Optical lenses, camera modules and electronic equipment

Abstract

The present invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged along the optical axis from the object side to the image side and have refractive power; the optical lens satisfies the following relationship: 2≤TTL / EPD≤4. The optical lens, the camera module and the electronic device provided by the embodiment of the present invention use a nine-piece lens and define the relationship between the total length of the optical lens and the entrance pupil diameter, so that the optical lens satisfies the relationship: 2≤TTL / EPD≤4, which can effectively control the total length of the optical lens, so that the optical lens can meet the design requirements of miniaturization, and at the same time can increase the amount of light entering the optical lens, thereby increasing the relative illumination of the edge field of view, and then can accurately capture and identify the position of light and image, so that the optical lens can have good imaging quality.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to an optical lens, a camera module and an electronic device. Background Art

[0002] In recent years, with the advancement of the science and technology industry, imaging technology has continued to develop, and optical lenses for optical imaging have been widely used in electronic devices such as smartphones, tablets, and cameras. Taking smartphones as an example, in order to improve the shooting effect, equipping the mobile phone with one, two, or even three or more cameras with different orientation functions has become the mainstream of the smartphone market. However, with the requirements for the lightweight design of smartphones, the cameras carried need to be miniaturized. In the process of miniaturization of the camera, how to shorten the total length of the optical lens of the camera while ensuring the amount of light entering the optical lens to ensure the imaging quality of the optical lens is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present invention disclose an optical lens, a camera module and an electronic device, which can realize a miniaturized design of the optical lens while shortening the total length of the optical lens and increasing the amount of light entering the optical lens, so as to improve the imaging quality of the optical lens.

[0004] In order to achieve the above-mentioned object, in a first aspect, the present invention discloses an optical lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged along an optical axis from an object side to an image side and have refractive power; the optical lens satisfies the following relationship:

[0005] 2≤TTL / EPD≤4, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and EPD is the entrance pupil diameter of the optical lens.

[0006] In the optical lens provided in this embodiment, a nine-piece lens is used, and when the nine-piece lens is limited to satisfy the relationship 2≤TTL / EPD≤4, the total length of the optical lens (i.e., TTL) can be effectively controlled to meet the miniaturization design requirements of the optical lens. At the same time, on this basis, the optical lens can also have a larger amount of light input, thereby increasing the relative illumination of the edge field of view, and then accurately capturing and identifying the position of light and images, so that the optical lens can have good imaging quality.

[0007] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0≤f12 / f≤2;

[0008] Wherein, f12 is the combined focal length of the first lens and the second lens, and f is the effective focal length of the optical lens.

[0009] When the above relationship is satisfied, the deflection of light in the first lens and the second lens can be slowed down, and the light deflection angle can be reduced, thereby reducing the dispersion of the optical lens and improving the imaging performance of the optical lens.

[0010] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0≤BFL / TTL≤0.5;

[0011] Wherein, BFL is the shortest distance from the image side surface of the ninth lens to the imaging surface of the optical lens parallel to the optical axis.

[0012] When the above relationship is satisfied, a suitable space can be provided between the optical lens and the electronic photosensitive chip while balancing the lightweight design of the optical lens, which can further increase the focusing range of the optical lens and the electronic photosensitive chip in the active focusing process.

[0013] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0≤MINL1 / MAXL1≤1;

[0014] Wherein, MINL1 is the minimum thickness from the object side optical effective area of ​​the first lens to the image side optical effective area of ​​the first lens in the direction parallel to the optical axis, and MAXL1 is the maximum thickness from the object side optical effective area of ​​the first lens to the image side optical effective area of ​​the first lens in the direction parallel to the optical axis.

[0015] When this relationship is satisfied, the assembly sensitivity of the optical lens can be effectively reduced, thereby reducing the production difficulty of the first lens and further improving the yield of the first lens.

[0016] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 1≤MT*f≤5;

[0017] Wherein, MT is the average thickness of nine lenses from the first lens to the ninth lens on the optical axis, and f is the effective focal length of the optical lens.

[0018] When this relationship is satisfied, the thickness and focal length of each lens can be effectively balanced, thereby optimizing the molding process, reducing the lens processing difficulty of the optical lens, improving the processing yield, and facilitating the mass production of optical lenses.

[0019] As an optional implementation, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 5mm-1 ≤MV / f≤15mm -1 ;

[0020] Wherein, MV is the average value of the Abbe numbers of the first lens to the ninth lens, and f is the effective focal length of the optical lens.

[0021] When the above relationship is satisfied, the chromatic aberration of the optical lens can be effectively balanced, and high Abbe numbers and low Abbe numbers correspond to different refractive indices, so that the optical lens can improve its imaging performance by combining lenses of different materials, which is beneficial to improving the imaging quality of the optical lens.

[0022] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0≤AT / TTL≤0.5;

[0023] Wherein, AT is the sum of the air spaces between two adjacent lenses on the optical axis among the first lens to the ninth lens.

[0024] By reasonably configuring the relationship between the sum of the air spaces between two adjacent lenses on the optical axis and the total length of the optical lens among the first lens to the ninth lens, the arrangement of the lenses of the optical lens can be made more compact, thereby effectively shortening the total length of the optical lens and meeting the miniaturization design requirements of the optical lens.

