An imaging lens, a camera module and an electronic device

Abstract

The application provides an imaging lens, a camera module and an electronic device. The imaging lens comprises a first lens group and a second lens group in sequence 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 positive 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 negative refractive power. The position of the first lens group is fixed relative to an imaging surface of the camera module. The second lens group is located between the first lens group and the imaging surface. The second lens group can move along the optical axis between the first lens group and the imaging surface. The imaging lens satisfies 1<(FG1-FG2) / Finf<2. The imaging lens, the camera module and the electronic device provided by the application can realize 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 smaller apertures and smaller 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 and a second lens group in sequence 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 positive refractive power in sequence 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 negative refractive power in sequence along the optical axis from the object side to the image side.

[0007] The first lens group is fixed relative to the imaging surface of the camera module; the second lens group is located between the first lens group and the imaging surface, and the second lens group is configured to move along the optical axis between the first lens group and the imaging surface; 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 Finf of the imaging lens when focusing at infinity satisfy: 1<(FG1-FG2) / Finf<2.

[0008] According to the above imaging lens, by setting the first lens group and the second lens group and limiting the refractive power of the lenses in the two lens groups, the imaging lens can receive incident light at a larger angle, converge the spherical aberration and chromatic aberration of the imaging lens, achieve the characteristics of a long focal length and a large aperture, and improve the imaging performance of the imaging lens. At the same time, by designing the effective focal lengths of the first lens group and the second lens group and the effective focal length of the imaging lens when focused at infinity, 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 of the first lens is convex near the optical axis; the object side of the second lens is concave 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 convex near the optical axis; the object side of the fourth lens is concave near the optical axis, and the image 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 object side of the sixth lens is concave near the optical axis, and the image side of the sixth lens is concave near the optical axis. In this way, by reasonably designing the surface shapes of different lenses in the first lens group and the second 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 achieve 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 focused at infinity satisfy: 0.3 < f1 / Finf < 1. In this way, by constraining the effective focal length of the first lens, the spherical aberration of the imaging lens can be balanced and the imaging quality of the imaging lens can be improved. 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 thus achieve the characteristics of a long focal length, a large aperture and a large target surface.

[0011] In one implementation, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: -2.8 < f1 / f2 < -1.5. In this way, by constraining the effective focal lengths of the first lens and the second lens, the second lens can transition the light incident through the first lens, reduce the bending angle of the large-angle incident light, balance the coma of the imaging lens, and at the same time ensure the imaging performance of the entire system under high and low temperature conditions.

[0012] In one implementation, the effective focal length Finf of the imaging lens when focused at infinity and the effective focal length Fmac of the imaging lens when focused at macro satisfy: Finf / Fmac < 1.5. In this way, by restricting the ratio of the effective focal lengths of the imaging lens in the telephoto state and the close-focus state, the movement range of the second lens group on the optical axis is limited, and miniaturization of the imaging lens is achieved on the basis of high imaging performance.

[0013] In one implementation, the effective focal length f3 of the third lens and the effective focal length FG1 of the first lens group satisfy: 0.2 < f3 / FG1 < 1.0. In this way, by restricting the effective focal length of the third lens, the third lens can converge the light rays incident via the first lens and the second lens, reduce the deviation of marginal rays, and thus balance the spherical aberration and coma of the imaging lens, improving the imaging quality of the imaging lens with a long focal length and a large aperture.

[0014] In one implementation, the effective focal length f6 of the sixth lens and the effective focal length FG2 of the second lens group satisfy: 0.5 < f6 / FG2 < 3. In this way, by restricting the ratio of the effective focal length of the sixth lens to the effective focal length of the second lens group, the field curvature of the imaging lens can be balanced, improving the imaging performance of the imaging lens in the close-focus state.

[0015] In one implementation, the central thickness CT4 of the fourth lens on the optical axis, the curvature radius R41 of the object side surface of the fourth lens, and the curvature radius R42 of the image side surface of the fourth lens satisfy: 0.5 < CT4*(R42 / R41) < 3. In this way, by restricting the central thickness of the fourth lens and the curvature radii of the object side surface and the image side surface, the shape of the fourth lens can be controlled to effectively control the light rays, thereby balancing the field curvature and astigmatism and facilitating the realization of the feature of a large target surface, improving the imaging quality of the imaging lens.

[0016] In one implementation, the curvature radius R32 of the image side surface of the third lens and the curvature radius R41 of the object side surface of the fourth lens satisfy: 0.5 < R41 / R32 < 5. In this way, the adjacent lenses in the first lens group and the second lens group can be restricted, enabling the light rays to smoothly enter the second lens group from the first lens group, reducing the sensitivity of the assembly tolerance between the first lens group and the second lens group, lowering the assembly difficulty, and improving the imaging quality and assembly processability of the imaging lens.

[0017] In one implementation, the combined focal length f45 of the fourth lens and the fifth lens, and the spatial interval T56 between the fifth lens and the sixth lens on the optical axis satisfy: -100 < f45 / T56 < -5. In this way, by allocating the combined focal length of the fourth lens and the fifth lens in the second lens group and the spatial interval between the fifth lens and the sixth lens on the optical axis, the second lens group can balance the field curvature and astigmatism, and at the same time, a mounting position can be reserved for the structural member, facilitating the imaging lens to be arranged in the terminal device.

