Imaging lens, camera module and electronic equipment

Abstract

The invention provides an imaging lens, a camera module and electronic equipment, the imaging lens sequentially comprises a first lens group, a second lens group and a third lens group from an object side to an image side along an optical axis, the first lens group comprises 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 comprises 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 comprises a seventh lens with negative refractive power. 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 can move between the first lens group and the third lens group along the optical axis, and the imaging lens satisfies 0.2 lt; (FG1-FG2) / FG3lt; 2. According to the imaging lens, the camera module and the electronic equipment provided by the invention, the characteristics of long focus, large aperture and large target surface can be realized, and the shooting quality of the imaging lens in different environments and conditions is improved.

Description

Technical Field

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

[0002] With the development of camera equipment technology, more and more mobile terminal devices have camera functions. Users' requirements for the camera functions of mobile terminals are also becoming more diversified, and they expect mobile terminals to achieve good shooting effects in long-range, macro and dark light scenes.

[0003] For mobile terminal devices, such as mobile phones, in order to make it easier for users to carry and use the terminal devices, as well as to improve the aesthetics of the terminal devices, the thickness of the terminal devices will be gradually reduced, resulting in an increasingly narrow internal space of the terminal devices in the thickness direction. Usually, a camera module is arranged in the thickness direction of the terminal device, and the narrow internal space of the terminal device in the thickness direction will seriously limit the overall size of the camera module.

[0004] In order to achieve good photographic effects in long-range, macro and low-light scenes, it is necessary to use telephoto lenses and other camera modules for imaging. Traditional telephoto lenses use motors to move the entire lens to achieve focus, which is not conducive to the miniaturization of camera modules. In addition, the image quality of telephoto lenses is very poor at macro distances, and the telephoto macro shooting effect is poor. At the same time, due to the requirements of the module volume in mobile terminals, telephoto lenses have a large aperture and a small target surface, and the low-light shooting effect is poor. Summary of the invention

[0005] The embodiments of the present application provide an imaging lens, a camera module and an electronic device to solve the problem that the macro and low-light shooting effects of the telephoto lens configured in the mobile terminal are poor.

[0006] In a first aspect, an embodiment of the present application provides an imaging lens, which includes a first lens group, a second lens group and a third lens group in sequence from the object side to the image side along the optical axis; 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 in sequence from the object side to the image side along the optical axis; 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 in sequence from the object side to the image side along the optical axis; 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 long focal length and large aperture, 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 infinite object distance to 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, make the light entering the imaging lens transition smoothly, make the trend of the light more smooth, so as to realize the characteristics of large aperture and 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 of view angle range of the imaging lens, and further realize the characteristics of long focal length and large aperture, 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 to balance the aberration of the imaging lens and improve 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 to achieve 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 telephoto state and the close-focus state, the moving distance of the second lens group on the optical axis can be restricted, the focusing stroke can be shortened, and the miniaturization of the module size can be achieved.

[0017] In a second aspect, an embodiment of the present application provides a camera module, which includes, from the object side to the image side, an aperture, an imaging lens as described above, and an imaging surface. According to the above-mentioned camera module, the camera module with the imaging lens has the characteristics of a long focal length, a large aperture, and a large target surface on the basis of a miniaturized structure, thereby improving the imaging performance of the camera module.

[0018] In a third aspect, an embodiment of the present application provides an electronic device, comprising a front panel, a middle frame, a back cover, and a camera module as described above, wherein: a display screen is provided on the front panel, the middle frame is provided between the front panel and the back cover, and a camera hole is provided on the back cover; the camera module is provided in the electronic device through the camera hole, and the optical axis direction of the imaging lens in the camera module is parallel to the thickness direction of the electronic device. Thus, the camera module can be provided in the electronic device, and miniaturization can be achieved through the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

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

[0021] Figure 2 Schematic diagram of the internal structure of the camera module 150;

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

[0023] Figure 4 A schematic diagram of the structure of another camera module 200 provided in an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of the imaging lens 210 provided in the first embodiment of the present application when focusing at infinity;

[0025] Figure 6 This is a schematic diagram of the structure of the imaging lens 210 provided in the first embodiment of the present application when focusing on a macro distance;

