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, with its object side being convex; a fourth lens having a focal power; a fifth lens having a focal power, with its object side being convex and its image side being concave; a sixth lens having a focal power, with its image side being concave; and a seventh lens having a focal power. The total effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group satisfy: f / EPD ≤ 1.40.

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 portable electronic products such as smart phones, higher and higher requirements are put forward for the imaging quality of smart phones in the market. At the same time, users not only pursue smart phones with high-pixel camera lens groups, but also hope that the camera lens groups applied to smart phones can achieve the shooting effects of cameras. In particular, the large aperture characteristic is an important index reflecting the shooting information and energy transfer capabilities of the camera lens group. The camera lens group with the large aperture characteristic can obtain a larger amount of incident light, can ensure good imaging illuminance during the camera recognition process, and can improve the recognition accuracy.

[0003] How to reasonably set technical parameters such as the optical power and surface shape of each lens in the lens group so that the camera lens group applied to portable electronic products has characteristics such as a large aperture while meeting miniaturization is one of the difficult problems that many lens designers are eager to solve at present. Summary of the Invention

[0004] On the one hand, 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 an optical power; a second lens with an optical power; a third lens with a negative optical power, the object side surface of which is convex; a fourth lens with an optical power; a fifth lens with an optical power, the object side surface of which is convex and the image side surface of which is concave; a sixth lens with an optical power, the image side surface of which is concave; and a seventh lens with an optical power. The total effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group can satisfy: f / EPD ≤ 1.40.

[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 total effective focal length f of the camera lens group and the radius of curvature R5 of the object side surface of the third lens can satisfy: 0.1 < f / R5 < 0.8.

[0007] In one embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT21 of the object side surface of the second lens can satisfy: 0.6 < DT21 / DT11 < 1.

[0008] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis can satisfy: 0.1 < CT2 / CT1 < 0.4.

[0009] In one embodiment, the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis and the distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens on the optical axis may satisfy: 0.1 ≤ SAG21 / SAG22 ≤ 0.7.

[0010] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens may satisfy: 1 < ET2 / CT2 < 2.6.

[0011] In one embodiment, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens may satisfy: 0.2 < R10 / R9 < 1.

[0012] In one embodiment, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens may satisfy: R7 / R8 > 0.

[0013] In one embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the camera lens group may satisfy: -0.4 < f / f3 < 0.

[0014] In one embodiment, the distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens on the optical axis and the distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the effective radius of the image side surface of the first lens on the optical axis may satisfy: 0 < SAG12 / SAG11 ≤ 0.05.

[0015] In one embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens may satisfy: 0 < R11 / R12 ≤ 0.25.

[0016] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and half of the diagonal length ImgH of the effective pixel region of the camera lens group may satisfy: TTL / ImgH ≤ 1.60.

[0017] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and the interval distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 0 < (T56 / TTL) × 10 < 0.5.

[0018] In one embodiment, half of the maximum field of view Semi-FOV of the camera lens group may satisfy: 0.6 < tan(Semi-FOV) < 1.

[0019] 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 having a focal power; a second lens having a focal power; a third lens having a negative focal power, with its object side being convex; a fourth lens having a focal power; a fifth lens having a focal power, with its object side being convex and its image side being concave; a sixth lens having a focal power, with its image side being concave; and a seventh lens having a focal power. The radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens may satisfy: R7 / R8 > 0.

[0020] In one embodiment, the total effective focal length f of the camera lens group and the radius of curvature R5 of the object side of the third lens may satisfy: 0.1 < f / R5 < 0.8.

[0021] In one embodiment, the maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT21 of the object side of the second lens may satisfy: 0.6 < DT21 / DT11 < 1.

[0022] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 0.1 < CT2 / CT1 < 0.4.

[0023] In one embodiment, the distance SAG21 on the optical axis from the intersection of the object side of the second lens and the optical axis to the vertex of the effective radius of the object side of the second lens and the distance SAG22 on the optical axis from the intersection of the image side of the second lens and the optical axis to the vertex of the effective radius of the image side of the second lens may satisfy: 0.1 ≤ SAG21 / SAG22 ≤ 0.7.

[0024] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens may satisfy: 1 < ET2 / CT2 < 2.6.

[0025] In one embodiment, the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens may satisfy: 0.2 < R10 / R9 < 1.

[0026] In one embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the camera lens group may satisfy: -0.4 < f / f3 < 0.

[0027] In one embodiment, the distance SAG11 on the optical axis from the intersection of the object side of the first lens and the optical axis to the vertex of the effective radius of the object side of the first lens and the distance SAG12 on the optical axis from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens may satisfy: 0 < SAG12 / SAG11 ≤ 0.05.

[0028] In one embodiment, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens may satisfy: 0 < R11 / R12 ≤ 0.25.

[0029] In one embodiment, the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group and half of the diagonal length ImgH of the effective pixel region of the camera lens group may satisfy: TTL / ImgH ≤ 1.60.

[0030] In one embodiment, the total effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group may satisfy: f / EPD ≤ 1.40.

[0031] In one embodiment, the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group and the interval distance T56 on the optical axis between the fifth lens and the sixth lens may satisfy: 0 < (T56 / TTL)×10 < 0.5.

[0032] In one embodiment, half of the maximum field of view Semi-FOV of the camera lens group may satisfy: 0.6 < tan(Semi-FOV) < 1.

[0033] Through reasonable distribution of optical power and optimization of optical parameters, the present application provides a camera lens group applicable to portable electronic products, having a large aperture, miniaturization, and good imaging quality. Description of the Drawings

[0034] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0035] Figure 1 Shows a schematic structural diagram of the camera lens group according to Embodiment 1 of the present application;

[0036] Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 1;

[0037] Figure 3 Shows a schematic structural diagram of the camera lens group according to Embodiment 2 of the present application;

[0038] Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 2;

[0039] Figure 5 Shows a schematic structural diagram of the camera lens group according to Embodiment 3 of the present application;

[0040] Figures 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 3;

[0041] Figure 7 shows a schematic structural diagram of the camera lens group according to Embodiment 4 of the present application;

[0042] Figures 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 4;

[0043] Figure 9 shows a schematic structural diagram of the camera lens group according to Embodiment 5 of the present application;

[0044] Figures 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 5;

[0045] Figure 11 shows a schematic structural diagram of the camera lens group according to Embodiment 6 of the present application; and

[0046] Figures 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 6. Detailed Embodiments

[0047] 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.

