Lens assembly, camera module and electronic equipment

Abstract

The embodiment of the invention provides a lens assembly, a camera module and electronic equipment, and the lens assembly meets the condition that 2IMH / (TTL * F #) is greater than or equal to 0.85 and less than or equal to 1.5, meets the large-aperture, large-target-surface and low-total-height architecture design, improves the imaging quality, and facilitates the thinning of the camera module. The refractive index of the first lens and the refractive index of the second lens meet the condition that nd2-nd1 is greater than 0.1 and less than 0.15, and the Abbe number of the first lens and the Abbe number of the second lens meet the condition that vd1-vd2 is greater than 0 and less than 40, so that the design purposes of large aperture, large target surface and smaller total length are achieved while the cost of the lens assembly is reduced, and the thinned lens assembly with low cost and excellent imaging quality is obtained; and the practicability and the machinability of the lens assembly are obviously improved.

Description

Lens assemblies, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on April 8, 2022, with application number 202210367876.4 and application name “Lens assembly, camera module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic equipment, and in particular to a lens assembly, a camera module and an electronic device. Background Art

[0003] Camera modules have become an indispensable functional component in electronic products such as mobile phones, tablets, laptops and wearable devices. As electronic devices become thinner and more multifunctional, the camera modules on them are gradually becoming smaller and thinner. The effect and demand for taking pictures are becoming more and more comparable to those of SLR cameras. The size and functional effect of camera modules have gradually become one of the important characteristics of electronic devices.

[0004] A camera module consists of a lens assembly and an image sensor. The lens assembly is typically composed of multiple lens elements arranged in sequence along the optical axis. Light passes through the lens assembly and is projected onto the image sensor for photoelectric conversion, which is then used to form an image. Therefore, the performance of the lens assembly directly determines the imaging performance of the camera module. Cameras in current electronic devices are increasingly pursuing designs with large apertures, large image surfaces, and low overall height. Large apertures facilitate camera functions such as night scene photography, snapshots, video, and background blur. Large image surfaces improve brightness and resolution, thereby enhancing camera functionality. Low overall height refers to the reduced overall length of the lens assembly, which facilitates the thinning of camera modules.

[0005] However, the cost of existing large aperture lens assemblies that take into account both a large target area and a low overall height is relatively high, which affects the processability and practicality of the lens assembly.

[0006] Summary of the Invention

[0007] The present application provides a lens assembly, a camera module and an electronic device, which solve the problem that the existing lens assembly has high cost and poor imaging quality when meeting the requirements of large aperture, large target area and low overall height architecture design.

[0008] A first aspect of the present application provides a lens assembly comprising a plurality of lenses, the plurality of lenses comprising at least a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along an optical axis;

[0009] The lens assembly satisfies the conditional formula: 0.85 ≤ 2×IMH / (TTL×F#) ≤ 1.5, where IMH is the semi-image height of the lens assembly, F# is the aperture number of the lens assembly, and TTL is the total length of the lens assembly. When the lens assembly has a relatively small aperture number and a relatively large semi-image height, it can have a relatively small total length. At the same time, it meets the design requirements of a large aperture, a large target surface, and a relatively small total length of the lens assembly, that is, a lens assembly with a large aperture, a large target surface, and a low total height structure is provided, which is beneficial to the thinning design of the camera module while improving the imaging quality and effect of the camera module.

[0010] Moreover, the refractive index nd1 of the first lens and the refractive index nd2 of the second lens satisfy the conditional formula: 0.1 < nd2 - nd1 < 0.15, and the Abbe number vd1 of the first lens and the Abbe number vd2 of the second lens satisfy the conditional formula: 0 < vd1 - vd2 < 40. Under this parameter condition, lenses with relatively low material costs can be realized. For example, both the first lens and the second lens can be plastic lenses, which helps to reduce the cost of the lens assembly and further reduces the processing cost of the camera module. In some cases, in order to further reduce costs, both the first lens and the second lens can be lenses with relatively small Abbe numbers, and their material costs are relatively lower. Thus, by assembling lenses with relatively low usage costs and relatively small Abbe numbers, a lens assembly that satisfies the above conditional formula can be obtained, achieving the design purpose of a large aperture, a large target surface, and a smaller total length, obtaining a thin lens assembly with low cost and excellent imaging quality, and significantly improving the practicability and processability of the lens assembly.

[0011] Furthermore, in order to improve the imaging quality, the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy the conditional formula: |f3 / f4| > 2.5, which can reasonably distribute the optical power of the third lens and the fourth lens, achieve the purpose of correcting aberrations, reduce imaging aberrations, and thus ensure the imaging quality.

[0012] In a possible implementation, the distance d45 in the optical axis direction from the image side of the fourth lens to the object side of the fifth lens satisfies the conditional formula: 0.03 < d45 / TTL < 0.25. This is beneficial to improving the processability of the fourth lens and the fifth lens, and at the same time, it is also convenient for arranging the fourth lens and the fifth lens, and facilitating the assembly setting of the lens assembly.

[0013] In a possible implementation, the Abbe number vd3 of the third lens and the Abbe number vd5 of the fifth lens satisfy the conditional formula: vd3 / vd5 < 1. The third lens and the fifth lens can be lenses with relatively low Abbe numbers, and the third lens and the fifth lens can also be plastic lenses. The fifth lens can be a plastic lens with a relatively large Abbe number, which helps to improve the imaging quality while reducing the cost of the lens assembly.

[0014] In one possible implementation, the Abbe number vd2 of the second lens, vd3 of the third lens, and vd4 of the fourth lens satisfy the condition: vd2+vd3+vd4>92, so that the second lens, the third lens, and the fourth lens can also be lenses with relatively small Abbe numbers, and the third lens and the fourth lens can also be plastic lenses, thereby further reducing the cost of the lens assembly while achieving a large aperture, a large target area, and a small total length of the lens.

[0015] In one possible implementation, the refractive index of the fourth lens nd4 is less than 1.69, that is, the refractive index of the fourth lens is relatively small. The fourth lens can be a lens with a relatively large Abbe number among plastic lenses, which is beneficial to improving imaging quality while reducing the cost of the lens assembly.

[0016] In one possible implementation, at least the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are plastic lenses, which can significantly reduce the cost of the lens assembly while meeting the design requirements of large aperture, large target area, and low overall height of the lens assembly, and improve the processability and practicality of the lens assembly.

[0017] In one possible implementation, the first lens has positive power, and the second lens has negative power. In other words, the first lens converges light, while the second lens disperses it. This combination of the first and second lenses can reduce overall length while also helping to minimize aberrations and improve image quality.

[0018] In one possible implementation, at least the portion of the image-side surface of the first lens corresponding to the optical axis is concave, which can reasonably distribute the optical power of the first lens, reduce aberrations, optimize the image quality of the central field of view, and thus improve the imaging quality.

[0019] In one possible implementation, the third lens has negative optical power, and the second lens and the third lens work together to correct aberrations, which helps to reduce the processing difficulty of the second lens and facilitates implementation.

[0020] The fourth lens has positive power and is used to correct aberrations introduced by the front lenses (such as the first lens, the second lens, and the third lens) to improve imaging quality.

[0021] In one possible implementation, at least the portion of the object-side surface of the third lens corresponding to the optical axis is concave, and at least the portion of the image-side surface of the third lens corresponding to the optical axis is convex. This can reasonably distribute the optical focal length of the third lens, reduce aberrations, and help improve imaging quality.

[0022] In one possible implementation, at least the portion of the image-side surface of the fourth lens corresponding to the optical axis is a convex surface, which can reasonably distribute the optical power of the fourth lens, reduce aberrations, and improve imaging quality.

[0023] In one possible implementation, the radius of curvature R2 of the image side of the first lens and the radius of curvature R3 of the object side of the second lens satisfy the condition: R2 / R3>1.4. This allows for a more rational distribution of the shapes and arrangement of the first and second lenses, facilitating their processing and assembly.

[0024] In one possible implementation, the focal length f4 of the fourth lens element and the total focal length f of the lens assembly satisfy the condition: 0≤f4 / f≤10, thereby rationally distributing the optical power of the fourth lens element, reducing aberrations, and further improving imaging quality.

[0025] In one possible implementation, the number N of lenses satisfies the condition: 6≤N≤10. This ensures that the lens assembly has a relatively low total length while increasing the design freedom of the lens assembly, thereby facilitating a large aperture and a large target surface design.

[0026] In one possible implementation, the focal length fi of each lens and the total focal length f of the lens assembly satisfy the condition: ∑ i＝1…N |f / fi|>3, where fi is the focal length of the i-th lens, and i=1…N. This allows for a reasonable distribution of the focal power of the N lenses, achieving the goal of correcting aberrations and further improving image quality.

[0027] In one possible implementation, the multiple lenses also include a seventh lens, which is located on the side of the sixth lens facing the image side. The seventh lens has negative optical power, that is, the seventh lens serves to disperse light, which can further correct the aberration, help reduce the aberration, and improve the imaging quality.

[0028] In one possible implementation, at least the portion of the object-side surface of the seventh lens corresponding to the optical axis is concave, and at least the portion of the image-side surface of the seventh lens corresponding to the optical axis is concave. This can reasonably distribute the optical power of the seventh lens, thereby reducing aberrations, optimizing the image quality of the central field of view, and thereby improving imaging quality.

[0029] In one possible implementation, the object side curvature radius R13 of the seventh lens element and the total focal length f of the lens assembly satisfy the condition: 0≤|R13 / f|≤1.8, which is beneficial to improving the machinability of the seventh lens element and also facilitates the arrangement of the seventh lens element and the assembly and arrangement of the lens assembly.

[0030] In one possible implementation, the focal length f1 of the first lens, the focal length f6 of the sixth lens, and the focal length f7 of the seventh lens satisfy the condition: f1 / (f6+f7)>1.4. This can reasonably distribute the optical focal length, achieve the purpose of correcting aberrations, reduce aberrations, and help further improve the imaging quality.

