Photographic lens

Abstract

This application discloses a photographic lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object side to the image side. The first and sixth lenses have the same optical power for both positive and negative attributes, and the second and seventh lenses also have the same optical power for both positive and negative attributes. The photographic lens satisfies: TD / ImgH ≤ 1.1, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the photographic lens, and TD is the distance along the optical axis from the object side of the first lens to the image side of the seventh lens. At least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to a photographic lens. Background Technology

[0002] In recent years, with the development of mobile electronic devices such as smartphones, consumers have increasingly higher demands for the shooting quality of smartphones. Typically, the camera lenses mounted on smartphones, such as the rear main camera lens, are becoming larger due to their increasingly larger imaging area, resulting in more and more lens elements and a larger overall lens height. This causes the lens to protrude from the phone's surface, affecting its aesthetics.

[0003] Therefore, how to reduce the overall height of the lens while ensuring a large image size is one of the problems that many lens designers urgently need to solve. Summary of the Invention

[0004] This application provides a photographic lens comprising, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first and sixth lenses have the same optical power for both positive and negative attributes, as do the second and seventh lenses. The photographic lens satisfies the following condition: TD / ImgH ≤ 1.1, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the photographic lens, and TD is the distance along the optical axis from the object side of the first lens to the image side of the seventh lens. At least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror.

[0005] In one embodiment, the camera lens can satisfy: 2 < f6 / f - f7 / f < 2.6, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the total effective focal length of the camera lens.

[0006] In one embodiment, the image-side surface of the fourth lens is concave. The photographic lens can satisfy: -1 < (R7 - R8) / (R7 + R8) < 1 and CT4 > 0.3 mm, where R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

[0007] In one embodiment, the image-side surface of the fifth lens is concave. The photographic lens can satisfy: 15 < R10 / T56 < 30, where T56 is the air gap between the fifth and sixth lenses on the optical axis, and R10 is the radius of curvature of the image-side surface of the fifth lens.

[0008] In one embodiment, the camera lens may satisfy: 10 < V3 / N3 < 40, where N3 is the refractive index of the third lens and V3 is the dispersion coefficient of the third lens.

[0009] In one embodiment, the camera lens may satisfy: 0.3 < (V2 + V3) / (V6 + V7) < 0.7, where V2 is the dispersion coefficient of the second lens, V3 is the dispersion coefficient of the third lens, V6 is the dispersion coefficient of the sixth lens, and V7 is the dispersion coefficient of the seventh lens.

[0010] In one embodiment, the camera lens may satisfy: 7 < f56 / (CT5+CT6) < 18, where f56 is the combined focal length of the fifth and sixth lenses, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0011] In one embodiment, the camera lens may satisfy: 0.6 < |SAG51 / CT5| < 2, where SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens, and CT5 is the center thickness of the fifth lens on the optical axis.

[0012] In one implementation, the imaging surface of the camera lens is curved.

[0013] In one embodiment, the camera lens may satisfy: 0.5 < ∑CT / TD < 0.8, where ∑CT is the sum of the center thicknesses of the first lens to the seventh lens on the optical axis, and TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens.

[0014] In one implementation, the camera lens may satisfy: Fno < 2.0, where Fno is the aperture value of the camera lens.

[0015] This application also provides a photographic lens comprising, in sequence along the optical axis from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first and sixth lenses have the same optical power for both positive and negative properties, and the second and seventh lenses also have the same optical power for both positive and negative properties. The photographic lens satisfies the following condition: 0.5 < ∑CT / TD < 0.8, where ∑CT is the sum of the center thicknesses of the first to seventh lenses along the optical axis, and TD is the distance along the optical axis from the object side of the first lens to the image side of the seventh lens. Furthermore, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror.

[0016] In one embodiment, the camera lens can satisfy: 2 < f6 / f - f7 / f < 2.6, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the total effective focal length of the camera lens.

[0017] In one embodiment, the image-side surface of the fourth lens is concave. The photographic lens can satisfy: -1 < (R7 - R8) / (R7 + R8) < 1 and CT4 > 0.3 mm, where R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

[0018] In one embodiment, the image-side surface of the fifth lens is concave. The photographic lens can satisfy: 15 < R10 / T56 < 30, where T56 is the air gap between the fifth and sixth lenses on the optical axis, and R10 is the radius of curvature of the image-side surface of the fifth lens.

[0019] In one embodiment, the camera lens may satisfy: 10 < V3 / N3 < 40, where N3 is the refractive index of the third lens and V3 is the dispersion coefficient of the third lens.

[0020] In one embodiment, the camera lens may satisfy: 0.3 < (V2 + V3) / (V6 + V7) < 0.7, where V2 is the dispersion coefficient of the second lens, V3 is the dispersion coefficient of the third lens, V6 is the dispersion coefficient of the sixth lens, and V7 is the dispersion coefficient of the seventh lens.

[0021] In one embodiment, the camera lens may satisfy: 7 < f56 / (CT5+CT6) < 18, where f56 is the combined focal length of the fifth and sixth lenses, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0022] In one embodiment, the camera lens may satisfy: 0.6 < |SAG51 / CT5| < 2, where SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens, and CT5 is the center thickness of the fifth lens on the optical axis.

[0023] In one implementation, the imaging surface of the camera lens is curved.

[0024] In one implementation, the camera lens may satisfy: Fno < 2.0, where Fno is the aperture value of the camera lens.

[0025] In an exemplary embodiment of this application, by reasonably setting the optical power distribution of the seven lenses, the first two lenses, and the last two lenses, and with TD / ImgH ≤ 1.1, the camera lens provided by this application can have both a large image height and a small height, thus meeting the requirements of ultra-thin mobile phones and other devices for camera lenses mounted on them. This also helps to reduce lens aberrations and improve image quality. For example, by controlling the relationship between half the diagonal length of the effective pixel area on the imaging surface of the camera lens and the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, the overall image height and height of the camera lens can be reasonably adjusted, improving the assembly feasibility of the camera lens. Furthermore, by setting the optical power distribution of lenses such as the first, second, sixth, and seventh lenses, it helps to balance the optical power of the camera lens, reduce lens aberrations, and improve image quality.

[0026] In another exemplary embodiment of this application, by reasonably setting the optical power distribution of the seven lenses, the first two lenses, and the last two lenses, and by using 0.5 < ∑CT / TD < 0.8, the photographic lens provided by this application can have both a large image height and a small height, thus meeting the needs of ultra-thin mobile phones and other devices for photographic lenses mounted on them. This also helps to reduce lens aberrations and improve image quality. For example, by controlling the sum of the center thicknesses of the first to seventh lenses and the axial distance between the object side of the first lens and the image side of the seventh lens, the overall height of the lens can be controlled, improving the overall assembly feasibility of the lens. Furthermore, by setting the optical power distribution of the first, second, sixth, and seventh lenses, it helps to balance the optical power of the photographic lens, reduce lens aberrations, and improve image quality. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a photographic lens according to Embodiment 1 of this application;

[0029] Figures 2A to 2C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 1 are shown respectively.

[0030] Figure 3 This is a schematic diagram of the structure of a photographic lens according to Embodiment 2 of this application;

[0031] Figures 4A to 4C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 2 are shown respectively.

[0032] Figure 5This is a schematic diagram of the structure of a photographic lens according to Embodiment 3 of this application;

[0033] Figures 6A to 6C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 3 are shown respectively.

[0034] Figure 7 This is a schematic diagram of the structure of a photographic lens according to Embodiment 4 of this application;

[0035] Figures 8A to 8C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 4 are shown respectively.

[0036] Figure 9 This is a schematic diagram of the structure of a photographic lens according to Embodiment 5 of this application;

[0037] Figures 10A to 10C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 5 are shown respectively.

[0038] Figure 11 This is a schematic diagram of the structure of a photographic lens according to Embodiment 6 of this application;

[0039] Figures 12A to 12C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 6 are shown respectively.

[0040] Figure 13 This is a schematic diagram of the structure of a photographic lens according to Embodiment 7 of this application;

[0041] Figures 14A to 14C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 7 are shown respectively.