[0048] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. 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.

[0049] In the drawings, for the sake of convenience of illustration, the thickness, size, 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 only examples and are not drawn strictly to scale.

[0050] In this text, 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.

[0051] 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 individual elements in the list. Additionally, 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.

[0052] 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.

[0053] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will detail this application with reference to the drawings and in conjunction with the embodiments.

[0054] The features, principles, and other aspects of this application are described in detail below.

[0055] 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.

[0056] 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, and its object side may be convex; the fourth lens may have a positive or negative optical power; the fifth lens may have a positive or negative optical power, its object side may be convex, and its image side may be concave; the sixth lens may have a positive or negative optical power, and its image side may be concave; and the seventh lens may have a positive or negative optical power.

[0057] In an exemplary embodiment, the camera lens group according to the present application may satisfy: f / EPD ≤ 1.40, where f is the total effective focal length of the camera lens group, and EPD is the entrance pupil diameter of the camera lens group. Satisfying f / EPD ≤ 1.40 can make the F-number of the camera lens group less than 1.40, can endow the camera lens group with the characteristic of a large aperture, is conducive to the camera lens group obtaining a large amount of incident light, so as to ensure good imaging illuminance during the imaging process, is conducive to the camera lens group better meeting the shooting requirements in environments with insufficient light such as cloudy days and dusk, and is conducive to improving the resolution of the camera lens group.

[0058] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.1 < f / R5 < 0.8, where f is the total effective focal length of the camera lens group, and R5 is the radius of curvature of the object side of the third lens. More specifically, f and R5 may further satisfy: 0.3 < f / R5 < 0.6. Satisfying 0.1 < f / R5 < 0.8 is conducive to correcting spherical aberration and reducing the sensitivity of the central region of the field of view. If the value of f / R5 is too large, it will cause a decrease in the convergence degree of the object side of the third lens to the incident light, and thus easily lead to a decrease in imaging quality.

[0059] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.6 < DT21 / DT11 < 1, where DT11 is the maximum effective radius of the object side of the first lens, and DT21 is the maximum effective radius of the object side of the second lens. More specifically, DT21 and DT11 may further satisfy: 0.8 < DT21 / DT11 < 1. Satisfying 0.6 < DT21 / DT11 < 1 is both conducive to reducing the front-end size of the lens group, making the overall lens group thinner and lighter, and conducive to reasonably restricting the range of incident light, eliminating the light with poor edge quality, reducing off-axis aberration, and effectively improving the resolution of the lens group.

[0060] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.1 < CT2 / CT1 < 0.4, where CT1 is the central thickness of the first lens on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. More specifically, CT2 and CT1 may further satisfy: 0.2 < CT2 / CT1 < 0.4. Satisfying 0.1 < CT2 / CT1 < 0.4 is beneficial to ensuring the assembly process of the lens, beneficial to realizing the miniaturization of the camera lens group, and also beneficial to reducing the processing sensitivity of the camera lens group.

[0061] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.1 ≤ SAG21 / SAG22 ≤ 0.7, where SAG21 is the distance from the intersection of the object side of the second lens and the optical axis to the vertex of the effective radius of the object side of the second lens on the optical axis, and SAG22 is the distance from the intersection of the image side of the second lens and the optical axis to the vertex of the effective radius of the image side of the second lens on the optical axis. More specifically, SAG21 and SAG22 may further satisfy: 0.3 ≤ SAG21 / SAG22 ≤ 0.7. Satisfying 0.1 ≤ SAG21 / SAG22 ≤ 0.7 is beneficial to effectively balancing the field curvature, axial spherical aberration, and chromatic spherical aberration of the camera lens group, and thus beneficial to enabling the camera lens group to have good imaging quality and low sensitivity, so as to better ensure the processability of the camera lens group.

[0062] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1 < ET2 / CT2 < 2.6, where CT2 is the central thickness of the second lens on the optical axis, and ET2 is the edge thickness of the second lens. More specifically, ET2 and CT2 may further satisfy: 1.3 < ET2 / CT2 < 2.6. Satisfying 1 < ET2 / CT2 < 2.6 is beneficial to ensuring the processing, forming, and assembly characteristics of the second lens, so that the camera lens group obtains good imaging quality, and at the same time is beneficial to ensuring that the front end size of the camera lens group is small.

[0063] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.2 < R10 / R9 < 1, where R9 is the curvature radius of the object side of the fifth lens, and R10 is the curvature radius of the image side of the fifth lens. More specifically, R10 and R9 may further satisfy: 0.4 < R10 / R9 < 1. Satisfying 0.2 < R10 / R9 < 1 is beneficial to controlling the deflection angle of light after passing through the fifth lens, thereby being beneficial to effectively reducing the sensitivity of the lens group, ensuring that the lens group has good processing performance, and at the same time can control the contribution amount of the field curvature of the lens group within a reasonable range.

[0064] In an exemplary embodiment, the camera lens group according to the present application may satisfy: R7 / R8 > 0, where R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens. More specifically, R7 and R8 may further satisfy: R7 / R8 > 0.1. Satisfying R7 / R8 > 0 is beneficial to controlling the deflection angle of light after passing through the fourth lens, enabling the camera lens group to have a high aberration correction ability, thereby being beneficial to effectively reducing the sensitivity of the fourth lens, and at the same time, the fourth lens can have good processability.

[0065] In an exemplary embodiment, the camera lens group according to the present application may satisfy: -0.4 < f / f3 < 0, where f3 is the effective focal length of the third lens, and f is the total effective focal length of the camera lens group. Satisfying -0.4 < f / f3 < 0 is beneficial to slowing down the deflection angle of light at the third lens, beneficial to reducing the sensitivity of the third lens, and at the same time, beneficial to avoiding too large tilting angles of the object side and the image side of the third lens to ensure good processability of the third lens.

[0066] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0 < SAG12 / SAG11 ≤ 0.05, where SAG11 is the distance from the intersection of the object side of the first lens and the optical axis to the vertex of the effective radius of the object side of the first lens on the optical axis, and SAG12 is the distance from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens on the optical axis. Satisfying 0 < SAG12 / SAG11 ≤ 0.05 can effectively control the contributions of the field curvature and distortion of the camera lens group, improve the imaging quality, and further be beneficial to enabling the camera lens group to obtain good imaging quality and low system sensitivity, and can better ensure the processability of the camera lens group.

