, 1.07 ≤ T12 / SAG12 ≤ 1.11.

[0124] In this embodiment, among the axial spacings between two adjacent lenses from the first lens to the eighth lens, the axial spacing between the first lens and the second lens is the largest; the distance T12 on the optical axis from the image side surface of the first lens to the object side surface of the second lens and the sum ∑AT of the axial spacings between every two adjacent lenses from the first lens to the eighth lens satisfy: 0.3 < T12 / ∑AT < 0.8. Such a setting is beneficial to controlling the overall optical length on the one hand, and on the other hand, beneficial to the deflection of large-field light by the first lens, enabling the system to have a larger field angle. Preferably, 0.59 ≤ T12 / ∑AT ≤ 0.60.

[0125] In this embodiment, the axial spacing distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, the central thickness CT1 of the first lens on the optical axis, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy: -1.8 < (SAG11 / CT1) / (R1 / f1) < -0.5. Satisfying this conditional expression can ensure the machinability of the first lens while enabling the first lens to have a large light deflection ability. Preferably, -0.67 ≤ (SAG11 / CT1) / (R1 / f1) ≤ -0.51.

[0126] In this embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy: -3.5 < (f1 + f2) / f4 < -2. Satisfying this conditional expression can effectively balance the axial aberration and off-axis aberration of the system and improve the imaging quality. Preferably, -3.30 ≤ (f1 + f < / f4 ≤ -2.38.

[0127] In this embodiment, the curvature radius R13 of the object side surface of the seventh lens and the curvature radius R15 of the object side surface of the eighth lens satisfy: -1 < R13 / R15 < -0.5. By satisfying this conditional expression, the ghost images generated between the seventh lens and the eighth lens can be effectively controlled, making the convergence position of the ghost images outside the effective image plane, ensuring low ghost images. Preferably, -0.89 ≤ R13 / R15 ≤ -0.84.

[0128] In this embodiment, the on-axis distance T45 between the fourth lens and the fifth lens, the on-axis distance T56 between the fifth lens and the sixth lens, the on-axis distance T67 between the sixth lens and the seventh lens, and the on-axis distance T78 between the seventh lens and the eighth lens satisfy: 1.3 < T45 / (T56 + T67 + T78) < 2. By satisfying this conditional expression, it is beneficial to the structural arrangement between the lenses and reduces the overall optical length of the system. Preferably, 1.36 ≤ T45 / (T56 + T67 + T78) ≤ 1.83.

[0129] In this embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: -1.1 < f6 / f7 < -0.8. By satisfying this conditional expression, the coma and distortion of the system can be effectively corrected. Preferably, -1.03 ≤ f6 / f7 ≤ -0.97.

[0130] In this embodiment, the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, and the central thickness CT8 of the eighth lens on the optical axis satisfy: 7 < CT6 / CT7 + CT8 / CT7 < 11. By controlling this conditional expression, it is beneficial for the optical imaging lens group to have a larger image plane and high relative illumination. Preferably, 7.67 ≤ CT6 / CT7 + CT8 / CT7 ≤ 10.10.

[0131] In this embodiment, the curvature radius R13 of the object side surface of the seventh lens, the curvature radius R14 of the image side surface of the seventh lens, the Abbe number V7 of the seventh lens, and the effective focal length f7 of the seventh lens satisfy: 19 < (R13 + R14)*V7 / f7 < 21. By controlling this conditional expression, on the one hand, it is beneficial to correct the chromatic aberration of the system, and on the other hand, it ensures the injection molding of the lens. Preferably, 19.03 ≤ (R13 + R14)*V7 / f7 ≤ 20.85.

[0132] In this embodiment, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT12 of the image side surface of the first lens satisfy: 0.8 < (DT11 - DT12) / DT12 < 3. By satisfying this conditional expression, it is beneficial to ensure the machinability of the first lens and the assembly of the later optical imaging lens group. Preferably, 0.89 ≤ (DT11 - DT12) / DT12 ≤ 2.30.

[0133] In this embodiment, the effective semi-aperture of the first lens to the fourth lens gradually decreases, and the effective semi-aperture of the fifth lens to the eighth lens gradually increases. Such a setting is beneficial to ensuring that the system has the characteristic of a large field angle on the one hand, and on the other hand, enables the system to have a relatively large image plane.

[0134] In this embodiment, the following relationship is satisfied among the effective semi-aperture DT11 of the object side of the first lens, the effective semi-aperture DT42 of the image side of the fourth lens, the effective semi-aperture DT82 of the image side of the eighth lens, and the effective semi-aperture DT51 of the object side of the fifth lens: 2.5 < (DT11 - DT42) / (DT82 - DT51) < 5. Meeting this conditional formula enables the system to have a relatively large image plane while ensuring a large field angle of the system. Preferably, 2.560 ≤ (DT11 - DT42) / (DT82 - DT51) ≤ 4.70.

[0135] In this embodiment, the following relationship is satisfied among the axial spacing distance SAG52 between the intersection point of the image side of the fifth lens and the optical axis and the vertex of the effective radius of the image side of the fifth lens, the effective focal length f5 of the fifth lens, the axial spacing distance SAG61 between the intersection point of the object side of the sixth lens and the optical axis and the vertex of the effective radius of the object side of the sixth lens, and the effective focal length f6 of the sixth lens: -0.3 < SAG52 / f5 - SAG61 / f6 < -0.15. By controlling this conditional formula, it is beneficial to correcting the astigmatism and distortion of the system, enabling the system to have a high imaging quality. Preferably, -0.26 ≤ SAG52 / f5 - SAG61 / f6 ≤ -0.19.

[0136] In this embodiment, the following relationship is satisfied between the axial spacing distance SAG71 between the intersection point of the object side of the seventh lens and the optical axis and the vertex of the effective radius of the object side of the seventh lens and the central thickness CT7 of the seventh lens on the optical axis: 1.5 < SAG71 / CT7 < 2.5. By controlling this conditional formula, on the one hand, it is beneficial to the injection molding of the seventh lens, improving the processing yield of the lens; on the other hand, it can effectively weaken the ghost image intensity generated between the sixth lens and the seventh lens. Preferably, 1.78 ≤ SAG71 / CT7 ≤ 2.20.

