Optical imaging lens set

Abstract

The present application discloses an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with optical power; a third lens with optical power, whose image side surface is convex; a fourth lens with positive optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power, whose image side surface is convex; and an eighth lens with negative optical power. The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens group satisfy: 2<f4 / f<3.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical imaging lens group. Background Art

[0002] With the development of optical technology, the market has put forward higher requirements on the imaging quality of optical imaging lens groups used in electronic products such as smart phones. At the same time, the imaging quality of optical imaging lens groups is getting higher and higher. In particular, in a well-lit environment, the imaging quality of mobile phone lenses is close to reality. However, due to the limitation of lens size, its imaging quality in a low-light environment is not very ideal.

[0003] At present, in order to reduce the noise generated by the lens when shooting in low light, most lens designers take multiple photos with different exposure values ​​at the same time and use algorithms to synthesize a photo with accurate exposure of the entire picture. Although this technology can effectively suppress noise, the color distortion of the synthesized photo is obvious, especially when shooting with a wide-angle lens, the color distortion is more prominent. Summary of the invention

[0004] On one hand, the present application provides such an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with optical power; a third lens with optical power, whose image side surface is convex; a fourth lens with positive optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power, whose image side surface is convex; and an eighth lens with negative optical power. The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens group can satisfy: 2<f4 / f<3.

[0005] In one embodiment, there is at least one aspherical mirror surface from the object side surface of the first lens to the image side surface of the eighth lens.

[0006] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens may satisfy: 0.5<f1 / f8<1.

[0007] In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens may satisfy: 0.8<|f7 / f8|<1.3.

[0008] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 0<10×(R3-R4) / (R3+R4)<1.

[0009] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R16 of the image-side surface of the eighth lens may satisfy: 0.5<R2 / R16<1.5.

[0010] In one embodiment, a center thickness CT2 of the second lens on the optical axis and an edge thickness ET2 of the second lens may satisfy: 0.9<CT2 / ET2<1.3.

[0011] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: CT1 / CT2+CT1 / CT3<1.

[0012] In one embodiment, the spacing distance T45 between the image side surface of the fourth lens and the object side surface of the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the spacing distance T56 between the image side surface of the fifth lens and the object side surface of the sixth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5<T45 / (CT5+T56+CT6)<1.

[0013] In one embodiment, 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 may satisfy: 2.9<CT7 / CT8<4.5.

[0014] In one embodiment, a distance T78 between the image side surface of the seventh lens and the object side surface of the eighth lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis may satisfy: 0.9<T78 / CT8<1.4.

[0015] In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT82 of the image-side surface of the eighth lens may satisfy: 1<DT11 / DT82<1.5.

[0016] In one embodiment, the maximum effective radius DT41 of the object-side surface of the fourth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens may satisfy: 0.6<DT41 / DT52<1.

[0017] In one embodiment, a distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis may satisfy: 0.6<SAG11 / CT1<1.1.

[0018] In one embodiment, an edge thickness ET1 of the first lens and an edge thickness ET8 of the eighth lens may satisfy: 0.8<ET1 / ET8<1.2.

[0019] In one embodiment, the distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis and the distance SAG81 from the intersection of the object side surface of the eighth lens and the optical axis to the vertex of the effective radius of the object side surface of the eighth lens on the optical axis may satisfy: 0.3<SAG72 / SAG81<0.6.

[0020] In one embodiment, a distance SAG71 from an intersection of the object side surface of the seventh lens and the optical axis to a vertex of an effective radius of the object side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.2<SAG71 / CT7<0.5.

[0021] In one embodiment, the object-side surface of the fourth lens is a convex surface; and the object-side surface of the seventh lens is a convex surface.

[0022] In one embodiment, the maximum field of view FOV of the optical imaging lens group may satisfy: tan(FOV / 2)>2.

[0023] On the other hand, the present application provides an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with optical power; a third lens with optical power, whose image-side surface is convex; a fourth lens with positive optical power, whose object-side surface is convex; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power, whose object-side surface is convex and whose image-side surface is convex; and an eighth lens with negative optical power.

[0024] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens may satisfy: 0.5<f1 / f8<1.

[0025] In one embodiment, the effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens may satisfy: 0.8<|f7 / f8|<1.3.

[0026] In one embodiment, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 0<10×(R3-R4) / (R3+R4)<1.

[0027] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R16 of the image-side surface of the eighth lens may satisfy: 0.5<R2 / R16<1.5.

[0028] In one embodiment, a center thickness CT2 of the second lens on the optical axis and an edge thickness ET2 of the second lens may satisfy: 0.9<CT2 / ET2<1.3.

[0029] In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis may satisfy: CT1 / CT2+CT1 / CT3<1.

[0030] In one embodiment, the spacing distance T45 between the image side surface of the fourth lens and the object side surface of the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the spacing distance T56 between the image side surface of the fifth lens and the object side surface of the sixth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.5<T45 / (CT5+T56+CT6)<1.

[0031] In one embodiment, 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 may satisfy: 2.9<CT7 / CT8<4.5.

[0032] In one embodiment, a distance T78 between the image side surface of the seventh lens and the object side surface of the eighth lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis may satisfy: 0.9<T78 / CT8<1.4.

[0033] In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT82 of the image-side surface of the eighth lens may satisfy: 1<DT11 / DT82<1.5.

[0034] In one embodiment, the maximum effective radius DT41 of the object-side surface of the fourth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens may satisfy: 0.6<DT41 / DT52<1.

[0035] In one embodiment, a distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis may satisfy: 0.6<SAG11 / CT1<1.1.

[0036] In one embodiment, an edge thickness ET1 of the first lens and an edge thickness ET8 of the eighth lens may satisfy: 0.8<ET1 / ET8<1.2.

[0037] In one embodiment, the distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis and the distance SAG81 from the intersection of the object side surface of the eighth lens and the optical axis to the vertex of the effective radius of the object side surface of the eighth lens on the optical axis may satisfy: 0.3<SAG72 / SAG81<0.6.

[0038] In one embodiment, a distance SAG71 from an intersection of the object side surface of the seventh lens and the optical axis to a vertex of an effective radius of the object side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.2<SAG71 / CT7<0.5.

[0039] In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens group may satisfy: 2<f4 / f<3.

[0040] In one embodiment, the maximum field of view FOV of the optical imaging lens group may satisfy: tan(FOV / 2)>2.