[0025] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 1≤TTL / f≤2;

[0026] Wherein, f is the effective focal length of the optical lens. By controlling the relationship between the total length of the optical lens and the effective focal length, the optical lens can balance the effective focal length of the optical lens while meeting the requirements of miniaturization design.

[0027] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0mm / deg≤f / FOV≤0.5mm / deg;

[0028] Wherein, f is the effective focal length of the optical lens, and FOV is the maximum field of view of the optical lens.

[0029] When the above relationship is satisfied, the effective focal length and the maximum field angle of the optical lens can be effectively balanced, so that the optical lens has a large field angle and the imaging range is increased.

[0030] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 1≤TTL / IMGH≤3, wherein IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens.

[0031] By controlling the relationship between TTL and IMGH, it is possible to achieve a miniaturized design of the optical lens. At the same time, IMGH determines the size of the electronic photosensitive chip. If the above formula is satisfied, the optical lens can support a high-pixel electronic photosensitive chip, thereby making the optical lens have high pixels and meeting the imaging quality requirements of the optical lens.

[0032] In a second aspect, the present invention discloses a camera module, which includes an electronic photosensitive chip and the optical lens as described in the first aspect, wherein the electronic photosensitive chip is arranged on the image side of the optical lens.

[0033] The camera module with the optical lens can achieve miniaturization design while shortening the total length of the optical lens and increasing the amount of light entering the optical lens, thereby improving the imaging quality of the optical lens.

[0034] In a third aspect, the present invention further discloses an electronic device, the electronic device comprising a housing and a camera module as described in the second aspect, the camera module being arranged in the housing. The electronic device having the camera module can achieve a miniaturized design while also shortening the total length of the optical lens and increasing the amount of light entering the optical lens, thereby improving the imaging quality of the optical lens.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The optical lens, camera module and electronic device provided by the embodiments of the present invention use a nine-piece lens and limit the relationship between the total length of the optical lens and the entrance pupil diameter, so that the optical lens satisfies the relationship: 2≤TTL / EPD≤4. The total length of the optical lens can be effectively controlled, so that the optical lens can meet the design requirements of miniaturization, and at the same time, the amount of light entering the optical lens can be increased, thereby increasing the relative illumination of the edge field of view, and then accurately capturing and identifying the position of light and images, so that the optical lens can have good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 is a schematic diagram of the structure of the optical lens disclosed in Example 1 of the present application;

[0039] Figure 2is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 1 of the present application;

[0040] Figure 3 is a schematic diagram of the structure of the optical lens disclosed in Example 2 of the present application;

[0041] Figure 4 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 2 of the present application;

[0042] Figure 5 is a schematic diagram of the structure of the optical lens disclosed in Example 3 of the present application;

[0043] Figure 6 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 3 of the present application;

[0044] Figure 7 is a schematic structural diagram of an optical lens disclosed in Embodiment 4 of the present application;

[0045] Figure 8 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 4 of the present application;

[0046] Fig. 9 is a schematic structural diagram of an optical lens disclosed in Example 5 of the present application;

[0047] Fig.10 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 5 of the present application;

[0048] Fig.11 is a schematic diagram of the structure of the optical lens disclosed in Example 6 of the present application;

[0049] Fig.12 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 6 of the present application;

[0050] Fig.13 is a schematic diagram of the structure of the optical lens disclosed in Embodiment 7 of the present application;

[0051] Fig.14 is a light spherical aberration diagram (mm), an astigmatism curve diagram (mm), and a distortion curve diagram (%) of the optical lens disclosed in Example 7 of the present application;

[0052] Fig.15 It is a structural schematic diagram of the camera module disclosed in this application;

[0053] Fig.16 It is a schematic diagram of the structure of the electronic device disclosed in this application. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the present invention, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0057] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0058] See also Figure 1According to the first aspect of the present application, the present application discloses an optical lens 100, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9 and an imaging surface 101 of the optical lens, which are arranged in sequence from the object side to the image side along the optical axis O. During imaging, light enters the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the ninth lens L9 in sequence from the object side of the first lens L1 and is finally imaged on the imaging surface 101 of the optical lens 100. Among them, the first lens L1 has a negative refractive power or a positive refractive power, and includes a first object side surface 11 and a first image side surface 12, and the second lens L2 has a positive refractive power or a negative refractive power, and includes a second object side surface 21 and a second image side surface 22. The third lens L3 has positive or negative refractive power, including a third object-side surface 31 and a third image-side surface 32. The fourth lens L4 has positive or negative refractive power, including a fourth object-side surface 41 and a fourth image-side surface 42. The fifth lens L5 has negative or positive refractive power, including a fifth object-side surface 51 and a fifth image-side surface 52. The sixth lens L6 has positive or negative refractive power, including a sixth object-side surface 61 and a sixth image-side surface 62. The seventh lens L7 has positive or negative refractive power, including a seventh object-side surface 71 and a seventh image-side surface 72. The eighth lens L8 has positive or negative refractive power, including an eighth object-side surface 81 and an eighth image-side surface 82. The ninth lens L9 has positive or negative refractive power, including a ninth object-side surface 91 and a ninth image-side surface 92.

