Camera lens

Abstract

The application discloses a camera lens, which comprises a lens barrel, a lens group and a plurality of light shielding elements. The lens group comprises first to eighth lenses arranged in sequence from the object side to the image side along the optical axis, wherein the eighth lens is a composite lens with one side being a plane. The plurality of light shielding elements comprises first to sixth light shielding elements arranged between each adjacent lens in the first to seventh lenses in sequence, and each light shielding element is in contact with the lens adjacent to the object side. The maximum length L of the lens barrel along the optical axis direction, the distance T78 from the image side surface of the seventh lens to the object side surface of the eighth lens along the optical axis, and the center thickness CT8 of the eighth lens on the optical axis satisfy the condition formula 2 < L / (T78+CT8) < 6.

Description

Technical Field

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

[0002] With the continuous upgrading and development of consumer electronics products such as mobile phones, people's requirements for electronic product photography are constantly increasing. At the same time, the industry is also placing increasingly higher demands on camera lenses. It is well known that larger sensors are more conducive to obtaining high-quality imaging results because they can effectively improve light sensitivity, reduce image noise, and clearly present details in both highlights and shadows within a high dynamic range. Therefore, in order to achieve better image quality, mobile phone manufacturers are constantly increasing the size of the "sensor," that is, increasing the size of the image sensor chip that serves as the imaging medium. However, the application of larger sensors also brings problems such as increased lens size and weight.

[0003] Taking an eight-element lens as an example, in order to accommodate a larger sensor, the size of the lens will increase exponentially, making it difficult to meet the design requirements of miniaturization and thinness. Furthermore, the eighth lens included in the lens module often suffers from poor processability and unreliable yield. There are also issues such as poor assembly stability of the seventh and eighth lenses with the lens barrel, which makes it difficult to improve the image quality and yield of the lens.

[0004] Therefore, in response to this situation, how to effectively improve the manufacturability and yield of the eighth lens through design optimization, shorten the lens size and achieve miniaturization, and at the same time improve the stability of the module, thereby effectively improving the lens quality and yield, has become one of the technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a camera lens, which may include a lens barrel, a lens group, and a plurality of light-shielding elements. The lens group includes 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 arranged sequentially along the optical axis from the object side to the image side, wherein the eighth lens is a composite lens with one side being flat. The plurality of light-shielding elements include: a first light-shielding element located between the first lens and the second lens and in contact with the image-side surface of the first lens; a second light-shielding element located between the second lens and the third lens and in contact with the image-side surface of the second lens; a third light-shielding element located between the third lens and the fourth lens and in contact with the image-side surface of the third lens; a fourth light-shielding element located between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens; a fifth light-shielding element located between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens; and a sixth light-shielding element located between the sixth lens and the seventh lens and in contact with the image-side surface of the sixth lens. The maximum length L of the lens barrel along the optical axis, the distance T78 from the image side of the seventh lens to the object side of the eighth lens along the optical axis, and the center thickness CT8 of the eighth lens on the optical axis can satisfy: 2 <L / (T78+CT8)<6。

[0006] In one embodiment, the center thickness CT6 of the sixth lens on the optical axis, the distance EP56 from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element along the optical axis, and the refractive index N6 of the sixth lens can satisfy: 0 <CT6 / EP56×N6<3。

[0007] In one embodiment, the sum of the center thicknesses of the lenses from the first lens to the eighth lens along the optical axis, ∑CT, and the sum of the thicknesses of the light-shielding elements from the first light-shielding element to the sixth light-shielding element along the optical axis, ∑CP, can satisfy: 5 < ∑CT / ∑CP < 40.

[0008] In one embodiment, the distance from the object-side end face of the lens barrel to the object-side surface of the first light-shielding element along the optical axis, the sum of the distances ∑EP between adjacent light-shielding elements from the first light-shielding element to the sixth light-shielding element along the optical axis, the sum of the thicknesses ∑CP of each light-shielding element from the first light-shielding element to the sixth light-shielding element along the optical axis, and the aperture value fno of the camera lens can satisfy: 0 < ∑EP / ∑CP / fno < 20.

[0009] In one embodiment, the radius of curvature R8 of the image-side surface of the fourth lens, the minimum inner diameter d4s of the object-side surface of the fourth light-shielding element, the radius of curvature R9 of the object-side surface of the fifth lens, and the minimum inner diameter d4m of the image-side surface of the fourth light-shielding element can satisfy: -10 <R8 / d4s+R9 / d4m<5。

[0010] In one embodiment, the effective focal length f5 of the fifth lens, the maximum outer diameter D4m of the image-side surface of the fourth light-shielding element, and the minimum inner diameter d4m of the image-side surface of the fourth light-shielding element can satisfy: -20 <f5 / (D4m-d4m)<10。

[0011] In one embodiment, the effective focal length f1 of the first lens, the minimum inner diameter d1s of the object side surface of the first light-shielding element, the effective focal length f2 of the second lens, and the minimum inner diameter d2s of the object side surface of the second light-shielding element can satisfy: 0 <f1 / d1s-f2 / d2s<10。

[0012] In one embodiment, the effective focal length f of the camera lens, the maximum outer diameter D0s of the object-side end face of the lens barrel, and the minimum inner diameter d0s of the object-side end face of the lens barrel can satisfy: 0 <f / (D0s-d0s)<10。

[0013] In one embodiment, the effective focal length f of the camera lens, the distance TTL from the object-side surface of the first lens to the imaging surface of the camera lens along the optical axis, and the maximum length L of the lens barrel along the optical axis can satisfy: 2 <f / (TTL-L)<8。

[0014] In one embodiment, the minimum inner diameter d5m of the image-side surface of the fifth light-shielding element, the radius of curvature R11 of the object-side surface of the sixth lens, the minimum inner diameter d5s of the object-side surface of the fifth light-shielding element, and the radius of curvature R10 of the image-side surface of the fifth lens can satisfy: -2 <d5m / R11+d5s / R10<5。

[0015] In one embodiment, the plurality of light-shielding elements may further include a fourth auxiliary light-shielding element located on the image side of the fourth light-shielding element and in contact with the image side portion of the fourth light-shielding element.

[0016] In one embodiment, the plurality of light-shielding elements may further include a fifth auxiliary light-shielding element located on the image side of the fifth light-shielding element and in contact with the image side surface portion of the fifth light-shielding element.

[0017] In one embodiment, the plurality of light-shielding elements may further include a sixth auxiliary light-shielding element located on the image side of the sixth light-shielding element and in contact with the image side portion of the sixth light-shielding element.

[0018] In one embodiment, the eighth lens comprises a material with an infrared cut-off filtering function, so that the eighth lens has the function of infrared cut-off filtering.

[0019] In one embodiment, the image side of the eighth lens has an infrared cut-off layer, so that the eighth lens has the function of infrared cut-off filtering.

[0020] In one embodiment, the eighth lens is a compound lens including an aspherical lens part and a substrate part made of glass material.

[0021] In one embodiment, the material of the aspherical lens part is a deformable material under force.

[0022] In one embodiment, the material of the aspherical lens part is plastic or glue.

[0023] In one embodiment, the shape of the aspherical lens part is formed by pasting the material of the aspherical lens part onto the substrate part made of glass material and then embossing.

[0024] The camera lens provided in this application includes a lens barrel, an eight-piece imaging lens group and a plurality of light shielding elements. The first to eighth lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the eighth lens is a compound lens with one side being planar; the plurality of light shielding elements include the first to sixth light shielding elements sequentially arranged between adjacent lenses among the first to seventh lenses, and each light shielding element is in contact with the lens adjacent to its object side; at the same time, it is controlled that the maximum length L of the lens barrel along the optical axis direction, the distance T78 along the optical axis from the image side of the seventh lens to the object side of the eighth lens, and the central thickness CT8 of the eighth lens on the optical axis satisfy the conditional formula 2 < L / (T78 + CT8) < 6. Through this setting of the camera lens in this application, the thickness of the eighth lens can be reasonably controlled, which helps the process forming of the eighth lens and can improve the yield rate of the eighth lens; and it can ensure the certainty of the setting form of the seventh lens and the eighth lens in the lens barrel, which helps to improve the fixing stability at the lens module end and helps to improve the lens yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Combined with the drawings, through the following detailed description of non-restrictive embodiments, other features, purposes and advantages of this application will become more obvious. In the drawings:

[0026] Figure 1 The structure and partial parameter schematic diagram of the camera lens according to an exemplary embodiment of this application are shown;

[0027] Figures 2 to 4 The structural schematic diagrams of the camera lens according to Embodiment 1 of this application under three embodiments are respectively shown;

[0028] Figures 5 to 8 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve of the camera lens of Embodiment 1 are shown respectively.

