Camera lens

Abstract

The present application discloses a camera lens, which comprises, in order from the object side to the image side along the optical axis: a first lens, the curvature radius of the object side and the image side of which are opposite in sign; a second lens with negative optical power; a third lens with positive optical power; a fourth lens; a fifth lens; a sixth lens with positive optical power; and a seventh lens with negative optical power; and the camera lens meets: -350mm <R8<‑50mm;20°<Semi‑FOV<35°;CT6 / CT3> 1.0; and ‑50

Description

Technical Field

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

[0002] In recent years, with the booming development of the smartphone field, mobile phones have become a quasi-necessity for people's communication, entertainment, and life. The imaging capabilities of mobile phones have become the focus of people's attention. People have put forward more new requirements for the shooting effects of mobile phones and the types and specifications of mobile phone lenses. Especially in the main camera lenses of high-end flagship mobile phones, there is an increasingly obvious trend towards large image planes, large apertures, high performance, and long focal lengths. A large image plane means higher pixels, a large aperture represents more light input, a more vivid picture, and better night scene performance. A long focal length means that farther objects can be photographed, and there is also a better portrait effect. The changes in these main parameters have greatly improved the imaging capabilities and competitive advantages of mobile phone lenses, and at the same time have also posed higher challenges to the design of optical systems. Traditional low-piece-number lenses are already difficult to meet these requirements, and seven-piece optical imaging lenses will gradually become the mainstream.

[0003] The focal length of a lens determines the distance of the photographed object. The method of digitally magnifying a common short focal length lens to photograph distant objects will make the picture show more noise and smear. A long focal length lens can clearly image farther objects and still keep the picture clear under digital magnification. At the same time, a long focal length lens with a large aperture has a small depth of field and a vivid picture, and can better achieve background blurring when shooting portraits and landscape close-ups, highlighting the details and characteristics of things.

[0004] Therefore, in order to meet the application requirements of the main camera lens on the next generation of high-end smartphones, it is of great practical significance to design a seven-piece optical imaging lens with a large image plane, a large aperture, and a long focal length. [[ID=!15]] Summary of the Invention

[0005] This application provides such a camera lens. The camera lens sequentially includes, from the object side to the image side along the optical axis: a first lens, the signs of the curvature radii of its object side surface and image side surface are opposite; a second lens with a negative optical power; a third lens with a positive optical power; a fourth lens; a fifth lens; a sixth lens with a positive optical power; and a seventh lens with a negative optical power; and the camera lens satisfies: -350mm < R8 < -50mm; 20° < Semi-FOV < 35°; CT6 / CT3 > 1.0; and -50 < R8 / f < -4; where R8 is the curvature radius of the image side surface of the fourth lens, Semi-FOV is the maximum semi-field angle of the camera lens, CT6 is the central thickness of the sixth lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and f is the effective focal length of the camera lens.

[0006] In one embodiment, the entrance pupil diameter EPD of the camera lens and the effective focal length f of the camera lens satisfy: f / EPD < 2.

[0007] In one embodiment, the first lens has a positive optical power and satisfies: -1mm < f1 / R2×R1 < 0, where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

[0008] In one embodiment, the signs of the curvature radii of the object side surface and the image side surface of the second lens are both positive, and satisfy: -4 < (R3 + R4) / (f2 - f) < -0.7, where f is the effective focal length of the camera lens, f2 is the effective focal length of the second lens, R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens.

[0009] In one embodiment, the air gap T23 between the second lens and the third lens on the optical axis and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1 < T34 / T23 < 4.

[0010] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the curvature radius R1 of the object side surface of the first lens satisfy: 1.95 ≤ R1 / CT1 < 2.5.

[0011] In one embodiment, the 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 satisfy: 0 < f / (f6 + f7) < 2.5.

[0012] In one embodiment, the air gap T67 between the sixth lens and the seventh lens on the optical axis and the axial distance BFL from the image side surface of the seventh lens to the imaging surface of the camera lens satisfy: 1 < T67 / BFL < 3.

[0013] In one embodiment, the curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 0 < (R5 + R6) / f3 < 1.

[0014] In one embodiment, the central thickness CT1 of the first lens on the optical axis, the edge thickness ET1 of the first lens, the central thickness CT2 of the second lens on the optical axis, and the edge thickness ET2 of the second lens satisfy: 0.5 < ET2 / CT2 - ET1 / CT1 < 1.5.

[0015] In one embodiment, the edge thickness ET6 of the first lens and the edge thickness ET7 of the third lens satisfy: 1 < ET7 / ET6 < 2.7.

[0016] In one embodiment, a curvature radius R11 of the object-side surface of the sixth lens, a curvature radius R12 of the image-side surface of the sixth lens, a curvature radius R13 of the object-side surface of the seventh lens, and a curvature radius R14 of the image-side surface of the seventh lens satisfy the following relationship: 0<|R12-R11| / |R14-R13|<3.5.

[0017] In one embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, an air gap T34 between the third lens and the fourth lens on the optical axis, and an air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 1<(CT3+CT4+CT5) / (T34+T45)<2.8.

[0018] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: |f1|<|f2|<|f3|.

[0019] In one embodiment, at least three lenses from the first to seventh lenses have an Abbe number greater than 50.

[0020] In one embodiment, the effective radius DT42 of the image side surface of the fourth lens, the effective radius DT51 of the object side surface of the fifth lens, the effective radius DT52 of the image side surface of the fifth lens, and the effective radius DT61 of the object side surface of the sixth lens satisfy: 0.4<(DT42+DT51) / (DT52+DT61)<1.

[0021] The seven-element camera lens proposed in this application has the characteristics of a large image surface, a large aperture, and a long focal length. By reasonably matching the optical power and surface shape of some lenses, and controlling the center thickness of the third lens and the sixth lens, the curvature radius of the fourth lens, the maximum half field of view angle, and the effective focal length of the camera lens, the thickness and spacing distribution of the third lens and the sixth lens can be made more reasonable, which is conducive to balancing aberrations, improving the lens resolution, and helping to improve the stability of the lens assembly. It can better realize the long focal length design while maintaining a large field of view angle to ensure the shooting range of the picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 1 shows a schematic structural diagram of a camera lens according to Example 1 of the present application;

[0024] Figures 2A to 2D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 1 are respectively shown;

[0025] Figure 3 Schematic diagram of the structure of a camera lens according to embodiment 2 of the present application is shown;

[0026] Figures 4A to 4D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 2 are respectively shown;

[0027] Figure 5 1 shows a schematic structural diagram of a camera lens according to Example 3 of the present application;

[0028] 6A to 6D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 3 are shown respectively;

[0029] Figure 7 1 shows a schematic structural diagram of a camera lens according to Example 4 of the present application;

[0030] Figures 8A to 8D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 4 are respectively shown;

[0031] Figure 9 1 shows a schematic structural diagram of a camera lens according to Example 5 of the present application;

[0032] 10A to 10D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 5 are shown respectively;

[0033] Figure 11 A schematic structural diagram of a camera lens according to embodiment 6 of the present application is shown; and

[0034] 12A to 12D The longitudinal chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the imaging lens of Example 6 are shown respectively. DETAILED DESCRIPTION

[0035] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to 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.