[0026] Figure 7 The astigmatism curve and the distortion curve of the imaging lens 210 provided in the first embodiment of the present application when focusing at infinity;

[0027] Figure 8The astigmatism curve and distortion curve of the imaging lens 210 provided in the first embodiment of the present application when focusing at a macro distance;

[0028] Fig. 9 This is a schematic diagram of the structure of the imaging lens 210 provided in the second embodiment of the present application when focusing at infinity;

[0029] Fig.10 This is a schematic diagram of the structure of the imaging lens 210 provided in the second embodiment of the present application when focusing on a macro distance;

[0030] Fig.11 The astigmatism curve and the distortion curve of the imaging lens 210 provided in the second embodiment of the present application when focusing at infinity;

[0031] Fig.12 The astigmatism curve and distortion curve of the imaging lens 210 provided in the second embodiment of the present application when focusing at a macro distance;

[0032] Fig.13 This is a schematic diagram of the structure of the imaging lens 210 provided in the third embodiment of the present application when focusing at infinity;

[0033] Fig.14 This is a schematic diagram of the structure of the imaging lens 210 provided in the third embodiment of the present application when focusing on a macro distance;

[0034] Fig.15 The astigmatism curve and distortion curve of the imaging lens 210 provided in the third embodiment of the present application when focusing at infinity;

[0035] Fig.16 The astigmatism curve and distortion curve of the imaging lens 210 provided in the third embodiment of the present application when focusing at a macro distance;

[0036] Fig.17 This is a schematic diagram of the structure of the imaging lens 210 provided in the fourth embodiment of the present application when focusing at infinity;

[0037] Fig.18 This is a schematic diagram of the structure of the imaging lens 210 provided in the fourth embodiment of the present application when focusing on a macro distance;

[0038] Fig.19 An astigmatism curve diagram and a distortion curve diagram of the imaging lens 210 provided in the fourth embodiment of the present application when focusing at infinity;

[0039] Fig. 20 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fourth embodiment of the present application when focusing at a macro distance;

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

[0041] Fig. 22 This is a schematic diagram of the structure of the imaging lens 210 provided in Embodiment 5 of the present application when focusing on a macro distance;

[0042] Fig.23 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fifth embodiment of the present application when focusing at infinity;

[0043] Fig.24 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fifth embodiment of the present application when focusing at a macro distance;

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

[0045] Fig.26 This is a schematic diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making creative work all belong to the protection scope of the present application.

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

[0048] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components in the drawings.

[0049] In the drawings, for the sake of convenience, the thickness, size, proportion and other parameters of the lens are exaggerated. Therefore, the thickness, size, shape and other parameters of the spherical or aspherical surface shown in the drawings are only for illustration and do not represent the actual shape of the aspherical or aspherical surface. In other words, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings.

[0050] In the embodiment of the present application, the central area of ​​the lens is the paraxial area, that is, the area near the optical axis. The edge area of ​​the lens is the distal area, that is, the area of ​​the lens far from the optical axis. If the surface of the lens is convex and the position of the convex surface is not defined, it means that the surface of the lens is convex at least in the central area. If the surface of the lens is concave and the position of the concave surface is not defined, it means that the surface of the lens is concave at least in the central area.

[0051] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The embodiments of this application will be described in detail below in conjunction with the accompanying drawings.

[0052] With the development of camera equipment technology, more and more mobile terminal devices have camera functions, such as smart phones, tablet computers, video cameras, digital cameras, etc., all of which are equipped with camera modules to realize the camera function. The present application embodiment is described by taking a smart phone as an example.

[0053] Figure 1 FIG. 1 is a schematic diagram of the structure of an electronic device with an electronic camera function in the thickness direction. Figure 1 As shown, the electronic device 100 includes a front panel 110, a middle frame 120, a back cover 130, an electronic component 140 and a camera module 150, wherein the front panel 110, the middle frame 120 and the back cover 130 enclose a cavity, and the electronic component 140 and the camera module 150 are arranged in the cavity.

[0054] In the embodiment of the present application, the camera module 150 may be the front camera and / or the rear camera of the electronic device 100 , and the specific setting position of the camera module 150 is not limited in the present application.

