A camera lens

Abstract

The present application discloses a camera lens, which comprises, along the optical axis from the object side to the image side, a first lens having an optical focal power; a second lens having an optical focal power; a third lens having an optical focal power; a fourth lens having an optical focal power; a fifth lens having an optical focal power; a sixth lens having an optical focal power; a seventh lens having an optical focal power; and an eighth lens having an optical focal power; the first lens, the second lens, the third lens, the fifth lens, and the seventh lens have the same optical focal power; the effective focal length f of the camera lens, the entrance pupil diameter EPD of the camera lens, the full f / EDP ≤ 1.89; the on-axis distance TD from the object side of the first lens to the image side of the last lens satisfies: 5.0 mm < TD < 6.0 mm; the effective focal length f1 of the first lens, the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first and second lenses on the optical axis satisfy: 27.0 mm < f1 × (R2-R1) / (T12 + CT1) < 36.5 mm.

Description

Technical Field

[0001] The present invention relates to the field of optics, and in particular to a camera lens. Background Art

[0002] With the advancement of science and technology, the quality of mobile phone cameras has also improved rapidly. Currently, mobile phone lenses are moving towards larger image areas, larger apertures, and ultra-thin designs. Large image areas mean higher resolution, resulting in clearer images. Large apertures allow more light to enter, allowing for brighter images in darker environments. Ultra-thin designs mean the lens itself is relatively thin, adapting to increasingly thinner phone bodies. However, the image area of ​​a lens is directly proportional to its thickness; the larger the image area, the thicker the lens. Large apertures also affect image quality.

[0003] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0004] The present application aims to provide a camera lens that ensures that the eight-element camera lens has a large image surface and a large aperture while also being ultra-thin, so as to meet the growing photography needs of customers.

[0005] The present application provides a camera lens, wherein the number of lenses with optical power in the camera lens is eight, and the eight lenses include, from the object side to the image side along the optical axis, the following: a first lens with optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power; and an eighth lens with optical power; wherein the first lens, the second lens, the third lens, the fifth lens, and the seventh lens have the same optical power; wherein the effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens satisfy: f / ED P≤1.89; wherein, half of the maximum field of view angle Semi-FOV of the camera lens satisfies: Semi-FOV>40°; wherein, the on-axis distance TD from the object side of the first lens to the image side of the last lens satisfies: 5.0mm<TD<6.0mm; wherein, the effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, the curvature radius R2 of the image side of the first lens, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 27.0mm<f1×(R2-R1) / (T12+CT1)<36.5mm.

[0006] According to one embodiment of the present application, the effective focal length f3 of the third lens, the curvature radius R5 of the object side of the third lens, the center thickness CT3 of 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 the following: f3>0; -24.1<f3 / R5+CT3 / T34<-5.0.

[0007] According to one embodiment of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the curvature radius R6 of the image side surface of the third lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -29.0<f4 / R7+f3 / R6<-10.5.

[0008] According to one embodiment of the present application, the effective focal length f1 of the first lens, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 9.5 mm -1 <V1 / f1+V2 / f2<11.5mm -1 .

[0009] According to one embodiment of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the Abbe number V3 of the third lens, and the Abbe number V4 of the fourth lens satisfy: -3.0 mm -1 <V3 / f3+V4 / f4<-1.0mm -1 .

[0010] According to one embodiment of the present application, the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens, the Abbe number V7 of the seventh lens, and the Abbe number V8 of the eighth lens satisfy: -1.5 mm -1 <V7 / f7+V8 / f8<20.0mm -1 .

[0011] According to one embodiment of the present application, an air interval T78 between the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy: 3.9<T78 / CT8<5.7.

[0012] According to one embodiment of the present application, a curvature radius R10 of the image-side surface of the fifth lens, a curvature radius R11 of the object-side surface of the sixth lens, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and an air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 12.5<|R10-R11| / (CT5+T56+CT6)<22.0.

[0013] According to one embodiment of the present application, the effective focal length f5 of the fifth lens, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the curvature radius R9 of the object side of the fifth lens satisfy the following: 0.0≤f5×T45 / (CT5×R9)≤2.0.

[0014] According to one embodiment of the present application, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy the following: 9.0<|f5+f6| / (CT5+CT6)<17.0.

[0015] According to one embodiment of the present application, a curvature radius R13 of the object-side surface of the seventh lens, a curvature radius R14 of the image-side surface of the seventh lens, an air gap T67 between the sixth lens and the seventh lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy the following: 2.5<(R13-R14) / (T67+T78)<7.5.

[0016] According to one embodiment of the present application, an air interval T56 between the fifth lens and the sixth lens on the optical axis, and an air interval T23 between the second lens and the third lens on the optical axis satisfy: 1.5<T56 / T23<3.0.

[0017] According to one embodiment of the present application, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and an air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 5.0≤(CT3+CT4) / T34≤6.0.