[0059] Furthermore, in the first lens L1 to the ninth lens L9, the object-side surface of each lens may be a convex surface or a concave surface near the optical axis, and the image-side surface of each lens may be a convex surface or a concave surface near the optical axis.

[0060] Specifically, the first object side surface 11 is convex or concave at the near optical axis, and the first image side surface 12 is concave or convex at the near optical axis. The second object side surface 21 is convex or concave at the near optical axis, and the second image side surface 22 is concave or convex at the near optical axis. The third object side surface 31 is convex or concave at the near optical axis, the third image side surface 32 is convex or concave at the near optical axis, the fourth object side surface 41 is convex or concave at the near optical axis, and the fourth image side surface L44 is convex or concave at the near optical axis. The fifth object side surface 51 is concave or convex at the near optical axis, and the fifth image side surface 52 is concave or convex at the near optical axis. The sixth object side surface 61 is concave or convex at the near optical axis, and the sixth image side surface 62 is convex or concave at the near optical axis. The seventh object side surface 71 is concave or convex at the optical axis, and the seventh image side surface 72 is concave or convex at the optical axis. The eighth object side surface 81 is convex or concave at the near optical axis, and the eighth image side surface 82 is concave or convex at the near optical axis. The ninth object side surface 91 is convex or concave at the near optical axis, and the ninth image side surface 92 is concave or convex at the near optical axis.

[0061] Furthermore, in the first lens L1 to the ninth lens L9, the object-side surface of each lens is a convex surface or a concave surface near the circumference, and the image-side surface of each lens is a convex surface or a concave surface near the circumference.

[0062] Specifically, the first object side surface 11 is convex or concave near the circumference, and the first image side surface 12 is concave or convex near the circumference. The second object side surface 21 is concave or convex near the circumference, and the second image side surface 22 is convex or concave near the circumference. The third object side surface 31 is convex or concave near the circumference, and the third image side surface 32 is convex or concave near the circumference. The fourth object side surface 41 is convex or concave near the circumference, and the fourth image side surface 42 is convex or concave near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is convex or concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object-side surface 81 is concave near the circumference, and the eighth image-side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0063] In some embodiments, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8 and the ninth lens L9 can all be aspherical lenses. The characteristic of an aspherical lens is that its curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better imaging characteristics and has the advantage of improving aberrations such as distortion and astigmatism.

[0064] In an optional implementation, among the first lens L1 to the ninth lens L9, the nine lenses may be made of plastic. Plastic lenses can effectively reduce the weight of the optical lens 100 and reduce its production cost.

[0065] In another optional implementation, among the first lens L1 to the ninth lens L9, the material of the nine lenses can all be glass. Lenses made of glass are less sensitive to temperature and can have better optical properties.

[0066] It is understandable that, among the above nine lenses, some lenses may be made of glass, while others may be made of plastic. The material setting of the above nine lenses is not specifically limited in this embodiment as long as it can meet the optical performance requirements.

[0067] In some embodiments, the optical lens 100 further includes a stop 102, which may be an aperture stop 102 and / or a field stop 102, which may be disposed on the object side surface 11 of the first lens L1. The use of a front stop provides a possibility for a large field angle of the optical lens 100. It is understandable that a stop may also be disposed at other positions of the optical lens 100, such as between the first lens L1 and the second lens L2, or between the second lens L2 and the third lens L3, etc., that is, a central stop is used, which is not specifically limited in this embodiment.

[0068] Optionally, in order to improve the imaging quality, the optical lens 100 further includes an infrared filter 103, which is disposed between the image side surface 92 of the ninth lens L9 and the imaging surface 101 of the optical lens 100. The infrared filter 103 can effectively filter the infrared light passing through the ninth lens L9, thereby ensuring the imaging clarity of the object on the imaging surface 101 and improving the imaging quality.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 2≤TTL / EPD≤4, wherein TTL is the distance on the optical axis from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100, and EPD is the entrance pupil diameter of the optical lens 100. When this relationship is satisfied, the total length of the optical lens (i.e., TTL) can be effectively controlled, and the miniaturization design requirements of the optical lens can be met. At the same time, on this basis, the optical lens can also have a larger amount of light entering, thereby increasing the relative illumination of the edge field of view, and then accurately capturing and identifying the position of light and images, so that the optical lens can have good imaging quality.

[0070] Furthermore, the above relationship can be adjusted to: 2.368≤TTL / EPD≤3.865. That is, the ratio of TTL / EPD can be 2.368, 2.82, 3.271, 3.312, 3.476, 3.674, 3.865, etc.

[0071] In some embodiments, the optical lens 100 satisfies the following relationship: 0≤f12 / f≤2, and further may be: 0.821≤f12 / f≤1.603, wherein f12 is the combined focal length of the first lens L1 and the second lens L2, and f is the effective focal length of the optical lens 100. When the above relationship is satisfied, the deflection of light in the first lens and the second lens can be slowed down, and the light deflection angle can be reduced, thereby reducing the dispersion of the optical lens and improving the imaging performance of the optical lens.

[0072] In some embodiments, the optical lens 100 satisfies the following relationship: 0≤BFL / TTL≤0.5, and further may be: 0.071≤BFL / TTL≤0.127, wherein BFL is the shortest distance from the image side surface 92 of the ninth lens L9 to the imaging surface 101 of the optical lens 100 parallel to the optical axis.

