Optical imaging lens group

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 optical focal power; a second lens with optical focal power; a third lens with optical focal power; a fourth lens with optical focal power; a fifth lens with negative optical focal power, the object side surface of which is concave; a sixth lens with optical focal power, the image side surface of which is convex; and a seventh lens with optical focal power. Half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH satisfies: ImgH>5.5mm. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH satisfy: TTL / ImgH<1.35.

Description

Technical Field

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

[0002] With the rapid growth of smartphones and other portable electronic products in recent years, major smartphone and other portable electronic product manufacturers have put forward new requirements for lenses for smartphones and other portable electronic products. The imaging lenses for smartphones and other portable electronic products are increasingly pursuing high image quality, which poses greater challenges to optical system design.

[0003] The photosensitive devices in the lenses of portable electronic products such as smartphones are typically either charge-coupled devices (CCDs) or complementary metal-oxide semiconductor sensors (CMOS sensors). Due to the continuous advancement of semiconductor manufacturing technology, the corresponding imaging lenses must also meet high image quality requirements. Therefore, camera lenses with excellent image quality have always been a hot selling point for manufacturers of portable electronic products such as smartphones. Summary of the Invention

[0004] On one 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 optical focal power; a second lens with optical focal power; a third lens with optical focal power; a fourth lens with optical focal power; a fifth lens with negative optical focal power, the object side surface of which is concave; a sixth lens with optical focal power, the image side surface of which is convex; and a seventh lens with optical focal power. Half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH may satisfy: ImgH>5.5mm. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH may satisfy: TTL / ImgH<1.35.

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

[0006] In one embodiment, the total effective focal length f of the optical imaging lens assembly and the entrance pupil diameter EPD of the optical imaging lens assembly may satisfy: f / EPD<1.9.

[0007] In one embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens may satisfy: 0.7<f2 / f5<1.7.

[0008] In one embodiment, a distance T45 between the fourth lens and the fifth lens on the optical axis, a distance T56 between the fifth lens and the sixth lens on the optical axis, and a distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy: 0.2<(T45+T56) / T67<0.7.

[0009] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens assembly may satisfy the relationship: 0.5<f1 / f<1.0.

[0010] In one embodiment, the total effective focal length f of the optical imaging lens group, half of the maximum field of view Semi-FOV of the optical imaging lens group, and the combined focal length f56 of the fifth lens and the sixth lens may satisfy: 0.3<f×tan(Semi-FOV) / f56<0.8.

[0011] In one embodiment, the effective focal length f6 of the sixth lens and the combined focal length f1234 of the first lens, the second lens, the third lens, and the fourth lens may satisfy: 0.5<f6 / f1234<1.0.

[0012] In one embodiment, the distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens on the optical axis and 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 may satisfy: 0.3<SAG62 / SAG72<0.8.

[0013] In one embodiment, the 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 the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis may satisfy: -1.0<SAG52 / SAG11<-0.5.

[0014] In one embodiment, an edge thickness ET2 of the second lens and an edge thickness ET6 of the sixth lens may satisfy: 0.5<ET2 / ET6<1.5.

[0015] In one embodiment, the second lens has negative optical power, its image side surface is concave, and the curvature radius R4 of the image side surface of the second lens and the total effective focal length f of the optical imaging lens group can satisfy: 0.5<R4 / f<1.5.

[0016] In one embodiment, the seventh lens element has negative optical power, its object-side surface is concave, its image-side surface is concave, and the curvature radius R13 of the object-side surface of the seventh lens element, the curvature radius R14 of the image-side surface of the seventh lens element, and the effective focal length f7 of the seventh lens element may satisfy: -1.0<f7 / (R13+R14)<0.

[0017] In one embodiment, the first lens has positive optical power, its object-side surface is convex, its image-side surface is concave, and the curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens can satisfy: 0.5<(R2-R1) / (R1+R2)<1.0.

[0018] In one embodiment, a curvature radius R8 of the image-side surface of the fourth lens and a curvature radius R9 of the object-side surface of the fifth lens may satisfy: 0.2<(R8-R9) / (R8+R9)<1.2.

[0019] In one embodiment, the sixth lens has positive refractive power, its object-side surface is convex, and a curvature radius R11 of the object-side surface of the sixth lens and a curvature radius R12 of the image-side surface of the sixth lens may satisfy: -1.3<R12 / R11<-0.3.

[0020] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5<(CT3+CT4+CT5) / (CT1+CT2)<1.0.

[0021] In one embodiment, the image-side surface of the fourth lens element may be a convex surface.

[0022] 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 having optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having negative optical power, whose object-side surface is concave; a sixth lens having optical power, whose image-side surface is convex; and a seventh lens having optical power. The total effective focal length f of the optical imaging lens group, half of the maximum field of view Semi-FOV of the optical imaging lens group, and the combined focal length f56 of the fifth lens and the sixth lens can satisfy the following: 0.3<f×tan(Semi-FOV) / f56<0.8. The distance TTL from the object-side surface of the first lens to the imaging plane of the optical imaging lens group on the optical axis and half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens group ImgH can satisfy the following: TTL / ImgH<1.35.

