Camera lens

Abstract

The present application discloses a camera lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a positive optical power; a second lens with a negative optical power; a third lens; a fourth lens; a fifth lens; a sixth lens with a positive optical power; and a seventh lens with a negative optical power; wherein, the total effective focal length f of the camera lens, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis satisfy: ImgH<supgt;2< / supgt> / (TTL×f)≥0.8; the total effective focal length f of the camera lens, 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 satisfy: 1.9≤f / R9+f / R10<3.0.

Description

Technical Field

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

[0002] Smartphones have comprehensive functions, and photography is a function that users attach great importance to. In order to better meet the user experience, the photography performance of smartphones needs to be continuously improved. This requires not only continuous upgrades of the photosensitive chip and image processing software, but also poses challenges to the performance of the camera lens on the mobile phone.

[0003] Currently, the camera lenses on mobile phones, especially the main camera lenses of multi-camera modules, are increasingly showing a development trend towards large image planes and ultra-thinness. Such a development trend is a very difficult challenge for the design of camera lenses. Compared with existing camera lenses, the changes in these main parameter values can greatly improve the imaging ability and competitive advantage of the camera lens.

[0004] Traditional camera lenses have a small number of lenses, and such a lens structure is no longer sufficient to effectively meet the requirements of mobile phone manufacturers for camera lenses. Summary of the Invention

[0005] This application provides a camera lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with negative optical power; a third lens; a fourth lens; a fifth lens; a sixth lens with positive optical power; and a seventh lens with negative optical power; wherein, the total effective focal length f of the camera lens, half of the diagonal length ImgH of the effective pixel area on the imaging surface of the camera lens, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis satisfy: ImgH 2 / (TTL×f)≥0.8; the total effective focal length f of the camera lens, 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 satisfy: 1.9≤f / R9 + f / R10<3.0.

[0006] In one embodiment, at least one of the object side surface of the first lens to the image side surface of the seventh lens has an aspherical mirror surface.

[0007] In one embodiment, the effective focal length f6 of the sixth lens, 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 satisfy: -0.5<f6 / (R11 + R12)≤0.1.

[0008] In one embodiment, the effective focal length f7 of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy: -1.5≤f7 / (R13 + R14)<-1.0.

[0009] In one embodiment, the total effective focal length f of the camera lens, the radius of curvature R1 of the object side surface of the first lens, and the radius of curvature R4 of the image side surface of the second lens may satisfy: 0.5 < f / R1 - f / R4 < 1.5.

[0010] In one embodiment, the combined focal length f12 of the first lens and the second lens, the radius of curvature R2 of the image side surface of the first lens, and the radius of curvature R3 of the object side surface of the second lens may satisfy: 1.8 ≤ f12 / |R2 - R3| < 4.0.

[0011] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: -2.0 < f / (f1 + f2) ≤ -0.8.

[0012] In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens may satisfy: 3 ≤ f5 / f7 < 15.

[0013] In one embodiment, the total effective focal length f of the camera lens and the effective focal length f1 of the first lens may satisfy: 1 ≤ f / f1 ≤ 1.3.

[0014] In one embodiment, the total effective focal length f of the camera lens and the effective focal length f6 of the sixth lens may satisfy: 0.8 ≤ f / f6 ≤ 1.0.

[0015] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens may satisfy: 2 ≤ f / f6 - f / f7 < 2.5.

[0016] In one embodiment, the distance T34 between the third lens and the fourth lens on the optical axis and the distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.8 ≤ (T34 + T45) / T34 < 3.0.

[0017] In one embodiment, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R13 of the object side surface of the seventh lens, and the radius of curvature R14 of the image side surface of the seventh lens may satisfy: 0.9 ≤ (R11 - R13) / R14 < 1.2.

[0018] In one embodiment, the radius of curvature R13 of the object side surface of the seventh lens and the distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy: -4.5 < R13 / T67 < -3.0.

[0019] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis may satisfy: 0.9 ≤ (CT6 - CT5) / (CT6 - CT7) < 2.0.

[0020] In one embodiment, the axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the maximum effective radius of the object side surface of the seventh lens, the spacing distance T67 between the sixth lens and the seventh lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis may satisfy: -1.0 ≤ (SAG71 + T67) / CT6 ≤ -0.5.

[0021] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis and half of the diagonal length ImgH of the effective pixel region on the imaging surface may satisfy: TTL / ImgH < 1.3.

[0022] On the other hand, the present application provides a camera lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a positive optical power; a second lens with a negative optical power; a third lens; a fourth lens; a fifth lens; a sixth lens with a positive optical power; and a seventh lens with a negative optical power; wherein, the total effective focal length f of the camera lens, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens, and the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis may satisfy: ImgH 2 / (TTL × f) ≥ 0.8; the effective focal length f7 of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens may satisfy: -1.5 ≤ f7 / (R13 + R14) < -1.0.

[0023] In one embodiment, the effective focal length f6 of the sixth lens, 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: -0.5 < f6 / (R11 + R12) ≤ 0.1.

[0024] In one embodiment, the total effective focal length f of the camera lens, 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: 1.9 ≤ f / R9 + f / R10 < 3.0.

[0025] In one embodiment, the total effective focal length f of the camera lens, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R4 of the image side surface of the second lens may satisfy: 0.5 < f / R1 - f / R4 < 1.5.

[0026] In one embodiment, the combined focal length f12 of the first lens and the second lens, the radius of curvature R2 of the image side of the first lens, and the radius of curvature R3 of the object side of the second lens may satisfy: 1.8 ≤ f12 / |R2 - R3| < 4.0.

[0027] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens may satisfy: -2.0 < f / (f1 + f2) ≤ -0.8.

[0028] In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens may satisfy: 3 ≤ f5 / f7 < 15.

[0029] In one embodiment, the total effective focal length f of the camera lens and the effective focal length f1 of the first lens may satisfy: 1 ≤ f / f1 ≤ 1.3.

[0030] In one embodiment, the total effective focal length f of the camera lens and the effective focal length f6 of the sixth lens may satisfy: 0.8 ≤ f / f6 ≤ 1.0.