[0018] In one implementation, the distance BFLmin between the image side of the sixth lens and the imaging surface in the optical axis direction during macro focusing, and the distance TTL between the object side of the first lens and the imaging surface in the optical axis direction satisfy: BFLmin / TTL > 0.05. In this way, by constraining the distance between the image side of the sixth lens and the imaging surface in the near-focus state, the focusing stroke of the imaging lens can be optimized, and at the same time, the structure of the imaging lens can be optimized, facilitating the arrangement of the voice coil motor structure, thereby achieving the miniaturization of the imaging lens.

[0019] In a second aspect, an embodiment of the present application provides an imaging module, which sequentially includes, from the object side to the image side: an aperture, an imaging lens as described in any of the foregoing, and an imaging surface. According to the above imaging module, the imaging module having the imaging lens has the characteristics of a long focal length, a large aperture, and a large target surface on the basis of structural miniaturization, thereby improving the imaging performance of the imaging module.

[0020] In a third aspect, an embodiment of the present application provides an electronic device, including a front panel, a middle frame, a rear cover, and the imaging module as described above, where: a display screen is provided on the front panel, the middle frame is disposed between the front panel and the rear cover, and a camera hole is provided on the rear cover; the imaging module is disposed in the electronic device through the camera hole, and the optical axis direction of the imaging lens in the imaging module is parallel to the thickness direction of the electronic device. Thus, the electronic device can be provided with the imaging module, and further, through the imaging module, miniaturization can be achieved. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of an electronic device with an electronic imaging function in the thickness direction;

[0023] Figure 2 It is a schematic internal structure diagram of the imaging module 150;

[0024] Figure 3This is a schematic diagram of the structure of a camera module 200 provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of another camera module 200 provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing at infinity.

[0027] Figure 6 This is a schematic diagram of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro.

[0028] Figure 7 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focusing at infinity;

[0029] Figure 8 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 1 of this application when focusing on macro.

[0030] Figure 9 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing at infinity.

[0031] Figure 10 This is a schematic diagram of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro.

[0032] Figure 11 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focusing at infinity;

[0033] Figure 12 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 2 of this application when focusing on macro;

[0034] Figure 13 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing at infinity.

[0035] Figure 14 This is a schematic diagram of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro.

[0036] Figure 15 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focusing at infinity;

[0037] Figure 16 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 3 of this application when focusing on macro.

[0038] Figure 17 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing at infinity.

[0039] Figure 18 This is a schematic diagram of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro.

[0040] Figure 19 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focused at infinity;

[0041] Figure 20 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 4 of this application when focusing on macro.

[0042] Figure 21 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing at infinity.

[0043] Figure 22 This is a schematic diagram of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro.

[0044] Figure 23 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focusing at infinity;

[0045] Figure 24 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro.

[0046] Figure 25 This is a schematic diagram of the imaging lens 210 provided in Embodiment 6 of this application when focusing at infinity.

[0047] Figure 26 This is a schematic diagram of the imaging lens 210 provided in Embodiment Six of this application when focusing on macro.

[0048] Figure 27 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 6 of this application when focusing at infinity;

[0049] Figure 28 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 6 of this application when focusing at macro;

[0050] Figure 29 This is a schematic diagram of the structure of an electronic device in the thickness direction according to an embodiment of this application;

[0051] Figure 30 This is a schematic diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Figure 1This 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.

[0060] 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.

[0061] 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, and connectors, etc., which are not listed here.

[0062] 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 2 As 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Figure 3 This 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.

[0069] 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 L8 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 L7, which is disposed between the imaging lens 210 and the imaging surface L8.

[0070] like Figure 3 and Figure 4 As shown, the imaging lens 210 includes a first lens group 211 and a second lens group 212 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.

[0071] The position of the first lens group 211 is fixed relative to the imaging surface L8 of the camera module 200; the second lens group 212 is located between the first lens group 211 and the imaging surface L8, and the second lens group 212 is configured to be movable along the optical axis 201 between the first lens group 211 and the imaging surface L8.

[0072] 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, and the sixth lens L6 includes an object-side surface E61 and an image-side surface E62.

[0073] like Figure 3 and Figure 4 As 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.

[0074] In some embodiments, the filter L7 also has an object-side surface IR1 and an image-side surface IR2. The filter L7 is used to correct color deviation and / or protect the photosensitive element located on the imaging plane L8. The filter L7 may include blue glass and / or an IR-CUT dual filter, etc. The specific type of filter L7 is not limited in the embodiments of this application.

[0075] 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 E62 of the sixth lens L6. The outgoing light enters from the object side IR1 of the filter L7 and exits through the image side IR2. The outgoing light filtered by the filter L7 is incident on the imaging surface L8, where it senses the light and generates a corresponding electronic image.

[0076] In this embodiment of the application, in order to improve the imaging quality of the camera module 200, such as Figure 3As shown, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has negative refractive power, and the sixth lens L6 has negative refractive power.

[0077] 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 can be either convex or concave near the optical axis 201; the object-side surface E21 of the second lens L2 is concave 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. Convex surface; the object-side surface E41 of the fourth lens L4 is concave near the optical axis 201, and the image-side surface E42 of the fourth lens L4 is convex near the optical axis 201; the object-side surface E51 of the fifth lens L5 can be either convex or concave near the optical axis 201, and the image-side surface E52 of the fifth lens L5 is concave near the optical axis 201; 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 concave near the optical axis 201.

[0078] 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.

[0079] Different lenses 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 wider angle, thereby improving the field of view range of the image.

[0080] 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.

[0081] The third lens L3, which has positive refractive power, can reduce the incident light rays and decrease the deviation of the edge rays, thereby balancing the spherical aberration and coma of the imaging lens.

[0082] The fourth lens L4, which has positive refractive power, can balance the field curvature and astigmatism produced by the imaging lens 210.