[0042] Figure 15 This is a schematic diagram of the structure of a photographic lens according to Embodiment 8 of this application; and

[0043] Figures 16A to 16C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the photographic lens of Example 8 are shown respectively. Detailed Implementation

[0044] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0045] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0046] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0047] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness 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 subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0048] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0049] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0051] The features, principles and other aspects of this application are described in detail below.

[0052] A photographic lens according to an exemplary embodiment of this application may include seven lenses with 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 sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first to seventh lenses may have a gap distance.

[0053] In an exemplary embodiment of this application, the first lens and the sixth lens may have the same optical power with both positive and negative properties, and the second lens and the seventh lens may have the same optical power with both positive and negative properties. For example, the first lens may have a positive optical power; the second lens may have a negative optical power; the sixth lens may have a positive optical power; and the seventh lens may have a negative optical power. Exemplarily, the third lens, the fourth lens, and the fifth lens may all have either a positive or a negative optical power.

[0054] The photographic lens according to this application can satisfy: TD / ImgH≤1.1, where ImgH is half the diagonal length of the effective pixel area on the imaging surface of the photographic lens, and TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens.

[0055] In this application, by rationally setting the optical power distribution of the seven lenses, the first two lenses, and the last two lenses, and with TD / ImgH ≤ 1.1, the photographic lens provided by this application can have both a large image height and a small height, meeting the requirements of ultra-thin mobile phones and other devices for photographic lenses mounted on them. It also helps to reduce lens aberrations and improve image quality. For example, by controlling the relationship between half the diagonal length of the effective pixel area on the imaging surface of the photographic lens and the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, the overall image height and height of the photographic lens can be rationally adjusted, improving the assembly feasibility of the photographic lens. Furthermore, by setting the optical power distribution of the first, second, sixth, and seventh lenses, it helps to balance the optical power of the photographic lens, reduce lens aberrations, and improve image quality.

[0056] In an exemplary embodiment, the photographic lens according to this application satisfies the following condition: 0.5 < ∑CT / TD < 0.8, where ∑CT is the sum of the center thicknesses of the first lens to the seventh lens along the optical axis, and TD is the distance along the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens. By satisfying 0.5 < ∑CT / TD < 0.8, the overall height of the lens can be controlled by adjusting the sum of the center thicknesses of the first lens to the seventh lens and the axial distance between the object-side surface of the first lens and the image-side surface of the seventh lens, thereby improving the overall assembly feasibility of the lens.

[0057] In this application, by rationally setting the optical power distribution of the seven lenses, the first two lenses, and the last two lenses, and by using 0.5 < ∑CT / TD < 0.8, the photographic lens provided by this application can have both a large image height and a small height, thus meeting the requirements of ultra-thin mobile phones and other devices for their mounted photographic lenses. Simultaneously, it also helps to reduce lens aberrations and improve image quality. For example, by controlling the total thickness of the center of the first to seventh lenses and the axial distance from the object side of the first lens to the image side of the seventh lens, the overall height of the lens can be controlled, improving the overall assembly feasibility of the lens. Furthermore, by setting the optical power distribution of the first, second, sixth, and seventh lenses, it helps to balance the optical power of the photographic lens, reduce lens aberrations, and improve image quality.

[0058] In an exemplary embodiment, the photographic lens according to this application satisfies: 2 < f6 / f - f7 / f < 2.6, where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the total effective focal length of the photographic lens. By satisfying 2 < f6 / f - f7 / f < 2.6, the optical power of the sixth and seventh lenses can be rationally set by controlling the relationship between their effective focal lengths and the total effective focal length of the photographic lens, thereby achieving the goals of reducing lens aberrations and improving image quality.

[0059] In an exemplary embodiment, the image-side surface of the fourth lens is concave. The photographic lens according to this application satisfies: -1 < (R7 - R8) / (R7 + R8) < 1 and CT4 > 0.3 mm, where R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and CT4 is the center thickness of the fourth lens along the optical axis. Satisfying -1 < (R7 - R8) / (R7 + R8) < 1 and CT4 > 0.3 mm allows for better manufacturability of the fourth lens by controlling the radii of curvature of its object-side and image-side surfaces and its center thickness along the optical axis.

[0060] In an exemplary embodiment, the image-side surface of the fifth lens is concave. The photographic lens according to this application satisfies: 15 < R10 / T56 < 30, where T56 is the air gap between the fifth and sixth lenses on the optical axis, and R10 is the radius of curvature of the image-side surface of the fifth lens. Satisfying 15 < R10 / T56 < 30 allows for better manufacturability of the fifth lens by controlling the air gap between the fifth and sixth lenses on the optical axis and the radius of curvature of the image-side surface of the fifth lens, while also improving the assembly stability of the fifth and sixth lenses.

[0061] In an exemplary embodiment, the photographic lens according to this application satisfies: 10 < V3 / N3 < 40, where N3 is the refractive index of the third lens and V3 is the dispersion coefficient of the third lens. Satisfying 10 < V3 / N3 < 40 allows for effective reduction of aberrations and chromatic aberrations in the photographic lens by controlling the refractive index and dispersion coefficient of the third lens, thereby improving the overall optical image quality of the lens.

[0062] In an exemplary embodiment, the photographic lens according to this application satisfies: 0.3 < (V2 + V3) / (V6 + V7) < 0.7, where V2 is the dispersion coefficient of the second lens, V3 is the dispersion coefficient of the third lens, V6 is the dispersion coefficient of the sixth lens, and V7 is the dispersion coefficient of the seventh lens. By satisfying 0.3 < (V2 + V3) / (V6 + V7) < 0.7, aberrations and chromatic aberrations of the photographic lens can be effectively reduced by controlling the dispersion coefficients of the second, third, sixth, and seventh lenses.

[0063] In an exemplary embodiment, the photographic lens according to this application satisfies: 7 < f56 / (CT5+CT6) < 18, where f56 is the combined focal length of the fifth and sixth lenses, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. Satisfying 7 < f56 / (CT5+CT6) < 18 allows for the reduction of lens aberrations by controlling the combined focal length of the fifth and sixth lenses, and simultaneously improves the manufacturability of the fifth and sixth lenses by controlling their center thicknesses on the optical axis.

[0064] In an exemplary embodiment, the photographic lens according to this application satisfies: 0.6 < |SAG51 / CT5| < 2, where SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens, and CT5 is the center thickness of the fifth lens on the optical axis. Satisfying 0.6 < |SAG51 / CT5| < 2 improves the manufacturability of the fifth lens by controlling the on-axis distance from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens, and the center thickness of the fifth lens on the optical axis.

[0065] In an exemplary embodiment, the imaging surface of the photographic lens provided in this application can be curved. In this application, by controlling the imaging surface to be curved, the chip located on the imaging surface can be a curved chip, thereby obtaining a photographic lens with a large CRA (Chip Area Reduction). A photographic lens with a large CRA can effectively reduce the overall height of the lens, while also improving the relative illumination and image quality of the lens.

[0066] In an exemplary embodiment, the photographic lens according to this application satisfies: Fno < 2.0, where Fno is the aperture value of the photographic lens. Satisfying Fno < 2.0 allows control of the aperture size of the photographic lens by controlling its aperture value, thereby facilitating control of the amount of light transmitted through the lens and enabling the lens to have good image quality in both low-light and normal environments.

[0067] In an exemplary embodiment, the photographic lens according to this application further includes an aperture stop disposed between the object side and the first lens. Optionally, the photographic lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. This application proposes a photographic lens with characteristics such as large image height, small overall height, small chromatic aberration, and high image quality. The photographic lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, incident light can be effectively converged, the overall optical length of the imaging lens can be reduced, and the manufacturability of the imaging lens can be improved, making the photographic lens more conducive to production and processing. The photographic lens provided by this application can reduce the overall height of the lens without affecting the relative illumination of the external field of view, thereby helping to meet the needs of ultra-thin mobile phones and other devices for photographic lenses such as rear lenses mounted on them.