[0073] When the above relationship is satisfied, a suitable space can be provided between the optical lens and the electronic photosensitive chip while balancing the lightweight design of the optical lens, which can further increase the focusing range of the optical lens and the electronic photosensitive chip in the active focusing process.

[0074] In some embodiments, the optical lens 100 satisfies the following relationship: 0≤MINL1 / MAXL1≤1, and may further be: 0.516≤MINL1 / MAXL1≤0.947, wherein MINL1 is the minimum thickness of the first lens element L1 from an optically effective area of ​​the first object-side surface 11 to an optically effective area of ​​the first image-side surface 12 in a direction parallel to the optical axis, and MAXL1 is the maximum thickness of the first lens element L1 from an optically effective area of ​​the first object-side surface 11 to an optically effective area of ​​the first image-side surface 12 in a direction parallel to the optical axis.

[0075] When this relationship is satisfied, the assembly sensitivity of the optical lens can be effectively reduced, thereby reducing the production difficulty of the first lens and further improving the yield of the first lens.

[0076] In some embodiments, the optical lens 100 satisfies the following relationship: 1≤MT*f≤5, and may further be: 1.285≤MT*f≤4.594, wherein MT is the average thickness of nine lenses from the first lens L1 to the ninth lens L9 on the optical axis, and f is the effective focal length of the optical lens 100.

[0077] When this relationship is satisfied, the thickness and focal length of each lens can be effectively balanced, thereby optimizing the molding process, reducing the lens processing difficulty of the optical lens, improving the processing yield, and facilitating the mass production of optical lenses.

[0078] In some embodiments, the optical lens 100 satisfies the following relationship: 5 mm -1 ≤MV / f≤15mm -1 , further can be 5.417mm -1 ≤MV / f≤12.97mm -1 , or 7.068mm -1 ≤MV / f≤12.97mm -1 : Wherein, MV is the average value of the Abbe numbers of the first lens L1 to the ninth lens L9, and f is the effective focal length of the optical lens 100.

[0079] When the above relationship is satisfied, the chromatic aberration of the optical lens can be effectively balanced, and high Abbe numbers and low Abbe numbers correspond to different refractive indices, so that the optical lens can improve its imaging performance by combining lenses of different materials, which is beneficial to improving the imaging quality of the optical lens.

[0080] In some embodiments, the optical lens 100 further satisfies the following relationship: 0≤AT / TTL≤0.5, and further may be: 0.153≤AT / TTL≤0.314, wherein AT is the sum of the air intervals between two adjacent lenses on the optical axis among the first lens L1 to the ninth lens L9.

[0081] By reasonably configuring the relationship between the sum of the air spaces between two adjacent lenses on the optical axis and the total length of the optical lens among the first lens to the ninth lens, the arrangement of the lenses of the optical lens can be made more compact, thereby effectively shortening the total length of the optical lens and meeting the miniaturization design requirements of the optical lens.

[0082] In some embodiments, the optical lens 100 further satisfies the following relationship: 1≤TTL / f≤2, and further may be: 1.174≤TTL / f≤1.567, where f is the effective focal length of the optical lens 100. By controlling the relationship between the total length of the optical lens and the effective focal length, the optical lens can balance the effective focal length of the optical lens while meeting the requirements of miniaturization design.

[0083] In some embodiments, the optical lens 100 further satisfies the following relationship: 0mm / deg≤f / FOV≤0.5mm / deg, and can further satisfy: 0.035mm / deg≤f / FOV≤0.151mm / deg, or 0.094mm / deg≤f / FOV≤0.151mm / deg, wherein f is the effective focal length of the optical lens 100, and FOV is the maximum field of view of the optical lens 100.

[0084] When the above relationship is satisfied, the effective focal length and the maximum field angle of the optical lens can be effectively balanced, so that the optical lens has a large field angle and the imaging range is increased.

[0085] In some embodiments, the optical lens 100 further satisfies the following relationship: 1≤TTL / IMGH≤3, and further 1.385≤TL / IMGH≤2.55: wherein IMGH is half of the image height corresponding to the maximum field of view of the optical lens 100 .

[0086] Controlling the relationship between the total length of the optical lens and half of the image height corresponding to the maximum field of view of the optical lens can be beneficial to achieving a miniaturized design of the optical lens. At the same time, IMGH determines the size of the electronic photosensitive chip. Satisfying the above relationship can enable the optical lens 100 to support high-pixel electronic photosensitive chips, thereby enabling the optical lens to have high pixels and meet the imaging quality requirements of the optical lens.

[0087] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0088] Embodiment 1

[0089] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows: Figure 1 As shown, the optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are arranged in sequence from the object side to the image side along the optical axis O.