[0041] The present application provides an optical imaging lens assembly suitable for portable electronic products, with wide angle, miniaturization and good imaging quality, by reasonably allocating optical focal length and optimizing optical parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0043] Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 1 of the present application is shown;

[0044] FIG. 2A to FIG. 2C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 1 are respectively shown;

[0045] Figure 3 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 2 of the present application is shown;

[0046] FIG. 4A to FIG. 4C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 2 are respectively shown;

[0047] Figure 5 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 3 of the present application is shown;

[0048] FIG. 6A to FIG. 6C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 3 are respectively shown;

[0049] Figure 7 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 4 of the present application is shown;

[0050] FIG. 8A to FIG. 8C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 4 are respectively shown;

[0051] Fig. 9 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 5 of the present application is shown;

[0052] FIG. 10A to FIG. 10C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 5 are respectively shown;

[0053] Fig.11 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 6 of the present application is shown; and

[0054] FIG. 12A to FIG. 12C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 6 are respectively shown;

[0055] Fig.13 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 7 of the present application is shown;

[0056] FIG. 14A to FIG. 14C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 7 are respectively shown;

[0057] Fig.15 shows a schematic structural diagram of an optical imaging lens assembly according to Example 8 of the present application; and

[0058] FIG. 16A to FIG. 16C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 8 are respectively shown. DETAILED DESCRIPTION

[0059] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0060] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0061] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0062] In this article, 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 closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0063] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0064] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0065] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0066] The features, principles and other aspects of the present application are described in detail below.

[0067] The optical imaging lens group according to the exemplary embodiment of the present application may include eight lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The eight lenses are arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the eighth lens may have a spacing distance between them.

[0068] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive optical power or negative optical power; the third lens may have positive optical power or negative optical power, and its image side surface may be convex; the fourth lens may have positive optical power; the fifth lens may have positive optical power or negative optical power; the sixth lens may have positive optical power or negative optical power; the seventh lens may have positive optical power or negative optical power, and its image side surface may be convex; and the eighth lens may have negative optical power.

[0069] In example embodiments, the object-side surface of the fourth lens may be a convex surface; and the object-side surface of the seventh lens may be a convex surface.

[0070] In an exemplary embodiment, by reasonably setting the optical power and surface characteristics of the first lens to the eighth lens, it is beneficial for each lens to balance various aberrations such as spherical aberration, coma, chromatic aberration, etc., so as to effectively improve the performance of the optical imaging lens group.

[0071] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 2<f4 / f<3, wherein f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical imaging lens group. More specifically, f4 and f may further satisfy: 2.2<f4 / f<2.6. Satisfying 2<f4 / f<3 can effectively control the total effective focal length of the optical imaging lens group, so that the optical imaging lens group is conducive to increasing the field of view and expanding the imaging range when matching chips of the same size.

[0072] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<f1 / f8<1, where f1 is the effective focal length of the first lens and f8 is the effective focal length of the eighth lens. More specifically, f1 and f8 may further satisfy: 0.6<f1 / f8<0.9. Satisfying 0.5<f1 / f8<1 can effectively balance various aberrations and improve imaging quality, and can also make the first lens and the eighth lens symmetrical to each other.

[0073] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.8<|f7 / f8|<1.3, wherein f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens. More specifically, f7 and f8 may further satisfy: 0.9<|f7 / f8|<1.1. Satisfying 0.8<|f7 / f8|<1.3 can ensure that the absolute values ​​of the optical powers of the seventh lens and the eighth lens are similar, which helps the seventh lens and the eighth lens balance the aberrations and effectively improves the performance of the optical imaging lens group.

[0074] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<10×(R3-R4) / (R3+R4)<1, wherein R3 is the radius of curvature of the object side surface of the second lens, and R4 is the radius of curvature of the image side surface of the second lens. More specifically, R3 and R4 may further satisfy: 0.2<10×(R3-R4) / (R3+R4)<0.6. Satisfying 0<10×(R3-R4) / (R3+R4)<1 can effectively control the effective focal length of the second lens, which is beneficial for the second lens to converge light.

[0075] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<R2 / R16<1.5, wherein R2 is the radius of curvature of the image side surface of the first lens, and R16 is the radius of curvature of the image side surface of the eighth lens. More specifically, R2 and R16 may further satisfy: 0.6<R2 / R16<1.0. Satisfying 0.5<R2 / R16<1.5 can help control the symmetrical structure of the first lens and the eighth lens, and is conducive to balancing aberrations such as coma and chromatic aberration of the optical imaging lens group, thereby improving imaging quality.

[0076] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.9<CT2 / ET2<1.3, wherein CT2 is the center thickness of the second lens on the optical axis, and ET2 is the edge thickness of the second lens. More specifically, CT2 and ET2 may further satisfy: 1.0<CT2 / ET2<1.2. Satisfying 0.9<CT2 / ET2<1.3 is conducive to controlling the uniform thickness of the second lens, which can effectively improve the processability of the second lens, and can also improve the production yield of the entire optical imaging lens assembly.

[0077] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: CT1 / CT2+CT1 / CT3<1, wherein CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. More specifically, CT1, CT2, and CT3 may further satisfy: CT1 / CT2+CT1 / CT3<0.9. Satisfying CT1 / CT2+CT1 / CT3<1 helps control the center thickness of the first lens, the second lens, and the third lens, and is conducive to enhancing the processability of the three lenses.

[0078] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<T45 / (CT5+T56+CT6)<1, wherein T45 is the distance between the image side surface of the fourth lens and the object side surface of the fifth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T56 is the distance between the image side surface of the fifth lens and the object side surface of the sixth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. More specifically, T45, CT5, T56 and CT6 may further satisfy: 0.8<T45 / (CT5+T56+CT6)<1. Satisfying 0.5<T45 / (CT5+T56+CT6)<1 is beneficial to the molding processability of the fifth lens and the sixth lens, and by controlling the spacing between the fourth lens, the fifth lens and the sixth lens, it is beneficial to improve the assembly processability.

[0079] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 2.9<CT7 / CT8<4.5, wherein CT7 is the center thickness of the seventh lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. More specifically, CT7 and CT8 may further satisfy: 2.9<CT7 / CT8<4.2. Satisfying 2.9<CT7 / CT8<4.5 is beneficial to the lens process of the seventh lens and the eighth lens, and can effectively reduce the molding risk of the optical imaging lens assembly.

[0080] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.9<T78 / CT8<1.4, wherein T78 is the distance between the image side surface of the seventh lens and the object side surface of the eighth lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis. Satisfying 0.9<T78 / CT8<1.4 is beneficial to both improving the processability of the eighth lens and balancing aberrations.

[0081] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 1<DT11 / DT82<1.5, wherein DT11 is the maximum effective radius of the object side of the first lens, and DT82 is the maximum effective radius of the image side of the eighth lens. More specifically, DT11 and DT82 may further satisfy: 1.1<DT11 / DT82<1.5. Satisfying 1<DT11 / DT82<1.5 is conducive to forming a symmetrical structure of the optical imaging lens group to effectively balance the aberrations of the optical imaging lens group, thereby facilitating the improvement of imaging quality, and also facilitating the reduction of the size of the optical imaging lens group.