[0137] In this embodiment, the following relationship is satisfied among the maximum field angle FOV of the optical imaging lens group, the effective semi-aperture DT11 of the object side of the first lens, and the axial spacing TD from the object side of the first lens to the image side of the eighth lens: 0.4 < tan(FOV / 4) * DT11 / TD < 0.7. By controlling this conditional formula, while ensuring a large field angle of the system, the optical size of the system can be compressed as much as possible. Preferably, 0.47 ≤ tan(FOV / 4) * DT11 / TD ≤ 0.61.

[0138] Optionally, the optical imaging lens assembly may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0139] The optical imaging lens assembly in this application can utilize multiple lenses, such as the eight lenses described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and the on-axis distance between lenses, 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 convenient for production and processing and suitable for portable electronic devices such as smartphones.

[0140] 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.

[0141] 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.

[0142] 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 eight lenses are described in the embodiments, the optical imaging lens assembly is not limited to eight lenses. If desired, the optical imaging lens assembly can also include other numbers of lenses.

[0143] 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.

[0144] It should be noted that any one of the following examples 1 to 6 is applicable to all embodiments of the present application.

[0145] Example 1

[0146] like Figures 1 to 3 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.

[0147] like Figure 1 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

[0148] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex. The eighth lens element E8 has positive refractive power. The object-side surface S15 of the eighth lens element is convex, and the image-side surface S16 of the eighth lens element is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface.

[0149] In this example, the effective focal length f of the optical imaging lens group is 1.25 mm, the maximum field of view FOV of the optical imaging lens group is 212°, and the aperture value Fno of the optical imaging lens group is 1.30.

[0150] Table 1 shows the basic structural parameters of the optical imaging lens assembly of Example 1, where the units of curvature radius and thickness / distance are all in millimeters (mm). The first lens element E1 and the sixth lens element E6 are both made of glass. The surfaces of glass lenses can be either spherical or aspherical. In other words, the object-side surface S1 of the first lens element, the image-side surface S2 of the first lens element, the object-side surface S11 of the sixth lens element, and the image-side surface S12 of the sixth lens element can be either spherical or aspherical, and can be set according to actual conditions.

[0151]

[0152]

[0153] Table 1

[0154] In Example 1, the object-side surface and the image-side surface of any lens from the second lens E2 to the eighth lens E8 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0155]

[0156] 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 i-th order correction coefficient 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 S3-S16 in Example 1.

[0157] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.4947E-01 -9.3081E-02 5.0017E-02 -2.0023E-02 4.3186E-03 5.7571E-04 -8.3890E-04 S4 9.9011E-04 2.2234E-01 -6.9550E-01 1.6649E+00 -2.8693E+00 3.4952E+00 -3.0428E+00 S5 -1.9714E-01 3.8747E-01 -7.1278E-01 1.6725E+00 -3.3032E+00 4.6335E+00 -4.5618E+00 S6 -3.7733E-01 6.1071E-01 9.3588E-01 -5.7833E+00 1.2120E+01 -1.4525E+01 9.9878E+00 S7 -2.2216E-01 4.0320E-01 3.6409E-01 -2.1752E+00 1.7053E+00 5.7634E+00 -1.8470E+01 S8 4.3300E-02 4.5639E-01 -4.8734E+00 3.3604E+01 -1.5571E+02 5.0324E+02 -1.1589E+03 S9 -1.3307E-03 -3.9047E-02 5.2106E-01 -4.1062E+00 2.0368E+01 -6.6626E+01 1.4933E+02 S10 -5.7918E-02 1.1629E-01 -2.4721E-01 4.3443E-01 -6.0069E-01 6.4052E-01 -5.3119E-01 S11 -6.7559E-02 1.3213E-01 -2.2518E-01 3.0605E-01 -3.1363E-01 2.3886E-01 -1.3501E-01 S12 -2.3305E-01 5.3385E-01 -1.5569E+00 3.1523E+00 -4.0808E+00 3.5401E+00 -2.1445E+00 S13 2.8347E-02 2.9067E-01 -1.0676E+00 2.2398E+00 -2.9632E+00 2.6200E+00 -1.6145E+00 S14 5.4049E-02 2.2820E-02 3.4677E-02 -1.5554E-01 2.2839E-01 -2.0781E-01 1.3194E-01 S15 -1.2344E-01 1.0369E-01 -8.2917E-02 5.2618E-02 -2.5266E-02 9.1641E-03 -2.5335E-03 S16 4.6425E-03 -2.3909E-02 4.2198E-02 -4.6204E-02 3.4425E-02 -1.7910E-02 6.6362E-03 Face number A18 A20 A22 A24 A26 A28 A30 S3 3.3674E-04 -8.1121E-05 1.2993E-05 -1.3997E-06 9.7877E-08 -4.0253E-09 7.4058E-11 S4 1.9124E+00 -8.6931E-01 2.8305E-01 -6.4342E-02 9.6928E-03 -8.6907E-04 3.5086E-05 S5 3.1902E+00 -1.5941E+00 5.6549E-01 -1.3909E-01 2.2551E-02 -2.1670E-03 9.3455E-05 S6 -2.2846E+00 -2.5727E+00 3.0145E+00 -1.5634E+00 4.6349E-01 -7.6017E-02 5.3751E-03 S7 2.6829E+01 -2.4232E+01 1.4574E+01 -5.8671E+00 1.5234E+00 -2.3104E-01 1.5565E-02 S8 1.9229E+03 -2.3018E+03 1.9674E+03 -1.1701E+03 4.5967E+02 -1.0716E+02 1.1219E+01 S9 -2.3491E+02 2.6200E+02 -2.0628E+02 1.1216E+02 -4.0090E+01 8.4773E+00 -8.0367E-01 S10 3.4802E-01 -1.8174E-01 7.4763E-02 -2.3248E-02 5.0667E-03 -6.7956E-04 4.1723E-05 S11 5.6576E-02 -1.7468E-02 3.9136E-03 -6.1774E-04 6.5035E-05 -4.0939E-06 1.1643E-07 S12 9.2895E-01 -2.9021E-01 6.4977E-02 -1.0182E-02 1.0612E-03 -6.6139E-05 1.8663E-06 S13 7.1036E-01 -2.2508E-01 5.1038E-02 -8.0862E-03 8.5051E-04 -5.3368E-05 1.5120E-06 S14 -6.0489E-02 2.0143E-02 -4.8203E-03 8.0666E-04 -8.9501E-05 5.9093E-06 -1.7561E-07 S15 5.3830E-04 -8.8007E-05 1.0936E-05 -9.9984E-07 6.3175E-08 -2.4475E-09 4.3478E-11 S16 -1.7702E-03 3.4023E-04 -4.6630E-05 4.4407E-06 -2.7902E-07 1.0393E-08 -1.7377E-10

[0158] Table 2

[0159] 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.