[0068] In the embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one mirror surface from 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 its curvature changes continuously from the center to the periphery of the lens. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, and seventh lenses is an aspherical mirror surface. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, and seventh lenses are aspherical mirror surfaces.

[0069] However, those skilled in the art will understand that the number of lenses constituting the photographic lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiment, the photographic lens is not limited to including seven lenses. If desired, the photographic lens may also include other numbers of lenses.

[0070] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the photographic lens applicable to the above-described embodiments.

[0071] Example 1

[0072] The following is for reference Figures 1 to 2C A photographic lens according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of a camera lens according to Embodiment 1 of this application is shown.

[0073] like Figure 1 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0074] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0075] Table 1 shows the basic parameters of the photographic lens of Example 1, where the units for radius of curvature, thickness / distance, and focal length are millimeters (mm).

[0076]

[0077] Table 1

[0078] In this example, the total effective focal length f of the camera lens is 6.48 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.41 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0079] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0080]

[0081] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; 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 i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A14 that can be used for each aspherical mirror S1-S14 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0082] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.7401E-04 2.9346E-03 -9.2449E-03 2.2284E-02 -3.4811E-02 3.3565E-02 -1.8406E-02 S2 -2.4684E-02 3.8260E-02 -7.4934E-02 1.9642E-01 -4.2810E-01 6.7111E-01 -7.4977E-01 S3 -3.4205E-02 4.5840E-02 -4.8850E-02 7.6669E-02 -1.0718E-01 6.1858E-02 9.1456E-02 S4 -1.3947E-02 -6.8359E-03 2.1386E-01 -1.0590E+00 3.2829E+00 -6.9542E+00 1.0369E+01 S5 -2.4021E-02 4.3429E-03 -4.8144E-02 2.1881E-01 -5.8888E-01 1.0197E+00 -1.1821E+00 S6 -2.6544E-02 -2.6354E-02 2.0683E-01 -8.1496E-01 2.1104E+00 -3.7720E+00 4.7872E+00 S7 -3.0402E-02 -1.1295E-02 7.9509E-02 -2.0575E-01 3.4908E-01 -4.0922E-01 3.4197E-01 S8 -2.3981E-02 -1.4172E-02 6.3460E-02 -1.4559E-01 2.1958E-01 -2.3139E-01 1.7535E-01 S9 -3.3778E-02 -2.9374E-03 1.9663E-02 -2.9355E-02 2.3164E-02 -8.5854E-03 -2.5914E-03 S10 -6.1012E-02 1.8791E-02 -1.1527E-02 1.3813E-02 -1.4103E-02 9.2976E-03 -4.0959E-03 S11 -3.0609E-02 -9.1067E-03 9.0664E-03 -4.6648E-03 1.7097E-03 -4.9780E-04 1.1191E-04 S12 6.0461E-03 -2.3014E-02 1.1876E-02 -3.8561E-03 8.7146E-04 -1.4771E-04 1.9964E-05 S13 -7.0103E-02 -4.6218E-04 5.3583E-03 -1.2394E-03 1.1741E-04 -2.4404E-08 -1.3290E-06 S14 -7.0810E-02 1.0952E-02 -6.1716E-04 -1.2024E-04 3.9376E-05 -6.1385E-06 6.3474E-07

[0083] Table 2-1

[0084] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.3307E-03 2.6298E-03 -2.2533E-03 8.2318E-04 -1.6762E-04 1.8495E-05 -8.6514E-07 S2 6.0182E-01 -3.4787E-01 1.4351E-01 -4.1212E-02 7.8242E-03 -8.8245E-04 4.4752E-05 S3 -2.4311E-01 2.6465E-01 -1.7196E-01 7.0960E-02 -1.8289E-02 2.6933E-03 -1.7338E-04 S4 -1.1028E+01 8.3868E+00 -4.5161E+00 1.6782E+00 -4.0845E-01 5.8457E-02 -3.7185E-03 S5 9.2698E-01 -4.8548E-01 1.6272E-01 -3.1582E-02 2.7021E-03 0.0000E+00 0.0000E+00 S6 -4.3771E+00 2.8912E+00 -1.3665E+00 4.5043E-01 -9.8318E-02 1.2767E-02 -7.4643E-04 S7 -2.0669E-01 9.0404E-02 -2.8261E-02 6.1363E-03 -8.7653E-04 7.3854E-05 -2.7733E-06 S8 -9.6655E-02 3.8727E-02 -1.1140E-02 2.2375E-03 -2.9729E-04 2.3429E-05 -8.2746E-07 S9 5.3653E-03 -3.3748E-03 1.2339E-03 -2.8479E-04 4.0917E-05 -3.3459E-06 1.1898E-07 S10 1.2521E-03 -2.6950E-04 4.0719E-05 -4.2312E-06 2.8832E-07 -1.1613E-08 2.0972E-10 S11 -1.8386E-05 2.1457E-06 -1.7513E-07 9.7739E-09 -3.5591E-10 7.6339E-12 -7.3281E-14 S12 -2.2054E-06 1.9551E-07 -1.3298E-08 6.5564E-10 -2.1797E-11 4.3395E-13 -3.8927E-15 S13 1.7584E-07 -1.2903E-08 6.1761E-10 -1.9823E-11 4.1444E-13 -5.1289E-15 2.8606E-17 S14 -4.6163E-08 2.3799E-09 -8.5680E-11 2.0778E-12 -3.1716E-14 2.6627E-16 -8.7446E-19

[0085] Table 2-2

[0086] Figure 2A The on-axis chromatic aberration curve of the camera lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 2B The astigmatism curve of the camera lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the photographic lens of Embodiment 1 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 2A to 2C It can be seen that the camera lens given in Example 1 can achieve good image quality.

[0087] Example 2

[0088] The following is for reference Figures 3 to 4C A photographic lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 3 A schematic diagram of the structure of a camera lens according to Embodiment 2 of this application is shown.

[0089] like Figure 3As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0090] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0091] In this example, the total effective focal length f of the camera lens is 7.24 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.73 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0092] Table 3 shows the basic parameters of the photographic lens of Example 2, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0093]

[0094]

[0095] Table 3

[0096] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.7539E-04 -1.8077E-04 9.2519E-03 -3.5171E-02 7.2982E-02 -9.7620E-02 8.9239E-02 S2 -8.5081E-03 1.7321E-02 -4.7506E-02 1.1869E-01 -2.0756E-01 2.5257E-01 -2.1880E-01 S3 -1.3957E-02 9.0148E-03 5.5083E-03 1.7350E-02 -1.2564E-01 2.9115E-01 -3.8968E-01 S4 -9.8262E-03 3.1330E-02 -1.5940E-01 7.0129E-01 -2.0349E+00 4.0238E+00 -5.5929E+00 S5 -1.4292E-02 -7.2178E-03 -6.9451E-03 1.0540E-01 -4.1534E-01 9.6768E-01 -1.5132E+00 S6 -8.6566E-03 -3.6181E-02 1.4898E-01 -4.3582E-01 8.9605E-01 -1.3041E+00 1.3620E+00 S7 -1.4350E-02 -3.5440E-02 9.8572E-02 -1.7250E-01 2.1188E-01 -1.8595E-01 1.1830E-01 S8 -1.8872E-02 -1.1013E-02 2.2571E-02 -2.4120E-02 1.4809E-02 -3.5084E-03 -2.0458E-03 S9 -2.4868E-02 -1.0515E-02 1.0339E-02 1.6555E-02 -4.7365E-02 5.3634E-02 -3.7171E-02 S10 -4.4530E-02 -1.1386E-02 3.3322E-02 -3.3003E-02 2.0877E-02 -9.4117E-03 3.1290E-03 S11 -1.9272E-02 -1.9823E-02 1.8312E-02 -1.0735E-02 4.3070E-03 -1.2064E-03 2.3810E-04 S12 8.1117E-03 -2.5413E-02 1.5457E-02 -6.7859E-03 2.1769E-03 -5.0525E-04 8.4947E-05 S13 -9.3041E-02 1.6594E-02 -1.0213E-04 -3.4473E-04 5.3406E-05 -3.2179E-06 -7.0413E-08 S14 -9.6840E-02 2.5202E-02 -5.7902E-03 1.2351E-03 -2.0533E-04 2.3379E-05 -1.6658E-06