[0036] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0037] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0038] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, 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.

[0039] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The features, principles and other aspects of the present application are described in detail below.

[0043] The camera lens according to an exemplary embodiment of the present application may include seven lenses with optical powers, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in sequence from the object side to the image side along the optical axis. There may be a spacing distance between any two adjacent lenses among the first lens to the seventh lens. In the exemplary embodiment, the signs of the radii of curvature of the object side and the image side of the first lens are opposite, the second lens has a negative optical power, the third lens has a positive optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power.

[0044] In the exemplary embodiment, the radius of curvature R8 of the image side of the fourth lens satisfies: -350 mm < R8 < -50 mm.

[0045] In the exemplary embodiment, the maximum semi-field angle Semi-FOV of the camera lens satisfies: 20° < Semi-FOV < 35°.

[0046] In the exemplary embodiment, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: CT6 / CT3 > 1.0. <00,00,121>In the exemplary embodiment, the radius of curvature R8 of the image side of the fourth lens and the effective focal length f of the camera lens satisfy: -50 < R8 / f < -4.

[0048] The camera lens according to an exemplary embodiment of the present application may include seven lenses with optical powers, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the signs of the radii of curvature of the object side and the image side of the first lens are opposite, the second lens has a negative optical power, the third lens has a positive optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power. It is set that the radius of curvature R8 of the image side of the fourth lens, the maximum semi-field angle Semi-FOV of the camera lens, the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the effective focal length f of the camera lens satisfy: -350 mm < R8 < -50 mm; 20° < Semi-FOV < 35°; CT6 / CT3 > 1.0; and -50 < R8 / f < -4. By reasonably matching the optical powers and surface shapes of some lenses, and controlling the central thicknesses of the third lens and the sixth lens with positive optical powers, the radius of curvature of the fourth lens, the maximum semi-field angle of the camera lens, and the effective focal length, the thicknesses and spacings of the third lens and the sixth lens can be distributed more reasonably, which is beneficial to balancing aberrations, improving the lens resolution, and also helps to improve the stability of lens assembly. It can better achieve the long focal length design, while maintaining a large field angle and ensuring the picture shooting and viewing range.

[0049] In an exemplary embodiment, the first lens may have a positive optical power, the second lens may have a negative optical power, the third lens may have a positive optical power, the fourth lens may have a positive or negative optical power, the fifth lens may have a positive or negative optical power, the sixth lens may have a positive optical power, and the seventh lens may have a negative optical power. Such a setting can make the optical power distribution of the lens more reasonable, effectively balance the aberration, and improve the resolution of the lens.

[0050] In an exemplary embodiment, the imaging lens according to the exemplary embodiment of the present application further includes an aperture disposed on the object side surface of the first lens.

[0051] In an exemplary embodiment, the imaging lens according to the present application may satisfy: f / EPD < 2, where EPD is the entrance pupil diameter of the imaging lens and f is the effective focal length of the imaging lens. Satisfying f / EPD < 2 and reasonably controlling the focal length of the lens and the aperture of the lens can endow the lens with the characteristics of both long focal length and large aperture, which is beneficial to obtaining a large amount of incident light, ensuring good imaging illuminance during the recognition process, and being able to better meet the shooting requirements in case of insufficient light such as cloudy days and dusk, and is beneficial to improving the resolution of the system.

[0052] In an exemplary embodiment, the first lens has a positive optical power and satisfies: -1mm < f1 / R2×R1 < 0, where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, and R2 is the curvature radius of the image side surface of the first lens. Reasonably matching the optical power and surface shape of the first lens is beneficial to correcting the paraxial aberration and improving the resolution of the central field of view.

[0053] In an exemplary embodiment, the signs of the curvature radii of the object side surface and the image side surface of the second lens of the imaging lens according to the present application are both positive and satisfy: -4 < (R3 + R4) / (f2 - f) < -0.7, where f is the effective focal length of the imaging lens, f2 is the effective focal length of the second lens, R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens. The second lens has a positive optical power, enabling the system to have a stronger light control ability. Reasonably controlling the curvature radius of the second lens can better correct the off-axis aberration and improve the resolution.

[0054] In an exemplary embodiment, the camera lens according to the present application may satisfy: 1 < T34 / T23 < 4, where T23 is the air gap between the second lens and the third lens on the optical axis, and T34 is the air gap between the third lens and the fourth lens on the optical axis. Satisfying 1 < T34 / T23 < 4 and reasonably distributing the air gap between the second lens and the third lens on the optical axis, as well as the air gap between the third lens and the fourth lens on the optical axis, can enable the structural part at the edge bearing of the third lens and the fourth lens to obtain sufficient space, meet the assembly process error, improve the assembly stability and mass production performance.

[0055] In an exemplary embodiment, the camera lens according to the present application may satisfy: 1.95 ≤ R1 / CT1 < 2.5, where CT1 is the central thickness of the first lens on the optical axis, and R1 is the curvature radius of the object side surface of the first lens. Satisfying 1.95 ≤ R1 / CT1 < 2.5 and reasonably controlling the central thickness and shape of the first lens can improve the field curvature and distortion of the outer field of view, enhance the resolution, and at the same time reduce the lens forming difficulty.

[0056] In an exemplary embodiment, the camera lens according to the present application may satisfy: 0 < f / (f6 + f7) < 2.5, where f is the 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. Satisfying 0 < f / (f6 + f7) < 2.5 and reasonably controlling the effective focal lengths of the sixth lens and the seventh lens is beneficial to adjusting the optical back focal length and CRA, and can shorten the total length of the camera lens.

[0057] In an exemplary embodiment, the camera lens according to the present application may satisfy: 1 < T67 / BFL < 3, where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, and BFL is the axial distance from the image side surface of the seventh lens to the imaging surface of the camera lens. Satisfying 1 < T67 / BFL < 3 and reasonably distributing the air gap between the sixth lens and the seventh lens on the optical axis can effectively control the rear end size of the camera lens and reduce the volume of the lens group.

[0058] In an exemplary embodiment, the camera lens according to the present application may satisfy: 0 < (R5 + R6) / f3 < 1, where R5 is the curvature radius of the object side surface of the third lens, R6 is the curvature radius of the image side surface of the third lens, and f3 is the effective focal length of the third lens. Satisfying 0 < (R5 + R6) / f3 < 1 and reasonably controlling the shape and optical power of the third lens can reduce the system performance sensitivity, while ensuring the lens processing performance and assembly stability, and improving the assembly yield.