[0083] The fifth lens L5, which has negative refractive power, can reduce aberrations and chromatic aberrations produced by the imaging lens 210.

[0084] The sixth lens L6, which has negative refractive power, can balance aberrations and field curvature, and facilitates a smooth transition of light to the imaging plane.

[0085] 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 Finf of the imaging lens 210 when focusing at infinity satisfy the relationship (1):

[0086] 1<(FG1-FG2) / Finf<2 (1)

[0087] By designing the effective focal length of the first lens group 211 and the second lens group 212 and the effective focal length of the imaging lens 210 when focusing at infinity, the imaging quality of the imaging lens can be improved from infinity object distance to near-focal distance, avoiding inconsistent imaging quality when focusing on objects at different distances.

[0088] 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):

[0089] 0.3 <f1 / Finf<1 (2)

[0090] 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.

[0091] In some embodiments, the effective focal length f1 of the first lens L1 and the effective focal length f2 of the second lens L2 satisfy the relationship (3):

[0092] -2.8 <f1 / f2<-1.5 (3)

[0093] In this way, by constraining the effective focal length of the first lens L1 and the second lens L2, the second lens L2 can transition the light rays incident through the first lens L1, reduce the bending angle of large-angle incident light rays, balance the coma of the imaging lens 210, and at the same time ensure the imaging performance of the entire system under high and low temperature conditions.

[0094] 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 (4):

[0095] Finf / Fmac < 1.5 (4)

[0096] In this way, by constraining the ratio of the effective focal length of the imaging lens 210 in the telephoto and near-focus states, the range of movement of the second lens group 212 on the optical axis 201 is limited. This achieves miniaturization of the imaging lens while maintaining high imaging performance, allowing the imaging lens 210 to be used in electronic devices with smaller thicknesses.

[0097] In some embodiments, the effective focal length f3 of the third lens L3 and the effective focal length FG1 of the first lens group 211 satisfy the relationship (5):

[0098] 0.2 <f3 / FG1<1.0 (5)

[0099] In this way, by constraining the effective focal length of the third lens L3, the third lens L3 can compress the light rays incident through the first lens L1 and the second lens L2, reduce the deviation of the edge rays, thereby balancing the spherical aberration and coma of the imaging lens 210 and improving the imaging quality of the telephoto, large-aperture imaging lens 210.

[0100] In some embodiments, 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):

[0101] 0.5 <f6 / FG2<3 (6)

[0102] In this way, by constraining the ratio of the effective focal length of the sixth lens L6 to the effective focal length of the second lens group 212, the field curvature of the imaging lens 210 can be balanced, thereby improving the imaging performance of the imaging lens 210 in near-focus mode.

[0103] In some embodiments, the center thickness CT4 of the fourth lens L4 on the optical axis 201, the radius of curvature R41 of the object side surface E41 of the fourth lens L4, and the radius of curvature R42 of the image side surface E42 of the fourth lens L4 satisfy the relationship (7):

[0104] 0.5 <CT4*(R42 / R41)<3 (7)

[0105] In this way, by constraining the center thickness of the fourth lens L4 and the curvature radii of the object side E41 and image side E42, the shape of the fourth lens L4 can be controlled, the light can be effectively controlled, thereby balancing field curvature and astigmatism, and it is beneficial to realize the features of a large target surface and improve the imaging quality of the imaging lens 210.

[0106] In some embodiments, the radius of curvature R32 of the image-side surface E32 of the third lens L3 and the radius of curvature R41 of the object-side surface E41 of the fourth lens L4 satisfy the relationship (8):

[0107] 0.5 <R41 / R32<5 (8)

[0108] In this way, the adjacent lenses in the first lens group 211 and the second lens group 212 can be constrained, so that the light can smoothly enter the second lens group 212 from the first lens group 211, reduce the sensitivity of the assembly tolerance between the first lens group 211 and the second lens group 212, reduce the assembly difficulty, and improve the imaging quality and assembly processability of the imaging lens 210.

[0109] In some embodiments, the combined focal length f45 of the fourth lens L4 and the fifth lens L5, and the spatial interval T56 of the fifth lens L5 and the sixth lens L6 on the optical axis 201, satisfy the relationship (9):

[0110] -100 <f45 / T56<-5 (9)

[0111] In this way, by allocating the combined focal length of the fourth lens L4 and the fifth lens L5 in the second lens group 212 and the spatial spacing of the fifth lens L5 and the sixth lens L6 on the optical axis 201, the second lens group 212 can balance field curvature and astigmatism, and at the same time, it can reserve assembly positions for structural components, making it convenient for the imaging lens 210 to be installed in the terminal device.

[0112] In some embodiments, during macro focusing, the distance BFLmin between the image-side surface E62 and the imaging surface L8 of the sixth lens L6 along the optical axis 201, and the distance TTL between the object-side surface E11 and the imaging surface L8 of the first lens L1 along the optical axis 201, satisfy the relationship (10):

[0113] BFLmin / TTL>0.05 (10)

[0114] In this way, by constraining the distance between the image side E62 and the imaging plane L8 of the sixth lens L6 in the near-focus state, the focusing stroke of the imaging lens 210 can be optimized. At the same time, the structure of the imaging lens 210 can also be optimized to facilitate the arrangement of the voice coil motor structure, thereby realizing the miniaturization of the imaging lens 210.

[0115] 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 E62 of the sixth lens L6 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.

[0116] 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, and the sixth lens L6 is an aspherical mirror surface.

[0117] 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, and the sixth lens L6 are aspherical mirror surfaces.