[0029] Figures 9 to 11 Schematic diagrams of the camera lens according to Embodiment 2 of this application are shown in three different implementations.

[0030] Figures 12 to 15 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve of the camera lens in Example 2 are shown respectively.

[0031] Figures 16 to 18 Schematic diagrams of the camera lens according to Embodiment 3 of this application are shown in three different implementations.

[0032] Figures 19 to 22 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve of the camera lens in Example 3 are shown respectively.

[0033] Figures 23 to 25 Schematic diagrams of the camera lens according to Embodiment 4 of this application are shown in three different embodiments; and

[0034] Figures 26 to 29 The on-axis chromatic aberration curve, magnification chromatic aberration curve, astigmatism curve, and distortion curve of the camera lens of Example 4 are shown respectively. Detailed Implementation

[0035] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

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

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

[0038] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, 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. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0039] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0043] The camera lens according to an exemplary embodiment of the present application may include a lens barrel, a lens group, and a plurality of light-shielding elements. The lens group may be an eight-piece lens group, including 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 arranged in order from the object side to the image side along the optical axis. Among them, the eighth lens may be a compound lens with one side being a flat surface, and one of its object side surface and image side surface may be a flat surface.

[0044] In the exemplary embodiment, the plurality of light-shielding elements may include: a first light-shielding element located between the first lens and the second lens and partially contacting the image side surface of the first lens; a second light-shielding element located between the second lens and the third lens and partially contacting the image side surface of the second lens; a third light-shielding element located between the third lens and the fourth lens and partially contacting the image side surface of the third lens; a fourth light-shielding element located between the fourth lens and the fifth lens and partially contacting the image side surface of the fourth lens; a fifth light-shielding element located between the fifth lens and the sixth lens and partially contacting the image side surface of the fifth lens; and a sixth light-shielding element located between the sixth lens and the seventh lens and partially contacting the image side surface of the sixth lens.

[0045] In the exemplary embodiment, at least some of the lenses of the lens group and the plurality of light-shielding elements may be assembled in the lens barrel. For example, the first lens to the seventh lens and the first light-shielding element to the sixth light-shielding element may be assembled in the lens barrel.

[0046] In the exemplary embodiment, the camera lens of the present application may satisfy the condition 2 < L / (T78 + CT8) < 6, where L is the maximum length of the lens barrel along the optical axis direction, that is, the distance along the optical axis from the object side end surface (the surface closest to the object side) of the lens barrel to the image side end surface (the surface closest to the image side) of the lens barrel, T78 is the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the eighth lens, and CT8 is the central thickness of the eighth lens on the optical axis. By controlling the ratio of the maximum length of the lens barrel along the optical axis direction to the sum of the distance along the optical axis from the image side surface of the seventh lens to the object side surface of the eighth lens and the central thickness of the eighth lens on the optical axis within this range, the thickness of the eighth lens can be reasonably controlled, which helps the process forming of the eighth lens and improves the yield rate of the eighth lens; and the fixing forms of the seventh lens and the eighth lens in the lens barrel can be confirmed, which helps to improve the fixing stability.

[0047] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0 < CT6 / EP56 × N6 < 3, where CT6 is the central thickness of the sixth lens on the optical axis, EP56 is the distance along the optical axis from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and N6 is the refractive index of the sixth lens. By controlling the central thickness of the sixth lens on the optical axis, the distance along the optical axis from the image side of the fifth light-shielding element to the object side of the sixth light-shielding element, and the refractive index of the sixth lens to satisfy the conditional formula 0 < CT6 / EP56 × N6 < 3, it helps to reasonably control the central thickness of the sixth lens, ensure the uniformity of the thickness of the sixth lens, contribute to the molding of the lens, and improve the molding yield of the lens.

[0048] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 5 < ∑CT / ∑CP < 40, where ∑CT is the sum of the central thicknesses of each lens from the first lens to the eighth lens on the optical axis, and ∑CP is the sum of the thicknesses of each light-shielding element from the first light-shielding element to the sixth light-shielding element along the optical axis. By controlling the ratio of the sum of the central thicknesses of each lens from the first lens to the eighth lens on the optical axis to the sum of the thicknesses of each light-shielding element from the first light-shielding element to the sixth light-shielding element along the optical axis within this range, it helps to control the total thickness of the lens, control the length of the lens barrel, thereby compress the length of the lens, reduce the volume of the lens, and contribute to the miniaturization of the module.

[0049] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0 < ∑EP / ∑CP / fno < 20, where ∑EP is the sum of the distance along the optical axis from the object-side end face of the lens barrel to the object side of the first light-shielding element and the distances along the optical axis between each adjacent two light-shielding elements from the first light-shielding element to the sixth light-shielding element, that is, the sum of EP01, EP12, EP23, EP34, EP45, and EP56, ∑CP is the sum of the thicknesses of each light-shielding element from the first light-shielding element to the sixth light-shielding element along the optical axis, and fno is the aperture value of the camera lens. By controlling the sum of the distance along the optical axis from the object-side end face of the lens barrel to the object side of the first light-shielding element and the distances along the optical axis between each adjacent two light-shielding elements from the first light-shielding element to the sixth light-shielding element, the sum of the thicknesses of each light-shielding element from the first light-shielding element to the sixth light-shielding element along the optical axis, and the aperture value of the camera lens to satisfy the conditional formula 0 < ∑EP / ∑CP / fno < 20, it is possible to compress the overall length of the lens, contribute to the thinness and lightness of the lens; at the same time, it helps to control the aperture of the lens, ensure sufficient light input, improve the imaging quality of the lens, and also contribute to improving the relative illumination of the lens.

[0050] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula -10 < R8 / d4s + R9 / d4m < 5, where R8 is the radius of curvature of the image side of the fourth lens, d4s is the minimum inner diameter of the object side of the fourth light-shielding element, R9 is the radius of curvature of the object side of the fifth lens, and d4m is the minimum inner diameter of the image side of the fourth light-shielding element. By controlling the sum of the ratio of the radius of curvature of the image side of the fourth lens to the minimum inner diameter of the object side of the fourth light-shielding element and the ratio of the radius of curvature of the object side of the fifth lens to the minimum inner diameter of the image side of the fourth light-shielding element within this range, the deflection direction of light can be effectively controlled, the excess light in the outer field of view can be intercepted, the imaging quality of the lens can be improved, the stray light risk of the lens can be effectively controlled, and at the same time, the shapes of the fourth lens and the fifth lens can be reasonably controlled, which helps the process forming of the fourth lens and the fifth lens.

[0051] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula -20 < f5 / (D4m - d4m) < 10, where f5 is the effective focal length of the fifth lens, D4m is the maximum outer diameter of the image side of the fourth light-shielding element, and d4m is the minimum inner diameter of the image side of the fourth light-shielding element. By controlling the ratio of the effective focal length of the fifth lens to the difference between the maximum outer diameter of the image side of the fourth light-shielding element and the minimum inner diameter of the image side of the fourth light-shielding element within this range, the processing feasibility of the fourth light-shielding element can be effectively ensured, and it can be ensured that the fourth light-shielding element can block the excess light, improve the stray light generated by the third lens, and improve the imaging quality; at the same time, it can avoid the focal length of the fifth lens being too small, reasonably control the focal length of the fifth lens, ensure the miniaturization of the optical system, and help to realize the thin and light of the lens.