[0031] In one embodiment, the total effective focal length f of the camera lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens may satisfy: 2 ≤ f / f6 - f / f7 < 2.5.

[0032] In one embodiment, the distance T34 between the third lens and the fourth lens on the optical axis and the distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.8 ≤ (T34 + T45) / T34 < 3.0.

[0033] In one embodiment, the radius of curvature R11 of the object side of the sixth lens, the radius of curvature R13 of the object side of the seventh lens, and the radius of curvature R14 of the image side of the seventh lens may satisfy: 0.9 ≤ (R11 - R13) / R14 < 1.2.

[0034] In one embodiment, the radius of curvature R13 of the object side of the seventh lens and the distance T67 between the sixth lens and the seventh lens on the optical axis may satisfy: -4.5 < R13 / T67 < -3.0.

[0035] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis may satisfy: 0.9 ≤ (CT6 - CT5) / (CT6 - CT7) < 2.0.

[0036] In one embodiment, the axial distance SAG71 between the intersection of the object side surface of the seventh lens and the optical axis and the vertex of the maximum effective radius of the object side surface of the seventh lens, the axial interval distance T67 between the sixth lens and the seventh lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis may satisfy: -1.0 ≤ (SAG71 + T67) / CT6 ≤ -0.5.

[0037] 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 and half of the diagonal length ImgH of the effective pixel region on the imaging surface may satisfy: TTL / ImgH < 1.3.

[0038] This application uses seven lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the above camera lens has at least one beneficial effect such as ultra-thin, large image plane, low distortion, and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In combination with the accompanying drawings, through the following detailed description of non-limiting embodiments, other features, objectives, and advantages of this application will become more obvious. In the drawings:

[0040] Figure 1 The structural schematic diagram of the camera lens according to Embodiment 1 of this application is shown; Figures 2A to 2D The axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens of Embodiment 1 are respectively shown;

[0041] Figure 3 The structural schematic diagram of the camera lens according to Embodiment 2 of this application is shown; Figures 4A to 4D The axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens of Embodiment 2 are respectively shown;

[0042] Figure 5 The structural schematic diagram of the camera lens according to Embodiment 3 of this application is shown; Figures 6A to 6D The axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens of Embodiment 3 are respectively shown;

[0043] Figure 7 The structural schematic diagram of the camera lens according to Embodiment 4 of this application is shown; Figures 8A to 8D The axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens of Embodiment 4 are respectively shown;

[0044] Figure 9 The structural schematic diagram of the camera lens according to Embodiment 5 of this application is shown; Figures 10A to 10DThe axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens according to Embodiment 5 are respectively shown;

[0045] Figure 11 The schematic structural diagram of the imaging lens according to Embodiment 6 of the present application is shown; Figures 12A to 12D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens according to Embodiment 6 are respectively shown;

[0046] Figure 13 The schematic structural diagram of the imaging lens according to Embodiment 7 of the present application is shown; Figures 14A to 14D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens according to Embodiment 7 are respectively shown. Detailed implementation manners

[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 the 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 clarity, 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 for illustration and are not drawn to an exact scale.

[0050] In this article, 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 to be 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 "comprise", "comprising", "have", "including" and / or "containing", 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. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0052] Unless otherwise defined, all terms (including technical and scientific terms) used herein 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 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 combination with the embodiments.

[0054] The features, principles and other aspects of the present application will be described in detail below.

[0055] The imaging lens according to an exemplary embodiment of the present application may include, for example, 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 order from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first lens to the seventh lens.

[0056] In the exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens has a positive or negative optical power; the fourth lens has a positive or negative optical power; the fifth lens has a positive or negative optical power; the sixth lens may have a positive optical power; the seventh lens may have a negative optical power. By reasonably controlling the positive and negative distribution of the optical power and the curvature of the lens surface of each component of the lens, the low-order aberration of the lens is effectively balanced and controlled.

[0057] In the exemplary embodiment, the imaging lens of the present application may satisfy the conditional ImgH 2 / (TTL×f) ≥ 0.8, where f is the total effective focal length of the camera lens, ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the camera lens, and TTL is the distance from the object side surface of the first lens to the imaging surface of the camera lens on the optical axis. The camera lens satisfies the conditional expression ImgH 2 / (TTL×f) ≥ 0.8, which can ensure its thin and light characteristics. More specifically, f, ImgH, and TTL can satisfy: 0.80 ≤ ImgH 2 / (TTL×f) ≤ 0.94.

[0058] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional expression 1.9 ≤ f / R9 + f / R10 < 3.0, where f is the total effective focal length of the camera lens, R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens. The camera lens satisfies the conditional expression 1.9 ≤ f / R9 + f / R10 < 3.0, which can reduce its optical distortion. Exemplarily, the camera lens also satisfies the conditional expression ImgH 2 / (TTL×f) ≥ 0.8, and the camera lens has good imaging quality. More specifically, f, R9, and R10 can satisfy: 1.92 ≤ f / R9 + f / R10 < 2.80.

[0059] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional expression -0.5 < f6 / (R11 + R12) ≤ 0.1, where f6 is the effective focal length of the sixth lens, R11 is the curvature radius of the object side surface of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens. The camera lens satisfies the conditional expression -0.5 < f6 / (R11 + R12) ≤ 0.1, which can reduce its optical distortion, and thus ensure its good imaging quality. More specifically, f6, R11, and R12 can satisfy: -0.27 < f6 / (R11 + R12) ≤ 0.10.

[0060] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional expression -1.5 ≤ f7 / (R13 + R14) < -1.0, where f7 is the effective focal length of the seventh lens, R13 is the curvature radius of the object side surface of the seventh lens, and R14 is the curvature radius of the image side surface of the seventh lens. The camera lens satisfies the conditional expression -1.5 ≤ f7 / (R13 + R14) < -1.0, which can reduce its optical distortion, and thus ensure its good imaging quality. More specifically, f7, R13, and R14 can satisfy: -1.50 ≤ f7 / (R13 + R14) < -1.05.