[0082] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.6<DT41 / DT52<1, wherein DT41 is the maximum effective radius of the object side of the fourth lens, and DT52 is the maximum effective radius of the image side of the fifth lens. More specifically, DT41 and DT52 may further satisfy: 0.6<DT41 / DT52<0.8. Satisfying 0.6<DT41 / DT52<1 is conducive to improving the imaging quality of the optical imaging lens group and helping to reduce the size of the optical imaging lens group.

[0083] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.6<SAG11 / CT1<1.1, wherein SAG11 is the distance from the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis. Satisfying 0.6<SAG11 / CT1<1.1 helps to control the height loss SAG11 and center thickness CT1 of the object side surface of the first lens, and can effectively improve the molding processability of the first lens.

[0084] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.8<ET1 / ET8<1.2, wherein ET1 is the edge thickness of the first lens, and ET8 is the edge thickness of the eighth lens. More specifically, ET1 and ET8 may further satisfy: 0.8<ET1 / ET8<1.1. Satisfying 0.8<ET1 / ET8<1.2 helps to improve the processability of the first lens and the eighth lens, and thus helps to improve the production yield of the optical imaging lens assembly.

[0085] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<SAG72 / SAG81<0.6, wherein SAG72 is the distance from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis, and SAG81 is the distance from the intersection of the object side surface of the eighth lens and the optical axis to the vertex of the effective radius of the object side surface of the eighth lens on the optical axis. More specifically, SAG72 and SAG81 may further satisfy: 0.4<SAG72 / SAG81<0.6. Satisfying 0.3<SAG72 / SAG81<0.6 is conducive to controlling the shapes of the seventh lens and the eighth lens so that they can meet the existing processing conditions, thereby helping to improve the production yield of the optical imaging lens group.

[0086] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.2<SAG71 / CT7<0.5, wherein SAG71 is the distance from the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis. Satisfying 0.2<SAG71 / CT7<0.5 is conducive to controlling the shape of the seventh lens and improving the processability of the seventh lens.

[0087] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: tan(FOV / 2)>2, where FOV is the maximum field of view of the optical imaging lens assembly. More specifically, FOV may further satisfy: tan(FOV / 2)>2.1. Satisfying tan(FOV / 2)>2 is conducive to increasing the field of view of the optical imaging lens assembly, making the optical imaging lens assembly have a wide-angle characteristic, and thus making the optical imaging lens assembly produce a stronger perspective effect.

[0088] In an exemplary embodiment, the optical imaging lens group according to the present application further includes an aperture disposed between the third lens and the fourth lens. Optionally, the optical imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0089] The present application proposes an optical imaging lens group with the characteristics of miniaturization, wide angle, large aperture and high imaging quality. The optical imaging lens group according to the above-mentioned embodiment of the present application can use multiple lenses, such as the eight lenses mentioned above. The present application can provide more light input by providing an eight-piece large-aperture ultra-wide-angle optical imaging lens group, which is beneficial for avoiding noise when shooting with an ultra-wide-angle lens in a low-light environment. By reasonably allocating the optical focal length, surface shape, center thickness of each lens, and axial spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the machinability of the imaging lens can be improved, making the optical imaging lens group more conducive to production and processing.

[0090] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the eighth lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all aspherical mirror surfaces.

[0091] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens group can be changed to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical imaging lens group is not limited to including eight lenses. If necessary, the optical imaging lens group may also include other numbers of lenses.

[0092] Specific embodiments of the optical imaging lens assembly applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0093] Example 1

[0094] The following reference Figures 1 to 2C Describe the optical imaging lens group according to Example 1 of the present application. Figure 1 A schematic structural diagram of an optical imaging lens group according to Example 1 of the present application is shown.

[0095] 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0096] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0097] Table 1 shows the basic parameters of the optical imaging lens assembly of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0098]

[0099] Table 1

[0100] In this example, the total effective focal length f of the optical imaging lens group is 1.79 mm, the maximum field of view FOV of the optical imaging lens group is 136.8°, and the aperture value Fno of the optical imaging lens group is 2.00.

[0101] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the eighth lens E8 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0102]

[0103] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26, A 28 and A 30 .

[0104] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.9478E-02 -1.4242E-02 3.9887E-03 -7.0024E-04 7.3964E-05 -4.0628E-06 7.6833E-08 S2 -9.3128E-03 -4.6865E-02 7.1158E-01 -5.0209E+00 2.2473E+01 -6.8041E+01 1.4416E+02 S3 -3.7092E-02 2.8621E-02 -1.4155E-03 -1.3397E-02 1.1501E-02 -4.4412E-03 6.3418E-04 S4 1.9694E-03 4.5633E-02 5.8832E-02 -2.6178E-01 4.3356E-01 -3.3195E-01 9.2670E-02 S5 -1.1845E-02 4.7953E-02 -1.0810E-01 2.1688E-01 -2.5166E-01 1.6528E-01 -5.1984E-02 S6 8.4443E-02 -1.5019E-01 3.6397E-01 -6.3136E-01 6.6671E-01 -3.8273E-01 8.7238E-02 S7 3.7932E-02 -8.0729E-02 -9.3548E-02 2.0270E+00 -9.8486E+00 2.8192E+01 -5.3212E+01 S8 -1.3739E-01 2.0480E-01 -2.5072E+00 3.0194E+01 -2.3463E+02 1.2024E+03 -4.1794E+03 S9 -3.2970E-01 3.9061E-01 -2.2301E+00 1.2037E+01 -4.2446E+01 1.0455E+02 -1.8342E+02 S10 -3.8269E-01 9.2321E-01 -4.5008E+00 1.7510E+01 -4.5128E+01 7.9312E+01 -9.6819E+01 S11 -1.9250E-01 8.0274E-01 -4.0057E+00 1.4871E+01 -3.7545E+01 6.5581E+01 -8.1015E+01 S12 -1.7918E-01 1.7699E-01 7.2470E-03 -4.1359E-01 1.0715E+00 -1.7928E+00 2.0650E+00 S13 -1.1736E-01 7.7508E-02 2.1336E-03 -9.1074E-02 1.3092E-01 -1.1121E-01 6.5035E-02 S14 -9.6973E-03 -7.5806E-02 1.2392E-01 -9.5744E-02 2.8070E-03 5.7226E-02 -5.2792E-02 S15 -3.0251E-01 -1.7786E-01 5.8155E-01 -4.9956E-01 7.0003E-02 2.4597E-01 -2.6037E-01 S16 -2.5068E-01 -2.5635E-01 1.1003E+00 -2.1565E+00 2.9599E+00 -3.0271E+00 2.3258E+00

[0105] Table 2-1

[0106]

[0107]

[0108] Table 2-2

[0109] Figure 2A The axial chromatic aberration curve of the optical imaging lens group of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens group of Example 1 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 2C The magnification chromatic aberration curve of the optical imaging lens set of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2C It can be seen that the optical imaging lens assembly provided in Example 1 can achieve good imaging quality.