[0052] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0 < f1 / d1s - f2 / d2s < 10, where f1 is the effective focal length of the first lens, d1s is the minimum inner diameter of the object side of the first light-shielding element, f2 is the effective focal length of the second lens, and d2s is the minimum inner diameter of the object side of the second light-shielding element. By controlling the difference between the ratio of the effective focal length of the first lens to the minimum inner diameter of the object side of the first light-shielding element and the ratio of the effective focal length of the second lens to the minimum inner diameter of the object side of the second light-shielding element within this range, while effectively controlling the light transmission amount of the lens, it can also block the excess light, improve the stray light generated by the second lens, improve the quality of the lens, and effectively control the focal lengths of the first lens and the second lens to ensure that their focal lengths are not too short, and at the same time, the lens can have a larger field of view.

[0053] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 0 < f / (D0s - d0s) < 10, where f is the effective focal length of the camera lens, D0s is the maximum outer diameter of the object-side end face of the lens barrel, and d0s is the minimum inner diameter of the object-side end face of the lens barrel. By controlling the ratio of the effective focal length of the camera lens to the difference between the maximum outer diameter of the object-side end face of the lens barrel and the minimum inner diameter of the object-side end face of the lens barrel within this range, the wall thickness of the lens barrel can be effectively controlled, which helps with the process forming of the lens barrel, enables the object-side end of the lens barrel to have a reasonable thickness, thus facilitating the assembly stability of the subsequent lenses and contributing to improving the assembly yield of the lens.

[0054] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula 2 < f / (TTL - L) < 8, where f is the effective focal length of the camera lens, TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the camera lens, and L is the maximum length of the lens barrel along the optical axis. By controlling the ratio of the effective focal length of the camera lens to the difference between the distance along the optical axis from the object side surface of the first lens to the imaging surface of the camera lens and the maximum length of the lens barrel along the optical axis within this range, the overall optical length of the lens and the maximum length of the lens barrel can be effectively controlled, which is beneficial for achieving the thinness and lightness of the lens, enables flexible adaptation to more modules, makes the lens have stronger promotion ability, and helps with the miniaturization of the module, allowing for a lightweight design.

[0055] In an exemplary embodiment, the camera lens of the present application can satisfy the conditional formula -2 < d5m / R11 + d5s / R10 < 5, where d5m is the minimum inner diameter of the image side surface of the fifth light shielding element, R11 is the curvature radius of the object side surface of the sixth lens, d5s is the minimum inner diameter of the object side surface of the fifth light shielding element, and R10 is the curvature radius of the image side surface of the fifth lens. By controlling the sum of the ratio of the minimum inner diameter of the image side surface of the fifth light shielding element to the curvature radius of the object side surface of the sixth lens and the ratio of the minimum inner diameter of the object side surface of the fifth light shielding element to the curvature radius of the image side surface of the fifth lens within this range, the effective diameter shapes of the fifth lens and the sixth lens can be effectively controlled, which helps with the forming of the lenses, improves the forming yield of the lenses, and at the same time can control the deflection direction of light, effectively improving the stray light of the lens and ensuring the imaging quality of the lens.

[0056] In an exemplary embodiment, the plurality of light shielding elements may further include a fourth auxiliary light shielding element located on the image side of the fourth light shielding element and in partial contact with or resting on the image side surface of the fourth light shielding element. The setting of the fourth auxiliary light shielding element can achieve a large step transition between the fourth lens and the fifth lens, realize stable structural support, and improve the assembly stability of the lens.

[0057] In an exemplary embodiment, the plurality of light-shielding elements may further include a fifth auxiliary light-shielding element located on the image side of the fifth light-shielding element and in contact with or resting on the image side surface of the fifth light-shielding element. The provision of the fifth auxiliary light-shielding element can achieve a large step transition between the fifth lens and the sixth lens, achieve stable support of the structure, and improve the assembly stability of the lens.

[0058] In an exemplary embodiment, the plurality of light-shielding elements may further include a sixth auxiliary light-shielding element located on the image side of the sixth light-shielding element and partially in contact with or abutting the image side of the sixth light-shielding element. The arrangement of the sixth auxiliary light-shielding element can achieve a large step transition between the sixth lens and the seventh lens, achieve stable support of the structure, and improve the assembly stability of the lens.

[0059] In an exemplary embodiment, the eighth lens may incorporate a material with infrared cutoff filtering functionality to achieve this function. In other words, the eighth lens can function as an infrared cutoff filter due to its lens material. Exemplarily, the eighth lens may be a composite lens formed by bonding an infrared filter with materials such as adhesive, still possessing infrared filtering functionality. It exhibits a transmittance of 50% in the wavelength range of 380nm to 430nm, a transmittance of over 80% in the wavelength range of 500nm to 600nm, and a transmittance of less than 10% in the wavelength range of 730nm to 800nm. It can send visible light into the ISP for image post-processing. Because it has infrared cutoff filtering functionality, infrared light is prevented from participating in the ISP calculations, thus not affecting the calculation results.

[0060] In an exemplary embodiment, the image-side surface of the eighth lens may have an infrared cutoff layer to enable the eighth lens to perform infrared cutoff filtering. Generally speaking, mobile phone lenses need to filter out infrared light beyond 700nm to obtain better image quality. By setting an infrared cutoff layer on the image-side surface of the eighth lens, it functions as an infrared cutoff filter, ensuring that the light participating in imaging is visible light and preventing image color shift.

[0061] In an exemplary embodiment, the eighth lens can be a composite lens composed of an aspherical lens portion and a glass substrate portion. The composite lens, while adding a surface degree of freedom to achieve a high-performance optical system for aberration and imaging performance correction, does not increase the overall number of lenses, thus reducing lens size and facilitating product thinning.

[0062] In an exemplary embodiment, the eighth lens is a compound lens formed by a combination of an aspherical lens portion and a substrate portion made of glass material. The material of the aspherical lens portion can be a deformable material under stress, specifically, it can be plastic, glue, etc. Exemplarily, the aspherical lens and an infrared filter, for example, are made into a compound lens. Considering factors such as cost, processing difficulty, and process stability, glue can be selected as the material for the aspherical portion. The shrinkage pressure of the glue during the manufacturing process is relatively small, which can prevent the infrared filter from being broken due to shrinkage pressure and other situations.

[0063] In an exemplary embodiment, the eighth lens is a compound lens formed by a combination of an aspherical lens portion and a substrate portion made of glass material. The shape of the aspherical lens portion can be the shape required by the design formed by imprinting after pasting the material of the aspherical lens portion onto the substrate portion made of glass material. The material of the aspherical lens portion can be selected as glue or other similar materials. Considering factors such as cost, processing difficulty, and process stability, taking the IR film as the substrate and adopting, for example, the nano-imprinting process is a relatively optimal solution. Its forming, cutting, and assembly are more stable, and parameters such as eccentricity, tilt, and sagittal height are also relatively easy to ensure, which is beneficial to improving the subsequent mass production yield.

[0064] In an exemplary embodiment, the camera lens of the present application may include at least one aperture. The aperture can restrict the light path and control the light intensity. The aperture can be set at an appropriate position of the camera lens. For example, the aperture can be set between the object side and the first lens.

[0065] In an exemplary embodiment, optionally, the above camera lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0066] The camera lens according to the above embodiment of the present application may include a lens barrel, a lens group, and a plurality of light shielding elements. The lens group includes the first to eighth lenses arranged in sequence from the object side to the image side along the optical axis. Among them, the eighth lens is a compound lens with one side being a plane; and the plurality of light shielding elements include the first to sixth light shielding elements sequentially disposed between each adjacent lens among the first to seventh lenses, and each light shielding element is respectively in contact with the lens adjacent to its object side; at the same time, controlling the maximum length L of the lens barrel along the optical axis direction, the distance T78 along the optical axis from the image side of the seventh lens to the object side of the eighth lens, and the central thickness CT8 of the eighth lens on the optical axis to satisfy the conditional formula 2 < L / (T78 + CT8) < 6. Through this setting of the camera lens in the present application, the thickness of the eighth lens can be reasonably controlled, which helps the process forming of the eighth lens and can improve the yield of the eighth lens; and it can ensure the certainty of the setting form of the seventh lens and the eighth lens in the lens barrel, which helps to improve the fixing stability at the lens module end and helps to improve the lens yield.

