An imaging lens, a camera module, and an electronic device.

Abstract

This application provides an imaging lens, a camera module, and an electronic device. The imaging lens includes a first lens group, a second lens group, and a third lens group sequentially along the optical axis from the object side to the image side. The first lens group includes a first lens with positive refractive power, a second lens with negative refractive power, and a third lens with negative refractive power. The second lens group includes a fourth lens with positive refractive power, a fifth lens with negative refractive power, and a sixth lens with positive refractive power. The third lens group includes a seventh lens with negative refractive power. The positions of the first and third lens groups are fixed relative to the imaging plane of the camera module. The second lens group can move along the optical axis between the first and third lens groups, and the imaging lens satisfies 0.2 < |(FG1-FG2) / FG3| < 2. The imaging lens, camera module, and electronic device provided by this application can achieve the characteristics of long focal length, large aperture, and large target surface, and improve the shooting quality of the imaging lens under different environments and conditions.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to an imaging lens, a camera module, and an electronic device. Background Technology

[0002] With the development of camera equipment technology, more and more mobile terminal devices are equipped with camera functions. Users' requirements for the camera functions of mobile terminals are also becoming more diversified, expecting mobile terminals to achieve good shooting results in distant scenes, macro scenes, and low-light scenes.

[0003] For mobile devices, such as smartphones, to make them easier for users to carry and use, and to improve their aesthetics, the thickness of these devices is gradually being reduced, resulting in increasingly limited internal space in the thickness direction. Typically, camera modules are placed in the thickness direction of the device, and this limited internal space severely restricts the overall size of the camera module.

[0004] To achieve good photographic results in distant scenes, macro photography, and low-light conditions, a camera module with a telephoto lens is required for imaging. Traditional telephoto lenses use a motor to move the entire lens for focusing, which is not conducive to the miniaturization of the camera module. Furthermore, focusing via a motor results in poor image quality for telephoto lenses in macro photography, leading to subpar macro shooting performance. Additionally, due to the size constraints of mobile devices, telephoto lenses have large apertures and small focal lengths, resulting in poor low-light shooting performance. Summary of the Invention

[0005] This application provides an imaging lens, a camera module, and an electronic device to solve the problem of poor macro and low-light shooting effects of telephoto lenses configured in mobile terminals.

[0006] In a first aspect, embodiments of this application provide an imaging lens, which includes a first lens group, a second lens group, and a third lens group sequentially along the optical axis from the object side to the image side; the first lens group includes a first lens with positive refractive power, a second lens with negative refractive power, and a third lens with negative refractive power sequentially along the optical axis from the object side to the image side; the second lens group includes a fourth lens with positive refractive power, a fifth lens with negative refractive power, and a sixth lens with positive refractive power sequentially along the optical axis from the object side to the image side; and the third lens group includes a seventh lens with negative refractive power.

[0007] Among them, the positions of the first lens group and the third lens group are fixed relative to the imaging surface of the imaging module. The second lens group is disposed between the first lens group and the third lens group, and the second lens group is configured to be movable along the optical axis between the first lens group and the third lens group. The effective focal length FG1 of the first lens group, the effective focal length FG2 of the second lens group, and the effective focal length FG3 of the third lens group satisfy: 0.2 < |(FG1 - FG2) / FG3| < 2.

[0008] According to the above imaging lens, by setting the first lens group, the second lens group, and the third lens group, and limiting the refractive power of the lenses in the three lens groups, the imaging lens can receive incident light at a larger angle, converge the aberration and chromatic aberration of the imaging lens, realize the characteristics of a long focal length, large aperture, and large target surface, and improve the imaging performance of the imaging lens. At the same time, by designing the effective focal lengths of the first lens group, the second lens group, and the third lens group, the aberration of the imaging lens in different object distance states can be better balanced, and the imaging quality of the imaging lens from an infinite object distance to a near-focus object distance can be improved.

[0009] In one implementation, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is convex near the optical axis; the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; the object side surface of the third lens is convex near the optical axis, and the image side surface of the third lens is concave near the optical axis; the object side surface of the fourth lens is convex near the optical axis; the object side surface of the seventh lens is concave near the optical axis, and the image side surface of the seventh lens is concave near the optical axis. In this way, by reasonably designing the surface types of the lenses in the first lens group, the second lens group, and the third lens group, the imaging lens can receive incident light at a larger angle, and make the light entering the imaging lens transition smoothly, making the trend of the light more smooth, so as to realize the characteristics of a large aperture and a large target surface, and improve the imaging quality of the imaging lens.

[0010] In one implementation, the effective focal length f1 of the first lens and the effective focal length Finf of the imaging lens when focusing at infinity satisfy: 0.3 < f1 / Finf < 1.5. In this way, by constraining the effective focal length of the first lens, the spherical aberration of the imaging lens can be balanced, the imaging quality of the imaging lens can be improved, and the first lens has good assembly processability. At the same time, the first lens can also make the imaging lens receive incident light at a larger angle, expand the field angle range of the imaging lens, and further realize the characteristics of a long focal length, large aperture, and large target surface.

[0011] In one implementation, the effective focal length f2 of the second lens and the effective focal length FG1 of the first lens group satisfy: -4 < f2 / FG1 < -1. By constraining the effective focal length of the first lens group and the effective focal length of the second lens, the second lens can better transition the light incident through the first lens, reduce the bending angle of the large-angle incident light, which is beneficial to balancing the axial chromatic aberration of the imaging lens, improving the imaging performance of the entire system, and avoiding the purple fringing phenomenon during imaging.

[0012] In one implementation, the central thickness CT3 of the third lens on the optical axis, the curvature radius R31 of the object side surface of the third lens, and the curvature radius R32 of the image side surface of the third lens satisfy: 0.3 < CT3*(R32 / R31) < 1.5. In this way, by controlling the curvature radius of the object side surface, the curvature radius of the image side surface, and the central thickness of the third lens, the shape of the third lens can be constrained, enabling the light to smoothly enter the second lens group from the first lens group, and improving the imaging quality of the imaging lens.

[0013] In one implementation, the effective focal length f5 of the fifth lens and the effective focal length FG2 of the second lens group satisfy: -10 < f5 / FG2 < -1. In this way, by constraining the effective focal length of the fifth lens and the effective focal length of the second lens group within a reasonable range, it is beneficial to adjust the second lens group and make it have an appropriate positive optical power, shorten the focusing stroke, and achieve miniaturization of the module size.

[0014] In one implementation, the effective focal length f4 of the fourth lens, the effective focal length f6 of the sixth lens, and the effective focal length FG2 of the second lens group satisfy: 0 < (f6 - f4) / FG2 < 1. In this way, by constraining the effective focal lengths of the fourth lens and the sixth lens and the effective focal length of the second lens group, the refractive powers of the fourth lens and the sixth lens can be distributed, balancing the aberration of the imaging lens and improving the imaging performance of the imaging lens at different object distances.

[0015] In one implementation, the effective focal length FG3 of the third lens group and the curvature radius R72 of the image side surface of the seventh lens satisfy: -2 < FG3 / R72 < -0.2. In this way, by restricting the ratio of the effective focal length of the third lens group and the curvature radius of the image side surface of the seventh lens, the shape of the seventh lens can be constrained, and the astigmatism and field curvature of the imaging lens can be balanced, achieving the design of a large target surface.

[0016] In one implementation, the effective focal length Finf of the imaging lens when focusing at infinity and the effective focal length Fmac of the imaging lens when focusing at macro satisfy: 0 < Finf / Fmac < 1.5. In this way, by constraining the ratio of the effective focal lengths in the far-focus state and the near-focus state, the moving distance of the second lens group on the optical axis can be restricted, shortening the focusing stroke, and achieving miniaturization of the module size.

[0017] Secondly, embodiments of this application provide a camera module, which, from the object side to the image side, sequentially includes: an aperture stop, an imaging lens as described above, and an imaging surface. According to the above-described camera module, the camera module with the imaging lens, while featuring a miniaturized structure, also possesses the characteristics of a long focal length, large aperture, and large image surface, thereby improving the imaging performance of the camera module.