[0067] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0 < R11 / R12 ≤ 0.25, where R11 is the curvature radius of the object side of the sixth lens, and R12 is the curvature radius of the image side of the sixth lens. More specifically, R11 and R12 may further satisfy: 0.1 < R11 / R12 ≤ 0.25. Satisfying 0 < R11 / R12 ≤ 0.25 is beneficial to reasonably controlling the curvature of the sixth lens, reducing the optical sensitivity of the sixth lens, thereby ensuring good processing performance of the sixth lens, and being beneficial to enabling the light rays of each field of view of the camera lens group to better match the CRA of the chip when reaching the imaging surface.

[0068] In an exemplary embodiment, the camera lens group according to the present application can satisfy: TTL / ImgH ≤ 1.60, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group, and ImgH is half of the diagonal length of the effective pixel area of the camera lens group. Satisfying TTL / ImgH ≤ 1.60 is beneficial for the camera lens group to have a smaller size, realizing characteristics such as ultra-thinness and miniaturization of the camera lens group, and thus being beneficial for the camera lens group to be better applicable to an increasing number of ultra-thin electronic products on the market.

[0069] In an exemplary embodiment, the camera lens group according to the present application can satisfy: 0 < (T56 / TTL) × 10 < 0.5, where TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group, and T56 is the distance between the fifth lens and the sixth lens on the optical axis. More specifically, T56 and TTL can further satisfy: 0.2 < (T56 / TTL) × 10 < 0.5. Satisfying 0 < (T56 / TTL) × 10 < 0.5 is beneficial for both ensuring the assembly process of each lens and realizing the miniaturization of the camera lens group, and for reducing the processing sensitivity of the camera lens group.

[0070] In an exemplary embodiment, the camera lens group according to the present application can satisfy: 0.6 < tan(Semi-FOV) < 1, where Semi-FOV is half of the maximum field of view angle of the camera lens group. More specifically, Semi-FOV can further satisfy: 0.7 < tan(Semi-FOV) < 0.9. Satisfying 0.6 < tan(Semi-FOV) < 1 is beneficial for imaging as much information as possible on the chip on the object side.

[0071] In an exemplary embodiment, the camera lens group according to the present application further includes a diaphragm disposed between the object side and the first 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 miniaturization, high relative illumination, large aperture, ultra-thinness, and high imaging quality. The camera lens group according to the above embodiment of the present application can employ multiple lenses, such as seven lenses as described above. By reasonably distributing the optical power, surface type, 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 camera lens group more conducive to production and processing.

[0072] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror 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 mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously 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, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much as possible the aberration that appears during imaging, 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 mirror 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 mirror surfaces.

[0073] 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.

[0074] The following further describes specific embodiments of the camera lens group applicable to the above embodiments with reference to the accompanying drawings.

[0075] Example 1

[0076] 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.

[0077] As Figure 1 shown, the camera lens group includes, in order from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0078] The first lens E1 has a positive focal power. Its object side S1 is convex, 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 concave, and its image side S8 is convex. The fifth lens E5 has a negative 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 convex, and its image side S12 is concave. 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. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0079] Table 1 shows the basic parameter table of the camera lens group of Example 1. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0080]

[0081] Table 1

[0082] In this example, the total effective focal length f of the camera lens group is 4.81 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 6.34 mm. Half of the diagonal length of the effective pixel area on the imaging surface S17 of the camera lens group, ImgH, is 4.00 mm. Half of the maximum field of view angle of the camera lens group, Semi-FOV, is 38.98°. The f-number Fno of the camera lens group is 1.39.

[0083] In Example 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0084]

[0085] where x is the sagitta, the distance from the vertex of the aspherical surface along the optical axis at a position with a height of h; 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 correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 。

[0086] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -5.8274E-04 1.7741E-03 -1.0201E-03 -1.5007E-03 2.7961E-03 -1.9978E-03 7.4349E-04 S2 -1.0126E-01 1.9857E-01 -2.5315E-01 2.1812E-01 -1.2734E-01 4.9220E-02 -1.2028E-02 S3 -1.3406E-01 2.0449E-01 -2.5210E-01 2.3485E-01 -1.6737E-01 9.1978E-02 -3.7975E-02 S4 -5.5733E-02 3.6481E-02 6.9861E-03 -8.4068E-02 1.4985E-01 -1.5204E-01 9.6829E-02 S5 -4.7351E-02 8.8353E-05 -4.9612E-02 1.3326E-01 -2.1636E-01 2.0839E-01 -1.2172E-01 S6 -3.2542E-02 -5.1011E-03 -9.9546E-02 3.0628E-01 -4.6759E-01 4.1637E-01 -2.2408E-01 S7 -6.6766E-03 1.3459E-02 -1.8108E-01 5.0502E-01 -7.4710E-01 6.7724E-01 -3.9031E-01 S8 -3.8606E-02 -6.4544E-03 2.6563E-02 -4.4208E-02 -9.9300E-03 1.4463E-01 -2.4432E-01 S9 -8.7159E-02 1.2821E-01 -2.6469E-01 4.5422E-01 -5.9302E-01 5.5675E-01 -3.7088E-01 S10 -2.1825E-01 2.0005E-01 -1.7162E-01 1.2330E-01 -7.4158E-02 3.6592E-02 -1.4280E-02 S11 -1.1556E-01 7.9637E-02 -5.6288E-02 2.6344E-02 -8.4581E-03 1.7793E-03 -2.3887E-04 S12 5.1770E-02 -2.9860E-02 4.1586E-03 2.3193E-03 -1.9404E-03 7.2842E-04 -1.6780E-04 S13 -2.2857E-01 1.2866E-01 -6.5619E-02 2.8165E-02 -8.6732E-03 1.8818E-03 -2.9357E-04 S14 -2.3955E-01 1.3871E-01 -6.6148E-02 2.2796E-02 -5.4842E-03 8.9915E-04 -9.5631E-05