[0090] The refractive power distribution of the above nine-piece lens is shown in Table 1 below:

[0091] Table 1

[0092] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just burden just burden burden just burden burden burden

[0093] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is convex at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is convex at the near optical axis, the third image side surface 32 is convex at the near optical axis, the fourth object side surface 41 is concave at the near optical axis, and the fourth image side surface 42 is concave at the near optical axis. The fifth object side surface 51 is concave at the near optical axis, the fifth image side surface 52 is convex at the near optical axis, the sixth object side surface 61 is concave at the near optical axis, the sixth image side surface 62 is convex at the near optical axis, the seventh object side surface 71 is concave at the near optical axis, and the seventh image side surface 72 is convex at the near optical axis. The eighth object side surface 81 is concave at the near optical axis, and the eighth image side surface 82 is concave at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0094] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is convex near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is concave near the circumference. The third object side surface 31 is convex near the circumference, and the third image side surface 32 is concave near the circumference. The fourth object side surface 41 is concave near the circumference, and the fourth image side surface 42 is convex near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is convex near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0095] Furthermore, the object side and image side of the nine lenses mentioned above are all aspherical surfaces. The parameter formula of the aspherical surface is:

[0096]

[0097] Where X is the relative distance between the point on the aspheric surface and the point tangent to the intersection point on the optical axis of the aspheric surface. Y is the vertical distance between the point on the aspheric curve and the optical axis. R is the radius of curvature, k is the cone coefficient, and Ai is the i-th order aspheric coefficient.

[0098] Furthermore, the nine lenses are all made of plastic, which helps to reduce the overall weight of the optical lens 100 and facilitates its lightweight design.

[0099] Specifically, taking the effective focal length f=4.45mm of the optical lens 100, the field of view FOV=82.2deg of the optical lens 100, the aperture number FNO=2.36, and the total length TTL=6.274mm of the optical lens as an example, other parameters of the optical lens 100 are given in the following Tables 2 and 3, respectively. Among them, the elements from the object side to the image side along the optical axis O of the optical lens 100 are arranged in the order of the elements from top to bottom in Table 2. In the same lens, the surface with a smaller surface number is the object side surface of the lens, and the surface with a larger surface number is the image side surface of the lens, such as the surface numbers 2 and 3 correspond to the first object side surface 11 and the first image side surface 12 of the first lens L1, respectively. The Y radius in Table 2 is the radius of curvature of the object side surface or image side surface of the corresponding surface number at the optical axis. The first value in the "Thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side of the lens to the next surface on the optical axis O. For example, when the aperture 102 is centrally located (i.e., between two lenses), the second value is the distance from the image side of the lens to the surface of the aperture 102. The value of the aperture 102 in the "Thickness" parameter column is the distance from the aperture 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O. When the value is negative, it indicates that the aperture 102 is set to the right side of the vertex of the next surface. If the thickness of the aperture 102 is a positive value, the aperture 102 is on the left side of the vertex of the next surface. Table 3 is a table of related parameters of the aspheric surface of each lens in Table 2, where k is the cone coefficient and Ai is the i-th order aspheric coefficient. In addition, the refractive index, Abbe number and focal length of each lens are all values ​​at a reference wavelength (eg, 587.5618 nm). It is understood that the units of the Y radius, thickness and focal length in Table 2 are all mm.

[0100] Table 2

[0101]

[0102]

[0103] Table 3

[0104]

[0105]

[0106] See also Figure 2 (A) Figure 2 (A) shows the spherical aberration curves of light of the optical lens 100 in the first embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Figure 2In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 (A) It can be seen that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0107] See also Figure 2 (B) Figure 2 (B) is the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Figure 2 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0108] See also Figure 2 (C) Figure 2 (C) is a distortion curve of the optical lens 100 in Example 1 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Figure 2 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0109] Embodiment 2

[0110] Please refer to Figure 3 , Figure 3 1 is a schematic diagram of the structure of an optical lens 100 according to the second embodiment of the present application. The optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are sequentially arranged along the optical axis O from the object side to the image side.

[0111] The refractive power distribution of the above nine-piece lens is shown in Table 4 below:

[0112] Table 4

[0113] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution burden just just burden burden burden just burden burden

[0114] Further, the first object side surface 11 is a concave surface at the near optical axis, the first image side surface 12 is a convex surface at the near optical axis, the second object side surface 21 is a convex surface at the near optical axis, and the second image side surface 22 is a convex surface at the near optical axis. The third object side surface 31 is a concave surface at the near optical axis, the third image side surface 32 is a convex surface at the near optical axis, the fourth object side surface 41 is a convex surface at the near optical axis, and the fourth image side surface 42 is a concave surface at the near optical axis. The fifth object side surface 51 is a convex surface at the near optical axis, the fifth image side surface 52 is a concave surface at the near optical axis, the sixth object side surface 61 is a concave surface at the near optical axis, the sixth image side surface 62 is a concave surface at the near optical axis, the seventh object side surface 71 is a convex surface at the near optical axis, and the seventh image side surface 72 is a convex surface at the near optical axis. The eighth object side surface 81 is a concave surface at the near optical axis, and the eighth image side surface 82 is a concave surface at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0115] Further, the first object side surface 11 is concave near the circumference, and the first image side surface 12 is convex near the circumference. The second object side surface 21 is concave near the circumference, and the second image side surface 22 is convex near the circumference. The third object side surface 31 is convex near the circumference, and the third image side surface 32 is convex near the circumference. The fourth object side surface 41 is convex near the circumference, and the fourth image side surface 42 is concave near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0116] The other parameters in the second embodiment are given in the following Table 5 and Table 6, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 5 are all mm.