[0118] 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.

[0119] 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.

[0120] The following will describe in detail some of the optional embodiments of the imaging lens 210 with reference to specific parameters.

[0121] Example 1

[0122] 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 6As 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0123] 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 concave near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is concave near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has positive refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is convex near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is concave near the optical axis 201, and its image-side surface E42 is 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 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 also has negative 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 concave near the optical axis 201.

[0124] 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 millimeters (mm).

[0125] Table 1

[0126]

[0127] 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.

[0128] As shown in Table 1, when the imaging lens 210 is focused 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 = 0.56 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is T67 = 3.83 mm. When the imaging lens 210 is focused 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 = 3.24 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is T67 = 1.15 mm.

[0129] In Embodiment 1, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 18.6 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 13.95 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.93, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.48. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.22°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 18.08°. The effective focal length FG1 of the first lens group 211 is 12.31 mm, and the effective focal length FG2 of the second lens group 212 is -12.14 mm.

[0130] 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.

[0131] In this embodiment, the object-side surface and image-side surface of any one of the lenses from the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies (but is not limited to) the following formula (11):

[0132]

[0133] 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.

[0134] Table 2-1

[0135] Face number K A4 A6 A8 A10 E11 -7.4123E-02 -3.9190E-06 -2.4192E-06 8.3170E-06 -7.3818E-09 E12 -1.1469E+01 7.3704E-05 -4.2708E-06 4.9664E-06 -8.8741E-07 E21 -5.0341E+00 -3.4805E-03 6.3092E-04 -2.8082E-04 3.2803E-05 E22 0.0000E+00 -4.5117E-03 6.4070E-05 -9.8184E-05 2.6503E-05 E31 0.0000E+00 -8.3933E-03 1.5494E-04 -7.8056E-05 1.1015E-05 E32 0.0000E+00 8.7015E-04 -3.3567E-04 1.8398E-06 -1.0641E-06 E41 0.0000E+00 5.3436E-03 -4.0158E-04 2.7360E-05 -2.2310E-08 E42 0.0000E+00 6.9774E-03 -6.8738E-05 8.7497E-06 -7.0416E-06 E51 0.0000E+00 3.7654E-04 -3.2013E-04 6.9745E-05 5.9061E-06 E52 0.0000E+00 -5.2055E-04 7.1307E-04 -1.1455E-04 5.9690E-05 E61 0.0000E+00 -2.0749E-03 7.7682E-05 -5.2107E-05 -5.9359E-06 E62 0.0000E+00 -2.8243E-04 3.0268E-05 -1.4668E-05 4.3261E-06

[0136] Table 2-2

[0137] Face number A12 A14 A16 A18 A20 E11 6.2797E-08 -1.5752E-10 1.3110E-10 0.0000E+00 0.0000E+00 E12 1.1232E-07 -4.2368E-09 1.7201E-10 -7.3082E-12 7.5765E-14 E21 -1.9447E-08 7.8878E-09 -8.4769E-09 0.0000E+00 0.0000E+00 E22 -2.3890E-07 1.2690E-07 -2.7128E-09 -8.0765E-10 0.0000E+00 E31 -1.3603E-07 3.7942E-08 -6.8934E-09 2.3349E-11 2.2829E-16 E32 9.6245E-08 -2.5459E-08 3.6847E-10 -7.6801E-12 0.0000E+00 E41 -1.7454E-07 1.7575E-08 -1.7835E-10 2.5157E-11 -3.5582E-13 E42 7.2765E-08 7.1551E-09 -4.9826E-11 2.1156E-11 -1.3480E-14 E51 -4.3445E-08 2.3030E-07 -6.7174E-09 6.5266E-11 -1.9119E-12 E52 -2.3551E-06 7.0287E-09 -1.2530E-08 1.0056E-09 -9.1782E-13 E61 6.4498E-07 -1.4267E-08 8.4297E-09 -4.7347E-11 3.1735E-12 E62 -5.7253E-07 1.7835E-08 -4.1726E-10 6.2439E-12 -2.9103E-14

[0138] 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0139] 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.

[0140] 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 546 nm. 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.

[0141] Example 2

[0142] 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0143] 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 concave near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is concave near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has positive refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is convex near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is concave near the optical axis 201, and its image-side surface E42 is 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 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 also has negative 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 concave near the optical axis 201.

[0144] 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).

[0145] Table 3

[0146]

[0147] 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.

[0148] 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 0.6 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 3.93 mm. When the imaging lens 210 is focused 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 3.48 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 1.05 mm.

[0149] In Embodiment 2, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.95 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.10 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.96, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.52. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.2°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 18.05°. The effective focal length FG1 of the first lens group 211 is 13.66 mm, and the effective focal length FG2 of the second lens group 212 is -12.65 mm.

[0150] 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 13cm.

[0151] In Embodiment 2, the object side and image side of any one of the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies the formula (11) 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.