[0018] Beneficial effects of this application:

[0019] The camera lens provided in the present application includes multiple lenses, such as the first lens to the eighth lens. By setting the first lens, the second lens, the third lens, the fifth lens and the seventh lens to have the same optical focal length, the optical focal length of the system can be better distributed, the aberration can be balanced, and the image quality of the system can be improved; by controlling the ratio of the effective focal length of the camera lens to the entrance pupil diameter of the camera lens, the aperture of the system can be ensured to be large, and a brighter picture can be achieved in a dark room; by controlling half of the maximum field of view angle of the camera lens within a reasonable range, a larger shooting range can be achieved; by controlling the axial distance from the object side of the first lens to the image side of the last lens within a certain range, the thickness of the system can be ensured to be within a certain range, and the image quality can be better; by controlling f1×(R2-R1) / (T12+CT1) within a certain range, the optical focal length and shape of the first lens can be controlled so that it can better collect light and has better processing and molding characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a structural diagram of a camera lens embodiment 1 of the present application;

[0022] Figures 2a to 2d They are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens embodiment 1 of the present application;

[0023] Figure 3 This is a schematic structural diagram of a second embodiment of the camera lens of the present application;

[0024] Figures 4a to 4d They are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens embodiment 2 of the present application;

[0025] Figure 5 This is a structural diagram of a camera lens embodiment 3 of the present application;

[0026] Figures 6a to 6d They are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens embodiment 3 of the present application;

[0027] Figure 7 This is a structural diagram of a camera lens embodiment 4 of the present application;

[0028] Figures 8a to 8dThey are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens embodiment 4 of the present application;

[0029] Figure 9 This is a structural diagram of a camera lens embodiment 5 of the present application;

[0030] Figures 10a to 10d They are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens embodiment 5 of the present application;

[0031] Figure 11 This is a structural diagram of a camera lens embodiment 6 of the present application;

[0032] Figures 12a to 12d They are respectively the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of Example 6 of the camera lens of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In this application, the paraxial region refers to the region 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 far beam surface of the lens, and the surface of each lens closest to the imaging plane is called the near beam surface of the lens.

[0038] 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 manner unless expressly defined as such herein.

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present application can be combined with each other. The features, principles and other aspects of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] Exemplary embodiments

[0041] The exemplary camera lens of the present application includes eight lenses, which include, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein each lens is independent of each other and there is an air gap between each lens on the optical axis.

[0042] In an exemplary embodiment of the present application, the camera lens includes a first lens having optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having optical power. In this embodiment of the present application, the first, second, third, fifth, and seventh lenses have the same optical power, which effectively distributes the optical power of the system, balances aberrations, and improves the image quality of the system.

[0043] In the embodiments of the present application, the effective focal length f of the camera lens and the entrance pupil diameter (EPD) of the camera lens satisfy the following conditions: f / EDP ≤ 1.89. By controlling the ratio of the effective focal length to the entrance pupil diameter to be less than 1.89, a larger aperture can be ensured for the system, enabling brighter images in a dark room. More specifically, the effective focal length f of the camera lens and the entrance pupil diameter (EPD) of the camera lens satisfy the following conditions: f / EDP ≤ 1.89.

[0044] In the exemplary embodiment of the present application, the Semi-FOV, half of the maximum field of view of the camera lens, satisfies the following conditions: Semi-FOV > 40°. By controlling the Semi-FOV to be greater than 40°, a larger shooting range can be achieved. More specifically, the Semi-FOV, half of the maximum field of view of the camera lens, satisfies the following conditions: Semi-FOV > 41.0°.

[0045] In an exemplary embodiment of the present application, the on-axis distance TD from the object side of the first lens to the image side of the last lens satisfies the following conditions: 5.0mm < TD < 6.0mm. By controlling the on-axis distance from the object side of the first lens to the image side of the last lens within a certain range, the system thickness can be kept within a certain range while maintaining good image quality. More specifically, the on-axis distance TD from the object side of the first lens to the image side of the last lens satisfies the following conditions: 5.20mm < TD < 5.90mm.

[0046] In an exemplary embodiment of the present application, the effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, the curvature radius R2 of the image side of the first lens, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 27.0mm<f1×(R2-R1) / (T12+CT1)<36.5mm. By controlling the value of this conditional expression within a certain range, the optical power and shape of the first lens can be controlled so that it can better collect light and has better processing and molding characteristics. More specifically, the effective focal length f1 of the first lens, the curvature radius R1 of the object side of the first lens, the curvature radius R2 of the image side of the first lens, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 27.01mm<f1×(R2-R1) / (T12+CT1)<36.49mm.

[0047] In an exemplary embodiment of the present application, the effective focal length f3 of the third lens, the radius of curvature R5 of the object side of the third lens, the center thickness CT3 of 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 the following conditions: f3 > 0; -24.1 < f3 / R5 + CT3 / T34 < -5.0. By controlling the above conditional expressions within a certain range, the off-axis aberrations and sensitivity of the system can be reasonably controlled, thereby improving the system yield and image quality. More specifically, the effective focal length f3 of the third lens, the radius of curvature R5 of the object side of the third lens, the center thickness CT3 of 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 the following conditions: f3 > 0; -24.09 < f3 / R5 + CT3 / T34 < -5.01.

[0048] In an exemplary embodiment of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the curvature radius R6 of the image side surface of the third lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -29.0<f4 / R7+f3 / R6<-10.5. By controlling the above conditional expression within a certain range, the focal length distribution of the third lens and the fourth lens can be reasonably allocated, the off-axis aberration of the system can be reduced, and the image quality of the system can be improved. More specifically, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the curvature radius R6 of the image side surface of the third lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -28.99<f4 / R7+f3 / R6<-10.51.