[0160] according to Figure 2 and Figure 3 It can be seen that the optical imaging lens assembly given in Example 1 can achieve good imaging quality.

[0161] Example 2

[0162] like Figures 4 to 6 As shown, the optical imaging lens group of Example 2 of the present application is described. Figure 4 A schematic diagram of the optical imaging lens assembly structure of Example 2 is shown. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0163] like Figure 4 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

[0164] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex. The eighth lens element E8 has positive refractive power. The object-side surface S15 of the eighth lens element is convex, and the image-side surface S16 of the eighth lens element is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface.

[0165] In this example, the effective focal length f of the optical imaging lens group is 1.25 mm, the maximum field of view FOV of the optical imaging lens group is 204°, and the aperture value Fno of the optical imaging lens group is 1.29.

[0166] Table 3 shows the basic structural parameters of the optical imaging lens assembly of Example 2, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0167]

[0168]

[0169] Table 3

[0170] 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.

[0171] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.4703E-01 -8.2837E-02 3.0753E-02 -3.5107E-04 -8.5350E-03 6.3680E-03 -2.7030E-03 S4 4.9625E-02 2.1079E-01 -6.3317E-01 1.1794E+00 -1.6253E+00 1.6695E+00 -1.2751E+00 S5 -2.3912E-01 7.0159E-01 -1.5801E+00 3.0311E+00 -4.6882E+00 5.5476E+00 -4.8873E+00 S6 -6.3601E-01 2.3044E+00 -4.9160E+00 7.2351E+00 -8.1751E+00 8.0848E+00 -7.5977E+00 S7 -3.5058E-01 1.3561E+00 -2.6363E+00 2.7039E+00 -4.5835E-01 -2.7897E+00 4.4159E+00 S8 3.6480E-02 4.9269E-01 -5.3987E+00 3.8423E+01 -1.8184E+02 5.9235E+02 -1.3603E+03 S9 4.3610E-03 -7.9651E-02 1.0156E+00 -7.3732E+00 3.3572E+01 -1.0176E+02 2.1333E+02 S10 -5.7168E-02 1.3847E-01 -3.8480E-01 8.7207E-01 -1.4781E+00 1.8275E+00 -1.6425E+00 S11 -5.8474E-02 1.0666E-01 -1.7146E-01 2.1992E-01 -2.1283E-01 1.5316E-01 -8.1845E-02 S12 -2.2126E-01 4.7810E-01 -1.2549E+00 2.4206E+00 -3.0556E+00 2.5993E+00 -1.5450E+00 S13 2.6825E-02 2.7594E-01 -8.8074E-01 1.7052E+00 -2.1535E+00 1.8394E+00 -1.0987E+00 S14 3.5332E-02 6.8401E-02 -4.1059E-02 -7.1965E-02 1.5883E-01 -1.5979E-01 1.0401E-01 S15 -1.2632E-01 1.1343E-01 -9.3798E-02 6.0047E-02 -2.8817E-02 1.0395E-02 -2.8401E-03 S16 -9.2499E-03 2.1358E-02 -3.0599E-02 2.8671E-02 -1.7945E-02 7.7544E-03 -2.3513E-03 Face number A18 A20 A22 A24 A26 A28 A30 S3 7.7110E-04 -1.5441E-04 2.1835E-05 -2.1406E-06 1.3864E-07 -5.3416E-09 9.2782E-11 S4 7.2316E-01 -3.0273E-01 9.2142E-02 -1.9804E-02 2.8472E-03 -2.4566E-04 9.6178E-06 S5 3.1705E+00 -1.5019E+00 5.1196E-01 -1.2213E-01 1.9335E-02 -1.8241E-03 7.7590E-05 S6 6.4407E+00 -4.3941E+00 2.2155E+00 -7.7925E-01 1.7963E-01 -2.4330E-02 1.4665E-03 S7 -3.5818E+00 1.7697E+00 -5.1616E-01 6.5487E-02 7.1650E-03 -3.4841E-03 3.3890E-04 S8 2.2325E+03 -2.6267E+03 2.1966E+03 -1.2738E+03 4.8670E+02 -1.1017E+02 1.1190E+01 S9 -3.1625E+02 3.3434E+02 -2.5066E+02 1.3025E+02 -4.4624E+01 9.0679E+00 -8.2790E-01 S10 1.0693E+00 -4.9926E-01 1.6360E-01 -3.6139E-02 4.9910E-03 -3.6891E-04 9.5855E-06 S11 3.2438E-02 -9.4758E-03 2.0095E-03 -3.0040E-04 2.9969E-05 -1.7890E-06 4.8288E-08 S12 6.5638E-01 -2.0100E-01 4.4093E-02 -6.7672E-03 6.9067E-04 -4.2140E-05 1.1637E-06 S13 4.6891E-01 -1.4409E-01 3.1679E-02 -4.8653E-03 4.9604E-04 -3.0174E-05 8.2892E-07 S14 -4.7412E-02 1.5476E-02 -3.6066E-03 5.8623E-04 -6.3140E-05 4.0486E-06 -1.1696E-07 S15 5.9023E-04 -9.3116E-05 1.1015E-05 -9.4926E-07 5.6324E-08 -2.0540E-09 3.4584E-11 S16 5.0223E-04 -7.4896E-05 7.5846E-06 -4.8972E-07 1.7288E-08 -1.7321E-10 -4.6228E-12

[0172] Table 4

[0173] Figure 5 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 6 The astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature.

[0174] according to Figure 5 and Figure 6It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0175] Example 3

[0176] like Figures 7 to 9 As shown, the optical imaging lens group of Example 3 of this application is described. Figure 7 A schematic diagram of the optical imaging lens group structure of Example 3 is shown.