[0031] A second aspect of the present application provides a camera module comprising at least an image sensor and any of the aforementioned lens assemblies, wherein the image sensor is located on the image-facing side of the lens assembly. The inclusion of the lens assembly, which has a large aperture, a large target area, and a low overall height, and is relatively low in cost, can significantly improve the camera module's shooting performance, enhance imaging quality, and reduce the overall cost of the camera module. This also facilitates thinning the camera module, resulting in an ultra-thin camera module that is low-cost and has good imaging quality.

[0032] A third aspect of the present application provides an electronic device comprising at least a housing and the aforementioned camera module, wherein the camera module is disposed on the housing. The inclusion of the camera module provides low cost, excellent imaging quality, and ultra-thin performance, thereby helping to reduce the cost of the electronic device, improve the imaging performance of the electronic device, and facilitate the thinning design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0034] FIG2 is a schematic structural diagram of a camera module provided in an embodiment of the present application;

[0035] FIG3 is a schematic diagram of a simulation structure of a camera module provided in Example 1 of the present application;

[0036] FIG4 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 1 of the present application;

[0037] FIG5 is a diagram of astigmatism field curvature of a lens assembly provided in Example 1 of the present application;

[0038] FIG6 is a distortion curve diagram of a lens assembly provided in Example 1 of the present application;

[0039] FIG7 is a schematic diagram of a simulation structure of a camera module provided in Example 2 of the present application;

[0040] FIG8 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 2 of the present application;

[0041] FIG9 is a diagram of astigmatism field curvature of a lens assembly provided in Example 2 of the present application;

[0042] FIG10 is a distortion curve diagram of a lens assembly provided in Example 2 of the present application;

[0043] FIG11 is a schematic diagram of a simulation structure of a camera module provided in Example 3 of the present application;

[0044] FIG12 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 3 of the present application;

[0045] FIG13 is a diagram of astigmatism field curvature of a lens assembly provided in Example 3 of the present application;

[0046] FIG14 is a distortion curve diagram of a lens assembly provided in Example 3 of the present application;

[0047] FIG15 is a schematic diagram of a simulation structure of a camera module provided in Example 4 of the present application;

[0048] FIG16 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 4 of the present application;

[0049] FIG17 is a diagram of astigmatism field curvature of a lens assembly provided in Example 4 of the present application;

[0050] FIG18 is a distortion curve diagram of a lens assembly provided in Example 4 of the present application;

[0051] FIG19 is a schematic diagram of a simulation structure of a camera module provided in Example 5 of the present application;

[0052] FIG20 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 5 of the present application;

[0053] FIG21 is a diagram of astigmatism field curvature of a lens assembly provided in Example 5 of the present application;

[0054] FIG22 is a distortion curve diagram of a lens assembly provided in Example 5 of the present application;

[0055] FIG23 is a schematic diagram of a simulation structure of a camera module provided in Example 6 of the present application;

[0056] FIG24 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 6 of the present application;

[0057] FIG25 is a diagram of astigmatism field curvature of a lens assembly provided in Example 6 of the present application;

[0058] FIG26 is a distortion curve diagram of a lens assembly provided in Example 6 of the present application;

[0059] FIG27 is a schematic diagram of a simulation structure of a camera module provided in Example 7 of the present application;

[0060] FIG28 is a graph showing an axial chromatic aberration curve of a lens assembly provided in Example 7 of the present application;

[0061] FIG29 is a diagram of astigmatism field curvature of a lens assembly provided in Example 7 of the present application;

[0062] Figure 30 is a distortion curve diagram of a lens assembly provided in Example 7 of the present application.

[0063] Description of reference numerals:

[0064] 100-Electronic device; 10-Camera module; 11-Lens assembly;

[0065] 111-first lens; 112-second lens; 113-third lens;

[0066] 114- fourth lens; 115- fifth lens; 116- sixth lens;

[0067] 117-seventh lens; 118-aperture; 12-filter;

[0068] 13- imaging surface; 20- housing. DETAILED DESCRIPTION

[0069] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0070] To facilitate understanding, the relevant technical terms involved in the embodiments of this application are first explained and illustrated.

[0071] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens assembly to the focal plane, when an infinitely distant object is formed into a sharp image on the focal plane. From a practical perspective, it can be understood as the distance from the center of the lens (lens assembly) to the imaging plane.

[0072] The optical axis refers to the light rays passing through the centers of the lenses in the lens assembly.

[0073] The field of view (FOV) is the angle between the two edges of the lens, with the lens as the vertex, and the maximum range through which the image of the subject can pass. The FOV determines the lens's field of view; a larger FOV means a wider field of view.

[0074] The aperture is a device used to control the amount of light that passes through the lens and enters the interior of an electronic device. It is usually located inside the lens, and the aperture size is expressed in F# values.

[0075] The aperture number F# is a relative value obtained by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). The smaller the aperture number F#, the more light enters in the same unit time, the smaller the depth of field, and the background content of the photo will be blurred, producing an effect similar to that of a telephoto lens.

[0076] Optical power represents the ability of a lens to refract an incident parallel light beam.

[0077] Positive optical power means that the lens has a positive focal length and has the effect of converging light.

[0078] Negative optical power means that the lens has a negative focal length and has the effect of diverging light.

[0079] The object side, with the lens assembly as the boundary, the side where the object is located is the object side, and the side of the lens facing the object side is the object side of the lens.

[0080] Image side: The side where the image of the object is located is the image side, and the side of the lens facing the image side is the image side.

[0081] Total Track Length (TTL) refers to the total length from the vertex of the first lens element located adjacent to the object side of a lens assembly to the imaging surface of the lens assembly, also known as the total optical length. In this application, TTL refers to the distance from the object side (o) of the first lens element to the photosensitive surface of the image sensor along the optical axis of the multiple lens elements in the lens assembly (see Figure 2).

[0082] Image Height (IH) refers to the total height of the image formed by the lens assembly. Image Half Height (IMH) refers to half of the total height.

[0083] The target surface refers to the photosensitive surface of the image sensor. The larger the target surface, the greater the sensitivity of the image sensor and the greater the image height.

[0084] The Abbe number, also known as the dispersion coefficient, refers to the difference ratio of the refractive index of an optical material at different wavelengths, indicating the degree of dispersion of the material.

[0085] Refractive index is the ratio of the speed of light in air to the speed of light in an optical material. The higher the refractive index of an optical material, the stronger its ability to refract incident light and the thinner the lens. Generally, the higher the refractive index of a lens, the smaller its Abbe number.

[0086] Axial chromatic aberration refers to a beam of light parallel to the optical axis converging at different positions before and after passing through the lens. This aberration is called positional chromatic aberration or axial chromatic aberration. This is because the positions of the images of light of different wavelengths formed by the lens component are different, making the focal planes of the images of different colors of light unable to coincide in the final image, and the complex light spreads out to form dispersion.

[0087] Distortion, also known as distortion, is the degree to which the image of a subject formed by a lens assembly is distorted relative to the subject itself. Distortion is the difference between the ideal image height and the point at which the chief ray of light from different fields of view intersects the Gaussian image plane.

[0088] An electronic device provided in an embodiment of the present application may include, but is not limited to, mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, vehicle-mounted devices, and other electronic devices with camera modules.

[0089] In the embodiment of the present application, the electronic device is taken as an example of a mobile phone. The mobile phone may be a bar phone, or the mobile phone may be a folding phone. Specifically, the following description will be made by taking the electronic device as a bar phone as an example.

[0090] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0091] As shown in FIG1 , the electronic device 100 may include a housing 20 and a camera module 10 , wherein the camera module 10 may be disposed on the housing 20 , and the camera module 10 is used to implement a shooting function.

[0092] The camera module 10 can be located on the front side (the side with the display screen) of the electronic device 100 for taking selfies or photographing other objects. Alternatively, as shown in FIG1 , the camera module 10 can also be located on the back side (the side facing away from the display screen) of the electronic device 100 for photographing other objects, including selfies.

[0093] The number of camera modules 10 included in the electronic device 100 may be one, or the number of camera modules 10 may be multiple, so as to meet different shooting requirements.

[0094] The electronic device 100 may further include other structural components. For example, as shown in FIG1 , the housing 20 of the electronic device 100 may further include a speaker 30, which may be used to play audio and the like of the electronic device 100. The housing 20 of the electronic device 100 may further include a data interface 40, which may be used to power the electronic device 100 or to connect the electronic device 100 to headphones, external multimedia devices, and the like (such as an external camera or an external projection device).

[0095] Of course, in some other examples, the electronic device 100 may also include other structural components to complete the functions of the electronic device 100, such as sensors, processors, circuit boards, drive structures, etc., which are not limited in the embodiments of the present application.

[0096] A camera module typically includes a lens assembly and an image sensor. Light enters the camera module through the lens assembly. Specifically, light reflected by the object being photographed enters the lens assembly. After the light passes through the lens assembly, the optical path is adjusted and controlled, generating a light image that is then irradiated onto the photosensitive surface of the image sensor. The image sensor performs photoelectric conversion, receiving the light image and converting it into an electrical signal for imaging display.

[0097] The camera module may also include an image processor, a memory, etc. The image sensor may transmit the electrical signal to the image processor and the memory for processing, and then the image of the photographed object may be displayed through the display screen of the electronic device.

[0098] The optical performance of the lens assembly will have a significant impact on the imaging quality and effect of the camera module. For example, the aperture number of the lens assembly will affect night scene shooting, video, background blur, and snapshot functions. In other words, a camera module with a large aperture has better imaging quality and imaging effects in scenes such as night scene shooting, video, background blur, and snapshot.

[0099] The target surface size of the lens assembly is also one of the important factors affecting the imaging quality. A camera module with a large target surface is conducive to improving the imaging brightness and resolution of the camera module, thereby obtaining better imaging quality.