[0018] Thirdly, embodiments of this application provide an electronic device, including a front panel, a mid-frame, a rear cover, and a camera module as described above, wherein: a display screen is provided on the front panel, the mid-frame is disposed between the front panel and the rear cover, and a camera hole is provided on the rear cover; the camera module is disposed in the electronic device through the camera hole, and the optical axis of the imaging lens in the camera module is parallel to the thickness direction of the electronic device. Therefore, the camera module can be incorporated into the electronic device, thereby achieving miniaturization. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the thickness direction of an electronic device with electronic camera function;

[0021] Figure 2 This is a schematic diagram of the internal structure of camera module 150;

[0022] Figure 3 This is a schematic diagram of the structure of a camera module 200 provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of another camera module 200 provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing at infinity.

[0025] Figure 6 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro.

[0026] Figure 7 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focusing at infinity;

[0027] Figure 8The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro.

[0028] Figure 9 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing at infinity.

[0029] Figure 10 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro.

[0030] Figure 11 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focusing at infinity;

[0031] Figure 12 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro;

[0032] Figure 13 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing at infinity.

[0033] Figure 14 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro.

[0034] Figure 15 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focusing at infinity;

[0035] Figure 16 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro.

[0036] Figure 17 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing at infinity.

[0037] Figure 18 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro.

[0038] Figure 19 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focused at infinity;

[0039] Figure 20 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro.

[0040] Figure 21 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing at infinity.

[0041] Figure 22 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro.

[0042] Figure 23 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focused at infinity;

[0043] Figure 24 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro.

[0044] Figure 25 This is a schematic diagram of the structure of an electronic device in the thickness direction according to an embodiment of this application;

[0045] Figure 26 This is a schematic diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the protection scope of this application.

[0047] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0048] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0049] In the accompanying drawings, parameters such as the thickness, size, and proportion of the lenses have been exaggerated for ease of illustration. Therefore, the thickness, size, shape, and other parameters of the spherical or aspherical surfaces shown in the drawings are for illustrative purposes only and do not represent the actual shape of the aspherical or aspherical surfaces. In other words, the shape of the spherical or aspherical surfaces is not limited to the shapes shown in the accompanying drawings.

[0050] In this embodiment, the central region of the lens is the paraxial region, i.e., the region near the optical axis. The edge region of the lens is the faraxial region, i.e., the region of the lens far from the optical axis. If the surface of the lens is convex and the location of the convexity is not defined, it means that the surface of the lens is convex at least in the central region. If the surface of the lens is concave and the location of the concaveness is not defined, it means that the surface of the lens is concave at least in the central region.

[0051] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0052] With the development of camera equipment technology, more and more mobile terminal devices have camera functions, such as smartphones, tablets, camcorders, and digital cameras, all of which are equipped with photography modules to realize photography functions. This application uses a smartphone as an example for illustration.

[0053] Figure 1 This is a schematic diagram of the thickness of an electronic device with electronic camera functionality. Figure 1 As shown, the electronic device 100 includes a front panel 110, a middle frame 120, a rear cover 130, electronic components 140, and a camera module 150, wherein the front panel 110, the middle frame 120, and the rear cover 130 enclose a cavity, and the electronic components 140 and the camera module 150 are disposed in the cavity.

[0054] In this embodiment, the camera module 150 may be a front-facing camera and / or a rear-facing camera of the electronic device 100. The specific location of the camera module 150 is not limited in this application.

[0055] Figure 2 This is a schematic diagram of the internal structure of the camera module 150, as shown below. Figure 2 As shown, the camera module 150 includes an aperture 151, an imaging lens 152, and an image sensor 153. The camera module 150 may also include other imaging-related components, such as a protective film, a voice coil motor (VCM), a filter, a base, conductive cloth, a rigid-flex board, connectors, etc., which are not listed here.

[0056] To meet the user's requirements for the camera function of electronic device 100, the imaging lens 152 needs to have good image quality under long-distance, macro, and low-light conditions. For example, the imaging lens 152 can be constructed and imaged by combining multiple lenses. Figure 2As shown, the imaging lens 152 includes n lenses 1521 arranged sequentially along the optical axis of the imaging lens 152, where n is a positive integer greater than 1, and the optical axis of the imaging lens 152 is the same as the thickness direction of the electronic device 100.

[0057] Image sensor 153 includes photosensitive elements, such as charge-coupled devices (CCDs) and complementary metal-oxide-semiconductor (CMOS). Image sensor 153 is used to sense the light focused by imaging lens 152 and form an electronic image corresponding to the scene on the imaging surface, wherein the imaging surface is the side of image sensor 153 facing lens 1521.

[0058] As the number of lenses 1521 in the imaging lens 152 increases, the imaging lens 152's ability to converge light becomes higher, effectively improving the resolution and contrast of the imaging lens 152, as well as its anti-glare effect and image quality. However, correspondingly, the thickness of the imaging lens 152 also increases.

[0059] To facilitate user handling and improve the aesthetics of the electronic device 100, the dimensions of the electronic device 100 in the thickness direction will be gradually reduced. To accommodate the reduced dimensions of the electronic device 100 in the thickness direction, the dimensions of the camera module 150 in the thickness direction of the electronic device 100 also need to be reduced, and correspondingly, the dimensions of the imaging lens 152 in the thickness direction of the electronic device 100 also need to be reduced.

[0060] Building upon this, as users' demands for photographic quality increase, a camera module 150 employing a telephoto lens is needed to achieve good photographic results in distant scenes, macro photography, and low-light conditions. However, traditional telephoto lenses achieve focusing by moving the entire lens with a motor, which is not conducive to the miniaturization of the camera module 150. Furthermore, focusing via a motor-driven lens results in poor image quality for macro photography, leading to subpar macro shooting performance. Additionally, due to the size constraints of modules in mobile devices, the miniaturized telephoto lens has a smaller aperture and smaller sensor area, resulting in poor low-light shooting performance.

[0061] To solve the above problems, it is necessary to ensure that the imaging lens 152 includes a sufficient number of lenses 1521 and to effectively control the size of the imaging lens 152 in the thickness direction of the electronic device 100. In addition, it is also necessary to make reasonable designs for the lenses 1521 in the imaging lens 152 to improve its imaging quality in macro or low-light environments.

[0062] Figure 3This is a schematic diagram of the structure of a camera module 200 provided in an embodiment of this application. Figure 4 This is a schematic diagram of another camera module 200 provided in an embodiment of this application.

[0063] In the embodiments of this application, such as Figure 3 As shown, the camera module 200 includes an aperture stop ST0, an imaging lens 210, and an imaging surface L9 sequentially from the object side to the image side along the optical axis 201. In some embodiments, such as Figure 4 As shown, the camera module 200 may also include a filter L8, which is disposed between the imaging lens 210 and the imaging surface L9.

[0064] like Figure 3 and Figure 4 As shown, the imaging lens 210 includes a first lens group 211, a second lens group 212, and a third lens group 213 along the optical axis 201 from the object side to the image side. The first lens group 211 includes a first lens L1, a second lens L2, and a third lens L3 along the optical axis 201 from the object side to the image side. The second lens group 212 includes a fourth lens L4, a fifth lens L5, and a sixth lens L6 along the optical axis 201 from the object side to the image side. The third lens group 213 includes a seventh lens L7.

[0065] The positions of the first lens group 211 and the third lens group 213 are fixed relative to the imaging surface L9 of the camera module 200; the second lens group 212 is located between the first lens group 211 and the third lens group 213, and the second lens group 212 is configured to be movable along the optical axis 201 between the first lens group 211 and the third lens group 213.

[0066] It should be understood that, in the embodiments of this application, the object side refers to the side closer to the scene being photographed, and the image side refers to the side closer to the image sensor. Therefore, each lens in the imaging lens 210 has an object-side side and an image-side side, wherein the object-side side refers to the mirror surface of the lens facing the object side, and the image-side side refers to the mirror surface of the lens facing the image side. Figure 3 and Figure 4 As shown, the first lens L1 includes an object-side surface E11 and an image-side surface E12; the second lens L2 includes an object-side surface E21 and an image-side surface E22; the third lens L3 includes an object-side surface E31 and an image-side surface E32; the fourth lens L4 includes an object-side surface E41 and an image-side surface E42; the fifth lens L5 includes an object-side surface E51 and an image-side surface E52; the sixth lens L6 includes an object-side surface E61 and an image-side surface E62; and the seventh lens L7 includes an object-side surface E71 and an image-side surface E72.