[0177] like Figure 7 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

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

[0179] In this example, the effective focal length f of the optical imaging lens group is 1.25 mm, the maximum field of view FOV of the optical imaging lens group is 200°, and the aperture value Fno of the optical imaging lens group is 1.31.

[0180] Table 5 shows the basic structural parameters of the optical imaging lens assembly of Example 3, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0181]

[0182]

[0183] Table 5

[0184] 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.

[0185] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.5290E-01 -9.8030E-02 5.3618E-02 -2.1457E-02 5.0097E-03 1.4489E-04 -6.3820E-04 S4 -1.4076E-01 1.2419E+00 -5.2124E+00 1.4299E+01 -2.6643E+01 3.4806E+01 -3.2586E+01 S5 -2.0737E-01 9.5973E-01 -3.8544E+00 1.1080E+01 -2.1936E+01 3.0544E+01 -3.0510E+01 S6 -3.0899E-01 1.5884E+00 -5.4241E+00 1.1055E+01 -1.0014E+01 -8.7941E+00 4.0608E+01 S7 -2.4918E-01 1.4561E+00 -5.4719E+00 1.2832E+01 -1.7292E+01 7.5859E+00 1.7014E+01 S8 5.5609E-02 3.1352E-01 -3.3601E+00 2.4576E+01 -1.2226E+02 4.2770E+02 -1.0713E+03 S9 -7.6829E-03 7.0998E-02 -8.8686E-01 6.7073E+00 -3.3002E+01 1.1112E+02 -2.6269E+02 S10 -6.3771E-02 8.9080E-02 1.2480E-02 -5.5837E-01 1.7222E+00 -3.0348E+00 3.5639E+00 S11 -7.9679E-02 1.5289E-01 -2.3527E-01 2.7697E-01 -2.4111E-01 1.5348E-01 -7.0809E-02 S12 -2.1861E-01 5.4110E-01 -1.6601E+00 3.2338E+00 -3.9380E+00 3.1952E+00 -1.8042E+00 S13 3.3340E-02 3.0332E-01 -1.1301E+00 2.2180E+00 -2.6575E+00 2.0783E+00 -1.0995E+00 S14 4.9049E-02 3.1942E-02 3.0260E-02 -1.4457E-01 2.0490E-01 -1.7994E-01 1.1056E-01 S15 -1.3143E-01 1.1327E-01 -9.7803E-02 6.9525E-02 -3.9472E-02 1.7971E-02 -6.5078E-03 S16 9.2737E-03 -3.8440E-02 5.8078E-02 -5.8600E-02 4.0548E-02 -1.9501E-02 6.6482E-03 Face number A18 A20 A22 A24 A26 A28 A30 S3 2.7512E-04 -6.8505E-05 1.1256E-05 -1.2415E-06 8.8831E-08 -3.7373E-09 7.0324E-11 S4 2.2118E+01 -1.0897E+01 3.8549E+00 -9.5368E-01 1.5652E-01 -1.5301E-02 6.7394E-04 S5 2.2097E+01 -1.1612E+01 4.3786E+00 -1.1535E+00 2.0135E-01 -2.0908E-02 9.7686E-04 S6 -6.1637E+01 5.5859E+01 -3.3215E+01 1.3113E+01 -3.3217E+00 4.8989E-01 -3.2036E-02 S7 -3.8787E+01 4.0773E+01 -2.6499E+01 1.1175E+01 -2.9902E+00 4.6301E-01 -3.1675E-02 S8 1.9392E+03 -2.5366E+03 2.3711E+03 -1.5424E+03 6.6240E+02 -1.6867E+02 1.9267E+01 S9 4.4139E+02 -5.2824E+02 4.4613E+02 -2.5941E+02 9.8705E+01 -2.2104E+01 2.2075E+00 S10 -2.9213E+00 1.6940E+00 -6.9075E-01 1.9314E-01 -3.5095E-02 3.7087E-03 -1.7127E-04 S11 2.3238E-02 -5.1980E-03 7.1070E-04 -3.6909E-05 -4.6027E-06 8.7025E-07 -4.2862E-08 S12 7.2607E-01 -2.1001E-01 4.3410E-02 -6.2732E-03 6.0428E-04 -3.5065E-05 9.3533E-07 S13 3.9707E-01 -9.5821E-02 1.4285E-02 -9.7141E-04 -4.6765E-05 1.3180E-05 -6.9148E-07 S14 -4.9167E-02 1.5912E-02 -3.7085E-03 6.0588E-04 -6.5798E-05 4.2631E-06 -1.2461E-07 S15 1.8351E-03 -3.9210E-04 6.1556E-05 -6.8279E-06 5.0404E-07 -2.2148E-08 4.3740E-10 S16 -1.6260E-03 2.8585E-04 -3.5771E-05 3.1071E-06 -1.7799E-07 6.0469E-09 -9.2318E-11

[0186] Table 6

[0187] Figure 8 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 9 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.

[0188] according to Figure 8 and Figure 9 It can be seen that the optical imaging lens assembly given in Example 3 can achieve good imaging quality.

[0189] Example 4

[0190] like Figures 10 to 12 As shown, the optical imaging lens group of Example 4 of the present application is described. Figure 10 A schematic diagram of the optical imaging lens group structure of Example 4 is shown.

[0191] like Figure 10 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

[0192] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex. The eighth lens element E8 has positive refractive power. The object-side surface S15 of the eighth lens element is convex, and the image-side surface S16 of the eighth lens element is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface.

[0193] In this example, the effective focal length f of the optical imaging lens group is 1.16 mm, the maximum field of view FOV of the optical imaging lens group is 190°, and the aperture value Fno of the optical imaging lens group is 1.30.

[0194] Table 7 shows the basic structural parameters of the optical imaging lens assembly of Example 4, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0195]

[0196]

[0197] Table 7

[0198] 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.