[0100] As electronic devices become thinner and lighter, the demand for thinner camera module designs is also increasing. Low overall height design of lens assemblies is becoming increasingly important. Low overall height refers to a lens assembly with a shorter overall length, thereby reducing the space occupied by the lens assembly, which facilitates the thinning of camera modules and thus meets the requirements of thinner and lighter electronic devices. Therefore, lens assemblies with low overall height while accommodating large apertures and large image areas have become an inevitable development trend. However, existing lens assemblies with low overall height, large image areas, and large apertures are relatively expensive, which affects the processability and practicality of the lens assemblies.

[0101] Based on this, an embodiment of the present application provides a lens assembly that has a small total length while achieving high imaging quality with a large aperture and a large target surface, meeting the design requirements of the lens assembly for low total height, large target surface and large aperture, and the lens assembly also has a low cost.

[0102] The lens assembly provided in the embodiments of the present application and the camera module including the lens assembly are described in detail below with reference to the accompanying drawings.

[0103] FIG2 is a schematic structural diagram of a camera module provided in an embodiment of the present application.

[0104] As shown in Figure 2, the camera module 10 provided in an embodiment of the present application includes a lens assembly 11 and an image sensor 13, wherein the image sensor 13 is located on the side of the lens assembly 11 facing the image side, and the photosensitive surface (also referred to as the imaging surface) of the image sensor 13 can face the lens assembly 11. The light entering the camera module 10 from the lens assembly 11 can be irradiated onto the photosensitive surface of the image sensor 13 after passing through the lens assembly 11 to realize imaging of the light.

[0105] The image sensor 13 may be a charge-coupled device (CCD), or a complementary metal oxide semiconductor (CMOS), or other devices capable of achieving a photoelectric conversion function.

[0106] Continuing with Figure 2 , the camera module 10 may also include a filter 12, which can be positioned between the lens assembly 11 and the image sensor 13. Light passing through the lens assembly 11 passes through the filter 12 before being irradiated onto the photosensitive surface of the image sensor 13. The filter 12 filters light, allowing it to pass within a specific wavelength range, thereby filtering out stray light that could be detrimental to imaging and improving image quality. The following figures primarily refer to the lens assembly, with the image sensor and filter used for illustrative purposes.

[0107] The camera module 10 may further include a lens barrel (not shown in the figure), and the lens assembly 11, the filter 12 and the image sensor 13 may be arranged in the lens barrel.

[0108] The lens assembly 11 may include a plurality of lenses, each of which may have an optical power. Taking the dotted line L in FIG2 as the optical axis of the lens assembly 11, the plurality of lenses may be arranged in sequence along the optical axis, and the optical axis of the lens assembly 11 may coincide with the central axis of the lens barrel.

[0109] Specifically, the lens assembly 11 includes at least a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115 and a sixth lens 116 arranged in sequence from the object side to the image side along the optical axis, that is, the lens assembly 11 includes at least the above six lenses.

[0110] It should be understood that the lens assembly 11 may include only the aforementioned six lenses, or, in addition to the aforementioned six lenses, may also include another number of lenses. In other words, the number of lenses may be N. From the object side to the image side, the lens assembly 11 may include a first lens, a second lens, a third lens, ..., and an Nth lens, arranged in sequence along the optical axis, where N ≥ 6.

[0111] Among them, the value of the number N of lens assemblies 11 can be: 6≤N≤10, which ensures that the lens assembly 11 has a relatively low total length while being conducive to improving the design freedom of the lens assembly 11, so as to achieve a large aperture and a large target surface design.

[0112] The lens assembly 11 includes N lenses. The lens located at the object-side end of the lens assembly 11 is the first lens. From the object side to the image side, the lens adjacent to the first lens is the second lens. Similarly, the lens located at the image-side end of the lens assembly 11 is the Nth lens. For example, referring to FIG. 2 , assuming that the lens assembly 11 includes six lenses, N = 6. The first lens 111 is located near the object side, and the sixth lens 116 is located near the image side.

[0113] Continuing with FIG. 2 , lens assembly 11 may further include an aperture 118 . This aperture 118 may be located on the object-side of first lens element 111 . Light entering lens assembly 11 may first pass through aperture 118 and then sequentially pass through the six lens elements. Aperture 118 can limit light entering the lens assembly, thereby adjusting light intensity and improving image quality.

[0114] 2 , the lens assembly 11 will be described below by taking an example where the lens assembly 11 includes a first lens 111 , a second lens 112 , a third lens 113 , a fourth lens 114 , a fifth lens 115 and a sixth lens 116 .

[0115] In an embodiment of the present application, the lens module 11 can satisfy the condition: 0.85 ≤ 2×IMH / (TTL×F#) ≤ 1.5, where IMH is the semi-image height of the lens module 11, F# is the f-number of the lens module 11, and TTL is the total length of the lens module 11. When the lens module 11 has a smaller f-number and a larger semi-image height, it can have a smaller total length. At the same time, it meets the design requirements of a large aperture, a large target surface, and a smaller total length of the lens module, that is, it can provide a lens module 11 with a large aperture, a large target surface, and a low total height structure, which is beneficial to the thinning design of the camera module 10 while improving the imaging quality and effect of the camera module 10.

[0116] Moreover, in the above lens module 11, the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 can satisfy the condition: 0.1 < nd2 - nd1 < 0.15, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 can satisfy the condition: 0 < vd1 - vd2 < 40, that is, the refractive index of the second lens 112 is relatively higher than that of the first lens 111, and the second lens 112 can be a lens with a smaller Abbe number (such as less than 30), such as a plastic lens. And the difference between the Abbe number of the first lens 111 and the Abbe number of the second lens 112 is small, and the first lens 111 can also be a lens with a relatively small Abbe number, such as a plastic lens.

[0117] That is to say, the Abbe number of the first lens 111 is greater than the Abbe number of the second lens 112, and both the first lens 111 and the second lens 112 can be lenses with relatively small Abbe numbers, and their material costs are relatively low. For example, both the first lens 111 and the second lens 112 can be plastic lenses, which helps to reduce the cost of the lens module 11, and thus reduces the processing cost of the camera module 10. That is to say, using lenses with relatively low cost and relatively small Abbe numbers for assembly can obtain a lens module 11 that meets the above conditions, achieving the design purpose of a large aperture, a large target surface, and a smaller total length, obtaining a low-cost and high-quality imaging thinning lens module 11, and significantly improving the practicability and processability of the lens module 11.

[0118] Moreover, the Abbe numbers of both the first lens 111 and the second lens 112 are relatively small, and the first lens 111 and the second lens 112 can be thinner and have better performance. While taking into account the performance of a large aperture and a large target surface, it helps to further reduce the thickness of the first lens 111 and the second lens 112, and can further reduce the total length of the lens module 11, which is further beneficial to the thinning of the camera module 10 to obtain an extremely thin camera module 10 with low cost and good imaging quality.

[0119] Among them, the focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 can satisfy the conditional expression: |f3 / f4|>2.5. Specifically, the optical focal length is the reciprocal of the focal length, so that the focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 meet the above conditional expression, and the optical focal length of the third lens 113 and the fourth lens 114 can be reasonably distributed to achieve the purpose of correcting aberrations, reducing imaging aberrations, and thus ensuring the quality of imaging.

[0120] The camera module 10 can be used as the main camera of the electronic device 100 and can meet the performance requirements of the main camera. Of course, in some other examples, the camera module 10 can also be used as a secondary camera on the electronic device 100.

[0121] Among the N lenses of the lens assembly 11, the first lens 111 can have positive optical power, that is, the first lens 111 has the function of converging light, and the second lens 112 can have negative optical power, and the second lens 112 has the function of dispersing light. The combination of the first lens 111 and the second lens 112 can achieve the correction of aberrations, which helps to reduce aberrations and improve imaging quality while reducing the total length.

[0122] At least the portion of the image-side surface of the first lens 111 corresponding to the optical axis may be a concave surface, which can reasonably distribute the optical power of the first lens 111, reduce aberrations, optimize the image quality of the central field of view, and thus improve the imaging quality.

[0123] Among them, the curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 can satisfy the condition: R2 / R3>1.4. This can more reasonably distribute the shapes and arrangement positions of the first lens 111 and the second lens 112, thereby facilitating the processing and assembly of the first lens 111 and the second lens 112.

[0124] The third lens 113 may have negative optical power, and the third lens 113 serves to further disperse the light, that is, the second lens 112 and the third lens 113 jointly serve to correct aberrations, which helps to reduce the difficulty of processing the second lens 112 and facilitates implementation.

[0125] The fourth lens 114 may have positive optical power and is used to correct aberrations introduced by the first lens, the second lens, and the third lens having lower Abbe numbers, thereby improving imaging quality.

[0126] At least the portion of the object-side surface of the third lens 113 corresponding to the optical axis can be a concave surface, and at least the portion of the image-side surface of the third lens 113 corresponding to the optical axis can be a convex surface. This can reasonably distribute the optical focal length of the third lens 113, reduce aberrations, and help improve imaging quality.

[0127] At least a portion of the image side of the fourth lens 114 corresponding to the optical axis is convex, which can reasonably distribute the optical power of the fourth lens 114, reduce aberration, and improve imaging quality.

[0128] Among them, the Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 can satisfy the conditional formula: vd2 + vd3 + vd4 > 92. This allows the second lens 112, the third lens 113, and the fourth lens 114 to also be lenses with relatively small Abbe numbers, and the third lens 113 and the fourth lens 114 can also be plastic lenses. While achieving a large aperture, a large target surface, and a relatively small total length of the lens, the cost of the lens assembly 11 can be further reduced.

[0129] Among them, the Abbe number of the fourth lens 114 can be greater than the Abbe numbers of the second lens 112 and the third lens 113 to ensure the imaging effect and quality. The Abbe number of the second lens 112 can be close to the Abbe number of the third lens 113.

