Camera lens group

Abstract

The present application discloses a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens having a focal power; a second lens having a focal power; a third lens having a negative focal power; a fourth lens having a positive focal power; a fifth lens having a positive focal power; a sixth lens having a focal power; and a seventh lens having a negative focal power; the total effective focal length f of the camera lens group and half of the maximum field of view Semi-FOV of the camera lens group satisfy: 25.00 mm < f / tan<supgt;2< / supgt>(Semi-FOV) < 40.00 mm.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and specifically, to a camera lens group. Background Art

[0002] With the continuous development of science and technology, optical imaging modules play an increasingly important role in people's work and life. Such as mobile phone and computer camera modules related to entertainment and life; vehicle-mounted and security camera modules related to safety and production, etc. Among them, the telephoto camera module occupies a place among many imaging modules due to its advantage of long-distance imaging.

[0003] Although an ordinary short-focus camera module can clearly image when shooting scenes at a short distance, it cannot clearly image the scene on the detector when shooting at a long distance. If the method of magnifying the shooting screen to make the scene look clear is adopted, the screen will show more noise and smear. Compared with the short-focus camera module, the telephoto camera module can achieve clear long-distance imaging with its natural advantage, and can still keep the screen clear when magnifying the object by one time. Summary of the Invention

[0004] The present application provides such a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a focal power; a second lens with a focal power; a third lens with a negative focal power; a fourth lens with a positive focal power; a fifth lens with a positive focal power; a sixth lens with a focal power; and a seventh lens with a negative focal power; the total effective focal length f of the camera lens group and half of the maximum field of view angle Semi-FOV of the camera lens group satisfy: 25.00 mm < f / tan 2 (Semi-FOV) < 40.00 mm.

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

[0006] In one embodiment, the first lens with a focal power and the second lens with a focal power can form a first lens group; the third lens with a negative focal power, the fourth lens with a positive focal power, and the fifth lens with a positive focal power can form a second lens group; the sixth lens with a focal power and the seventh lens with a negative focal power can form a third lens group.

[0007] In one embodiment, the combined focal length f56 of the fifth lens and the sixth lens and the distance BFL on the optical axis from the image side surface of the seventh lens to the imaging surface of the camera lens group satisfy: 6.00 < f56 / BFL < 11.00.

[0008] In one embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens may satisfy: 1.00 < f3 / f7 < 4.50.

[0009] In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens may satisfy: 1.00 < f5 / f4 < 3.50.

[0010] In one embodiment, the combined focal length f34 of the third lens and the fourth lens and the total effective focal length f of the camera lens group may satisfy: 1.00 < f34 / f < 3.00.

[0011] In one embodiment, the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens may satisfy: 3.00 < (R5 + R6) / (R5 - R6) < 6.00.

[0012] In one embodiment, the combined focal length f12 of the first lens and the second lens and the radius of curvature R11 of the object side surface of the sixth lens may satisfy: 1.00 < f12 / R11 < 7.00.

[0013] In one embodiment, the distance T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 8.00 < T23 / CT2 < 14.00.

[0014] In one embodiment, the maximum effective radius DT71 of the object side surface of the seventh lens and the maximum effective radius DT72 of the image side surface of the seventh lens may satisfy: 13.00 < (DT71 + DT72) / (DT72 - DT71) < 17.00.

[0015] In one embodiment, the distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens on the optical axis and the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis may satisfy: 2.00 < (SAG31 + SAG32) / (SAG32 - SAG31) < 4.00.

[0016] In one embodiment, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens may satisfy: 6.00 < ET5 / ET4 < 10.00.

[0017] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 3.00 < CT5 / CT1 < 13.00.

[0018] On the other hand, the present application provides a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a focal power; a second lens with a focal power; a third lens with a negative focal power; a fourth lens with a positive focal power; a fifth lens with a positive focal power; a sixth lens with a focal power; and a seventh lens with a negative focal power. The distance T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 8.00 < T23 / CT2 < 14.00.