[0097] Table 4-1

[0098] Face number A18 A20 A22 A24 A26 A28 A30 S1 -5.7262E-02 2.6032E-02 -8.3411E-03 1.8418E-03 -2.6676E-04 2.2813E-05 -8.7339E-07 S2 1.3689E-01 -6.2025E-02 2.0154E-02 -4.5760E-03 6.8898E-04 -6.1779E-05 2.4962E-06 S3 3.4154E-01 -2.0479E-01 8.4860E-02 -2.3947E-02 4.3993E-03 -4.7480E-04 2.2858E-05 S4 5.5612E+00 -3.9751E+00 2.0261E+00 -7.1849E-01 1.6840E-01 -2.3449E-02 1.4686E-03 S5 1.6574E+00 -1.2890E+00 7.0869E-01 -2.6922E-01 6.7210E-02 -9.9177E-03 6.5532E-04 S6 -1.0290E+00 5.6251E-01 -2.2011E-01 6.0055E-02 -1.0845E-02 1.1644E-03 -5.6246E-05 S7 -5.4906E-02 1.8542E-02 -4.4974E-03 7.6187E-04 -8.5446E-05 5.6943E-06 -1.7056E-07 S8 2.3215E-03 -1.0901E-03 3.0907E-04 -5.5951E-05 6.3268E-06 -4.0731E-07 1.1395E-08 S9 1.7396E-02 -5.6796E-03 1.2984E-03 -2.0392E-04 2.0964E-05 -1.2696E-06 3.4313E-08 S10 -7.7765E-04 1.4479E-04 -1.9934E-05 1.9636E-06 -1.3022E-07 5.1807E-09 -9.2988E-11 S11 -3.3319E-05 3.3120E-06 -2.3224E-07 1.1235E-08 -3.5713E-10 6.7198E-12 -5.6765E-14 S12 -1.0381E-05 9.2063E-07 -5.8592E-08 2.6057E-09 -7.6811E-11 1.3472E-12 -1.0630E-14 S13 2.8712E-08 -2.5433E-09 1.2971E-10 -4.2232E-12 8.6837E-14 -1.0285E-15 5.3309E-18 S14 5.7503E-08 1.1823E-09 -2.4177E-10 1.2782E-11 -3.6124E-13 5.5244E-15 -3.6092E-17

[0099] Table 4-2

[0100] Figure 4AThe on-axis chromatic aberration curve of the camera lens of Embodiment 2 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 4B The astigmatism curve of the camera lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The distortion curve of the camera lens in Example 2 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 4A to 4C It can be seen that the camera lens given in Example 2 can achieve good image quality.

[0101] Example 3

[0102] The following is for reference Figures 5 to 6C A photographic lens according to Embodiment 3 of this application is described. Figure 5 A schematic diagram of the structure of a camera lens according to Embodiment 3 of this application is shown.

[0103] like Figure 5 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0104] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0105] In this example, the total effective focal length f of the camera lens is 7.25mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.74mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43mm.

[0106] Table 5 shows the basic parameters of the photographic lens of Example 3, where the units for radius of curvature, thickness / distance, and focal length are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 3, where each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0107]

[0108]

[0109] Table 5

[0110] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.7188E-04 -4.9759E-03 2.6015E-02 -7.1900E-02 1.2675E-01 -1.5221E-01 1.2856E-01 S2 -7.9427E-03 1.5214E-02 -3.7921E-02 8.9179E-02 -1.4877E-01 1.7343E-01 -1.4441E-01 S3 -1.4276E-02 1.0523E-02 -1.8900E-03 4.2670E-02 -1.8545E-01 3.8931E-01 -5.0310E-01 S4 -1.0040E-02 3.0791E-02 -1.5285E-01 6.6360E-01 -1.8884E+00 3.6510E+00 -4.9587E+00 S5 -1.2210E-02 -2.9214E-02 1.2153E-01 -3.6587E-01 7.4603E-01 -1.0352E+00 9.6444E-01 S6 -1.0771E-02 -1.7348E-02 5.5609E-02 -1.4953E-01 3.1470E-01 -4.8793E-01 5.4828E-01 S7 -1.7030E-02 -2.1719E-02 5.7281E-02 -9.3177E-02 1.0937E-01 -9.3555E-02 5.8932E-02 S8 -1.9834E-02 -7.0516E-03 1.3162E-02 -8.9517E-03 -2.1659E-03 9.9527E-03 -9.7269E-03 S9 -2.5973E-02 -7.9035E-03 7.3470E-03 1.5847E-02 -4.0651E-02 4.4215E-02 -2.9848E-02 S10 -4.6321E-02 -6.9739E-03 2.4395E-02 -2.1767E-02 1.1710E-02 -4.3142E-03 1.1352E-03 S11 -1.9598E-02 -1.8937E-02 1.7193E-02 -9.9472E-03 3.9692E-03 -1.1112E-03 2.1959E-04 S12 8.0563E-03 -2.5129E-02 1.4997E-02 -6.4851E-03 2.0656E-03 -4.7894E-04 8.0718E-05 S13 -9.2162E-02 1.5728E-02 2.8780E-04 -4.5746E-04 7.7299E-05 -7.0724E-06 4.0098E-07 S14 -9.6162E-02 2.4646E-02 -5.6545E-03 1.2426E-03 -2.1700E-04 2.6501E-05 -2.1362E-06

[0111] Table 6-1

[0112] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.7589E-02 3.3576E-02 -1.0327E-02 2.2026E-03 -3.0953E-04 2.5772E-05 -9.6306E-07 S2 8.7144E-02 -3.8221E-02 1.2065E-02 -2.6697E-03 3.9292E-04 -3.4533E-05 1.3710E-06 S3 4.3459E-01 -2.5908E-01 1.0719E-01 -3.0265E-02 5.5690E-03 -6.0233E-04 2.9063E-05 S4 4.8217E+00 -3.3755E+00 1.6881E+00 -5.8848E-01 1.3584E-01 -1.8660E-02 1.1547E-03 S5 -5.6901E-01 1.6669E-01 2.3227E-02 -4.2765E-02 1.7394E-02 -3.3643E-03 2.6523E-04 S6 -4.4489E-01 2.5969E-01 -1.0778E-01 3.0991E-02 -5.8636E-03 6.5617E-04 -3.2887E-05 S7 -2.7389E-02 9.3311E-03 -2.2928E-03 3.9417E-04 -4.4874E-05 3.0335E-06 -9.2064E-08 S8 5.4993E-03 -2.0425E-03 5.1340E-04 -8.6505E-05 9.3485E-06 -5.8485E-07 1.6087E-08 S9 1.3706E-02 -4.4116E-03 9.9787E-04 -1.5548E-04 1.5888E-05 -9.5773E-07 2.5783E-08 S10 -2.2052E-04 3.3231E-05 -4.0728E-06 4.0185E-07 -2.9028E-08 1.3010E-09 -2.6336E-11 S11 -3.0757E-05 3.0575E-06 -2.1417E-07 1.0340E-08 -3.2772E-10 6.1431E-12 -5.1655E-14 S12 -9.9014E-06 8.8164E-07 -5.6309E-08 2.5110E-09 -7.4145E-11 1.3012E-12 -1.0262E-14 S13 -1.4301E-08 3.3456E-10 -8.6435E-12 4.1150E-13 -1.5676E-14 3.1565E-16 -2.5751E-18 S14 1.0387E-07 -1.9517E-09 -9.4788E-11 8.0624E-12 -2.6188E-13 4.2850E-15 -2.9125E-17

[0113] Table 6-2

[0114] Figure 6A The on-axis chromatic aberration curve of the camera lens of Embodiment 3 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 6B The astigmatism curve of the camera lens 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 in Example 3 is shown, representing the distortion magnitude corresponding to different image heights. According to... Figures 6A to 6C It can be seen that the camera lens given in Example 3 can achieve good image quality.