[0055] Figure 2 is a schematic diagram of the internal structure of the camera module 150, such as 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, a conductive cloth, a rigid-flex board, a connector, etc., which are not listed here one by one.

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

[0057] The image sensor 153 includes a photosensitive element, such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The image sensor 153 is used to sense the light focused by the imaging lens 152 and form an electronic image corresponding to the scene on an imaging surface, wherein the imaging surface is a surface of the image sensor 153 facing the lens 1521.

[0058] As the number of lenses 1521 in the imaging lens 152 increases, the imaging lens 152 has a higher ability to converge light, which can effectively improve the resolution and contrast of the imaging lens 152, and can also improve the anti-glare effect and imaging quality of the imaging lens 152. However, correspondingly, the thickness of the imaging lens 152 will also be greater.

[0059] In order to facilitate the user's hand-holding and improve the aesthetics of the electronic device 100, the size of the electronic device 100 in the thickness direction will be gradually reduced. In order to adapt to the reduced size of the electronic device 100 in the thickness direction, the size of the camera module 150 in the thickness direction of the electronic device 100 also needs to be reduced, and accordingly, the size of the imaging lens 152 in the thickness direction of the electronic device 100 also needs to be reduced.

[0060] On this basis, as users' requirements for photographic effects increase, in order to achieve good photographic effects in distant scenes, macro scenes, and dark scenes, it is necessary to use a camera module 150 with a telephoto lens for imaging. However, the traditional telephoto lens uses a motor to move the entire lens to achieve focus, which is not conducive to the miniaturization of the camera module 150. Moreover, the focus is achieved by moving the lens with a motor, and the imaging quality of the telephoto lens is very poor at macro distances, and the telephoto macro shooting effect is poor. At the same time, due to the requirements of the module volume in the mobile terminal, the miniaturized telephoto lens has a small aperture and a small target surface, and the dark light shooting effect is poor.

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

[0062] Figure 3A schematic diagram of the structure of a camera module 200 provided in an embodiment of the present application is shown in FIG. Figure 4 A schematic diagram of the structure of another camera module 200 provided in an embodiment of the present application.

[0063] In the embodiments of the present application, Figure 3 As shown, the camera module 200 includes an aperture ST0, an imaging lens 210 and an imaging surface L9 in sequence from the object side to the image side along the optical axis 201. Figure 4 As shown, the camera module 200 may further include a filter L8, and the filter L8 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 in sequence from the object side to the image side along the optical axis 201, wherein the first lens group 211 includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis 201, the second lens group 212 includes a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the object side to the image side along the optical axis 201, and the third lens group 213 includes a seventh lens L7.

[0065] Among them, 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 between the first lens group 211 and the third lens group 213 along the optical axis 201.

[0066] It should be understood that in the embodiment of the present application, the object side refers to the side close to the photographed scene, and the image side refers to the side close to the image sensor. Therefore, each lens in the imaging lens 210 has an object side and an image side, wherein the object side refers to the mirror surface of the lens facing the object side, and the image 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 sheet structure that can block light incident from the edge of the imaging lens 210. It should be understood that the larger the aperture of the aperture ST0, the higher the light flux, and the smaller the aperture of the aperture ST0, the lower the light flux.

[0068] In some embodiments, the filter L8 also has an object side surface IR1 and an image side surface IR2, and 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 double filter, etc. The specific type of the filter L8 is not limited in the embodiments of the present application.

[0069] In actual applications, before the incident light enters the imaging lens 210, some marginal light will be intercepted by the aperture ST0 and cannot enter the imaging lens 210. The incident light that is not intercepted by the aperture ST0 enters from the object side surface E11 of the first lens L1, and then passes through each subsequent lens in sequence and exits from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and exits through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the light and generates a corresponding electronic image.