[0019] The present application uses seven lenses. By reasonably distributing the focal powers, surface shapes, central thicknesses of the lenses, and the on-axis spacings between the lenses, etc., the above optical imaging system has at least one beneficial effect such as long focal length, high definition, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 FIG. 1 shows a schematic structural diagram of a camera lens group according to Embodiment 1 of the present application;

[0022] Figures 2A to 2D FIGS. 2-5 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 1;

[0023] Figure 3 FIG. 6 shows a schematic structural diagram of a camera lens group according to Embodiment 2 of the present application;

[0024] Figures 4A to 4D FIGS. 7-10 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 2;

[0025] Figure 5 FIG. 11 shows a schematic structural diagram of a camera lens group according to Embodiment 3 of the present application;

[0026] Figures 6A to 6D FIGS. 12-15 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 3;

[0027] Figure 7 FIG. 16 shows a schematic structural diagram of a camera lens group according to Embodiment 4 of the present application;

[0028] Figures 8A to 8D FIGS. 17-20 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 4;

[0029] Figure 9 Shows a schematic structural diagram of an imaging lens group according to Embodiment 5 of the present application;

[0030] Figures 10A to 10D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the imaging lens group of Embodiment 5;

[0031] Figure 11 Shows a schematic structural diagram of an imaging lens group according to Embodiment 6 of the present application;

[0032] Figures 12A to 12D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the imaging lens group of Embodiment 6;

[0033] Figure 13 Shows a schematic structural diagram of an imaging lens group according to Embodiment 7 of the present application;

[0034] Figures 14A to 14D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the imaging lens group of Embodiment 7;

[0035] Figure 15 Shows a schematic structural diagram of an imaging lens group according to Embodiment 8 of the present application;

[0036] Figures 16A to 16D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the imaging lens group of Embodiment 8;

[0037] Figure 17 Shows a schematic structural diagram of an imaging lens group according to Embodiment 9 of the present application; and

[0038] Figures 18A to 18D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the imaging lens group of Embodiment 9. Detailed Description of the Invention

[0039] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] It should be noted that in this specification, the expressions such as first, second, third, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0041] In the drawings, for ease of explanation, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0042] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0043] It should also be understood that the terms "comprises," "comprising," "has," "including," and / or "including having," when used in this specification, denote the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features, rather than modifying individual elements in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application." And the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0045] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0046] The features, principles, and other aspects of the present application are described in detail below.

[0047] The imaging lens group according to an exemplary embodiment of the present application may include seven lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged in sequence along the optical axis from the object side to the image side. There may be a spacing distance between any two adjacent lenses among the first lens to the seventh lens.

[0048] In an exemplary embodiment, the first lens may have a positive or negative optical power; the second lens may have a positive or negative optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a positive optical power; the sixth lens may have a positive or negative optical power; and the seventh lens may have a negative optical power.

[0049] In an exemplary embodiment, the first lens and the second lens may form a first lens group; the third lens, the fourth lens, and the fifth lens may form a second lens group; the sixth lens and the seventh lens may form a third lens group.

[0050] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 25.00 mm < f / tan 2 (Semi-FOV) < 40.00 mm, where f is the total effective focal length of the camera lens group, and Semi-FOV is half of the maximum field of view angle of the camera lens group. More specifically, f and Semi-FOV may further satisfy: 28.00 mm < f / tan 2 (Semi-FOV) < 40.00 mm. Satisfying 25.00 mm < f / tan 2 (Semi-FOV) < 40.00 mm can ensure better resolution when shooting at a long distance, and at the same time can effectively control the shooting field of view range.

[0051] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 6.00 < f56 / BFL < 11.00, where f56 is the combined focal length of the fifth lens and the sixth lens, and BFL is the distance from the image side of the seventh lens to the imaging surface of the camera lens group on the optical axis. More specifically, f56 and BFL may further satisfy: 6.30 < f56 / BFL < 10.90. Satisfying 6.00 < f56 / BFL < 11.00 can reasonably distribute the optical power of the camera lens group, control the back focal length (BFL) margin of the camera lens group, and ensure good imaging quality.