[0087] Table 2-1

[0088] Surface number A18 A20 A22 A24 A26 A28 A30 S1 -1.4455E-04 1.1416E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.6801E-03 -1.0209E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 1.0986E-02 -1.9446E-03 1.5613E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.7855E-02 8.2288E-03 -7.4653E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.2153E-02 -7.7908E-03 5.6651E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 7.1576E-02 -1.2419E-02 8.9381E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.4268E-01 -3.1881E-02 3.9547E-03 -2.0781E-04 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.2206E-01 -1.2625E-01 4.6269E-02 -1.0658E-02 1.4072E-03 -8.1357E-05 0.0000E+00 S9 1.7457E-01 -5.7427E-02 1.2860E-02 -1.8550E-03 1.5261E-04 -4.9355E-06 -6.4941E-08 S10 4.1943E-03 -8.6289E-04 1.1129E-04 -6.7553E-06 -1.6848E-07 4.8262E-08 -1.9520E-09 S11 2.1268E-05 -1.4290E-06 7.7259E-08 -2.3157E-09 0.0000E+00 0.0000E+00 0.0000E+00 S12 2.5428E-05 -2.5638E-06 1.6628E-07 -6.2733E-09 1.0416E-10 0.0000E+00 0.0000E+00 S13 3.3475E-05 -2.7953E-06 1.6783E-07 -6.8993E-09 1.7429E-10 -2.0402E-12 0.0000E+00 S14 5.6286E-06 -2.6599E-08 -2.3137E-08 1.7956E-09 -6.0699E-11 8.1508E-13 0.0000E+00

[0089] Table 2-2

[0090] Figure 2A shows the axial chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the camera lens group of Embodiment 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 Embodiment 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2D shows the lateral chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 2A to 2D it can be known that the camera lens group given in Embodiment 1 can achieve good imaging quality.

[0091] Example 2

[0092] 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 Embodiment 1 will be omitted. Figure 3 shows a schematic structural diagram of the camera lens group according to Embodiment 2 of the present application.

[0093] As Figure 3 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, 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 positive optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative optical power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a negative optical power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is concave. The seventh lens E7 has a negative optical 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. Light from the 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 4.81 mm, the total length TTL of the camera lens group is 6.25 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 4.00 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 39.11°, and the aperture value Fno of the camera lens group is 1.38.

[0096] 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). Tables 4-1 and 4-2 show the high-order term coefficients that can be used for each aspherical mirror surface in Example 2, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0097]

[0098]

[0099] Table 3

[0100] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -1.3781E-03 3.6516E-03 -4.9506E-03 3.2135E-03 -6.2150E-04 -5.0649E-04 3.6207E-04 S2 -1.0556E-01 2.1279E-01 -2.8309E-01 2.5802E-01 -1.6118E-01 6.7324E-02 -1.7928E-02 S3 -1.3926E-01 2.0629E-01 -2.1733E-01 1.2760E-01 -5.4378E-03 -5.4149E-02 4.4102E-02 S4 -5.5853E-02 1.7754E-02 1.0798E-01 -3.2434E-01 4.7560E-01 -4.1790E-01 2.2538E-01 S5 -4.5163E-02 4.9931E-03 -7.4902E-02 1.8749E-01 -2.8766E-01 2.6592E-01 -1.4917E-01 S6 -4.2880E-02 6.5101E-02 -3.1171E-01 7.0456E-01 -9.4886E-01 7.9078E-01 -4.0978E-01 S7 -3.6677E-02 1.2944E-01 -4.9734E-01 1.0700E+00 -1.4132E+00 1.1954E+00 -6.5489E-01 S8 -9.5298E-02 1.2713E-01 -1.8165E-01 1.6805E-01 -1.5876E-01 2.2697E-01 -2.9931E-01 S9 -1.6326E-01 2.9027E-01 -4.9781E-01 7.1833E-01 -8.4228E-01 7.5423E-01 -4.9893E-01 S10 -2.7729E-01 3.0608E-01 -3.0281E-01 2.4598E-01 -1.5543E-01 7.3390E-02 -2.5753E-02 S11 -1.3661E-01 1.0782E-01 -8.7965E-02 4.8642E-02 -1.7919E-02 3.9221E-03 -4.1828E-04 S12 4.1312E-02 -6.6133E-03 -3.1625E-02 3.4103E-02 -1.9612E-02 7.0873E-03 -1.6854E-03 S13 -2.8409E-01 1.7954E-01 -9.7312E-02 4.1368E-02 -1.1816E-02 2.1582E-03 -2.3467E-04 S14 -3.0263E-01 2.0836E-01 -1.1941E-01 5.0593E-02 -1.5454E-02 3.3929E-03 -5.3495E-04

[0101] Table 4-1

[0102] Surface number A18 A20 A22 A24 A26 A28 A30 S1 -9.2372E-05 8.5140E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.7479E-03 -1.8424E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.7144E-02 3.4402E-03 -2.8478E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -7.1225E-02 1.1467E-02 -6.1328E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.8798E-02 -8.1747E-03 4.8545E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.2807E-01 -2.1965E-02 1.5745E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 2.2951E-01 -4.9254E-02 5.8389E-03 -2.8906E-04 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.6824E-01 -1.5698E-01 5.9552E-02 -1.4162E-02 1.9229E-03 -1.1387E-04 0.0000E+00 S9 2.3881E-01 -8.0890E-02 1.8753E-02 -2.8052E-03 2.3922E-04 -8.0086E-06 -1.0908E-07 S10 6.7335E-03 -1.2704E-03 1.5562E-04 -8.7482E-06 -4.0201E-07 8.8583E-08 -3.7417E-09 S11 6.9544E-07 4.5528E-06 -4.2362E-07 1.2566E-08 0.0000E+00 0.0000E+00 0.0000E+00 S12 2.6865E-04 -2.8543E-05 1.9457E-06 -7.7138E-08 1.3534E-09 0.0000E+00 0.0000E+00 S13 1.0336E-05 8.7126E-07 -1.7134E-07 1.2129E-08 -4.2871E-10 6.2787E-12 0.0000E+00 S14 6.0206E-05 -4.7604E-06 2.5619E-07 -8.8419E-09 1.7374E-10 -1.4394E-12 0.0000E+00

[0103] Table 4-2 Figure 4A Shows the axial chromatic aberration curve of the camera lens group of Example 2, which represents the deviation of the converging 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 4DShows the lateral chromatic aberration curve of the camera lens group of Embodiment 2, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to Figures 4A to 4D it can be known that the camera lens group given in Embodiment 2 can achieve good imaging quality.