[0067] like Figure 3 and Figure 4As shown, the aperture ST0 is disposed between the object side and the imaging lens 210, and in some embodiments, the aperture ST0 is an annular plate structure that can block light rays incident from the edge of the imaging lens 210. It should be understood that the larger the aperture ST0 is, the higher the light transmission, and the smaller the aperture ST0 is, the lower the light transmission.

[0068] In some embodiments, the filter L8 also has an object-side surface IR1 and an image-side surface IR2. The filter L8 is used to correct color deviation and / or protect the photosensitive element located on the imaging surface L9. The filter L8 may include blue glass and / or an IR-CUT dual filter, etc. The specific type of filter L8 is not limited in the embodiments of this application.

[0069] In practical applications, some edge rays of the incident light are intercepted by the aperture stop ST0 before entering the imaging lens 210, preventing them from entering the lens. The incident light that is not intercepted by the aperture stop ST0 enters from the object side E11 of the first lens L1, and then passes through each subsequent lens in sequence, exiting from the image side E72 of the seventh lens L7. The outgoing light enters from the object side IR1 of the filter L8 and exits through the image side IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, where it senses the light and generates a corresponding electronic image.

[0070] In this embodiment of the application, in order to improve the imaging quality of the camera module 200, such as Figure 3 As shown, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has negative refractive power.

[0071] Furthermore, the object-side surface E11 of the first lens L1 is convex near the optical axis 201, and the image-side surface E12 of the first lens L1 is convex near the optical axis 201; the object-side surface E21 of the second lens L2 is convex near the optical axis 201, and the image-side surface E22 of the second lens L2 is concave near the optical axis 201; the object-side surface E31 of the third lens L3 is convex near the optical axis 201, and the image-side surface E32 of the third lens L3 is concave near the optical axis 201; the object-side surface E41 of the fourth lens L4 is convex near the optical axis 201, and the image-side surface E42 of the fourth lens L4 is concave near the optical axis 201. The optical axis 201 can be either convex or concave; the object-side surface E51 of the fifth lens L5 near the optical axis 201 can be either convex or concave, and the image-side surface E52 of the fifth lens L5 near the optical axis 201 can be either concave or convex; the object-side surface E61 of the sixth lens L6 near the optical axis 201 can be either convex or concave, and the image-side surface E62 of the sixth lens L6 near the optical axis 201 can be either convex or concave; the object-side surface E71 of the seventh lens L7 near the optical axis 201 is concave, and the image-side surface E72 of the seventh lens L7 near the optical axis 201 is concave.

[0072] It should be noted that the concavity or convexity of the object side of a lens is referenced to the image side. A curved object side away from the image side is convex, and a curved object side towards the image side is concave. The concavity or convexity of the image side of a lens is referenced to the object side. A curved image side towards the object side is concave, and a curved image side away from the object side is convex.

[0073] Different lenses can have different optical properties depending on their surface design. Among them, the first lens L1, which has positive refractive power, can quickly converge incident light rays, reduce the light transmission aperture of the imaging lens 210, and at the same time receive incident light rays at a larger angle, thereby increasing the field of view of the image and achieving the characteristics of a long focal length, large aperture, and large target surface.

[0074] The second lens L2, which has negative refractive power, can make the transition of incident light at large angles smoother, reducing field curvature and spherical aberration.

[0075] The third lens L3, which has negative refractive power, can reduce the astigmatism of the imaging lens 210, allowing the incident light to smoothly transition into the second lens group 212.

[0076] The fourth lens L4, which has positive refractive power, can balance the field curvature and astigmatism produced by the imaging lens 210.

[0077] The fifth lens L5, which has negative refractive power, can reduce aberrations and chromatic aberrations generated by the imaging lens 210, and, in conjunction with other lenses in the second lens group 212, shorten the focusing distance.

[0078] The sixth lens L6, which has positive refractive power, can further converge the incident light rays and reduce the deviation of the incident and exit angles of the imaging lens 210 in different fields of view.

[0079] The seventh lens L7, which has negative refractive power, can balance aberrations and field curvature, improve the imaging quality of the imaging lens 210, and also smoothly transition the edge field rays to the imaging surface with a small deflection angle, thus realizing the large target surface feature of the imaging lens 210.

[0080] For example, the effective focal length FG1 of the first lens group 211, the effective focal length FG2 of the second lens group 212, and the effective focal length FG3 of the third lens group 213 satisfy the relationship (1):

[0081] 0.2 < |(FG1-FG2) / FG3| < 2 (1)

[0082] By setting up a first lens group 211, a second lens group 212, and a third lens group 213, and limiting the refractive power of the lenses in the three lens groups, the imaging lens 210 can receive incident light at a wider angle, and the aberrations and chromatic aberrations of the imaging lens 210 are reduced, achieving the characteristics of a long focal length, large aperture, and large target surface, and improving the imaging performance of the imaging lens 210. Simultaneously, by designing the effective focal lengths of the first lens group 211, the second lens group 212, and the third lens group 213, the aberrations of the imaging lens 210 at different object distances can be better balanced, improving the imaging quality of the imaging lens 210 from infinity object distance to near-focal distance.

[0083] In some embodiments, the effective focal length f1 of the first lens L1 and the effective focal length Finf of the imaging lens 210 when focusing at infinity satisfy the relationship (2):

[0084] 0.3 <f1 / Finf<1.5 (2)

[0085] In this embodiment, by constraining the effective focal length f1 of the first lens L1, the spherical aberration of the imaging lens 210 can be balanced, thereby improving the imaging quality of the imaging lens 210. Simultaneously, combined with the surface design of the first lens L1, the first lens L1 also enables the imaging lens 210 to receive incident light at a wider angle, expanding the field of view of the imaging lens 210, thus achieving the characteristics of a long focal length, large aperture, and large target surface.

[0086] In some embodiments, the effective focal length f2 of the second lens L2 and the effective focal length FG1 of the first lens group 211 satisfy the relationship (3):

[0087] -4 <f2 / FG1<-1 (3)

[0088] By constraining the effective focal length of the first lens group 211 and the effective focal length of the second lens L2, the second lens L2 can better transition the light rays incident through the first lens L1, reduce the bending angle of large-angle incident light rays, which is beneficial to balancing the axial chromatic aberration of the imaging lens 210, reducing the influence of edge light rays on imaging, improving the imaging performance of the entire system, and avoiding purple fringing during imaging.

[0089] In some embodiments, the central thickness CT3 of the third lens L3 on the optical axis 201, the radius of curvature R31 of the object side surface E31 of the third lens L3, and the radius of curvature R32 of the image side surface E32 of the third lens L3 satisfy the relationship (4):

[0090] 0.3 <CT3*(R32 / R31)<1.5 (4)

[0091] In this way, the shape of the third lens L3 can be constrained by controlling the numerical relationship between CT3, R31 and R32, so that light can smoothly enter the second lens group 212 from the first lens group 211, thereby improving the imaging quality of the imaging lens 210.

[0092] In some embodiments, the effective focal length f5 of the fifth lens L5 and the effective focal length FG2 of the second lens group 212 satisfy the relationship (5):

[0093] -10 <f5 / FG2<-1 (5)

[0094] In this way, by constraining the effective focal length f5 of the fifth lens L5 and the effective focal length FG2 of the second lens group 212 within a reasonable range, the second lens group 212 is adjusted to have a suitable positive optical power, shortening the focusing stroke and realizing the miniaturization of the camera module 200.

[0095] In some embodiments, the effective focal length f4 of the fourth lens L4, the effective focal length f6 of the sixth lens L6, and the effective focal length FG2 of the second lens group 212 satisfy the relationship (6):

[0096] 0<(f6-f4) / FG2<1 (6)

[0097] In this way, by constraining the effective focal lengths of the fourth lens L4 and the sixth lens L6 with the effective focal length of the second lens group 212, the refractive power of the fourth lens L4 and the sixth lens L6 can be distributed, the aberrations of the imaging lens 210 can be balanced, and the imaging performance of the imaging lens 210 at different object distances can be improved.