[0110] Example 2

[0111] The following reference Figures 3 to 4C The optical imaging lens assembly according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens group according to Example 2 of the present application is shown.

[0112] like Figure 3 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0113] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0114] In this example, the total effective focal length f of the optical imaging lens group is 1.80 mm, the maximum field of view FOV of the optical imaging lens group is 131.6°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0115] Table 3 shows the basic parameters of the optical imaging lens assembly of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0116]

[0117]

[0118] Table 3

[0119] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.4956E-02 -1.0752E-02 2.8352E-03 -4.8043E-04 4.9828E-05 -2.7608E-06 5.7356E-08 S2 -1.5189E-03 -2.1097E-02 2.8343E-01 -1.8094E+00 7.4647E+00 -2.0975E+01 4.1343E+01 S3 -2.7010E-02 1.6824E-02 2.0830E-03 -7.4215E-03 4.6193E-03 -1.5626E-03 2.0613E-04 S4 9.9309E-03 2.3767E-02 7.8915E-02 -2.3445E-01 3.5129E-01 -2.6262E-01 7.2798E-02 S5 -9.6803E-03 2.9728E-02 -5.1661E-02 1.1370E-01 -1.4397E-01 1.0023E-01 -3.2189E-02 S6 8.8846E-02 -1.7514E-01 4.2630E-01 -7.4861E-01 8.2046E-01 -4.8983E-01 1.1623E-01 S7 4.4278E-02 -2.6415E-02 -1.1322E+00 1.0156E+01 -4.8263E+01 1.4539E+02 -2.8857E+02 S8 -1.2395E-01 -4.4918E-03 1.5260E+00 -1.7336E+01 1.1987E+02 -5.5656E+02 1.8050E+03 S9 -3.2240E-01 2.5778E-01 -8.8290E-01 3.3717E+00 -5.2029E+00 -5.6211E+00 4.5637E+01 S10 -3.7959E-01 7.7477E-01 -3.3673E+00 1.2608E+01 -3.1529E+01 5.3970E+01 -6.4401E+01 S11 -1.9276E-01 6.9075E-01 -3.0580E+00 1.0663E+01 -2.5761E+01 4.3129E+01 -5.0804E+01 S12 -1.8923E-01 2.1917E-01 -1.1453E-01 -5.1309E-02 1.8570E-01 -2.9349E-01 3.5008E-01 S13 -1.2886E-01 9.9536E-02 -4.1310E-02 -1.5951E-02 3.3458E-02 -2.1155E-02 6.9826E-03 S14 -2.0476E-02 -4.9695E-02 7.2181E-02 -4.8574E-02 -3.1033E-04 2.2817E-02 -1.5023E-02 S15 -3.7844E-01 7.9889E-02 1.3195E-01 -1.6566E-02 -2.8912E-01 4.5181E-01 -3.6084E-01 S16 -3.5408E-01 1.4690E-01 2.0189E-01 -6.0201E-01 8.7226E-01 -8.7755E-01 6.4961E-01

[0120] Table 4-1

[0121]

[0122]

[0123] Table 4-2

[0124] Figure 4A The axial chromatic aberration curve of the optical imaging lens group of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4B The astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 4CThe magnification chromatic aberration curve of the optical imaging lens set of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4C It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0125] Example 3

[0126] The following reference Figures 5 to 6C An optical imaging lens group according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens group according to Example 3 of the present application is shown.

[0127] like Figure 5 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0128] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0129] In this example, the total effective focal length f of the optical imaging lens group is 1.81 mm, the maximum field of view FOV of the optical imaging lens group is 131.1°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0130] Table 5 shows the basic parameters of the optical imaging lens assembly of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0131]

[0132]

[0133] Table 5

[0134] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.1469E-02 -7.8714E-03 1.6024E-03 -1.7858E-04 6.6928E-06 6.0739E-07 -5.3947E-08 S2 -6.5908E-04 2.0038E-03 -7.8345E-03 3.1130E-01 -2.1946E+00 8.6064E+00 -2.1889E+01 S3 -2.6029E-02 1.8863E-02 -4.0429E-03 4.0699E-03 -4.5927E-03 1.6539E-03 -2.0749E-04 S4 8.3071E-03 3.5761E-02 1.5238E-02 -4.5043E-02 6.3635E-02 -5.4905E-02 1.5974E-02 S5 -1.0209E-02 1.9538E-02 -1.3557E-02 2.2234E-02 -2.4958E-02 1.8181E-02 -7.2167E-03 S6 9.2482E-02 -2.1612E-01 5.7180E-01 -1.0656E+00 1.2243E+00 -7.5368E-01 1.8356E-01 S7 5.5027E-02 -1.4420E-01 -1.4060E-01 3.9310E+00 -2.1359E+01 6.6071E+01 -1.3002E+02 S8 -1.1852E-01 2.1212E-02 7.9779E-01 -8.6617E+00 5.4611E+01 -2.2722E+02 6.5608E+02 S9 -3.1216E-01 2.1880E-01 -7.6261E-01 3.4587E+00 -8.6537E+00 1.3064E+01 -9.7238E+00 S10 -3.9834E-01 7.7834E-01 -2.7110E+00 8.3762E+00 -1.7460E+01 2.4583E+01 -2.3444E+01 S11 -2.3778E-01 7.7782E-01 -2.5355E+00 6.4205E+00 -1.1004E+01 1.1356E+01 -4.5137E+00 S12 -2.1247E-01 3.0827E-01 -3.2209E-01 3.7374E-01 -6.6131E-01 1.1278E+00 -1.4171E+00 S13 -1.4473E-01 1.4383E-01 -1.0909E-01 4.7134E-02 5.2233E-04 -1.7810E-02 1.5485E-02 S14 -3.2463E-02 -2.0699E-02 5.6522E-02 -9.0740E-02 9.9387E-02 -8.3674E-02 5.4492E-02 S15 -4.6171E-01 2.2378E-01 1.0031E-01 -3.1589E-01 3.0975E-01 -1.6736E-01 4.8466E-02 S16 -4.5562E-01 3.6253E-01 -6.5881E-02 -4.3212E-01 9.0385E-01 -1.0663E+00 8.6094E-01

[0135] Table 6-1

[0136]

[0137]

[0138] Table 6-2

[0139] Fig. 6A The axial chromatic aberration curve of the optical imaging lens group of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens group of Example 3 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 6C The magnification chromatic aberration curve of the optical imaging lens set of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6C It can be seen that the optical imaging lens assembly provided in Example 3 can achieve good imaging quality.

