Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from a first side to a second side along an optical axis, wherein the first lens has negative focal power; the second lens has positive focal power, and at least one of two side surfaces of the second lens is a convex surface; the third lens has positive focal power, and the first side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side surface and the second side surface of the fourth lens are respectively a convex surface and a concave surface; the first side surface and the second side surface of the fifth lens are respectively a convex surface and a concave surface; the number of the lenses with focal power in the optical lens is five; the total effective focal length F of the optical lens and the effective focal lengths F2, F3, F4 and F5 of the second to fifth lenses meet the condition that 0.4 < = F / F2 + F / F3 + F / F4 + F / F5 < = 1.2; the distance T12 between the first lens and the second lens on the optical axis and the distance TTL between the center of the first side face of the first lens and the imaging face on the optical axis meet the condition that T12 / TTL is larger than or equal to 0.09 and smaller than or equal to 0.4.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens and an electronic device. Background Art

[0002] In recent years, optical lens technology has been continuously developing and improving. Optical lenses are increasingly widely used in many fields including smart phones, security monitoring, car assisted driving, intelligent detection and virtual reality. Among them, in the application of the automotive field, LiDAR lenses are key components for automatic driving assistance systems to obtain external information. With the rapid development of automatic driving assistance systems, people's demand for LiDAR lenses is also increasing, and LiDAR lenses are continuously developing in the direction of high resolution and miniaturization.

[0003] In order to meet the requirements of safe driving and special installation locations, the LiDAR lenses in the automated driving assistance system need to meet more special requirements than ordinary optical lenses. For example, in order to achieve long-distance measurement, the light throughput of the receiving end lens module needs to be increased, which requires a larger aperture and a small FNO. However, existing optical lenses still have many shortcomings and need to be improved and enhanced. For example, existing optical lenses often have low light throughput, which limits the detection distance of LiDAR. Existing optical lenses usually cannot simultaneously meet the requirements of small apertures under small FNO conditions. In addition, existing optical lenses usually also find it difficult to simultaneously meet the requirements of high resolution under small FNO conditions. Therefore, optical lenses with some or all of the performance such as high resolution, miniaturization, small FNO, and short back focus are currently the direction of research and development and design by technicians in this field. Summary of the invention

[0004] The present application provides an optical lens, which may include, in order from the first side to the second side along the optical axis: a first lens with negative optical power, at least one of the first side and the second side is a concave surface; a second lens with positive optical power, at least one of the first side and the second side is a convex surface; a third lens with positive optical power, the first side of which is a convex surface; a fourth lens with positive optical power, the first side of which is a convex surface and the second side is a concave surface; and a fifth lens with optical power, the first side of which is a convex surface and the second side is a concave surface. The number of lenses with optical power in the optical lens is five. The total effective focal length F of the optical lens and the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: 0.4≤F / F2+F / F3+F / F4+F / F5≤1.2; the distance T12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and the distance TTL from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis may satisfy: 0.09≤T12 / TTL≤0.4.

[0005] In one embodiment, the first side surface and the second side surface of the first lens are respectively concave and convex, or respectively concave and concave, or respectively convex and concave, or respectively concave and flat. The first side surface and the second side surface of the second lens are respectively concave and convex, or respectively convex and concave, or respectively convex and convex. The second side surface of the third lens is convex or concave. The fifth lens has positive power or negative power.

[0006] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.5≤F / ENPD≤1.2; 0.15≤TTL / H / FOV≤0.3; BFL / TTL≤0.2; D / H / FOV≤0.15; D / H / F≤0.25; -0.1≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.05; 0.2≤(F×θ) / D≤0.5; (FOV×F) / H≥50; 1.55≤FOV / F≤2.1; wherein , F is the total effective focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface on the optical axis, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

[0007] In one embodiment, the optical lens may satisfy at least one of the following conditions: -8≤F1 / F≤-1; -8≤|R1| / F1≤-0.2; 1.2≤D / D10≤3.5; 2≤D / H≤10; 1.2≤|F1 / T12|≤8; wherein F1 is the effective focal length of the first lens, F is the total effective focal length of the optical lens, R1 is the radius of curvature of the first side surface of the first lens, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, D10 is the maximum effective aperture of the second side surface of the fifth lens, H is the image height corresponding to the maximum field of view of the optical lens, and T12 is the distance from the second side surface of the first lens to the first side surface of the second lens on the optical axis.