[0098] In some embodiments, the effective focal length FG3 of the third lens group 213 and the radius of curvature R72 of the image side surface E72 of the seventh lens L7 satisfy the relationship (7):

[0099] -2 <FG3 / R72<-0.2 (7)

[0100] In this way, by limiting the ratio of the effective focal length FG3 of the third lens group 213 to the radius of curvature R72 of the image plane side E72 of the seventh lens L7, the shape of the seventh lens L7 can be constrained, and the astigmatism and field curvature of the imaging lens 210 can be balanced, thus achieving the design of a large target surface.

[0101] In some embodiments, the effective focal length Finf of the imaging lens 210 when focusing at infinity and the effective focal length Fmac of the imaging lens 210 when focusing at macro satisfy the relationship (8):

[0102] 0 <Finf / Fmac<1.5 (8)

[0103] In this way, by constraining the effective focal length ratio between the telephoto and near-focus states, the movement distance of the second lens group 212 on the optical axis 201 can be limited, the focusing stroke can be shortened, and the overall size of the camera module 200 can be miniaturized.

[0104] In some embodiments, each lens includes at least one aspherical lens, meaning that at least one of the object-side surface E11 of the first lens L1 to the image-side surface E72 of the seventh lens L7 is an aspherical mirror. Aspherical lenses have the characteristic that their curvature changes continuously from the lens center to the lens edge. Unlike spherical lenses, which have a constant curvature from the lens center to the lens edge, aspherical lenses have better radius of curvature characteristics, which has the advantage of improving aberrations. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0105] In some embodiments, at least one of the object-side surface and the image-side surface of each of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 is an aspherical mirror surface.

[0106] In some embodiments, the object-side surface and image-side surface of each of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are aspherical mirror surfaces.

[0107] In some embodiments, each lens may be a plastic lens to achieve a thin and light imaging lens 210 while making it easier to process the complex surface shapes of each lens. In other embodiments, each lens may be a glass lens, thereby enabling the imaging lens 210 to have good optical performance while reducing the temperature sensitivity of the imaging lens 210.

[0108] In some embodiments, each lens includes at least one glass lens. For example, the first lens L1 in the imaging lens 210 may be a glass lens, while the others may be plastic lenses. Compared to plastic lenses, glass lenses have a higher refractive index and a lower dispersion coefficient, allowing the first lens L1 to maintain good optical performance while also reducing its temperature sensitivity, thus enabling the imaging lens 210 to be used in more environments. The aforementioned lens materials are merely illustrative examples in this application, and no specific material composition is limited in this application.

[0109] Therefore, the imaging lens 210 provided in this application embodiment can both increase the amount of light entering the lens and enhance image quality in dark environments, and avoid adverse effects such as overexposure in bright environments. By reasonably allocating the refractive power, surface shape, material, and size of each lens in the imaging lens, incident light can be effectively converged, aberrations and astigmatism can be reduced, so that the imaging lens 210 can adapt to the dimensions of the terminal device in the thickness direction, effectively improving the imaging quality of the imaging lens 210 in complex lighting environments, and effectively improving the convenience of processing and assembling each lens. Correspondingly, the camera module 200 provided in this application embodiment can also have characteristics such as long focal length, large aperture, large target surface, and high imaging quality while adapting to the dimensions of the terminal device in the thickness direction.

[0110] The following will describe in detail some of the optional embodiments of the imaging lens 210 with reference to specific parameters.

[0111] Example 1

[0112] Figure 5 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing at infinity. Figure 6 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro. Figure 5 and Figure 6 As shown, the camera module 200, along the optical axis 201 from the object side to the image side, includes, in sequence: an aperture stop ST0, a first lens group 211, a second lens group 212, a third lens group 213, a filter L8, and an imaging surface L9. The first lens group 211, along the optical axis 201 from the object side to the image side, includes a first lens L1, a second lens L2, and a third lens L3; the second lens group 212, along the optical axis 201 from the object side to the image side, includes a fourth lens L4, a fifth lens L5, and a sixth lens L6; and the third lens group 213 includes a seventh lens L7.

[0113] The first lens L1 has positive refractive power. Its object-side surface E11 is convex near the optical axis 201, and its image-side surface E12 is also convex near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is convex near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has negative refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is concave near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is convex near the optical axis 201, and its image-side surface E42 is concave near the optical axis 201. The fifth lens L5 has negative refractive power. The object-side surface E51 of the fifth lens L5 is convex near the optical axis 201, and the image-side surface E52 of the fifth lens L5 is concave near the optical axis 201. The sixth lens L6 has positive refractive power. The object-side surface E61 of the sixth lens L6 is convex near the optical axis 201, and the image-side surface E62 of the sixth lens L6 is convex near the optical axis 201. The seventh lens L7 has negative refractive power. The object-side surface E71 of the seventh lens L7 is concave near the optical axis 201, and the image-side surface E72 of the seventh lens L7 is concave near the optical axis 201.

[0114] Table 1 shows the basic parameters of the camera module 200 in Embodiment 1, where the units for radius of curvature, thickness, and focal length are all millimeters (mm).

[0115] Table 1

[0116]

[0117]

[0118] It should be noted that among the thickness values ​​listed in Table 1, the values ​​corresponding to the object side of the lens and filter are the center thickness of the lens or filter, that is, the thickness of the lens or filter on the optical axis 201; while the values ​​corresponding to the image side of the lens and filter are the spatial distance between the lens or filter and the object side of the rear component on the optical axis 201.

[0119] As shown in Table 1, when focusing at macro, the spatial distance between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is T34 = 0.98 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is T67 = 5.77 mm. When focusing at infinity, the spatial distance between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is T34 = 4.44 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is T67 = 2.31 mm.

[0120] In Embodiment 1, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.89 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.57 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.78, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.43. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.36°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 16.37°. The effective focal length FG1 of the first lens group 211 is 29.5 mm, the effective focal length FG2 of the second lens group 212 is 22 mm, and the effective focal length FG3 of the third lens group 213 is -16.35 mm.

[0121] It should be noted that in this embodiment, when the imaging lens 210 is focusing on macro, the distance between the lens and the object surface is less than or equal to 12cm.

[0122] In this embodiment, the object-side surface and image-side surface of any one of the lenses from the first lens L1 to the seventh lens L7 are aspherical, and the surface shape of each aspherical lens satisfies (but is not limited to) the following formula (9):

[0123]

[0124] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis 201, c is the paraxial curvature of the aspherical surface, c = 1 / R (paraxial curvature c is the reciprocal of the radius of curvature R in Table 1), k is the conic coefficient, and Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical mirrors in Example 1.

[0125] Table 2-1

[0126]

[0127]

[0128] Table 2-2

[0129] Face number A12 A14 A16 A18 A20 E11 1.29695E-08 -4.81463E-11 7.07588E-12 -6.10739E-14 1.23953E-15 E12 -1.13051E-07 2.69494E-09 -4.72691E-11 4.71630E-13 -2.30501E-15 E21 -7.58430E-08 5.56351E-10 1.25092E-14 4.13635E-14 -1.45231E-15 E22 -5.01919E-08 2.51177E-10 1.21640E-14 -1.76953E-13 3.04304E-15 E31 9.38705E-09 -5.65792E-10 1.70088E-13 2.89145E-13 -7.68950E-15 E32 5.35149E-10 -7.49765E-11 2.69423E-11 -2.13162E-13 -8.83644E-15 E41 8.24601E-08 -1.83904E-10 1.74563E-11 0.00000E+00 0.00000E+00 E42 6.29536E-07 -3.08878E-08 4.87327E-10 0.00000E+00 0.00000E+00 E51 7.48761E-07 -5.90129E-09 1.44279E-10 0.00000E+00 0.00000E+00 E52 1.00255E-08 -1.97623E-09 5.21913E-11 0.00000E+00 0.00000E+00 E61 -4.42193E-09 5.62520E-09 -1.18923E-10 7.78441E-14 7.63174E-14 E62 8.16220E-08 -2.24070E-09 2.49199E-10 -1.10349E-12 1.00739E-14 E71 -4.98647E-08 2.75517E-09 -1.83140E-10 4.31088E-12 -2.99687E-14 E72 1.80153E-08 -2.43939E-09 1.57328E-11 -5.75757E-13 5.21121E-15

[0130] Incident light passes through as Figure 5 and Figure 6 The aperture ST0 shown intercepts some light rays, allowing some light to enter from the object-side surface E11 of the first lens L1. The incident light rays pass through each lens in sequence and exit from the image-side surface E72 of the seventh lens L7. The outgoing light rays enter from the object-side surface IR1 of the filter L8 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L8, are incident on the imaging surface L9, which senses the incident light rays and generates a corresponding electronic image.