[0067] In embodiments of this application, the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, and eighth lens may have one or more aspherical mirror surfaces. Aspherical lenses have better radius of curvature characteristics and have the advantages of improving distortion aberrations and astigmatism aberrations. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0068] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the camera lens and the number of light-shielding elements can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit them. For example, although eight lenses are described as an example in the embodiments, the camera lens is not limited to including eight lenses. If necessary, the camera lens may also include other numbers of lenses. As another example, the camera lens may also include other numbers of light-shielding elements than those described in the above embodiments, as needed.

[0069] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the camera lens applicable to the above-described embodiments.

[0070] Example 1

[0071] The following is for reference Figures 2 to 8 The camera lens according to Embodiment 1 of this application is described. Figure 2 , Figure 3 and Figure 4 The diagrams show the structure of the camera lens according to Embodiment 1 of this application in three different implementations.

[0072] refer to Figures 2 to 4 The camera lens includes a lens barrel P0 and four lenses arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The first lens E1 to the seventh lens E7 are mounted in the lens barrel P0, and the eighth lens E8 is a composite lens with one side being flat.

[0073] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 is a composite lens composed of a lens portion and a substrate portion. The lens portion has negative optical power, its object-side surface S15 is concave, and its image-side surface S16 is flat. The object-side surface S16 and image-side surface S17 of the substrate portion are both flat. The camera lens also includes an imaging surface S18 located on the image side of the eighth lens E8. Light from an object can pass sequentially through each surface S1 to S17 and finally be imaged on the imaging surface S18.

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

[0075]

[0076] Table 1

[0077] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7, as well as the object-side surface of the eighth lens, are aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0078]

[0079] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A1, and A2 that can be used for the aspherical mirrors S1 to S15 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A30 .

[0080] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0961E-02 9.6345E-04 -1.1928E-03 -5.4125E-04 -3.0994E-04 -4.9751E-05 -4.3170E-05 S2 -2.4391E-02 1.3073E-02 -3.7812E-03 9.4853E-04 -1.8564E-04 -4.6743E-06 -2.4957E-05 S3 -2.5127E-02 2.6280E-02 -1.2896E-03 2.2022E-03 4.1237E-05 7.9055E-05 -1.9275E-05 S4 -9.1565E-03 8.3949E-03 5.0763E-05 1.0006E-03 2.6336E-04 1.3498E-04 5.0001E-05 S5 -2.3161E-01 -5.1821E-03 2.2780E-03 1.2723E-03 2.6617E-04 4.8816E-05 -1.3759E-05 S6 -2.4450E-01 2.5871E-02 8.7419E-03 2.9680E-03 1.3934E-03 9.9537E-05 -2.5728E-04 S7 -1.3294E-01 6.4386E-03 -2.2793E-03 2.6960E-03 3.2774E-03 9.8158E-04 -1.0776E-04 S8 -2.0633E-01 -2.2678E-02 -5.1379E-03 2.2298E-03 3.2032E-03 2.0695E-03 9.5145E-04 S9 -2.8123E-01 -3.7744E-02 -1.7071E-03 6.6142E-03 -2.6241E-03 3.9454E-04 3.0093E-04 S10 -1.0477E+00 3.1135E-01 -5.9099E-02 2.6504E-02 -2.3716E-02 7.2017E-03 -1.8585E-04 S11 -1.3455E+00 1.8893E-02 8.2436E-02 3.1628E-02 -1.6226E-02 -2.5185E-03 -3.4667E-03 S12 -8.6121E-01 -2.1536E-01 1.4801E-01 -5.5979E-02 6.3550E-03 1.0774E-04 4.1121E-03 S13 -1.7968E+00 6.1269E-01 -1.5097E-01 -1.3777E-03 1.5494E-02 3.5255E-03 -1.0847E-02 S14 -4.9254E+00 1.0366E+00 -2.7023E-01 9.4912E-02 -3.8439E-02 1.6848E-02 -1.0599E-02 S15 7.2558E-01 -2.7883E-02 -8.9938E-02 8.6362E-02 -5.2276E-02 2.7482E-02 -1.3494E-02

[0081] Table 2-1

[0082] Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.0304E-06 -1.5848E-05 1.6664E-06 -2.2648E-06 -7.1657E-07 -4.1025E-06 1.7467E-06 S2 -2.6265E-05 3.5049E-06 -3.0630E-06 1.0223E-05 9.9964E-07 3.3194E-07 -2.6648E-06 S3 -2.9337E-06 5.1290E-06 4.2447E-06 4.5081E-06 4.2396E-06 -2.9475E-06 1.6987E-06 S4 1.7218E-05 2.4241E-06 -1.9275E-06 2.6711E-06 5.6090E-06 4.3706E-06 1.5378E-06 S5 -8.4593E-06 -1.0988E-05 4.3895E-06 5.2842E-07 5.4304E-06 1.7896E-06 1.4311E-07 S6 -7.6103E-05 -2.5958E-05 -1.2666E-05 1.8623E-06 -3.7113E-06 4.6556E-06 -2.4079E-06 S7 -4.6516E-05 -9.8099E-05 -7.2167E-05 -1.4319E-05 -2.8234E-06 2.8138E-06 -3.8754E-07 S8 4.4308E-04 2.0817E-04 5.5484E-05 2.6219E-05 -5.3441E-06 6.8730E-06 -3.3330E-06 S9 3.2662E-05 2.9849E-05 -3.4144E-05 4.6758E-05 -9.6160E-07 1.1221E-05 3.3707E-06 S10 1.0467E-03 -9.1915E-04 4.3478E-05 3.7973E-05 2.0139E-05 -8.7824E-06 -1.4348E-06 S11 3.3551E-03 -8.8776E-04 4.5885E-04 -2.9092E-04 7.0110E-05 -1.3385E-05 -7.6687E-06 S12 1.3836E-03 -2.4249E-03 7.5314E-04 -2.7498E-04 3.2381E-04 -1.1179E-04 1.9426E-06 S13 5.9829E-03 -1.5853E-03 2.5455E-04 -2.3812E-04 1.9366E-04 -4.8787E-05 -1.0341E-05 S14 6.8698E-03 -2.9291E-03 5.9224E-04 -6.2563E-04 4.9650E-04 -1.1952E-04 3.7324E-06 S15 5.4648E-03 -1.4494E-03 1.3420E-03 -1.5085E-03 7.9460E-04 -1.0176E-04 -9.1912E-07

[0083] Table 2-2

[0084] Figure 2 , Figure 3 and Figure 4 The diagrams show the structural schematics of the camera lens in three different embodiments, namely, Examples 1-1, 1-2, and 1-3. (Refer to...) Figures 2 to 4 As can be seen, in various embodiments, the camera lens also includes multiple light-shielding elements housed in the lens barrel P0.

[0085] Specifically, in Embodiment 1-1, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth light-shielding element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fourth auxiliary light-shielding element P4b located on the image side of the fourth light-shielding element P4 and in contact with the image side of the fourth light-shielding element P4; a fifth light-shielding element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; a sixth light-shielding element P6 located between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6; and a sixth auxiliary light-shielding element P6b located on the image side of the sixth light-shielding element P6 and in contact with the image side of the sixth light-shielding element P6.

[0086] In embodiments 1-2 and 1-3, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth light-shielding element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth light-shielding element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; a sixth light-shielding element P6 located between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6; and a sixth auxiliary light-shielding element P6b located on the image side of the sixth light-shielding element P6 and in contact with the image side of the sixth light-shielding element P6.