[0023] The present application uses multiple (for example, seven) lenses, and by reasonably allocating the optical focal length, surface shape, center thickness of each lens, and on-axis spacing between each lens, the above-mentioned optical imaging system has at least one beneficial effect such as a large image surface and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

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

[0026] Figures 2A to 2D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens assembly of Example 1 are respectively shown;

[0027] Figure 3 1 shows a schematic structural diagram of an optical imaging lens assembly according to Example 2 of the present application;

[0028] Figures 4A to 4D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens assembly of Example 2 are respectively shown;

[0029] Figure 5 1 shows a schematic structural diagram of an optical imaging lens assembly according to Example 3 of the present application;

[0030] 6A to 6D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens assembly of Example 3 are respectively shown;

[0031] Figure 7 1 shows a schematic structural diagram of an optical imaging lens assembly according to Example 4 of the present application;

[0032] Figures 8A to 8D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens assembly of Example 4 are respectively shown;

[0033] Figure 9 1 shows a schematic structural diagram of an optical imaging lens assembly according to Example 5 of the present application;

[0034] 10A to 10D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens assembly of Example 5 are respectively shown;

[0035] Figure 11 shows a schematic structural diagram of an optical imaging lens assembly according to Example 6 of the present application; and

[0036] 12A to 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the optical imaging lens group of Example 6 are respectively shown. DETAILED DESCRIPTION

[0037] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] 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.

[0039] 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.

[0040] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0041] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0043] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] The features, principles and other aspects of the present application are described in detail below.

[0045] The optical imaging lens assembly according to an exemplary embodiment of the present application may include seven lenses having optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first through seventh lenses may be spaced apart by a distance.

[0046] In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive or negative optical power; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power; the fifth lens may have negative optical power, and its object-side surface may be concave; the sixth lens may have positive or negative optical power, and its image-side surface may be convex; and the seventh lens may have positive or negative optical power.

[0047] By rationally controlling the distribution of the optical power of each lens in the optical imaging lens group, the low-order aberrations of the system can be effectively balanced and the tolerance sensitivity of the system can be effectively reduced.

[0048] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following relationship: TTL / ImgH < 1.35, where TTL is the distance on the optical axis from the object-side surface of the first lens element to the imaging plane of the optical imaging lens assembly, and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens assembly. More specifically, TTL and ImgH may further satisfy the following relationship: TTL / ImgH < 1.31. Meeting TTL / ImgH < 1.35 facilitates system miniaturization.

[0049] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following requirements: ImgH > 5.5 mm, where ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens assembly. More specifically, ImgH may further satisfy the following requirements: ImgH > 5.7 mm. Meeting ImgH > 5.5 mm enables the optical system to have high pixel counts, effectively improving system resolution.

[0050] In an exemplary embodiment, the optical imaging lens assembly according to the present application can satisfy the following relationship: f / EPD < 1.9, where f is the total effective focal length of the optical imaging lens assembly and EPD is the entrance pupil diameter of the optical imaging lens assembly. Meeting f / EPD < 1.9 can increase the light throughput of the system and enhance imaging performance in dark environments.

[0051] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following: 0.7 < f2 / f5 < 1.7, where f2 is the effective focal length of the second lens element and f5 is the effective focal length of the fifth lens element. More specifically, f2 and f5 may further satisfy the following: 0.7 < f2 / f5 < 1.3. This 0.7 < f2 / f5 < 1.7 requirement effectively controls the contribution of the second and fifth lenses to the system's field curvature.

[0052] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following: 0.2 < (T45 + T56) / T67 < 0.7, where T45 is the distance between the fourth lens and the fifth lens on the optical axis, T56 is the distance between the fifth lens and the sixth lens on the optical axis, and T67 is the distance between the sixth lens and the seventh lens on the optical axis. More specifically, T45, T56, and T67 may further satisfy the following: 0.3 < (T45 + T56) / T67 < 0.6. Satisfying 0.2 < (T45 + T56) / T67 < 0.7 allows for a reasonable allocation of the distance between the fourth lens and the seventh lens, which is beneficial for reasonably controlling the system field curvature and enabling the system to have better imaging capabilities.

[0053] In exemplary embodiments, the optical imaging lens system according to the present application may satisfy the following relationship: 0.5 < f1 / f < 1.0, where f1 is the effective focal length of the first lens element and f is the total effective focal length of the optical imaging lens system. More specifically, f1 and f may further satisfy the following relationship: 0.7 < f1 / f < 0.9. This 0.5 < f1 / f < 1.0 relationship effectively controls the spherical aberration contribution of the first lens element, reducing system aberrations.

[0054] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<f×tan(Semi-FOV) / f56<0.8, wherein f is the total effective focal length of the optical imaging lens group, Semi-FOV is half of the maximum field of view of the optical imaging lens group, and f56 is the combined focal length of the fifth lens and the sixth lens. More specifically, f, Semi-FOV, and f56 may further satisfy: 0.5<f×tan(Semi-FOV) / f56<0.7. Satisfying 0.3<f×tan(Semi-FOV) / f56<0.8 can better control the optical focal length of the fifth lens and the sixth lens, and can reasonably control the contribution of the fifth lens and the sixth lens to the system spherical aberration, so that the entire optical system has smaller spherical aberration and improves the system resolution.