[0152] Table 4-1

[0153] Face number K A4 A6 A8 A10 E11 4.180334E-03 -1.620573E-05 6.311112E-06 -7.298882E-08 8.282978E-08 E12 0.000000E+00 3.942833E-06 1.106759E-05 -3.113753E-06 4.694180E-07 E21 -5.111018E-01 -8.033877E-05 1.364542E-05 -6.236661E-05 4.078904E-06 E22 0.000000E+00 -1.126478E-03 8.337237E-04 -4.048963E-05 1.744579E-06 E31 0.000000E+00 -4.622563E-03 1.244467E-04 -3.903987E-06 3.524672E-06 E32 0.000000E+00 2.237562E-04 -3.120792E-05 6.511629E-07 -9.486429E-08 E41 0.000000E+00 1.380134E-03 -6.050397E-05 3.379590E-06 -1.154449E-07 E42 0.000000E+00 7.195609E-04 -2.287018E-04 1.095499E-05 -9.923900E-06 E51 0.000000E+00 1.142320E-03 -4.948266E-04 6.041092E-05 -7.091760E-06 E52 0.000000E+00 1.242402E-04 -6.072106E-05 1.397749E-05 2.655100E-07 E61 0.000000E+00 -5.915512E-04 -2.019549E-05 3.937611E-06 -1.749661E-06 E62 0.000000E+00 -7.721153E-04 -1.874108E-05 5.924229E-06 -5.121267E-07

[0154] Table 4-2

[0155] Face number A12 A14 A16 A18 A20 E11 -5.839885E-09 2.534336E-10 -3.458085E-12 0.000000E+00 0.000000E+00 E12 -8.450381E-09 2.244112E-10 -1.171839E-10 1.929351E-12 -9.215104E-15 E21 -3.065192E-07 1.539702E-08 -1.965853E-10 0.000000E+00 0.000000E+00 E22 -2.331729E-07 2.438286E-08 -7.938028E-11 0.000000E+00 0.000000E+00 E31 -8.492857E-08 2.819467E-09 -7.444690E-11 2.524583E-14 -1.250574E-15 E32 9.915007E-08 -1.267533E-09 8.247415E-11 -1.164364E-14 0.000000E+00 E41 9.828793E-09 -1.768961E-10 9.440806E-14 0.000000E+00 0.000000E+00 E42 8.210338E-07 -7.644564E-10 5.380109E-10 -9.937305E-12 3.216678E-13 E51 1.381389E-06 -4.743579E-08 9.219825E-10 -9.104069E-12 8.436963E-14 E52 -3.054505E-09 1.134245E-08 -5.498439E-10 1.082406E-11 -7.093464E-14 E61 3.762505E-07 -2.980720E-08 2.509751E-10 -2.398546E-11 1.917300E-13 E62 9.925625E-09 -2.007007E-09 7.857914E-11 -1.837427E-12 5.504659E-16

[0156] 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0157] 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.

[0158] 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.

[0159] Example 3

[0160] 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0161] 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 concave near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is concave near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has positive refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is convex near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is concave near the optical axis 201, and its image-side surface E42 is 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 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 also has negative 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 concave near the optical axis 201.

[0162] 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).

[0163] Table 5

[0164]

[0165]

[0166] 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.

[0167] 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 0.6 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 4.04 mm. When the imaging lens 210 is focused 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 3.47 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 1.17 mm.

[0168] In Embodiment 3, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 19.98 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 15.03 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.93, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.48. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.18°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 17.99°. The effective focal length FG1 of the first lens group 211 is 13.40 mm, and the effective focal length FG2 of the second lens group 212 is -13.14 mm.

[0169] 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 13cm.

[0170] In Embodiment 3, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies the formula (11) 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.

[0171] Table 6-1

[0172] Face number K A4 A6 A8 A10 E11 1.546193E-02 -2.289265E-06 9.071549E-07 -6.716516E-07 4.790187E-08 E12 0.000000E+00 6.345735E-06 4.581888E-07 -1.738515E-07 1.053420E-07 E21 -5.350730E+00 -5.129515E-04 4.329254E-04 -3.193658E-05 1.555328E-06 E22 0.000000E+00 -1.602848E-03 6.899481E-04 -1.345581E-04 3.250820E-06 E31 0.000000E+00 -1.000967E-03 1.261376E-04 -6.234354E-05 4.588867E-06 E32 0.000000E+00 1.571013E-04 -1.876432E-05 5.329837E-06 -7.954775E-07 E41 0.000000E+00 9.035181E-04 -8.592934E-05 6.190535E-06 -2.124218E-07 E42 0.000000E+00 1.484987E-03 -1.951813E-04 9.025884E-05 -8.442676E-06 E51 0.000000E+00 9.554588E-04 -2.140107E-04 1.452276E-04 -1.583048E-05 E52 0.000000E+00 5.570059E-05 -7.256305E-05 1.057309E-05 -4.957041E-06 E61 0.000000E+00 -3.161912E-04 -1.148639E-05 1.345252E-05 -2.998958E-06 E62 0.000000E+00 -1.458512E-03 4.143168E-05 -4.046056E-06 3.062824E-07

[0173] Table 6-2

[0174]

[0175]

[0176] 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0177] 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.

[0178] 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.

[0179] Example 4

[0180] 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 18 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0181] 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 positive 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 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 also has negative 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 also concave near the optical axis 201.

[0182] 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).

[0183] Table 7

[0184]

[0185]

[0186] 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.

[0187] 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 0.6 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 3.88 mm. When the imaging lens 210 is focused 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 3.29 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 1.19 mm.

[0188] In Embodiment 4, the effective focal length Finf of the imaging lens 210 when focusing at infinity is 18.6 mm, and the effective focal length Fmac of the imaging lens 210 when focusing at macro is 13.67 mm. The F-number FNOinf of the imaging lens 210 when focusing at infinity is 1.90, and the F-number FNOmac of the imaging lens 210 when focusing at macro is 1.50. The field of view FOVinf of the imaging lens 210 when focusing at infinity is 17.19°, and the field of view FOVmac of the imaging lens 210 when focusing at macro is 18.16°. The effective focal length FG1 of the first lens group 211 is 12.25 mm, and the effective focal length FG2 of the second lens group 212 is -11.33 mm.