[0049] In the exemplary embodiment of the present application, the effective focal length f1 of the first lens, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 9.5 mm -1 <V1 / f1+V2 / f2<11.5mm -1 By controlling the above conditional expressions within a certain range, the apertures of the first and second lenses can be controlled to achieve the characteristics of a large aperture of the system. More specifically, the effective focal length f1 of the first lens, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 9.51mm -1 <V1 / f1+V2 / f2<11.49mm -1 .

[0050] In the exemplary embodiment of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the Abbe number V3 of the third lens, and the Abbe number V4 of the fourth lens satisfy: -3.0 mm -1 <V3 / f3+V4 / f4<-1.0mm -1 By controlling the above conditional expression within a certain range, the optical power and material of the first and second lenses can be controlled, thereby reducing the vertical axis aberration of the system and improving the image quality of the system. More specifically, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the Abbe number V3 of the third lens, and the Abbe number V4 of the fourth lens satisfy: -2.99mm -1 <V3 / f3+V4 / f4<-1.01mm -1 .

[0051] In the exemplary embodiment of the present application, the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens, the Abbe number V7 of the seventh lens, and the Abbe number V8 of the eighth lens satisfy: -1.5 mm -1 <V7 / f7+V8 / f8<20.0mm -1By controlling the above conditional expressions within a certain range, the optical power and material of the first and second lenses can be controlled, thereby controlling the system distortion and the incident angle between the principal ray and the image plane, reducing the system's signal-to-noise ratio, and improving the system's image quality. More specifically, the effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens, the Abbe number V7 of the seventh lens, and the Abbe number V8 of the eighth lens satisfy: -1.49mm -1 <V7 / f7+V8 / f8<19.99mm -1 .

[0052] In the exemplary embodiment of the present application, the air spacing T78 between the seventh and eighth lenses on the optical axis, as well as the center thickness CT8 of the eighth lens on the optical axis, satisfy the following conditions: 3.9 < T78 / CT8 < 5.7. By controlling this conditional expression within a certain range, the air spacing between the seventh and eighth lenses on the optical axis can be controlled to be neither too small to meet assembly tolerances and prevent the lenses from colliding, nor too large, thereby reducing the overall length of the system and ensuring the processing and molding characteristics of the eighth lens. More specifically, the air spacing T78 between the seventh and eighth lenses on the optical axis, as well as the center thickness CT8 of the eighth lens on the optical axis, satisfy the following conditions: 3.91 < T78 / CT8 < 5.69.

[0053] In an exemplary embodiment of the present application, the radius of curvature R10 of the image-side surface of the fifth lens, the radius of curvature R11 of the object-side surface of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 12.5<|R10-R11| / (CT5+T56+CT6)<22.0. By controlling the above conditional expression within a certain range, the spherical aberration contribution of the fifth lens and the sixth lens can be reasonably distributed, thereby achieving good image quality in the on-axis area of ​​the system. More specifically, the radius of curvature R10 of the image-side surface of the fifth lens, the radius of curvature R11 of the object-side surface of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 12.51<|R10-R11| / (CT5+T56+CT6)<21.99.

[0054] In an exemplary embodiment of the present application, the effective focal length f5 of the fifth lens, the air spacing T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the radius of curvature R9 of the object side surface of the fifth lens satisfy the following: 0.0 ≤ f5 × T45 / (CT5 × R9) ≤ 2.0. By controlling the air spacing between the fifth and sixth lenses on the optical axis and the center thickness of the sixth lens on the optical axis, the field curvature and distortion of the system can be reasonably controlled, maintaining image quality at the edge of the field within a reasonable range. More specifically, the effective focal length f5 of the fifth lens, the air spacing T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the radius of curvature R9 of the object side surface of the fifth lens satisfy the following: 0.01 ≤ f5 × T45 / (CT5 × R9) ≤ 1.99.

[0055] In an exemplary embodiment of the present application, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 9.0<|f5+f6| / (CT5+CT6)<17.0. By reasonably allocating optical power, high pixel, large aperture, and ultra-thin characteristics of the lens can be achieved. More specifically, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 9.01<|f5+f6| / (CT5+CT6)<16.99.

[0056] In an exemplary embodiment of the present application, the radius of curvature R13 of the object-side surface of the seventh lens, the radius of curvature R14 of the image-side surface of the seventh lens, the air spacing T67 between the sixth and seventh lenses on the optical axis, and the air spacing T78 between the seventh and eighth lenses on the optical axis all satisfy the following: 2.5 < (R13 - R14) / (T67 + T78) < 7.6. By controlling these conditions within a certain range, the shape of the seventh lens can be optimized, thereby ensuring the processing and molding characteristics of the seventh lens. Furthermore, the air spacing between the sixth and seventh lenses and the air spacing between the sixth and seventh lenses on the optical axis are controlled to be neither too small to meet assembly tolerances and prevent the lenses from colliding, nor too large to reduce the overall length of the system. More specifically, a curvature radius R13 of the object-side surface of the seventh lens, a curvature radius R14 of the image-side surface of the seventh lens, an air gap T67 on the optical axis between the sixth lens and the seventh lens, and an air gap T78 on the optical axis between the seventh lens and the eighth lens satisfy the following: 2.51<(R13-R14) / (T67+T78)<7.59.