[0061] In an exemplary embodiment, the camera lens of the present application may satisfy the conditional expression 0.5 < f / R1 - f / R4 < 1.5, where f is the total effective focal length of the camera lens, R1 is the radius of curvature of the object side surface of the first lens, and R4 is the radius of curvature of the image side surface of the second lens. The camera lens satisfying the conditional expression 0.5 < f / R1 - f / R4 < 1.5 can reduce its optical distortion, and thus ensure good imaging quality. More specifically, f, R1, and R4 may satisfy: 0.55 < f / R1 - f / R4 < 1.33.

[0062] In an exemplary embodiment, the camera lens of the present application may satisfy the conditional expression 1.8 ≤ f12 / |R2 - R3| < 4.0, where f12 is the combined focal length of the first lens and the second lens, R2 is the radius of curvature of the image side surface of the first lens, and R3 is the radius of curvature of the object side surface of the second lens. The camera lens satisfying the conditional expression 1.8 ≤ f12 / |R2 - R3| < 4.0 is beneficial to controlling the incident angle of off-axis field light on the imaging surface, and thus can increase the matching between the camera lens and the photosensitive element and the matching with the band-pass filter. More specifically, f12, R2, and R3 may satisfy: 1.80 ≤ f12 / |R2 - R3| < 3.85.

[0063] In an exemplary embodiment, the camera lens of the present application may satisfy the conditional expression -2.0 < f / (f1 + f2) ≤ -0.8, where f is the total effective focal length of the camera lens, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. The camera lens satisfying the conditional expression -2.0 < f / (f1 + f2) ≤ -0.8 can reasonably distribute the optical power of the camera lens and effectively improve the aberration of the camera lens. More specifically, f, f1, and f2 may satisfy: -1.75 < f / (f1 + f2) ≤ -0.80.

[0064] In an exemplary embodiment, the camera lens of the present application may satisfy the conditional expression 3 ≤ f5 / f7 < 15, where f5 is the effective focal length of the fifth lens and f7 is the effective focal length of the seventh lens. The camera lens satisfying the conditional expression 3 ≤ f5 / f7 < 15 can effectively reduce the optical sensitivity of the fifth lens and the seventh lens, and thus is more conducive to realizing the mass production of the camera lens. More specifically, f5 and f7 may satisfy: 3.00 ≤ f5 / f7 < 14.40.

[0065] In an exemplary embodiment, the camera lens of the present application may satisfy the conditional expression 1 ≤ f / f1 ≤ 1.3, where f is the total effective focal length of the camera lens and f1 is the effective focal length of the first lens. The camera lens satisfying 1 ≤ f / f1 ≤ 1.3 helps to improve its chromatic aberration, can also adjust the focusing position of light, and enhance the light converging ability of the camera lens.

[0066] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0.8 ≤ f / f6 ≤ 1.0, where f is the total effective focal length of the camera lens, and f6 is the effective focal length of the sixth lens. The camera lens satisfying 0.8 ≤ f / f6 ≤ 1.0 helps to increase the focal length of the camera lens and can adjust the light position, thereby shortening the total length of the camera lens.

[0067] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 2 ≤ f / f6 - f / f7 < 2.5, where f is the total effective focal length of the camera lens, f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens. The camera lens satisfying 2 ≤ f / f6 - f / f7 < 2.5 is beneficial to better balance the aberration of the camera lens and is also beneficial to improving the resolution of the camera lens. More specifically, f, f6, and f7 can satisfy: 2.02 ≤ f / f6 - f / f7 < 2.35.

[0068] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 1.8 ≤ (T34 + T45) / T34 < 3.0, where T34 is the distance between the third lens and the fourth lens on the optical axis, and T45 is the distance between the fourth lens and the fifth lens on the optical axis. The camera lens satisfying 1.8 ≤ (T34 + T45) / T34 < 3.0 can effectively control the rear end size of the camera lens, thereby avoiding the camera lens from being too large in volume. More specifically, T34 and T45 can satisfy: 1.80 ≤ (T34 + T45) / T34 < 2.90.

[0069] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0.9 ≤ (R11 - R13) / R14 < 1.2, where R11 is the radius of curvature of the object side surface of the sixth lens, R13 is the radius of curvature of the object side surface of the seventh lens, and R14 is the radius of curvature of the image side surface of the seventh lens. The camera lens satisfying 0.9 ≤ (R11 - R13) / R14 < 1.2 can prevent the sixth lens and the seventh lens from being too curved, reduce the processing difficulty of these two lenses, and at the same time enable the camera lens to have a better ability to balance chromatic aberration and distortion. More specifically, R11, R13, and R14 can satisfy: 0.94 ≤ (R11 - R13) / R14 < 1.10.

[0070] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula -4.5 < R13 / T67 < -3.0, where R13 is the radius of curvature of the object side of the seventh lens, and T67 is the distance between the sixth lens and the seventh lens on the optical axis. When the camera lens satisfies -4.5 < R13 / T67 < -3.0, the principal ray angle of the camera lens can be adjusted accordingly, thereby effectively improving the relative luminance of the camera lens and enhancing the clarity of the imaging surface. More specifically, R13 and T67 can satisfy: -4.10 < R13 / T67 < -3.15.

[0071] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0.9 ≤ (CT6 - CT5) / (CT6 - CT7) < 2.0, where CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CT7 is the central thickness of the seventh lens on the optical axis. When the camera lens satisfies 0.9 ≤ (CT6 - CT5) / (CT6 - CT7) < 2.0, the size of the camera lens can be effectively reduced to avoid the camera lens from being too large in volume. At the same time, while achieving a high space utilization rate, the assembly difficulty of the lens can be reduced. More specifically, CT5, CT6, and CT7 can satisfy: 0.90 ≤ (CT6 - CT5) / (CT6 - CT7) < 1.90.