[0052] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f3 / f7 < 4.50, where f3 is the effective focal length of the third lens and f7 is the effective focal length of the seventh lens. More specifically, f3 and f7 may further satisfy: 1.20 < f3 / f7 < 4.30. Satisfying 1.00 < f3 / f7 < 4.50 is beneficial for the camera lens group to better balance aberrations and is also beneficial for improving the resolution of the camera lens group.

[0053] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f5 / f4 < 3.50, where f4 is the effective focal length of the fourth lens and f5 is the effective focal length of the fifth lens. Satisfying 1.00 < f5 / f4 < 3.50 is beneficial for the camera lens group to better balance aberrations and is also beneficial for improving the resolution of the camera lens group.

[0054] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f34 / f < 3.00, where f34 is the combined focal length of the third lens and the fourth lens, and f is the total effective focal length of the camera lens group. More specifically, f34 and f may further satisfy: 1.30 < f34 / f < 2.60. Satisfying 1.00 < f34 / f < 3.00 is beneficial for correcting the axial chromatic aberration of the camera lens group and is also beneficial for improving the resolution of the camera lens group.

[0055] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 3.00 < (R5 + R6) / (R5 - R6) < 6.00, where R5 is the curvature radius of the object side surface of the third lens and R6 is the curvature radius of the image side surface of the third lens. More specifically, R5 and R6 may further satisfy: 3.40 < (R5 + R6) / (R5 - R6) < 5.50. Satisfying 3.00 < (R5 + R6) / (R5 - R6) < 6.00 can prevent the third lens from being too curved, reduce the processing difficulty, and enable the camera lens group to have a better ability to balance chromatic aberration and distortion.

[0056] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f12 / R11 < 7.00, where f12 is the combined focal length of the first lens and the second lens, and R11 is the curvature radius of the object side surface of the sixth lens. More specifically, f12 and R11 may further satisfy: 1.20 < f12 / R11 < 6.80. Satisfying 1.00 < f12 / R11 < 7.00 can prevent the sixth lens from being too curved, reduce the processing difficulty, and enable the camera lens group to have a better ability to balance chromatic aberration and distortion.

[0057] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 8.00 < T23 / CT2 < 14.00, where T23 is the distance between the second lens and the third lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. More specifically, T23 and CT2 may further satisfy: 8.10 < T23 / CT2 < 13.20. Satisfying 8.00 < T23 / CT2 < 14.00 can ensure the processing and assembly characteristics, and avoid problems such as interference between the front and rear lenses during the assembly process due to too small a spacing. At the same time, it is beneficial to slow down the light deflection, adjust the field curvature of the camera lens group, reduce the sensitivity, and thus obtain better imaging quality.

[0058] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 13.00 < (DT71 + DT72) / (DT72 - DT71) < 17.00, where DT71 is the maximum effective radius of the object side of the seventh lens, and DT72 is the maximum effective radius of the image side of the seventh lens. More specifically, DT71 and DT72 may further satisfy: 13.30 < (DT71 + DT72) / (DT72 - DT71) < 16.50. Satisfying 13.00 < (DT71 + DT72) / (DT72 - DT71) < 17.00 can prevent the aperture of the seventh lens from being too large and ensure the miniaturization of the camera lens group.

[0059] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 2.00 < (SAG31 + SAG32) / (SAG32 - SAG31) < 4.00, where SAG31 is the distance from the intersection of the object side of the third lens and the optical axis to the vertex of the effective radius of the object side of the third lens on the optical axis, and SAG32 is the distance from the intersection of the image side of the third lens and the optical axis to the vertex of the effective radius of the image side of the third lens on the optical axis. More specifically, SAG31 and SAG32 may further satisfy: 2.70 < (SAG31 + SAG32) / (SAG32 - SAG31) < 3.90. Satisfying 2.00 < (SAG31 + SAG32) / (SAG32 - SAG31) < 4.00 can avoid the third lens from being too curved, reduce the processing difficulty, and at the same time make the assembly of the camera lens group more stable.