[0115] Example 4

[0116] The following is for reference Figures 7 to 8C A photographic lens according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the structure of a camera lens according to Embodiment 4 of this application is shown.

[0117] like Figure 7 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0118] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0119] In this example, the total effective focal length f of the camera lens is 6.51 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.39 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0120] Table 7 shows the basic parameters of the photographic lens of Example 4, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0121]

[0122]

[0123] Table 7

[0124] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.3724E-04 -3.8111E-04 2.9870E-03 -5.7427E-03 5.7095E-03 -3.3891E-03 1.3459E-03 S2 -2.2555E-02 2.6934E-02 -2.0409E-02 1.0966E-02 -2.9312E-03 -9.3303E-04 1.1616E-03 S3 -2.9805E-02 2.9886E-02 2.2612E-02 -1.4853E-01 3.3771E-01 -4.7415E-01 4.4273E-01 S4 -1.2183E-02 5.6206E-03 9.8613E-02 -4.8428E-01 1.4059E+00 -2.7429E+00 3.7228E+00 S5 -2.6826E-02 6.1269E-02 -4.6345E-01 2.0572E+00 -5.8603E+00 1.1237E+01 -1.4910E+01 S6 -2.5626E-02 -2.6045E-02 1.9940E-01 -7.4605E-01 1.8246E+00 -3.0695E+00 3.6528E+00 S7 -3.0353E-02 -4.0914E-03 3.6019E-02 -6.3809E-02 6.3149E-02 -2.5811E-02 -1.5659E-02 S8 -2.3858E-02 -3.3999E-03 2.5989E-02 -7.4076E-02 1.3186E-01 -1.5828E-01 1.3299E-01 S9 -3.3010E-02 1.6229E-02 -6.8306E-02 1.8090E-01 -2.9140E-01 3.0743E-01 -2.2410E-01 S10 -5.3333E-02 1.3180E-03 2.0488E-02 -2.4322E-02 1.6185E-02 -7.4235E-03 2.5125E-03 S11 -3.0182E-02 -1.0348E-02 1.1065E-02 -6.3239E-03 2.4615E-03 -7.0153E-04 1.4658E-04 S12 3.9599E-03 -2.1253E-02 1.1025E-02 -3.6233E-03 8.0412E-04 -1.2202E-04 1.2461E-05 S13 -7.7975E-02 1.0651E-02 -6.8546E-04 6.7611E-04 -2.8600E-04 5.9781E-05 -7.7478E-06 S14 -7.6059E-02 1.5485E-02 -2.1698E-03 1.4709E-04 2.4755E-05 -9.5579E-06 1.5308E-06

[0125] Table 8-1

[0126] Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.8894E-04 2.0528E-04 -7.0801E-05 1.3967E-05 -1.1379E-06 0.0000E+00 0.0000E+00 S2 -3.8301E-04 1.9318E-05 1.5718E-05 -2.6462E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.7889E-01 1.1711E-01 -3.1418E-02 4.8718E-03 -3.3226E-04 0.0000E+00 0.0000E+00 S4 -3.5559E+00 2.3813E+00 -1.0942E+00 3.2851E-01 -5.8035E-02 4.5753E-03 0.0000E+00 S5 1.3844E+01 -8.9636E+00 3.9619E+00 -1.1387E+00 1.9171E-01 -1.4335E-02 0.0000E+00 S6 -3.1202E+00 1.9189E+00 -8.4180E-01 2.5678E-01 -5.1711E-02 6.1763E-03 -3.3106E-04 S7 3.0537E-02 -2.2199E-02 9.6903E-03 -2.7242E-03 4.8494E-04 -4.9904E-05 2.2662E-06 S8 -7.9600E-02 3.4091E-02 -1.0359E-02 2.1779E-03 -3.0078E-04 2.4501E-05 -8.9041E-07 S9 1.1591E-01 -4.2896E-02 1.1283E-02 -2.0583E-03 2.4735E-04 -1.7590E-05 5.6014E-07 S10 -6.4813E-04 1.2947E-04 -1.9836E-05 2.2362E-06 -1.7226E-07 7.9957E-09 -1.6728E-10 S11 -2.2095E-05 2.3756E-06 -1.8001E-07 9.3952E-09 -3.2195E-10 6.5342E-12 -5.9656E-14 S12 -7.8476E-07 1.8853E-08 1.3986E-09 -1.5831E-10 7.0894E-12 -1.6146E-13 1.5336E-15 S13 6.8048E-07 -4.1957E-08 1.8275E-09 -5.5256E-11 1.1059E-12 -1.3191E-14 7.1049E-17 S14 -1.5198E-07 1.0145E-08 -4.6469E-10 1.4454E-11 -2.9243E-13 3.4776E-15 -1.8473E-17

[0127] Table 8-2

[0128] Figure 8A The on-axis chromatic aberration curve of the camera lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the camera lens. Figure 8B The astigmatism curve of the camera lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the camera lens in Example 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 8A to 8C It can be seen that the camera lens given in Example 4 can achieve good image quality.

[0129] Example 5

[0130] The following is for reference Figures 9 to 10C A photographic lens according to Embodiment 5 of this application is described. Figure 9 A schematic diagram of the structure of a photographic lens according to Embodiment 5 of this application is shown.

[0131] like Figure 9 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0132] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0133] In this example, the total effective focal length f of the camera lens is 7.22 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.75 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0134] Table 9 shows the basic parameters of the photographic lens of Example 5, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 10-1 and 10-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0135]

[0136]

[0137] Table 9

[0138] Face number A4 A6 A8 A10 A12 A14 A16 S1 9.8127E-04 -9.0649E-03 4.6589E-02 -1.3116E-01 2.3509E-01 -2.8556E-01 2.4303E-01 S2 -8.3311E-03 1.0930E-02 -1.0029E-02 8.1418E-03 -1.7321E-03 -8.3580E-03 1.4435E-02 S3 -1.6941E-02 2.6495E-02 -6.4669E-02 2.1434E-01 -5.1333E-01 8.3603E-01 -9.4481E-01 S4 -8.7852E-03 1.2341E-02 -3.1006E-02 1.9630E-01 -7.1185E-01 1.5961E+00 -2.3982E+00 S5 -1.2638E-02 -5.4790E-02 3.5081E-01 -1.3904E+00 3.6086E+00 -6.4361E+00 8.1169E+00 S6 -3.2582E-02 6.6991E-02 -2.2502E-01 5.3651E-01 -8.9289E-01 1.0571E+00 -9.0153E-01 S7 -3.8297E-02 3.0765E-02 -5.7107E-02 9.1470E-02 -1.0279E-01 8.1501E-02 -4.5995E-02 S8 -2.0908E-02 -1.5789E-02 4.3494E-02 -6.1070E-02 5.5216E-02 -3.3401E-02 1.3474E-02 S9 -2.5885E-02 -6.2282E-03 -2.5831E-04 3.1051E-02 -5.7813E-02 5.6365E-02 -3.5523E-02 S10 -4.4603E-02 -9.1229E-03 2.5577E-02 -2.0086E-02 8.6053E-03 -2.0058E-03 1.1108E-04 S11 -1.7827E-02 -2.3880E-02 2.1139E-02 -1.1703E-02 4.5013E-03 -1.2349E-03 2.4257E-04 S12 1.1129E-02 -2.9569E-02 1.7356E-02 -7.0834E-03 2.1177E-03 -4.6774E-04 7.6450E-05 S13 -9.3516E-02 1.8556E-02 -1.7159E-03 2.9328E-04 -9.7311E-05 2.0231E-05 -2.5977E-06 S14 -9.5379E-02 2.3396E-02 -4.4024E-03 6.5485E-04 -5.9337E-05 -6.6067E-07 1.0639E-06