[0140] Example 4

[0141] The following reference Figures 7 to 8C An optical imaging lens group according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens group according to Example 4 of the present application is shown.

[0142] 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0143] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0144] In this example, the total effective focal length f of the optical imaging lens group is 1.74 mm, the maximum field of view FOV of the optical imaging lens group is 138.0°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0145] Table 7 shows the basic parameters of the optical imaging lens assembly of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0146]

[0147] Table 7

[0148] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.3569E-02 -8.0350E-03 1.4519E-03 -1.2316E-04 -1.1957E-06 1.0887E-06 -6.3007E-08 S2 -1.8388E-03 -9.9866E-03 -5.4981E-02 1.5671E+00 -1.0699E+01 4.0767E+01 -1.0027E+02 S3 -2.4742E-02 1.5653E-02 2.8500E-03 -3.8907E-03 2.0182E-04 2.6403E-04 -5.1817E-05 S4 1.4526E-02 2.7532E-02 3.9805E-02 -9.4704E-02 1.1251E-01 -7.6872E-02 1.9199E-02 S5 -8.2038E-03 1.4514E-02 -6.4771E-04 -1.0152E-02 1.7070E-02 -8.6410E-03 0.0000E+00 S6 8.1279E-02 -1.8864E-01 4.6662E-01 -7.8886E-01 8.1028E-01 -4.4321E-01 9.6093E-02 S7 4.3678E-02 -6.0510E-02 -7.8561E-01 7.2025E+00 -3.1997E+01 8.8260E+01 -1.5892E+02 S8 -1.1430E-01 -6.3993E-03 1.2900E+00 -1.4090E+01 9.2842E+01 -4.0906E+02 1.2581E+03 S9 -3.0763E-01 1.7575E-01 -5.7624E-01 3.2035E+00 -1.0277E+01 2.4422E+01 -4.5658E+01 S10 -4.0109E-01 7.3454E-01 -2.1745E+00 5.4749E+00 -7.9075E+00 3.8122E+00 7.1549E+00 S11 -2.5688E-01 8.4002E-01 -2.4815E+00 5.2763E+00 -6.4875E+00 1.2235E+00 1.0254E+01 S12 -2.4488E-01 4.2774E-01 -6.1333E-01 9.4118E-01 -1.6281E+00 2.5557E+00 -3.1040E+00 S13 -1.6908E-01 2.1690E-01 -2.3645E-01 1.8939E-01 -1.0119E-01 2.3751E-02 1.1428E-02 S14 -4.3736E-02 2.3821E-02 -5.0761E-03 -5.6086E-02 1.0951E-01 -1.1531E-01 8.0315E-02 S15 -5.4043E-01 3.7081E-01 2.4346E-03 -4.7604E-01 7.5929E-01 -6.8417E-01 4.0663E-01 S16 -5.3726E-01 5.5226E-01 -3.6790E-01 -9.5780E-02 6.3223E-01 -9.0427E-01 7.9054E-01

[0149] Table 8-1

[0150] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.6829E+02 -1.9704E+02 1.6113E+02 -9.0311E+01 3.3082E+01 -7.1377E+00 6.8817E-01 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.8654E+02 -1.3726E+02 5.7317E+01 -1.0337E+01 0.0000E+00 0.0000E+00 0.0000E+00 S8 -2.7451E+03 4.2379E+03 -4.5266E+03 3.1805E+03 -1.3213E+03 2.4560E+02 0.0000E+00 S9 6.5602E+01 -6.9412E+01 5.1464E+01 -2.5019E+01 7.1098E+00 -8.9077E-01 0.0000E+00 S10 -1.5808E+01 1.4623E+01 -7.4957E+00 2.0765E+00 -2.4349E-01 0.0000E+00 0.0000E+00 S11 -1.9220E+01 1.8399E+01 -1.0793E+01 3.9174E+00 -8.1191E-01 7.3753E-02 0.0000E+00 S12 2.7016E+00 -1.5943E+00 5.9909E-01 -1.2863E-01 1.1978E-02 0.0000E+00 0.0000E+00 S13 -1.3136E-02 5.7084E-03 -1.3579E-03 1.7337E-04 -9.3015E-06 0.0000E+00 0.0000E+00 S14 -3.8369E-02 1.2358E-02 -2.5438E-03 2.9991E-04 -1.5321E-05 0.0000E+00 0.0000E+00 S15 -1.6045E-01 3.6099E-02 -2.7044E-04 -2.6764E-03 8.5357E-04 -1.2085E-04 6.8226E-06 S16 -4.7585E-01 2.0313E-01 -6.1468E-02 1.2898E-02 -1.7847E-03 1.4640E-04 -5.3909E-06

[0151] Table 8-2

[0152] Fig. 8A The axial chromatic aberration curve of the optical imaging lens group of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens group of Example 4 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 8C The magnification chromatic aberration curve of the optical imaging lens set of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8C It can be seen that the optical imaging lens group provided in Example 4 can achieve good imaging quality.

[0153] Example 5

[0154] The following reference Figures 9 to 10C An optical imaging lens group according to Example 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens group according to Example 5 of the present application is shown.

[0155] like Fig. 9 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0156] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0157] In this example, the total effective focal length f of the optical imaging lens group is 1.72 mm, the maximum field of view FOV of the optical imaging lens group is 143.6°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0158] Table 9 shows the basic parameters of the optical imaging lens assembly of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0159]

[0160] Table 9

[0161]

[0162]

[0163] Table 10-1

[0164] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.9111E+02 -2.2122E+02 1.7804E+02 -9.7904E+01 3.5111E+01 -7.4043E+00 6.9681E-01 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.1619E+02 -8.5123E+01 3.5353E+01 -6.3315E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -1.3268E+03 1.7958E+03 -1.7450E+03 1.1613E+03 -4.7448E+02 8.9411E+01 0.0000E+00 S9 1.8084E+02 -1.9508E+02 1.4524E+02 -7.0497E+01 1.9998E+01 -2.5082E+00 0.0000E+00 S10 -1.5356E+01 1.4885E+01 -7.7448E+00 2.1543E+00 -2.5239E-01 0.0000E+00 0.0000E+00 S11 -2.1756E+01 2.0775E+01 -1.2130E+01 4.3736E+00 -8.9903E-01 8.0877E-02 0.0000E+00 S12 2.5954E+00 -1.5326E+00 5.7599E-01 -1.2359E-01 1.1492E-02 0.0000E+00 0.0000E+00 S13 -6.0576E-03 3.9396E-03 -1.0830E-03 1.4986E-04 -8.4911E-06 0.0000E+00 0.0000E+00 S14 -1.8763E-02 6.9588E-03 -1.6089E-03 2.0784E-04 -1.1407E-05 0.0000E+00 0.0000E+00 S15 -3.3495E-02 -4.0011E-03 7.2120E-03 -3.2085E-03 7.7601E-04 -1.0145E-04 5.6017E-06 S16 -5.7004E-01 2.3924E-01 -7.1470E-02 1.4830E-02 -2.0301E-03 1.6475E-04 -5.9989E-06