[0060] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 6.00 < ET5 / ET4 < 10.00, where ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens. More specifically, ET5 and ET4 may further satisfy: 6.10 < ET5 / ET4 < 9.80. Satisfying 6.00 < ET5 / ET4 < 10.00 can prevent the edges of the fourth lens and the fifth lens from being too thin, ensure the processability of the fourth lens and the fifth lens, and at the same time is conducive to slowing down light deflection, adjusting the field curvature of the camera lens group, reducing the sensitivity, and thus obtaining better imaging quality.

[0061] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 3.00 < CT5 / CT1 < 13.00, where CT1 is the central thickness of the first lens on the optical axis and CT5 is the central thickness of the fifth lens on the optical axis. More specifically, CT5 and CT1 may further satisfy: 3.40 < CT5 / CT1 < 12.90. Satisfying 3.00 < CT5 / CT1 < 13.00 can ensure the processing and assembly characteristics, avoid problems such as interference between the front and rear lenses during the assembly process due to too small a spacing, and at the same time is conducive to better correcting aberrations and ensuring good imaging quality.

[0062] In an exemplary embodiment, the camera lens group according to the present application further includes a diaphragm disposed between the fourth lens and the fifth lens. Optionally, the above camera lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application provides a camera lens group having characteristics such as long focal length, high resolution, and high imaging quality. The camera lens group according to the above embodiment of the present application may employ multiple lenses, such as the seven lenses described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the incident light can be effectively converged, the optical total length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing.

[0063] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical lens surface, that is, at least one of the object side surface of the first lens to the image side surface of the seventh lens is an aspherical lens surface. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspherical lens surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are aspherical lens surfaces.

[0064] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the camera lens group can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the camera lens group is not limited to including seven lenses. If necessary, the camera lens group may also include other numbers of lenses.

[0065] The specific embodiments of the camera lens group applicable to the above embodiments will be further described below with reference to the accompanying drawings.

[0066] Example 1

[0067] The following refers to Figures 1 to 2D Describe the camera lens group according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the camera lens group according to Embodiment 1 of the present application is shown.

[0068] As Figure 1 shown, the camera lens group sequentially includes from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a diaphragm STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0069] The first lens E1 has a positive focal power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a negative focal power, with its object side S3 being convex and its image side S4 being concave. The third lens E3 has a negative focal power, with its object side S5 being convex and its image side S6 being concave. The fourth lens E4 has a positive focal power, with its object side S7 being convex and its image side S8 being concave. The fifth lens E5 has a positive focal power, with its object side S9 being convex and its image side S10 being convex. The sixth lens E6 has a positive focal power, with its object side S11 being concave and its image side S12 being convex. The seventh lens E7 has a negative focal power, with its object side S13 being concave and its image side S14 being concave. The filter E8 has an object side S15 and an image side S16. Light from the object sequentially passes through each surface S1 to S16 and finally forms an image on the imaging surface S17.

[0070] Table 1 shows the basic parameter table of the camera lens group in Embodiment 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0071]

[0072] Table 1

[0073] In this example, the total effective focal length f of the camera lens group is 6.50 mm, the total length TTL of the camera lens group (i.e., the distance on the optical axis from the object side S1 of the first lens E1 to the imaging surface S17 of the camera lens group) is 15.33 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group ImgH is 2.67 mm, half of the maximum field of view angle of the camera lens group Semi - FOV is 22.5°, and the aperture value Fno of the camera lens group is 2.02.