[0117] Table 5

[0118]

[0119] Table 6

[0120]

[0121]

[0122] For further information, see Figure 4(A) shows the spherical aberration curves of the optical lens 100 in the second embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Figure 4 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 4 (A) It can be seen that the spherical aberration value of the optical lens 100 in the second embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0123] See also Figure 4 (B) Figure 4 (B) is the astigmatism diagram of the optical lens 100 in Example 2 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Figure 4 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0124] See also Figure 4 (C) Figure 4 (C) is a distortion curve of the optical lens 100 in Example 2 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Figure 4 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0125] Embodiment 3

[0126] Please refer to Figure 5 , Figure 5 The structure diagram of the optical lens 100 of the third embodiment of the present application is shown. The optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are arranged in sequence from the object side to the image side along the optical axis O.

[0127] The refractive power distribution of the above nine-piece lens is shown in Table 7 below:

[0128] Table 7

[0129] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just just burden just just burden just burden burden

[0130] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is convex at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is convex at the near optical axis, the third image side surface 32 is concave at the near optical axis, the fourth object side surface 41 is convex at the near optical axis, and the fourth image side surface 42 is concave at the near optical axis. The fifth object side surface 51 is convex at the near optical axis, the fifth image side surface 52 is concave at the near optical axis, the sixth object side surface 61 is concave at the near optical axis, the sixth image side surface 62 is convex at the near optical axis, the seventh object side surface 71 is concave at the near optical axis, and the seventh image side surface 72 is convex at the near optical axis. The eighth object side surface 81 is concave at the near optical axis, and the eighth image side surface 82 is concave at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0131] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is concave near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is concave near the circumference. The third object side surface 31 is convex near the circumference, and the third image side surface 32 is concave near the circumference. The fourth object side surface 41 is convex near the circumference, and the fourth image side surface 42 is convex near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0132] The other parameters in the third embodiment are given in the following Table 8 and Table 9, and the definitions of the parameters can be obtained from the above description, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 8 are all mm.

[0133] Table 8

[0134]

[0135]

[0136] Table 9

[0137]

[0138]

[0139] For further information, see Figure 6(A) shows the spherical aberration curves of the optical lens 100 in the third embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Figure 6 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 6 (A) It can be seen that the spherical aberration value of the optical lens 100 in the third embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0140] See also Figure 6 (B) Figure 6 (B) is the astigmatism diagram of the optical lens 100 in Example 3 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Figure 6 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0141] See also Figure 6 (C) Figure 6 (C) is a distortion curve of the optical lens 100 in Example 3 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the image height. Figure 6 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0142] Embodiment 4

[0143] See also Figure 7 , which is a schematic diagram of the structure of the optical lens 100 disclosed in the fourth embodiment of the present application. The optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are arranged in sequence from the object side to the image side along the optical axis O.

[0144] The refractive power distribution of the above nine-piece lens is shown in Table 10 below:

[0145] Table 10

[0146] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just just burden just burden just just burden burden

[0147] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is convex at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is concave at the near optical axis, the third image side surface 32 is concave at the near optical axis, the fourth object side surface 41 is convex at the near optical axis, and the fourth image side surface 42 is convex at the near optical axis. The fifth object side surface 51 is convex at the near optical axis, the fifth image side surface 52 is concave at the near optical axis, the sixth object side surface 61 is convex at the near optical axis, the sixth image side surface 62 is convex at the near optical axis, the seventh object side surface 71 is concave at the near optical axis, and the seventh image side surface 72 is convex at the near optical axis. The eighth object side surface 81 is concave at the near optical axis, and the eighth image side surface 82 is convex at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0148] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is concave near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is convex near the circumference. The third object side surface 31 is convex near the circumference, and the third image side surface 32 is concave near the circumference. The fourth object side surface 41 is convex near the circumference, and the fourth image side surface 42 is concave near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0149] The other parameters in the fourth embodiment are given in the following Table 11 and Table 12, and the definitions of the parameters can be obtained from the above description, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 11 are all mm.

[0150] Table 11

[0151]

[0152] Table 12

[0153]

[0154] For further information, see Figure 8 (A) shows the spherical aberration curves of the optical lens 100 in the fourth embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Figure 8 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 8 (A) It can be seen that the spherical aberration value of the optical lens 100 in the fourth embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0155] See also Figure 8 (B) Figure 8 (B) is the astigmatism diagram of the optical lens 100 in Example 4 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Figure 8 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0156] See also Figure 8 (C) Figure 8 (C) is a distortion curve of the optical lens 100 in Example 4 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Figure 8 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0157] Embodiment 5

[0158] See also Fig. 9 , which is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 5 of the present application. The optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are sequentially arranged along the optical axis O from the object side to the image side.