[0199] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.4778E-01 -9.0319E-02 5.0899E-02 -2.6730E-02 1.2547E-02 -4.9929E-03 1.6185E-03 S4 6.4554E-04 2.0280E-01 -5.2668E-01 1.1130E+00 -1.8016E+00 2.1104E+00 -1.7747E+00 S5 -1.9977E-01 3.7578E-01 -4.5887E-01 5.6370E-01 -7.3311E-01 8.3921E-01 -7.3033E-01 S6 -4.2727E-01 9.5282E-01 1.6418E-01 -6.0076E+00 1.7321E+01 -2.8282E+01 3.0413E+01 S7 -2.5648E-01 6.2895E-01 -8.5660E-03 -3.3424E+00 8.9759E+00 -1.2284E+01 9.1031E+00 S8 2.8261E-02 7.4304E-01 -7.8639E+00 5.3808E+01 -2.4835E+02 8.0261E+02 -1.8556E+03 S9 -1.0587E-02 1.4142E-01 -1.1620E+00 5.8594E+00 -1.9231E+01 4.2619E+01 -6.4697E+01 S10 -5.6491E-02 1.1413E-01 -2.3879E-01 3.9663E-01 -4.8301E-01 4.0079E-01 -2.0067E-01 S11 -6.7380E-02 1.3202E-01 -2.2735E-01 3.1306E-01 -3.2502E-01 2.5030E-01 -1.4272E-01 S12 -2.3314E-01 4.9713E-01 -1.4010E+00 2.8646E+00 -3.7772E+00 3.3426E+00 -2.0673E+00 S13 2.8644E-02 2.6746E-01 -9.2853E-01 1.9118E+00 -2.5237E+00 2.2389E+00 -1.3882E+00 S14 4.5052E-02 5.9774E-02 -3.0270E-02 -9.3853E-02 1.9564E-01 -2.0225E-01 1.3764E-01 S15 -1.3351E-01 1.2627E-01 -1.1437E-01 8.1307E-02 -4.2827E-02 1.6570E-02 -4.7228E-03 S16 1.0984E-02 -3.8771E-02 8.0671E-02 -1.0523E-01 9.2178E-02 -5.5695E-02 2.3675E-02 Face number A18 A20 A22 A24 A26 A28 A30 S3 -4.1297E-04 8.0388E-05 -1.1568E-05 1.1832E-06 -8.1004E-08 3.3184E-09 -6.1375E-11 S4 1.0742E+00 -4.6737E-01 1.4457E-01 -3.0961E-02 4.3547E-03 -3.6095E-04 1.3324E-05 S5 4.5733E-01 -2.0168E-01 6.1261E-02 -1.2307E-02 1.5095E-03 -9.4784E-05 1.7734E-06 S6 -2.2303E+01 1.1057E+01 -3.5143E+00 6.0786E-01 -1.6071E-02 -1.2529E-02 1.5527E-03 S7 -1.8478E+00 -3.2117E+00 3.6586E+00 -1.9247E+00 5.7978E-01 -9.6372E-02 6.8872E-03 S8 3.1014E+03 -3.7484E+03 3.2393E+03 -1.9485E+03 7.7362E+02 -1.8194E+02 1.9160E+01 S9 6.6489E+01 -4.3650E+01 1.4717E+01 1.1405E+00 -3.3075E+00 1.2593E+00 -1.6892E-01 S10 2.9595E-02 3.5993E-02 -3.0707E-02 1.2168E-02 -2.7732E-03 3.4880E-04 -1.8765E-05 S11 6.0200E-02 -1.8671E-02 4.1939E-03 -6.6242E-04 6.9631E-05 -4.3647E-06 1.2320E-07 S12 9.1528E-01 -2.9258E-01 6.7098E-02 -1.0776E-02 1.1513E-03 -7.3522E-05 2.1234E-06 S13 6.1602E-01 -1.9732E-01 4.5334E-02 -7.2907E-03 7.7941E-04 -4.9736E-05 1.4326E-06 S14 -6.6096E-02 2.2833E-02 -5.6509E-03 9.7819E-04 -1.1245E-04 7.7094E-06 -2.3842E-07 S15 9.9544E-04 -1.5530E-04 1.7852E-05 -1.4898E-06 8.6971E-08 -3.2383E-09 5.8689E-11 S16 -7.1549E-03 1.5382E-03 -2.3265E-04 2.4090E-05 -1.6178E-06 6.3089E-08 -1.0752E-09

[0200] Table 8

[0201] Figure 11 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 12 An astigmatism curve of the optical imaging lens group of Example 4 is shown, which indicates meridional field curvature and sagittal field curvature.

[0202] according to Figure 11 and Figure 12 It can be seen that the optical imaging lens assembly given in Example 4 can achieve good imaging quality.

[0203] Example 5

[0204] like Figures 13 to 15 As shown, the optical imaging lens group of Example 5 of the present application is described. Figure 13 A schematic diagram of the optical imaging lens group structure of Example 5 is shown.

[0205] like Figure 13 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

[0206] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex. The eighth lens element E8 has positive refractive power. The object-side surface S15 of the eighth lens element is convex, and the image-side surface S16 of the eighth lens element is concave. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface.

[0207] In this example, the effective focal length f of the optical imaging lens group is 0.96 mm, the maximum field of view FOV of the optical imaging lens group is 190°, and the aperture value Fno of the optical imaging lens group is 1.43.

[0208] Table 9 shows the basic structural parameters of the optical imaging lens assembly of Example 5, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0209]

[0210]

[0211] Table 9

[0212] 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.