[0087] The relevant parameter values ​​in Examples 1-1, 1-2, and 1-3 are shown in Table 9, for reference. Figures 2 to 4 as well as Figure 1Wherein, d1s is the minimum inner diameter of the object side surface of the first light-shielding element P1; d2s is the minimum inner diameter of the object side surface of the second light-shielding element P2; d4s is the minimum inner diameter of the object side surface of the fourth light-shielding element P4; d4m is the minimum inner diameter of the image side surface of the fourth light-shielding element P4; D4m is the maximum outer diameter of the image side surface of the fourth light-shielding element P4; d5s is the minimum inner diameter of the object side surface of the fifth light-shielding element P5; d5m is the minimum inner diameter of the image side surface of the fifth light-shielding element P5; d0m is the minimum inner diameter of the image side end face of the lens barrel P0; D0m is the maximum outer diameter of the image side end face of the lens barrel P0; EP01 is the distance along the optical axis from the object side end face of the lens barrel P0 to the object side surface of the first light-shielding element P1; CP1 is the thickness of the first light-shielding element P1 along the optical axis; EP12 is the distance along the optical axis from the image side surface of the first light-shielding element P1 to the object side surface of the second light-shielding element P2; CP2 is the thickness of the second light-shielding element P1. The thickness of element P2 along the optical axis; EP23 is the distance along the optical axis from the image side of the second light-shielding element P2 to the object side of the third light-shielding element P3; CP3 is the thickness along the optical axis of the third light-shielding element P3; EP34 is the distance along the optical axis from the image side of the third light-shielding element P3 to the object side of the fourth light-shielding element P4; CP4 is the thickness along the optical axis of the fourth light-shielding element P4; EP45 is the distance along the optical axis from the image side of the fourth light-shielding element P4 to the object side of the fifth light-shielding element P5; CP5 is the thickness along the optical axis of the fifth light-shielding element P5; EP56 is the distance along the optical axis from the image side of the fifth light-shielding element P5 to the object side of the sixth light-shielding element P6; CP6 is the thickness along the optical axis of the sixth light-shielding element P6; L is the maximum length of the lens barrel P0 along the optical axis; D0s is the maximum outer diameter of the object side end face of the lens barrel; and d0s is the minimum inner diameter of the object side end face of the lens barrel. The units for all parameters shown in Table 9 are millimeters (mm).

[0088] Figure 5 The on-axis chromatic aberration curve of the camera lens of Embodiment 1 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 6 The magnification chromatic aberration curve of the camera lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 7 The astigmatism curve of the camera lens of Embodiment 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 8 The distortion curve of the camera lens in Embodiment 1 is shown, representing the distortion magnitude corresponding to different image heights. According to... Figures 5 to 8 It can be seen that the camera lens given in Example 1 can achieve good imaging quality.

[0089] Example 2

[0090] The following is for reference Figures 9 to 15A camera lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 9 , Figure 10 and Figure 11 The diagrams show the structure of the camera lens according to Embodiment 2 of this application in three different implementations.

[0091] refer to Figures 9 to 11 The camera lens includes a lens barrel P0 and four lenses arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The first lens E1 to the seventh lens E7 are mounted in the lens barrel P0, and the eighth lens E8 is a composite lens with one side being flat.

[0092] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 is a composite lens composed of a lens portion and a substrate portion. The lens portion has positive optical power, its object-side surface S15 is convex, and its image-side surface S16 is flat. The object-side surface S16 and image-side surface S17 of the substrate portion are both flat. The camera lens also includes an imaging surface S18 located on the image side of the eighth lens E8. Light from an object can, for example, pass sequentially through each surface S1 to S17 and finally be imaged on the imaging surface S18.

[0093] Table 3 shows the basic parameters of the camera lens in Example 2, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S15 in Example 2. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0094]

[0095] Table 3

[0096]

[0097]

[0098] Table 4-1

[0099] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.7566E-06 2.2124E-05 1.2231E-05 4.0786E-06 -7.7103E-06 -9.1706E-06 -5.7171E-06 S2 -4.8061E-05 5.2121E-05 -4.1411E-06 2.2343E-05 -1.2823E-05 9.7639E-06 -1.0897E-05 S3 -2.2559E-06 -7.2447E-06 6.2390E-07 -1.0618E-05 9.8810E-07 1.2020E-06 8.8416E-06 S4 6.8182E-05 2.6275E-05 1.9304E-05 5.8969E-06 1.0577E-05 2.3842E-06 3.9618E-06 S5 3.6669E-05 1.3901E-05 8.3607E-06 3.3665E-06 4.8650E-06 1.5636E-06 3.4765E-06 S6 -2.3169E-05 6.9978E-05 7.9194E-06 1.0461E-05 -3.3470E-06 5.2976E-06 -6.2424E-07 S7 5.3971E-05 8.7342E-05 -3.4922E-05 4.3770E-06 5.7630E-06 7.3453E-06 -1.7415E-06 S8 5.9725E-05 2.0094E-05 1.6240E-05 4.3406E-06 1.5046E-06 7.5266E-06 1.8169E-06 S9 -3.8059E-04 -7.9479E-04 -2.4388E-04 -6.6784E-05 7.6111E-05 3.8203E-05 3.0421E-05 S10 5.0261E-04 -4.6403E-04 3.1114E-04 -5.0247E-05 -4.4781E-07 -2.9951E-05 1.4247E-05 S11 1.6001E-03 -9.2391E-04 -3.5945E-04 -6.1647E-05 1.3244E-04 6.6429E-06 -1.8177E-05 S12 -1.7732E-03 8.7475E-04 1.1718E-04 3.1073E-04 -8.9530E-05 -1.8100E-05 2.3724E-06 S13 1.7027E-03 -3.4027E-03 1.7812E-03 -6.3464E-05 -3.5409E-04 1.6847E-04 -2.7397E-05 S14 8.2890E-03 -2.7216E-03 1.1302E-03 -1.0693E-03 7.3042E-04 -2.5963E-04 3.8970E-05 S15 1.4315E-03 1.4287E-03 -4.0105E-05 -2.0256E-04 5.3468E-04 -1.1660E-03 6.8556E-04

[0100] Table 4-2

[0101] Figure 9 , Figure 10 and Figure 11 The diagrams show the structural schematics of the camera lens in three different embodiments, namely, Examples 2-1, 2-2, and 2-3. (Refer to...) Figures 9 to 11 As can be seen, in various embodiments, the camera lens also includes multiple light-shielding elements housed in the lens barrel P0.

[0102] Specifically, in Embodiment 2-1, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth light-shielding element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fourth auxiliary light-shielding element P4b located on the image side of the fourth light-shielding element P4 and in contact with the image side of the fourth light-shielding element P4; a fifth light-shielding element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; a sixth light-shielding element P6 located between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6; and a sixth auxiliary light-shielding element P6b located on the image side of the sixth light-shielding element P6 and in contact with the image side of the sixth light-shielding element P6.

[0103] In embodiments 2-2 and 2-3, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; a fourth light-shielding element P4 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4; a fifth light-shielding element P5 located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; a sixth light-shielding element P6 located between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6; and a sixth auxiliary light-shielding element P6b located on the image side of the sixth light-shielding element P6 and in contact with the image side of the sixth light-shielding element P6.

[0104] The relevant parameter values ​​in Examples 2-1, 2-2 and 2-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0105] Figure 12 The on-axis chromatic aberration curve of the camera lens of Embodiment 2 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 13 The magnification chromatic aberration curve of the camera lens of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 14 The astigmatism curve of the camera lens of Embodiment 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 15 The distortion curve of the camera lens in Embodiment 2 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 12 to 15 It can be seen that the camera lens given in Example 2 can achieve good imaging quality.

[0106] Example 3

[0107] The following is for reference Figures 16 to 22 The camera lens according to Embodiment 3 of this application is described. Figure 16 , Figure 17 and Figure 18 Schematic diagrams of the camera lens according to Embodiment 3 of this application are shown in three different implementations.

[0108] refer to Figures 16 to 18The camera lens includes a lens barrel P0 and four lenses arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The first lens E1 to the seventh lens E7 are mounted in the lens barrel P0, and the eighth lens E8 is a composite lens with one side being flat.