[0074] In Embodiment 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface profiles of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0075] (1)

[0076] where, is the sagitta of the aspherical surface at a position with a height of h along the optical axis, which is the distance from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c =1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the iCorrection coefficient of the -th order. Table 2 below gives the high-order term coefficients for each aspherical mirror surface S1 - S14 in Example 1 A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0077]

[0078] Table 2

[0079] Figure 2A shows the axial chromatic aberration curve of the camera lens group of Example 1, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens Figure 2B shows the astigmatism curve of the camera lens group of Example 1, which represents the meridional image plane curvature and the sagittal image plane curvature Figure 2C shows the distortion curve of the camera lens group of Example 1, which represents the distortion magnitude values corresponding to different image heights Figure 2D shows the longitudinal chromatic aberration curve of the camera lens group of Example 1, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 2A to 2D it can be known that the camera lens group given in Example 1 can achieve good imaging quality

[0080] Example 2

[0081] The following refers to Figures 3 to 4D to describe the camera lens group according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Example 1 will be omitted Figure 3 shows a schematic structural diagram of the camera lens group according to Embodiment 2 of the present application

[0082] As Figure 3 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17

[0083] The first lens E1 has a negative focal power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a negative focal power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative focal power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive focal power, its object side S7 is convex, and its image side S8 is convex. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is concave. The sixth lens E6 has a positive focal power, its object side S11 is concave, and its image side S12 is convex. The seventh lens E7 has a negative focal power, its object side S13 is concave, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0084] In this example, the total effective focal length f of the camera lens group is 6.10 mm, the total length TTL of the camera lens group is 15.59 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 24.3°, and the f - number Fno of the camera lens group is 2.20.

[0085] Table 3 shows the basic parameter table of the camera lens group of Example 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 4 shows the higher - order term coefficients of the aspherical mirror surfaces that can be used in Example 2, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0086]

[0087] Table 3

[0088]

[0089] Table 4

[0090] Figure 4A shows the axial chromatic aberration curve of the camera lens group of Example 2, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 4B shows the astigmatism curve of the camera lens group of Example 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C shows the distortion curve of the camera lens group of Example 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4D shows the lateral chromatic aberration curve of the camera lens group of Example 2, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According to Figures 4A to 4D it can be seen that the camera lens group given in Example 2 can achieve good imaging quality.

[0091] Example 3

[0092] The following refers to Figures 5 to 6D a camera lens group according to Embodiment 3 of the present application is described. Figure 5 FIG. shows a schematic structural diagram of a camera lens group according to Embodiment 3 of the present application.

[0093] As Figure 5 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0094] The first lens E1 has a negative focal power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive focal power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative focal power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive focal power, its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has a positive focal power, its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has a negative focal power, its object side surface S11 is concave, and its image side surface S12 is convex. The seventh lens E7 has a negative focal power, its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0095] In this example, the total effective focal length f of the camera lens group is 6.50 mm, the total length TTL of the camera lens group is 15.06 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 22.1°, and the f - number Fno of the camera lens group is 2.42.

[0096] Table 5 shows the basic parameter table of the camera lens group of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 6 shows the higher - order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0097]

[0098] Table 5

[0099]

[0100] Table 6

[0101] Figure 6A Shows the axial chromatic aberration curve of the camera lens group of Embodiment 3, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 6B Shows the astigmatism curve of the camera lens group of Embodiment 3, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 6C Shows the distortion curve of the camera lens group of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights. Figure 6D Shows the lateral chromatic aberration curve of the camera lens group of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 6A to 6D It can be known that the camera lens group given in Embodiment 3 can achieve good imaging quality.

[0102] Example 4

[0103] The following refers to Figures 7 to 8D Describes a camera lens group according to Embodiment 4 of the present application. Figure 7 Shows a schematic structural diagram of the camera lens group according to Embodiment 4 of the present application.