[0213] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.5065E-01 -1.2009E-01 1.0547E-01 -7.9038E-02 4.4877E-02 -1.8663E-02 5.6342E-03 S4 3.8701E-02 1.3487E-02 -2.1301E-02 9.3721E-02 -8.7787E-02 -1.4505E-01 3.9838E-01 S5 -1.8315E-01 3.1748E-01 -4.0288E-01 7.9785E-01 -1.5871E+00 2.1910E+00 -2.0447E+00 S6 -4.9759E-01 1.8383E+00 -6.5307E+00 2.5479E+01 -7.6329E+01 1.5582E+02 -2.1882E+02 S7 -3.1077E-01 1.2164E+00 -4.4392E+00 1.7648E+01 -5.3164E+01 1.0805E+02 -1.4985E+02 S8 4.4049E-02 8.5503E-02 -1.0310E+00 7.6955E+00 -3.6316E+01 1.1578E+02 -2.5816E+02 S9 -1.3672E-02 3.0638E-01 -4.3532E+00 3.6666E+01 -1.9942E+02 7.3758E+02 -1.9145E+03 S10 -5.2378E-02 1.3027E-01 -3.6590E-01 8.7797E-01 -1.5304E+00 1.7375E+00 -1.0703E+00 S11 -7.1237E-02 1.4269E-01 -2.7994E-01 4.7140E-01 -6.1946E-01 6.1403E-01 -4.5370E-01 S12 -2.3715E-01 3.6586E-01 -7.4437E-01 1.3561E+00 -1.6439E+00 1.2787E+00 -6.3317E-01 S13 1.8960E-02 2.7926E-01 -8.1551E-01 1.5342E+00 -1.9505E+00 1.7102E+00 -1.0660E+00 S14 4.7082E-02 1.0641E-01 -2.1238E-01 2.4429E-01 -2.0348E-01 1.2768E-01 -6.0293E-02 S15 -1.2033E-01 9.4206E-02 -7.9348E-02 5.3907E-02 -2.3331E-02 4.1495E-03 1.5780E-03 S16 2.1735E-02 -4.4857E-02 7.1180E-02 -8.9422E-02 8.1078E-02 -5.0268E-02 2.0993E-02 Face number A18 A20 A22 A24 A26 A28 A30 S3 -1.2299E-03 1.9299E-04 -2.1531E-05 1.6766E-06 -8.8388E-08 2.9558E-09 -5.0134E-11 S4 -4.1298E-01 2.4664E-01 -9.3009E-02 2.2534E-02 -3.4068E-03 2.9277E-04 -1.0919E-05 S5 1.3289E+00 -6.1392E-01 2.0199E-01 -4.6394E-02 7.0727E-03 -6.4236E-04 2.6257E-05 S6 2.1626E+02 -1.5219E+02 7.6007E+01 -2.6359E+01 6.0416E+00 -8.2348E-01 5.0568E-02 S7 1.4517E+02 -9.9347E+01 4.7810E+01 -1.5805E+01 3.4084E+00 -4.3010E-01 2.3967E-02 S8 4.1006E+02 -4.6626E+02 3.7638E+02 -2.1041E+02 7.7391E+01 -1.6837E+01 1.6412E+00 S9 3.5461E+03 -4.7070E+03 4.4406E+03 -2.9048E+03 1.2518E+03 -3.1948E+02 3.6559E+01 S10 -1.3095E-02 6.4704E-01 -6.0133E-01 2.9371E-01 -8.4541E-02 1.3579E-02 -9.4319E-04 S11 2.4821E-01 -9.9637E-02 2.8868E-02 -5.8585E-03 7.8840E-04 -6.3083E-05 2.2682E-06 S12 1.8413E-01 -1.7881E-02 -8.2197E-03 3.8987E-03 -7.7521E-04 7.9331E-05 -3.4125E-06 S13 4.8296E-01 -1.6031E-01 3.8589E-02 -6.5189E-03 7.2287E-04 -4.6076E-05 1.2175E-06 S14 2.0654E-02 -4.6338E-03 4.6516E-04 6.5522E-05 -2.8985E-05 3.8556E-06 -1.9138E-07 S15 -1.3745E-03 4.8735E-04 -1.0564E-04 1.4893E-05 -1.3396E-06 7.0121E-08 -1.6295E-09 S16 -5.7998E-03 1.0031E-03 -8.9121E-05 -8.9084E-07 1.0837E-06 -1.0200E-07 3.2853E-09

[0214] Table 10

[0215] Figure 14 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 15 An astigmatism curve of the optical imaging lens group of Example 5 is shown, which indicates meridional field curvature and sagittal field curvature.

[0216] according to Figure 14 and Figure 15It can be seen that the optical imaging lens assembly given in Example 5 can achieve good imaging quality.

[0217] Example 6

[0218] like Figures 16 to 18 As shown, the optical imaging lens group of Example 6 of the present application is described. Figure 16 A schematic diagram of the optical imaging lens group structure of Example 6 is shown.

[0219] like Figure 16 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, an aperture STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a protective glass and an imaging surface.

[0220] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex. The eighth lens element E8 has positive refractive power. The object-side surface S15 of the eighth lens element is convex, and the image-side surface S16 of the eighth lens element is convex. Light from an object passes through each surface S1 to S16 in sequence and is ultimately imaged on the imaging surface.

[0221] In this example, the effective focal length f of the optical imaging lens group is 1.02 mm, the maximum field of view FOV of the optical imaging lens group is 200°, and the aperture value Fno of the optical imaging lens group is 1.40.

[0222] Table 11 shows the basic structural parameters of the optical imaging lens assembly of Example 6, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0223]

[0224]

[0225] Table 11

[0226] 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.