[0072] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula -1.0 ≤ (SAG71 + T67) / CT6 ≤ -0.5, where SAG71 is the axial distance between the intersection of the object side of the seventh lens and the optical axis and the vertex of the maximum effective radius of the object side of the seventh lens, T67 is the distance between the sixth lens and the seventh lens on the optical axis, and CT6 is the central thickness of the sixth lens on the optical axis. When the camera lens satisfies -1.0 ≤ (SAG71 + T67) / CT6 ≤ -0.5, the deflection angle of the principal ray can be reasonably controlled, the matching degree with the chip can be improved, and it is beneficial to adjust the structure of the camera lens. More specifically, SAG71, T67, and CT6 can satisfy: -0.95 ≤ (SAG71 + T67) / CT6 ≤ -0.50.

[0073] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula TTL / ImgH < 1.3, where TTL is the distance from the object side of the first lens to the imaging surface of the camera lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface. When the ratio of the total optical length of the camera lens to its image height is within this range, the field of view angle can be controlled within a certain range, and the refraction of the incident light at the first lens can be made more gentle. Furthermore, the aberration of the camera lens can be prevented from increasing excessively, and it helps to improve the image quality of the camera lens. More specifically, TTL and ImgH can satisfy: 1.10 < TTL / ImgH < 1.25.

[0074] In an exemplary embodiment, the above-mentioned camera lens may further include at least one aperture. The aperture can be set at an appropriate position as needed. For example, it can be set between the object side and the first lens. Optionally, the above-mentioned camera lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] The camera lens according to the above embodiment of the present application can adopt multiple lenses, such as the seven lenses described above. This camera lens has a high space utilization rate, and the lens structure can meet the requirements of higher principal value parameters. By reasonably distributing the optical power, surface type, central thickness of each lens, and the axial distance between each lens, etc., the volume of the camera lens can be effectively reduced, the sensitivity of the camera lens can be lowered, and the processability of the camera lens can be improved, making the camera lens more conducive to production and processing and applicable to portable electronic products. At the same time, the camera lens of the present application also has excellent optical properties such as ultra-thinness, large image surface, small distortion, and good imaging quality.

[0076] In the 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 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 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.

[0077] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the camera lens 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 is not limited to including seven lenses. If necessary, the camera lens may further include other numbers of lenses.

[0078] The following further describes specific embodiments of the camera lens applicable to the above embodiments with reference to the accompanying drawings.

[0079] Example 1

[0080] The following refers toFigures 1 to 2D Describe the camera lens according to Embodiment 1 of the present application. Figure 1 The schematic structural diagram of the camera lens according to Embodiment 1 of the present application is shown.

[0081] As Figure 1 shown, the camera lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0082] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a negative optical power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a positive 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 concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, 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. The camera lens has an imaging surface S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0083] Table 1 shows the basic parameter table of the camera lens of Embodiment 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0084]

[0085] Table 1

[0086] In Embodiment 1, the value of the total effective focal length f of the camera lens is 6.07 mm, the value of the on-axis distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 7.10 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S17, ImgH, is 6.30 mm, and the value of the maximum field of view FOV is 89.3°.

[0087] In Embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0088]

[0089] Among them, when the aspherical surface is at a position with a height of h along the optical axis direction, x is the sagitta, which is the distance from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, 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. Table 2 below gives the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 and A 26 .

[0090] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.0035E-04 -2.6216E-03 -1.2591E-03 -4.0010E-04 -2.2737E-04 -9.0755E-05 -4.9239E-05 S2 -1.0185E-02 1.1258E-03 -3.8504E-04 -4.2145E-06 -1.3051E-04 2.0484E-05 4.2754E-06 S3 2.8138E-02 2.2966E-03 -1.7191E-03 2.0148E-04 7.7110E-05 3.1025E-04 6.4888E-05 S4 3.0082E-02 7.5017E-03 -1.0095E-04 -1.7924E-04 -2.4639E-04 8.7761E-06 4.3693E-05 S5 -5.4967E-02 1.6603E-02 4.1509E-03 6.5773E-04 -1.5682E-04 -9.9840E-05 -4.1914E-05 S6 -2.3330E-02 1.9746E-02 6.4766E-03 1.4939E-03 1.6720E-04 -4.4167E-05 -3.3152E-05 S7 -2.1893E-01 -1.9194E-02 -1.4479E-03 7.1643E-04 2.0584E-04 2.0685E-04 3.5592E-05 S8 -2.9526E-01 -2.4941E-02 -3.4388E-03 1.9311E-05 -1.5391E-04 1.1020E-04 8.2234E-05 S9 -8.5143E-01 -1.6087E-02 -2.1211E-02 8.2330E-03 1.1552E-05 1.8504E-03 8.8955E-04 S10 -1.3170E+00 1.6255E-01 -3.6613E-02 1.9641E-02 -4.9181E-03 4.0058E-03 -2.9207E-05 S11 -2.4200E+00 1.7801E-01 7.9940E-02 9.6790E-03 -1.9224E-03 -9.9498E-03 -7.6738E-03 S12 -6.1474E-01 2.7137E-03 1.7550E-01 -4.9195E-02 1.0819E-02 -1.2717E-02 -2.5518E-03 S13 8.1541E-01 4.5267E-01 -2.6230E-01 6.3949E-02 -3.8125E-03 -1.1748E-02 3.5568E-03 S14 -4.0469E+00 3.7680E-01 -1.0551E-01 3.4568E-02 -2.4173E-02 -1.5517E-02 -1.9688E-03 Face number A18 A20 A22 A24 A26 S1 -3.8163E-06 -6.4560E-06 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.5554E-06 6.8065E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.6579E-05 1.3105E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 2.4765E-05 2.2188E-05 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.2912E-06 2.8128E-06 6.4753E-06 2.2911E-06 -2.2063E-06 S6 -1.6852E-05 -3.6115E-06 -6.1486E-06 -1.3128E-07 -9.7475E-07 S7 3.9898E-05 -1.7814E-06 5.0092E-06 -8.2887E-06 1.1815E-06 S8 5.6722E-05 4.2761E-05 9.2450E-06 1.1839E-05 -3.4268E-06 S9 3.4328E-04 1.2036E-04 -3.2847E-05 -7.0412E-05 -3.9626E-05 S10 -2.4372E-04 -2.7590E-05 -9.7469E-05 -9.0168E-06 4.9856E-05 S11 2.0499E-03 4.6598E-03 -2.3827E-03 -2.3628E-03 -1.2993E-04 S12 5.3605E-03 6.7020E-04 -7.2958E-03 -5.4155E-04 1.9196E-03 S13 1.0845E-03 1.9453E-03 -2.3212E-03 2.2334E-03 -1.1487E-03 S14 -4.7481E-03 -2.7984E-03 -4.0001E-03 3.0813E-03 1.6334E-04