[0139] Table 10-1

[0140] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.4742E-01 6.4026E-02 -1.9748E-02 4.2214E-03 -5.9439E-04 4.9574E-05 -1.8550E-06 S2 -1.2584E-02 6.9159E-03 -2.5259E-03 6.1397E-04 -9.5633E-05 8.6436E-06 -3.4462E-07 S3 7.5407E-01 -4.2775E-01 1.7134E-01 -4.7354E-02 8.5906E-03 -9.2053E-04 4.4156E-05 S4 2.5143E+00 -1.8688E+00 9.8226E-01 -3.5728E-01 8.5578E-02 -1.2144E-02 7.7338E-04 S5 -7.3469E+00 4.7870E+00 -2.2242E+00 7.1821E-01 -1.5299E-01 1.9309E-02 -1.0922E-03 S6 5.5670E-01 -2.4791E-01 7.8407E-02 -1.7060E-02 2.4050E-03 -1.9499E-04 6.7405E-06 S7 1.8542E-02 -5.3187E-03 1.0709E-03 -1.4712E-04 1.3065E-05 -6.7211E-07 1.5106E-08 S8 -3.4264E-03 4.3072E-04 2.5147E-05 -1.9657E-05 3.3300E-06 -2.6512E-07 8.5107E-09 S9 1.5484E-02 -4.7802E-03 1.0450E-03 -1.5836E-04 1.5821E-05 -9.3648E-07 2.4845E-08 S10 7.9535E-05 -2.7073E-05 4.3119E-06 -3.9260E-07 2.0002E-08 -4.7770E-10 2.4648E-12 S11 -3.4096E-05 3.4215E-06 -2.4283E-07 1.1908E-08 -3.8408E-10 7.3384E-12 -6.2989E-14 S12 -9.2277E-06 8.1681E-07 -5.2212E-08 2.3403E-09 -6.9650E-11 1.2340E-12 -9.8351E-15 S13 2.2235E-07 -1.3184E-08 5.4645E-10 -1.5580E-11 2.9139E-13 -3.2158E-15 1.5835E-17 S14 -1.6255E-07 1.3924E-08 -7.6909E-10 2.8017E-11 -6.5295E-13 8.8459E-15 -5.3075E-17

[0141] Table 10-2

[0142] Figure 10A The on-axis chromatic aberration curve of the camera lens of Embodiment 5 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 10B The astigmatism curve of the camera lens of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C The distortion curve of the camera lens in Example 5 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 10A to 10C It can be seen that the camera lens given in Example 5 can achieve good image quality.

[0143] Example 6

[0144] The following is for reference Figures 11 to 12C A photographic lens according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the structure of a camera lens according to Embodiment 6 of this application is shown.

[0145] like Figure 11 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0146] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is convex. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0147] In this example, the total effective focal length f of the camera lens is 7.22 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.79 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0148] Table 11 shows the basic parameters of the photographic lens of Example 6, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 12-1 and 12-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0149]

[0150]

[0151] Table 11

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S1 5.9690E-04 -6.7267E-03 3.7810E-02 -1.0970E-01 1.9962E-01 -2.4469E-01 2.0951E-01 S2 -7.8337E-03 9.7452E-03 -3.3243E-03 -1.6191E-02 5.2869E-02 -8.8908E-02 9.6005E-02 S3 -1.6250E-02 2.1566E-02 -4.0677E-02 1.3716E-01 -3.4684E-01 5.8713E-01 -6.8079E-01 S4 -9.5143E-03 2.0303E-02 -8.0092E-02 3.7719E-01 -1.1501E+00 2.3266E+00 -3.2564E+00 S5 -1.3192E-02 -4.9654E-02 3.1583E-01 -1.2378E+00 3.1827E+00 -5.6333E+00 7.0577E+00 S6 -3.3635E-02 6.2796E-02 -1.8760E-01 4.0058E-01 -5.9222E-01 6.1163E-01 -4.4021E-01 S7 -4.2498E-02 4.7257E-02 -9.5160E-02 1.4929E-01 -1.6366E-01 1.2718E-01 -7.0806E-02 S8 -2.2072E-02 -7.1272E-03 2.1941E-02 -2.8373E-02 2.1354E-02 -8.4344E-03 8.2137E-05 S9 -1.9472E-02 -2.3579E-02 3.6385E-02 -2.1112E-02 -6.7165E-03 2.0850E-02 -1.7657E-02 S10 -4.3328E-02 -1.3857E-02 3.1288E-02 -2.3950E-02 1.0142E-02 -2.2918E-03 7.1134E-05 S11 -1.8213E-02 -2.5483E-02 2.2733E-02 -1.2563E-02 4.8242E-03 -1.3248E-03 2.6107E-04 S12 1.2148E-02 -3.1132E-02 1.8481E-02 -7.6267E-03 2.3075E-03 -5.1643E-04 8.5577E-05 S13 -9.3992E-02 2.0038E-02 -2.7258E-03 6.4827E-04 -1.7560E-04 3.2000E-05 -3.8556E-06 S14 -9.7454E-02 2.5542E-02 -5.7498E-03 1.1610E-03 -1.8357E-04 2.0424E-05 -1.4870E-06

[0153] Table 12-1

[0154] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.2763E-01 5.5613E-02 -1.7199E-02 3.6852E-03 -5.2004E-04 4.3468E-05 -1.6303E-06 S2 -7.0688E-02 3.6298E-02 -1.3018E-02 3.2003E-03 -5.1437E-04 4.8707E-05 -2.0610E-06 S3 5.5277E-01 -3.1718E-01 1.2800E-01 -3.5538E-02 6.4624E-03 -6.9298E-04 3.3220E-05 S4 3.2324E+00 -2.2958E+00 1.1599E+00 -4.0720E-01 9.4434E-02 -1.3007E-02 8.0578E-04 S5 -6.3499E+00 4.1141E+00 -1.9012E+00 6.1065E-01 -1.2940E-01 1.6245E-02 -9.1402E-04 S6 2.1583E-01 -6.7202E-02 1.0208E-02 8.1724E-04 -6.8732E-04 1.2228E-04 -7.8789E-06 S7 2.8368E-02 -8.1522E-03 1.6590E-03 -2.3266E-04 2.1327E-05 -1.1475E-06 2.7416E-08 S8 1.8501E-03 -1.0947E-03 3.4454E-04 -6.6715E-05 7.9485E-06 -5.3574E-07 1.5662E-08 S9 8.9188E-03 -3.0192E-03 7.0444E-04 -1.1216E-04 1.1654E-05 -7.1208E-07 1.9391E-08 S10 1.2253E-04 -4.0985E-05 6.9738E-06 -7.1920E-07 4.5268E-08 -1.6019E-09 2.4415E-11 S11 -3.6858E-05 3.7161E-06 -2.6495E-07 1.3046E-08 -4.2225E-10 8.0892E-12 -6.9554E-14 S12 -1.0467E-05 9.3774E-07 -6.0572E-08 2.7392E-09 -8.2125E-11 1.4641E-12 -1.1731E-14 S13 3.1993E-07 -1.8712E-08 7.7341E-10 -2.2169E-11 4.1987E-13 -4.7286E-15 2.3974E-17 S14 6.0469E-08 -1.8962E-10 -1.2942E-10 7.7886E-12 -2.2933E-13 3.5688E-15 -2.3480E-17

[0155] Table 12-2

[0156] Figure 12A The on-axis chromatic aberration curve of the camera lens of Embodiment 6 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 12B The astigmatism curve of the camera lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the camera lens in Example 6 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 12A to 12C It can be seen that the camera lens given in Example 6 can achieve good image quality.

[0157] Example 7

[0158] The following is for reference Figures 13 to 14C A photographic lens according to Embodiment 7 of this application is described. Figure 13 A schematic diagram of the structure of a camera lens according to Embodiment 7 of this application is shown.

[0159] like Figure 13 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

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

[0161] In this example, the total effective focal length f of the camera lens is 7.19 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.75 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 6.43 mm.