[0008] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: 2.5≤F2 / F≤25.

[0009] In one embodiment, the optical lens may satisfy at least one of the following conditions: 1.5≤F3 / F≤12; 0.2≤R5 / F3≤1.8; wherein F3 is the effective focal length of the third lens, F is the total effective focal length of the optical lens, and R5 is the radius of curvature of the first side surface of the third lens.

[0010] In one embodiment, the optical lens may satisfy at least one of the following conditions: 1≤F4 / F≤8.5; 0.2≤R8 / TTL≤4.5; 0.05≤R7 / (CT4+R8)≤1; wherein, F4 is the effective focal length of the fourth lens, F is the total effective focal length of the optical lens, R7 is the curvature radius of the first side surface of the fourth lens, R8 is the curvature radius of the second side surface of the fourth lens, CT4 is the center thickness of the fourth lens on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis.

[0011] In one embodiment, the optical lens may satisfy at least one of the following conditions: 1.5≤|F5| / F≤12; 0.12≤R10 / TTL≤0.9; 3≤D10×BFL / H≤26; 0.3≤R9 / (CT5+R10)≤7.5; wherein, F5 is the effective focal length of the fifth lens, F is the total effective focal length of the optical lens, R9 is the radius of curvature of the first side surface of the fifth lens, R10 is the radius of curvature of the second side surface of the fifth lens, TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, D10 is the maximum effective clear aperture of the second side surface of the fifth lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface on the optical axis, H is the image height corresponding to the maximum field of view angle of the optical lens, and CT5 is the center thickness of the fifth lens on the optical axis.

[0012] In one embodiment, the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens may satisfy: 3≤(F2+F3+F4) / 3 / F≤12.

[0013] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.45≤φ25 / φ≤0.99; 0.02≤(T23+T34+T45) / TTL≤0.55; wherein φ25 is the combined optical power value of the second lens, the third lens, the fourth lens and the fifth lens, φ is the total optical power value of the optical lens, T23 is the distance from the second side surface of the second lens to the first side surface of the third lens on the optical axis, T34 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, and T45 is the distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis.

[0014] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.03≤R7 / R9≤2.5; 1≤R8 / R10≤25; wherein R7 is the radius of curvature of the first side surface of the fourth lens, R9 is the radius of curvature of the first side surface of the fifth lens, R8 is the radius of curvature of the second side surface of the fourth lens, and R10 is the radius of curvature of the second side surface of the fifth lens.

[0015] In one embodiment, a distance T23 from the second side surface of the second lens to the first side surface of the third lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: 0≤T23 / TTL≤0.15.

[0016] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens may satisfy: 1.5≤F / H≤2.2.

[0017] In one embodiment, a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens may satisfy: 2.8≤TTL / F≤5.5.

[0018] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.5≤F / F2+F / F3+F / F4+F / F5≤1.13; 0.12≤T12 / TTL≤0.31; 0.7≤F / ENPD≤1.1; 0.18≤TTL / H / FOV≤0.27; 0.04≤BFL / TTL≤0.16; 0.07≤D / H / FOV≤0.12; 0.14≤D / H / F ≤0.21; -0.05≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.025; 0.27≤(F×θ) / D≤0.42; 55≤(FOV×F) / H≤60; 1.7≤FO V / F≤1.9; -4.7≤F1 / F≤-1.4; -7≤|R1| / F1≤-0.27; 1.6≤D / D10≤3.1; 2.4≤D / H≤9.1; 1.6≤|F1 / T12| ≤6; 3≤F2 / F≤21.5; 2.5≤F3 / F≤9; 0.23≤R5 / F3≤1.4; 1.44≤F4 / F≤7.5; 0.25≤R8 / TTL≤3.8; 0.07≤R7 / (CT4+R8)≤0.75; 2≤|F5| / F≤9; 0.15≤R10 / TTL≤0.5; 4.2≤D10×BFL / H≤23.5; 0.5≤R9 / (CT5+R10) ≤6.6; 3.6≤(F2+F3+F4) / 3 / F≤9; 0.6≤φ25 / φ≤0.96; 0.05≤(T23+T34+T45) / TTL≤0.44; 0.07≤R7 / R9≤2; 1.3≤R8 / R10≤19; 0.001≤T23 / TTL≤0.12; 1.7≤F / H≤1.89; 3.25≤TTL / F≤4.8; The meaning of each parameter is the same as above.