[0159] The refractive power distribution of the above nine-piece lens is shown in Table 13 below:

[0160] Table 13

[0161] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just just burden just burden just just just burden

[0162] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is convex at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is concave at the near optical axis, the third image side surface 32 is convex at the near optical axis, the fourth object side surface 41 is concave at the near optical axis, and the fourth image side surface 42 is convex at the near optical axis. The fifth object side surface 51 is convex at the near optical axis, the fifth image side surface 52 is concave at the near optical axis, the sixth object side surface 61 is convex at the near optical axis, the sixth image side surface 62 is concave at the near optical axis, the seventh object side surface 71 is concave at the near optical axis, and the seventh image side surface 72 is convex at the near optical axis. The eighth object side surface 81 is convex at the near optical axis, and the eighth image side surface 82 is concave at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0163] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is convex near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is concave near the circumference. The third object side surface 31 is concave near the circumference, and the third image side surface 32 is convex near the circumference. The fourth object side surface 41 is concave near the circumference, and the fourth image side surface 42 is convex near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0164] The other parameters in the fifth embodiment are given in the following Table 14 and Table 15, and the definitions of the parameters can be obtained from the above description, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 14 are all mm.

[0165] Table 14

[0166]

[0167]

[0168] Table 15

[0169]

[0170]

[0171] For further information, see Fig.10(A) shows the spherical aberration curves of the optical lens 100 in Example 5 at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Fig.10 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Fig.10 (A) It can be seen that the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0172] See also Fig.10 (B) Fig.10 (B) is the astigmatism diagram of the optical lens 100 in Example 5 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Fig.10 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0173] See also Fig.10 (C) Fig.10 (C) is a distortion curve of the optical lens 100 in Example 5 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Fig.10 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0174] Embodiment 6

[0175] See also Fig.11 , which is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 6 of the present application. The optical lens 100 includes an aperture 102, a first lens L1, a second lens L2, a third lens L3, an aperture 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are sequentially arranged along the optical axis O from the object side to the image side.

[0176] The refractive power distribution of the above nine-piece lens is shown in Table 16 below:

[0177] Table 16

[0178] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just burden just burden burden just just burden just

[0179] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is concave at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is concave at the near optical axis, the third image side surface 32 is convex at the near optical axis, the fourth object side surface 41 is concave at the near optical axis, and the fourth image side surface 42 is convex at the near optical axis. The fifth object side surface 51 is concave at the near optical axis, the fifth image side surface 52 is convex at the near optical axis, the sixth object side surface 61 is concave at the near optical axis, the sixth image side surface 62 is convex at the near optical axis, the seventh object side surface 71 is convex at the near optical axis, and the seventh image side surface 72 is concave at the near optical axis. The eighth object side surface 81 is concave at the near optical axis, and the eighth image side surface 82 is concave at the near optical axis. The ninth object-side surface 91 is a convex surface near the optical axis, and the ninth image-side surface 92 is a concave surface near the optical axis.

[0180] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is convex near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is concave near the circumference. The third object side surface 31 is concave near the circumference, and the third image side surface 32 is convex near the circumference. The fourth object side surface 41 is concave near the circumference, and the fourth image side surface 42 is convex near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0181] The other parameters in the sixth embodiment are given in the following Table 17 and Table 18, and the definitions of the parameters can be obtained from the above description, which will not be repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 17 are all mm.

[0182] Table 17

[0183]

[0184] Table 18

[0185]

[0186] For further information, see Fig.12 (A) shows the spherical aberration curves of the optical lens 100 in Example 6 at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Fig.12 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Fig.12 (A) It can be seen that the spherical aberration value of the optical lens 100 in the sixth embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0187] See also Fig.12 (B) Fig.12 (B) is the astigmatism diagram of the optical lens 100 in Example 6 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Fig.12 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0188] See also Fig.12 (C) Fig.12 (C) is a distortion curve of the optical lens 100 in Example 6 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Fig.12 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0189] Embodiment 7

[0190] See also Fig.13 , which is a schematic diagram of the structure of the optical lens 100 disclosed in Embodiment 7 of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, an infrared filter 103 and an imaging surface 101, which are sequentially arranged along the optical axis O from the object side to the image side.

[0191] The refractive power distribution of the above nine-piece lens is shown in Table 19 below:

[0192] Table 19

[0193] Lens code L1 L2 L3 L4 L5 L6 L7 L8 L9 Refractive force distribution just burden just burden burden burden just burden burden

[0194] Further, the first object side surface 11 is convex at the near optical axis, the first image side surface 12 is concave at the near optical axis, the second object side surface 21 is convex at the near optical axis, and the second image side surface 22 is concave at the near optical axis. The third object side surface 31 is convex at the near optical axis, the third image side surface 32 is convex at the near optical axis, the fourth object side surface 41 is concave at the near optical axis, and the fourth image side surface 42 is convex at the near optical axis. The fifth object side surface 51 is concave at the near optical axis, the fifth image side surface 52 is convex at the near optical axis, the sixth object side surface 61 is concave at the near optical axis, the sixth image side surface 62 is convex at the near optical axis, the seventh object side surface 71 is convex at the near optical axis, and the seventh image side surface 72 is concave at the near optical axis. The eighth object side surface 81 is convex at the near optical axis, and the eighth image side surface 82 is concave at the near optical axis. The ninth object-side surface 91 is a concave surface near the optical axis, and the ninth image-side surface 92 is a convex surface near the optical axis.