[0070] In the embodiment of the present application, in order to improve the imaging quality of the camera module 200, 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] Further, the object-side surface E11 of the first lens L1 is convex at the near optical axis 201, and the image-side surface E12 of the first lens L1 is convex at the near optical axis 201; the object-side surface E21 of the second lens L2 is convex at the near optical axis 201, and the image-side surface E22 of the second lens L2 is concave at the near optical axis 201; the object-side surface E31 of the third lens L3 is convex at the near optical axis 201, and the image-side surface E32 of the third lens L3 is concave at the near optical axis 201; the object-side surface E41 of the fourth lens L4 is convex at the near optical axis 201, and the image-side surface E42 of the fourth lens L4 is concave at the near optical axis 201. The optical axis 201 may be a convex surface or a concave surface; the object-side surface E51 of the fifth lens L5 may be a convex surface or a concave surface at the near optical axis 201, and the image-side surface E52 of the fifth lens L5 may be a concave surface or a convex surface at the near optical axis 201; the object-side surface E61 of the sixth lens L6 may be a convex surface or a concave surface at the near optical axis 201, and the image-side surface E62 of the sixth lens L6 may be a convex surface or a concave surface at the near optical axis 201; the object-side surface E71 of the seventh lens L7 is a concave surface at the near optical axis 201, and the image-side surface E72 of the seventh lens L7 is a concave surface at the near optical axis 201.

[0072] It should be noted that the concavo-convex of the object side of the lens is based on the image side, the object side is curved away from the image side to be convex, and the object side is curved toward the image side to be concave. The concavo-convex of the image side of the lens is based on the object side, the image side is curved toward the object side to be concave, and the image side is curved away from the object side to be convex.

[0073] Different lenses can have different optical properties by matching the surface design of different lenses. Among them, the first lens L1 with positive refractive power can quickly converge the incident light, converge the aperture of the imaging lens 210, and at the same time receive incident light at a larger angle, increase the field of view of the imaging, and achieve the characteristics of long focal length, large aperture, and large target surface.

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

[0075] The third lens L3 with negative refractive power can reduce the astigmatism of the imaging lens 210 , so that the incident light can smoothly transition to the second lens group 212 .

[0076] The fourth lens L4 with positive refractive power can balance the field curvature and astigmatism generated by the imaging lens 210 .

[0077] The fifth lens L5 with negative refractive power can reduce the aberration and chromatic aberration produced by the imaging lens 210, and cooperate with other lenses in the second lens group 212 to shorten the focusing stroke.

[0078] The sixth lens L6 with positive refractive power can further converge the incident light, thereby reducing the deviation of the incident angle and the exit angle of the light of the imaging lens 210 in different fields of view.

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

[0080] Exemplarily, 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 the first lens group 211, the second lens group 212 and the 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 larger angle, converge the aberration and chromatic aberration of the imaging lens 210, achieve the characteristics of long focus, large aperture, and large target surface, and improve the imaging performance of the imaging lens 210. At the same time, the effective focal length of the first lens group 211, the second lens group 212 and the third lens group 213 is designed, which can better balance the aberration of the imaging lens 210 under different object distances, and improve the imaging quality of the imaging lens 210 from infinite object distance to close focus object 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. At the same time, combined with the surface design of the first lens L1, the first lens L1 can also enable the imaging lens 210 to receive incident light at a larger angle, expand the field of view of the imaging lens 210, and thus achieve the characteristics of a long focal length, a large aperture, and a 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 incident through the first lens L1, reduce the bending angle of the light incident at a large angle, and help balance the axial chromatic aberration of the imaging lens 210, reduce the influence of edge light on imaging, improve the imaging performance of the entire system and avoid the purple fringing phenomenon during imaging.

[0089] In some embodiments, a central thickness CT3 of the third lens L3 on the optical axis 201, a curvature radius R31 of an object-side surface E31 of the third lens L3, and a curvature radius R32 of an image-side surface E32 of the third lens L3 satisfy equation (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 among 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 so that the second lens group 212 has a suitable positive focal 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 and 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 to balance the aberrations of the imaging lens 210 and improve the imaging performance of the imaging lens 210 at different object distances.

[0098] In some embodiments, the effective focal length FG3 of the third lens group 213 and the curvature radius 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 and the curvature radius R72 of the image 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 to achieve a large target surface design.