[0165] Table 10-2

[0166] Fig. 10A The axial chromatic aberration curve of the optical imaging lens group of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens group of Example 5 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 10C The magnification chromatic aberration curve of the optical imaging lens set of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10C It can be seen that the optical imaging lens group provided in Example 5 can achieve good imaging quality.

[0167] Example 6

[0168] The following reference Figures 11 to 12C An optical imaging lens group according to Example 6 of the present application is described. Fig.11 A schematic structural diagram of an optical imaging lens group according to Example 6 of the present application is shown.

[0169] like Fig.11 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

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

[0171] In this example, the total effective focal length f of the optical imaging lens group is 1.70 mm, the maximum field of view FOV of the optical imaging lens group is 148.3°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0172] Table 11 shows the basic parameters of the optical imaging lens assembly of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0173]

[0174] Table 11

[0175]

[0176]

[0177] Table 12-1

[0178] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.4393E+02 -2.6239E+02 1.9864E+02 -1.0359E+02 3.5437E+01 -7.1585E+00 6.4739E-01 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.5905E+02 -2.6202E+02 1.0832E+02 -1.9283E+01 0.0000E+00 0.0000E+00 0.0000E+00 S8 6.4310E+03 -1.1432E+04 1.3675E+04 -1.0533E+04 4.7181E+03 -9.3371E+02 0.0000E+00 S9 9.7650E+01 -9.5627E+01 6.5447E+01 -2.9364E+01 7.6911E+00 -8.8419E-01 0.0000E+00 S10 5.3557E+00 2.6189E+00 -3.0437E+00 1.1015E+00 -1.4775E-01 0.0000E+00 0.0000E+00 S11 4.3003E+00 3.3103E+00 -3.9905E+00 1.8656E+00 -4.3961E-01 4.3006E-02 0.0000E+00 S12 2.9801E+00 -1.7712E+00 6.7309E-01 -1.4613E-01 1.3736E-02 0.0000E+00 0.0000E+00 S13 2.4797E-02 -3.6997E-03 1.4373E-04 3.5129E-05 -3.7631E-06 0.0000E+00 0.0000E+00 S14 -2.2201E-02 7.2818E-03 -1.5528E-03 1.9070E-04 -1.0132E-05 0.0000E+00 0.0000E+00 S15 -8.0173E-03 -1.8051E-02 1.0769E-02 -3.5201E-03 7.2682E-04 -8.7790E-05 4.6873E-06 S16 -6.2944E-01 2.6043E-01 -7.6772E-02 1.5726E-02 -2.1257E-03 1.7033E-04 -6.1242E-06

[0179] Table 12-2

[0180] Fig. 12A The axial chromatic aberration curve of the optical imaging lens group of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 12B The astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 12C The magnification chromatic aberration curve of the optical imaging lens set of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12C It can be seen that the optical imaging lens group provided in Example 6 can achieve good imaging quality.

[0181] Example 7

[0182] The following reference Figures 13 to 14C An optical imaging lens group according to Example 7 of the present application is described. Fig.13 A schematic structural diagram of an optical imaging lens group according to Example 7 of the present application is shown.

[0183] like Fig.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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0184] The first lens E1 has negative focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0185] In this example, the total effective focal length f of the optical imaging lens group is 1.71 mm, the maximum field of view FOV of the optical imaging lens group is 149.2°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0186] Table 13 shows the basic parameters of the optical imaging lens assembly of Example 7, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0187]

[0188] Table 13

[0189] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.3670E-02 -7.7627E-03 1.3045E-03 -9.2679E-05 -4.3355E-06 1.1881E-06 -5.8198E-08 S2 -5.7090E-03 5.6922E-02 -7.0391E-01 5.0414E+00 -2.1899E+01 6.2739E+01 -1.2398E+02 S3 -2.0921E-02 1.2465E-02 3.9165E-03 -5.8280E-03 2.4830E-03 -6.6948E-04 8.0194E-05 S4 1.9363E-02 2.1002E-02 3.1897E-02 -8.0728E-02 1.0055E-01 -6.8006E-02 1.6617E-02 S5 -4.0837E-03 1.1619E-02 -1.1764E-02 1.9466E-02 -1.6663E-02 9.3364E-03 -3.2209E-03 S6 5.4478E-02 -1.2828E-01 3.3329E-01 -5.6213E-01 5.6333E-01 -2.9632E-01 6.1258E-02 S7 1.8288E-02 7.3216E-02 -1.6580E+00 1.1675E+01 -4.7606E+01 1.2442E+02 -2.1387E+02 S8 -1.0356E-01 5.5373E-02 -4.3622E-01 7.9550E+00 -7.6948E+01 4.4553E+02 -1.6723E+03 S9 -2.9497E-01 2.0323E-01 -7.9290E-01 4.0007E+00 -1.2092E+01 2.5824E+01 -4.1113E+01 S10 -4.0333E-01 9.1592E-01 -3.4813E+00 1.0960E+01 -2.3004E+01 3.2101E+01 -2.9696E+01 S11 -2.6666E-01 1.0188E+00 -3.8158E+00 1.1009E+01 -2.2434E+01 3.1730E+01 -3.1187E+01 S12 -2.6016E-01 4.9828E-01 -7.8075E-01 1.1261E+00 -1.5442E+00 1.9232E+00 -2.0413E+00 S13 -1.8564E-01 2.9931E-01 -4.1134E-01 4.4325E-01 -3.6944E-01 2.2983E-01 -1.0218E-01 S14 -6.1139E-02 6.9766E-02 -7.7293E-02 3.9886E-02 1.0530E-03 -1.8599E-02 1.6546E-02 S15 -5.2396E-01 3.3649E-01 2.8534E-05 -3.4099E-01 4.4016E-01 -2.7293E-01 7.3860E-02 S16 -5.0078E-01 4.7886E-01 -2.7506E-01 -1.7011E-01 6.4909E-01 -8.6205E-01 7.2462E-01