[0059] In an exemplary embodiment, the camera lens according to the present application can satisfy: 0.5 < ET2 / CT2 - ET1 / CT1 < 1.5, where CT1 is the central thickness of the first lens on the optical axis, ET1 is the edge thickness of the first lens, CT2 is the central thickness of the second lens on the optical axis, and ET2 is the edge thickness of the second lens. Satisfying 0.5 < ET2 / CT2 - ET1 / CT1 < 1.5 can reasonably constrain the central thickness and shape of the first lens and the second lens, improve the intensity of large-angle reflected ghost images, ensure the lens processing performance, and reduce the system sensitivity.

[0060] In an exemplary embodiment, the camera lens according to the present application can satisfy: 1 < ET7 / ET6 < 2.7, where ET6 is the edge thickness of the first lens and ET7 is the edge thickness of the third lens. Satisfying 1 < ET7 / ET6 < 2.7 can reasonably constrain the edge aperture size and shape of the first lens and the third lens, which is beneficial to achieving a large aperture design, adjusting the system vignetting, correcting the edge field distortion, and improving the edge field resolution and illuminance.

[0061] In an exemplary embodiment, the camera lens according to the present application can satisfy: 0 < ∣R12 - R11∣ / ∣R14 - R13∣ < 3.5, where R11 is the curvature radius of the object side of the sixth lens, R12 is the curvature radius of the image side of the sixth lens, R13 is the curvature radius of the object side of the seventh lens, and R14 is the curvature radius of the image side of the seventh lens. Satisfying 0 < ∣R12 - R11∣ / ∣R14 - R13∣ < 3.5 can reasonably control the shapes of the last two lenses, more freely adjust the exit angle of the chief ray from the exit pupil, better match the chip CRA, correct the field curvature, and improve the resolution.

[0062] In an exemplary embodiment, the camera lens according to the present application can satisfy: 1 < (CT3 + CT4 + CT5) / (T34 + T^45) < 2.8, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, T34 is the air gap between the third lens and the fourth lens on the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis. Satisfying 1 < (CT3 + CT4 + CT5) / (T34 + T45) < 2.8 can reasonably match the central thickness and air gap of the third lens, the fourth lens, and the fifth lens, improve the structural strength of the system, ensure the minimum bearing contact distance of the third lens, the fourth lens, and the fifth lens, enhance the assembly stability, and avoid interference between the spacer and the lens.

[0063] In an exemplary embodiment, the camera lens according to the present application may satisfy the following: |f1|<|f2|<|f3|, where f1 is the effective focal length of the first lens element, f2 is the effective focal length of the second lens element, and f3 is the effective focal length of the third lens element. Satisfying |f1|<|f2|<|f3| allows for proper control of the focal power of the first three lenses, facilitates correction of paraxial aberrations, effectively reduces system optical sensitivity, and improves actual assembly yield.

[0064] In an exemplary embodiment, at least three of the first to seventh lenses have an Abbe number greater than 50. Lenses with high Abbe numbers have smaller dispersion capabilities. Reasonable matching of lens materials can better correct system chromatic aberration and improve resolution.

[0065] In an exemplary embodiment, the camera lens according to the present application may satisfy the following conditions: 0.4 < (DT42 + DT51) / (DT52 + DT61) < 1, where DT42 is the effective radius of the image side surface of the fourth lens, DT51 is the effective radius of the object side surface of the fifth lens, DT52 is the effective radius of the image side surface of the fifth lens, and DT61 is the effective radius of the object side surface of the sixth lens. Satisfying 0.4 < (DT42 + DT51) / (DT52 + DT61) < 1 and rationally controlling the effective radii of the image side surfaces of the fourth and fifth lenses and the effective radii of the object side surfaces of the fifth and sixth lenses can effectively increase the relative illumination of the peripheral field of view, avoid module vignetting, and ensure that the system still has good imaging quality in low-light environments.

[0066] In an exemplary embodiment, at least one of the mirror surfaces of each lens from the first lens to the seventh lens is an aspherical mirror surface. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. If the focus is on the resolution quality, all lenses can use aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. The characteristic of a spherical lens is that there is a constant curvature from the center of the lens to the periphery. Aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side and image side of each lens from the first lens to the seventh lens are aspherical mirror surfaces.

[0067] In an exemplary embodiment, the effective focal length f of the camera lens may be, for example, in the range of 7.3 mm to 8.9 mm, the effective focal length f1 of the first lens may be, for example, in the range of 5.6 mm to 6.5 mm, the effective focal length f2 of the second lens may be, for example, in the range of -11.1 mm to -10.0 mm, the effective focal length f3 of the third lens may be, for example, in the range of 29.3 mm to 300.1 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of -211.0 mm to 148.0 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of -217.0 mm to 41.0 mm, the effective focal length f6 of the sixth lens may be, for example, in the range of 11.5 mm to 45.0 mm, and the effective focal length f7 of the seventh lens may be, for example, in the range of -15.1 mm to -5.9 mm. 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 8.9 mm < TTL < 10.4 mm. The maximum semi-field angle Semi-FOV of the camera lens may be, for example, in the range of 25.4° to 32.6°. Half of the image height ImgH corresponding to the maximum field angle of the camera lens may be, for example, in the range of 4.0 mm to 5.2 mm. The f-number Fno of the camera lens may be, for example, in the range of 1.6 to 1.9.

[0068] In an exemplary embodiment, the camera lens according to the present application further includes a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0069] The present application proposes a camera lens having characteristics such as a large image plane, high pixels, miniaturization, and high imaging quality. The camera lens according to the above-described embodiment of the present application may employ multiple lenses, such as the seven lenses described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the incident light can be effectively converged, the optical total length of the camera lens can be reduced, and the processability of the camera lens can be improved, making the camera lens more conducive to production and processing. However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the camera lens 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.

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

[0071] Example 1

[0072] The following refers to Figures 1 to 2DThe imaging lens according to the first embodiment of the present application will be described. Figure 1 A schematic structural diagram of a camera lens according to embodiment 1 of the present application is shown.

[0073] like Figure 1 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens element E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. Seventh lens element E7 has negative refractive power, with a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0074] Table 1 shows basic parameters of the camera lens of Example 1, wherein the units of curvature radius, thickness / distance and effective focal length are all millimeters (mm).