[0101] In some embodiments, the effective focal length Finf of the imaging lens 210 when focusing on infinity and the effective focal length Fmac of the imaging lens 210 when focusing on 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 far focus state and the near focus state, the moving 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, that is, at least one mirror surface from 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 surface. The aspherical lens has the characteristic of continuously changing curvature from the center of the lens to the edge of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the edge of the lens, the aspherical lens has a better curvature radius characteristic and has the advantage of improving aberrations. After using an aspherical lens, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging 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 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 are aspherical mirror surfaces.

[0107] In some embodiments, each lens may be a plastic lens, so as to achieve the thinness of the imaging lens 210 and facilitate the processing of the complex surface of each lens. In other embodiments, each lens may be a glass lens, so that the imaging lens 210 has a good optical effect and can also reduce the temperature sensitivity of the imaging lens 210.

[0108] In some embodiments, each lens includes at least one glass lens. Exemplarily, the first lens L1 in the imaging lens 210 may be a glass lens, and the rest may be plastic lenses. Compared with plastic lenses, glass lenses have a lower dispersion coefficient based on a higher refractive index, so that the first lens L1 can reduce its temperature sensitivity while having good optical performance, so that the imaging lens 210 can be used in more environments. The above-mentioned lens materials are only exemplary descriptions in this application, and the specific material composition of each lens is not limited in this application.

[0109] Therefore, the imaging lens 210 provided in the embodiment of the present application can not only increase the amount of light entering the lens and enhance the image quality in a dark environment, but also avoid adverse effects such as overexposure in a bright environment. By reasonably allocating the refractive power, surface shape, material, size, etc. of each lens in the imaging lens, the incident light can be effectively converged, and aberrations and astigmatism can be reduced, so that the imaging lens 210 can adapt to the size of the terminal device in the thickness direction, and the imaging quality of the imaging lens 210 in a complex light environment can be effectively improved, and the convenience of processing and assembly of each lens can be effectively improved. Correspondingly, the camera module 200 provided in the embodiment of the present application can also have the characteristics of long focal length, large aperture, large target surface and high imaging quality on the basis of adapting to the size of the terminal device in the thickness direction.

[0110] Some optional embodiments of the imaging lens 210 will be described in detail below in combination with specific parameters.

[0111] Embodiment 1

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

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

[0114] Table 1 shows basic parameters of the camera module 200 of the first embodiment, wherein the units of the 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 value corresponding to the object side of the lens and the filter is the central thickness of the lens or the filter, that is, the thickness of the lens or the filter on the optical axis 201; and the value corresponding to the image side of the lens and the filter is the spatial interval between the lens or the filter and the object side of the rear component on the optical axis 201.

[0119] As shown in Table 1, when the imaging lens 210 is focused 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 0.98 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 5.77 mm. When the imaging lens 210 is focused at a macro distance, 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 4.44 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 2.31 mm.

[0120] In the first embodiment, the effective focal length Finf of the imaging lens 210 when focusing on infinity is 19.89 mm, and the effective focal length Fmac of the imaging lens 210 when focusing on macro is 15.57 mm. The F number FNOinf of the imaging lens 210 when focusing on infinity is 1.78, and the F number FNOmac of the imaging lens 210 when focusing on macro is 1.43. The field of view FOVinf of the imaging lens 210 when focusing on infinity is 17.36°, and the field of view FOVmac of the imaging lens 210 when focusing on 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 a macro distance, the distance between the lens and the object plane is less than or equal to 12 cm.

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

[0123]

[0124] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is 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 curvature radius R in Table 1), k is the cone coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror surface in Example 1.

[0125] Table 2-1

[0126]

[0127]

[0128] Table 2-2

[0129] Surface 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] The incident light passes through Figure 5 and Figure 6 The stop ST0 shown intercepts part of the light entering from the object side surface E11 of the first lens L1, and the incident light passes through each lens in sequence and is emitted from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and is emitted through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the incident light and generates a corresponding electronic image.

[0131] Figure 7 The astigmatism curve and the distortion curve of the imaging lens 210 provided in the first embodiment of the present application when focusing at infinity. Figure 8 The astigmatism curve and distortion curve of the imaging lens 210 provided in the first embodiment of the present application when focusing at a macro distance.