[0109] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 is a composite lens composed of a lens portion and a substrate portion. The lens portion has positive optical power, its object-side surface S15 is convex, and its image-side surface S16 is flat. The object-side surface S16 and image-side surface S17 of the substrate portion are both flat. The camera lens also includes an imaging surface S18 located on the image side of the eighth lens E8. Light from an object can, for example, pass sequentially through each surface S1 to S17 and finally be imaged on the imaging surface S18.

[0110] Table 5 shows the basic parameters of the camera lens in Example 3, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S15 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0111]

[0112]

[0113] Table 5

[0114] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.0317E-02 -8.0953E-03 -2.4137E-03 -4.8220E-04 -6.2394E-05 7.0474E-06 -2.0516E-06 S2 -7.0783E-02 7.2906E-03 -2.4900E-03 5.7995E-04 -7.6451E-05 -3.0763E-06 -9.9830E-06 S3 -3.2850E-02 2.0802E-02 -9.7515E-04 1.2071E-03 -6.7775E-05 -1.5800E-05 -1.1028E-05 S4 1.7511E-03 6.3611E-03 -4.0639E-04 4.2932E-04 4.9058E-05 1.7249E-05 6.7984E-06 S5 -1.4773E-01 -8.0840E-03 -1.0880E-03 6.6864E-04 2.4204E-04 8.5999E-05 1.6577E-05 S6 -2.0075E-01 1.5915E-02 4.5747E-03 2.3321E-03 6.1674E-04 -1.0331E-04 -3.4143E-05 S7 -1.3790E-01 5.8038E-02 4.6653E-03 -3.0799E-03 -1.4373E-03 -1.0358E-03 1.4102E-04 S8 -2.0007E-01 5.5477E-02 3.1265E-02 8.3806E-05 -3.4949E-03 -4.8588E-03 -2.7108E-03 S9 -1.6275E-01 -2.8348E-01 5.7017E-02 3.3508E-02 2.1661E-02 1.4349E-03 -2.5791E-03 S10 -1.1732E+00 1.6837E-01 -7.1322E-03 3.6007E-02 -3.4512E-02 1.0104E-02 -4.7337E-04 S11 -5.0303E+00 1.0860E+00 -1.6343E-01 -3.7895E-02 1.8511E-02 1.9474E-02 -2.2006E-02 S12 -2.5782E+00 2.3030E-01 1.1867E-01 -1.1518E-01 4.8444E-02 -2.4696E-03 9.9533E-03 S13 -2.0573E+00 8.7895E-01 -3.7566E-01 1.6128E-01 -7.6786E-02 5.2305E-02 -2.8709E-02 S14 -6.6602E+00 1.5304E+00 -4.5002E-01 1.8714E-01 -9.0155E-02 3.3420E-02 -1.1676E-02 S15 1.5720E-01 5.6822E-01 -6.6231E-02 8.6890E-02 -1.1368E-01 -4.9504E-02 -1.5127E-01

[0115] Table 6-1

[0116] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.2905E-06 -2.9962E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -4.6571E-06 9.6795E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -3.1654E-06 -7.9549E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -5.0366E-07 -4.1529E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -5.8724E-06 2.6174E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -4.6050E-05 2.5109E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -6.0024E-05 -9.1351E-05 -8.0614E-05 2.3139E-05 7.6819E-06 -6.8809E-06 1.0133E-06 S8 -8.3469E-04 1.9251E-04 3.8389E-04 3.0906E-04 1.6918E-04 6.8550E-05 9.1250E-06 S9 -4.0912E-03 -1.6885E-03 -3.2215E-04 4.1724E-04 3.8118E-04 1.6127E-04 5.5623E-05 S10 -1.8753E-03 -2.0883E-03 -1.5227E-03 -4.5356E-04 -5.6976E-04 -1.7205E-04 -8.8626E-05 S11 4.5878E-03 4.1168E-03 -2.8344E-03 -6.2927E-04 7.5211E-04 -1.6050E-05 -1.7677E-04 S12 -1.6392E-02 3.8275E-03 3.3304E-04 1.6264E-03 -2.6860E-03 1.0445E-04 -1.0818E-04 S13 -2.5461E-03 1.3756E-02 -6.6259E-03 -3.1366E-03 3.6844E-03 5.1266E-04 -9.4724E-04 S14 1.6248E-02 -1.7183E-03 2.1199E-03 2.1060E-03 2.0081E-03 3.3225E-04 3.5351E-04 S15 -1.9859E-02 2.0348E-02 9.4316E-02 6.1456E-02 4.9371E-02 1.2804E-02 6.1595E-03

[0117] Table 6-2

[0118] Figure 16 , Figure 17 and Figure 18 The diagrams show the structural schematics of the camera lens in three different embodiments, namely, 3-1, 3-2, and 3-3. (Refer to...) Figures 16 to 18 As can be seen, in various embodiments, the camera lens also includes multiple light-shielding elements housed in the lens barrel P0.

[0119] Specifically, in embodiments 3-1, 3-2, and 3-3, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; and a third light-shielding element P3 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4. The fourth light-shielding element P4 is in surface contact; the fourth auxiliary light-shielding element P4b is located on the image side of the fourth light-shielding element P4 and in contact with the image side of the fourth light-shielding element P4; the fifth light-shielding element P5 is located between the fifth lens E5 and the sixth lens E6 and in contact with the image side of the fifth lens E5; the fifth auxiliary light-shielding element P5b is located on the image side of the fifth light-shielding element P5 and in contact with the image side of the fifth light-shielding element P5; and the sixth light-shielding element P6 is located between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6.

[0120] The relevant parameter values ​​in Examples 3-1, 3-2 and 3-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0121] Figure 19 The on-axis chromatic aberration curve of the camera lens of Embodiment 3 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 20 The magnification chromatic aberration curve of the camera lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 21 The astigmatism curve of the camera lens of Embodiment 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 22 The distortion curve of the camera lens in Embodiment 3 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 19 to 22It can be seen that the camera lens given in Example 3 can achieve good imaging quality.

[0122] Example 4

[0123] The following is for reference Figures 23 to 29 The camera lens according to Embodiment 4 of this application is described. Figure 23 , Figure 24 and Figure 25 Schematic diagrams of the camera lens according to Embodiment 4 of this application are shown in three different implementations.

[0124] refer to Figures 23 to 25 The camera lens includes a lens barrel P0 and four lenses arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an eighth lens E8. The first lens E1 to the seventh lens E7 are mounted in the lens barrel P0, and the eighth lens E8 is a composite lens with one side being flat.

[0125] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 is a composite lens composed of a lens portion and a substrate portion. The lens portion has negative optical power, its object-side surface S15 is concave, and its image-side surface S16 is flat. The object-side surface S16 and image-side surface S17 of the substrate portion are both flat. The camera lens also includes an imaging surface S18 located on the image side of the eighth lens E8. Light from an object can pass sequentially through each surface S1 to S17 and finally be imaged on the imaging surface S18.