[0055] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following relationship: 0.5 < f6 / f1234 < 1.0, where f6 is the effective focal length of the sixth lens element, and f1234 is the combined focal length of the first, second, third, and fourth lenses. More specifically, f6 and f1234 may further satisfy the following relationship: 0.7 < f6 / f1234 < 1.0. This 0.5 < f6 / f1234 < 1.0 requirement allows for the optimal allocation of the focal power of the first four lenses and the sixth lens element, and allows for the proper control of the positive and negative spherical aberrations generated by each element, resulting in a system with minimal aberrations and improved imaging capabilities.

[0056] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<SAG62 / SAG72<0.8, wherein SAG62 is the distance from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens on the optical axis, and SAG72 is the distance from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens on the optical axis. More specifically, SAG62 and SAG72 may further satisfy: 0.4<SAG62 / SAG72<0.7. Satisfying 0.3<SAG62 / SAG72<0.8 can better control the shapes of the sixth lens and the seventh lens, thereby controlling the direction of light, and making the system better match the chip.

[0057] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.0<SAG52 / SAG11<-0.5, 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 SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens on the optical axis. More specifically, SAG52 and SAG11 may further satisfy: -1.0<SAG52 / SAG11<-0.7. By satisfying -1.0<SAG52 / SAG11<-0.5, the shapes of the first lens and the fifth lens can be reasonably controlled, and then their optical powers can be reasonably distributed, so that lenses with positive optical power and lenses with negative optical power can be better matched to obtain better image quality.

[0058] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following conditions: 0.5 < ET2 / ET6 < 1.5, where ET2 is the edge thickness of the second lens element and ET6 is the edge thickness of the sixth lens element. More specifically, ET2 and ET6 may further satisfy the following conditions: 0.7 < ET2 / ET6 < 1.2. This 0.5 < ET2 / ET6 < 1.5 condition effectively controls the edge thicknesses of the second and sixth lenses, improving lens processability and facilitating lens molding while ensuring image quality at the edges of the field of view.

[0059] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following relationship: 0.5 < R4 / f < 1.5, where R4 is the radius of curvature of the image-side surface of the second lens element, and f is the total effective focal length of the optical imaging lens assembly. More specifically, R4 and f may further satisfy the following relationship: 0.8 < R4 / f < 1.3. This 0.5 < R4 / f < 1.5 relationship effectively reduces the contribution of the image-side surface of the second lens element to the spherical aberration and distortion of the system, resulting in a system with minimal aberrations and improved imaging capabilities.

[0060] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following: -1.0 < f7 / (R13 + R14) < 0, where R13 is the radius of curvature of the object-side surface of the seventh lens element, R14 is the radius of curvature of the image-side surface of the seventh lens element, and f7 is the effective focal length of the seventh lens element. More specifically, f7, R13, and R14 may further satisfy the following: -0.8 < f7 / (R13 + R14) < -0.3. Satisfying -1.0 < f7 / (R13 + R14) < 0 allows for better control of the shape of the seventh lens element, ensuring the processability of the lens element, facilitating its molding, and improving the yield of the system.

[0061] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following conditions: 0.5 < (R2 - R1) / (R1 + R2) < 1.0, where R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, R1 and R2 may further satisfy the following conditions: 0.5 < (R2 - R1) / (R1 + R2) < 0.8. Satisfying 0.5 < (R2 - R1) / (R1 + R2) < 1.0 can effectively control the shape of the first lens, reduce the contribution of the first lens to higher-order aberrations, and provide the system with better resolving power.

[0062] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following conditions: 0.2 < (R8 - R9) / (R8 + R9) < 1.2, where R8 is the radius of curvature of the image-side surface of the fourth lens, and R9 is the radius of curvature of the object-side surface of the fifth lens. More specifically, R8 and R9 may further satisfy the following conditions: 0.3 < (R8 - R9) / (R8 + R9) < 0.8. Satisfying 0.2 < (R8 - R9) / (R8 + R9) < 1.2 can effectively control the shapes of the fourth and fifth lenses, reduce the contribution of the fourth and fifth lenses to higher-order aberrations, and improve the imaging capability of the system.

[0063] In an exemplary embodiment, the optical imaging lens assembly according to the present application can satisfy the following relationship: -1.3 < R12 / R11 < -0.3, where R11 is the radius of curvature of the object-side surface of the sixth lens element, and R12 is the radius of curvature of the image-side surface of the sixth lens element. More specifically, R12 and R11 can further satisfy the following relationship: -1.0 < R12 / R11 < -0.5. Satisfying the relationship of -1.3 < R12 / R11 < -0.3 allows for better control of the shape and focal length of the sixth lens element, rationally manages the direction of light, reduces the lens' contribution to higher-order aberrations, minimizes aberrations in the system, and thus improves the system's resolution.