[0019] On the other hand, the present application provides an electronic device, which includes an optical lens provided by the present application and an imaging element for converting an optical image or optical information formed by the optical lens into an electrical signal, wherein the imaging element is located on the second side of the optical lens, and light from the first side forms an image on the second side after passing through the optical lens. Alternatively, the electronic device includes an optical lens and a light source provided by the present application, wherein the light source is located on the second side of the optical lens, and light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

[0020] According to an exemplary embodiment of the present application, the optical lens includes five lenses with optical power, which are first to fifth lenses arranged in sequence from the first side to the second side along the optical axis, wherein the first lens has negative optical power, and at least one of the first side surface and the second side surface thereof is a concave surface; the second lens has positive optical power, and at least one of the first side surface and the second side surface thereof is a convex surface; the third lens has positive optical power, and the first side surface thereof is a convex surface; the fourth lens has positive optical power, and the first side surface thereof is a convex surface, and the second side surface is a concave surface; the fifth lens has optical power, and the first side surface thereof is a convex surface, and the second side surface is a concave surface; the total effective focal length F of the optical lens and the effective focal lengths F2, F3, F4 and F5 of the second to fifth lenses satisfy the conditional formula 0.4≤F / F2+F / F3+F / F4+F / F5≤1.2; the distance T12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy the conditional formula 0.09≤T12 / TTL≤0.4. By setting the lens in this way, the focal length distribution of the second to fifth lenses can be reasonably controlled, so that the light diverged by the first lens can be smoothly converged onto the image plane under the action of the second to fifth lenses, which can reduce the sensitivity of the lens and improve the resolution; by reasonably controlling the distance from the second side surface of the first lens to the first side surface of the second lens, the light can be appropriately diverged and the light can move smoothly, which is beneficial to improve the resolution while reducing the sensitivity of the first lens.

[0021] The optical lens according to the exemplary embodiment of the present application adopts a five-piece lens architecture. By reasonably setting parameters such as the lens optical power, surface shape, curvature radius, center thickness, and air spacing between lenses on the optical axis, the optical lens can have one or more beneficial effects such as high resolution, miniaturization, small FNO and short back focus, so that the optical lens can better meet the high requirements of automotive applications such as lidar lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of the embodiments in conjunction with the accompanying drawings. In the accompanying drawings: Figures 1 to 29 They are schematic diagrams showing the structures of optical lenses according to Embodiments 1 to 29 of the present application respectively; Fig.30 , Fig.31 and Fig.32 1 and 2 respectively show an optical point diagram, an MTF diagram, and a diffraction circle inclusion energy diagram of the optical lens according to Example 3 of the present application; Fig.33 , Fig.34 and Fig.35 10 respectively show an optical point diagram, an MTF diagram, and a diffraction circle inclusion energy diagram of the optical lens according to Example 10 of the present application; Fig.36 , Fig.37 and Fig.38 10 respectively show an optical point diagram, an MTF diagram, and a diffraction circle inclusion energy diagram of the optical lens according to Example 12 of the present application; Fig.39 , Fig.40 and Fig.41 10 are respectively an optical point diagram, an MTF diagram, and a diffraction circle inclusion energy diagram of the optical lens according to Example 14 of the present application; Fig.42 , Fig.43 and Fig.44 10 respectively show an optical point diagram, an MTF diagram, and a diffraction circle energy diagram of the optical lens according to Example 19 of the present application; Fig.45 , Fig.46 and Fig.47 1 and 2 respectively show the optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens according to Example 23 of the present application. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0025] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0026] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens.