[0227] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.4800E-01 -8.9688E-02 4.6685E-02 -1.9025E-02 5.2545E-03 -6.2056E-04 -1.8482E-04 S4 1.5192E-02 9.5905E-02 -8.7675E-02 -2.2669E-02 1.2849E-01 -1.3285E-01 5.6657E-02 S5 -1.9966E-01 3.0309E-01 -4.7496E-02 -5.9283E-01 1.3042E+00 -1.5841E+00 1.2813E+00 S6 -4.0873E-01 6.3147E-01 2.5082E+00 -1.6048E+01 4.5351E+01 -8.1925E+01 1.0289E+02 S7 -2.2774E-01 2.7615E-01 2.4366E+00 -1.3925E+01 3.9050E+01 -7.0810E+01 8.9359E+01 S8 -3.4578E-03 1.2559E+00 -1.3568E+01 9.7723E+01 -4.8469E+02 1.7077E+03 -4.3564E+03 S9 4.7299E-02 -1.2234E+00 1.6099E+01 -1.2971E+02 6.9077E+02 -2.5462E+03 6.6765E+03 S10 -1.0670E-01 7.0631E-01 -3.9504E+00 1.5067E+01 -3.9346E+01 7.2179E+01 -9.4970E+01 S11 -7.9823E-02 1.9961E-01 -4.6098E-01 8.4141E-01 -1.1328E+00 1.1119E+00 -7.9873E-01 S12 -2.3282E-01 5.3193E-01 -1.5740E+00 3.2405E+00 -4.2665E+00 3.7688E+00 -2.3288E+00 S13 2.4187E-02 3.1124E-01 -1.1115E+00 2.3018E+00 -3.0163E+00 2.6371E+00 -1.5993E+00 S14 5.3585E-02 1.8873E-02 6.3269E-02 -2.4701E-01 3.9243E-01 -3.9469E-01 2.7637E-01 S15 -1.1627E-01 9.3442E-02 -7.2874E-02 4.0763E-02 -1.2437E-02 -6.3731E-04 2.4811E-03 S16 1.0579E-03 -7.6072E-03 1.5306E-02 -1.7145E-02 9.9133E-03 -3.1539E-04 -3.9019E-03 Face number A18 A20 A22 A24 A26 A28 A30 S3 1.1675E-04 -3.1581E-05 5.3486E-06 -5.9907E-07 4.3354E-08 -1.8448E-09 3.5160E-11 S4 9.4463E-03 -2.5851E-02 1.5462E-02 -5.0801E-03 9.9049E-04 -1.0764E-04 5.0377E-06 S5 -7.2326E-01 2.8720E-01 -7.9122E-02 1.4587E-02 -1.6762E-03 1.0368E-04 -2.3477E-06 S6 -9.2500E+01 5.9946E+01 -2.7774E+01 8.9692E+00 -1.9168E+00 2.4353E-01 -1.3923E-02 S7 -8.0631E+01 5.2367E+01 -2.4273E+01 7.8271E+00 -1.6665E+00 2.1038E-01 -1.1913E-02 S8 8.1202E+03 -1.1051E+04 1.0851E+04 -7.4777E+03 3.4291E+03 -9.3904E+02 1.1611E+02 S9 -1.2631E+04 1.7286E+04 -1.6947E+04 1.1599E+04 -5.2620E+03 1.4213E+03 -1.7297E+02 S10 9.0642E+01 -6.2824E+01 3.1291E+01 -1.0909E+01 2.5262E+00 -3.4894E-01 2.1753E-02 S11 4.2120E-01 -1.6258E-01 4.5355E-02 -8.8954E-03 1.1630E-03 -9.0972E-05 3.2201E-06 S12 1.0314E+00 -3.3035E-01 7.6075E-02 -1.2307E-02 1.3303E-03 -8.6426E-05 2.5573E-06 S13 6.8739E-01 -2.1047E-01 4.5397E-02 -6.6820E-03 6.2931E-04 -3.3226E-05 7.0226E-07 S14 -1.3887E-01 5.0425E-02 -1.3122E-02 2.3861E-03 -2.8788E-04 2.0701E-05 -6.7140E-07 S15 -1.1822E-03 3.0595E-04 -4.7316E-05 4.0439E-06 -1.1325E-07 -8.3352E-09 5.5691E-10 S16 3.1238E-03 -1.3227E-03 3.5210E-04 -6.0788E-05 6.6290E-06 -4.1596E-07 1.1463E-08

[0228] Table 12

[0229] Figure 17 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 18 An astigmatism curve of the optical imaging lens group of Example 6 is shown, which indicates meridional field curvature and sagittal field curvature.

[0230] according to Figure 17 and Figure 18 It can be seen that the optical imaging lens assembly given in Example 6 can achieve good imaging quality.

[0231] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0232] Conditional\Example 1 2 3 4 5 6 R6 / R7 1.03 0.91 1.13 1.01 0.90 1.01 (CT3+CT4) / T34 53.56 41.97 61.58 50.44 47.49 37.76 CT2 / CT7 1.18 1.39 1.02 1.16 1.91 1.33 CT6 / f*V6 148.29 154.39 133.28 154.36 132.19 125.72 T12 / SAG12 1.09 1.11 1.09 1.10 1.07 1.08 T12 / ∑AT 0.60 0.60 0.60 0.59 0.61 0.63 (SAG11 / CT1) / (R1 / f1) -1.51 -1.38 -1.28 -1.28 -0.67 -0.84 (f1+f2) / f4 -2.53 -2.38 -2.58 -2.50 -3.30 -2.52 R13 / R15 -0.86 -0.87 -0.84 -0.89 -0.84 -0.85 T45 / (T56+T67+T78) 1.67 1.55 1.68 1.76 1.83 1.36 f6 / f7 -1.01 -1.02 -0.97 -1.00 -1.03 -0.97 Tr1r8 / Tr9r16 0.89 0.91 0.88 0.94 1.49 1.25 f1 / f -4.57 -4.50 -4.79 -4.73 -5.12 -5.26 f2 / f -2.66 -3.03 -1.97 -2.86 -4.26 -3.20 f4 / f 2.86 3.17 2.62 3.03 2.84 3.36 f8 / f 2.65 2.68 2.57 2.77 3.30 2.98 f34 / f 6.91 10.62 3.58 7.69 11.30 8.55 f67 / f 18.95 19.45 16.01 20.29 43.87 27.81 CT6 / CT7+CT8 / CT7 9.34 9.63 8.74 10.10 8.96 7.67 (R13+R14)*V7 / f7 19.23 19.06 19.70 19.03 20.85 19.17 (DT11-DT12) / DT12 0.92 0.89 0.96 0.98 2.30 1.45 (DT11-DT42) / (DT82-DT51) 2.60 2.73 2.71 3.31 4.70 4.28 SAG52 / f5-SAG61 / f6 -0.26 -0.22 -0.23 -0.25 -0.19 -0.20 SAG71 / CT7 2.09 2.11 2.01 2.20 2.10 1.78 tan(FOV / 4)*DT11 / TD 0.59 0.52 0.56 0.47 0.60 0.61 tan(FOV / 3) / (Fno*f) 1.76 1.53 1.42 1.32 1.44 1.61

[0233] Table 13

[0234] 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 f8 of each lens, etc.