[0064] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy the following: 0.5 < (CT3 + CT4 + CT5) / (CT1 + CT2) < 1.0, where 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, CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, CT3, CT4, CT5, CT1, and CT2 may further satisfy the following: 0.7 < (CT3 + CT4 + CT5) / (CT1 + CT2) < 0.9. Satisfying 0.5 < (CT3 + CT4 + CT5) / (CT1 + CT2) < 1.0 is conducive to the rational distribution of the center thicknesses of the first five lenses, can better control the contribution of each lens to the system field curvature, so that the system has less field curvature, and thus improve the performance of the system.

[0065] In an exemplary embodiment, the first lens may have positive optical power, a convex object-side surface, and a concave image-side surface. Properly allocating the optical power and surface shape of the first lens can effectively balance the system's low-order aberrations, reduce the system's tolerance sensitivity, improve the system's imaging capabilities, and achieve superior image quality.

[0066] In an exemplary embodiment, the second lens may have negative optical power, and its image-side surface may be concave. Properly allocating the optical power and surface shape of the second lens can effectively balance the system's low-order aberrations, reduce the system's tolerance sensitivity, improve the system's imaging capabilities, and achieve better image quality.

[0067] In an exemplary embodiment, the image-side surface of the fourth lens may be convex. Reasonable distribution of the surface shape of the fourth lens can effectively balance the low-order aberrations of the system, reduce the tolerance sensitivity of the system, improve the imaging capability of the system, and enable the system to have better image quality.

[0068] In an exemplary embodiment, the sixth lens element may have positive optical power and a convex object-side surface. Properly allocating the optical power and surface shape of the sixth lens element effectively balances the system's low-order aberrations, reduces the system's tolerance sensitivity, improves the system's imaging capabilities, and ultimately achieves superior image quality.

[0069] In an exemplary embodiment, the seventh lens element may have negative optical power, and its object-side surface and image-side surface may be concave. Properly allocating the optical power and surface shape of the seventh lens element effectively balances the system's low-order aberrations, reduces the system's tolerance sensitivity, improves the system's imaging capabilities, and achieves superior image quality.

[0070] In an exemplary embodiment, the optical imaging lens assembly according to the present application further includes an aperture disposed between the object side and the first lens. Optionally, the optical imaging lens assembly may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0071] The optical imaging lens assembly according to the above-described embodiment of the present application can utilize multiple lenses, such as the seven lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between lenses, the volume of the optical imaging lens assembly can be effectively reduced and its manufacturability improved, making it more amenable to production and processing and suitable for use in portable electronic products. The optical imaging lens assembly configured in this manner can exhibit advantages such as miniaturization, a large image surface, and excellent imaging quality.

[0072] In an 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 surface of the first lens to the image side surface of the seventh lens is an aspherical mirror surface. The characteristic of an 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, which has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0073] However, those skilled in the art will appreciate that, without departing from the technical solutions claimed in this application, the number of lenses comprising the optical imaging lens assembly can be varied to achieve the various results and advantages described herein. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens assembly is not limited to including seven lenses. If desired, the optical imaging lens assembly can also include other numbers of lenses.

[0074] 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.

[0075] Example 1

[0076] The following reference Figures 1 to 2D The optical imaging lens assembly according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Example 1 of the present application is shown.

[0077] like Figure 1 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0078] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0079] Table 1 shows the basic parameters of the optical imaging lens assembly of Example 1, wherein the units of curvature radius, thickness / distance and focal length are all millimeters (mm).

[0080]

[0081]

[0082] Table 1

[0083] In this example, the total effective focal length f of the optical imaging lens group is 6.70 mm, the total length TTL of the optical imaging lens group (i.e., the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 of the optical imaging lens group) is 7.49 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half the maximum field of view Semi-FOV of the optical imaging lens group is 40.2°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.88.

[0084] In Example 1, the object-side surface and the image-side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0085]

[0086] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the inverse 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, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 and A 26 .

[0087]

[0088]

[0089] Table 2-1

[0090] Face number A16 A18 A20 A22 A24 A26 S1 1.5944E-05 -2.3601E-06 -1.0439E-06 2.1059E-07 -6.9402E-09 0.0000E+00 S2 -2.0101E-04 2.4675E-05 -1.0873E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.4033E-03 -7.1881E-04 6.4741E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.9086E-03 1.6012E-04 2.7949E-05 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.3735E-02 6.1714E-03 -6.8358E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -7.2247E-03 1.1740E-03 -7.1018E-05 0.0000E+00 0.0000E+00 0.0000E+00 S7 -7.3711E-03 1.3108E-03 -9.4429E-05 -9.9422E-08 0.0000E+00 0.0000E+00 S8 -5.0357E-04 7.9572E-05 -5.4578E-06 0.0000E+00 0.0000E+00 0.0000E+00 S9 -2.0510E-04 2.9454E-05 -1.7151E-06 5.7920E-08 -5.8074E-09 0.0000E+00 S10 5.1925E-05 -3.4921E-06 9.2883E-08 -2.2379E-09 1.8588E-10 0.0000E+00 S11 6.8404E-05 -5.3655E-06 1.9658E-07 -5.6065E-09 3.2611E-10 0.0000E+00 S12 1.6857E-06 -1.1102E-07 2.4709E-09 -1.3908E-12 8.4217E-13 0.0000E+00 S13 5.7406E-08 -1.0587E-09 4.1832E-12 1.4104E-13 -2.5392E-15 4.2554E-17 S14 3.3677E-09 -4.1939E-11 -1.9646E-13 4.2071E-15 -7.7222E-17 0.0000E+00