[0132] The astigmatism curve is used to represent the meridional image curvature and the sagittal image curvature, and the distortion curve is used to represent the distortion magnitude values ​​corresponding to different image heights. In the first embodiment, the wavelength of the reference light used for testing is 555nm. Figure 7 and Figure 8 It can be seen that, at the reference wavelength, the imaging lens 210 provided in the first embodiment can well compensate and correct astigmatism and distortion, so that the imaging lens 210 can achieve good imaging quality.

[0133] Embodiment 2

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

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

[0136] Table 3 shows basic parameters of the camera module 200 of the second embodiment, wherein the units of the curvature radius, thickness and focal length are all millimeters (mm).

[0137] Table 3

[0138]

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

[0140] As shown in Table 3, when the imaging lens 210 is focused 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 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 the imaging lens 210 is focused at a macro distance, 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 the second embodiment, the effective focal length Finf of the imaging lens 210 when focusing on infinity is 20 mm, and the effective focal length Fmac of the imaging lens 210 when focusing on macro is 15.55 mm. The F number FNOinf of the imaging lens 210 when focusing on infinity is 1.8, and the F number FNOmac of the imaging lens 210 when focusing on macro is 1.46. The field of view FOVinf of the imaging lens 210 when focusing on infinity is 17.35°, and the field of view FOVmac of the imaging lens 210 when focusing on macro is 16.3°. The effective focal length FG1 of the first lens group 211 is 29.18 mm, the effective focal length FG2 of the second lens group 212 is 22.77 mm, and the effective focal length FG3 of the third lens group 213 is -16.32 mm.

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

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

[0144] Table 4-1

[0145] Surface 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] Surface 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] The incident light passes through Fig. 9 and Fig.10 The stop ST0 shown intercepts part of the light entering from the object side surface E11 of the first lens L1, and the incident light passes through each lens in sequence and is emitted from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and is emitted through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the incident light and generates a corresponding electronic image.

[0149] Fig.11 The astigmatism curve and distortion curve of the imaging lens 210 provided in the second embodiment of the present application when focusing at infinity. Fig.12 The astigmatism curve and distortion curve of the imaging lens 210 provided in the second embodiment of the present application when focusing at a macro distance.

[0150] The astigmatism curve is used to represent the meridional image curvature and the sagittal image curvature, and the distortion curve is used to represent the distortion values ​​corresponding to different image heights. In the second embodiment, the wavelength of the reference light used for testing is 555nm. Fig.11 and Fig.12 It can be seen that, at the reference wavelength, the imaging lens 210 provided in the second embodiment can well compensate and correct astigmatism and distortion, so that the imaging lens 210 can achieve good imaging quality.

[0151] Embodiment 3

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

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

[0154] Table 5 shows basic parameters of the camera module 200 of the third embodiment, wherein the units of the 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 value corresponding to the object side of the lens and the filter is the central thickness of the lens or the filter, that is, the thickness of the lens or the filter on the optical axis 201; and the value corresponding to the image side of the lens and the filter is the spatial interval between the lens or the filter and the object side of the rear component on the optical axis 201.

[0159] As shown in Table 5, when the imaging lens 210 is focused 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 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 the imaging lens 210 is focused at a macro distance, 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 the third embodiment, the effective focal length Finf of the imaging lens 210 when focusing on infinity is 19.75 mm, and the effective focal length Fmac of the imaging lens 210 when focusing on macro is 15.54 mm. The F number FNOinf of the imaging lens 210 when focusing on infinity is 1.79, and the F number FNOmac of the imaging lens 210 when focusing on macro is 1.45. The field of view FOVinf of the imaging lens 210 when focusing on infinity is 17.43°, and the field of view FOVmac of the imaging lens 210 when focusing on 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 a macro distance, the distance between the lens and the object plane is less than or equal to 12 cm.

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

[0163] Table 6-1

[0164] Surface 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] The incident light passes through Fig.13 and Fig.14 The stop ST0 shown intercepts part of the light entering from the object side surface E11 of the first lens L1, and the incident light passes through each lens in sequence and is emitted from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and is emitted through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the incident light and generates a corresponding electronic image.

[0169] Fig.15 The astigmatism curve and distortion curve of the imaging lens 210 provided in the third embodiment of the present application when focusing at infinity. Fig.16 The astigmatism curve and distortion curve of the imaging lens 210 provided in the third embodiment of the present application when focusing at a macro distance.