[0027] It should be understood that the optical lens provided in this application can be used for both video and projection, and can also be used for laser radar lenses. When the optical lens provided in this application is used for a video lens or a laser radar receiving end lens, the video lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc., and the "first side" involved in this article can refer to the object side, and the "second side" can refer to the image side, and the light from the object side can be imaged on the image side; when the optical lens provided in this application is used for a projection lens or a radar transmitting end lens, the "first side" involved in this article can refer to the object side, and the "second side" can refer to the light source side, and the light from the light source side is projected to the first side after passing through the optical lens, and forms an image or illuminates the area on the first side.

[0028] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0029] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] The features, principles and other aspects of the present application are described in detail below.

[0032] In an exemplary embodiment, the optical lens includes, for example, five lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses may be arranged in sequence from the first side to the second side along the optical axis.

[0033] In an exemplary embodiment, the first side may be, for example, the object side, and the second side may be, for example, the image side. Accordingly, the first side surface of each lens in the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may be the object side surface of each lens, and the second side surface of each lens may be the image side surface of each lens.

[0034] In an exemplary embodiment, the optical lens may further include an imaging surface and a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0035] In an exemplary embodiment, the optical lens of the present application may further include a filter and / or a protective glass disposed between the fifth lens and the imaging surface as required. The filter may filter light having a specific wavelength, and the protective glass may prevent the second side element (e.g., chip) of the optical lens from being damaged.

[0036] In an exemplary embodiment, the first lens may have a negative optical power. The first lens may have a concave-convex surface type. The first lens has a negative optical power and has a divergent effect on the light passing through it. Under the same field of view angle, the light emitted from the image side of the first lens can make the subsequent optical system have a larger light receiving surface. The object side of the first lens is a concave surface, which can make the collected light enter the rear optical system in a divergent form as much as possible, and at the same time effectively reduce the angle between the edge field of view light and the first side when it is incident, and improve the relative illumination of the edge of the lens as a whole; the image side of the first lens is a convex surface, which can make the light enter the rear optical system as smoothly as possible, which is beneficial to the low sensitivity of the system and the small front aperture. In addition, the object side of the first lens is a concave surface, which can also avoid contact and friction between the lens and other objects, which is beneficial to the protection of the lens and the film layer. In an exemplary embodiment, the first lens may also have a concave plane type, with the first side being a concave surface and the second side being a plane.

[0037] In an exemplary embodiment, the first lens may have negative power. The first lens may have a concave-concave surface. The first lens is a negative power lens, and the lens shape is biconcave, which is conducive to collecting field light, increasing luminous flux, and diffusing light to the rear.

[0038] In an exemplary embodiment, the first lens may have a negative optical focal length. The first lens may have a convex-concave surface. The first lens has a negative optical focal length and has the function of diverging light, and can disperse the central light and the edge light of each field of view. Under the same field of view angle, the light emitted from the image side of the first lens can enable the rear optical system to have a larger light receiving surface, so that the physical aperture of the aperture is expanded, and a larger amount of light is input, which is beneficial to increase the illumination of the picture. The object side of the first lens is designed to be a convex surface, which cooperates with the image side as a concave surface, so that the light emitted from the first lens is smoothly incident to the rear, which is beneficial to reduce sensitivity. In addition, the object side of the first lens is designed to be a convex surface, which can also be beneficial to the sliding of water droplets and the like in practical applications, reducing the impact on imaging.

[0039] In an exemplary embodiment, the second lens may have positive power. The second lens may have a concave-convex surface. The second lens has positive power, and the object side is concave, which is conducive to proper diffusion of light, better receiving the light diverging from the first lens, reducing the deflection of light, and the shape is a meniscus so that the light converges to the second lens to a certain extent. The second lens plays the role of receiving the front and rear optical systems in the entire system, so that the light entering the front optical system is deflected at a smaller angle, while better correcting the aberration, ensuring the low sensitivity of the system and improving the resolution.