[0091] Table 2-2

[0092] Figure 2A 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 passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens group of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 2C The distortion curve of the optical imaging lens assembly of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The chromatic aberration curve of the optical imaging lens 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. Figures 2A to 2D It can be seen that the optical imaging lens assembly provided in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following reference Figures 3 to 4D The optical imaging lens assembly according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted. Figure 3 A schematic structural diagram of an optical imaging lens assembly according to Example 2 of the present application is shown.

[0095] like Figure 3As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0096] The first lens E1 has positive 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 convex 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 negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0097] In this example, the total effective focal length f of the optical imaging lens group is 6.70 mm, the total length TTL of the optical imaging lens group is 7.49 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 40.2°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.88.

[0098] Table 3 shows the basic parameters of the optical imaging lens assembly of Example 2, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 4-1 and 4-2 show the high-order coefficients of the various aspheric mirror surfaces that can be used in Example 2, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0099]

[0100] Table 3

[0101]

[0102]

[0103] Table 4-1

[0104] Face number A16 A18 A20 A22 A24 A26 S1 8.1708E-04 -1.3479E-04 9.2266E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.1205E-04 -6.4109E-05 7.0120E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.4735E-03 -5.2895E-04 4.8843E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.5496E-02 9.5726E-03 -1.0953E-03 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.8167E-02 8.8175E-03 -1.1312E-03 0.0000E+00 0.0000E+00 0.0000E+00 S6 -7.9611E-03 1.8710E-03 -1.7914E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -1.5574E-02 3.4432E-03 -3.0657E-04 0.0000E+00 0.0000E+00 0.0000E+00 S8 -4.6182E-03 7.8493E-04 -5.4758E-05 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.1498E-03 -1.7539E-04 1.2339E-05 0.0000E+00 0.0000E+00 0.0000E+00 S10 4.0544E-04 -8.5265E-05 1.0760E-05 -6.0268E-07 0.0000E+00 0.0000E+00 S11 1.5736E-03 -4.0273E-04 7.1639E-05 -8.2208E-06 5.4069E-07 -1.5390E-08 S12 2.0245E-05 -3.8673E-06 7.6730E-07 -9.1701E-08 5.6484E-09 -1.4042E-10 S13 -2.7597E-06 1.6146E-07 -6.4103E-09 1.6400E-10 -2.4221E-12 1.5513E-14 S14 -9.4782E-07 5.2393E-08 -2.0059E-09 5.0399E-11 -7.4543E-13 4.9018E-15

[0105] Table 4-2

[0106] Figure 4A 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 passing through the lens. Figure 4B The astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical imaging lens assembly of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The chromatic aberration curve of the optical imaging lens 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. Figures 4A to 4D It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0107] Example 3

[0108] The following reference Figures 5 to 6D An optical imaging lens assembly according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens assembly according to Example 3 of the present application is shown.

[0109] like Figure 5 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0110] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0111] In this example, the total effective focal length f of the optical imaging lens group is 6.70 mm, the total length TTL of the optical imaging lens group is 7.49 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 40.2°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.87.

[0112] Table 5 shows the basic parameters of the optical imaging lens assembly of Example 3, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of the various aspheric mirror surfaces that can be used in Example 3, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0113]

[0114] Table 5

[0115]

[0116]

[0117] Table 6-1

[0118] Face number A16 A18 A20 A22 A24 A26 S1 6.8625E-04 -1.1663E-04 8.2093E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 4.0802E-05 -2.3475E-05 3.0751E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.4210E-03 -3.1844E-04 3.0613E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.3302E-02 3.4843E-03 -3.8392E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.6185E-02 -3.1362E-03 2.2375E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.1363E-02 1.3092E-02 -2.9561E-03 2.8048E-04 0.0000E+00 0.0000E+00 S7 -2.8685E-03 7.5425E-04 -6.9287E-05 0.0000E+00 0.0000E+00 0.0000E+00 S8 -2.5522E-03 4.6543E-04 -3.4776E-05 0.0000E+00 0.0000E+00 0.0000E+00 S9 -5.8100E-05 4.5409E-05 -4.3223E-06 0.0000E+00 0.0000E+00 0.0000E+00 S10 7.2387E-04 -1.1390E-04 1.0505E-05 -4.3060E-07 0.0000E+00 0.0000E+00 S11 -3.5614E-04 5.1165E-05 -3.5074E-07 -8.8483E-07 1.0767E-07 -4.1475E-09 S12 -4.3964E-04 7.5875E-05 -8.5433E-06 6.0579E-07 -2.4613E-08 4.3764E-10 S13 -8.5248E-06 6.0176E-07 -2.8768E-08 8.9164E-10 -1.6186E-11 1.3075E-13 S14 -1.4486E-06 8.2698E-08 -3.2315E-09 8.2203E-11 -1.2244E-12 8.0831E-15

[0119] Table 6-2

[0120] Figure 6A 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 passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens group of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical imaging lens assembly of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6D The chromatic aberration curve of the optical imaging lens 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. 6A to 6D It can be seen that the optical imaging lens assembly provided in Example 3 can achieve good imaging quality.