[0131] Figure 7 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focused at infinity. Figure 8 The image astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro.

[0132] Among them, the astigmatism curve is used to represent the meridional image plane curvature and the sagittal image plane curvature, and the distortion curve is used to represent the distortion magnitude corresponding to different image heights. In Example 1, the wavelength of the reference light used for testing is 555nm. According to Figure 7 and Figure 8 It can be seen that, at this reference wavelength, the imaging lens 210 given in Example 1 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0133] Example 2

[0134] Figure 9 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing at infinity. Figure 10 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro. Figure 9 and Figure 10 As shown, the camera module 200, along the optical axis 201 from the object side to the image side, includes, in sequence: an aperture stop ST0, a first lens group 211, a second lens group 212, a third lens group 213, a filter L8, and an imaging surface L9. The first lens group 211, along the optical axis 201 from the object side to the image side, includes a first lens L1, a second lens L2, and a third lens L3; the second lens group 212, along the optical axis 201 from the object side to the image side, includes a fourth lens L4, a fifth lens L5, and a sixth lens L6; and the third lens group 213 includes a seventh lens L7.

[0135] The first lens L1 has positive refractive power. Its object-side surface E11 is convex near the optical axis 201, and its image-side surface E12 is also convex near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is convex near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has negative refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is concave near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is convex near the optical axis 201, and its image-side surface E42 is concave near the optical axis 201. The fifth lens L5 has negative refractive power. The object-side surface E51 of the fifth lens L5 is convex near the optical axis 201, and the image-side surface E52 of the fifth lens L5 is concave near the optical axis 201. The sixth lens L6 has positive refractive power. The object-side surface E61 of the sixth lens L6 is convex near the optical axis 201, and the image-side surface E62 of the sixth lens L6 is convex near the optical axis 201. The seventh lens L7 has negative refractive power. The object-side surface E71 of the seventh lens L7 is concave near the optical axis 201, and the image-side surface E72 of the seventh lens L7 is concave near the optical axis 201.

[0136] Table 3 shows the basic parameters of the camera module 200 in Embodiment 2, where the units for radius of curvature, thickness and focal length are millimeters (mm).

[0137] Table 3

[0138]

[0139] It should be noted that among the thickness values ​​listed in Table 3, the values ​​corresponding to the object side of the lens and filter are the center thickness of the lens or filter, that is, the thickness of the lens or filter on the optical axis 201; while the values ​​corresponding to the image side of the lens and filter are the spatial distance between the object side of the lens or filter and the object side of the rear component on the optical axis 201.

[0140] As shown in Table 3, when focusing on macro, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 1 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 5.79 mm. When focusing at infinity, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 4.56 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 2.23 mm.

[0141] In Embodiment 2, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 20mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.55mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.8, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.46. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.35°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 16.3°. The effective focal length FG1 of the first lens group 211 is 29.18mm, the effective focal length FG2 of the second lens group 212 is 22.77mm, and the effective focal length FG3 of the third lens group 213 is -16.32mm.

[0142] It should be noted that in this embodiment, when the imaging lens 210 is focusing on macro, the distance between the lens and the object surface is less than or equal to 12cm.

[0143] In Embodiment 2, the object side and image side of any one of the first lens L1 to the seventh lens L7 are aspherical, and the surface shape of each aspherical lens satisfies the formula (9) in Embodiment 1. Tables 4-1 and 4-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 2.

[0144] Table 4-1

[0145] Face number K A4 A6 A8 A10 E11 -3.71602E-02 1.04880E-04 -8.03411E-07 3.01177E-07 -2.09742E-07 E12 -5.50548E+01 -1.90297E-03 9.94011E-05 -1.43662E-05 3.90061E-07 E21 4.04033E+00 -4.67763E-04 7.62501E-04 -6.31921E-06 2.47489E-06 E22 -8.20920E+00 -1.67150E-03 7.02441E-04 -9.88793E-06 1.28216E-06 E31 6.04772E+00 1.58137E-04 1.03317E-04 -2.41366E-07 -6.23194E-07 E32 1.60865E+00 1.99483E-03 -2.13991E-04 1.99666E-07 -2.28805E-07 E41 -9.92220E-02 1.22813E-04 9.92378E-05 -1.93861E-05 2.41018E-06 E42 3.23014E+01 -2.58090E-03 1.74906E-03 -3.71582E-04 2.17547E-05 E51 0.00000E+00 -8.07475E-03 1.09571E-03 -2.91058E-04 3.83117E-05 E52 0.00000E+00 -2.17553E-03 6.08973E-04 -2.54275E-05 8.57382E-07 E61 2.78900E+00 -8.04307E-04 -3.39597E-05 1.98484E-06 -2.97928E-06 E62 5.17298E+01 7.94785E-05 -5.48069E-05 8.15416E-05 -1.25423E-05 E71 5.60204E-01 -1.05485E-03 -1.42700E-04 4.87355E-06 -2.49840E-06 E72 -1.25222E+01 -1.24011E-03 -5.38845E-05 6.00481E-05 -8.23989E-07

[0146] Table 4-2

[0147] Face number A12 A14 A16 A18 A20 E11 1.69167E-08 -4.25997E-10 5.60490E-12 -5.44157E-14 8.86706E-16 E12 -1.25858E-07 1.08370E-10 -5.81639E-11 3.40878E-13 -1.87112E-16 E21 -1.11907E-07 1.49725E-09 2.32073E-12 1.29354E-14 -3.90207E-15 E22 -3.19844E-08 9.80426E-11 1.22340E-15 -3.90076E-13 8.78421E-15 E31 1.28798E-08 -7.51957E-10 5.24358E-13 3.78906E-13 -1.43300E-14 E32 6.41068E-09 -1.67878E-10 6.53332E-12 -3.19142E-13 -8.11411E-15 E41 -4.57224E-08 5.26135E-09 -5.34749E-15 0.00000E+00 0.00000E+00 E42 -2.34122E-06 7.96563E-08 -1.83717E-12 0.00000E+00 0.00000E+00 E51 -6.33824E-07 6.44578E-08 -4.45620E-10 0.00000E+00 0.00000E+00 E52 -2.96247E-07 1.10398E-08 -8.64488E-11 0.00000E+00 0.00000E+00 E61 3.39207E-07 -1.11900E-07 3.27446E-09 -1.30429E-10 1.45911E-12 E62 1.25142E-06 -3.74966E-08 8.08729E-10 -2.02326E-12 9.99863E-14 E71 1.40353E-07 -1.63729E-08 7.75593E-10 -1.32950E-11 2.56226E-14 E72 5.61685E-07 -1.26868E-08 1.97452E-10 -2.40463E-12 5.91008E-15

[0148] Incident light passes through as Figure 9 and Figure 10 The aperture ST0 shown intercepts some light rays, allowing some light to enter from the object-side surface E11 of the first lens L1. The incident light rays pass through each lens in sequence and exit from the image-side surface E72 of the seventh lens L7. The outgoing light rays enter from the object-side surface IR1 of the filter L8 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L8, are incident on the imaging surface L9, which senses the incident light rays and generates a corresponding electronic image.

[0149] Figure 11 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focused at infinity. Figure 12 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro are shown.