[0057] In an exemplary embodiment of the present application, the optical axis air spacing T56 between the fifth and sixth lenses, as well as the optical axis air spacing T23 between the second and third lenses, satisfy the following: 1.5 < T56 / T23 < 3.0. By controlling these conditions within a certain range, the optical axis air spacing between the fifth and sixth lenses, and the optical axis air spacing between the second and third lenses, can be controlled to be moderate enough to meet assembly tolerances and prevent the lenses from colliding, yet moderate enough to reduce the overall length of the system. More specifically, the optical axis air spacing T56 between the fifth and sixth lenses, as well as the optical axis air spacing T23 between the second and third lenses, satisfy the following: 1.55 < T56 / T23 < 2.95.

[0058] In an exemplary embodiment of the present application, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the air gap T34 between the third and fourth lenses on the optical axis satisfy the following: 5.0 ≤ (CT3 + CT4) / T34 ≤ 6.0. By controlling the above conditional equation within a certain range, the thicknesses of the third and fourth lenses can be controlled within a reasonable range, thereby reducing the overall length of the system. More specifically, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the air gap T34 between the third and fourth lenses on the optical axis satisfy the following: 5.0 ≤ (CT3 + CT4) / T34 ≤ 6.0.

[0059] In this exemplary embodiment, the far optical surface and the near optical surface of any lens among the first lens E1 to the eighth lens E8 are aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0060]

[0061] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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); k is the conic coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0062] In this exemplary embodiment, the camera lens may further include an aperture. The aperture may be positioned appropriately as needed, for example, between the high beam and the first lens element. Optionally, the camera lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element on the imaging surface.

[0063] The camera lens according to the above-described embodiment of the present application can utilize multiple lens elements, such as the eight lens elements described above. By rationally allocating the optical power, surface shape, center thickness of each lens element, and the on-axis spacing between lenses, the camera lens can be made compact in size and volume, offering a wide imaging range and high imaging quality, while maintaining its ultra-thinness.

[0064] In an exemplary embodiment, at least one of the surfaces of each lens is an aspherical surface, that is, at least one of the surfaces from the far beam surface of the first lens to the near beam surface of the eighth lens is an aspherical surface. Aspherical lenses are characterized by a continuously changing curvature from the center to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have a better curvature radius characteristic, with the advantages of improving distortion and astigmatism. The use of aspherical lenses can minimize aberrations that occur during imaging, thereby improving imaging quality. Optionally, at least one of the far beam surface and the near beam surface of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses is an aspherical surface. Optionally, both the far beam surface and the near beam surface of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses are aspherical surfaces.

[0065] However, those skilled in the art will appreciate that the number of lenses comprising the imaging lens may be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although eight lenses are described as an example in the embodiments, the imaging lens is not limited to including eight lenses and may include other numbers of lenses if desired.

[0066] Specific embodiments of the camera lens applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specific embodiment 1

[0068] Figure 1 This is a structural schematic diagram of Example 1 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0069] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0070] Table 1 shows basic parameters of the camera lens of Example 1, wherein the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0071]

[0072]

[0073] Table 1

[0074] As shown in Table 2, in Example 1, the total effective focal length of the camera lens is f=4.71 mm, and half of the maximum field angle of the camera lens is semi-fov=45.00°.

[0075]

[0076] Table 2

[0077] The camera lens in Example 1 satisfies:

[0078] f / EDP=1.89, where f is the effective focal length of the camera lens, and EPD is the entrance pupil diameter of the camera lens.

[0079] Semi-FOV=45.0°, where Semi-FOV is half of the maximum field of view of the camera lens.

[0080] TD=5.80 mm, where TD is the on-axis distance from the object side of the first lens to the image side of the last lens.

[0081] f1×(R2-R1) / (T12+CT1)=32.81, where f1 is the effective focal length of the first lens, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, CT1 is the center thickness of the first lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0082] f3 / R5+CT3 / T34=-5.3, where f3 is the effective focal length of the third lens, R5 is the radius of curvature of the object side of the third lens, CT3 is the center thickness of the third lens on the optical axis, and T34 is the air spacing between the third and fourth lenses on the optical axis.

[0083] f4 / R7+f3 / R6=-10.94, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, R6 is the curvature radius of the image side of the third lens, and R7 is the curvature radius of the object side of the fourth lens.

[0084] V1 / f1+V2 / f2=9.80, where f1 is the effective focal length of the first lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and f2 is the effective focal length of the second lens.

[0085] V3 / f3+V4 / f4=-1.36, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, V3 is the Abbe number of the third lens, and V4 is the Abbe number of the fourth lens.

[0086] V7 / f7+V8 / f8=8.74, where f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens, V7 is the Abbe number of the seventh lens, and V8 is the Abbe number of the eighth lens.

[0087] T78 / CT8=4.32, where T78 is the air distance between the seventh lens and the eighth lens on the optical axis, and CT8 is the center thickness of the eighth lens on the optical axis.