[0121] Example 4

[0122] The following reference Figures 7 to 8D An optical imaging lens assembly according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens assembly according to Example 4 of the present application is shown.

[0123] like Figure 7 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0124] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0125] In this example, the total effective focal length f of the optical imaging lens group is 6.71 mm, the total length TTL of the optical imaging lens group is 7.49 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 40.2°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.85.

[0126] Table 7 shows the basic parameters of the optical imaging lens assembly of Example 4, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of the various aspheric mirror surfaces 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.

[0127]

[0128] Table 7

[0129]

[0130]

[0131] Table 8-1

[0132] Face number A16 A18 A20 A22 A24 A26 S1 8.6690E-04 -1.4393E-04 9.9617E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.4104E-05 -1.6439E-05 2.7331E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.0346E-03 -6.4619E-04 5.8653E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.2267E-02 3.2470E-03 -3.6176E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 2.6474E-02 -5.7499E-03 5.0947E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.9256E-02 1.1842E-02 -2.6207E-03 2.4543E-04 0.0000E+00 0.0000E+00 S7 -2.4862E-03 6.2165E-04 -5.5364E-05 0.0000E+00 0.0000E+00 0.0000E+00 S8 -3.1711E-03 5.5931E-04 -4.0563E-05 0.0000E+00 0.0000E+00 0.0000E+00 S9 -7.6643E-04 1.4579E-04 -1.0162E-05 0.0000E+00 0.0000E+00 0.0000E+00 S10 2.1602E-04 -4.2412E-05 4.9750E-06 -2.5362E-07 0.0000E+00 0.0000E+00 S11 4.6883E-06 -4.3492E-05 1.4627E-05 -2.2974E-06 1.8040E-07 -5.7055E-09 S12 -4.5163E-04 7.5315E-05 -8.2223E-06 5.6726E-07 -2.2497E-08 3.9159E-10 S13 -8.2266E-06 5.6654E-07 -2.6410E-08 7.9717E-10 -1.4073E-11 1.1039E-13 S14 -1.2104E-06 6.0009E-08 -1.9359E-09 3.7236E-11 -3.4818E-13 7.2116E-16

[0133] Table 8-2

[0134] Figure 8A 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 passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens group of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical imaging lens assembly of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8D The 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. Figures 8A to 8D It can be seen that the optical imaging lens assembly provided in Example 4 can achieve good imaging quality.

[0135] Example 5

[0136] The following reference Figures 9 to 10D An optical imaging lens assembly according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens assembly according to Example 5 of the present application is shown.

[0137] like Figure 9 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0138] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0139] In this example, the total effective focal length f of the optical imaging lens group is 6.70 mm, the total length TTL of the optical imaging lens group is 7.49 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 40.1°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.87.

[0140] Table 9 shows the basic parameters of the optical imaging lens assembly of Example 5, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 10-1 and 10-2 show the high-order coefficients of the various aspheric mirror surfaces 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.

[0141]

[0142] Table 9

[0143]

[0144]

[0145] Table 10-1

[0146] Face number A16 A18 A20 A22 A24 A26 S1 3.7694E-04 -7.1193E-05 5.4827E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -3.1447E-06 -5.2726E-06 8.2469E-07 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.9886E-03 -4.1511E-04 3.7289E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -9.9470E-03 2.6067E-03 -2.8349E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.3994E-02 -1.0221E-02 9.7450E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 4.1937E-02 -9.3856E-03 8.9357E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 6.0055E-04 2.6136E-04 -4.1162E-05 0.0000E+00 0.0000E+00 0.0000E+00 S8 -3.1523E-03 5.4219E-04 -3.8897E-05 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.4281E-05 6.3268E-06 -6.7797E-07 0.0000E+00 0.0000E+00 0.0000E+00 S10 5.8844E-04 -1.0390E-04 9.8289E-06 -3.8796E-07 0.0000E+00 0.0000E+00 S11 -1.8705E-03 4.3404E-04 -6.2378E-05 5.2690E-06 -2.3137E-07 3.7641E-09 S12 -4.5636E-04 8.3809E-05 -9.9772E-06 7.4536E-07 -3.1841E-08 5.9445E-10 S13 -8.3680E-06 5.3522E-07 -2.3137E-08 6.4744E-10 -1.0598E-11 7.7098E-14 S14 -1.2534E-06 6.0895E-08 -1.9322E-09 3.6987E-11 -3.5759E-13 9.9474E-16

[0147] Table 10-2

[0148] Figure 10A 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 passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens group of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 10C The distortion curve of the optical imaging lens assembly of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 10D The chromatic aberration curve of the optical imaging lens 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. 10A to 10D It can be seen that the optical imaging lens assembly provided in Example 5 can achieve good imaging quality.