[0190] Table 14-1

[0191] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.7299E+02 -1.7188E+02 1.2090E+02 -5.8827E+01 1.8837E+01 -3.5711E+00 3.0373E-01 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 2.3986E+02 -1.6834E+02 6.6863E+01 -1.1421E+01 0.0000E+00 0.0000E+00 0.0000E+00 S8 4.2286E+03 -7.2833E+03 8.4341E+03 -6.2850E+03 2.7226E+03 -5.2089E+02 0.0000E+00 S9 4.8859E+01 -4.2435E+01 2.5862E+01 -1.0328E+01 2.3858E+00 -2.3647E-01 0.0000E+00 S10 1.7669E+01 -6.2046E+00 9.6174E-01 5.8737E-02 -2.9219E-02 0.0000E+00 0.0000E+00 S11 2.1246E+01 -9.8576E+00 2.9820E+00 -5.3461E-01 4.4691E-02 -4.5271E-04 0.0000E+00 S12 1.6890E+00 -9.8750E-01 3.7203E-01 -8.0016E-02 7.4274E-03 0.0000E+00 0.0000E+00 S13 3.1058E-02 -6.0960E-03 6.9900E-04 -3.6874E-05 2.4199E-07 0.0000E+00 0.0000E+00 S14 -8.6839E-03 3.0003E-03 -6.5746E-04 8.1698E-05 -4.3453E-06 0.0000E+00 0.0000E+00 S15 1.2302E-02 -1.8772E-02 8.1446E-03 -2.1488E-03 3.7531E-04 -4.0304E-05 1.9977E-06 S16 -4.2277E-01 1.7513E-01 -5.1347E-02 1.0414E-02 -1.3889E-03 1.0953E-04 -3.8671E-06

[0192] Table 14-2

[0193] Fig.14A The axial chromatic aberration curve of the optical imaging lens group of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 14B The astigmatism curve of the optical imaging lens group of Example 7 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 14C The magnification chromatic aberration curve of the optical imaging lens set of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 14A to FIG. 14CIt can be seen that the optical imaging lens group provided in Example 7 can achieve good imaging quality.

[0194] Example 8

[0195] The following reference Figures 15 to 16C An optical imaging lens group according to Example 8 of the present application is described. Fig.15 A schematic structural diagram of an optical imaging lens group according to Example 8 of the present application is shown.

[0196] like Fig.15 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, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0197] The first lens E1 has negative focal power, and its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive focal power, and its object side surface S13 is convex, and its image side surface S14 is convex. The eighth lens E8 has negative focal power, and its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface S19.

[0198] In this example, the total effective focal length f of the optical imaging lens group is 1.69 mm, the maximum field of view FOV of the optical imaging lens group is 158.2°, and the aperture value Fno of the optical imaging lens group is 2.08.

[0199] Table 15 shows the basic parameters of the optical imaging lens assembly of Example 8, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 16-1 and 16-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 8, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0200]

[0201]

[0202] Table 15

[0203] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.7031E-02 -1.0441E-02 2.4441E-03 -3.7649E-04 3.7512E-05 -2.2138E-06 5.9391E-08 S2 -2.0507E-03 2.6244E-02 -3.4256E-01 2.5715E+00 -1.1344E+01 3.2557E+01 -6.3990E+01 S3 -1.9872E-02 1.3848E-02 1.3721E-03 -4.0687E-03 1.8690E-03 -5.5275E-04 7.0377E-05 S4 2.1365E-02 2.0549E-02 3.1831E-02 -8.4721E-02 9.9890E-02 -6.1249E-02 1.3273E-02 S5 -2.0739E-03 9.7080E-03 -7.2673E-03 4.3206E-03 4.3931E-03 -3.4825E-03 -2.3999E-04 S6 4.5382E-02 -1.0936E-01 2.9885E-01 -5.1923E-01 5.3194E-01 -2.8375E-01 5.9084E-02 S7 1.1677E-02 7.8822E-02 -1.5644E+00 1.0911E+01 -4.4372E+01 1.1566E+02 -1.9815E+02 S8 -1.0485E-01 1.6482E-01 -2.4552E+00 2.8547E+01 -2.0781E+02 9.9638E+02 -3.2588E+03 S9 -2.9820E-01 2.3599E-01 -1.0420E+00 5.3395E+00 -1.7044E+01 3.8606E+01 -6.4327E+01 S10 -3.9620E-01 8.2219E-01 -2.8883E+00 8.7244E+00 -1.7576E+01 2.3364E+01 -2.0288E+01 S11 -2.5236E-01 8.6082E-01 -2.8896E+00 7.5915E+00 -1.4090E+01 1.7772E+01 -1.4851E+01 S12 -2.7719E-01 5.5802E-01 -8.8424E-01 1.2648E+00 -1.8188E+00 2.4779E+00 -2.7977E+00 S13 -2.0467E-01 3.7505E-01 -5.5245E-01 6.1073E-01 -5.0895E-01 3.1512E-01 -1.4095E-01 S14 -7.1786E-02 8.1208E-02 -9.3587E-02 7.6227E-02 -6.3568E-02 5.5904E-02 -3.8666E-02 S15 -4.7152E-01 2.5882E-01 2.2056E-02 -2.2643E-01 1.8914E-01 1.9223E-02 -1.4497E-01 S16 -4.2817E-01 3.5284E-01 -1.1216E-01 -3.4034E-01 7.9090E-01 -9.5285E-01 7.6683E-01

[0204] Table 16-1

[0205] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 8.8437E+01 -8.6787E+01 6.0174E+01 -2.8821E+01 9.0746E+00 -1.6903E+00 1.4116E-01 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 2.2127E+02 -1.5448E+02 6.0967E+01 -1.0334E+01 0.0000E+00 0.0000E+00 0.0000E+00 S8 7.3967E+03 -1.1653E+04 1.2503E+04 -8.7143E+03 3.5559E+03 -6.4447E+02 0.0000E+00 S9 7.8355E+01 -6.8185E+01 4.0781E+01 -1.5707E+01 3.4450E+00 -3.1800E-01 0.0000E+00 S10 1.0937E+01 -3.0925E+00 9.1618E-02 1.8576E-01 -3.5650E-02 0.0000E+00 0.0000E+00 S11 7.7472E+00 -2.0221E+00 -1.4123E-01 2.7795E-01 -7.9191E-02 7.9009E-03 0.0000E+00 S12 2.3486E+00 -1.3547E+00 4.9882E-01 -1.0480E-01 9.5239E-03 0.0000E+00 0.0000E+00 S13 4.3998E-02 -9.1596E-03 1.1829E-03 -8.2335E-05 2.1525E-06 0.0000E+00 0.0000E+00 S14 1.7796E-02 -5.1457E-03 8.8938E-04 -8.2787E-05 3.1129E-06 0.0000E+00 0.0000E+00 S15 1.1933E-01 -5.1306E-02 1.3176E-02 -2.0396E-03 1.8102E-04 -8.4278E-06 1.9668E-07 S16 -4.3546E-01 1.7667E-01 -5.0862E-02 1.0137E-02 -1.3288E-03 1.0295E-04 -3.5686E-06

[0206] Table 16-2

[0207] Fig.16A The axial chromatic aberration curve of the optical imaging lens group of Example 8 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 16B The astigmatism curve of the optical imaging lens group of Example 8 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 16C The magnification chromatic aberration curve of the optical imaging lens set of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 16A to FIG. 16C It can be seen that the optical imaging lens group provided in Example 8 can achieve good imaging quality.