[0189] 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.

[0190] In Embodiment 4, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies formula (11) 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.

[0191] Table 8-1

[0192] Face number K A4 A6 A8 A10 E11 -4.069745E-02 -5.635551E-06 1.356502E-06 -1.201359E-07 1.399645E-07 E12 -7.826114E+01 1.231361E-04 9.021171E-06 -8.550521E-06 8.884248E-07 E21 -6.194610E+00 -3.600960E-04 2.842987E-05 -3.047940E-06 1.198416E-06 E22 3.358693E-01 -2.158052E-03 9.804965E-04 -2.066032E-04 5.770942E-06 E31 4.778547E-04 -3.592383E-03 2.563504E-04 -3.611871E-05 9.345833E-06 E32 4.201166E-02 -4.121199E-06 5.808631E-06 -3.240792E-06 8.758615E-07 E41 -1.137666E+00 1.464414E-03 7.508483E-05 -1.815522E-05 1.995993E-06 E42 -3.126147E-01 2.823155E-04 1.393523E-03 -3.190187E-04 1.414066E-04 E51 3.134634E+00 -6.234952E-04 2.617603E-04 -3.641038E-04 1.800901E-04 E52 1.859626E+01 -7.675591E-04 9.043129E-04 -2.500645E-04 3.546677E-05 E61 -6.431563E+01 -4.314748E-03 1.370207E-04 5.536726E-05 -9.341896E-06 E62 -1.037300E+00 -7.562464E-04 2.883955E-04 -9.055533E-06 1.307822E-07

[0193] Table 8-2

[0194] Face number A12 A14 A16 A18 A20 E11 -9.741635E-09 1.791626E-10 -1.065401E-11 0.000000E+00 0.000000E+00 E12 -1.587491E-07 1.118524E-08 -1.724906E-10 8.394884E-12 -5.997056E-14 E21 -4.746447E-07 1.525992E-08 -9.919256E-11 0.000000E+00 0.000000E+00 E22 -6.652435E-08 3.725754E-08 -9.533179E-10 4.536469E-11 0.000000E+00 E31 -5.655598E-07 4.446073E-09 7.637612E-11 -2.145872E-11 6.620627E-13 E32 -2.412456E-08 5.169792E-09 -6.349962E-10 5.845905E-12 0.000000E+00 E41 -1.068336E-06 3.101076E-07 -1.026820E-08 1.577482E-10 -5.651196E-12 E42 -2.086675E-05 1.914992E-06 -3.129876E-08 2.830378E-10 -1.575297E-11 E51 -3.301592E-05 1.434745E-06 -7.127954E-08 3.059992E-09 -1.315808E-11 E52 -1.709949E-06 4.131402E-07 -5.633422E-09 4.060376E-10 -7.035861E-14 E61 2.614269E-06 -5.007081E-08 7.099392E-09 -1.426690E-10 1.457307E-12 E62 1.801272E-09 -1.201669E-09 1.084850E-10 -3.616084E-13 8.306722E-15

[0195] Incident light passes through as Figure 17 and Figure 18 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0196] 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.

[0197] 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.

[0198] Example 5

[0199] 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0200] 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 positive 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 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 also has negative 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 also concave near the optical axis 201.

[0201] 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).

[0202] Table 9

[0203]

[0204] 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.

[0205] 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 0.55 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 3.65 mm. When the imaging lens 210 is focused 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 2.83 mm, and the spatial distance T67 between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is 1.37 mm.

[0206] In Embodiment 5, the effective focal length Finf of the imaging lens 210 when focused at infinity is 18.55 mm, and the effective focal length Fmac of the imaging lens 210 when focused at macro is 14.15 mm. The F-number FNOinf of the imaging lens 210 when focused at infinity is 1.88, and the F-number FNOmac of the imaging lens 210 when focused at macro is 1.47. The field of view FOVinf of the imaging lens 210 when focused at infinity is 17.22°, and the field of view FOVmac of the imaging lens 210 when focused at macro is 17.86°. The effective focal length FG1 of the first lens group 211 is 12.08 mm, and the effective focal length FG2 of the second lens group 212 is -11.24 mm.

[0207] 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 13cm.

[0208] In Embodiment 5, the object side and image side of any one of the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies the formula (11) 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.

[0209] Table 10-1

[0210]

[0211]

[0212] Table 10-2

[0213] Face number A12 A14 A16 A18 A20 E11 -1.723941E-08 2.077948E-10 -4.519618E-12 0.000000E+00 0.000000E+00 E12 8.439060E-10 -7.572990E-10 9.867091E-12 0.000000E+00 0.000000E+00 E21 -5.580508E-08 9.802825E-09 -5.131258E-11 0.000000E+00 0.000000E+00 E22 -1.580170E-06 8.430931E-08 -2.374236E-09 1.717725E-11 0.000000E+00 E31 -1.800217E-07 8.869497E-09 -1.022882E-10 1.269088E-12 5.911296E-14 E32 7.630404E-08 -1.186296E-10 1.779820E-10 -1.096177E-12 -3.368523E-14 E41 -2.500953E-07 4.131213E-08 -1.384214E-09 9.851302E-11 -1.164920E-12 E42 -7.677278E-07 6.557908E-08 -8.994444E-09 3.644022E-11 -1.888871E-12 E51 -6.918873E-07 4.512844E-08 -5.838780E-09 3.823829E-10 -5.957482E-12 E52 -5.492945E-07 9.687792E-09 -2.507823E-09 1.206279E-10 -5.685632E-13 E61 1.324111E-06 -7.015071E-07 2.923150E-08 -2.419817E-11 1.346857E-11 E62 1.169374E-07 -2.207588E-09 6.330233E-10 -1.296536E-11 2.266728E-14

[0214] 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0215] 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 astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 5 of this application when focusing on macro are shown.