[0088] |R10-R11| / (CT5+T56+CT6)=16.09, where R10 is the radius of curvature of the image-side surface of the fifth lens, R11 is the radius of curvature of the object-side surface of 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, and T56 is the air spacing between the fifth and sixth lenses on the optical axis.

[0089] f5×T45 / (CT5×R9)=1.54, where f5 is the effective focal length of the fifth lens, T45 is the air spacing between the fourth lens and the fifth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and R9 is the radius of curvature of the object side of the fifth lens.

[0090] |f5+f6| / (CT5+CT6)=16.51, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, 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.

[0091] (R13-R14) / (T67+T78)=10.09, where R13 is the radius of curvature of the object side surface of the seventh lens, R14 is the radius of curvature of the image side surface of the seventh lens, T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis.

[0092] T56 / T23=2.71, where T56 is the air distance between the fifth lens and the sixth lens on the optical axis, and T23 is the air distance between the second lens and the third lens on the optical axis.

[0093] (CT3+CT4) / T34=5.60, where CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

[0094] In Example 1, the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 3 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S16 that can be used in Example 1.

[0095] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.1026E-01 -2.7544E-02 -2.4964E-03 1.0773E-03 -1.2864E-05 4.6853E-05 -2.6679E-04 S2 -2.7630E-01 9.9129E-03 -1.1413E-02 -8.1985E-03 -1.9345E-03 -4.2494E-05 9.3900E-05 S3 -2.5856E-01 4.8000E-02 -1.1752E-02 -1.1179E-02 -1.2058E-03 5.7474E-04 9.2683E-05 S4 -4.0041E-01 3.8775E-02 -1.7272E-02 -7.4828E-03 2.5783E-03 8.0842E-04 -6.6603E-04 S5 9.1723E-02 -5.7444E-02 -2.7723E-02 -1.1847E-03 1.5694E-04 6.1581E-04 -4.4638E-04 S6 3.8254E-01 -1.1035E-01 -1.4143E-02 -6.6573E-04 -3.0588E-04 4.4980E-04 9.7899E-05 S7 -9.8497E-02 -1.4100E-02 4.4218E-03 -8.2055E-03 -1.3848E-03 -3.5628E-04 -2.1199E-05 S8 -1.8075E-01 4.5794E-02 3.7154E-03 -5.0601E-03 -1.6671E-03 -1.5691E-04 1.7969E-04 S9 -8.3582E-02 6.4824E-02 3.0190E-02 8.6634E-03 -1.3113E-03 -2.8944E-03 1.5962E-03 S10 3.1529E-03 4.0541E-02 2.4980E-02 6.6642E-03 1.2462E-03 -4.0098E-03 7.4229E-04 S11 -1.9347E-01 -4.2749E-02 8.8006E-03 1.0161E-02 2.6941E-03 -1.3082E-04 -8.6522E-04 S12 -7.6278E-01 1.8114E-01 1.0468E-02 2.2129E-02 3.5726E-03 1.2049E-03 -5.0099E-04 S13 -2.3105E+00 6.0630E-01 -1.6151E-01 -1.7999E-02 9.7601E-04 6.4171E-03 -5.9051E-03 S14 2.6953E+00 -3.6170E-01 1.6733E-01 -3.2688E-02 4.6010E-02 -2.4653E-02 4.5580E-03 S15 1.0012E+00 -5.0133E-02 -8.9577E-02 -1.1535E-01 3.4400E-03 -1.4545E-03 7.8060E-03 S16 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0096] Table 3

[0097] 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 ​​under different viewing angles. Figure 2d The chromatic aberration curve of the camera lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figures 2a to 2d As shown, the camera lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0099] Figure 3This is a structural schematic diagram of Example 2 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0100] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0101] Table 4 shows the basic parameters of the camera lens of Example 2, wherein the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0102]

[0103]

[0104] Table 4

[0105] In Example 2 of the present application, the parameters of each relational expression are the same as those explained in Example 1, except that the values ​​of each parameter are as follows:

[0106] Listed in Table 5.

[0107]

[0108] Table 5

[0109] In Example 2, the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S16 that can be used in Example 2.