[0150] Among them, the astigmatism curve is used to represent the meridional image plane curvature and the sagittal image plane curvature, and the distortion curve is used to represent the distortion magnitude corresponding to different image heights. In Example 2, the wavelength of the reference light used for testing is 555nm. According to Figure 11 and Figure 12 It can be seen that, at this reference wavelength, the imaging lens 210 given in Embodiment 2 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0151] Example 3

[0152] Figure 13 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing at infinity. Figure 14 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro. Figure 13 and Figure 14 As shown, the camera module 200, along the optical axis 201 from the object side to the image side, includes, in sequence: an aperture stop ST0, a first lens group 211, a second lens group 212, a third lens group 213, a filter L8, and an imaging surface L9. The first lens group 211, along the optical axis 201 from the object side to the image side, includes a first lens L1, a second lens L2, and a third lens L3; the second lens group 212, along the optical axis 201 from the object side to the image side, includes a fourth lens L4, a fifth lens L5, and a sixth lens L6; and the third lens group 213 includes a seventh lens L7.

[0153] The first lens L1 has positive refractive power. Its object-side surface E11 is convex near the optical axis 201, and its image-side surface E12 is also convex near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is convex near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has negative refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is concave near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is convex near the optical axis 201, and its image-side surface E42 is concave near the optical axis 201. The fifth lens L5 has negative refractive power. Its object-side surface E51 is convex near the optical axis 201, and its image-side surface E52 is concave near the optical axis 201. The sixth lens L6 has positive refractive power. Its object-side surface E61 is convex near the optical axis 201, and its image-side surface E62 is concave near the optical axis 201. The seventh lens L7 has negative refractive power. Its object-side surface E71 is concave near the optical axis 201, and its image-side surface E72 is concave near the optical axis 201.

[0154] Table 5 shows the basic parameters of the camera module 200 in Embodiment 3, where the units for radius of curvature, thickness, and focal length are all millimeters (mm).

[0155] Table 5

[0156]

[0157]

[0158] It should be noted that among the thickness values ​​listed in Table 5, the values ​​corresponding to the object side of the lens and filter are the center thickness of the lens or filter, that is, the thickness of the lens or filter on the optical axis 201; while the values ​​corresponding to the image side of the lens and filter are the spatial distance between the lens or filter and the object side of the rear component on the optical axis 201.

[0159] As shown in Table 5, when focusing at macro, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 1.06 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 5.7 mm. When focusing at infinity, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 4.48 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 2.28 mm.

[0160] In Embodiment 3, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.75 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.54 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.79, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.45. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.43°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 16.36°. The effective focal length FG1 of the first lens group 211 is 30.36 mm, the effective focal length FG2 of the second lens group 212 is 21.87 mm, and the effective focal length FG3 of the third lens group 213 is -16.17 mm.

[0161] It should be noted that in this embodiment, when the imaging lens 210 is focusing on macro, the distance between the lens and the object surface is less than or equal to 12cm.

[0162] In Embodiment 3, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical, and the surface shape of each aspherical lens satisfies the formula (9) in Embodiment 1. Tables 6-1 and 6-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 3.

[0163] Table 6-1

[0164] Face number K A4 A6 A8 A10 E11 -8.95407E-01 4.16309E-06 -1.37515E-05 7.94084E-07 -2.29225E-07 E12 3.73709E+01 -1.16537E-03 1.45906E-04 -5.31707E-05 2.65870E-06 E21 1.23992E+00 -1.12402E-03 5.39701E-04 -8.98056E-05 7.44415E-07 E22 -2.87442E+00 -2.54144E-03 2.23477E-04 -9.96161E-06 6.66062E-07 E31 4.70137E-01 4.84161E-04 3.11568E-05 -5.76587E-06 -2.57398E-07 E32 4.31906E-01 2.00781E-03 -8.60547E-05 1.12678E-05 -5.60978E-07 E41 -3.15078E-01 2.71372E-04 -7.27583E-05 3.25583E-06 -8.31333E-07 E42 5.39065E+01 -2.54022E-04 1.09293E-04 1.84798E-05 -4.75891E-06 E51 0.00000E+00 -4.97572E-03 1.87336E-04 6.51034E-06 -8.01558E-06 E52 0.00000E+00 -3.40532E-03 1.36509E-04 -4.06797E-06 -2.42412E-07 E61 1.73977E-01 -1.36586E-04 -7.16939E-05 9.08682E-07 -1.92218E-06 E62 5.40279E+01 -3.25524E-05 -7.58019E-05 2.49506E-06 -1.97023E-07 E71 -1.36754E+01 -3.94383E-03 6.37890E-05 2.26710E-07 -3.00663E-07 E72 -1.99098E+00 -2.33051E-03 2.89471E-05 -5.37838E-07 -7.54310E-08

[0165] Table 6-2

[0166]

[0167]

[0168] Incident light passes through as Figure 13 and Figure 14 The aperture ST0 shown intercepts some light rays, allowing some light to enter from the object-side surface E11 of the first lens L1. The incident light rays pass through each lens in sequence and exit from the image-side surface E72 of the seventh lens L7. The outgoing light rays enter from the object-side surface IR1 of the filter L8 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L8, are incident on the imaging surface L9, which senses the incident light rays and generates a corresponding electronic image.

[0169] Figure 15 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focused at infinity. Figure 16 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro are shown.

[0170] Among them, the astigmatism curve is used to represent the meridional image plane curvature and the sagittal image plane curvature, and the distortion curve is used to represent the distortion magnitude corresponding to different image heights. In Example 3, the wavelength of the reference light used for testing is 555nm. According to Figure 15 and Figure 16 It can be seen that, at this reference wavelength, the imaging lens 210 given in Embodiment 3 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0171] Example 4

[0172] Figure 17 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing at infinity. Figure 18 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro. Figure 17 and Figure 18As shown, the camera module 200, along the optical axis 201 from the object side to the image side, includes, in sequence: an aperture stop ST0, a first lens group 211, a second lens group 212, a third lens group 213, a filter L8, and an imaging surface L9. The first lens group 211, along the optical axis 201 from the object side to the image side, includes a first lens L1, a second lens L2, and a third lens L3; the second lens group 212, along the optical axis 201 from the object side to the image side, includes a fourth lens L4, a fifth lens L5, and a sixth lens L6; and the third lens group 213 includes a seventh lens L7.

[0173] The first lens L1 has positive refractive power. Its object-side surface E11 and image-side surface E12 are both convex near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 and image-side surface E22 are both concave near the optical axis 201. The third lens L3 has negative refractive power. Its object-side surface E31 and image-side surface E32 are both convex near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 and image-side surface E42 are both convex near the optical axis 201. The fifth lens L5 has negative refractive power. The object-side surface E51 of the fifth lens L5 is concave near the optical axis 201, and the image-side surface E52 of the fifth lens L5 is also concave near the optical axis 201. The sixth lens L6 has positive refractive power. The object-side surface E61 of the sixth lens L6 is concave near the optical axis 201, and the image-side surface E62 of the sixth lens L6 is convex near the optical axis 201. The seventh lens L7 has negative refractive power. The object-side surface E71 of the seventh lens L7 is concave near the optical axis 201, and the image-side surface E72 of the seventh lens L7 is also concave near the optical axis 201.

[0174] Table 7 shows the basic parameters of the camera module 200 in Embodiment 4, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0175] Table 7

[0176]

[0177] It should be noted that among the thickness values ​​listed in Table 7, the values ​​corresponding to the object side of the lens and filter are the center thickness of the lens or filter, that is, the thickness of the lens or filter on the optical axis 201; while the values ​​corresponding to the image side of the lens and filter are the spatial distance between the lens or filter and the object side of the rear component on the optical axis 201.

[0178] As shown in Table 7, when focusing on macro, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 1.72 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 4.47 mm. When focusing at infinity, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 4.07 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 2.12 mm.

[0179] In Embodiment 4, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.7 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.88 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.75, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.42. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.46°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 17.04°. The effective focal length FG1 of the first lens group 211 is 28.23 mm, the effective focal length FG2 of the second lens group 212 is 17.3 mm, and the effective focal length FG3 of the third lens group 213 is -12.71 mm.

[0180] It should be noted that in this embodiment, when the imaging lens 210 is focusing on macro, the distance between the lens and the object surface is less than or equal to 15cm.