[0149] Example 6

[0150] The following reference Figures 11 to 12D An optical imaging lens assembly according to Example 6 of the present application is described. Figure 11 A structural schematic diagram of an optical imaging lens group according to Example 6 of the present application is shown.

[0151] like Figure 11 As shown, the optical imaging lens group includes, from the object side to the image side, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0152] The first lens E1 has positive 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 positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has 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 concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0153] In this example, the total effective focal length f of the optical imaging lens group is 6.71 mm, the total length TTL of the optical imaging lens group is 7.49 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical imaging lens group is 5.75 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 40.1°, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 1.87.

[0154] Table 11 shows the basic parameters of the optical imaging lens assembly of Example 6, where the units of curvature radius, thickness / distance, and focal length are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of the various aspheric mirror surfaces that can be used in Example 6, where the surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0155]

[0156] Table 11

[0157] Face number A4 A6 A8 A10 A12 A14 S1 1.3435E-04 -4.2473E-04 1.6175E-03 -2.6055E-03 2.3007E-03 -1.2193E-03 S2 -1.0998E-02 9.0517E-04 5.3208E-03 -9.0514E-03 8.2102E-03 -4.6204E-03 S3 -9.3145E-03 1.1007E-02 3.0338E-03 -9.8007E-03 9.4671E-03 -5.4638E-03 S4 -1.2356E-03 1.6670E-02 -1.4156E-02 2.2182E-02 -2.6472E-02 1.9703E-02 S5 -2.0777E-02 -2.7884E-02 5.9861E-02 -1.1106E-01 1.2356E-01 -8.5858E-02 S6 -6.5816E-03 -4.2435E-02 6.7828E-02 -1.0726E-01 1.0918E-01 -6.9478E-02 S7 -1.0604E-02 -1.9616E-02 9.8989E-03 -3.5013E-03 -4.3847E-03 8.4691E-03 S8 -2.5227E-02 5.2497E-03 -1.8130E-02 1.9016E-02 -1.2886E-02 6.1207E-03 S9 -4.2761E-02 1.9475E-02 -9.4177E-03 -2.1142E-03 3.9703E-03 -1.7087E-03 S10 -7.0500E-02 3.0492E-02 -1.0518E-02 -1.8018E-05 2.1053E-03 -1.1305E-03 S11 -3.9524E-02 2.1173E-03 -2.2264E-03 1.1119E-03 -9.3362E-04 6.6374E-04 S12 1.3653E-02 -9.5301E-03 -1.3232E-03 2.4591E-03 -1.4016E-03 5.6300E-04 S13 -2.5051E-02 1.5201E-02 -7.8414E-03 2.7717E-03 -6.1407E-04 8.9089E-05 S14 -3.4466E-02 1.2780E-02 -4.1791E-03 9.6481E-04 -1.5282E-04 1.6713E-05

[0158] Table 12-1

[0159] Face number A16 A18 A20 A22 A24 A26 S1 3.7771E-04 -6.3889E-05 4.4201E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.5570E-03 -2.8584E-04 2.1893E-05 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.9710E-03 -3.9769E-04 3.4162E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -8.6648E-03 2.0760E-03 -2.0141E-04 0.0000E+00 0.0000E+00 0.0000E+00 S5 3.6012E-02 -8.1622E-03 7.5796E-04 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.7610E-02 -6.1614E-03 5.8000E-04 0.0000E+00 0.0000E+00 0.0000E+00 S7 -4.7029E-03 1.1141E-03 -9.8545E-05 0.0000E+00 0.0000E+00 0.0000E+00 S8 -1.8532E-03 3.1372E-04 -2.2279E-05 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.6910E-04 -4.2363E-05 2.1238E-06 0.0000E+00 0.0000E+00 0.0000E+00 S10 3.0708E-04 -4.7210E-05 3.8655E-06 -1.2769E-07 0.0000E+00 0.0000E+00 S11 -2.5679E-04 5.2655E-05 -5.1088E-06 7.2594E-08 2.3925E-08 -1.3025E-09 S12 -1.5164E-04 2.6557E-05 -2.9922E-06 2.0999E-07 -8.3750E-09 1.4526E-10 S13 -8.7582E-06 5.9000E-07 -2.6898E-08 7.9457E-10 -1.3741E-11 1.0569E-13 S14 -1.2671E-06 6.5917E-08 -2.2824E-09 4.9388E-11 -5.8582E-13 2.7185E-15

[0160] Table 12-2

[0161] Figure 12A 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 passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12C The distortion curve of the optical imaging lens assembly of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 12D The 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. 12A to 12D It can be seen that the optical imaging lens assembly provided in Example 6 can achieve good imaging quality.