[0130] Among them, the refractive index n4 of the fourth lens 114 can satisfy n4 < 1.69, that is, the refractive index of the fourth lens 114 is relatively small, making the Abbe number of the fourth lens 114 relatively large. That is, the fourth lens 114 can be a plastic lens with a relatively large Abbe number, which is beneficial to improving imaging quality while reducing the cost of the lens assembly 11.

[0131] In the direction of the optical axis L, the distance between the image side of the fourth lens 114 and the object side of the fifth lens 115 is d45, and the value of d45 can be: 0.03 < d45 / TTL < 0.25, which is beneficial to improving the processability of the fourth lens 114 and the fifth lens 115, and at the same time, it is also convenient for the arrangement of the fourth lens 114 and the fifth lens 115, facilitating the assembly and setting of the lens assembly 11 (for example, facilitating the assembly of the lens assembly 11 and the setting of the lens assembly 11 in the lens barrel, etc.).

[0132] Among them, the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 can satisfy the conditional formula: vd3 / vd5 < 1, making the third lens 113 and the fifth lens 115 lenses with relatively low Abbe numbers. The third lens 113 and the fifth lens 115 can also be plastic lenses. Among them, the Abbe number of the fifth lens 115 is greater than the Abbe number of the third lens 113, that is, the fifth lens 115 can be a plastic lens with a relatively large Abbe number, which is helpful to improve imaging quality while reducing the cost of the lens assembly 11.

[0133] The total focal length of the lens assembly 11 is related to the focal lengths of each lens. For example, the total focal length of the lens assembly 11 can satisfy the conditional formula: ∑ i＝1…N|f / fi|>3, where fi is the focal length of the i-th lens, i=1…N. If the lens assembly 11 includes six lenses, the focal length of the lens assembly 11 satisfies:∑ i＝1…6 |f / fi|>3, the optical power of N lenses can be reasonably distributed to achieve the purpose of correcting aberrations and further improve image quality.

[0134] The focal length of the fourth lens 114 and the total focal length f of the lens assembly 11 can satisfy the condition: 0≤f4 / f≤10, so that the optical power of the fourth lens 114 is reasonably distributed, aberrations are reduced, and imaging quality is further improved.

[0135] In an embodiment of the present application, when N=7, that is, the lens assembly 11 includes seven lenses (refer to Figure 19), the seventh lens 117 can be located on the side of the sixth lens 116 facing the image side, that is, along the direction of the optical axis L, the lens assembly 11 includes a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116 and a seventh lens 117 arranged in sequence from the object side to the image side.

[0136] Among them, the seventh lens 117 can be of negative optical power, that is, the seventh lens 117 plays the role of dispersing light, which can further correct the aberration, help to reduce the aberration and improve the imaging quality.

[0137] At least the portion of the object-side surface of the seventh lens 117 corresponding to the optical axis can be a concave surface, and at least the portion of the image-side surface of the seventh lens 117 corresponding to the optical axis can also be a concave surface. This can achieve a reasonable distribution of the optical focal length of the seventh lens 117, thereby reducing aberrations, optimizing the image quality of the central field of view, and thus improving the imaging quality.

[0138] The object side curvature radius R13 of the seventh lens 117 and the total focal length f of the lens assembly 11 can satisfy the condition: 0≤|R13 / f|≤1.8, which is beneficial to improving the processability of the seventh lens 117, and also facilitates the arrangement of the seventh lens 117 and the assembly and setting of the lens assembly 11.

[0139] Among them, the focal length f1 of the first lens 111, the focal length f6 of the sixth lens 116 and the focal length f7 of the seventh lens 117 can satisfy the condition: f1 / (f6+f7)>1.4. This can reasonably distribute the optical focal length, achieve the purpose of correcting aberrations, reduce aberrations, and help further improve the quality of imaging.

[0140] The structure and performance of the lens assembly 11 provided in this application are described below in conjunction with specific embodiments.

[0141] Example 1

[0142] FIG3 is a schematic diagram of a simulation structure of a camera module provided in Example 1 of the present application.

[0143] In the embodiment of the present application, as shown in Figure 3, the lens assembly 11 includes 6 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115 and a sixth lens 116. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115 and the sixth lens 116 are all plastic lenses.

[0144] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=0.98.

[0145] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0146] The refractive index nd1 of the first lens 111 is 1.55, the refractive index nd2 of the second lens 112 is 1.68, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.13.

[0147] The Abbe number vd1 of the first lens 111 is 56.14, the Abbe number vd2 of the second lens 112 is 19.25, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=36.89.

[0148] The focal length f1 of the first lens 111 is 4.91 mm.

[0149] The focal length of the second lens 112 is f2 = -12.59 mm.

[0150] The curvature radius R2 of the image side of the first lens 111 is 12.32 mm, and the curvature radius R3 of the object side of the second lens 112 is 7.26 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=1.7.

[0151] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0152] The curvature radius R5 of the object side of the third lens 113 is -7.99 mm.

[0153] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0154] The focal length f3 of the third lens 113 is -1118.68 mm, and the focal length f4 of the fourth lens 114 is 15.36 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=72.81.

[0155] The total focal length f of the lens assembly 11 is 5.39, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=2.85.

[0156] The refractive index of the fourth lens 114 is nd4=1.55.

[0157] The Abbe number vd2 of the second lens 112 is 19.25, the Abbe number vd3 of the third lens 113 is 19.25, and the Abbe number vd4 of the fourth lens 114 is 56.14. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=94.63.

[0158] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.71, the total length TTL of the lens assembly 11 is 6.2, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.12.

[0159] The Abbe number vd3 of the third lens 113 is 19.25, the Abbe number vd5 of the fifth lens 115 is 20.35, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.95.

[0160] At least the portion of the image-side surface of the sixth lens element 116 corresponding to the optical axis is a concave surface, and the focal length f6 of the sixth lens element 116 is -5.18 mm.

[0161] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=3.13, i=1…6.

[0162] Table 1 below shows the optical parameters of each optical element in a camera module provided in Example 1 of the present application.

[0163] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, S1 is the aperture 118, and IR is the filter 12.

[0164] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at the corresponding position on the optical axis. R0 is the radius of curvature of the aperture 118, R1 and R2 are the radii of curvature of the first lens 111 on the object side and image side, respectively, R3 and R4 are the radii of curvature of the second lens 112 on the object side and image side, respectively, R5 and R6 are the radii of curvature of the third lens 113 on the object side and image side, respectively, R7 and R8 are the radii of curvature of the fourth lens 114 on the object side and image side, respectively, R9 and R10 are the radii of curvature of the fifth lens 115 on the object side and image side, respectively, R11 and R12 are the radii of curvature of the sixth lens 116 on the object side and image side, respectively, and R13 and R14 are the radii of curvature of the filter 12 on the object side and image side, respectively.

[0165] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. d0 is the distance from the aperture 118 to the object side of the first lens 111 along the optical axis, d1 is the thickness of the first lens 111 along the optical axis, d2 is the distance from the image side of the first lens 111 to the object side of the second lens 112 along the optical axis, d3 is the thickness of the second lens 112 along the optical axis, d4 is the distance from the image side of the second lens 112 to the object side of the third lens 113 along the optical axis, d5 is the thickness of the third lens 113 along the optical axis, d6 is the distance from the image side of the third lens 113 to the object side of the fourth lens 114 along the optical axis, and d7 is the distance from the image side of the fourth lens 114 along the optical axis. The thickness along the optical axis is as follows: d8 is the distance from the image side of the fourth lens 114 to the object side of the fifth lens 115 along the optical axis, d9 is the thickness of the fifth lens 115 along the optical axis, d10 is the distance from the image side of the fifth lens 115 to the object side of the sixth lens 116 along the optical axis, d11 is the thickness of the sixth lens 116 along the optical axis, d12 is the distance from the image side of the sixth lens 116 to the object side of the filter 12 along the optical axis, d13 is the thickness of the filter along the optical axis, and d14 is the distance from the image side of the filter 12 to the photosensitive surface of the image sensor 13 along the optical axis.

[0166] nd is the refractive index of each optical element when the d-line is irradiated, where the d-line can be green light with a wavelength of 550 nm. nd1 is the refractive index of the d-line of the first lens element 111, nd2 is the refractive index of the d-line of the second lens element 112, nd3 is the refractive index of the d-line of the third lens element 113, nd4 is the refractive index of the d-line of the fourth lens element 114, nd5 is the refractive index of the d-line of the fifth lens element 115, nd6 is the refractive index of the d-line of the sixth lens element 116, and ndg is the refractive index of the d-line of the filter 12.

[0167] vd is the Abbe number of the optical element. vd1 is the Abbe number of the first lens 111, vd2 is the Abbe number of the second lens 112, vd3 is the Abbe number of the third lens 113, vd4 is the Abbe number of the fourth lens 114, vd5 is the Abbe number of the fifth lens 115, vd6 is the Abbe number of the sixth lens 116, and vdg is the Abbe number of the filter 12.

[0168] Table 2 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 1 of the present application.

[0169] As can be seen from Table 2, each lens in the lens assembly 11 is an aspherical lens, that is, the lens assembly 11 includes 12 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0170] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients, and each lens can be simulated according to the obtained aspheric surface shape to finally obtain the camera module 10 shown in Figure 3.

[0171] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 3 below.

[0172] Table 3 shows the optical parameters of a lens assembly provided in Example 1 of the present application.

[0173] As can be seen from Table 3, the lens assembly 11 provided in the first embodiment of the present application has the characteristics of a large aperture and a large target surface, and has a relatively small total length.

[0174] FIG4 is a graph showing axial chromatic aberration of a lens assembly provided in Example 1 of the present application. The axial chromatic aberration illustrated in FIG4 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. The abscissa represents the magnitude of spherical aberration, and the ordinate represents the normalized aperture. FIG4 shows that the axial chromatic aberration of light after passing through lens assembly 11 is relatively small.