[0075]

[0076]

[0077] Table 1

[0078] In Example 1, the object-side surface and the image-side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0079]

[0080] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A 10 、A 12 、A 14 、A16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0081] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.5178E-02 -2.9568E-03 3.7906E-04 6.1622E-04 3.2444E-04 9.4125E-05 -1.3659E-05 S2 2.7156E-02 6.0560E-03 1.8758E-03 1.3372E-03 2.5262E-04 -1.1127E-04 -1.0584E-04 S3 -3.9477E-02 1.5058E-02 -1.0568E-03 6.3088E-04 1.4751E-05 -1.7156E-04 -7.9067E-05 S4 -3.8535E-02 2.0059E-02 -7.7222E-04 -8.5244E-04 -2.5552E-04 -1.6019E-04 -5.1739E-05 S5 -3.7486E-02 2.6366E-02 6.3473E-03 4.4102E-04 1.7085E-04 1.2914E-04 -3.1810E-06 S6 -3.4265E-02 3.0527E-02 1.2407E-02 3.9229E-03 2.1162E-03 1.1030E-03 5.2194E-04 S7 -4.2350E-01 -3.9719E-02 -1.0024E-02 -2.6947E-03 1.5267E-04 1.0606E-04 3.4431E-04 S8 -6.2919E-01 -1.5889E-02 4.2199E-03 -7.4951E-04 3.0296E-03 1.0915E-04 8.9426E-04 S9 -5.4642E-01 -6.4884E-02 3.1728E-03 -7.8067E-03 2.9902E-03 -8.6252E-04 1.3741E-03 S10 -4.0417E-01 -3.2014E-02 1.1763E-02 -8.4316E-03 5.1031E-03 -2.4664E-03 2.1579E-03 S11 -5.9395E-01 -7.5918E-02 3.8280E-03 -1.5828E-02 6.5618E-03 -2.3346E-04 4.2530E-03 S12 -6.4561E-01 -2.7373E-03 2.1580E-02 -4.6754E-02 3.0797E-03 8.3693E-03 2.8790E-03 S13 -1.5008E+00 5.4427E-01 -1.2066E-01 -3.2577E-03 8.7393E-03 1.1961E-02 -5.9224E-03 S14 -3.5694E+00 3.8309E-01 -1.7947E-01 3.8121E-02 -5.0883E-03 8.9348E-03 -7.8363E-04

[0082] Table 2-1

[0083] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.7072E-05 -3.9172E-05 -2.8493E-05 -1.8716E-05 -8.4622E-06 -3.0996E-06 6.3883E-07 S2 -1.0469E-04 -7.4072E-05 -4.8118E-05 -2.0812E-05 -8.6320E-06 -1.1623E-06 5.6062E-07 S3 -5.9310E-05 -4.1790E-05 -2.5801E-05 -1.1036E-05 -3.7570E-06 -1.3026E-06 7.1106E-07 S4 -2.5848E-05 -1.3611E-05 -1.2748E-05 -6.7574E-06 -4.0315E-06 -1.1908E-06 -1.2834E-06 S5 1.8803E-05 -7.0906E-06 9.5660E-06 -4.3661E-06 4.4577E-06 -2.5908E-06 5.6698E-07 S6 2.7392E-04 1.4063E-04 7.1930E-05 2.8502E-05 1.1368E-05 2.4379E-06 -1.2230E-06 S7 1.1177E-04 1.2142E-04 5.7963E-05 5.0974E-05 2.1653E-05 8.1389E-06 2.9742E-06 S8 9.8248E-06 1.9814E-04 4.8071E-05 9.4721E-05 2.5005E-05 1.8686E-05 5.3610E-06 S9 -5.5901E-05 1.4192E-04 -2.5379E-05 7.6164E-05 1.2167E-05 8.9668E-06 1.0207E-05 S10 -6.7238E-04 2.5616E-04 -1.5601E-04 1.1688E-04 -5.1857E-05 1.2128E-05 -4.6849E-06 S11 -8.6411E-04 6.6377E-04 -3.4752E-05 1.9798E-04 -2.2768E-04 -7.8652E-06 -4.2104E-05 S12 -1.3394E-03 1.9577E-03 1.1221E-03 -4.6766E-04 -9.6619E-04 1.2876E-04 1.3947E-04 S13 -3.9280E-03 3.1496E-03 -2.1201E-03 -2.4426E-04 -1.2459E-03 2.0595E-03 -2.4757E-04 S14 -2.4547E-03 8.3787E-04 -3.3681E-03 1.8208E-03 -3.0789E-03 7.4533E-04 -2.4344E-03

[0084] Table 2-2

[0085] Table 3 shows the data of parameters such as the effective focal length f of the camera lens in Example 1, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0086] Basic data / Example 1 f(mm) 7.43 TTL(mm) 8.99 ImgH(mm) 5.10 Semi-FOV(°) 32.52 Fno 1.65 BFL(mm) 0.80 ET1(mm) 0.61 ET2(mm) 0.80 ET6(mm) 0.57 ET7(mm) 0.86 DT42(mm) 2.30 DT51(mm) 2.36 DT52(mm) 2.86 DT61(mm) 3.17

[0087] Table 3

[0088] Figure 2A The axial chromatic aberration curve of the imaging lens of Example 1 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 2B The astigmatism curve of the imaging lens of Example 1 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 2C The distortion curve of the camera lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The chromatic aberration curve of the camera lens of Example 1 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 2A to 2D It can be seen that the camera lens provided in Example 1 can achieve good imaging quality.

[0089] Example 2

[0090] The following reference Figures 3 to 4D The camera lens according to Embodiment 2 of the present application is described. 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 A schematic structural diagram of a camera lens according to embodiment 2 of the present application is shown.

[0091] like Figure 3As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens element E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. Seventh lens element E7 has negative refractive power, with a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0092] Table 4 shows the basic parameters of the camera lens of Example 2, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 5-1 and 5-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 2, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1.

[0093]

[0094] Table 4

[0095] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.3718E-02 -2.8663E-03 6.1718E-05 4.2041E-04 2.3833E-04 1.1193E-04 2.0703E-05 S2 2.3044E-02 4.1451E-03 1.2543E-03 9.7069E-04 3.2910E-04 3.9785E-05 3.4770E-06 S3 -3.9274E-02 1.2887E-02 -1.0333E-03 4.2882E-04 1.2428E-04 -3.5581E-05 -2.9650E-05 S4 -3.8512E-02 1.7338E-02 -1.5217E-04 -5.5624E-04 -1.2401E-04 -5.8751E-05 -1.8782E-05 S5 -2.7811E-02 3.6389E-02 8.9490E-03 1.0725E-03 3.9448E-04 2.6732E-04 5.7021E-05 S6 -4.0446E-02 2.2151E-02 8.4058E-03 2.2095E-03 9.2863E-04 4.9477E-04 1.9028E-04 S7 -3.9721E-01 -3.5754E-02 -8.8527E-03 -2.4040E-03 3.8789E-05 -4.4516E-05 2.0493E-04 S8 -6.0208E-01 -1.5754E-02 3.4859E-03 -1.6897E-03 2.2639E-03 -2.8741E-04 4.9778E-04 S9 -5.2104E-01 -6.0483E-02 3.6284E-03 -7.7531E-03 2.2789E-03 -1.0844E-03 7.3327E-04 S10 -5.0795E-01 -3.4454E-02 1.5426E-02 -4.2881E-03 9.1731E-03 -9.9982E-04 2.8490E-03 S11 -6.5475E-01 -9.3037E-02 6.3799E-03 -1.3833E-02 9.0834E-03 9.6061E-04 5.3740E-03 S12 -5.9410E-01 -5.0483E-03 2.5265E-02 -4.2936E-02 -1.1605E-03 5.1747E-03 1.8040E-03 S13 -1.4248E+00 5.0544E-01 -1.0095E-01 -8.4675E-03 2.0036E-03 1.1304E-02 -3.2896E-03 S14 -3.5563E+00 3.4917E-01 -1.6444E-01 3.5719E-02 -3.9845E-03 1.0373E-02 1.9672E-03