[0195] Further, the first object side surface 11 is convex near the circumference, and the first image side surface 12 is convex near the circumference. The second object side surface 21 is convex near the circumference, and the second image side surface 22 is concave near the circumference. The third object side surface 31 is convex near the circumference, and the third image side surface 32 is convex near the circumference. The fourth object side surface 41 is concave near the circumference, and the fourth image side surface 42 is convex near the circumference. The fifth object side surface 51 is concave near the circumference, and the fifth image side surface 52 is convex near the circumference. The sixth object side surface 61 is concave near the circumference, and the sixth image side surface 62 is convex near the circumference. The seventh object side surface 71 is concave near the circumference, and the seventh image side surface 72 is convex near the circumference. The eighth object side surface 81 is concave near the circumference, and the eighth image side surface 82 is convex near the circumference. The ninth object-side surface 91 is concave near the circumference, and the ninth image-side surface 92 is convex near the circumference.

[0196] The other parameters in the seventh embodiment are given in the following Table 20 and Table 21, and the definitions of the parameters can be obtained from the above description, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 20 are all mm.

[0197] Table 20

[0198]

[0199] Table 21

[0200]

[0201]

[0202] For further information, see Fig.14(A) shows the spherical aberration curves of the optical lens 100 in Example 7 at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000nm. Fig.14 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Fig.14 (A) It can be seen that the spherical aberration value of the optical lens 100 in the seventh embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0203] See also Fig.14 (B) Fig.14 (B) is the astigmatism diagram of the optical lens 100 in Example 7 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height. The astigmatism curve represents the meridian imaging surface curvature T and the sagittal imaging surface curvature S, which is represented by Fig.14 (B) It can be seen that the astigmatism of the optical lens 100 is well compensated.

[0204] See also Fig.14 (C) Fig.14 (C) is a distortion curve of the optical lens 100 in Example 7 at a wavelength of 587.5618 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height. Fig.14 (C) It can be seen that at a wavelength of 587.5618 nm, the distortion of the optical lens 100 is well corrected.

[0205] Please refer to Table 22, which is a summary table of values ​​satisfied by each relationship in Examples 1 to 7 of the present application.

[0206] Table 22

[0207]

[0208]

[0209] See also Fig.15The present application also discloses a camera module 200, which includes an electronic photosensitive chip 201 and an optical lens 100 as described in any one of the above embodiments 1 to 7, wherein the electronic photosensitive chip 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used to receive the light signal of the object and project it to the electronic photosensitive chip 201, and the electronic photosensitive chip 201 is used to convert the light signal corresponding to the object into an image signal. It can be understood that the camera module 200 with the above optical lens 100 has all the technical effects of the above optical lens 100, that is, while satisfying the miniaturized design, the total length of the optical lens 100 can be shortened and the amount of light entering the optical lens can be increased to improve the imaging quality of the optical lens 100.

[0210] See also Fig.16 The present application also discloses an electronic device 300, which includes a housing 301 and the above-mentioned camera module 200, and the camera module 200 is arranged in the housing 301. Among them, the electronic device 300 can be but not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, etc. It can be understood that the electronic device 300 with the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, while satisfying the miniaturization design, the total length of the optical lens 100 can also be shortened and the amount of light entering the optical lens 100 can also be increased to improve the imaging quality of the optical lens 100.

[0211] The optical lens, camera module and electronic device disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the optical lens, camera module and electronic device of the present invention and their core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An optical lens, characterized in that: There are nine lenses with refractive power in total, and the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are arranged in sequence from the object side to the image side along the optical axis and have refractive power; The optical lens satisfies the following relationship: 2≤TTL / EPD≤4, 0.821≤f12 / f≤2, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, EPD is the entrance pupil diameter of the optical lens, f12 is the combined focal length of the first lens and the second lens, and f is the effective focal length of the optical lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.071≤BFL / TTL≤0.5; Wherein, BFL is the shortest distance from the image side surface of the ninth lens to the imaging surface of the optical lens parallel to the optical axis.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.516≤MINL1 / MAXL1≤1; Wherein, MINL1 is the minimum thickness from the object side optical effective area of ​​the first lens to the image side optical effective area of ​​the first lens in the direction parallel to the optical axis, and MAXL1 is the maximum thickness from the object side optical effective area of ​​the first lens to the image side optical effective area of ​​the first lens in the direction parallel to the optical axis.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1≤MT*f≤5; Wherein, MT is the average value of the thickness of the nine lenses from the first lens to the ninth lens on the optical axis, and f is the effective focal length of the optical lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 5mm -1 ≤MV / f≤15mm -1 ; Wherein, MV is the average value of the Abbe numbers of the first lens to the ninth lens, and f is the effective focal length of the optical lens.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.153≤AT / TTL≤0.5; Wherein, AT is the sum of the air spaces between two adjacent lenses on the optical axis among the first lens to the ninth lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1.174≤TTL / f≤1.567; Wherein, f is the effective focal length of the optical lens.

8. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 0.035mm / deg≤f / FOV≤0.5mm / deg; Wherein, f is the effective focal length of the optical lens, and FOV is the maximum field of view of the optical lens.

9. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: 1.385≤TTL / IMGH≤3, wherein IMGH is half of the image height corresponding to the maximum field angle of the optical lens.

10. A camera module, characterized in that: The camera module includes an electronic photosensitive chip and an optical lens as described in any one of claims 1 to 9, and the electronic photosensitive chip is arranged on the image side of the optical lens.

11. An electronic device, characterized in that: The electronic device includes a housing and a camera module as described in claim 10, and the camera module is arranged in the housing.

Images