[0162] Table 13 shows the basic parameters of the photographic lens of Example 7, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 14-1 and 14-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0163]

[0164]

[0165] Table 13

[0166] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.7228E-04 -4.6672E-03 2.9880E-02 -9.1161E-02 1.7221E-01 -2.1812E-01 1.9241E-01 S2 -8.0038E-03 1.1231E-02 -1.7841E-02 4.1262E-02 -7.8711E-02 1.0631E-01 -1.0183E-01 S3 -1.7299E-02 3.4863E-02 -1.1707E-01 3.8753E-01 -8.7669E-01 1.3548E+00 -1.4673E+00 S4 -5.8029E-03 -1.8418E-02 1.6886E-01 -6.3019E-01 1.5501E+00 -2.6719E+00 3.3070E+00 S5 -1.2096E-02 -4.2917E-02 2.6312E-01 -1.0693E+00 2.8668E+00 -5.2920E+00 6.9173E+00 S6 -1.9510E-02 2.1913E-02 -7.7498E-02 1.7835E-01 -2.6975E-01 2.7009E-01 -1.7212E-01 S7 -2.6701E-02 -3.5410E-04 1.8649E-02 -3.2512E-02 3.4780E-02 -2.5533E-02 1.3669E-02 S8 -2.8629E-02 7.1875E-03 -5.1573E-03 1.2740E-02 -2.3423E-02 2.5857E-02 -1.8503E-02 S9 -4.1121E-02 2.3370E-02 -4.5838E-02 8.2962E-02 -1.0103E-01 8.2752E-02 -4.7401E-02 S10 -5.4780E-02 9.7830E-03 2.3932E-03 5.8642E-05 -4.0353E-03 3.7675E-03 -1.8165E-03 S11 -1.9862E-02 -2.0281E-02 1.8088E-02 -1.0066E-02 3.9074E-03 -1.0856E-03 2.1616E-04 S12 1.0657E-02 -2.8705E-02 1.6728E-02 -6.8301E-03 2.0581E-03 -4.6082E-04 7.6629E-05 S13 -9.2316E-02 1.8362E-02 -1.8310E-03 3.4746E-04 -1.0783E-04 2.1349E-05 -2.6578E-06 S14 -9.5168E-02 2.3940E-02 -4.7788E-03 7.9384E-04 -9.5658E-05 6.3031E-06 9.4248E-08

[0167] Table 14-1

[0168] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.2046E-01 5.3817E-02 -1.7031E-02 3.7277E-03 -5.3651E-04 4.5676E-05 -1.7427E-06 S2 6.9988E-02 -3.4610E-02 1.2196E-02 -2.9850E-03 4.8177E-04 -4.6078E-05 1.9773E-06 S3 1.1322E+00 -6.2531E-01 2.4529E-01 -6.6701E-02 1.1951E-02 -1.2687E-03 6.0449E-05 S4 -2.9677E+00 1.9288E+00 -8.9664E-01 2.8996E-01 -6.1830E-02 7.7999E-03 -4.4007E-04 S5 -6.4988E+00 4.4021E+00 -2.1298E+00 7.1746E-01 -1.5976E-01 2.1127E-02 -1.2555E-03 S6 5.8524E-02 1.8239E-03 -1.2195E-02 6.0514E-03 -1.5214E-03 2.0348E-04 -1.1521E-05 S7 -5.5435E-03 1.7290E-03 -4.0872E-04 7.0103E-05 -8.1180E-06 5.6162E-07 -1.7408E-08 S8 9.0255E-03 -3.0670E-03 7.2617E-04 -1.1731E-04 1.2307E-05 -7.5444E-07 2.0485E-08 S9 1.9434E-02 -5.7458E-03 1.2161E-03 -1.7971E-04 1.7598E-05 -1.0249E-06 2.6833E-08 S10 5.4991E-04 -1.1042E-04 1.4873E-05 -1.3222E-06 7.3847E-08 -2.3189E-09 3.0556E-11 S11 -3.0780E-05 3.1257E-06 -2.2432E-07 1.1118E-08 -3.6242E-10 6.9991E-12 -6.0743E-14 S12 -9.4238E-06 8.4970E-07 -5.5251E-08 2.5142E-09 -7.5790E-11 1.3570E-12 -1.0907E-14 S13 2.2228E-07 -1.2928E-08 5.2686E-10 -1.4799E-11 2.7322E-13 -2.9835E-15 1.4580E-17 S14 -6.5391E-08 6.9660E-09 -4.1732E-10 1.5771E-11 -3.7384E-13 5.0983E-15 -3.0605E-17

[0169] Table 14-2

[0170] Figure 14A The on-axis chromatic aberration curve of the camera lens of Embodiment 7 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 14B The astigmatism curve of the camera lens of Embodiment 7 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C The distortion curve of the camera lens in Example 7 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 14A to 14C It can be seen that the camera lens given in Example 7 can achieve good image quality.

[0171] Example 8

[0172] The following is for reference Figures 15 to 16C A photographic lens according to Embodiment 8 of this application is described. Figure 15 A schematic diagram of the structure of a camera lens according to Embodiment 8 of this application is shown.

[0173] like Figure 15 As shown, the camera lens, from the object side to the image side, includes, in sequence: aperture STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter E8, and imaging plane S17.

[0174] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. The imaging surface S17 of the photographic lens is concave. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0175] In this example, the total effective focal length f of the camera lens is 6.21 mm, the distance TD on the optical axis from the object side S1 of the first lens E1 to the image side S14 of the seventh lens E7 is 6.36 mm, and half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the camera lens is 5.80 mm.

[0176] Table 15 shows the basic parameters of the photographic lens of Example 8, wherein the units of radius of curvature, thickness / distance and focal length are millimeters (mm). Tables 16-1 and 16-2 show the higher-order coefficients that can be used for each aspherical mirror in Example 8, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0177]

[0178]

[0179] Table 15

[0180] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.2223E-03 -2.0773E-04 1.8753E-03 -3.6392E-03 4.0146E-03 -2.6081E-03 9.7839E-04 S2 -5.3565E-04 1.0625E-02 -1.3250E-02 1.3258E-02 -1.0252E-02 5.0504E-03 -1.3240E-03 S3 -1.0480E-02 1.8333E-02 -2.2310E-02 3.2147E-02 -3.7133E-02 2.9478E-02 -1.5098E-02 S4 -8.6064E-03 1.0996E-02 -7.3858E-03 1.0443E-02 -1.0989E-02 7.9706E-03 -3.3743E-03 S5 -5.5313E-03 9.2922E-03 -1.7015E-02 3.1168E-02 -3.2709E-02 2.1466E-02 -8.4399E-03 S6 -8.3971E-03 4.4575E-03 3.6576E-03 -1.4628E-02 2.4036E-02 -2.0697E-02 1.0025E-02 S7 -4.2191E-02 1.5373E-02 -3.1732E-02 3.8867E-02 -3.3094E-02 1.8552E-02 -6.5195E-03 S8 -4.3936E-02 2.7577E-02 -4.0454E-02 3.9480E-02 -2.6075E-02 1.0984E-02 -2.7165E-03 S9 -6.3416E-02 3.2981E-02 -5.5484E-03 -4.1072E-02 7.8002E-02 -7.9355E-02 5.1626E-02 S10 -7.8582E-02 4.2863E-02 -2.5759E-02 1.1619E-02 -2.8327E-03 -2.9986E-04 5.2893E-04 S11 -3.5845E-02 3.2326E-03 5.7533E-03 -8.0723E-03 5.1467E-03 -2.0720E-03 5.7108E-04 S12 -4.1941E-03 -4.9886E-03 7.2102E-03 -5.9227E-03 2.7040E-03 -7.8342E-04 1.5189E-04 S13 -1.0860E-01 4.2902E-02 -9.8545E-03 5.0986E-04 3.7332E-04 -1.1960E-04 1.8965E-05 S14 -1.1549E-01 4.8941E-02 -1.6242E-02 4.0773E-03 -7.9268E-04 1.2025E-04 -1.4026E-05

[0181] Table 16-1

[0182] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.9710E-04 1.6062E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.2369E-04 5.3345E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.8119E-03 -8.7623E-04 7.0529E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 7.5081E-04 -6.5054E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.8014E-03 -1.5842E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.5961E-03 2.7799E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.2678E-03 -1.0342E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 3.2524E-04 -8.6696E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -2.2228E-02 6.2330E-03 -1.0598E-03 8.7146E-05 3.2879E-07 -4.0596E-07 0.0000E+00 S10 -2.0478E-04 4.2613E-05 -5.0014E-06 2.8610E-07 -2.5412E-09 -3.1295E-10 0.0000E+00 S11 -1.1107E-04 1.5386E-05 -1.5087E-06 1.0232E-07 -4.5667E-09 1.2078E-10 -1.4359E-12 S12 -1.9969E-05 1.7592E-06 -9.9162E-08 3.1219E-09 -2.5951E-11 -1.3600E-12 3.2027E-14 S13 -1.9191E-06 1.3281E-07 -6.4011E-09 2.1239E-10 -4.6412E-12 6.0278E-14 -3.5310E-16 S14 1.2314E-06 -7.9720E-08 3.7218E-09 -1.2135E-10 2.6154E-12 -3.3431E-14 1.9172E-16

[0183] Table 16-2

[0184] Figure 16A The on-axis chromatic aberration curve of the camera lens of Embodiment 8 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 16B The astigmatism curve of the camera lens of Embodiment 8 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C The distortion curve of the camera lens in Example 8 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 16A to 16C It can be seen that the camera lens given in Example 8 can achieve good image quality.