[0175] Figure 5 is a graph of astigmatism field curvature for a lens assembly provided in Example 1 of the present application. Figure 5 shows the astigmatism field curvature for light with a wavelength of 555 nm after passing through lens assembly 11. S represents the field curvature in the sagittal direction, and T represents the field curvature in the meridional direction. The abscissa represents the magnitude of the field curvature, the lateral distance between T and S represents the magnitude of the astigmatism, and the ordinate represents the field of view. As shown in Figure 5 , lens assembly 11 exhibits low field curvature in both the sagittal and meridional directions, demonstrating high imaging quality.

[0176] Figure 6 is a distortion curve diagram for a lens assembly provided in Example 1 of the present application. Figure 6 shows the distortion curve for light with a wavelength of 555 nm after passing through lens assembly 11, with the horizontal axis representing the distortion magnitude and the vertical axis representing the field of view. As can be seen from Figure 6 , the amount of distortion imaged by lens assembly 11 is minimal, and the image shape differs little from the ideal shape, meeting the distortion difference requirement and achieving high image quality.

[0177] Example 2

[0178] FIG7 is a schematic diagram of a simulation structure of a camera module provided in Example 2 of the present application.

[0179] In the embodiment of the present application, as shown in Figure 7, the lens assembly 11 includes 6 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115 and a sixth lens 116. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115 and the sixth lens 116 are all plastic lenses.

[0180] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=1.01.

[0181] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0182] The refractive index nd1 of the first lens 111 is 1.55, the refractive index nd2 of the second lens 112 is 1.68, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.13.

[0183] The Abbe number vd1 of the first lens 111 is 56.14, the Abbe number vd2 of the second lens 112 is 19.25, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=36.89.

[0184] The focal length f1 of the first lens 111 is 5.42 mm.

[0185] The focal length of the second lens 112 is f2 = -14.85 mm.

[0186] The curvature radius R2 of the image side of the first lens 111 is 14.21 mm, and the curvature radius R3 of the object side of the second lens 112 is 7.56 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=1.88.

[0187] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0188] The curvature radius R5 of the object side of the third lens 113 is -8.89 mm.

[0189] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0190] The focal length f3 of the third lens 113 is -249.89 mm, and the focal length f4 of the fourth lens 114 is 13.34 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=18.73.

[0191] The total focal length f of the lens assembly 11 is 5.40, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=2.47.

[0192] The refractive index of the fourth lens 114 is nd4=1.55.

[0193] The Abbe number vd2 of the second lens 112 is 19.25, the Abbe number vd3 of the third lens 113 is 19.25, and the Abbe number vd4 of the fourth lens 114 is 56.14. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=94.63.

[0194] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.68, the total length TTL of the lens assembly 11 is 6.57, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.10.

[0195] The Abbe number vd3 of the third lens 113 is 19.25, the Abbe number vd5 of the fifth lens 115 is 20.35, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.95.

[0196] At least the portion of the image-side surface of the sixth lens element 116 corresponding to the optical axis is a concave surface, and the focal length f6 of the sixth lens element 116 is -5.51 mm.

[0197] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=3.00, i=1…6.

[0198] Table 4 below shows the optical parameters of each optical element in a camera module provided in Example 2 of the present application.

[0199] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, S1 is the aperture 118, and IR is the filter 12.

[0200] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at a position corresponding to the optical axis. The specific meanings of R0, R1, ..., R14 can be found in Example 1 and will not be repeated in this embodiment.

[0201] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. The specific meanings of d0, d1, ..., d14 can be found in Example 1 and will not be repeated in this embodiment.

[0202] nd is the refractive index of each optical element when d-ray is irradiated. The specific meanings of nd1, nd2, ..., ndg can be found in Example 1 and will not be repeated in the examples of this application.

[0203] vd is the Abbe number of the optical element. The specific meanings of vd1, vd2, ..., and vdg can be found in Example 1 and will not be repeated in this embodiment.

[0204] Table 5 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 2 of the present application.

[0205] As shown in Table 5, each lens in the lens assembly 11 is an aspherical lens, that is, the lens assembly 11 includes 12 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0206] Among them, z is the aspheric height, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients, and each lens can be simulated according to the obtained aspheric surface shape to finally obtain the camera module 10 shown in Figure 7.

[0207] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 6 below.

[0208] Table 6 shows the optical parameters of a lens assembly provided in Example 2 of the present application.

[0209] It can be seen from Table 6 that the lens assembly 11 provided in the second embodiment of the present application has the characteristics of a large aperture and a large target surface, and has a relatively small total length.

[0210] FIG8 is a graph showing axial chromatic aberration of a lens assembly provided in Example 2 of the present application. The axial chromatic aberration illustrated in FIG8 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. FIG8 shows that the axial chromatic aberration is relatively small after light passes through lens assembly 11.

[0211] Figure 9 is an astigmatism field curvature diagram of a lens assembly provided in Example 2 of the present application, wherein Figure 9 shows the astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the lens assembly 11. As can be seen from Figure 9, the field curvature of the lens assembly 11 in both the sagittal and tangential directions is small, and has high imaging quality.

[0212] Figure 10 is a distortion curve diagram of a lens assembly provided in Example 2 of the present application, wherein Figure 10 shows the distortion curve of light with a wavelength of 555nm after passing through the lens assembly 11. As can be seen from Figure 10, the distortion amount of the image formed by the lens assembly 11 is small, and the difference between the image shape and the ideal shape is small, which meets the deformation difference requirement and has high imaging quality.

[0213] Example 3

[0214] FIG11 is a schematic diagram of a simulation structure of a camera module provided in Example 3 of the present application.

[0215] In the embodiment of the present application, as shown in Figure 11, the lens assembly 11 includes 6 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115 and a sixth lens 116. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115 and the sixth lens 116 are all plastic lenses.

[0216] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=0.95.

[0217] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0218] The refractive index nd1 of the first lens 111 is 1.54, the refractive index nd2 of the second lens 112 is 1.69, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.15.

[0219] The Abbe number vd1 of the first lens 111 is 56.00, the Abbe number vd2 of the second lens 112 is 18.07, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=37.93.

[0220] The focal length f1 of the first lens 111 is 4.58 mm.

[0221] The focal length of the second lens 112 is f2 = -14.15 mm.

[0222] The curvature radius R2 of the image side of the first lens 111 is 9.80 mm, and the curvature radius R3 of the object side of the second lens 112 is 6.95 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=1.41.

[0223] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0224] The curvature radius R5 of the object side of the third lens 113 is -5.74 mm.

[0225] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0226] The focal length f3 of the third lens 113 is -162.75 mm, and the focal length f4 of the fourth lens 114 is 19.62 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=8.3.

[0227] The total focal length f of the lens assembly 11 is 5.35, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=3.67.

[0228] The refractive index of the fourth lens 114 is nd4=1.55.

[0229] The Abbe number vd2 of the second lens 112 is 18.07, the Abbe number vd3 of the third lens 113 is 18.07, and the Abbe number vd4 of the fourth lens 114 is 55.96. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=92.10.

[0230] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.70, the total length TTL of the lens assembly 11 is 5.79, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.12.

[0231] The Abbe number vd3 of the third lens 113 is 18.07, the Abbe number vd5 of the fifth lens 115 is 44.88, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.40.

[0232] At least the portion of the image-side surface of the sixth lens element 116 corresponding to the optical axis is a concave surface, and the focal length f6 of the sixth lens element 116 is -4.90 mm.

[0233] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=3.17, i=1…6.

[0234] Table 7 below shows the optical parameters of each optical element in a camera module provided in Example 3 of the present application.

[0235] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, S1 is the aperture 118, and IR is the filter 12.

[0236] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at a position corresponding to the optical axis. The specific meanings of R0, R1, ..., R14 can be found in Example 1 and will not be repeated in this embodiment.

[0237] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. The specific meanings of d0, d1, ..., d14 can be found in Example 1 and will not be repeated in this embodiment.

[0238] nd is the refractive index of each optical element when d-ray is irradiated. The specific meanings of nd1, nd2, ..., ndg can be found in Example 1 and will not be repeated in the examples of this application.

[0239] vd is the Abbe number of the optical element. The specific meanings of vd1, vd2, ..., and vdg can be found in Example 1 and will not be repeated in this embodiment.

[0240] Table 8 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 3 of the present application.

[0241] As shown in Table 8, each lens in the lens assembly 11 is an aspherical lens, that is, the lens assembly 11 includes 12 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0242] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients, and each lens can be simulated according to the obtained aspheric surface shape to finally obtain the camera module 10 shown in Figure 11.

[0243] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 6 below.

[0244] Table 9 shows the optical parameters of a lens assembly provided in Example 3 of the present application.

[0245] It can be seen from Table 9 that the lens assembly 11 provided in the third embodiment of the present application has the characteristics of large aperture and large target surface, and has a relatively small total length.

[0246] FIG12 is a graph showing axial chromatic aberration of a lens assembly provided in Example 3 of the present application. The axial chromatic aberration illustrated in FIG12 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. FIG12 shows that the axial chromatic aberration is relatively small after light passes through lens assembly 11.

[0247] Figure 13 is an astigmatism field curvature diagram of a lens assembly provided in Example 3 of the present application, wherein Figure 13 shows the astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the lens assembly 11. As can be seen from Figure 13, the field curvature of the lens assembly 11 in both the sagittal and tangential directions is small, and has high imaging quality.

[0248] Figure 14 is a distortion curve diagram of a lens assembly provided in Example 3 of the present application, wherein Figure 14 shows the distortion curve of light with a wavelength of 555nm after passing through the lens assembly 11. It can be seen from Figure 14 that the distortion amount of the image formed by the lens assembly 11 is small, and the difference between the image shape and the ideal shape is small, which meets the deformation difference requirement and has high imaging quality.