[0235]

[0236]

[0237] Table 14

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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 assembly is composed of eight lenses with optical power, and the eight lenses with optical power are arranged in the following order from the object side to the image side: a first lens having negative optical power; a second lens having negative optical power; a third lens having negative optical power; a fourth lens element having positive optical power; a fifth lens having positive refractive power; a sixth lens having positive optical power; a seventh lens element having negative optical power; an eighth lens having positive optical power; wherein at least one of the first to eighth lenses comprises a glass lens, the sixth lens has the largest central thickness; the effective focal length f1 of the first lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: -5.26≤f1 / f≤-4.50; the effective focal length f2 of the second lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: -4.26≤f2 / f≤-1.97; the effective focal length f4 of the fourth lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: 2.62≤f4 / f≤3.36; the effective focal length f8 of the eighth lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: 2.57≤f8 / f≤3.30; the central thickness CT6 of the sixth lens on the optical axis, the effective focal length f of the optical imaging lens group, and the Abbe number V6 of the sixth lens satisfy the following relationship: 125.72≤CT6 / f*V6≤154.39; 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 concave, and the image-side surface is concave; the object-side surface of the third lens is convex, and the image-side surface is concave; the object-side surface of the fourth lens is convex; the object-side surface of the fifth lens is concave, and the image-side surface is convex; the object-side surface of the sixth lens is convex, and the image-side surface is convex; the object-side surface of the seventh lens is concave, and the image-side surface is convex; and the object-side surface of the eighth lens is convex.

2. The optical imaging lens assembly according to claim 1, wherein: The combined focal length f34 of the third lens and the fourth lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: 3.58≤f34 / f≤11.

30.

3. The optical imaging lens assembly according to claim 1, wherein: The combined focal length f67 of the sixth lens and the seventh lens satisfies the following relationship with the effective focal length f of the optical imaging lens group: 16.01≤f67 / f≤43.

87.

4. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R6 of the image-side surface of the third lens and a curvature radius R7 of the object-side surface of the fourth lens satisfy the following relationship: 0.90≤R6 / R7≤1.

13.

5. The optical imaging lens assembly according to claim 1, wherein: 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 distance T34 from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis satisfy the following: 37.76≤(CT3+CT4) / T34≤61.

58.

6. The optical imaging lens assembly according to claim 1, wherein: A center thickness CT2 of the second lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy the following: 1.02≤CT2 / CT7≤1.

91.

7. The optical imaging lens assembly according to claim 1, wherein: The distance T12 from the image side surface of the first lens to the object side surface of the second lens on the optical axis and the on-axis spacing distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the effective radius vertex of the image side surface of the first lens satisfy the following: 1.07≤T12 / SAG12≤1.

11.

8. The optical imaging lens assembly according to claim 1, wherein: Among the on-axis spacings between two adjacent lenses from the first lens to the eighth lens, the on-axis spacing between the first lens and the second lens is the largest; and a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens and a sum ∑AT of the on-axis spacings between every two adjacent lenses from the first lens to the eighth lens satisfy the following: 0.59≤T12 / ∑AT≤0.

63.

9. The optical imaging lens assembly according to claim 1, wherein: The on-axis spacing distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the effective radius vertex of the object side surface of the first lens, the center thickness CT1 of the first lens on the optical axis, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy the following: -1.51≤(SAG11 / CT1) / (R1 / f1)≤-0.

67.

10. 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, and the effective focal length f4 of the fourth lens satisfy the following: -3.30≤(f1+f2) / f4≤-2.

38.

11. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R13 of the object-side surface of the seventh lens and a curvature radius R15 of the object-side surface of the eighth lens satisfy the relationship: -0.89≤R13 / R15≤-0.

84.

12. The optical imaging lens assembly according to claim 1, wherein: An on-axis distance T45 between the fourth lens and the fifth lens, an on-axis distance T56 between the fifth lens and the sixth lens, an on-axis distance T67 between the sixth lens and the seventh lens, and an on-axis distance T78 between the seventh lens and the eighth lens satisfy the following relationship: 1.36≤T45 / (T56+T67+T78)≤1.

83.

13. The optical imaging lens assembly according to claim 1, wherein: The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy the following: -1.03≤f6 / f7≤-0.

97.

14. The optical imaging lens assembly according to claim 1, wherein: An on-axis distance Tr1r8 between the object side surface of the first lens and the image side surface of the fourth lens and an on-axis distance Tr9r16 between the object side surface of the fifth lens and the image side surface of the eighth lens satisfy the following: 0.88≤Tr1r8 / Tr9r16≤1.

49.

15. The optical imaging lens assembly according to claim 1, wherein: A center thickness CT6 of the sixth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy the following relationship: 7.67≤CT6 / CT7+CT8 / CT7≤10.

10.

16. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R13 of the object-side surface of the seventh lens, a curvature radius R14 of the image-side surface of the seventh lens, an Abbe number V7 of the seventh lens, and an effective focal length f7 of the seventh lens satisfy the following relationship: 19.03≤(R13+R14)*V7 / f7≤20.

85.

17. The optical imaging lens assembly according to claim 1, wherein: The effective semi-aperture DT11 of the object-side surface of the first lens and the effective semi-aperture DT12 of the image-side surface of the first lens satisfy the following: 0.89≤(DT11-DT12) / DT12≤2.

30.

18. The optical imaging lens assembly according to claim 1, wherein: The effective semi-aperture DT11 of the object-side surface of the first lens, the effective semi-aperture DT42 of the image-side surface of the fourth lens, the effective semi-aperture DT82 of the image-side surface of the eighth lens, and the effective semi-aperture DT51 of the object-side surface of the fifth lens satisfy the following: 2.60≤(DT11-DT42) / (DT82-DT51)≤4.

70.

19. The optical imaging lens assembly according to any one of claims 1 to 18, wherein: The on-axis spacing 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 effective focal length f5 of the fifth lens, the on-axis spacing distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens, and the effective focal length f6 of the sixth lens satisfy: -0.26≤SAG52 / f5-SAG61 / f6≤-0.

19.

20. The optical imaging lens assembly according to any one of claims 1 to 18, wherein: An on-axis spacing distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens and a center thickness CT7 of the seventh lens on the optical axis satisfy the following: 1.78≤SAG71 / CT7≤2.

20.

21. The optical imaging lens assembly according to any one of claims 1 to 18, wherein: The maximum field of view FOV of the optical imaging lens group, the effective semi-aperture DT11 of the object side surface of the first lens, and the on-axis distance TD from the object side surface of the first lens to the image side surface of the eighth lens satisfy the following: 0.47≤tan(FOV / 4)*DT11 / TD≤0.

61.

22. The optical imaging lens assembly according to any one of claims 1 to 18, wherein: The maximum field of view FOV of the optical imaging lens group, the aperture number Fno of the optical imaging lens group and the effective focal length f of the optical imaging lens group satisfy the following: 1.32≤tan(FOV / 3) / (Fno*f)≤1.76.

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