[0096] Table 5-1

[0097]

[0098]

[0099] Table 5-2

[0100] Table 6 gives the data of parameters such as the effective focal length f of the camera lens in Example 2, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0101] Basic data / Example 2 f(mm) 7.67 TTL(mm) 9.23 ImgH(mm) 5.10 Semi-FOV(°) 31.19 Fno 1.65 BFL(mm) 0.84 ET1(mm) 0.58 ET2(mm) 0.92 ET6(mm) 0.64 ET7(mm) 1.24 DT42(mm) 2.28 DT51(mm) 2.37 DT52(mm) 2.88 DT61(mm) 3.22

[0102] Table 6

[0103] Figure 4A The axial chromatic aberration curve of the imaging lens of Example 2 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the back of the lens. Figure 4BThe astigmatism curve of the imaging lens of Example 2 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 4C The distortion curve of the camera lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The chromatic aberration curve of the camera lens of Example 2 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4A to 4D It can be seen that the camera lens provided in Example 2 can achieve good imaging quality.

[0104] Example 3

[0105] The following reference Figures 5 to 6D The imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of a camera lens according to embodiment 3 of the present application is shown.

[0106] like Figure 5 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens element E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. Seventh lens element E7 has negative refractive power, with a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0107] Table 7 shows the basic parameters of the camera lens of Example 3, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 3, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1.

[0108]

[0109] Table 7

[0110] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.5178E-02 -2.9568E-03 3.7906E-04 6.1622E-04 3.2444E-04 9.4125E-05 -1.3659E-05 S2 2.7156E-02 6.0560E-03 1.8758E-03 1.3372E-03 2.5262E-04 -1.1127E-04 -1.0584E-04 S3 -3.9477E-02 1.5058E-02 -1.0568E-03 6.3088E-04 1.4751E-05 -1.7156E-04 -7.9067E-05 S4 -3.8535E-02 2.0059E-02 -7.7222E-04 -8.5244E-04 -2.5552E-04 -1.6019E-04 -5.1739E-05 S5 -3.7486E-02 2.6366E-02 6.3473E-03 4.4102E-04 1.7085E-04 1.2914E-04 -3.1810E-06 S6 -3.4265E-02 3.0527E-02 1.2407E-02 3.9229E-03 2.1162E-03 1.1030E-03 5.2194E-04 S7 -4.2350E-01 -3.9719E-02 -1.0024E-02 -2.6947E-03 1.5267E-04 1.0606E-04 3.4431E-04 S8 -6.2919E-01 -1.5889E-02 4.2199E-03 -7.4951E-04 3.0296E-03 1.0915E-04 8.9426E-04 S9 -5.4642E-01 -6.4884E-02 3.1728E-03 -7.8067E-03 2.9902E-03 -8.6252E-04 1.3741E-03 S10 -4.0417E-01 -3.2014E-02 1.1763E-02 -8.4316E-03 5.1031E-03 -2.4664E-03 2.1579E-03 S11 -5.9395E-01 -7.5918E-02 3.8280E-03 -1.5828E-02 6.5618E-03 -2.3346E-04 4.2530E-03 S12 -6.4561E-01 -2.7373E-03 2.1580E-02 -4.6754E-02 3.0797E-03 8.3693E-03 2.8790E-03 S13 -1.5008E+00 5.4427E-01 -1.2066E-01 -3.2577E-03 8.7393E-03 1.1961E-02 -5.9224E-03 S14 -3.5694E+00 3.8309E-01 -1.7947E-01 3.8121E-02 -5.0883E-03 8.9348E-03 -7.8363E-04

[0111] Table 8-1

[0112] Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.7072E-05 -3.9172E-05 -2.8493E-05 -1.8716E-05 -8.4622E-06 -3.0996E-06 6.3883E-07 S2 -1.0469E-04 -7.4072E-05 -4.8118E-05 -2.0812E-05 -8.6320E-06 -1.1623E-06 5.6062E-07 S3 -5.9310E-05 -4.1790E-05 -2.5801E-05 -1.1036E-05 -3.7570E-06 -1.3026E-06 7.1106E-07 S4 -2.5848E-05 -1.3611E-05 -1.2748E-05 -6.7574E-06 -4.0315E-06 -1.1908E-06 -1.2834E-06 S5 1.8803E-05 -7.0906E-06 9.5660E-06 -4.3661E-06 4.4577E-06 -2.5908E-06 5.6698E-07 S6 2.7392E-04 1.4063E-04 7.1930E-05 2.8502E-05 1.1368E-05 2.4379E-06 -1.2230E-06 S7 1.1177E-04 1.2142E-04 5.7963E-05 5.0974E-05 2.1653E-05 8.1389E-06 2.9742E-06 S8 9.8248E-06 1.9814E-04 4.8071E-05 9.4721E-05 2.5005E-05 1.8686E-05 5.3610E-06 S9 -5.5901E-05 1.4192E-04 -2.5379E-05 7.6164E-05 1.2167E-05 8.9668E-06 1.0207E-05 S10 -6.7238E-04 2.5616E-04 -1.5601E-04 1.1688E-04 -5.1857E-05 1.2128E-05 -4.6849E-06 S11 -8.6411E-04 6.6377E-04 -3.4752E-05 1.9798E-04 -2.2768E-04 -7.8652E-06 -4.2104E-05 S12 -1.3394E-03 1.9577E-03 1.1221E-03 -4.6766E-04 -9.6619E-04 1.2876E-04 1.3947E-04 S13 -3.9280E-03 3.1496E-03 -2.1201E-03 -2.4426E-04 -1.2459E-03 2.0595E-03 -2.4757E-04 S14 -2.4547E-03 8.3787E-04 -3.3681E-03 1.8208E-03 -3.0789E-03 7.4533E-04 -2.4344E-03

[0113] Table 8-2

[0114] Table 9 gives the data of parameters such as the effective focal length f of the camera lens in Example 3, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0115] Basic data / Example 3 f(mm) 7.75 TTL(mm) 9.41 ImgH(mm) 4.90 Semi-FOV(°) 30.33 Fno 1.65 BFL(mm) 0.81 ET1(mm) 0.53 ET2(mm) 0.92 ET6(mm) 0.91 ET7(mm) 1.36 DT42(mm) 2.32 DT51(mm) 2.41 DT52(mm) 2.75 DT61(mm) 3.22

[0116] Table 9

[0117] Figure 6A The axial chromatic aberration curve of the imaging lens of Example 3 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the imaging lens of Example 3 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 6C The distortion curve of the camera lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6D The chromatic aberration curve of the camera lens of Example 3 is shown, which indicates the deviation of the different image heights on the imaging surface after the light passes through the lens. 6A to 6D It can be seen that the camera lens provided in Example 3 can achieve good imaging quality.