[0249] Example 4

[0250] FIG15 is a schematic diagram of a simulation structure of a camera module provided in Example 4 of the present application.

[0251] In the embodiment of the present application, as shown in Figure 15, the lens assembly 11 includes 6 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115 and a sixth lens 116. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115 and the sixth lens 116 are all plastic lenses.

[0252] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=1.00.

[0253] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0254] The refractive index nd1 of the first lens 111 is 1.54, and the refractive index nd2 of the second lens 112 is 1.69. The refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.14.

[0255] The Abbe number vd1 of the first lens 111 is 56.00, the Abbe number vd2 of the second lens 112 is 18.51, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=37.49.

[0256] The focal length f1 of the first lens 111 is 4.78 mm.

[0257] The focal length of the second lens 112 is f2 = -16.03 mm.

[0258] The curvature radius R2 of the image side of the first lens 111 is 10.30 mm, and the curvature radius R3 of the object side of the second lens 112 is 6.41 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=1.61.

[0259] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0260] The radius of curvature of the object side of the third lens 113 is R5 = -6.74 mm.

[0261] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0262] The focal length f3 of the third lens 113 is -514.96 mm, and the focal length f4 of the fourth lens 114 is 21.41 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=24.06.

[0263] The total focal length f of the lens assembly 11 is 5.35, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=4.00.

[0264] The refractive index of the fourth lens 114 is nd4=1.55.

[0265] The Abbe number vd2 of the second lens 112 is 18.51, the Abbe number vd3 of the third lens 113 is 18.21, and the Abbe number vd4 of the fourth lens 114 is 55.96. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=92.68.

[0266] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.66, the total length TTL of the lens assembly 11 is 5.78, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.11.

[0267] The Abbe number vd3 of the third lens 113 is 18.21, the Abbe number vd5 of the fifth lens 115 is 56.00, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.33.

[0268] At least the portion of the image-side surface of the sixth lens element 116 corresponding to the optical axis is a concave surface, and the focal length f6 of the sixth lens element 116 is -4.42 mm.

[0269] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=3.24, i=1…6.

[0270] Table 10 below shows the optical parameters of each optical element in a camera module provided in Example 4 of the present application.

[0271] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, S1 is the aperture 118, and IR is the filter 12.

[0272] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at a position corresponding to the optical axis. The specific meanings of R0, R1, ..., R14 can be found in Example 1 and will not be repeated in this embodiment.

[0273] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. The specific meanings of d0, d1, ..., d14 can be found in Example 1 and will not be repeated in this embodiment.

[0274] nd is the refractive index of each optical element when d-ray is irradiated. The specific meanings of nd1, nd2, ..., ndg can be found in Example 1 and will not be repeated in the examples of this application.

[0275] vd is the Abbe number of the optical element. The specific meanings of vd1, vd2, ..., and vdg can be found in Example 1 and will not be repeated in this embodiment.

[0276] Table 11 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 4 of the present application.

[0277] As can be seen from Table 11, each lens in the lens assembly 11 is an aspherical lens, that is, the lens assembly 11 includes 12 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0278] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients, and each lens can be simulated according to the obtained aspheric surface shape to finally obtain the camera module 10 shown in Figure 15.

[0279] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 12 below.

[0280] Table 12 shows the optical parameters of a lens assembly provided in Example 4 of the present application.

[0281] It can be seen from Table 12 that the lens assembly 11 provided in the fourth embodiment of the present application has the characteristics of large aperture and large target surface, and has a relatively small total length.

[0282] FIG16 is a graph showing axial chromatic aberration of a lens assembly provided in Example 4 of the present application. The axial chromatic aberration illustrated in FIG16 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. FIG16 shows that the axial chromatic aberration is relatively small after light passes through lens assembly 11.

[0283] Figure 17 is an astigmatism field curvature diagram of a lens assembly provided in Example 4 of the present application, wherein Figure 17 shows the astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the lens assembly 11. It can be seen from Figure 17 that the field curvature of the lens assembly 11 in both the sagittal and tangential directions is small, and has high imaging quality.

[0284] Figure 18 is a distortion curve diagram of a lens assembly provided in Example 4 of the present application, wherein Figure 18 shows the distortion curve of light with a wavelength of 555nm after passing through the lens assembly 11. It can be seen from Figure 18 that the distortion amount of the image formed by the lens assembly 11 is small, and the difference between the image shape and the ideal shape is small, which meets the deformation difference requirements and has high imaging quality.

[0285] Example 5

[0286] FIG19 is a schematic diagram of a simulation structure of a camera module provided in Example 5 of the present application.

[0287] In the embodiment of the present application, referring to FIG19 , the lens assembly 11 includes N=7 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116, and a seventh lens 117. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115, the sixth lens 116, and the seventh lens 117 are all plastic lenses.

[0288] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=1.00.

[0289] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0290] The refractive index nd1 of the first lens 111 is 1.55, the refractive index nd2 of the second lens 112 is 1.67, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.12.

[0291] The Abbe number vd1 of the first lens 111 is 55.92, the Abbe number vd2 of the second lens 112 is 20.37, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=35.55.

[0292] The focal length f1 of the first lens 111 is 4.81 mm.

[0293] The focal length of the second lens 112 is f2 = -11.60 mm.

[0294] The curvature radius R2 of the image side of the first lens 111 is 17.86 mm, and the curvature radius R3 of the object side of the second lens 112 is 6.18 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=2.89.

[0295] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0296] The curvature radius R5 of the object side of the third lens 113 is -39.13 mm.

[0297] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0298] The focal length f3 of the third lens 113 is -8674.79 mm, and the focal length f4 of the fourth lens 114 is 31.98 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=271.24.

[0299] The total focal length f of the lens assembly 11 is 5.35, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=5.98.

[0300] The refractive index of the fourth lens 114 is nd4=1.55.

[0301] The Abbe number vd2 of the second lens 112 is 20.37, the Abbe number vd3 of the third lens 113 is 19.24, and the Abbe number vd4 of the fourth lens 114 is 55.92. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=95.53.

[0302] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.56, the total length TTL of the lens assembly 11 is 6.20, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.09.

[0303] The Abbe number vd3 of the third lens 113 is 19.24, the Abbe number vd5 of the fifth lens 115 is 37.40, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.51.

[0304] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=4.05, i=1…6.

[0305] The seventh lens element 117 has negative optical power. At least a portion of the object-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface. At least a portion of the image-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface.

[0306] The object-side curvature radius R13 of the seventh lens element 117 is -7.44 mm, and the image-side curvature radius R14 of the seventh lens element 117 is 2.69 mm. The total focal length f of the lens assembly 11 is 5.35, and the object-side curvature radius R13 of the seventh lens element 117 and the total focal length f of the lens assembly 11 satisfy the following relationship: |R13 / f|=1.39.

[0307] The focal length f1 of the first lens 111 is 4.81 mm, the focal length f6 of the sixth lens 116 is 7.04 mm, and the focal length f7 of the seventh lens 117 is -3.63 mm. The focal length f1 of the first lens 111, the focal length f6 of the sixth lens 116, and the focal length f7 of the seventh lens 117 satisfy: f1 / (f6+f7)=1.41.

[0308] Table 13 below shows the optical parameters of each optical element in a camera module provided in Example 5 of the present application.

[0309] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, L7 is the seventh lens 117, S1 is the aperture 118, and IR is the filter 12.

[0310] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at the corresponding position on the optical axis. R0 is the radius of curvature of the aperture 118, R1 and R2 are the radii of curvature of the first lens 111 on the object side and image side, respectively, R3 and R4 are the radii of curvature of the second lens 112 on the object side and image side, respectively, R5 and R6 are the radii of curvature of the third lens 113 on the object side and image side, respectively, R7 and R8 are the radii of curvature of the fourth lens 114 on the object side and image side, respectively, R9 and R10 are the radii of curvature of the fifth lens 115 on the object side and image side, respectively, R11 and R12 are the radii of curvature of the sixth lens 116 on the object side and image side, respectively, R13 and R14 are the radii of curvature of the seventh lens 117 on the object side and image side, respectively, and R15 and R16 are the radii of curvature of the filter 12 on the object side and image side, respectively.

[0311] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. d0 is the distance from the aperture 118 to the object side of the first lens 111 along the optical axis, d1 is the thickness of the first lens 111 along the optical axis, d2 is the distance from the image side of the first lens 111 to the object side of the second lens 112 along the optical axis, d3 is the thickness of the second lens 112 along the optical axis, d4 is the distance from the image side of the second lens 112 to the object side of the third lens 113 along the optical axis, d5 is the thickness of the third lens 113 along the optical axis, d6 is the distance from the image side of the third lens 113 to the object side of the fourth lens 114 along the optical axis, d7 is the thickness of the fourth lens 114 along the optical axis, and d8 is the distance from the image side of the fourth lens 114 to the fifth lens 114. d15 is the distance from the image side of the seventh lens 117 to the object side of the filter 12 along the optical axis, d16 is the distance from the image side of the filter 12 to the photosensitive surface of the image sensor 13 along the optical axis.

[0312] nd is the refractive index of the d-line irradiated to each optical element, where the d-line can be green light with a wavelength of 550 nm. nd1 is the refractive index of the d-line of the first lens 111, nd2 is the refractive index of the d-line of the second lens 112, nd3 is the refractive index of the d-line of the third lens 113, nd4 is the refractive index of the d-line of the fourth lens 114, nd5 is the refractive index of the d-line of the fifth lens 115, nd6 is the refractive index of the d-line of the sixth lens 116, nd7 is the refractive index of the d-line of the seventh lens 117, and ndg is the refractive index of the d-line of the filter 12.

[0313] vd is the Abbe number of the optical element. vd1 is the Abbe number of the first lens 111, vd2 is the Abbe number of the second lens 112, vd3 is the Abbe number of the third lens 113, vd4 is the Abbe number of the fourth lens 114, vd5 is the Abbe number of the fifth lens 115, vd6 is the Abbe number of the sixth lens 116, vd7 is the Abbe number of the seventh lens 117, and vdg is the Abbe number of the filter 12.