[0162] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0163] Conditional formula / Example 1 2 3 4 5 6 TTL / ImgH 1.30 1.30 1.30 1.30 1.30 1.30 f2 / f5 0.78 0.75 0.78 0.93 1.21 0.90 f1 / f 0.83 0.81 0.80 0.80 0.76 0.77 (T45+T56) / T67 0.55 0.49 0.43 0.43 0.32 0.40 f×tan(Semi-FOV) / f56 0.57 0.61 0.56 0.57 0.54 0.54 f6 / f1234 0.94 0.93 0.97 0.93 0.79 0.89 SAG62 / SAG72 0.56 0.59 0.48 0.51 0.50 0.48 SAG52 / SAG11 -0.86 -0.73 -0.85 -0.81 -0.89 -0.82 ET2 / ET6 0.75 1.12 0.91 0.87 0.89 0.82 R4 / f 0.88 0.96 0.96 0.97 0.98 1.25 f7 / (R13+R14) -0.39 -0.71 -0.70 -0.74 -0.73 -0.70 (R2-R1) / (R1+R2) 0.59 0.63 0.64 0.64 0.69 0.67 (R8-R9) / (R8+R9) 0.73 0.34 0.33 0.34 0.48 0.34 R12 / R11 -0.71 -0.58 -0.55 -0.67 -0.79 -0.96 (CT3+CT4+CT5) / (CT1+CT2) 0.87 0.76 0.81 0.79 0.79 0.82

[0164] Table 13

[0165] 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.

[0166] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. An optical imaging lens assembly, comprising, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, its object-side surface is convex and its image-side surface is concave; a second lens element having negative optical power and a concave image-side surface; a third lens having optical power; a fourth lens element having optical power and a convex image-side surface; a fifth lens element having negative optical power and a concave object-side surface; a sixth lens element having positive optical power, with its object-side surface being convex and its image-side surface being convex; and a seventh lens element having negative optical power, whose object-side surface and image-side surface are concave; At least one of the third lens and the fourth lens has positive refractive power; The number of lenses having optical power in the optical imaging lens group is seven; The total effective focal length f of the optical imaging lens group, half of the maximum field of view Semi-FOV of the optical imaging lens group, and the combined focal length f56 of the fifth lens and the sixth lens satisfy the following conditions: 0.5<f×tan(Semi-FOV) / f56≤0.61; The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens assembly on the optical axis and half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens assembly ImgH satisfy the following conditions: 1.30≤TTL / ImgH<1.35; The effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy the following: 0.75≤f2 / f5≤1.

21.

2. The optical imaging lens assembly according to claim 1, wherein: The total effective focal length f of the optical imaging lens group and the entrance pupil diameter EPD of the optical imaging lens group satisfy the following: 1.85≤f / EPD<1.

9.

3. The optical imaging lens assembly according to claim 1, wherein: A distance T45 between the fourth lens and the fifth lens on the optical axis, a distance T56 between the fifth lens and the sixth lens on the optical axis, and a distance T67 between the sixth lens and the seventh lens on the optical axis satisfy the following: 0.3<(T45+T56) / T67≤0.

55.

4. The optical imaging lens assembly according to claim 1, wherein: The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens group satisfy the following: 0.76≤f1 / f≤0.

83.

5. The optical imaging lens assembly according to claim 1, wherein: Half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group satisfies the following: 5.5mm<ImgH≤5.75mm.

6. The optical imaging lens assembly according to claim 1, wherein: The effective focal length f6 of the sixth lens and the combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens satisfy the following: 0.79≤f6 / f1234<1.

0.

7. The optical imaging lens assembly according to claim 1, wherein: The distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens on the optical axis and the distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens on the optical axis satisfy: 0.48≤SAG62 / SAG72≤0.

59.

8. The optical imaging lens assembly according to claim 1, wherein: The distance SAG11 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 the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens on the optical axis satisfy: -0.89≤SAG52 / SAG11<-0.

7.

9. The optical imaging lens assembly according to claim 1, wherein: An edge thickness ET2 of the second lens and an edge thickness ET6 of the sixth lens satisfy the following: 0.75≤ET2 / ET6≤1.

12.

10. The optical imaging lens assembly according to claim 1, wherein: The curvature radius R4 of the image-side surface of the second lens and the total effective focal length f of the optical imaging lens group satisfy the following: 0.88≤R4 / f≤1.

25.

11. 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, and an effective focal length f7 of the seventh lens satisfy: -0.74≤f7 / (R13+R14)≤-0.

39.

12. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy: 0.59≤(R2-R1) / (R1+R2)≤0.

69.

13. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R8 of the image-side surface of the fourth lens and a curvature radius R9 of the object-side surface of the fifth lens satisfy the following relationship: 0.3<(R8-R9) / (R8+R9)≤0.

73.

14. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R11 of the object-side surface of the sixth lens and a curvature radius R12 of the image-side surface of the sixth lens satisfy: -1.0<R12 / R11≤-0.

55.

15. The optical imaging lens assembly according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy the following: 0.76≤(CT3+CT4+CT5) / (CT1+CT2)<0.9.

Images