[0181] In Embodiment 4, the object side and image side of any one of the first lens L1 to the seventh lens L7 are aspherical, and the surface shape of each aspherical lens satisfies the formula (9) in Embodiment 1. Tables 8-1 and 8-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 4.

[0182] Table 8-1

[0183]

[0184]

[0185] Table 8-2

[0186] Face number A12 A14 A16 A18 A20 E11 1.79098E-08 -9.16178E-10 4.56114E-11 -2.90515E-13 4.98891E-15 E12 -1.61189E-07 6.04320E-10 -2.50325E-11 1.31480E-12 -1.33738E-17 E21 -9.41259E-08 1.14289E-09 4.84776E-13 1.42304E-14 -1.60724E-15 E22 -2.22734E-08 1.18745E-14 -9.59746E-14 8.29701E-15 6.75378E-15 E31 5.07729E-08 -8.08296E-10 -4.52583E-13 9.50838E-15 -3.96729E-15 E32 1.65897E-08 -1.08753E-10 5.92515E-12 2.22191E-14 -7.09182E-15 E41 -5.36027E-07 1.50988E-08 -6.69321E-11 0.00000E+00 0.00000E+00 E42 -1.00248E-06 9.34967E-09 -4.14396E-10 0.00000E+00 0.00000E+00 E51 -2.23447E-07 3.09325E-08 -5.06602E-10 0.00000E+00 0.00000E+00 E52 -1.57450E-07 2.52452E-09 -7.79125E-12 0.00000E+00 0.00000E+00 E61 1.13472E-08 -3.31964E-09 5.92761E-12 0.00000E+00 0.00000E+00 E62 2.64611E-08 -8.53823E-10 2.05015E-11 0.00000E+00 0.00000E+00 E71 -3.84994E-09 2.13192E-11 -1.94180E-13 0.00000E+00 0.00000E+00 E72 -1.49340E-08 1.69893E-10 -3.64797E-14 0.00000E+00 0.00000E+00

[0187] Incident light passes through as Figure 17 and Figure 18The aperture ST0 shown intercepts some light rays, allowing some light to enter from the object-side surface E11 of the first lens L1. The incident light rays pass through each lens in sequence and exit from the image-side surface E72 of the seventh lens L7. The outgoing light rays enter from the object-side surface IR1 of the filter L8 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L8, are incident on the imaging surface L9, which senses the incident light rays and generates a corresponding electronic image.

[0188] Figure 19 The image astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focused at infinity. Figure 20 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro are shown.

[0189] Among them, the astigmatism curve is used to represent the meridional image plane curvature and the sagittal image plane curvature, and the distortion curve is used to represent the distortion magnitude corresponding to different image heights. In Example 4, the wavelength of the reference light used for testing is 555nm. According to Figure 19 and Figure 20 It can be seen that, at this reference wavelength, the imaging lens 210 given in Embodiment 4 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0190] Example 5

[0191] Figure 21 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing at infinity. Figure 22 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro. Figure 21 and Figure 22 As shown, the camera module 200, along the optical axis 201 from the object side to the image side, includes, in sequence: an aperture stop ST0, a first lens group 211, a second lens group 212, a third lens group 213, a filter L8, and an imaging surface L9. The first lens group 211, along the optical axis 201 from the object side to the image side, includes a first lens L1, a second lens L2, and a third lens L3; the second lens group 212, along the optical axis 201 from the object side to the image side, includes a fourth lens L4, a fifth lens L5, and a sixth lens L6; and the third lens group 213 includes a seventh lens L7.

[0192] The first lens L1 has positive refractive power. Its object-side surface E11 is convex near the optical axis 201, and its image-side surface E12 is also convex near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is convex near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has negative refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is concave near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is convex near the optical axis 201, and its image-side surface E42 is concave near the optical axis 201. The fifth lens L5 has negative refractive power. The object-side surface E51 of the fifth lens L5 is concave near the optical axis 201, and the image-side surface E52 of the fifth lens L5 is also concave near the optical axis 201. The sixth lens L6 has positive refractive power. The object-side surface E61 of the sixth lens L6 is concave near the optical axis 201, and the image-side surface E62 of the sixth lens L6 is convex near the optical axis 201. The seventh lens L7 has negative refractive power. The object-side surface E71 of the seventh lens L7 is concave near the optical axis 201, and the image-side surface E72 of the seventh lens L7 is also concave near the optical axis 201.

[0193] Table 9 shows the basic parameters of the camera module 200 in Embodiment 5, where the units for radius of curvature, thickness, and focal length are millimeters (mm).

[0194] Table 9

[0195]

[0196] It should be noted that among the thickness values ​​listed in Table 9, the values ​​corresponding to the object side of the lens and filter are the center thickness of the lens or filter, that is, the thickness of the lens or filter on the optical axis 201; while the values ​​corresponding to the image side of the lens and filter are the spatial distance between the object side of the lens or filter and the object side of the rear component on the optical axis 201.

[0197] As shown in Table 9, when focusing on macro, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 1.26 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 4.36 mm. When focusing at infinity, the spatial distance T34 between the image-side surface E32 of the third lens L3 and the object-side surface E41 of the fourth lens L4 is 4.16 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface E71 of the seventh lens L7 is 1.46 mm.

[0198] In Embodiment 5, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.77 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 14.67 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.8, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.38. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.43°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 17.05°. The effective focal length FG1 of the first lens group 211 is 27.19 mm, the effective focal length FG2 of the second lens group 212 is 15.5 mm, and the effective focal length FG3 of the third lens group 213 is -11.78 mm.

[0199] It should be noted that in this embodiment, when the imaging lens 210 is focusing on macro, the distance between the lens and the object surface is less than or equal to 11cm.

[0200] In Embodiment 5, the object side and image side of any one of the first lens L1 to the seventh lens L7 are aspherical, and the surface shape of each aspherical lens satisfies the formula (9) in Embodiment 1. Tables 10-1 and 10-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 5.

[0201] Table 10-1

[0202] Face number K A4 A6 A8 A10 E11 -6.47566E-01 -4.01821E-05 -1.39525E-05 3.47962E-06 -1.07777E-07 E12 -1.54744E+01 -5.99043E-04 2.60676E-04 -5.76262E-05 3.67315E-06 E21 1.33300E+01 -4.30012E-03 6.01717E-04 -9.36235E-06 4.62695E-06 E22 -1.47640E+01 -3.34178E-03 1.07301E-03 -6.94515E-05 2.78838E-06 E31 7.14174E+00 -2.10552E-04 9.91418E-05 -1.57729E-06 -3.61670E-07 E32 1.48639E+00 -2.31380E-04 -1.29831E-05 1.18189E-05 -8.18336E-07 E41 -1.02638E+01 7.94670E-05 -1.16473E-05 -1.73640E-06 2.41475E-07 E42 6.39553E+01 -3.60011E-04 3.05816E-04 -3.63424E-05 1.81209E-06 E51 -1.47526E+02 -7.13483E-04 2.63448E-04 -9.95002E-06 2.71507E-06 E52 9.97714E+01 -1.30532E-04 -1.86895E-05 -1.20318E-05 6.70407E-08 E61 4.65753E+01 -7.06065E-04 -3.52349E-05 1.83343E-06 -1.17021E-06 E62 5.43670E-01 -3.72809E-04 -8.99236E-06 -5.53001E-06 8.07020E-07 E71 -2.18052E+00 -2.12017E-03 6.88380E-07 -5.58176E-06 4.40724E-07 E72 -2.60163E+01 -3.62553E-04 4.51335E-06 5.92172E-07 -1.16802E-07