[0314] Table 14 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 5 of the present application.

[0315] As can be seen from Table 14, each lens in the lens assembly 11 is an aspherical lens, that is, the lens assembly 11 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0316] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients. According to the obtained aspheric surface shape, each lens can be simulated to finally obtain the camera module 10 shown in Figure 19.

[0317] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 15 below.

[0318] Table 15 shows the optical parameters of a lens assembly provided in Example 5 of the present application.

[0319] It can be seen from Table 15 that the lens assembly 11 provided in the fifth embodiment of the present application has the characteristics of large aperture and large target surface, and has a relatively small total length.

[0320] FIG20 is a graph showing axial chromatic aberration of a lens assembly provided in Example 5 of the present application. The axial chromatic aberration illustrated in FIG20 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. The abscissa represents the magnitude of spherical aberration, and the ordinate represents the normalized aperture. FIG20 shows that the axial chromatic aberration of light after passing through lens assembly 11 is relatively small.

[0321] Figure 21 is a graph of astigmatism field curvature for a lens assembly provided in Example 5 of the present application. Figure 21 shows the astigmatism field curvature for light with a wavelength of 555 nm after passing through lens assembly 11. S represents the field curvature in the sagittal direction, and T represents the field curvature in the meridional direction. The abscissa represents the magnitude of the field curvature, the lateral distance between T and S represents the magnitude of the astigmatism, and the ordinate represents the field of view. As shown in Figure 21, lens assembly 11 exhibits low field curvature in both the sagittal and meridional directions, demonstrating high imaging quality.

[0322] Figure 22 is a distortion curve diagram for a lens assembly provided in Example 5 of the present application. Figure 22 shows the distortion curve for light with a wavelength of 555 nm after passing through lens assembly 11, with the horizontal axis representing the distortion magnitude and the vertical axis representing the field of view. As can be seen from Figure 22, the distortion of the image formed by lens assembly 11 is minimal, and the image shape differs little from the ideal shape, meeting the distortion difference requirement and achieving high image quality.

[0323] Example 6

[0324] Figure 23 is a schematic diagram of the simulation structure of a camera module provided in Example 6 of the present application.

[0325] In the embodiment of the present application, as shown in Figure 23, the lens assembly 11 includes a number N=7 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: the first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115, the sixth lens 116 and the seventh lens 117. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115, the sixth lens 116 and the seventh lens 117 are all plastic lenses.

[0326] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=0.90.

[0327] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0328] The refractive index nd1 of the first lens 111 is 1.55, the refractive index nd2 of the second lens 112 is 1.68, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.13.

[0329] The Abbe number vd1 of the first lens 111 is 55.92, the Abbe number vd2 of the second lens 112 is 19.24, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=36.69.

[0330] The focal length f1 of the first lens 111 is 4.59 mm.

[0331] The focal length of the second lens 112 is f2 = -11.21 mm.

[0332] The curvature radius R2 of the image side of the first lens 111 is 16.89 mm, and the curvature radius R3 of the object side of the second lens 112 is 6.46 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=2.61.

[0333] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0334] The curvature radius R5 of the object side of the third lens 113 is -19.68 mm.

[0335] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0336] The focal length f3 of the third lens 113 is -132.48 mm, and the focal length f4 of the fourth lens 114 is 30.46 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=4.35.

[0337] The total focal length f of the lens assembly 11 is 5.30, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=5.75.

[0338] The refractive index of the fourth lens 114 is nd4=1.55.

[0339] The Abbe number vd2 of the second lens 112 is 19.21, the Abbe number vd3 of the third lens 113 is 19.24, and the Abbe number vd4 of the fourth lens 114 is 55.92. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=94.40.

[0340] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.53, the total length TTL of the lens assembly 11 is 6.10, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.09.

[0341] The Abbe number vd3 of the third lens 113 is 19.24, the Abbe number vd5 of the fifth lens 115 is 37.40, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.51.

[0342] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=4.07, i=1…6.

[0343] The seventh lens element 117 has negative optical power. At least a portion of the object-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface. At least a portion of the image-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface.

[0344] The object-side curvature radius R13 of the seventh lens element 117 is -6.94 mm, and the image-side curvature radius R14 of the seventh lens element 117 is 2.81 mm. The total focal length f of the lens assembly 11 is 5.30, and the object-side curvature radius R13 of the seventh lens element 117 and the total focal length f of the lens assembly 11 satisfy the following relationship: |R13 / f|=1.31.

[0345] The focal length f1 of the first lens 111 is 4.59 mm, the focal length f6 of the sixth lens 116 is 6.92 mm, and the focal length f7 of the seventh lens 117 is -3.67 mm. The focal length f1 of the first lens 111, the focal length f6 of the sixth lens 116, and the focal length f7 of the seventh lens 117 satisfy: f1 / (f6+f7)=1.41.

[0346] Table 16 below shows the optical parameters of each optical element in a camera module provided in Example 6 of the present application.

[0347] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, L7 is the seventh lens 117, S1 is the aperture 118, and IR is the filter 12.

[0348] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at a position corresponding to the optical axis. The specific meanings of R0, R1, ..., R16 can be found in Example 5 and will not be repeated in this embodiment.

[0349] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. The specific meanings of d0, d1, ..., d16 can be found in Example 5 and will not be repeated in this embodiment.

[0350] nd is the refractive index of each optical element when d-ray is irradiated. The specific meanings of nd1, nd2, ..., ndg can be found in Example 5 and will not be repeated in the embodiments of this application.

[0351] vd is the Abbe number of the optical element. The specific meanings of vd1, vd2, ..., and vdg can be found in Example 5 and will not be repeated in this embodiment.

[0352] Table 17 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 6 of the present application.

[0353] As can be seen from Table 17, all lenses in the lens assembly 11 are aspherical lenses, that is, the lens assembly 11 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0354] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients. According to the obtained aspheric surface shape, each lens can be simulated to finally obtain the camera module 10 shown in Figure 23.

[0355] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 18 below.

[0356] Table 18 shows the optical parameters of a lens assembly provided in Example 6 of the present application.

[0357] It can be seen from Table 18 that the lens assembly 11 provided in Example 6 of the present application has the characteristics of large aperture and large target surface, and has a relatively small total length.

[0358] FIG24 is a graph showing axial chromatic aberration of a lens assembly provided in Example 6 of the present application. The axial chromatic aberration illustrated in FIG24 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. FIG24 shows that the axial chromatic aberration is relatively small after light passes through lens assembly 11.

[0359] Figure 25 is a graph of astigmatism field curvature for a lens assembly provided in Example 6 of the present application. Figure 25 shows the astigmatism field curvature graph for light with a wavelength of 555 nm after passing through lens assembly 11. As can be seen from Figure 25 , lens assembly 11 exhibits low field curvature in both the sagittal and tangential directions, demonstrating high imaging quality.

[0360] Figure 26 is a distortion curve diagram of a lens assembly provided in Example 6 of the present application. Figure 26 shows the distortion curve for light with a wavelength of 555 nm after passing through lens assembly 11. As can be seen from Figure 26, the amount of distortion in the image formed by lens assembly 11 is small, and the image shape differs little from the ideal shape, meeting the distortion difference requirement and achieving high image quality.

[0361] Example 7

[0362] Figure 27 is a schematic diagram of the simulation structure of a camera module provided in Example 7 of the present application.

[0363] In the embodiment of the present application, as shown in Figure 27, the lens assembly 11 includes a number N=7 lenses, which are arranged along the direction of the optical axis L, from the object side to the image side, in order: a first lens 111, a second lens 112, a third lens 113, a fourth lens 114, a fifth lens 115, a sixth lens 116 and a seventh lens 117. The first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the fifth lens 115, the sixth lens 116 and the seventh lens 117 are all plastic lenses.

[0364] The half-image height IMH of the lens assembly 11 , the total length TTL of the lens assembly 11 , and the aperture number F# of the lens assembly 11 satisfy: 2×IMH / (TTL×F#)=0.94.

[0365] The first lens 111 has positive refractive power, and at least a portion of the image-side surface of the first lens 111 corresponding to the optical axis is a concave surface. The second lens 112 has negative refractive power.

[0366] The refractive index nd1 of the first lens 111 is 1.55, the refractive index nd2 of the second lens 112 is 1.69, and the refractive index nd1 of the first lens 111 and the refractive index nd2 of the second lens 112 satisfy: nd2-nd1=0.14.

[0367] The Abbe number vd1 of the first lens 111 is 65.10, the Abbe number vd2 of the second lens 112 is 31.22, and the Abbe number vd1 of the first lens 111 and the Abbe number vd2 of the second lens 112 satisfy: vd1-vd2=33.88.

[0368] The focal length f1 of the first lens 111 is 4.61 mm.

[0369] The focal length of the second lens 112 is f2 = -10.51 mm.

[0370] The curvature radius R2 of the image side of the first lens 111 is 19.68 mm, and the curvature radius R3 of the object side of the second lens 112 is 6.546 mm. The curvature radius R2 of the image side of the first lens 111 and the curvature radius R3 of the object side of the second lens 112 satisfy: R2 / R3=3.01.

[0371] The third lens 113 has negative optical power. At least a portion of the object-side surface of the third lens 113 corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the third lens 113 corresponding to the optical axis is a convex surface.

[0372] The curvature radius R5 of the object side of the third lens 113 is -26.91 mm.

[0373] The fourth lens 114 has positive refractive power, and at least a portion of the image-side surface of the fourth lens 114 corresponding to the optical axis is a convex surface.

[0374] The focal length f3 of the third lens 113 is -169.03 mm, and the focal length f4 of the fourth lens 114 is 26.26 mm. The focal length f3 of the third lens 113 and the focal length f4 of the fourth lens 114 satisfy: |f3 / f4|=6.44.