[0104] Example 3

[0105] The following refers to Figures 5 to 6D to describe the camera lens group according to Embodiment 3 of the present application. Figure 5 Shows a schematic structural diagram of the camera lens group according to Embodiment 3 of the present application.

[0106] As Figure 5 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0107] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a concave surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a positive optical power, its object side surface S11 is a convex surface, and its image side surface S12 is a concave surface. The seventh lens E7 has a negative optical power, its object side surface S13 is a convex surface, and its image side surface S14 is a concave surface. 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.

[0108] In this example, the total effective focal length f of the camera lens group is 4.85 mm, the total length TTL of the camera lens group is 6.31 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 4.00 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 39.00°, and the aperture value Fno of the camera lens group is 1.40.

[0109] 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). Tables 6-1 and 6-2 show the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0110]

[0111]

[0112] Table 5

[0113] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -5.2174E-04 2.1238E-03 -3.3374E-03 2.1834E-03 -1.9141E-04 -6.5083E-04 4.0576E-04 S2 -9.1895E-02 1.8615E-01 -2.5228E-01 2.3557E-01 -1.5134E-01 6.5104E-02 -1.7865E-02 S3 -1.3507E-01 2.0253E-01 -2.3759E-01 1.8394E-01 -7.4366E-02 -5.7576E-03 2.3714E-02 S4 -6.5857E-02 3.7041E-02 6.1910E-02 -2.5893E-01 4.3208E-01 -4.2296E-01 2.5594E-01 S5 -5.8845E-02 1.7859E-02 -7.7250E-02 1.6865E-01 -2.5518E-01 2.4542E-01 -1.4761E-01 S6 -6.3472E-02 6.0516E-03 2.5172E-02 -6.3087E-02 3.9495E-02 1.1498E-02 -2.5152E-02 S7 -3.7194E-02 3.8808E-02 -1.1016E-01 3.3298E-01 -6.7872E-01 8.6781E-01 -7.1194E-01 S8 -6.9092E-02 5.9987E-02 3.2622E-02 -4.8364E-01 1.3861E+00 -2.3157E+00 2.5881E+00 S9 -1.2421E-01 1.8942E-01 -3.0243E-01 3.8197E-01 -3.7642E-01 2.7933E-01 -1.5385E-01 S10 -2.6459E-01 2.6625E-01 -2.3740E-01 9.1055E-02 1.1417E-01 -2.3312E-01 2.0860E-01 S11 -1.3521E-01 1.3935E-01 -1.6618E-01 1.4509E-01 -9.6833E-02 4.8815E-02 -1.8410E-02 S12 4.4820E-02 -3.2470E-03 -3.8526E-02 3.5363E-02 -1.7957E-02 5.8967E-03 -1.2892E-03 S13 -2.6241E-01 1.6972E-01 -9.7335E-02 4.3008E-02 -1.1837E-02 1.6738E-03 1.6219E-05 S14 -2.6989E-01 1.9293E-01 -1.1761E-01 5.4384E-02 -1.8501E-02 4.6266E-03 -8.5461E-04

[0114] Table 6-1

[0115] Surface number A18 A20 A22 A24 A26 A28 A30 S1 -1.0221E-04 9.5051E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.8225E-03 -1.9510E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.2171E-02 2.8266E-03 -2.5966E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -9.3414E-02 1.8654E-02 -1.5312E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 5.3895E-02 -1.0899E-02 9.3654E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.2142E-02 -2.5022E-03 1.8520E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.8335E-01 -1.3547E-01 3.0365E-02 -3.9235E-03 2.2285E-04 0.0000E+00 0.0000E+00 S8 -2.0248E+00 1.1256E+00 -4.4288E-01 1.2062E-01 -2.1627E-02 2.2967E-03 -1.0941E-04 S9 6.2322E-02 -1.8398E-02 3.9189E-03 -5.9316E-04 6.1451E-05 -3.9285E-06 1.1402E-07 S10 -1.1697E-01 4.4306E-02 -1.1520E-02 2.0278E-03 -2.3094E-04 1.5353E-05 -4.5245E-07 S11 5.0904E-03 -1.0018E-03 1.3506E-04 -1.1746E-05 5.8181E-07 -1.1136E-08 -1.0613E-10 S12 1.8763E-04 -1.7751E-05 1.0257E-06 -3.1359E-08 3.3699E-10 3.3178E-13 0.0000E+00 S13 -5.6051E-05 1.1829E-05 -1.3634E-06 9.7841E-08 -4.3490E-09 1.0935E-10 -1.1795E-12 S14 1.1691E-04 -1.1807E-05 8.6983E-07 -4.5531E-08 1.6085E-09 -3.4491E-11 3.4007E-13

[0116] Table 6-2 Figure 6A The axial chromatic aberration curve of the camera lens group of Embodiment 3 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the camera lens group of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curve of the camera lens group of Embodiment 3 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 6D The lateral chromatic aberration curve of the camera lens group of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass 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.

[0117] Example 4

[0118] The following refers to Figures 7 to 8D and describes the camera lens group according to Embodiment 4 of the present application. Figure 7 The structural schematic diagram of the camera lens group according to Embodiment 4 of the present application is shown.

[0119] As Figure 7 shown, the camera lens group sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0120] 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 negative focal power, with its object side S9 being convex and its image side S10 being concave. The sixth lens E6 has a positive focal power, with its object side S11 being convex and its image side S12 being concave. 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 the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0121] In this example, the total effective focal length f of the camera lens group is 4.82 mm, the total length TTL of the camera lens group is 6.27 mm, half of the diagonal length of the effective pixel region on the imaging surface S17 of the camera lens group is ImgH = 4.00 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 38.99°, and the f - number of the camera lens group is Fno = 1.39.