[0118] Example 4

[0119] The following reference Figures 7 to 8D The imaging lens according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of a camera lens according to Example 4 of the present application is shown.

[0120] like Figure 7As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens element E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. Seventh lens element E7 has negative refractive power, with a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0121] Table 10 shows the basic parameters of the camera lens of Example 4, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 11-1 and 11-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 4, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1.

[0122]

[0123] Table 10

[0124]

[0125]

[0126] Table 11-1

[0127] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.4770E-06 -1.0502E-05 -5.2577E-06 -9.4740E-06 -3.8278E-06 -3.1214E-06 -5.8569E-07 S2 -2.8261E-05 -1.7361E-05 -1.7886E-05 -8.9551E-06 -6.6287E-06 -2.7478E-06 -2.1088E-06 S3 -8.7463E-06 -4.6005E-06 -4.1020E-06 -2.5749E-07 -3.1143E-07 -1.6393E-06 -2.0376E-06 S4 1.0977E-05 -1.5641E-05 3.9961E-06 -7.4155E-06 5.5912E-06 -1.6293E-06 4.3408E-06 S5 -4.4678E-05 5.0186E-05 -2.9121E-05 1.9425E-05 -2.0568E-05 5.0198E-06 -2.0557E-05 S6 2.5637E-05 -4.3339E-06 5.5708E-06 -4.8273E-06 6.4322E-06 -2.0716E-06 2.9708E-06 S7 1.5862E-04 2.7377E-05 5.5028E-05 1.5895E-06 2.2756E-05 -2.9977E-06 1.3296E-05 S8 -6.6912E-05 8.3760E-05 6.3447E-05 5.0560E-05 8.2174E-06 9.4678E-06 -8.0473E-06 S9 -1.5412E-04 -1.0123E-04 2.1834E-04 5.0776E-05 8.4783E-05 1.0812E-05 4.6589E-05 S10 -7.2684E-04 2.0521E-04 4.8620E-05 -1.2999E-04 1.9655E-05 -1.5979E-05 2.1628E-05 S11 -6.3744E-05 1.1190E-04 1.5457E-04 4.3298E-05 8.9250E-05 -2.0967E-05 -2.7759E-05 S12 1.0562E-04 -3.3409E-04 -2.1222E-04 -1.0539E-04 2.0124E-04 1.6252E-04 3.9008E-05 S13 1.1057E-04 2.4813E-05 -2.1518E-04 -1.2431E-04 2.6729E-05 9.3523E-05 -1.6546E-05 S14 5.8824E-04 -8.6808E-05 9.3778E-05 6.9312E-04 2.0741E-04 -1.0525E-04 -3.5024E-04

[0128] Table 11-2

[0129] Table 12 gives the data of parameters such as the effective focal length f of the camera lens in Example 4, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0130] Basic data / Example 4 f(mm) 7.40 TTL(mm) 8.95 ImgH(mm) 4.50 Semi-FOV(°) 29.72 Fno 1.65 BFL(mm) 0.79 ET1(mm) 0.57 ET2(mm) 0.79 ET6(mm) 0.45 ET7(mm) 0.97 DT42(mm) 2.31 DT51(mm) 2.34 DT52(mm) 2.72 DT61(mm) 3.01

[0131] Table 12

[0132] Figure 8A The axial chromatic aberration curve of the imaging lens of Example 4 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 8BThe astigmatism curve of the imaging lens of Example 4 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 8C The distortion curve of the camera lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8D The chromatic aberration curve of the camera lens of Example 4 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8A to 8D It can be seen that the camera lens provided in Example 4 can achieve good imaging quality.

[0133] Example 5

[0134] The following reference Figures 9 to 10D The imaging lens according to Embodiment 5 of the present application is described. Figure 9 A schematic structural diagram of a camera lens according to embodiment 5 of the present application is shown.

[0135] like Figure 9 As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has positive focal power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens element E5 has negative focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. Seventh lens element E7 has negative power, with a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0136] Table 13 shows the basic parameters of the camera lens of Example 5, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 14-1 and 14-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 5, where the surface shapes of the various aspherical surfaces can be defined by formula (1) given in Example 1.

[0137]

[0138] Table 13

[0139]

[0140]

[0141] Table 14-1

[0142] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.2712E-05 -2.9199E-05 -5.7312E-05 -5.0561E-05 -3.4237E-05 -1.4707E-05 -4.0706E-06 S2 -1.2731E-05 9.9721E-07 -1.5844E-06 1.4582E-06 1.1358E-06 -6.4196E-07 -1.4985E-06 S3 1.3513E-04 1.2241E-04 8.9039E-05 5.9828E-05 3.2196E-05 1.1628E-05 2.3815E-06 S4 -1.1849E-04 -6.6662E-05 2.9821E-05 7.0590E-05 4.7420E-05 1.4642E-05 -3.4031E-07 S5 -3.0890E-04 -3.1550E-04 -1.4435E-04 -4.2485E-06 3.8121E-05 2.4831E-05 5.0697E-06 S6 3.9217E-04 1.1714E-04 1.9815E-05 7.4161E-06 1.6624E-05 1.5754E-05 6.6284E-06 S7 -1.3591E-04 -4.0006E-05 1.4168E-04 2.0058E-04 1.7243E-04 8.8377E-05 2.9834E-05 S8 -2.4073E-04 5.5013E-04 6.9090E-04 5.3888E-04 2.8405E-04 1.1543E-04 1.8448E-05 S9 6.1097E-04 6.0499E-04 1.5704E-04 1.4314E-04 4.4715E-05 4.9937E-05 2.8236E-05 S10 -1.2632E-03 -1.8582E-06 1.5694E-04 7.4149E-04 2.8285E-04 1.8551E-04 -7.9418E-07 S11 -9.5672E-04 9.7142E-04 -4.6813E-04 3.3743E-04 -3.7756E-04 -1.1331E-04 -1.4588E-04 S12 -9.6524E-04 1.6566E-03 -1.6635E-03 -1.5204E-04 -4.5086E-04 3.9111E-05 -5.8047E-05 S13 -1.1876E-02 5.9129E-03 -1.9436E-03 -1.0165E-03 -9.5803E-04 -3.0709E-04 2.6735E-04 S14 -2.6666E-02 2.3261E-02 -1.3085E-02 3.8678E-03 -8.0973E-03 -7.2680E-04 -2.2885E-03