[0104] As Figure 7 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a diaphragm STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0105] The first lens E1 has a negative optical power, its object surface S1 is convex, and its image surface S2 is concave. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power, its object surface S7 is convex, and its image surface S8 is concave. The fifth lens E5 has a positive optical power, its object surface S9 is convex, and its image surface S10 is concave. The sixth lens E6 has a positive optical power, its object surface S11 is concave, and its image surface S12 is convex. The seventh lens E7 has a negative optical power, its object surface S13 is concave, and its image surface S14 is concave. The filter E8 has an object surface S15 and an image surface S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0106] In this example, the total effective focal length f of the camera lens group is 6.50 mm, the total length TTL of the camera lens group is 15.38 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 23.0°, and the f-number Fno of the camera lens group is 2.42.

[0107] Table 7 shows the basic parameter table of the camera lens group of Example 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 8 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Example 4, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0108]

[0109] Table 7

[0110]

[0111] Table 8

[0112] Figure 8A shows the axial chromatic aberration curve of the camera lens group of Example 4, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 8B shows the astigmatism curve of the camera lens group of Example 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C shows the distortion curve of the camera lens group of Example 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8D shows the lateral chromatic aberration curve of the camera lens group of Example 4, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 8A to 8D it can be known that the camera lens group given in Example 4 can achieve good imaging quality.

[0113] Example 5

[0114] The following refers to Figures 9 to 10D describes the camera lens group according to Embodiment 5 of the present application. Figure 9 shows a schematic structural diagram of the camera lens group according to Embodiment 5 of the present application.

[0115] As Figure 9 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0116] The first lens E1 has a negative focal power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive focal power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative focal power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive focal power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is convex. The sixth lens E6 has a positive focal power, its object side S11 is concave, and its image side S12 is convex. The seventh lens E7 has a negative focal power, its object side S13 is concave, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0117] In this example, the total effective focal length f of the camera lens group is 6.00 mm, the total length TTL of the camera lens group is 15.39 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 24.6°, and the f - number Fno of the camera lens group is 2.33.

[0118] Table 9 shows the basic parameter table of the camera lens group of Example 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the higher - order term coefficients of the aspherical mirror surfaces that can be used in Example 5, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0119]

[0120] Table 9

[0121]

[0122] Table 10

[0123] Figure 10A shows the axial chromatic aberration curve of the camera lens group of Example 5, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 10B shows the astigmatism curve of the camera lens group of Example 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C shows the distortion curve of the camera lens group of Example 5, which represents the distortion magnitude values corresponding to different image heights. Figure 10D shows the lateral chromatic aberration curve of the camera lens group of Example 5, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 10A to 10D it can be seen that the camera lens group given in Example 5 can achieve good imaging quality.

[0124] Example 6

[0125] The following is a reference to Figures 11 to 12D a camera lens group according to Embodiment 6 of the present application is described. Figure 11 A schematic structural diagram of a camera lens group according to Embodiment 6 of the present application is shown.

[0126] As Figure 11 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a diaphragm STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0127] The first lens E1 has a negative optical power, its object surface S1 is concave, and its image surface S2 is concave. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power, its object surface S7 is convex, and its image surface S8 is convex. The fifth lens E5 has a positive optical power, its object surface S9 is convex, and its image surface S10 is convex. The sixth lens E6 has a positive optical power, its object surface S11 is concave, and its image surface S12 is convex. The seventh lens E7 has a negative optical power, its object surface S13 is concave, and its image surface S14 is concave. The filter E8 has an object surface S15 and an image surface S16. Light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0128] In this example, the total effective focal length f of the camera lens group is 6.10 mm, the total length TTL of the camera lens group is 15.59 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 24.3°, and the f-number Fno of the camera lens group is 2.29.

[0129] Table 11 shows the basic parameter table of the camera lens group of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 6, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0130]

[0131] Table 11

[0132]

[0133] Table 12

[0134] Figure 12A Shows the axial chromatic aberration curve of the camera lens group of Embodiment 6, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the camera lens group of Embodiment 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C Shows the distortion curve of the camera lens group of Embodiment 6, which represents the distortion magnitude values corresponding to different image heights. Figure 12D Shows the longitudinal chromatic aberration curve of the camera lens group of Embodiment 6, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 12A to 12D It can be seen that the camera lens group given in Embodiment 6 can achieve good imaging quality.