[0122] 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). Tables 8 - 1 and 8 - 2 show the high - order term coefficients available for each aspherical mirror surface in Example 4, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

[0123]

[0124]

[0125] Table 7

[0126] Surface number A4 A6 A8 A10 A12 A14 A16 S1 7.7817E-05 1.7479E-03 -2.5512E-03 1.6322E-03 -2.2128E-04 -3.4392E-04 2.1054E-04 S2 -9.8521E-02 1.8685E-01 -2.3563E-01 2.0528E-01 -1.2279E-01 4.9110E-02 -1.2517E-02 S3 -1.3139E-01 1.8391E-01 -1.9420E-01 1.3001E-01 -3.8653E-02 -1.3288E-02 1.8002E-02 S4 -5.5474E-02 1.8588E-02 9.1297E-02 -2.9144E-01 4.6150E-01 -4.4964E-01 2.7877E-01 S5 -5.3736E-02 3.3538E-02 -1.2868E-01 2.4916E-01 -3.0961E-01 2.3816E-01 -1.0939E-01 S6 -7.5356E-02 1.3053E-01 -3.5469E-01 5.9581E-01 -6.5509E-01 4.7065E-01 -2.1574E-01 S7 -6.4577E-02 1.4069E-01 -3.1891E-01 4.5416E-01 -4.0163E-01 2.0831E-01 -4.4788E-02 S8 -7.0056E-02 7.3323E-02 -8.4053E-02 5.3439E-02 -7.1325E-02 1.8826E-01 -2.9661E-01 S9 -1.3741E-01 2.4248E-01 -4.3627E-01 6.7754E-01 -8.4136E-01 7.7480E-01 -5.1530E-01 S10 -2.6517E-01 2.9705E-01 -3.0966E-01 2.8873E-01 -2.2453E-01 1.3388E-01 -5.8417E-02 S11 -1.4895E-01 8.4305E-02 -5.9644E-02 3.8628E-02 -2.0822E-02 8.0748E-03 -2.1145E-03 S12 5.6353E-02 -8.4844E-02 5.8899E-02 -2.9074E-02 1.0610E-02 -3.1565E-03 8.1185E-04 S13 -5.9912E-02 -5.5424E-02 6.8078E-02 -3.9562E-02 1.5292E-02 -4.1974E-03 8.4033E-04 S14 -6.1308E-02 -2.4763E-02 3.4784E-02 -1.9456E-02 6.7909E-03 -1.6219E-03 2.7521E-04

[0127] Table 8 - 1

[0128] Surface number A18 A20 A22 A24 A26 A28 A30 S1 -4.9442E-05 3.9592E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.8350E-03 -1.1772E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -7.5566E-03 1.5252E-03 -1.2403E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.0714E-01 2.3268E-02 -2.1775E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 2.7124E-02 -2.5415E-03 -8.9401E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 5.9887E-02 -8.9724E-03 5.3644E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -1.2069E-02 1.0200E-02 -2.4475E-03 2.1086E-04 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.7774E-01 -1.6470E-01 6.2873E-02 -1.5029E-02 2.0509E-03 -1.2205E-04 0.0000E+00 S9 2.4464E-01 -8.1692E-02 1.8657E-02 -2.7560E-03 2.3316E-04 -7.7907E-06 -1.0591E-07 S10 1.8063E-02 -3.8005E-03 5.0880E-04 -3.7379E-05 7.7444E-07 6.1837E-08 -2.5458E-09 S11 3.5664E-04 -3.6130E-05 1.9334E-06 -3.9754E-08 0.0000E+00 0.0000E+00 0.0000E+00 S12 -1.7272E-04 2.7380E-05 -2.8911E-06 1.7727E-07 -4.7243E-09 0.0000E+00 0.0000E+00 S13 -1.2361E-04 1.3210E-05 -9.9450E-07 4.9791E-08 -1.4826E-09 1.9812E-11 0.0000E+00 S14 -3.3607E-05 2.9342E-06 -1.7846E-07 7.1660E-09 -1.7035E-10 1.8119E-12 0.0000E+00

[0129] Table 8 - 2 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 8DThe chromatic aberration curve of magnification of the imaging lens group of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8A to 8D it can be known that the imaging lens group given in Embodiment 4 can achieve good imaging quality.

[0130] Example 5

[0131] The following refers to Figures 9 to 10D the imaging lens group according to Embodiment 5 of the present application is described. Figure 9 The structural schematic diagram of the imaging lens group according to Embodiment 5 of the present application is shown.

[0132] As Figure 9 shown, the imaging lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging plane S17.

[0133] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a negative optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a negative optical power, its object side surface S7 is a convex surface, and its image side surface S8 is a concave surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The sixth lens E6 has a positive optical power, its object side surface S11 is a convex surface, and its image side surface S12 is a concave surface. The seventh lens E7 has a negative optical power, its object side surface S13 is a concave surface, and its image side surface S14 is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging plane S17.

[0134] In this example, the total effective focal length f of the imaging lens group is 4.95 mm, the total length TTL of the imaging lens group is 6.34 mm, half of the diagonal length of the effective pixel area on the imaging plane S17 of the imaging lens group is ImgH = 4.00 mm, half of the maximum field of view angle of the imaging lens group is Semi-FOV = 38.05°, and the aperture value Fno of the imaging lens group is 1.39.

[0135] Table 9 shows the basic parameter table of the imaging lens group of Embodiment 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 10-1 and 10-2 show the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0136]

[0137]

[0138] Table 9

[0139] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -1.5077E-04 2.8683E-03 -5.9048E-03 7.0288E-03 -5.1788E-03 2.3837E-03 -6.7660E-04 S2 -9.4178E-02 1.7041E-01 -2.0479E-01 1.7000E-01 -9.6684E-02 3.6663E-02 -8.8409E-03 S3 -1.3231E-01 1.7615E-01 -1.7857E-01 1.1982E-01 -4.2181E-02 -1.9749E-03 9.1324E-03 S4 -6.0159E-02 1.8415E-02 1.0646E-01 -3.2515E-01 5.0172E-01 -4.7599E-01 2.8673E-01 S5 -4.6311E-02 1.1231E-02 -8.1488E-02 1.6946E-01 -2.1086E-01 1.5407E-01 -6.2816E-02 S6 -6.0644E-02 1.3606E-01 -4.5094E-01 8.0011E-01 -8.6030E-01 5.8314E-01 -2.4982E-01 S7 -6.6535E-02 2.1099E-01 -5.8968E-01 9.4986E-01 -9.1564E-01 5.4061E-01 -1.8812E-01 S8 -9.8786E-02 1.5773E-01 -2.3244E-01 2.0572E-01 -1.4391E-01 1.6426E-01 -2.2451E-01 S9 -1.6164E-01 3.0212E-01 -5.4172E-01 7.9935E-01 -9.3776E-01 8.2987E-01 -5.3836E-01 S10 -2.4879E-01 2.9674E-01 -3.3910E-01 3.2839E-01 -2.5170E-01 1.4476E-01 -6.0456E-02 S11 -1.3122E-01 8.7432E-02 -6.2102E-02 3.1053E-02 -1.0585E-02 1.9864E-03 1.3904E-05 S12 3.7084E-02 -4.4786E-02 3.5273E-02 -2.5500E-02 1.3834E-02 -5.4106E-03 1.5114E-03 S13 -1.1778E-01 1.8948E-02 2.0423E-02 -2.0761E-02 1.0266E-02 -3.1831E-03 6.6424E-04 S14 -1.1437E-01 2.8711E-02 5.1533E-03 -9.7049E-03 5.0047E-03 -1.5382E-03 3.1686E-04