[0170] The astigmatism curve is used to represent the meridional image curvature and the sagittal image curvature, and the distortion curve is used to represent the distortion values ​​corresponding to different image heights. In the third embodiment, the wavelength of the reference light used for testing is 555nm. Fig.15 and Fig.16 It can be seen that, at the reference wavelength, the imaging lens 210 provided in the third embodiment can well compensate and correct astigmatism and distortion, so that the imaging lens 210 can achieve good imaging quality.

[0171] Embodiment 4

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

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

[0174] Table 7 shows basic parameters of the camera module 200 of the fourth embodiment, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0175] Table 7

[0176]

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

[0178] As shown in Table 7, when the imaging lens 210 is focused 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 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 the imaging lens 210 is focused at a macro distance, 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 the fourth embodiment, the effective focal length Finf of the imaging lens 210 when focusing on infinity is 19.7 mm, and the effective focal length Fmac of the imaging lens 210 when focusing on macro is 15.88 mm. The F number FNOinf of the imaging lens 210 when focusing on infinity is 1.75, and the F number FNOmac of the imaging lens 210 when focusing on macro is 1.42. The field of view FOVinf of the imaging lens 210 when focusing on infinity is 17.46°, and the field of view FOVmac of the imaging lens 210 when focusing on 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 a macro distance, the distance between the lens and the object plane is less than or equal to 15 cm.

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

[0182] Table 8-1

[0183]

[0184]

[0185] Table 8-2

[0186] Surface 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] The incident light passes through Fig.17 and Fig.18The stop ST0 shown intercepts part of the light entering from the object side surface E11 of the first lens L1, and the incident light passes through each lens in sequence and is emitted from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and is emitted through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the incident light and generates a corresponding electronic image.

[0188] Fig.19 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fourth embodiment of the present application when focusing at infinity. Fig. 20 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fourth embodiment of the present application when focusing at a macro distance.

[0189] The astigmatism curve is used to represent the meridional image curvature and the sagittal image curvature, and the distortion curve is used to represent the distortion values ​​corresponding to different image heights. In the fourth embodiment, the wavelength of the reference light used for testing is 555nm. Fig.19 and Fig. 20 It can be seen that, at the reference wavelength, the imaging lens 210 provided in the fourth embodiment can well compensate and correct astigmatism and distortion, so that the imaging lens 210 can achieve good imaging quality.

[0190] Embodiment 5

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

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

[0193] Table 9 shows basic parameters of the camera module 200 of the fifth embodiment, wherein the units of the curvature radius, thickness and focal length are all millimeters (mm).

[0194] Table 9

[0195]

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

[0197] As shown in Table 9, when the imaging lens 210 is focused 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 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 the imaging lens 210 is focused at a macro distance, 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 the fifth embodiment, the effective focal length Finf of the imaging lens 210 when focusing on infinity is 19.77 mm, and the effective focal length Fmac of the imaging lens 210 when focusing on macro is 14.67 mm. The F number FNOinf of the imaging lens 210 when focusing on infinity is 1.8, and the F number FNOmac of the imaging lens 210 when focusing on macro is 1.38. The field of view FOVinf of the imaging lens 210 when focusing on infinity is 17.43°, and the field of view FOVmac of the imaging lens 210 when focusing on 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 a macro distance, the distance between the lens and the object plane is less than or equal to 11 cm.

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

[0201] Table 10-1

[0202] Surface 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 -6.9451 5E-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+0 1 -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] Surface 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] The incident light passes through Fig.21 and Fig. 22 The stop ST0 shown intercepts part of the light entering from the object side surface E11 of the first lens L1, and the incident light passes through each lens in sequence and is emitted from the image side surface E72 of the seventh lens L7. The outgoing light enters from the object side surface IR1 of the filter L8 and is emitted through the image side surface IR2. The outgoing light filtered by the filter L8 is incident on the imaging surface L9, and the imaging surface L9 senses the incident light and generates a corresponding electronic image.

[0206] Fig.23 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fifth embodiment of the present application when focusing at infinity. Fig.24 The astigmatism curve and distortion curve of the imaging lens 210 provided in the fifth embodiment of the present application when focusing at a macro distance.