[0135] Example 7

[0136] The following refers to Figures 13 to 14D Describes a camera lens group according to Embodiment 7 of the present application. Figure 13 Shows a schematic structural diagram of the camera lens group according to Embodiment 7 of the present application.

[0137] As Figure 13 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a diaphragm STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0138] The first lens E1 has a negative optical power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has a positive optical power, its object side surface S11 is concave, and its image side surface S12 is convex. The seventh lens E7 has a negative optical power, its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0139] In this example, the total effective focal length f of the camera lens group is 6.00 mm, the total length TTL of the camera lens group is 15.39 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 24.6°, and the f-number Fno of the camera lens group is 2.33.

[0140] Table 13 shows the basic parameter table of the camera lens group of Example 7, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 14 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Example 7, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0141]

[0142] Table 13

[0143]

[0144] Table 14

[0145] Figure 14A shows the axial chromatic aberration curve of the camera lens group of Example 7, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 14B shows the astigmatism curve of the camera lens group of Example 7, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C shows the distortion curve of the camera lens group of Example 7, which represents the distortion magnitude values corresponding to different image heights. Figure 14D shows the lateral chromatic aberration curve of the camera lens group of Example 7, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 14A to 14D it can be seen that the camera lens group given in Example 7 can achieve good imaging quality.

[0146] Example 8

[0147] The following refers to Figures 15 to 16D and describes the camera lens group according to Embodiment 8 of the present application. Figure 15 shows a schematic structural diagram of the camera lens group according to Embodiment 8 of the present application.

[0148] As Figure 15 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0149] The first lens E1 has a negative focal power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive focal power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative focal power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive focal power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is convex. The sixth lens E6 has a positive focal power, its object side S11 is concave, and its image side S12 is convex. The seventh lens E7 has a negative focal power, its object side S13 is convex, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0150] In this example, the total effective focal length f of the camera lens group is 6.10 mm, the total length TTL of the camera lens group is 15.59 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 of the camera lens group is ImgH = 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 24.2°, and the aperture value Fno of the camera lens group is 2.30.

[0151] Table 15 shows the basic parameter table of the camera lens group of Example 8, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 16 shows the higher - order term coefficients of the aspherical mirror surfaces that can be used in Example 8, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0152]

[0153] Table 15

[0154]

[0155] Table 16

[0156] Figure 16A shows the axial chromatic aberration curve of the camera lens group of Example 8, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 16B shows the astigmatism curve of the camera lens group of Example 8, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C shows the distortion curve of the camera lens group of Example 8, which represents the distortion magnitude values corresponding to different image heights. Figure 16D shows the lateral chromatic aberration curve of the camera lens group of Example 8, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 16A to 16D it can be seen that the camera lens group given in Example 8 can achieve good imaging quality.

[0157] Example 9

[0158] The following refers to Figures 17 to 18D a camera lens group according to Embodiment 9 of the present application is described. Figure 17 A schematic structural diagram of a camera lens group according to Embodiment 9 of the present application is shown.

[0159] As Figure 17 shown, the camera lens group sequentially includes, from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a stop STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0160] The first lens E1 has a negative focal power, its object surface S1 is concave, and its image surface S2 is concave. The second lens E2 has a positive focal power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative focal power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive focal power, its object surface S7 is convex, and its image surface S8 is concave. The fifth lens E5 has a positive focal power, its object surface S9 is convex, and its image surface S10 is concave. The sixth lens E6 has a positive focal power, its object surface S11 is concave, and its image surface S12 is convex. The seventh lens E7 has a negative focal power, its object surface S13 is concave, and its image surface S14 is concave. The filter E8 has an object surface S15 and an image surface S16. Light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0161] In this example, the total effective focal length f of the camera lens group is 6.00 mm, the total length TTL of the camera lens group is 15.39 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH of 2.67 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV of 24.5°, and the aperture value Fno of the camera lens group is 2.37.