[0203] Table 10-2

[0204] Face number A12 A14 A16 A18 A20 E11 1.26521E-08 -3.66838E-10 6.07904E-12 -1.93273E-13 4.13090E-15 E12 -2.15221E-07 4.17738E-09 -1.11933E-11 1.98598E-12 -2.00018E-14 E21 -3.91222E-08 1.09414E-09 1.14192E-12 7.99945E-16 -1.66361E-15 E22 -2.72561E-08 4.41114E-11 3.38220E-13 3.82091E-15 3.08561E-15 E31 4.49112E-08 -3.33466E-11 -2.36323E-13 6.59925E-14 -3.58655E-16 E32 7.98911E-09 -1.21569E-10 1.44443E-11 4.89766E-13 -1.60482E-14 E41 -1.44163E-07 7.07913E-09 -1.81385E-10 0.00000E+00 0.00000E+00 E42 -1.54392E-07 4.62303E-09 -6.72310E-11 0.00000E+00 0.00000E+00 E51 -4.60534E-08 3.58168E-10 -1.88723E-11 0.00000E+00 0.00000E+00 E52 -1.47930E-08 5.43439E-10 -8.01421E-12 0.00000E+00 0.00000E+00 E61 4.81524E-08 -2.75257E-09 4.82201E-11 0.00000E+00 0.00000E+00 E62 -1.68548E-08 1.29358E-10 -1.62087E-11 0.00000E+00 0.00000E+00 E71 -3.45275E-08 1.52691E-09 -2.83643E-11 0.00000E+00 0.00000E+00 E72 2.95701E-09 -1.54967E-10 9.86111E-13 0.00000E+00 0.00000E+00

[0205] Incident light passes through as Figure 21 and Figure 22 The aperture ST0 shown intercepts some light rays, allowing some light to enter from the object-side surface E11 of the first lens L1. The incident light rays pass through each lens in sequence and exit from the image-side surface E72 of the seventh lens L7. The outgoing light rays enter from the object-side surface IR1 of the filter L8 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L8, are incident on the imaging surface L9, which senses the incident light rays and generates a corresponding electronic image.

[0206] Figure 23 The image astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focused at infinity. Figure 24 The image astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro are shown.

[0207] Among them, the astigmatism curve is used to represent the meridional image plane curvature and the sagittal image plane curvature, and the distortion curve is used to represent the distortion magnitude corresponding to different image heights. In Example 5, the wavelength of the reference light used for testing is 555nm. According to Figure 23 and Figure 24 It can be seen that, at this reference wavelength, the imaging lens 210 given in Embodiment 5 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0208] In summary, based on the parameter design of the imaging lens 210 given in the above embodiments one to five, and referring to Table 11, embodiments one to five respectively satisfy the aforementioned relation (1) to relation (8).

[0209] Table 11

[0210] relational expression Example 1 Example 2 Example 3 Example 4 Example 5 |(FG1-FG2) / FG3| 0.46 0.39 0.53 0.86 0.99 f1 / Finf 0.79 0.79 0.79 0.66 0.66 f2 / FG1 -1.49 -1.44 -1.55 -2.01 -1.98 CT3*(R32 / R31) 0.61 0.63 0.54 0.58 0.75 f5 / FG2 -1.38 -1.27 -1.52 -1.76 -5.47 (f6-f4) / FG2 0.30 0.36 0.48 0.48 0.11 FG3 / R72 -1.28 -1.36 -0.91 -0.54 -0.47 Finf / Fmac 1.28 1.29 1.27 1.24 1.35

[0211] Figure 25 This is a schematic diagram of the structure of an electronic device in the thickness direction according to an embodiment of this application; Figure 26 This is a schematic diagram of an electronic device according to an embodiment of this application.

[0212] In addition to providing the aforementioned imaging lens and camera module, this application also provides an electronic device, such as... Figure 25 and Figure 26 As shown, the electronic device includes a front panel 310, a middle frame 320, a rear cover 330, and a camera module 200 containing any of the aforementioned imaging lenses. The front panel 310 is provided with a display screen 311, the middle frame 320 is disposed between the front panel 310 and the rear cover 330, and the rear cover 330 is provided with a camera hole 331. The camera module 200 is disposed in the electronic device through the camera hole 331, and the optical axis 201 of the imaging lens in the camera module 200 is parallel to the thickness direction of the electronic device.

[0213] In this embodiment, the cavity formed by the front panel 310, the middle frame 320 and the rear cover 330 also includes electronic components 340. The electronic components 340 include, but are not limited to, processors, antennas, sensors, gyroscopes, speakers and other devices, so that the electronic device can display images or videos obtained by the camera module 200 through the display screen 311.

[0214] It should be understood that the camera module 200 installed in the electronic device through the camera hole 331 on the back cover 330 can act as the rear camera of the electronic device to receive incident light located on the side of the back cover 330 away from the front panel 310 in order to generate a corresponding electronic image.

[0215] In some embodiments, the camera module 200 can also serve as a front-facing camera for the electronic device. For example, a camera hole can be provided on the front panel 310 of the electronic device, and the camera module 200 can be mounted through the camera hole on the front panel 310 to receive incident light located on the side of the front panel 310 away from the rear cover 330, so as to generate a corresponding electronic image.

[0216] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. An imaging lens, characterized in that, The imaging lens consists of a first lens group, a second lens group, and a third lens group sequentially from the object side to the image side along the optical axis. The first lens group consists of a first lens with positive refractive power, a second lens with negative refractive power, and a third lens with negative refractive power, sequentially from the object side to the image side along the optical axis. The object side of the first lens is convex near the optical axis, and the image side of the first lens is also convex near the optical axis. The object side of the second lens is convex near the optical axis, and the image side of the second lens is concave near the optical axis. The object side of the third lens is convex near the optical axis, and the image side of the third lens is concave near the optical axis. The second lens group consists of a fourth lens with positive refractive power, a fifth lens with negative refractive power, and a sixth lens with positive refractive power, arranged sequentially from the object side to the image side along the optical axis; the object side of the fourth lens is convex near the optical axis; the image side of the fifth lens is concave near the optical axis. The third lens group is composed of a seventh lens with negative refractive power; the object side of the seventh lens is concave near the optical axis, and the image side of the seventh lens is concave near the optical axis. Wherein, the positions of the first lens group and the third lens group are fixed relative to the imaging surface of the camera module, the second lens group is disposed between the first lens group and the third lens group, and the second lens group is configured to be movable along the optical axis between the first lens group and the third lens group; The effective focal length FG1 of the first lens group, the effective focal length FG2 of the second lens group, and the effective focal length FG3 of the third lens group satisfy: 0.2 < |(FG1-FG2) / FG3| < 2; The effective focal length f4 of the fourth lens, the effective focal length f6 of the sixth lens, and the effective focal length FG2 of the second lens group satisfy: 0 < (f6-f4) / FG2 < 1.

2. The imaging lens according to claim 1, characterized in that, The effective focal length f1 of the first lens satisfies the same condition as the effective focal length Finf of the imaging lens when focused at infinity: 0.

3. <f1 / Finf<1.5。 3. The imaging lens according to claim 1, characterized in that, The effective focal length f2 of the second lens satisfies the same condition as the effective focal length FG1 of the first lens group: -4 <f2 / FG1<-1。 4. The imaging lens according to claim 1, characterized in that, The central thickness CT3 of the third lens on the optical axis, the radius of curvature R31 of the object-side surface of the third lens, and the radius of curvature R32 of the image-side surface of the third lens satisfy: 0.3 <CT3*(R32 / R31)<1.5。 5. The imaging lens according to claim 1, characterized in that, The effective focal length f5 of the fifth lens satisfies the same condition as the effective focal length FG2 of the second lens group: -10 <f5 / FG2<-1。 6. The imaging lens according to claim 1, characterized in that, The effective focal length FG3 of the third lens group satisfies the following condition with the radius of curvature R72 of the image-side surface of the seventh lens: -2 <FG3 / R72<-0.2。 7. The imaging lens according to claim 1, characterized in that, The effective focal length Finf of the imaging lens when focusing at infinity and the effective focal length Fmac of the imaging lens when focusing at macro satisfy: 0 <Finf / Fmac<1.5。 8. A camera module, characterized in that, From the object side to the image side, it includes, in sequence: an aperture stop, an imaging lens as described in any one of claims 1-7, and an imaging plane.

9. An electronic device, characterized in that, Includes a front panel, a mid-frame, a rear cover, and, as described in claim 8, a camera module, wherein: The front panel is equipped with a display screen, the middle frame is disposed between the front panel and the rear cover, and the rear cover is equipped with a camera hole; The camera module is disposed in the electronic device through the camera hole, and the optical axis of the imaging lens in the camera module is parallel to the thickness direction of the electronic device.

Images