[0216] 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.

[0217] Example 6

[0218] Figure 25 This is a schematic diagram of the imaging lens 210 provided in Embodiment Six of this application when focusing at infinity. Figure 26 This is a schematic diagram of the imaging lens 210 provided in Embodiment Six of this application when focusing on macro. Figure 25 and Figure 26 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 filter L7, and an imaging surface L8. The first lens group 211, along the optical axis 201 from the object side to the image side, includes, in sequence, 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, in sequence, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

[0219] 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 concave near the optical axis 201. The second lens L2 has negative refractive power. Its object-side surface E21 is concave near the optical axis 201, and its image-side surface E22 is concave near the optical axis 201. The third lens L3 has positive refractive power. Its object-side surface E31 is convex near the optical axis 201, and its image-side surface E32 is convex near the optical axis 201. The fourth lens L4 has positive refractive power. Its object-side surface E41 is concave near the optical axis 201, and its image-side surface E42 is 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 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 also has negative 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 concave near the optical axis 201.

[0220] Table 11 shows the basic parameters of the camera module 200 of Embodiment Six, where the units for radius of curvature, thickness and focal length are millimeters (mm).

[0221] Table 11

[0222]

[0223] It should be noted that among the thickness values ​​listed in Table 11, 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; 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.

[0224] As shown in Table 11, when the imaging lens 210 is focused 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 = 0.56 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is T67 = 3.93 mm. When the imaging lens 210 is focused 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 = 3.28 mm, and the spatial distance between the image-side surface E62 of the sixth lens L6 and the object-side surface IR1 of the filter L7 is T67 = 1.21 mm.

[0225] In Embodiment Six, the effective focal length Finf of the imaging lens 210 when focused at infinity is 18.6 mm, and the effective focal length Fmac of the imaging lens 210 when focused at macro is 13.96 mm. The F-number FNOinf of the imaging lens 210 when focused at infinity is 1.92, and the F-number FNOmac of the imaging lens 210 when focused at macro is 1.47. The field of view FOVinf of the imaging lens 210 when focused at infinity is 17.21°, and the field of view FOVmac of the imaging lens 210 when focused at macro is 18.1°. The effective focal length FG1 of the first lens group 211 is 12.34 mm, and the effective focal length FG2 of the second lens group 212 is -12.32 mm.

[0226] 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 13cm.

[0227] In Embodiment Six, the object-side surface and image-side surface of any one of the first lens L1 to the sixth lens L6 are aspherical, and the surface shape of each aspherical lens satisfies formula (11) in Embodiment One. Tables 12-1 and 12-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment Six.

[0228] Table 12-1

[0229] Face number K A4 A6 A8 A10 E11 -4.2499E-04 -1.7511E-06 9.5448E-07 -6.5228E-06 1.3205E-07 E12 0.0000E+00 3.9611E-05 2.1989E-05 -1.2350E-06 3.2548E-07 E21 -5.1904E+00 -1.7514E-03 8.4331E-04 -1.2948E-06 2.1353E-05 E22 0.0000E+00 -5.4979E-03 1.8265E-03 -3.1654E-05 3.5010E-04 E31 0.0000E+00 -7.9855E-03 8.5969E-04 -1.2037E-05 1.0800E-05 E32 0.0000E+00 3.6432E-04 -1.4801E-04 2.6376E-04 -5.6738E-06 E41 0.0000E+00 2.6287E-03 -1.8649E-04 2.0497E-05 -2.6033E-05 E42 0.0000E+00 3.1634E-03 -6.6985E-04 1.5459E-05 -1.5766E-05 E51 0.0000E+00 1.9358E-03 -5.4243E-04 2.7818E-04 1.3906E-05 E52 0.0000E+00 -1.0882E-03 6.0156E-04 -1.3506E-05 2.5900E-05 E61 0.0000E+00 -1.8731E-03 5.9434E-04 -6.4541E-07 -2.6328E-06 E62 0.0000E+00 -3.6837E-03 8.4238E-04 -4.7377E-05 -1.4406E-06

[0230] Table 12-2

[0231] Face number A12 A14 A16 A18 A20 E11 -1.1048E-08 4.4459E-10 -6.3017E-12 0.0000E+00 0.0000E+00 E12 -3.2029E-08 2.9988E-09 -1.2542E-10 2.8901E-12 -2.9072E-14 E21 -1.5175E-06 5.9491E-09 -9.8558E-10 0.0000E+00 0.0000E+00 E22 -2.3867E-06 8.9760E-07 -1.3074E-09 -5.9412E-12 0.0000E+00 E31 -5.7200E-07 2.6334E-09 -5.6774E-10 4.3705E-12 1.9202E-14 E32 5.3435E-07 -2.0988E-09 9.1722E-10 -1.1803E-11 0.0000E+00 E41 1.9143E-07 -8.6392E-09 1.9872E-09 -1.0043E-12 -2.6528E-14 E42 1.1175E-07 -5.9206E-07 2.3142E-09 -5.7067E-10 6.2857E-13 E51 -2.8779E-06 1.6646E-08 -1.4037E-08 4.1333E-10 -5.0027E-12 E52 -2.8893E-06 1.9282E-08 -7.0284E-09 1.9183E-10 -2.1279E-12 E61 6.5544E-07 -6.8240E-07 3.7873E-09 -2.1028E-10 1.3226E-12 E62 2.9737E-07 -2.5382E-07 1.1767E-09 -2.8795E-11 2.2143E-13

[0232] Incident light passes through as Figure 25 and Figure 26 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 E62 of the sixth lens L6. The outgoing light rays enter from the object-side surface IR1 of the filter L7 and exit through the image-side surface IR2. The outgoing light rays, filtered by the filter L7, are incident on the imaging surface L8, which senses the incident light rays and generates a corresponding electronic image.