[0143] Table 14-2

[0144] Table 15 gives the data of parameters such as the effective focal length f of the camera lens in Example 5, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0145] Basic data / Example 5 f(mm) 7.68 TTL(mm) 9.58 ImgH(mm) 4.20 Semi-FOV(°) 25.48 Fno 1.85 BFL(mm) 1.05 ET1(mm) 0.88 ET2(mm) 0.78 ET6(mm) 0.72 ET7(mm) 1.18 DT42(mm) 1.97 DT51(mm) 1.99 DT52(mm) 2.23 DT61(mm) 2.63

[0146] Table 15

[0147] Figure 10A The axial chromatic aberration curve of the imaging lens of Example 5 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 10B The astigmatism curve of the imaging lens of Example 5 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 10C The distortion curve of the camera lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 10D The chromatic aberration curve of the camera lens of Example 5 is shown, which indicates the deviation of the different image heights on the imaging surface after the light passes through the lens. 10A to 10D It can be seen that the camera lens provided in Example 5 can achieve good imaging quality.

[0148] Example 6

[0149] The following reference Figures 11 to 12D The imaging lens according to Embodiment 6 of the present application is described. Figure 11 A structural schematic diagram of a camera lens according to Example 6 of the present application is shown.

[0150] like Figure 11As shown, the camera lens includes, from the object side to the image side, an aperture STO, a first lens element E1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an imaging surface S17. The first lens element E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens element E2 has negative focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens element E3 has positive focal power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens element E4 has negative focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens element E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens element E6 has positive focal power, with its object-side surface S11 being convex and its image-side surface S12 being convex. Seventh lens element E7 has negative power, with a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through surfaces S1 to S16 in sequence and is ultimately imaged on imaging surface S17.

[0151] Table 16 shows the basic parameters of the camera lens of Example 6, where the units of curvature radius, thickness / distance, and effective focal length are all in millimeters (mm). Tables 17-1 and 17-2 show the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1.

[0152]

[0153]

[0154] Table 16

[0155] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.9601E-02 -1.6958E-02 -4.7401E-03 -8.9673E-04 -2.2515E-04 3.3046E-06 -2.6287E-05 S2 5.9745E-03 -7.0102E-03 6.0473E-04 -4.0127E-04 7.7349E-05 -6.3109E-05 2.0671E-05 S3 -3.9598E-02 1.7881E-02 -1.0764E-04 -3.3588E-04 1.5084E-04 -6.2970E-05 3.1036E-05 S4 -3.9290E-02 2.0886E-02 1.4880E-03 -1.6832E-04 8.4775E-05 -2.9595E-06 3.1709E-05 S5 -4.1950E-02 1.8476E-02 5.4264E-03 3.4342E-04 2.9352E-04 7.9446E-05 4.7821E-05 S6 -4.4593E-02 7.6577E-03 2.4891E-03 4.5901E-05 9.3299E-05 3.9126E-05 1.8881E-05 S7 -2.1661E-01 -1.1119E-02 -2.7313E-03 -1.2202E-03 -2.5203E-04 -1.3206E-04 -3.9489E-05 S8 -4.0912E-01 -2.8872E-03 1.4311E-03 -1.5425E-03 5.0487E-04 -1.9768E-04 1.4630E-04 S9 -3.6918E-01 -1.2121E-02 1.1019E-02 -1.6449E-03 1.6786E-03 -1.9400E-04 7.1902E-04 S10 -1.2513E-01 4.9471E-03 1.4708E-02 -2.2318E-03 3.5118E-03 -1.4383E-03 4.0960E-04 S11 -2.2114E-01 -3.1258E-03 1.1631E-02 -2.5896E-03 5.5452E-03 -1.2885E-03 -4.6592E-04 S12 -1.2789E-01 -2.1046E-02 1.5670E-02 -3.6559E-03 7.9038E-03 -1.3966E-03 -3.1774E-04 S13 -7.7723E-01 1.2723E-01 -6.4460E-03 -1.0865E-02 7.7825E-03 -7.1099E-06 -2.9184E-03 S14 -2.0469E+00 2.0238E-01 -4.2541E-02 -2.8258E-03 3.7656E-03 1.0544E-03 -1.6448E-03

[0156] Table 17-1

[0157] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.4644E-05 -7.8082E-06 7.3527E-06 -8.2879E-06 1.5882E-06 -2.2666E-06 5.8804E-06 S2 -2.8037E-05 -6.1295E-06 -9.2818E-06 -4.5300E-06 2.5845E-06 3.0551E-06 2.9653E-06 S3 -3.3419E-05 -1.0197E-05 -9.9717E-06 -4.8924E-06 3.3339E-06 9.8830E-07 2.1429E-06 S4 5.1729E-07 -7.0044E-06 -6.6928E-06 -9.5013E-06 -1.8883E-06 -2.1612E-07 1.7222E-06 S5 -1.8819E-07 -1.3600E-05 -1.0973E-05 -1.4053E-05 -5.4299E-06 -1.4924E-06 1.4955E-06 S6 2.0531E-05 6.8637E-07 6.7423E-06 -8.8445E-06 -4.5095E-06 -2.9900E-06 2.9984E-06 S7 -2.1703E-05 -2.3333E-05 -8.6933E-06 -1.1482E-05 -5.4989E-06 -7.9201E-06 -3.7525E-06 S8 -2.0729E-05 4.5350E-05 -2.2723E-06 2.2085E-05 -2.9482E-06 7.6484E-06 -4.0788E-06 S9 3.8036E-05 3.1156E-04 7.1048E-05 4.4110E-05 3.2108E-06 -2.4861E-04 -7.5769E-05 S10 -1.3475E-04 6.5456E-05 -2.1653E-05 1.6111E-05 -5.5035E-06 -1.4179E-06 6.5519E-07 S11 1.9083E-04 -1.3704E-04 4.3449E-05 7.3903E-05 8.1681E-05 -6.1584E-05 -3.6556E-05 S12 9.7882E-04 6.2379E-04 7.5068E-04 4.6605E-04 4.4358E-04 1.1332E-04 2.9398E-05 S13 -2.4122E-04 -5.0992E-05 8.2556E-05 9.0290E-05 2.7508E-04 1.2177E-04 1.2652E-04 S14 1.3915E-04 -2.8318E-04 5.0718E-05 -2.4148E-04 -7.1367E-06 -4.8025E-06 6.5218E-05

[0158] Table 17-2

[0159] Table 18 gives the data of parameters such as the effective focal length f of the camera lens in Example 6, the distance TTL from the object side surface of the first lens of the camera lens to the imaging plane on the optical axis, etc.