[0375] The total focal length f of the lens assembly 11 is 5.32, and the focal length f4 of the fourth lens element 114 and the total focal length f of the lens assembly 11 satisfy: f4 / f=4.93.

[0376] The refractive index of the fourth lens 114 is nd4=1.55.

[0377] The Abbe number vd2 of the second lens 112 is 31.22, the Abbe number vd3 of the third lens 113 is 31.90, and the Abbe number vd4 of the fourth lens 114 is 55.92. The Abbe number vd2 of the second lens 112, the Abbe number vd3 of the third lens 113, and the Abbe number vd4 of the fourth lens 114 satisfy: vd2+vd3+vd4=119.04.

[0378] The distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction is 0.56, the total length TTL of the lens assembly 11 is 6.20, and the distance d45 from the image side surface of the fourth lens 114 to the object side surface of the fifth lens 115 in the optical axis direction satisfies: d45 / TTL=0.09.

[0379] The Abbe number vd3 of the third lens 113 is 31.90, the Abbe number vd5 of the fifth lens 115 is 41.83, and the Abbe number vd3 of the third lens 113 and the Abbe number vd5 of the fifth lens 115 satisfy: vd3 / vd5=0.76.

[0380] The focal length fi of each lens and the total focal length of the lens assembly 11 satisfy: ∑|f / fi|=4.11, i=1…6.

[0381] The seventh lens element 117 has negative optical power. At least a portion of the object-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface. At least a portion of the image-side surface of the seventh lens element 117 corresponding to the optical axis is a concave surface.

[0382] The object-side curvature radius R13 of the seventh lens element 117 is -7.50 mm, and the image-side curvature radius R14 of the seventh lens element 117 is 2.87 mm. The total focal length f of the lens assembly 11 is 5.32. The object-side curvature radius R13 of the seventh lens element 117 and the total focal length f of the lens assembly 11 satisfy the following relationship: |R13 / f|=1.41.

[0383] The focal length f1 of the first lens 111 is 4.61 mm, the focal length f6 of the sixth lens 116 is 7.09 mm, and the focal length f7 of the seventh lens 117 is -3.82 mm. The focal length f1 of the first lens 111, the focal length f6 of the sixth lens 116, and the focal length f7 of the seventh lens 117 satisfy: f1 / (f6+f7)=1.41.

[0384] Table 19 below shows the optical parameters of each optical element in a camera module provided in Example 7 of the present application.

[0385] Among them, L1 is the first lens 111, L2 is the second lens 112, L3 is the third lens 113, L4 is the fourth lens 114, L5 is the fifth lens 115, L6 is the sixth lens 116, L7 is the seventh lens 117, S1 is the aperture 118, and IR is the filter 12.

[0386] R is the radius of curvature of an optical element (such as a lens, filter, etc.) at a position corresponding to the optical axis. The specific meanings of R0, R1, ..., R16 can be found in Example 5 and will not be repeated in this embodiment.

[0387] d is the thickness of the optical element along the optical axis or the thickness of the air gap between optical elements. The specific meanings of d0, d1, ..., d16 can be found in Example 5 and will not be repeated in this embodiment.

[0388] nd is the refractive index of each optical element when d-ray is irradiated. The specific meanings of nd1, nd2, ..., ndg can be found in Example 5 and will not be repeated in the embodiments of this application.

[0389] vd is the Abbe number of the optical element. The specific meanings of vd1, vd2, ..., and vdg can be found in Example 5 and will not be repeated in this embodiment.

[0390] Table 20 below shows the aspheric coefficients of each lens in a lens assembly provided in Example 7 of the present application.

[0391] As shown in Table 20, all lenses in the lens assembly 11 are aspherical lenses, that is, the lens assembly 11 includes 14 aspherical surfaces. The aspherical surface shape z of each lens in the lens assembly 11 can be calculated using the following aspherical surface formula:

[0392] Among them, z is the vector height of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex sphere curvature of the aspheric surface, k is the quadratic surface constant, A4, A6, A8, ... A30 are aspheric coefficients. According to the obtained aspheric surface shape, each lens can be simulated to finally obtain the camera module 10 shown in Figure 27.

[0393] The optical parameters of the lens assembly 11 composed of the above-mentioned lenses can be seen in Table 21 below.

[0394] Table 21 shows the optical parameters of a lens assembly provided in Example 7 of the present application.

[0395] It can be seen from Table 21 that the lens assembly 11 provided in Example 6 of the present application has the characteristics of large aperture and large target surface, and has a relatively small total length.

[0396] FIG28 is a graph showing axial chromatic aberration of a lens assembly provided in Example 7 of the present application. The axial chromatic aberration illustrated in FIG28 is the axial chromatic aberration of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through lens assembly 11. FIG28 shows that the axial chromatic aberration is relatively small after light passes through lens assembly 11.

[0397] Figure 29 is a graph of astigmatism field curvature for a lens assembly provided in Example 7 of the present application. Figure 29 shows the astigmatism field curvature graph for light with a wavelength of 555 nm after passing through lens assembly 11. As can be seen from Figure 29, lens assembly 11 exhibits low field curvature in both the sagittal and tangential directions, demonstrating high imaging quality.

[0398] Figure 30 is a distortion curve diagram of a lens assembly provided in Example 7 of the present application. Figure 30 shows the distortion curve for light with a wavelength of 555 nm after passing through lens assembly 11. As can be seen from Figure 30, the amount of distortion in the image formed by lens assembly 11 is minimal, and the image shape differs little from the ideal shape, meeting the distortion difference requirement and achieving high image quality.

[0399] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lens assembly, characterized in that: The lens comprises a plurality of lenses, wherein the plurality of lenses at least comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the direction of the optical axis; The lens assembly satisfies the conditional formula: 0.85≤2×IMH / (TTL×F#)≤1.5, wherein IMH is the half-image height of the lens assembly, F# is the aperture number of the lens assembly, and TTL is the total length of the lens assembly; The refractive index nd1 of the first lens and the refractive index nd2 of the second lens satisfy the conditional formula: 0.1<nd2-nd1<0.15, and the Abbe number vd1 of the first lens and the Abbe number vd2 of the second lens satisfy the conditional formula: 0 <vd1-vd2<40; The focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy the condition: |f3 / f4|>2.

5.

2. The lens assembly according to claim 1, wherein: The distance d45 from the image side surface of the fourth lens to the object side surface of the fifth lens in the optical axis direction satisfies the conditional formula: 0.03 <d45 / TTL<0.25。 3. The lens assembly according to claim 1 or 2, characterized in that: The Abbe number vd3 of the third lens and the Abbe number vd5 of the fifth lens satisfy the condition: vd3 / vd5<1.

4. The lens assembly according to any one of claims 1 to 3, characterized in that: The Abbe number vd2 of the second lens, the Abbe number vd3 of the third lens, and the Abbe number vd4 of the fourth lens satisfy the condition: vd2+vd3+vd4>92.

5. The lens assembly according to any one of claims 1 to 4, characterized in that: The refractive index of the fourth lens nd4 is less than 1.

69.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: At least the first lens, the second lens, the third lens, the fourth lens and the fifth lens are plastic lenses.

7. The lens assembly according to any one of claims 1 to 6, characterized in that: The first lens has positive optical power, and the second lens has negative optical power.

8. The lens assembly according to claim 7, wherein: At least a portion of the image-side surface of the first lens corresponding to the optical axis is a concave surface.

9. The lens assembly according to claim 7 or 8, characterized in that: The third lens has negative power, and the fourth lens has positive power.

10. The lens assembly according to claim 9, wherein: At least a portion of the object side surface of the third lens corresponding to the optical axis is a concave surface, and at least a portion of the image side surface of the third lens corresponding to the optical axis is a convex surface.

11. The lens assembly according to claim 9 or 10, characterized in that: At least a portion of the image-side surface of the fourth lens corresponding to the optical axis is a convex surface.

12. The lens assembly according to any one of claims 1 to 11, wherein: The curvature radius R2 of the image side surface of the first lens and the curvature radius R3 of the object side surface of the second lens satisfy the condition: R2 / R3>1.

4.

13. The lens assembly according to any one of claims 1 to 12, wherein: The focal length f4 of the fourth lens element and the total focal length f of the lens assembly satisfy the condition: 0≤f4 / f≤10.

14. The lens assembly according to any one of claims 1 to 13, wherein: The number N of the lenses satisfies the condition: 6≤N≤10.

15. The lens assembly according to claim 14, wherein: The focal length fi of each lens and the total focal length f of the lens assembly satisfy the conditional formula: ∑ i＝1…N |f / fi|>3, where fi is the focal length of the i-th lens, i=1…N.

16. The lens assembly according to any one of claims 1 to 15, characterized in that: The plurality of lenses further includes a seventh lens located on a side of the sixth lens facing the image side, and the seventh lens has negative optical power.

17. The lens assembly according to claim 16, wherein: At least a portion of the object-side surface of the seventh lens corresponding to the optical axis is a concave surface, and at least a portion of the image-side surface of the seventh lens corresponding to the optical axis is a concave surface.

18. The lens assembly according to claim 16 or 17, wherein: The object side curvature radius R13 of the seventh lens element and the total focal length f of the lens assembly satisfy the condition: 0≤|R13 / f|≤1.

8.

19. The lens assembly according to any one of claims 16 to 18, wherein: The focal length f1 of the first lens, the focal length f6 of the sixth lens, and the focal length f7 of the seventh lens satisfy the condition: f1 / (f6+f7)>1.

4.

20. A camera module, characterized in that: The lens assembly at least comprises an image sensor and any one of claims 1 to 19, wherein the image sensor is located on a side of the lens assembly facing the image side.

21. An electronic device, characterized in that: The invention comprises at least a shell and the camera module according to claim 20, wherein the camera module is arranged on the shell.

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