[0233] Figure 27 The image astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 6 of this application when focused at infinity. Figure 28 The astigmatism curve and distortion curve of the imaging lens 210 provided in Embodiment 6 of this application when focusing on macro are shown.

[0234] 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 6, the wavelength of the reference light used for testing is 546 nm. According to Figure 27 and Figure 28 It can be seen that, at this reference wavelength, the imaging lens 210 given in Embodiment 6 can effectively compensate and correct astigmatism and distortion, thereby enabling the imaging lens 210 to achieve good imaging quality.

[0235] In summary, based on the parameter design of the imaging lens 210 given in the above embodiments one to six, and referring to Table 13, embodiments one to six respectively satisfy the aforementioned relation (1) to relation (10).

[0236] Table 13

[0237] relational expression Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 (FG1-FG2) / Finf 1.31 1.32 1.33 1.27 1.26 1.33 f1 / Finf 0.81 0.77 0.79 0.70 0.73 0.80 f1 / f2 -2.16 -1.99 -2.08 -1.97 -2.04 -2.14 Finf / Fmac 1.33 1.32 1.33 1.36 1.31 1.33 f3 / FG1 0.53 0.54 0.53 0.55 0.54 0.53 f6 / FG2 1.40 1.42 1.39 1.53 1.63 1.36 CT4*(R42 / R41) 1.50 1.81 1.54 1.13 1.06 1.41 R41 / R32 1.18 0.89 1.03 1.30 1.27 1.12 f45 / T56 -21.21 -32.47 -22.28 -15.46 -14.14 -23.81 BFLmin / TTL 0.10 0.09 0.11 0.08 0.10 0.11

[0238] Figure 29 This is a schematic diagram of the structure of an electronic device in the thickness direction according to an embodiment of this application; Figure 30 This is a schematic diagram of an electronic device according to an embodiment of this application.

[0239] In addition to providing the aforementioned imaging lens and camera module, this application also provides an electronic device, such as... Figure 29 and Figure 30 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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, comprises a first lens group and a second lens group in order from the object side to the image side along the optical axis; the first lens group comprises, in order 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 positive refractive power; the object side surface of the first lens is convex at the vicinity of the optical axis; the object side surface of the second lens is concave at the vicinity of the optical axis, and the image side surface of the second lens is concave at the vicinity of the optical axis; and the object side surface of the third lens is convex at the vicinity of the optical axis, and the image side surface of the third lens is convex at the vicinity of the optical axis; the second lens group comprises, in order 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 negative refractive power; the object side surface of the fourth lens is concave at the vicinity of the optical axis, and the image side surface of the fourth lens is convex at the vicinity of the optical axis; the image side surface of the fifth lens is concave at the vicinity of the optical axis; and the object side surface of the sixth lens is concave at the vicinity of the optical axis, and the image side surface of the sixth lens is concave at the vicinity of the optical axis; wherein the position of the first lens group is fixed relative to the imaging plane of the camera module; the second lens group is located between the first lens group and the imaging plane, and is configured to be movable along the optical axis between the first lens group and the imaging plane; and 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 Finf of the imaging lens when focusing at infinity satisfy: 1 < (FG1-FG2) / Finf < 2. the combined focal length f45 of the fourth lens and the fifth lens, and the spatial interval T56 of the fifth lens and the sixth lens along the optical axis satisfy: -100 < f45 / T56 < -5.

2. The imaging lens according to claim 1, wherein 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.

3. The imaging lens according to claim 1, wherein the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: -2.8 < f1 / f2 < -1.

5.

4. The imaging lens according to claim 1, wherein 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: Finf / Fmac < 1.

5.

5. The imaging lens according to claim 1, wherein the effective focal length f3 of the third lens, and the effective focal length FG1 of the first lens group satisfy: 0.2 < f3 / FG1 < 1.

0.

6. The imaging lens according to claim 1, wherein the effective focal length f6 of the sixth lens, and the effective focal length FG2 of the second lens group satisfy: 0.5 < f6 / FG2 < 3.

7. The imaging lens according to claim 1, wherein A center thickness CT4 of the fourth lens on the optical axis, a curvature radius R41 of an object side surface of the fourth lens, and a curvature radius R42 of an image side surface of the fourth lens satisfy: 0.5 < CT4*(R42 / R41) < 3.

8. The imaging lens according to claim 1, wherein a curvature radius R32 of an image side surface of the third lens and the curvature radius R41 of the object side surface of the fourth lens satisfy: 0.5 < R41 / R32 < 5.

9. The imaging lens according to claim 1, wherein a distance BFLmin between the image side surface of the sixth lens and the imaging surface in the direction of the optical axis in the macro focus and a distance TTL between the object side surface of the first lens and the imaging surface in the direction of the optical axis satisfy: BFLmin / TTL > 0.

05. The imaging lens according to any one of claims 1-9. The camera module according to claim 10, wherein:

10. An image capture module, comprising: 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; 11. An electronic device, comprising: The camera module is arranged in the electronic device through the camera hole, and an optical axis direction of the imaging lens in the camera module is parallel to a thickness direction of the electronic device. ​ ​

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