[0208] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0209] Conditional formula\Example 1 2 3 4 5 6 7 8 f4 / f 2.53 2.45 2.35 2.34 2.36 2.29 2.28 2.27 f1 / f8 0.67 0.73 0.78 0.76 0.74 0.74 0.75 0.72 tan(FOV / 2) 2.52 2.23 2.20 2.61 3.04 3.52 3.63 5.19 |f7 / f8| 0.95 0.99 1.03 1.01 1.00 0.99 0.98 0.95 10×(R3-R4) / (R3+R4) 0.53 0.51 0.59 0.52 0.41 0.39 0.40 0.30 R2 / R16 0.66 0.74 0.82 0.87 0.85 0.85 0.90 0.84 CT2 / ET2 1.07 1.09 1.09 1.09 1.09 1.10 1.10 1.11 CT1 / CT2+CT1 / CT3 0.54 0.69 0.88 0.63 0.52 0.57 0.52 0.53 T45 / (CT5+T56+CT6) 0.96 0.95 0.94 0.92 0.88 0.87 0.88 0.85 CT7 / CT8 3.52 3.62 3.86 4.09 3.81 3.53 3.57 3.00 T78 / CT8 1.16 1.20 1.28 1.34 1.24 1.15 1.16 0.97 DT11 / DT82 1.23 1.19 1.23 1.30 1.32 1.36 1.35 1.38 DT41 / DT52 0.73 0.69 0.69 0.67 0.70 0.70 0.70 0.70 SAG11 / CT1 1.06 0.76 0.63 0.85 0.97 0.86 0.83 0.70 ET1 / ET8 0.98 0.91 0.97 0.96 0.96 0.96 0.96 0.95 SAG72 / SAG81 0.58 0.54 0.53 0.48 0.48 0.47 0.47 0.46 SAG71 / CT7 0.47 0.41 0.38 0.34 0.33 0.32 0.33 0.33

[0210] Table 17

[0211] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens group described above.

[0212] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens assembly, characterized in that: Along the optical axis from the object side to the image side, they include: A first lens having negative optical power, whose image side surface is concave; a second lens having optical power, wherein the object side surface is convex and the image side surface is concave; The third lens has positive power, its object side surface is concave and its image side surface is convex; a fourth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; A fifth lens having negative optical power, whose object side surface is convex and image side surface is concave; a sixth lens having positive refractive power and a convex object-side surface; a seventh lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; and An eighth lens having negative optical power, whose object side surface is convex and image side surface is concave; Wherein, the number of lenses having optical power in the optical imaging lens group is eight; 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: 3.00≤CT7 / CT8≤4.09; and The spacing distance T45 between the image side surface of the fourth lens and the object side surface of the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the spacing distance T56 between the image side surface of the fifth lens and the object side surface of the sixth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 0.85≤T45 / (CT5+T56+CT6)<1.

2. The optical imaging lens assembly according to claim 1, characterized in that: The effective focal length f1 of the first lens and the effective focal length f8 of the eighth lens satisfy: 0.67≤f1 / f8≤0.

78.

3. The optical imaging lens assembly according to claim 1, characterized in that: The effective focal length f7 of the seventh lens and the effective focal length f8 of the eighth lens satisfy: 0.95≤|f7 / f8|≤1.

03.

4. The optical imaging lens assembly according to claim 1, characterized in that: A curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens satisfy: 0.30≤10×(R3-R4) / (R3+R4)≤0.

59.

5. The optical imaging lens assembly according to claim 1, characterized in that: A curvature radius R2 of the image side surface of the first lens and a curvature radius R16 of the image side surface of the eighth lens satisfy: 0.66≤R2 / R16≤0.

90.

6. The optical imaging lens assembly according to claim 1, characterized in that: A center thickness CT2 of the second lens on the optical axis and an edge thickness ET2 of the second lens satisfy: 1.07≤CT2 / ET2≤1.

11.

7. The optical imaging lens assembly according to claim 1, characterized in that: A center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis satisfy: 0.52≤CT1 / CT2+CT1 / CT3≤0.

88.

8. The optical imaging lens assembly according to claim 1, characterized in that: A distance T78 between the image side surface of the seventh lens and the object side surface of the eighth lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 0.97≤T78 / CT8≤1.

34.

9. The optical imaging lens assembly according to claim 1, characterized in that: The maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT82 of the image-side surface of the eighth lens satisfy: 1.19≤DT11 / DT82≤1.

38.

10. The optical imaging lens assembly according to claim 1, characterized in that: The maximum effective radius DT41 of the object-side surface of the fourth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy: 0.67≤DT41 / DT52≤0.

73.

11. The optical imaging lens assembly according to claim 1, characterized in that: A distance SAG11 from an intersection of the object side surface of the first lens and the optical axis to an effective radius vertex of the object side surface of the first lens on the optical axis and a center thickness CT1 of the first lens on the optical axis satisfy: 0.6<SAG11 / CT1<1.

1.

12. The optical imaging lens assembly according to claim 1, characterized in that: An edge thickness ET1 of the first lens and an edge thickness ET8 of the eighth lens satisfy: 0.91≤ET1 / ET8≤0.

98.

13. The optical imaging lens assembly according to claim 1, characterized in that: The distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens on the optical axis and the distance SAG81 from the intersection of the object side surface of the eighth lens and the optical axis to the vertex of the effective radius of the object side surface of the eighth lens on the optical axis satisfy: 0.46≤SAG72 / SAG81<0.

6.

14. The optical imaging lens assembly according to claim 1, characterized in that: A distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 0.32≤SAG71 / CT7<0.

5.

15. The optical imaging lens assembly according to claim 14, characterized in that: The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens group satisfy: 2.27≤f4 / f≤2.

53.

16. The optical imaging lens assembly according to any one of claims 1 to 15, characterized in that: The maximum field of view FOV of the optical imaging lens group satisfies: 2.20≤tan(FOV / 2)≤5.19.

Images