[0162] Table 17 shows the basic parameter table of the camera lens group of Embodiment 9, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 18 shows the high - order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 9, and each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0163]

[0164] Table 17

[0165]

[0166] Table 18

[0167] Figure 18A shows the axial chromatic aberration curve of the camera lens group of Example 9, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 18B shows the astigmatism curve of the camera lens group of Example 9, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 18C shows the distortion curve of the camera lens group of Example 9, which represents the distortion magnitude values corresponding to different image heights. Figure 18D shows the longitudinal chromatic aberration curve of the camera lens group of Example 9, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 18A to 18D it can be seen that the camera lens group given in Example 9 can achieve good imaging quality.

[0168] In summary, Examples 1 to 9 respectively satisfy the relationships shown in Table 19.

[0169]

[0170] Table 19

[0171] This application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described camera lens group.

[0172] The above description is only the preferred embodiments of this application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. Camera lens group, characterized in that, In order from the object side to the image side along the optical axis, it includes: A first lens with a focal power, whose image side is concave; A second lens with a focal power, whose object side is convex; A third lens with a negative focal power, whose object side is convex and image side is concave; A fourth lens with a positive focal power, whose object side is convex; A fifth lens with a positive focal power, whose object side is convex; A sixth lens with a focal power, whose object side is concave and image side is convex; and A seventh lens with a negative focal power, whose image side is concave; The number of lenses with focal power in the camera lens group is seven; The interval distance T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 8.18 ≤ T23 / CT2 ≤ 13.10; The total effective focal length f of the camera lens group and half of the maximum field of view Semi-FOV of the camera lens group satisfy: 28.62 mm ≤ f / tan 2 (Semi-FOV) ≤ 39.21 mm.

2. The camera lens group according to claim 1, wherein, The combined focal length f56 of the fifth lens and the sixth lens and the distance BFL from the image side of the seventh lens to the imaging plane of the camera lens group on the optical axis satisfy: 6.35 ≤ f56 / BFL ≤ 10.

79.

3. The camera lens group according to claim 1, wherein The effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 1.28 ≤ f3 / f7 ≤ 4.

21.

4. The camera lens group according to claim 1, wherein The effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: 1.10 ≤ f5 / f4 ≤ 3.

41.

5. The camera lens group according to claim 1, characterized in that, The combined focal length f34 of the third lens and the fourth lens and the total effective focal length f of the camera lens group satisfy: 1.34 ≤ f34 / f ≤ 2.

57.

6. The camera lens group according to claim 1, wherein The radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy: 3.45 ≤ (R5 + R6) / (R5 - R6) ≤ 5.

42.

7. The camera lens group according to claim 1, characterized in that, The combined focal length f12 of the first lens and the second lens and the radius of curvature R11 of the object side of the sixth lens satisfy: 1.32 ≤ f12 / R11 ≤ 6.

74.

8. The camera lens group according to claim 1, wherein The maximum effective radius DT71 of the object side of the seventh lens and the maximum effective radius DT72 of the image side of the seventh lens satisfy: 13.34 ≤ (DT71 + DT72) / (DT72 - DT71) ≤ 16.

44.

9. The camera lens group according to claim 1, characterized in that, The distance SAG31 on the optical axis from the intersection of the object side of the third lens and the optical axis to the vertex of the effective radius of the object side of the third lens and the distance SAG32 on the optical axis from the intersection of the image side of the third lens and the optical axis to the vertex of the effective radius of the image side of the third lens satisfy: 2.79 ≤ (SAG31 + SAG32) / (SAG32 - SAG31) ≤ 3.

85.

10. The camera lens group according to claim 1, wherein, The edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 6.19 ≤ ET5 / ET4 ≤ 9.

72.

11. The camera lens group according to claim 1, wherein, The central thickness CT1 of the first lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy: 3.46 ≤ CT5 / CT1 ≤ 12.80.

Images