[0110] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.6718E-02 -9.2620E-03 -4.5149E-04 1.1704E-04 1.8824E-04 -2.9144E-05 2.8838E-05 S2 -1.5479E-01 1.0215E-02 3.0819E-03 4.5986E-04 -3.0867E-04 -1.3741E-04 -7.2018E-05 S3 -1.6111E-01 1.6984E-02 6.4731E-03 1.2293E-04 -4.2336E-04 -7.4840E-05 2.2964E-05 S4 -2.1086E-01 1.2174E-02 3.8579E-03 -2.5185E-04 3.0331E-04 2.8234E-04 4.2232E-06 S5 7.5270E-02 4.5043E-03 -7.3943E-03 2.3658E-03 -1.6105E-04 -5.4734E-06 -1.4037E-04 S6 2.7478E-01 -2.7911E-02 -5.4114E-03 2.1500E-03 -6.9184E-04 -5.7720E-04 -1.7323E-05 S7 -7.0278E-02 -1.5383E-02 1.1133E-02 -2.4455E-03 -7.8148E-04 -7.0683E-04 3.5728E-05 S8 -1.4362E-01 1.2009E-02 8.3619E-03 -1.1302E-03 -3.0179E-04 -5.3731E-04 9.7888E-05 S9 -5.6149E-02 -4.0206E-04 -2.9264E-03 -5.8847E-04 1.1305E-03 7.4865E-05 1.2208E-04 S10 -3.2235E-02 -8.2717E-03 -1.7855E-03 -7.6289E-04 2.2400E-03 5.4676E-04 4.0073E-04 S11 -5.9053E-02 -2.1284E-02 -3.5045E-03 -1.1251E-03 2.6388E-03 4.1191E-04 4.6510E-04 S12 -5.9462E-01 9.0211E-02 -7.6212E-03 -3.4254E-03 6.1679E-04 -1.4223E-03 -1.3467E-04 S13 -1.1364E+00 1.4711E-01 -7.0477E-03 8.1433E-04 -4.5702E-03 1.7361E-03 1.6215E-03 S14 9.5228E-01 -1.4404E-01 5.3048E-02 -1.2109E-02 -3.2925E-03 2.2995E-03 9.1180E-05 S15 6.3257E-01 -1.9828E-02 3.8676E-02 -2.3874E-02 8.1697E-03 -5.7838E-03 -7.1023E-04 S16 -7.1405E-01 -2.0986E-01 2.7047E-02 -3.7089E-02 1.5249E-02 -9.6830E-03 2.3411E-04

[0111] Table 6

[0112] 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 4b The 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 value under different viewing angles. 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 camera lens. Figures 4a to 4d As shown, the camera lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0114] Figure 5 This is a structural schematic diagram of Example 3 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0115] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0116] Table 7 shows the basic parameters of the camera lens of Example 3, wherein the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0117]

[0118] Table 7

[0119] In Example 3 of the present application, the parameters of each relational expression are the same as those explained in Example 1, except that the values ​​of each parameter are as follows:

[0120] Listed in Table 8.

[0121]

[0122] Table 8

[0123] In Example 3, both the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 9 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S16 that can be used in Example 3.

[0124] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.7975E-02 -9.8039E-03 1.0123E-03 -1.1240E-04 1.7702E-04 -1.0823E-04 2.1477E-05 S2 -1.5959E-01 1.7447E-02 6.4453E-03 -1.3500E-03 -3.5242E-04 -4.1502E-04 -9.5132E-05 S3 -1.7187E-01 2.9561E-02 6.4338E-03 -2.0745E-03 -7.1512E-04 -2.4806E-04 -1.7154E-04 S4 -2.3240E-01 1.9305E-02 6.3083E-04 -2.3900E-03 -2.9861E-04 -5.5300E-04 -1.2488E-04 S5 8.9321E-02 1.3731E-03 -5.1745E-03 9.7242E-04 -1.5386E-03 -1.3966E-04 -5.1066E-05 S6 2.9951E-01 -3.4529E-02 2.6449E-03 7.6775E-04 -2.3683E-03 4.4837E-04 1.0162E-04 S7 -9.7776E-02 -1.7038E-02 1.6608E-02 -3.6331E-03 -2.4960E-03 6.9712E-04 3.2670E-04 S8 -1.7132E-01 1.4414E-02 9.6611E-03 -1.3643E-03 -1.3547E-03 6.8450E-04 3.3634E-04 S9 -4.9718E-02 2.5525E-03 -4.3824E-03 1.5050E-03 1.0130E-03 -5.0998E-04 1.8297E-04 S10 -3.6785E-02 -4.0272E-03 -1.0554E-02 -1.0635E-03 1.9890E-03 -3.2632E-04 -3.6458E-04 S11 -2.9710E-02 -2.8625E-02 -4.2683E-03 -7.4366E-03 -6.8273E-04 -5.6942E-04 4.1644E-04 S12 -6.3249E-01 1.0861E-01 6.4684E-03 1.8831E-03 1.8810E-03 2.8978E-04 1.1776E-03 S13 -1.3093E+00 1.3126E-01 4.8958E-02 2.8480E-02 -1.1379E-02 -7.2418E-03 -1.7724E-03 S14 9.0659E-01 -1.6552E-01 5.7913E-02 -9.2577E-04 -9.9147E-03 6.3283E-03 -1.0726E-04 S15 8.5492E-01 2.9941E-02 -6.4188E-03 -3.0340E-02 1.1421E-02 -2.3940E-03 -1.2096E-03 S16 -5.6691E-01 -7.9114E-02 7.6996E-02 -4.1098E-02 1.2463E-02 -7.9236E-03 3.1241E-03

[0125] Table 9

[0126] 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 value under different viewing angles. Figure 6d The chromatic aberration curve of the camera lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figures 6a to 6d As shown, the camera lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0128] Figure 7 This is a structural schematic diagram of Example 4 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0129] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0130] Table 10 shows basic parameters of the camera lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0131]

[0132] Table 10

[0133] In Example 4 of the present application, the parameters of each relational expression are the same as those explained in Example 1, except that the values ​​of each parameter are as follows:

[0134] Listed in Table 11.

[0135]

[0136] Table 11

[0137] In Example 4, both the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 12 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S16 that can be used in Example 4.