[0091] Table 2

[0092] Figure 2A shows the axial chromatic aberration curve of the imaging lens of Example 1, which represents the deviation of the converging focal points of light rays with different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the imaging lens of Example 1, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 2C shows the distortion curve of the imaging lens of Example 1, which represents the distortion magnitude values corresponding to different image heights. Figure 2D shows the lateral chromatic aberration curve of the imaging lens of Example 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 seen that the imaging lens given in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following will refer to Figures 3 to 4D to describe the imaging lens 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 imaging lens according to Embodiment 2 of the present application.

[0095] As Figure 3 shown, the imaging lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0096] 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 convex. 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 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. The imaging lens has an imaging surface S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0097] In Example 2, the value of the total effective focal length f of the imaging lens is 6.07 mm, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S17 is 7.28 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface ImgH is 6.00 mm, and the value of the maximum field of view FOV is 86.8°.

[0098] Table 3 shows the basic parameter table of the imaging lens in 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 A4 to A for each aspherical mirror surface that can be used in Example 2 30 , where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0099]

[0100] Table 3

[0101]

[0102]

[0103] Table 4

[0104] Figure 4A shows the axial chromatic aberration curve of the imaging lens in Example 2, which represents the deviation of the convergence focal points of light rays of different wavelengths after passing through the lens. Figure 4B shows the astigmatism curve of the imaging lens in Example 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C shows the distortion curve of the imaging lens in Example 2, which represents the distortion magnitude values corresponding to different image heights. Figure 4D shows the lateral chromatic aberration curve of the imaging lens in Example 2, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According toFigures 4A to 4D It can be seen that the imaging lens given in Embodiment 2 can achieve good imaging quality.

[0105] Example 3

[0106] The following refers to Figures 5 to 6D and describes an imaging lens according to Embodiment 3 of the present application. Figure 5 Fig. shows a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application.

[0107] As Figure 5 shown, the imaging lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0108] 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 positive 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 concave, and its image side S8 is convex. 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 convex. The seventh lens E7 has a negative optical 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. The imaging lens has an imaging surface S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0109] In Embodiment 3, the value of the total effective focal length f of the imaging lens is 6.33 mm, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S17 is 7.34 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S17, ImgH, is 6.20 mm, and the value of the maximum field of view FOV is 86.8°.

[0110] Table 5 shows a basic parameter table of the imaging lens of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 6 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 3, and each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0111]

[0112] Table 5

[0113]

[0114]

[0115] Table 6

[0116] Figure 6A shows the axial chromatic aberration curve of the camera lens of Embodiment 3, which represents the deviation of the converging focal points of light rays with different wavelengths after passing through the lens. Figure 6B shows the astigmatism curve of the camera lens 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 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 of Embodiment 3, 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 seen that the camera lens given in Embodiment 3 can achieve good imaging quality.

[0117] Example 4

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

[0119] As Figure 7 shown, the camera lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0120] The first lens E1 has a positive optical power, its object side S1 is a convex surface, and its image side S2 is a concave surface. The second lens E2 has a negative optical power, its object side S3 is a convex surface, and its image side S4 is a concave surface. The third lens E3 has a positive optical power, its object side S5 is a convex surface, and its image side S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side S7 is a concave surface, and its image side S8 is a convex surface. The fifth lens E5 has a negative optical power, its object side S9 is a convex surface, and its image side S10 is a concave surface. The sixth lens E6 has a positive optical power, its object side S11 is a convex surface, and its image side S12 is a concave surface. The seventh lens E7 has a negative optical power, its object side S13 is a concave surface, and its image side S14 is a concave surface. The filter E8 has an object side S15 and an image side S16. The camera lens has an imaging surface S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0121] In Embodiment 4, the value of the total effective focal length f of the imaging lens is 6.14 mm, the value of the on-axis distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 7.19 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S17, ImgH, is 6.20 mm, and the value of the maximum field of view FOV is 88.7°.

[0122] Table 7 shows the basic parameter table of the imaging lens of Embodiment 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 applicable to each aspherical mirror surface in Embodiment 4, where each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0123]

[0124]