[0160]

[0161]

[0162] Table 18

[0163] Figure 12AThe axial chromatic aberration curve of the imaging lens of Example 6 is shown, which indicates the deviation of the convergence point of light of different wavelengths passing through the lens. Figure 12B The astigmatism curve of the imaging lens of Example 6 is shown, which indicates meridional field curvature and sagittal field curvature. Figure 12C The distortion curve of the camera lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 12D The chromatic aberration curve of the camera lens of Example 6 is shown, which indicates the deviation of the different image heights on the imaging surface after the light passes through the lens. 12A to 12D It can be seen that the camera lens provided in Example 6 can achieve good imaging quality.

[0164] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 19.

[0165] Conditional formula / Example 1 2 3 4 5 6 T67 / BFL 1.21 1.10 1.13 1.21 0.95 0.78 f / (f6+f7) 1.00 1.33 1.34 1.07 1.89 0.25 R8 / f -42.67 -26.06 -12.70 -27.01 -13.02 -10.92 CT6 / CT3 2.06 2.64 3.68 1.24 2.58 1.82 T34 / T23 2.94 1.89 1.95 3.15 1.19 1.30 (R5+R6) / f3 0.65 0.71 0.71 0.17 0.06 0.81 (R3+R4) / (f2-f) -1.41 -1.10 -1.12 -1.40 -1.77 -1.06 ET7 / ET6 1.50 1.95 1.49 2.18 1.63 1.48 ET2 / CT2-ET1 / CT1 1.03 1.09 1.13 1.15 0.85 1.18 ∣R12-R11∣ / ∣R14-R13∣ 2.79 2.72 2.27 2.54 1.84 0.08 (CT3+CT4+CT5) / (T34+T45) 1.61 1.40 1.34 1.89 2.58 1.91 f1 / R2×R1 -0.21 -0.09 -0.12 -0.37 -0.58 -0.02 (DT42+DT51) / (DT52+DT61) 0.77 0.76 0.79 0.81 0.81 0.89 R1 / CT1 2.17 2.15 2.16 2.20 2.16 1.95

[0166] Table 19

[0167] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone 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 camera lens described above.

[0168] The above description is merely a preferred embodiment of the present application and an illustration 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 the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A camera lens, characterized in that: Along the optical axis from the object side to the image side, it includes: a first lens having positive refractive power, wherein both the object-side surface and the image-side surface are convex; a second lens having negative optical power, the object-side surface of which is convex and the image-side surface of which is concave; The third lens has positive optical power, its object-side surface is convex and its image-side surface is concave; The fourth lens has a convex image-side surface; Fifth lens; a sixth lens element having positive optical power and a convex object-side surface; and a seventh lens element having negative optical power and a concave image-side surface; and The camera lens meets the following requirements: -350mm <R8<-50mm; 20° <Semi-FOV≤32.52°; 3.68 ≥ CT6 / CT3 ≥ 1.24; and -42.67≤R8 / f≤-10.92; 0.25≤f / (f6+f7)≤1.89; 0.08≤|R12-R11| / |R14-R13|≤2.79; Wherein, R8 is the radius of curvature of the image side surface of the fourth lens, Semi-FOV is the maximum half field of view angle of the camera lens, CT6 is the center thickness of the sixth lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, f is the effective focal length of the camera lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, R11 is the radius of curvature of the object side surface of the sixth lens, R12 is the radius of curvature of the image 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; At least one of the fourth lens and the fifth lens has negative optical power; The number of lenses having optical power in the camera lens is seven.

2. The imaging lens according to claim 1, wherein: The entrance pupil diameter EPD of the camera lens and the effective focal length f of the camera lens satisfy the following: 1.65≤f / EPD<2.

3. The imaging lens according to claim 1, wherein: The first lens satisfies: -0.58mm≤f1 / R2×R1<0, wherein, f1 is the effective focal length of the first lens, R1 is the curvature radius of the object-side surface of the first lens, and R2 is the curvature radius of the image-side surface of the first lens.

4. The imaging lens according to claim 1, wherein: The signs of the curvature radii of the object-side surface and the image-side surface of the second lens are both positive and satisfy: -1.77≤(R3+R4) / (f2-f)≤-1.06, wherein, f is the effective focal length of the camera lens, f2 is the effective focal length of the second lens, R3 is the curvature radius of the object side of the second lens, and R4 is the curvature radius of the image side of the second lens.

5. The imaging lens according to claim 1, wherein: The air gap T23 between the second lens and the third lens on the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.19≤T34 / T23≤3.

15.

6. The imaging lens according to claim 1, wherein: A central thickness CT1 of the first lens on the optical axis and a curvature radius R1 of the object-side surface of the first lens satisfy the following relationship: 1.95≤R1 / CT1≤2.

20.

7. The imaging lens according to claim 1, wherein: An air gap T67 between the sixth lens and the seventh lens on the optical axis and an on-axis distance BFL from the image side surface of the seventh lens to the imaging surface of the camera lens satisfy the following: 0.78≤T67 / BFL≤1.

21.

8. The imaging lens according to claim 1, wherein: The curvature radius R5 of the object-side surface of the third lens, the curvature radius R6 of the image-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 0.06≤(R5+R6) / f3≤0.

81.

9. The imaging lens according to any one of claims 1 to 8, wherein: The center thickness CT1 of the first lens on the optical axis, the edge thickness ET1 of the first lens, the center thickness CT2 of the second lens on the optical axis, and the edge thickness ET2 of the second lens satisfy: 0.85≤ET2 / CT2-ET1 / CT1≤1.

18.

10. The imaging lens according to any one of claims 1 to 8, wherein: An edge thickness ET6 of the first lens and an edge thickness ET7 of the third lens satisfy the following: 1.48≤ET7 / ET6≤2.

18.

11. The imaging lens according to any one of claims 1 to 8, wherein: The center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following requirements: 1.34≤(CT3+CT4+CT5) / (T34+T45)≤2.

58.

12. The imaging lens according to any one of claims 1 to 8, wherein: The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy the following: |f1|<|f2|<|f3|.

13. The imaging lens according to any one of claims 1 to 8, wherein: At least three lenses from the first to the seventh lenses have an Abbe number greater than 50.

14. The imaging lens according to any one of claims 1 to 8, wherein: The effective radius DT42 of the image side surface of the fourth lens, the effective radius DT51 of the object side surface of the fifth lens, the effective radius DT52 of the image side surface of the fifth lens, and the effective radius DT61 of the object side surface of the sixth lens satisfy: 0.76≤(DT42+DT51) / (DT52+DT61)≤0.89.

Images