[0138] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.2673E-02 -4.7451E-03 -5.8277E-04 4.9556E-04 -1.0878E-04 3.6566E-05 -9.0286E-05 S2 -1.3630E-01 7.6197E-03 1.7442E-03 3.6786E-04 -1.1624E-03 -3.8283E-04 -3.8943E-04 S3 -1.6625E-01 1.2225E-02 3.0946E-03 2.9030E-04 -1.9243E-03 -6.2762E-04 -5.1224E-04 S4 -2.0388E-01 1.6167E-02 3.1092E-03 -3.1165E-03 -2.7200E-03 -6.6075E-04 -1.7276E-04 S5 9.4491E-02 1.9748E-02 -6.0286E-03 1.2588E-03 -1.9662E-03 7.2328E-04 -9.8856E-05 S6 2.7355E-01 -1.8092E-02 -5.0267E-03 2.5195E-03 -9.9446E-04 1.1252E-03 -1.1220E-04 S7 -6.9986E-02 -2.1602E-02 8.0219E-03 -1.0837E-03 -2.3193E-03 2.4081E-04 2.3283E-04 S8 -1.5112E-01 1.3232E-02 8.0842E-03 9.7499E-04 -1.2672E-03 -2.9045E-04 3.4442E-04 S9 -6.0674E-02 -3.8033E-04 8.4870E-04 -4.3618E-03 2.7460E-03 -7.2529E-04 1.5155E-04 S10 -3.3568E-02 -2.3887E-03 1.8311E-03 -4.8798E-03 1.4663E-03 5.2752E-04 -2.5908E-04 S11 -5.6593E-02 -3.6300E-02 -4.0565E-03 1.7603E-03 9.3635E-04 -3.1984E-04 5.2335E-04 S12 -5.8616E-01 9.9419E-02 -1.0103E-02 2.2967E-03 1.3597E-03 -8.0772E-04 8.7673E-04 S13 -1.0258E+00 7.7783E-02 4.6975E-03 2.1487E-03 -6.1483E-06 5.9296E-04 4.4939E-04 S14 7.6971E-01 -1.9907E-01 5.3753E-02 -7.3475E-03 -5.5078E-03 -1.6294E-03 -2.8730E-03 S15 1.1225E+00 -3.7404E-03 1.4603E-02 -1.8833E-02 -1.5751E-02 1.2310E-05 -2.2865E-03 S16 -1.1685E-01 -1.3592E-01 1.5686E-01 -6.8693E-03 -1.4445E-03 -1.0953E-02 -1.4669E-03

[0139] Table 12

[0140] 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 8b The 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 value under different viewing angles. Figure 8dThe chromatic aberration curve of the camera lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figures 8a to 8d As shown, the camera lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0142] Figure 9 This is a structural schematic diagram of Example 5 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0143] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being concave. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0144] Table 13 shows basic parameters of the camera lens of Example 5, wherein the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0145]

[0146] Table 13

[0147] In Example 5 of the present application, the parameters of each relational expression are the same as those explained in Example 1, except that the values ​​of each parameter are as follows:

[0148] Listed in Table 14.

[0149]

[0150] Table 14

[0151] In Example 5, both the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 15 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S16 that can be used in Example 5.

[0152]

[0153]

[0154] Table 15

[0155] 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 back of 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 value under different viewing angles. Figure 10d The chromatic aberration curve of the camera lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figures 10a to 10d As shown, the camera lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0157] Figure 11 This is a structural schematic diagram of Example 6 of the camera lens of the present application. The camera lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9 and an imaging surface S19.

[0158] The first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S1 being concave; the second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being concave; the third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex; the fourth lens E4 has negative focal power, with its object-side surface S7 being convex and its image-side surface S8 being concave; the fifth lens E5 has positive focal power, with its object-side surface S9 being convex and its image-side surface S10 being concave; the sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave; the seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being convex; and the eighth lens E8 has negative focal power, with its object-side surface S15 being concave and its image-side surface S16 being convex. Light from an object passes through surfaces S1 to S18 in sequence and is finally imaged on S19.

[0159] Table 16 shows the basic parameters of the camera lens of Example 6, where the units of the curvature radius, thickness, and focal length are all in millimeters (mm).

[0160]

[0161] Table 16

[0162] In Example 6 of the present application, the parameters of each relational expression are the same as those explained in Example 1, except that the values ​​of each parameter are as follows:

[0163] Listed in Table 17.

[0164]

[0165] Table 17

[0166] In Example 6, both the outer and inner side surfaces of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. Table 18 shows the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical mirror surfaces S1 to S18 that can be used in Example 6.

[0167]

[0168]

[0169] Table 18

[0170] Figure 12a The 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 value under different viewing angles. Figure 12d The chromatic aberration curve of the camera lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the camera lens. Figures 12a to 12d As shown, the camera lens provided in Example 6 can achieve good imaging quality.

[0171] In summary, in Examples 1-6 of the present application, each conditional formula satisfies the conditions shown in Table 19 below.