[0185] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0186] Conditional / Example 1 2 3 4 5 6 7 8 TD / ImgH 1.00 1.05 1.05 0.99 1.05 1.06 1.05 1.10 f6 / f-f7 / f 2.44 2.35 2.33 2.47 2.36 2.27 2.36 2.26 Fno 1.89 1.90 1.90 1.93 1.90 1.90 1.90 1.89 (R7-R8) / (R7+R8) -0.69 0.11 0.20 -0.76 -0.06 -0.16 0.19 0.81 R10 / T56 25.88 16.64 16.75 28.03 18.31 17.95 16.49 22.89 V3 / N3 12.28 11.49 12.28 11.49 12.28 12.28 12.28 36.33 (V2+V3) / (V6+V7) 0.20 0.03 0.20 0.03 0.20 0.20 0.20 0.52 f56 / (CT5+CT6) 8.92 10.93 10.98 9.23 10.51 16.10 9.11 10.15 |SAG51 / CT5| 1.29 1.76 1.79 1.44 1.68 1.86 1.52 0.92 ∑CT / TD 0.58 0.55 0.54 0.58 0.55 0.56 0.54 0.57

[0187] Table 17

[0188] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the photographic lens described above.

[0189] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A photographic lens characterized in that, In order from the object side to the image side along the optical axis, the photographic lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the object side surface of the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens is a convex surface, and the image side surface is a concave surface; the object side surface of the seventh lens is a concave surface, and the image side surface is a concave surface; The first lens and the sixth lens both have positive refractive power, and the second lens and the seventh lens both have negative refractive power; The photographic lens satisfies 0.99≤TD / ImgH≤1.1, 8.92≤f56 / (CT5+CT6)≤16.10 and 16.49≤R10 / T56≤28.03, wherein ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the photographic lens, TD is the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, f56 is the combined focal length of the fifth lens and the sixth lens, 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, T56 is the air gap of the fifth lens and the sixth lens on the optical axis, and R10 is the radius of curvature of the image side surface of the fifth lens; At least one of the lens surfaces from the object side surface of the first lens to the image side surface of the seventh lens is an aspheric lens surface; and The number of lenses with refractive power in the photographic lens is seven.

2. The photographic lens of claim 1, wherein, The photographic lens satisfies 2.26≤f6 / f-f7 / f≤2.47, wherein f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the total effective focal length of the photographic lens.

3. The photographic lens of claim 1, wherein, The photographic lens satisfies -0.76≤(R7-R8) / (R7+R8)≤0.81 and 0.3413mm≤CT4≤0.4502mm, wherein R7 is the radius of curvature of the object side surface of the fourth lens, R8 is the radius of curvature of the image side surface of the fourth lens, and CT4 is the central thickness of the fourth lens on the optical axis.

4. The photographic lens of claim 1, wherein, The photographic lens satisfies 11.49≤V3 / N3≤36.33, wherein N3 is the refractive index of the third lens, and V3 is the dispersion coefficient of the third lens.

5. The photographic lens of claim 1, wherein, The photographic lens satisfies 0.3<(V2+V3) / (V6+V7)≤0.52, (V2+V3) / (V6+V7)=0.03 or (V2+V3) / (V6+V7)=0.20, wherein V2 is the dispersion coefficient of the second lens, V3 is the dispersion coefficient of the third lens, V6 is the dispersion coefficient of the sixth lens, and V7 is the dispersion coefficient of the seventh lens.

6. The photographic lens of claim 1, wherein, The photographic lens satisfies 0.92≤|SAG51 / CT5|≤1.86, wherein SAG51 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis.

7. The photographic lens of any of claims 1-6, wherein, The imaging surface of the photographic lens is a curved surface.

8. The photographic lens of any of claims 1-6, wherein, The photographic lens satisfies: 0.5 < ∑CT / TD ≤ 0.58, wherein ∑CT is the sum of the center thicknesses of the first lens to the seventh lens on the optical axis, and TD is the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis.

9. The photographic lens of any of claims 1-6, wherein, The photographic lens satisfies: 1.89 ≤ Fno < 2.0, wherein Fno is the aperture value of the photographic lens.

10. A photographic lens characterized in that, The first lens, the second lens, the fourth lens, the fifth lens, the sixth lens have convex object side surfaces and concave image side surfaces, and the seventh lens has a concave object side surface and a concave image side surface. The first lens and the sixth lens have positive refractive powers, and the second lens and the seventh lens have negative refractive powers. The photographic lens satisfies: 0.5 < ∑CT / TD ≤ 0.58, 8.92 ≤ f56 / (CT5+CT6) ≤ 16.10, and 16.49 ≤ R10 / T56 ≤ 28.03, wherein ∑CT is the sum of the center thicknesses of the first lens to the seventh lens on the optical axis, TD is the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, f56 is the combined focal length of the fifth lens and the sixth lens, CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, T56 is the air gap of the fifth lens and the sixth lens on the optical axis, and R10 is the curvature radius of the image side surface of the fifth lens. At least one of the lens surfaces from the object side surface of the first lens to the image side surface of the seventh lens is a non-spherical lens surface. The number of lenses with refractive power in the photographic lens is seven.

11. The photographic lens of claim 10, wherein, The photographic lens satisfies: 2.26 ≤ f6 / f-f7 / f ≤ 2.47, wherein f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the total effective focal length of the photographic lens.

12. The photographic lens of claim 10, wherein, The photographic lens satisfies: -0.76 ≤ (R7-R8) / (R7+R8) ≤ 0.81 and 0.3413 mm ≤ CT4 ≤ 0.4502 mm, wherein R7 is the curvature radius of the object side surface of the fourth lens, R8 is the curvature radius of the image side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

13. The photographic lens of claim 10, wherein, The photographic lens satisfies: 11.49 ≤ V3 / N3 ≤ 36.33, wherein N3 is the refractive index of the third lens, and V3 is the dispersion coefficient of the third lens.

14. The photographic lens of claim 10, wherein, The photographic lens satisfies: 0.3 < (V2+V3) / (V6+V7) ≤ 0.52 or (V2+V3) / (V6+V7) = 0.03 or (V2+V3) / (V6+V7) = 0.20, wherein V2 is a dispersion coefficient of the second lens, V3 is a dispersion coefficient of the third lens, V6 is a dispersion coefficient of the sixth lens, and V7 is a dispersion coefficient of the seventh lens.

15. The photographic lens of claim 10, wherein, The photographic lens satisfies: 0.92 ≤ |SAG51 / CT5| ≤ 1.86, wherein SAG51 is a distance from an intersection of an object side surface of the fifth lens and the optical axis to an effective radius vertex point of the object side surface of the fifth lens on the optical axis, and CT5 is a central thickness of the fifth lens on the optical axis.

16. The photographic lens of any of claims 10-15, wherein, An imaging surface of the photographic lens is a curved surface.

17. The photographic lens of any of claims 10-15, wherein, The photographic lens satisfies: 1.89 ≤ Fno < 2.0, wherein Fno is an aperture value of the photographic lens.

Images