[0125] Table 7

[0126] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.5174E-03 -3.2356E-03 -1.3190E-03 -2.0019E-04 -1.3934E-04 -1.1992E-05 -4.9181E-05 S2 -1.4524E-02 -1.6819E-04 -3.1142E-04 4.5723E-05 -1.8286E-04 4.3802E-05 -2.6645E-05 S3 7.0796E-03 4.0120E-04 -9.5573E-04 1.8995E-05 -1.8209E-04 7.5821E-05 -8.4082E-06 S4 5.5238E-02 6.9228E-03 -1.6056E-04 -1.9571E-04 -2.7191E-04 -1.6563E-05 1.3735E-05 S5 -1.7600E-02 2.2743E-02 5.6046E-03 6.3859E-04 -2.6296E-04 -1.6209E-04 -2.0966E-05 S6 -3.9838E-02 2.0898E-02 7.0817E-03 1.8669E-03 3.6266E-04 4.8893E-05 7.7743E-06 S7 -2.0547E-01 -2.1787E-02 -2.3842E-03 3.9831E-04 2.8451E-04 2.9037E-04 1.4512E-04 S8 -3.1135E-01 -3.0285E-02 -6.0982E-03 -8.3601E-04 -6.2822E-04 -6.7137E-05 -7.2072E-05 S9 -8.0652E-01 -1.3610E-02 -1.9759E-02 8.0517E-03 -6.2171E-04 1.3683E-03 5.0898E-04 S10 -1.4381E+00 1.4705E-01 -3.8330E-02 1.8152E-02 -5.7369E-03 3.2096E-03 -6.5331E-05 S11 -2.2180E+00 2.5544E-02 3.1946E-02 1.5648E-02 7.0507E-03 1.7304E-04 -3.3303E-03 S12 -6.4862E-01 -8.6163E-02 1.3085E-01 -3.1750E-02 1.0652E-02 -5.7387E-03 -2.4669E-03 S13 4.0352E-01 4.4937E-01 -1.9772E-01 3.3118E-02 6.2299E-03 -5.6668E-03 9.5115E-04 S14 -3.4080E+00 4.5450E-01 -5.7628E-02 4.5162E-02 -5.0025E-03 -1.0410E-02 1.1313E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -8.5893E-06 -2.2295E-05 4.6452E-06 -4.6591E-06 2.6565E-06 -4.1428E-06 3.4969E-06 S2 1.8272E-05 1.0021E-05 1.8428E-05 8.2686E-06 -6.9432E-07 -8.8680E-06 -1.3427E-06 S3 8.0480E-06 -3.6689E-06 3.0708E-06 8.7246E-06 4.3767E-06 -2.2655E-06 -1.5600E-06 S4 2.7087E-05 3.6534E-06 -2.6512E-06 -3.2580E-06 1.9017E-06 -7.3838E-07 1.6375E-06 S5 2.0903E-05 2.0919E-05 9.3744E-06 3.7770E-06 1.2021E-06 -1.5631E-06 -1.7886E-06 S6 7.2268E-06 4.9033E-06 3.4730E-06 3.6982E-06 1.6648E-06 2.5010E-06 8.9258E-08 S7 1.0736E-04 5.2328E-05 3.8073E-05 1.7679E-05 1.2899E-05 6.4863E-06 2.7341E-06 S8 1.3425E-05 -9.9708E-06 7.9167E-06 -2.0373E-06 4.9367E-06 -2.7251E-06 3.2542E-06 S9 3.2995E-04 1.2103E-04 9.0042E-06 -4.8974E-05 -2.1124E-05 -2.9963E-06 1.0185E-08 S10 4.7323E-05 -3.8067E-05 -7.3894E-05 -2.9419E-05 3.6219E-05 8.6354E-07 -2.8684E-06 S11 -2.5217E-03 1.2308E-03 5.2560E-04 -2.1938E-04 -1.8973E-05 1.5942E-05 -7.7350E-06 S12 1.1261E-04 3.1221E-03 -7.3125E-04 -7.0739E-04 2.4180E-04 -2.8466E-06 -9.3584E-06 S13 -1.8969E-03 2.5193E-03 -1.8553E-03 7.7171E-04 -1.4672E-04 -4.0510E-06 5.3607E-06 S14 -2.3575E-03 7.1378E-04 -3.9667E-03 1.0501E-03 5.4793E-04 2.4728E-04 -1.9505E-04

[0127] Table 8

[0128] Figure 8A Shows the axial chromatic aberration curve of the imaging lens of Embodiment 4, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 8B Shows the astigmatism curve of the imaging lens of Embodiment 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C Shows the distortion curve of the imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights. Figure 8D Shows the lateral chromatic aberration curve of the imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According to Figures 8A to 8D It can be seen that the imaging lens given in Embodiment 4 can achieve good imaging quality.

[0129] Example 5

[0130] The following refers to Figures 9 to 10D Describes the imaging lens according to Embodiment 5 of the present application. Figure 9 Shows the structural schematic diagram of the imaging lens according to Embodiment 5 of the present application.

[0131] As Figure 9 Shown, the imaging lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0132] 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 positive focal power, its object side S5 is convex, and its image side S6 is convex. 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 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. The imaging lens has an imaging surface S17, and the light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0133] In Embodiment 5, the value of the total effective focal length f of the imaging lens is 5.91 mm, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S17 is 7.28 mm, the value of half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 is 6.00 mm, and the value of the maximum field of view FOV is 86.8°.

[0134] Table 9 shows the basic parameter table of the imaging lens of Embodiment 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 5, and each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0135]

[0136]