[0172] Conditional formula / Example 1 2 3 4 5 6 f / EDP 1.89 1.89 1.80 1.89 1.70 1.89 Semi-FOV(°) 45.0 43.7 43.7 45.0 45.0 45.0 TD(mm) 5.80 5.74 5.73 5.66 5.80 5.79 f1×(R2-R1) / (T12+CT1) 32.82 36.41 34.50 27.40 31.15 28.67 f3 / R5+CT3 / T34 -5.37 -9.78 -15.92 -5.88 -24.02 -6.02 f4 / R7+f3 / R6 -10.94 -14.62 -20.46 -11.36 -28.93 -10.82 V1 / f1+V2 / f2 9.80 10.48 11.07 10.39 10.53 10.52 V3 / f3+V4 / f4 -1.36 -2.15 -2.66 -1.56 -1.82 -1.99 V7 / f7+V8 / f8 8.75 2.41 0.06 4.97 -1.63 5.12 T78 / CT8 4.32 3.94 4.16 5.65 4.48 4.23 |R10-R11| / (CT5+T56+CT6) 16.09 15.25 21.60 14.54 21.84 13.00 f5×T45 / (CT5×R9) 1.54 1.68 0.42 0.24 0.67 0.27 |f5+f6| / (CT5+CT6) 16.50 10.20 5.85 15.51 7.10 10.28 (R13-R14) / (T67+T78) 5.20 5.44 7.50 5.73 5.83 5.67 T56 / T23 2.71 1.70 2.31 1.93 1.76 1.91 (CT3+CT4) / T34 5.60 5.00 5.46 5.50 6.00 5.19

[0173] Table 28

[0174] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, improvements, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A camera lens, characterized in that: The number of lenses with optical power in the camera lens is eight, and the eight lenses include, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, its object-side surface is convex and its image-side surface is concave; a second lens having positive refractive power, with a convex object-side surface and a concave image-side surface; The third lens has positive optical power, its object-side surface is concave and its image-side surface is convex; a fourth lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; a fifth lens element having positive optical power, whose object-side surface is convex and whose image-side surface is concave; a sixth lens element having negative optical power, whose object-side surface and image-side surface are concave; The seventh lens element has positive refractive power, and its object-side surface is convex and its image-side surface is convex; an eighth lens element having negative optical power and a concave object-side surface; The effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens satisfy the following conditions: 1.70≤f / EDP≤1.89; Wherein, half of the maximum field of view angle of the camera lens, Semi-FOV, satisfies: 43.7°≤Semi-FOV≤45°; The on-axis distance TD from the object side of the first lens to the image side of the last lens satisfies the following: 5.66 mm ≤ TD ≤ 5.8 mm; The effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens, the curvature radius R2 of the image side surface of the first lens, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 27.4 mm ≤ f1 × (R2 - R1) / (T12 + CT1) ≤ 36.41 mm.

2. The imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, the curvature radius R5 of the object side of the third lens, the center thickness CT3 of 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 the following: 24.31≤f3≤81.5; -24.02≤f3 / R5+CT3 / T34≤-5.

37.

3. The camera lens according to claim 1, wherein: The effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the curvature radius R6 of the image side surface of the third lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -28.93≤f4 / R7+f3 / R6≤-10.

82.

4. The imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the effective focal length f2 of the second lens satisfy: 9.80 mm -1 ≤V1 / f1+V2 / f2≤11.07mm -1 .

5. The imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the Abbe number V3 of the third lens, and the Abbe number V4 of the fourth lens satisfy: -2.66 mm -1 ≤V3 / f3+V4 / f4≤-1.36mm -1 .

6. The camera lens according to claim 1, wherein: The effective focal length f7 of the seventh lens, the effective focal length f8 of the eighth lens, the Abbe number V7 of the seventh lens, and the Abbe number V8 of the eighth lens satisfy: -1.63 mm -1 ≤V7 / f7+V8 / f8≤8.75mm -1 .

7. The imaging lens according to claim 1, wherein: An air interval T78 between the seventh lens and the eighth lens on the optical axis, and a center thickness CT8 of the eighth lens on the optical axis satisfy the following conditions: 3.94≤T78 / CT8≤5.

65.

8. The imaging lens according to claim 1, wherein: A curvature radius R10 of the image-side surface of the fifth lens, a curvature radius R11 of the object-side surface of the sixth lens, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and an air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 13.00≤|R10-R11| / (CT5+T56+CT6)≤21.

84.

9. The imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the curvature radius R9 of the object side of the fifth lens satisfy the following: 0.24≤f5×T45 / (CT5×R9)≤1.

68.

10. The imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy the following: 5.85≤|f5+f6| / (CT5+CT6)≤16.

50.

11. The imaging lens according to any one of claims 1 to 10, wherein: A curvature radius R13 of the object side surface of the seventh lens, a curvature radius R14 of the image side surface of the seventh lens, an air gap T67 between the sixth lens and the seventh lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 5.20≤(R13-R14) / (T67+T78)≤7.

50.

12. The imaging lens according to any one of claims 1 to 10, wherein: An air interval T56 between the fifth lens and the sixth lens on the optical axis, and an air interval T23 between the second lens and the third lens on the optical axis satisfy the following: 1.70≤T56 / T23≤2.

71.

13. The imaging lens according to any one of claims 1 to 10, wherein: A center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and an air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following ratio: 5.00≤(CT3+CT4) / T34≤6.00.

Images