[0140] Table 10-1

[0141] Surface number A18 A20 A22 A24 A26 A28 A30 S1 1.0842E-04 -7.8549E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.2246E-03 -7.4257E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -4.0146E-03 7.9095E-04 -6.1458E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.0690E-01 2.2520E-02 -2.0487E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.1711E-02 8.3662E-05 -2.4994E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 6.5307E-02 -9.4204E-03 5.6548E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.1604E-02 5.6271E-04 -1.0296E-03 1.0969E-04 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.1117E-01 -1.2638E-01 4.8166E-02 -1.1385E-02 1.5258E-03 -8.8762E-05 0.0000E+00 S9 2.5180E-01 -8.3403E-02 1.8983E-02 -2.8033E-03 2.3746E-04 -7.9455E-06 -1.0816E-07 S10 1.7833E-02 -3.5776E-03 4.5748E-04 -3.2237E-05 6.5632E-07 4.7746E-08 -1.9297E-09 S11 -1.0711E-04 2.5604E-05 -2.6483E-06 1.0528E-07 0.0000E+00 0.0000E+00 0.0000E+00 S12 -2.9750E-04 4.0126E-05 -3.5129E-06 1.7894E-07 -4.0080E-09 0.0000E+00 0.0000E+00 S13 -9.5982E-05 9.6442E-06 -6.6193E-07 2.9605E-08 -7.7766E-10 9.1013E-12 0.0000E+00 S14 -4.5216E-05 4.4788E-06 -3.0185E-07 1.3189E-08 -3.3666E-10 3.8087E-12 0.0000E+00

[0142] Table 10-2

[0143] Figure 10A The axial chromatic aberration curve of the camera lens group of Example 5 is shown, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 10B The astigmatism curve of the camera lens group of Example 5 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 10C The distortion curve of the camera lens group of Example 5 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 10D The longitudinal chromatic aberration curve of the camera lens group of Example 5 is shown, which represents the deviation of different image heights on the imaging plane after light rays pass 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.

[0144] Example 6

[0145] The following refers 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 the camera lens group according to Embodiment 6 of the present application is shown.

[0146] As Figure 11 shown, the camera lens group sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an imaging surface S17.

[0147] The first lens E1 has a positive focal power, its object side S1 is convex, 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 negative focal power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative 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 convex, and its image side S12 is concave. 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. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0148] In this example, the total effective focal length f of the camera lens group is 5.05 mm, the total length TTL of the camera lens group is 6.39 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 of the camera lens group is ImgH = 4.00 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 37.55°, and the f - number Fno of the camera lens group is 1.39.

[0149] Table 11 shows the basic parameter table of the camera lens group of Example 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 12 - 1 and 12 - 2 show the higher - order term coefficients of the aspherical mirror surfaces that can be used in Example 6, and each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0150]

[0151]

[0152] Table 11

[0153] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -2.7842E-04 2.5825E-03 -5.3124E-03 6.3774E-03 -4.7442E-03 2.2063E-03 -6.3214E-04 S2 -9.2338E-02 1.6383E-01 -1.9079E-01 1.5246E-01 -8.3190E-02 3.0216E-02 -6.9721E-03 S3 -1.3182E-01 1.7333E-01 -1.6922E-01 1.0805E-01 -3.6183E-02 -1.1629E-03 6.5363E-03 S4 -6.0563E-02 2.0834E-02 1.0040E-01 -3.0195E-01 4.5118E-01 -4.1382E-01 2.4129E-01 S5 -4.5701E-02 1.0700E-02 -8.4174E-02 1.9678E-01 -2.7596E-01 2.3652E-01 -1.2545E-01 S6 -4.2933E-02 5.3354E-02 -2.2531E-01 4.4094E-01 -5.0849E-01 3.6954E-01 -1.7215E-01 S7 -4.0493E-02 1.1110E-01 -3.5114E-01 5.9706E-01 -6.0518E-01 3.9581E-01 -1.7243E-01 S8 -9.3762E-02 1.6453E-01 -3.1668E-01 3.9665E-01 -3.7925E-01 3.4645E-01 -3.1156E-01 S9 -1.5870E-01 3.1751E-01 -6.0041E-01 8.7947E-01 -9.8728E-01 8.3037E-01 -5.1468E-01 S10 -2.4153E-01 3.0501E-01 -3.6624E-01 3.5190E-01 -2.5718E-01 1.3885E-01 -5.4227E-02 S11 -1.2254E-01 9.2978E-02 -6.8980E-02 3.2645E-02 -8.8068E-03 4.5331E-04 5.6553E-04 S12 3.1708E-02 -3.2870E-02 3.2043E-02 -3.1273E-02 2.0515E-02 -8.9517E-03 2.6505E-03 S13 -1.4899E-01 5.7958E-02 -1.1035E-02 -3.4417E-03 3.3632E-03 -1.1809E-03 2.4453E-04 S14 -1.5150E-01 6.7072E-02 -2.2051E-02 3.6251E-03 4.0880E-04 -4.1331E-04 1.2159E-04