[0126] Table 7 shows the basic parameters of the camera lens in Example 4, where the units for radius of curvature, thickness / distance, and effective radius are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S15 in Example 4. 10 A 12 A 14 A 16 A 18 A 20 A22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0127]

[0128]

[0129] Table 7

[0130] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.0842E-02 9.7769E-04 -2.4020E-04 -1.5377E-05 -5.6385E-05 1.4458E-05 -1.4765E-05 S2 2.6387E-02 -3.8041E-03 -6.7891E-04 -6.7104E-05 -6.2244E-05 1.5227E-05 5.3317E-06 S3 -6.2977E-02 5.9214E-03 -1.2354E-03 2.7314E-04 -1.1780E-04 3.9443E-05 -7.2455E-06 S4 -5.3285E-02 1.3733E-02 5.0075E-04 4.9295E-04 -3.4051E-05 -5.0883E-06 -1.5214E-05 S5 2.1877E-02 2.6845E-03 9.7197E-04 2.0149E-04 -2.9301E-05 -3.6091E-05 -1.8555E-05 S6 1.4392E-02 2.1524E-03 2.6716E-03 5.7716E-04 1.6009E-04 -1.1891E-04 -1.6657E-05 S7 -1.4353E-01 -7.7852E-03 1.4717E-03 7.0473E-04 4.4248E-04 -2.6433E-04 5.8592E-06 S8 -3.0835E-01 3.7758E-02 5.7958E-04 4.7105E-04 -3.2293E-05 -1.0273E-03 3.4549E-04 S9 -6.9607E-01 8.2110E-02 2.9534E-03 -9.5825E-04 -1.4603E-04 -8.8858E-04 5.2901E-04 S10 -3.2485E-01 1.4950E-02 1.1194E-02 -5.7595E-03 4.7490E-04 2.9177E-04 -1.1293E-04 S11 1.0477E+00 -1.0396E-01 1.0648E-02 -4.9283E-03 1.5117E-03 -4.0298E-04 1.0071E-04 S12 3.9254E-01 5.9979E-02 -3.4866E-02 1.1760E-03 1.3324E-03 -1.2422E-03 7.4138E-04 S13 -2.3846E+00 3.4812E-01 8.6401E-03 -9.6317E-03 -9.7899E-03 6.1323E-03 -1.1140E-03 S14 -1.6186E+00 -6.0827E-02 -1.5894E-02 1.0738E-02 5.4015E-04 6.4746E-03 8.6374E-04 S15 2.8460E+00 -3.1364E-01 -1.1741E-01 7.2950E-02 -5.6165E-02 2.1393E-02 -1.5481E-03

[0131] Table 8-1

[0132] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.0085E-05 -4.9675E-06 4.9706E-06 -5.4046E-06 1.7404E-06 -2.4024E-06 1.6101E-06 S2 -1.0540E-06 -1.2571E-06 -1.7533E-06 7.7016E-07 -7.1655E-07 1.2082E-06 -3.9869E-07 S3 1.2801E-05 1.8536E-07 -5.0178E-08 -8.3397E-06 -4.2682E-06 -2.4737E-06 2.4480E-06 S4 -1.7126E-06 1.1358E-05 6.9629E-06 2.7526E-06 -1.8843E-06 8.7417E-07 2.9589E-07 S5 4.8600E-06 -2.8125E-06 3.0978E-06 -3.7512E-06 -5.5161E-07 -3.7460E-06 2.1461E-06 S6 -3.3115E-05 8.2559E-06 -4.5643E-07 3.5494E-06 3.0814E-07 3.5393E-06 3.1197E-06 S7 -7.0415E-05 -2.3064E-05 -9.8107E-06 6.2215E-06 -6.2321E-07 3.8464E-06 6.6256E-07 S8 -7.5421E-05 4.7178E-05 -9.7206E-06 2.8038E-05 -1.6172E-05 1.3080E-05 -1.1149E-05 S9 2.4903E-05 -1.6051E-05 1.3849E-05 1.9366E-05 -2.3166E-05 8.8767E-06 -1.1716E-05 S10 7.0559E-06 -9.0924E-06 9.5165E-05 3.5442E-05 -1.7857E-05 -3.3245E-06 -1.3309E-05 S11 -9.5447E-05 9.6619E-05 -3.2282E-05 5.8997E-05 -5.4714E-05 5.0735E-06 4.4588E-06 S12 2.0837E-04 -3.8444E-04 -1.7047E-05 2.0833E-04 -4.7078E-05 -6.1383E-05 2.6227E-05 S13 -1.7336E-04 -2.1723E-04 2.4522E-04 -1.2542E-05 -7.3854E-05 9.6012E-06 1.4851E-05 S14 -1.2423E-03 -1.1933E-03 1.7567E-04 -9.7749E-05 2.4613E-05 1.6183E-04 -5.8038E-05 S15 -5.7810E-04 -4.8086E-04 1.8744E-03 -2.2661E-03 3.3946E-04 7.7024E-04 -1.8232E-04

[0133] Table 8-2

[0134] Figure 23 , Figure 24 and Figure 25 The diagrams show the structural schematics of the camera lens in three different embodiments, namely 4-1, 4-2, and 4-3, for reference. Figures 23 to 25 As can be seen, in various embodiments, the camera lens also includes multiple light-shielding elements housed in the lens barrel P0.

[0135] Specifically, in embodiments 4-1, 4-2, and 4-3, the plurality of light-shielding elements include: a first light-shielding element P1 located between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1; a second light-shielding element P2 located between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2; a third light-shielding element P3 located between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3; and a third light-shielding element P3 located between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4. The fifth light-shielding element P4 is in surface contact with the fifth lens E5 and the sixth lens E6 and is in contact with the image side of the fifth lens E5; the fifth auxiliary light-shielding element P5b is located on the image side of the fifth light-shielding element P5 and is in contact with the image side of the fifth light-shielding element P5; the sixth light-shielding element P6 is located between the sixth lens E6 and the seventh lens E7 and is in contact with the image side of the sixth lens E6; and the sixth auxiliary light-shielding element P6b is located on the image side of the sixth light-shielding element P6 and is in contact with the image side of the sixth light-shielding element P6.

[0136] The relevant parameter values ​​in Examples 4-1, 4-2 and 4-3 are shown in Table 9. The meaning of each parameter is as described above and will not be repeated here. The unit of each parameter in Table 9 is millimeters (mm).

[0137] Figure 26 The on-axis chromatic aberration curve of the camera lens of Embodiment 4 is shown, which represents the deviation of the convergence focal point of light of different wavelengths after passing through the lens. Figure 27 The magnification chromatic aberration curve of the camera lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. Figure 28 The astigmatism curve of the camera lens of Embodiment 4 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 29 The distortion curve of the camera lens in Example 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 26 to 29 It can be seen that the camera lens given in Example 4 can achieve good imaging quality.

[0138]

[0139]

[0140] Table 9

[0141] Furthermore, in Examples 1 to 4, the effective focal length values ​​f1 to f8 of each lens, the effective focal length f of the camera lens, the distance TTL from the object side of the first lens to the imaging surface of the camera lens along the optical axis, half the diagonal length ImgH of the effective pixel area on the imaging surface, the maximum semi-FOV of the camera lens, and the aperture value fno of the camera lens are shown in Table 10.

[0142] Parameters / Examples 1 2 3 4 f1(mm) 5.97 5.93 5.62 4.84 f2 (mm) -16.41 -16.97 -19.02 -8.32 f3 (mm) -41.09 -34.04 -20.08 23.27 f4 (mm) 23.30 16.17 12.45 -13.47 f5 (mm) -8.14 -8.45 -8.13 9.23 f6 (mm) 6.59 3.96 5.03 -34.68 f7 (mm) 60.12 -4.69 -7.75 11.49 f8(mm) -12.25 204.38 190.10 -9.17 f(mm) 5.99 5.73 5.46 5.69 TTL(mm) 7.29 7.26 7.00 7.22 ImgH(mm) 5.36 5.36 5.05 5.00 Semi-FOV (°) 41.25 42.25 42.07 40.43 fno 1.72 1.61 1.87 1.95

[0143] Table 10

[0144] Examples 1 to 4 satisfy the conditions shown in Tables 11-1 and 11-2, respectively.