[0207] The astigmatism curve is used to represent the meridional image curvature and the sagittal image curvature, and the distortion curve is used to represent the distortion values ​​corresponding to different image heights. In Example 5, the wavelength of the reference light used for testing is 555nm. Fig.23 and Fig.24 It can be seen that, at the reference wavelength, the imaging lens 210 provided in the fifth embodiment can well compensate and correct astigmatism and distortion, so that the imaging lens 210 can achieve good imaging quality.

[0208] In summary, based on the parameter designs of the imaging lens 210 given in the above-mentioned embodiments 1 to 5, referring to Table 11, embodiments 1 to 5 respectively satisfy the above-mentioned equations (1) to (8).

[0209] Table 11

[0210] Relational Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 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] Fig.25 This is a schematic diagram of the structure of an electronic device in the thickness direction according to an embodiment of the present application; Fig.26 This is a schematic diagram of an electronic device in an embodiment of the present application.

[0212] On the basis of providing the aforementioned imaging lens and camera module, the present application also provides an electronic device, such as Fig.25 and Fig.26 As shown, the electronic device includes a front panel 310, a middle frame 320, a back cover 330 and a camera module 200 including any of the aforementioned imaging lenses, wherein a display screen 311 is provided on the front panel 310, the middle frame 320 is arranged between the front panel 310 and the back cover 330, and a camera hole 331 is provided on the back cover 330, the camera module 200 is arranged 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 an embodiment of the present application, the cavity formed by the front panel 310, the middle frame 320 and the back cover 330 also includes electronic components 340, and 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 set in the electronic device through the camera hole 331 on the back cover 330 can serve as a 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 to generate a corresponding electronic image.

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

[0216] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods 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 solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. An imaging lens, characterized in that: The lens comprises a first lens group, a second lens group and a third lens group in sequence from the object side to the image side along the optical axis; The first lens group includes, from the object side to the image side along the optical axis, a first lens having positive refractive power, a second lens having negative refractive power, and a third lens having negative refractive power; The second lens group includes, from the object side to the image side along the optical axis, a fourth lens having positive refractive power, a fifth lens having negative refractive power, and a sixth lens having positive refractive power; The third lens group includes a seventh lens having negative refractive power; Among them, 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 arranged between the first lens group and the third lens group, and the second lens group is configured to be movable between the first lens group and the third lens group along the optical axis; 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.

2. The imaging lens according to claim 1, characterized in that: The object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is convex at the near optical axis; The object side surface of the second lens is convex at the near optical axis, and the image side surface of the second lens is concave at the near optical axis; The object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is concave at the near optical axis; The object side surface of the fourth lens is convex at the near optical axis; The object side surface of the seventh lens is concave at the near optical axis, and the image side surface of the seventh lens is concave at the near optical axis.

3. The imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens satisfies the effective focal length Finf of the imaging lens when focusing at infinity: 0.3 <f1 / Finf<1.5。 4. The imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens and the effective focal length FG1 of the first lens group satisfy: <f2 / FG1<-1。 5. The imaging lens according to claim 1, wherein: 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。 6. The imaging lens according to claim 1, wherein: 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。 7. The imaging lens according to claim 1, wherein: 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.

8. The imaging lens according to claim 1, wherein: 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: <FG3 / R72<-0.2。 9. The imaging lens according to claim 1, wherein: The effective focal length Finf of the imaging lens when focusing on infinity and the effective focal length Fmac of the imaging lens when focusing on macro satisfy the following conditions: <Finf / Fmac<1.5。 10. A camera module, characterized in that: The invention comprises, from the object side to the image side, an aperture, an imaging lens as claimed in any one of claims 1 to 9, and an imaging surface.

11. An electronic device, characterized in that: The camera module comprises a front panel, a middle frame, a back cover, and the camera module as claimed in claim 10, wherein: The front panel is provided with a display screen, the middle frame is arranged between the front panel and the back cover, and the back cover is provided with a camera hole; The camera module is arranged in the electronic device through the camera hole, and the optical axis direction of the imaging lens in the camera module is parallel to the thickness direction of the electronic device.

Images