[0154] Table 12 - 1

[0155] Surface number A18 A20 A22 A24 A26 A28 A30 S1 1.0216E-04 -7.3865E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 9.2359E-04 -5.3549E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.6820E-03 4.8700E-04 -3.4524E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -8.7220E-02 1.7845E-02 -1.5788E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.0048E-02 -6.9326E-03 4.8164E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 5.0044E-02 -8.2574E-03 5.8839E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 4.9810E-02 -9.1714E-03 9.7775E-04 -4.6273E-05 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.3148E-01 -1.2402E-01 4.4815E-02 -1.0307E-02 1.3606E-03 -7.8429E-05 0.0000E+00 S9 2.3183E-01 -7.4507E-02 1.6557E-02 -2.3987E-03 2.0000E-04 -6.6018E-06 -8.8659E-08 S10 1.4967E-02 -2.8155E-03 3.3809E-04 -2.2242E-05 3.7314E-07 3.6648E-08 -1.4529E-09 S11 -2.1400E-04 3.6581E-05 -3.1479E-06 1.0969E-07 0.0000E+00 0.0000E+00 0.0000E+00 S12 -5.3477E-04 7.2302E-05 -6.2533E-06 3.1195E-07 -6.8126E-09 0.0000E+00 0.0000E+00 S13 -3.2854E-05 2.9058E-06 -1.6218E-07 4.8683E-09 -2.1035E-11 -3.0473E-12 6.4504E-14 S14 -2.1485E-05 2.5279E-06 -2.0241E-07 1.0894E-08 -3.7668E-10 7.5427E-12 -6.6266E-14

[0156] Table 12 - 2

[0157] Figure 12A Shows the axial chromatic aberration curve of the camera lens group of Example 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the camera lens group of Example 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12CThe distortion curve of the camera lens group of Embodiment 6 is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 12D The longitudinal chromatic aberration curve of the camera lens group of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D it can be known that the camera lens group given in Embodiment 6 can achieve good imaging quality.

[0158] In summary, Embodiments 1 to 6 respectively satisfy the relationships shown in Table 13.

[0159] Conditional / Example 1 2 3 4 5 6 R7 / R8 7.86 1.11 0.18 0.17 1.33 0.77 f / f3 -0.15 -0.18 -0.27 -0.24 -0.17 -0.11 CT2 / CT1 0.26 0.25 0.26 0.33 0.31 0.28 TTL / ImgH 1.58 1.56 1.58 1.57 1.59 1.60 R10 / R9 0.45 0.85 0.81 0.66 0.91 0.72 f / R5 0.33 0.35 0.54 0.48 0.46 0.37 R11 / R12 0.25 0.22 0.24 0.16 0.14 0.13 SAG12 / SAG11 0.03 0.04 0.03 0.05 0.02 0.02 SAG21 / SAG22 0.33 0.70 0.68 0.69 0.64 0.60 DT21 / DT11 0.88 0.89 0.91 0.91 0.91 0.91 ET2 / CT2 2.58 1.38 1.40 1.37 1.47 1.56 (T56 / TTL)×10 0.30 0.35 0.31 0.36 0.40 0.40 tan(Semi - FOV) 0.81 0.81 0.81 0.81 0.78 0.77

[0160] Table 13

[0161] The present 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.

[0162] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present 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 having similar functions disclosed in the present application.

Claims

1. Camera lens group, characterized in that, It sequentially includes from the object side to the image side along the optical axis: A first lens with a positive optical power, whose object side is convex and image side is concave; A second lens with a negative optical power, whose object side is convex and image side is concave; A third lens with a negative optical power, whose object side is convex and image side is concave; A fourth lens with an optical power, whose object side is convex and image side is concave, or whose object side is concave and image side is convex; A fifth lens with a negative optical power, whose object side is convex and image side is concave; A sixth lens with a positive optical power, whose object side is convex and image side is concave; and A seventh lens with a negative optical power, whose image side is concave; The number of lenses with optical power in the imaging lens group is seven; The curvature radius R7 of the object side of the fourth lens and the curvature radius R8 of the image side of the fourth lens satisfy: 0.17 ≤ R7 / R8 ≤ 7.86; The effective focal length f3 of the third lens and the total effective focal length f of the imaging lens group satisfy: -0.27 ≤ f / f3 ≤ -0.11; The distance TTL on the optical axis from the object side of the first lens to the imaging plane of the imaging lens group and the interval distance T56 on the optical axis between the fifth lens and the sixth lens satisfy: 0.30 ≤ (T56 / TTL)×10 ≤ 0.

40.

2. The camera lens group according to claim 1, characterized in that, The total effective focal length f of the imaging lens group and the curvature radius R5 of the object side of the third lens satisfy: 0.33 ≤ f / R5 ≤ 0.

54.

3. The camera lens group according to claim 1, characterized in that, The maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT21 of the object side of the second lens satisfy: 0.88 ≤ DT21 / DT11 ≤ 0.

91.

4. The camera lens group according to claim 1, characterized in that, The central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 0.25 ≤ CT2 / CT1 ≤ 0.

33.

5. The camera lens group according to claim 1, characterized in that, The distance SAG21 on the optical axis from the intersection of the object side of the second lens and the optical axis to the vertex of the effective radius of the object side of the second lens and the distance SAG22 on the optical axis from the intersection of the image side of the second lens and the optical axis to the vertex of the effective radius of the image side of the second lens satisfy: 0.33 ≤ SAG21 / SAG22 ≤ 0.

7.

6. The camera lens group according to claim 1, characterized in that, The central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy: 1.37 ≤ ET2 / CT2 < 2.

6.

7. The camera lens group according to claim 1, characterized in that, The curvature radius R9 of the object side of the fifth lens and the curvature radius R10 of the image side of the fifth lens satisfy: 0.45 ≤ R10 / R9 ≤ 0.

91.

8. The camera lens group according to claim 1, characterized in that, The distance SAG11 on the optical axis from the intersection of the object side of the first lens and the optical axis to the vertex of the effective radius of the object side of the first lens and the distance SAG12 on the optical axis from the intersection of the image side of the first lens and the optical axis to the vertex of the effective radius of the image side of the first lens satisfy: 0 < SAG12 / SAG11 ≤ 0.

05.

9. The camera lens group according to claim 1, characterized in that, The radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R12 of the image side surface of the sixth lens satisfy: 0.13 ≤ R11 / R12 ≤ 0.

25.

10. The camera lens group according to any one of claims 1-9, characterized in that, The distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens group and half of the diagonal length ImgH of the effective pixel region of the camera lens group satisfy: 1.56 ≤ TTL / ImgH ≤ 1.

60.

11. The camera lens group according to any one of claims 1-9, characterized in that, The total effective focal length f of the camera lens group and the entrance pupil diameter EPD of the camera lens group satisfy: 1.38 ≤ f / EPD ≤ 1.

40.

12. The camera lens group according to any one of claims 1-9, characterized in that, Half of the maximum field of view Semi-FOV of the camera lens group satisfies: 0.77 ≤ tan(Semi-FOV) ≤ 0.81.

Images