[0137] Table 9

[0138] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.2037E-03 -4.1465E-03 -2.9821E-03 -1.1193E-03 -4.8785E-04 -1.4996E-04 -9.1894E-05 S2 -4.3005E-03 -3.7937E-04 -7.1672E-04 -4.3206E-05 -1.6827E-05 1.0323E-05 5.2097E-06 S3 2.7469E-02 3.3183E-03 -6.6157E-04 -8.1265E-05 -1.3517E-04 -3.7926E-05 -2.1224E-05 S4 4.7695E-02 6.3669E-03 1.6890E-03 4.3320E-04 -1.0309E-04 -1.5194E-04 -8.2352E-05 S5 -3.1931E-02 1.5924E-02 5.3958E-03 9.2620E-04 -1.1088E-04 -1.5659E-04 -8.8540E-05 S6 -3.0792E-02 1.7507E-02 5.5454E-03 1.0981E-03 1.8386E-04 1.8494E-05 2.8080E-06 S7 -2.3373E-01 -2.4166E-02 -3.9403E-03 -1.7373E-04 2.7656E-04 4.7239E-04 2.3888E-04 S8 -3.0295E-01 -2.7608E-02 -4.9748E-03 -8.6583E-04 -3.2942E-04 1.1106E-05 2.4842E-05 S9 -8.3955E-01 5.3348E-03 -1.3062E-02 8.3121E-03 6.5139E-04 1.6546E-03 2.9915E-04 S10 -1.6157E+00 1.3673E-01 -5.3770E-02 1.1765E-02 -6.5149E-03 2.3807E-03 -7.1321E-04 S11 -2.1135E+00 3.7040E-02 3.5167E-02 3.9109E-02 -2.0560E-03 -5.4795E-03 -4.3274E-03 S12 -7.5793E-01 -3.3298E-02 1.2603E-01 -2.5296E-02 -1.3733E-02 -1.9491E-03 4.2776E-03 S13 7.0038E-01 4.7075E-01 -2.7239E-01 7.2329E-02 -1.7223E-03 -1.0574E-02 2.1071E-03 S14 -3.3351E+00 1.3328E-01 -8.1196E-02 3.1741E-02 1.4506E-02 -1.0393E-02 1.6138E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.6071E-05 -4.5456E-05 -2.4843E-05 -2.1755E-05 -2.4916E-06 2.2808E-06 8.7766E-06 S2 8.6375E-06 6.6830E-06 7.5307E-06 5.1037E-06 1.1529E-06 -2.5799E-06 -1.6252E-06 S3 -7.0767E-06 -4.2628E-06 2.3330E-06 2.9716E-06 4.7579E-06 3.6796E-06 2.9334E-06 S4 -2.5107E-05 6.9930E-06 1.0495E-05 5.8525E-06 -1.4741E-07 2.1609E-07 -3.2877E-07 S5 -1.4691E-05 9.4957E-06 1.8206E-05 8.8885E-06 -1.1150E-06 -7.1871E-06 -3.7974E-06 S6 -5.9013E-06 -1.0761E-06 -9.5801E-08 3.7515E-06 1.2414E-06 6.1295E-07 -1.1565E-06 S7 1.5999E-04 2.9577E-05 1.2172E-05 -2.2281E-05 -6.2070E-06 -9.1803E-06 3.9291E-06 S8 2.3097E-05 1.2625E-05 3.0348E-06 1.7845E-06 -1.3648E-06 4.5173E-06 -4.8458E-07 S9 -1.6729E-04 -3.5754E-04 -2.5694E-04 -1.3461E-04 -4.4380E-05 0.0000E+00 0.0000E+00 S10 5.2641E-05 -2.3216E-04 5.0272E-05 -5.2032E-05 3.9106E-05 -8.6301E-06 1.3722E-06 S11 -1.0653E-03 9.4296E-04 7.7948E-04 -4.3080E-04 -1.6320E-04 4.8300E-05 6.6572E-05 S12 1.0629E-03 9.5669E-04 -1.1695E-03 -9.9174E-04 5.8589E-04 1.7886E-04 -1.1805E-04 S13 -9.7003E-05 1.5118E-03 -3.1855E-03 2.8934E-03 -8.3991E-04 -2.4907E-05 1.6372E-05 S14 -1.3592E-02 7.4484E-04 -7.6730E-03 -2.6618E-04 -9.5428E-04 -2.6402E-05 -1.1432E-03

[0139] Table 10

[0140] Figure 10A Shows the axial chromatic aberration curve of the imaging lens of Embodiment 5, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 10B Shows the astigmatism curve of the imaging lens of Embodiment 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C Shows the distortion curve of the imaging lens of Embodiment 5, which represents the distortion magnitude values corresponding to different image heights. Figure 10D Shows the lateral chromatic aberration curve of the imaging lens of Embodiment 5, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 10A to 10DIt can be seen that the camera lens given in Embodiment 5 can achieve good imaging quality.

[0141] Example 6

[0142] The following refers to Figures 11 to 12D and describes a camera lens according to Embodiment 6 of the present application. Figure 11 FIG. shows a schematic structural diagram of a camera lens according to Embodiment 6 of the present application.

[0143] As Figure 11 shown, the camera lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0144] 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 positive 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 convex 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 convex 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 camera lens has an imaging surface S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0145] In Embodiment 6, the value of the total effective focal length f of the camera lens is 6.19 mm, the value of the on-axis distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 7.24 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S17, ImgH, is 6.20 mm, and the value of the maximum field of view FOV is 88.3°.

[0146] Table 11 shows the basic parameter table of the camera lens of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the higher-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.

[0147]

[0148] Table 11

[0149]

[0150]

[0151] Table 12

[0152] Figure 12A shows the axial chromatic aberration curve of the camera lens of Example 6, which represents the deviation of the convergence focal points of light rays with different wavelengths after passing through the lens. Figure 12B shows the astigmatism curve of the camera lens of Example 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C shows the distortion curve of the camera lens of Example 6, which represents the distortion magnitude values corresponding to different image heights. Figure 12D shows the lateral chromatic aberration curve of the camera lens of Example 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 given in Example 6 can achieve good imaging quality.

[0153] Example 7

[0154] The following refers to Figures 13 to 14D describes a camera lens according to Embodiment 7 of the present application. Figure 13 shows a schematic structural diagram of the camera lens according to Embodiment 7 of the present application.

[0155] As Figure 13 shown, the camera lens sequentially includes, from the object side to the image side along the optical axis: 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, and a filter E8.

[0156] 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 positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive 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 convex. The seventh lens E7 has a negative optical 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. The camera lens has an imaging plane S17, and light from an object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging plane S17.

[0157] In Embodiment 7, the value of the total effective focal length f of the imaging lens is 6.31 mm, the value of the on-axis distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 is 7.41 mm, the value of half of the diagonal length ImgH of the effective pixel region on the imaging surface S17 is 6.20 mm, and the value of the maximum field of view FOV is 87.2°.

[0158] Table 13 shows the basic parameter table of the imaging lens of Embodiment 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 applicable to each aspherical mirror surface in Embodiment 7, where each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0159]

[0160] Table 13

[0161]

[0162]

[0163] Table 14

[0164] Figure 14A Shows the axial chromatic aberration curve of the imaging lens of Embodiment 7, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 14B Shows the astigmatism curve of the imaging lens of Embodiment 7, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C Shows the distortion curve of the imaging lens of Embodiment 7, which represents the distortion magnitude values corresponding to different image heights. Figure 14D Shows the lateral chromatic aberration curve of the imaging lens of Embodiment 7, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According to Figures 14A to 14D It can be seen that the imaging lens given in Embodiment 7 can achieve good imaging quality.

[0165] In summary, Embodiments 1 to 7 respectively satisfy the relationships shown in Table 15.