[0145] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 L / (T78+CT8) 2.09 2.08 2.08 4.21 4.44 4.44 CT6 / EP56×N6 1.39 1.40 1.40 1.33 1.33 1.33 ∑CT / ∑CP 7.95 29.09 26.53 9.81 35.05 33.46 R8 / d4s+R9 / d4m -4.55 -6.07 -6.07 0.27 0.52 0.52 f5 / (D4m-d4m) -10.72 -3.63 -3.63 -15.37 -3.89 -3.91 ∑EP / ∑CP / fno 4.16 16.78 15.25 5.02 19.58 18.65 f1 / d1s-f2 / d2s 7.30 7.30 7.30 7.55 7.55 7.55 f / (D0s-d0s) 3.46 7.48 7.48 2.11 2.11 2.11 f / (TTL-L) 2.78 2.77 2.77 4.46 6.00 6.00 d5m / R11+d5s / R10 2.41 2.41 2.41 4.39 4.33 4.35

[0146] Table 11-1

[0147] Conditional / Example 3-1 3-2 3-3 4-1 4-2 4-3 L / (T78+CT8) 5.70 5.70 5.70 3.42 3.42 3.42 CT6 / EP56×N6 0.64 0.64 0.64 2.84 2.84 2.84 ∑CT / ∑CP 9.45 33.40 29.69 5.48 5.48 5.48 R8 / d4s+R9 / d4m -3.70 -4.70 -4.70 2.95 2.95 2.95 f5 / (D4m-d4m) -14.27 -4.07 -4.07 5.89 5.89 5.89 ∑EP / ∑CP / fno 5.25 19.96 17.68 2.00 2.00 2.00 f1 / d1s-f2 / d2s 8.70 8.70 8.70 4.59 4.59 4.59 f / (D0s-d0s) 2.01 2.01 2.00 2.09 2.09 2.09 f / (TTL-L) 5.29 5.29 5.29 4.22 4.22 4.22 d5m / R11+d5s / R10 4.43 4.43 4.43 -1.16 -1.16 -1.16

[0148] Table 11-2

[0149] This application also provides an imaging device equipped with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. The imaging device can 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.

[0150] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An imaging lens comprising a lens barrel, a lens group, and a plurality of light shielding members, characterized by the lens group comprising, in order from an object side to an image side along an 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 the first lens has positive refractive power, an object side surface thereof is convex, and an image side surface thereof is concave; the second lens has negative refractive power, an object side surface thereof is convex, and an image side surface thereof is concave; an image side surface of the third lens is concave; an object side surface of the fourth lens is convex; an image side surface of the fifth lens is concave; an object side surface of the seventh lens is convex, and an image side surface thereof is concave; the eighth lens is a composite lens composed of a non-spherical lens portion and a substrate portion made of glass, and has a flat image side surface; and the third lens and the fifth lens have negative refractive power, the fourth lens and the sixth lens have positive refractive power, and the seventh lens and the eighth lens have refractive power of opposite signs, or the third lens, the fifth lens, and the seventh lens have positive refractive power, and the fourth lens, the sixth lens, and the eighth lens have negative refractive power; the first lens to the seventh lens are fitted in the lens barrel; the plurality of light shielding members include a first light shielding member located between the first lens and the second lens and partially in contact with the image side surface of the first lens, a second light shielding member located between the second lens and the third lens and partially in contact with the image side surface of the second lens, a third light shielding member located between the third lens and the fourth lens and partially in contact with the image side surface of the third lens, a fourth light shielding member located between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, a fifth light shielding member located between the fifth lens and the sixth lens and partially in contact with the image side surface of the fifth lens, and a sixth light shielding member located between the sixth lens and the seventh lens and partially in contact with the image side surface of the sixth lens; the imaging lens satisfies: 2.08 ≤ L / (T78 + CT8) ≤ 5.70, where L is the maximum length of the lens barrel in the direction of the optical axis, T78 is the distance from the image side surface of the seventh lens to the object side surface of the eighth lens along the optical axis, and CT8 is the central thickness of the eighth lens in the optical axis; the number of lenses having refractive power in the imaging lens is eight.

2. The camera lens according to claim 1, characterized in that, the central thickness CT6 of the sixth lens in the optical axis, the distance EP56 from the image side surface of the fifth light shielding member to the object side surface of the sixth light shielding member along the optical axis, and the refractive index N6 of the sixth lens satisfy: 0.64 ≤ CT6 / EP56 × N6 ≤ 2.

84.

3. The camera lens of claim 1, wherein the sum ∑CT of the central thicknesses of the first lens to the eighth lens in the optical axis and the sum ∑CP of the thicknesses of the first light shielding member to the sixth light shielding member in the direction of the optical axis satisfy: 5.48 ≤ ∑CT / ∑CP ≤ 35.

05.

4. The camera lens of claim 1, wherein A distance from an object side end surface of the lens barrel to an object side surface of the first light shielding element along the optical axis and a sum ∑EP of intervals of each of the first light shielding element to the sixth light shielding element along the optical axis, a sum ∑CP of thicknesses of each of the first light shielding element to the sixth light shielding element along the optical axis, and an F-number fno of the photographing lens satisfy: 2.00 ≤ ∑EP / ∑CP / fno < 20.

5. The camera lens of claim 1, wherein A radius of curvature R8 of an image side surface of the fourth lens, a minimum inner diameter d4s of an object side surface of the fourth light shielding element, a radius of curvature R9 of an object side surface of the fifth lens, and a minimum inner diameter d4m of an image side surface of the fourth light shielding element satisfy: -6.07 ≤ R8 / d4s + R9 / d4m ≤ 2.

95.

6. The camera lens of claim 1, wherein An effective focal length f5 of the fifth lens, a maximum outer diameter D4m of an image side surface of the fourth light shielding element, and a minimum inner diameter d4m of an image side surface of the fourth light shielding element satisfy: -15.37 ≤ f5 / (D4m-d4m) ≤ 5.

89.

7. The camera lens of claim 1, wherein An effective focal length f1 of the first lens, a minimum inner diameter d1s of an object side surface of the first light shielding element, an effective focal length f2 of the second lens, and a minimum inner diameter d2s of an object side surface of the second light shielding element satisfy: 4.59 ≤ f1 / d1s-f2 / d2s ≤ 8.

70.

8. The camera lens according to any one of claims 1 to 7, characterized in that, An effective focal length f of the photographing lens, a maximum outer diameter D0s of the object side end surface of the lens barrel, and a minimum inner diameter d0s of the object side end surface of the lens barrel satisfy: 2.00 ≤ f / (D0s-d0s) ≤ 7.

48.

9. The camera lens according to any one of claims 1 to 7, characterized in that, An effective focal length f of the photographing lens, a distance TTL from an object side surface of the first lens to an image surface of the photographing lens along the optical axis, and a maximum length L of the lens barrel along the optical axis satisfy: 2.77 ≤ f / (TTL-L) ≤ 6.

00.

10. The camera lens according to any one of claims 1 to 7, characterized in that, A minimum inner diameter d5m of an image side surface of the fifth light shielding element, a radius of curvature R11 of an object side surface of the sixth lens, a minimum inner diameter d5s of an object side surface of the fifth light shielding element, and a radius of curvature R10 of an image side surface of the fifth lens satisfy: -1.16 ≤ d5m / R11 + d5s / R10 ≤ 4.

43.

11. The camera lens according to any one of claims 1 to 7, characterized in that, The plurality of light shielding elements further include a fourth auxiliary light shielding element located on an image side of the fourth light shielding element and partially in contact with an image side surface of the fourth light shielding element.

12. The camera lens according to any one of claims 1 to 7, characterized in that, The plurality of light shielding elements further include a fifth auxiliary light shielding element located on an image side of the fifth light shielding element and partially in contact with an image side surface of the fifth light shielding element.

13. The camera lens of any one of claims 1 to 7, wherein, The plurality of light shielding elements further include a sixth auxiliary light shielding element located on an image side of the sixth light shielding element and partially in contact with an image side surface of the sixth light shielding element.

14. The camera lens of any one of claims 1 to 7, wherein, The eighth lens comprises a material with infrared cut-off filtering function, so that the eighth lens has the function of infrared cut-off filtering.

15. The camera lens of any one of claims 1 to 7, wherein, An image side surface of the eighth lens has an infrared cut-off layer, so that the eighth lens has the function of infrared cut-off filtering.

16. The camera lens of claim 1, wherein The material of the aspheric lens part is a force-deformable material.

17. The camera lens of claim 1, wherein The material of the aspheric lens part is plastic or glue.

18. The camera lens of claim 1, wherein, The shape of the aspherical lens portion is formed by pressing after the material of the aspherical lens portion is attached to the substrate portion of the glass material.

Images