[0166] Conditional / Example 1 2 3 4 5 6 7 <![CDATA[ImgH 2 / (TTL×f)]]> 0.92 0.81 0.83 0.87 0.84 0.86 0.82 f / R9 + f / R10 2.73 2.59 2.68 2.65 1.99 2.61 2.03 f6 / (R11 + R12) -0.24 -0.25 -0.23 0.09 -0.16 -0.23 -0.22 f7 / (R13 + R14) -1.14 -1.10 -1.14 -1.14 -1.45 -1.13 -1.13 f / R1 - f / R4 0.83 0.64 0.96 0.76 1.30 0.69 0.58 f12 / |R2 - R3| 3.81 1.93 1.99 3.21 2.73 2.63 1.84 f / (f1 + f2) -1.32 -0.80 -1.70 -1.38 -1.10 -1.40 -1.52 f5 / f7 6.06 6.04 14.27 5.19 3.02 6.01 4.81 f / f1 1.11 1.07 1.25 1.12 1.16 1.12 1.16 f / f6 0.91 0.89 0.97 0.83 0.86 0.94 1.00 f / f6 - f / f7 2.19 2.18 2.31 2.11 2.05 2.25 2.34 (T34 + T45) / T34 2.59 2.86 1.80 2.49 2.84 2.45 2.37 (R11 - R13) / R14 0.99 0.98 0.98 0.96 1.08 0.98 0.96 R13 / T67 -3.45 -3.27 -3.87 -3.18 -3.20 -3.72 -4.05 (CT6 - CT5) / (CT6 - CT7) 1.04 0.91 1.60 1.27 1.86 1.00 1.47 (SAG71 + T67) / CT6 -0.79 -0.59 -0.94 -0.56 -0.50 -0.79 -0.93 TTL / ImgH 1.13 1.21 1.18 1.16 1.21 1.17 1.20

[0167] Table 15

[0168] The present application also provides an imaging device which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) element. 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.

[0169] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. Camera lens, characterized in that, It sequentially includes, from the object side to the image side along the optical axis: A first lens with positive optical power, whose object side is convex and image side is concave; A second lens with negative optical power, whose object side is convex and image side is concave; A third lens with optical power, whose object side is convex; A fourth lens with optical power; A fifth lens with negative optical power, whose object side is convex and image side is concave; A sixth lens with positive optical power, whose object side is convex; and A seventh lens with negative optical power, whose object side is concave and image side is concave; At least one of the third lens and the fourth lens has positive optical power; The number of lenses with optical power in the imaging lens is seven; Wherein, the total effective focal length f of the camera lens, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens, and the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the camera lens satisfy: 0.80 ≤ ImgH 2 / (TTL × f) ≤ 0.94; The total effective focal length f of the imaging lens, 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: 1.99 ≤ f / R9 + f / R10 ≤ 2.73; The effective focal length f6 of the sixth lens, the curvature radius R11 of the object side of the sixth lens, and the curvature radius R12 of the image side of the sixth lens satisfy: -0.27 < f6 / (R11 + R12) ≤ 0.1; The curvature radius R11 of the object side of the sixth lens, the curvature radius R13 of the object side of the seventh lens, and the curvature radius R14 of the image side of the seventh lens satisfy: 0.94 ≤ (R11 - R13) / R14 < 1.10; 2. The camera lens according to claim 1, wherein The effective focal length f7 of the seventh lens, the curvature radius R13 of the object side of the seventh lens, and the curvature radius R14 of the image side of the seventh lens satisfy: -1.45 ≤ f7 / (R13 + R14) ≤ -1.10; 3. The camera lens according to claim 1, wherein The total effective focal length f of the imaging lens, the curvature radius R1 of the object side of the first lens, and the curvature radius R4 of the image side of the second lens satisfy: 0.55 < f / R1 - f / R4 < 1.33; 4. The camera lens according to claim 1, characterized in that, The combined focal length f12 of the first lens and the second lens, the curvature radius R2 of the image side of the first lens, and the curvature radius R3 of the object side of the second lens satisfy: 1.8 ≤ f12 / |R2 - R3| < 3.85; 5. The camera lens according to claim 1, characterized in that, The total effective focal length f of the imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: -1.70 ≤ f / (f1 + f2) ≤ -0.8; 6. The camera lens according to claim 1, characterized in that, The effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 3 ≤ f5 / f7 ≤ 14.27; 7. The imaging lens according to claim 1, characterized in that, The total effective focal length f of the imaging lens and the effective focal length f1 of the first lens satisfy: 1.07 ≤ f / f1 ≤ 1.25; 8. The imaging lens according to any one of claims 1 to 7, characterized in that, The total effective focal length f of the imaging lens and the effective focal length f6 of the sixth lens satisfy: 0.8 ≤ f / f6 ≤ 1.0; 9. The camera lens according to any one of claims 1 to 7, characterized in that, The total effective focal length f of the imaging lens, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens satisfy: 2.02 ≤ f / f6 - f / f7 < 2.35; 10. The camera lens according to any one of claims 1 to 7, characterized in that, The axial interval distance T34 between the third lens and the fourth lens and the axial interval distance T45 between the fourth lens and the fifth lens satisfy: 1.8 ≤ (T34 + T45) / T34 < 2.

90.

11. The camera lens according to any one of claims 1 to 7, characterized in that, The radius of curvature R13 of the object side surface of the seventh lens and the axial interval distance T67 between the sixth lens and the seventh lens satisfy: -4.05 ≤ R13 / T67 < -3.

15.

12. The camera lens according to any one of claims 1 to 7, characterized in that, The central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.9 ≤ (CT6 - CT5) / (CT6 - CT7) < 1.

90.

13. The camera lens according to any one of claims 1 to 7, characterized in that, The axial distance SAG71 between the intersection point of the object side surface of the seventh lens and the optical axis and the vertex of the maximum effective radius of the object side surface of the seventh lens, the axial interval distance T67 between the sixth lens and the seventh lens, and the central thickness CT6 of the sixth lens on the optical axis satisfy: -0.95 ≤ (SAG71 + T67) / CT6 ≤ -0.

5.

14. The camera lens according to any one of claims 1 to 7, 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 and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: 1.10 < TTL / ImgH < 1.25.

Images