[0040] In an exemplary embodiment, the second lens may have positive power. The second lens may have a convex-concave surface. The second lens has positive power, the object side surface is convex, and can collect as much light as possible to enter the rear optical system, and the image side surface is concave, which can make the light enter the rear optical system as smoothly as possible, which is beneficial to the low sensitivity of the system and the small front aperture.

[0041] In an exemplary embodiment, the second lens may have positive optical power. The second lens may have a convex-convex surface. The second lens has positive optical power, the object side surface is convex, and can collect as much light as possible to enter the rear optical system, and the image side surface is convex, which can quickly transition the light to the rear optical system and reduce the system aperture.

[0042] In an exemplary embodiment, the third lens may have positive power. The third lens may have a convex-concave surface. The third lens has positive power, and the object side surface is convex, which can collect as much light as possible to enter the rear optical system, and the image side surface is concave, which can make the light enter the rear optical system as smoothly as possible, which is beneficial to the low sensitivity of the system and the small front aperture.

[0043] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. The third lens has positive optical power, the object side surface is convex, and can collect as much light as possible to enter the rear optical system, and the image side surface is convex, which can quickly transition the light to the rear optical system and reduce the system aperture.

[0044] In an exemplary embodiment, the fourth lens may have positive power. The fourth lens may have a convex-concave surface. The fourth lens has positive power, the object side surface is convex, and can collect as much light as possible to enter the rear optical system, and the image side surface is concave, which can make the light enter the rear optical system as smoothly as possible, which is beneficial to the low sensitivity of the system and the small front aperture.

[0045] In an exemplary embodiment, the fifth lens may have a negative optical power. The fifth lens may have a convex-concave surface. The fifth lens has a negative optical power and a convex-concave shape, which can properly diverge light, and is matched with the positive optical power of the fourth lens, which is conducive to the smooth entry of light into the rear optical system. The object side of the fifth lens is designed to be a convex surface, so that the light converges quickly, the total length of the system is reduced as much as possible, and miniaturization is achieved; the image side of the fifth lens is designed to be a concave surface, which is conducive to the smooth trend of light, and at the same time, it is conducive to adjusting the optical path difference between light rays of different fields of view, which is conducive to achieving small distortion, paving the way for subsequent light rays to converge better to the image plane, and achieving high resolution.

[0046] In an exemplary embodiment, the fifth lens may have positive power. The fifth lens may have a convex-concave surface. The fifth lens has positive power and a convex-concave shape, which can appropriately converge light, and is matched with the positive power of the fourth lens, which is conducive to the smooth entry of light into the rear optical system. The object side of the fifth lens is designed to be a convex surface, which can make the light converge quickly, minimize the total length of the system as much as possible, and achieve miniaturization; the image side of the fifth lens is designed to be a concave surface, which can be conducive to the smooth trend of light, and at the same time, it is conducive to adjusting the optical path difference between light rays of different fields of view, which is conducive to achieving small distortion, paving the way for subsequent light rays to converge better to the image plane, and achieving high resolution.

[0047] In an exemplary embodiment, the optical lens may further include an aperture. The aperture may constrain the light path and control the light intensity. The aperture may be set at an appropriate position of the optical lens, for example, the aperture may be located between the third lens and the fourth lens; or, the aperture may be located between the second lens and the third lens, for example; or, the aperture may be located between the first lens and the second lens, for example. Reasonable setting of the position of the aperture may facilitate the effective and smooth transition of light entering the optical system to the rear end of the system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be set at other positions according to actual needs.

[0048] In an exemplary embodiment, one or more aspherical lenses may be included in the first to fifth lenses. Aspherical mirror surfaces have different curvatures at different positions, which can adjust the light trend to converge to the image plane, have better curvature radius characteristics, can effectively correct aberrations and field curvatures, and improve the resolution of the optical system; can improve distortion aberrations and improve astigmatism aberrations, eliminate aberrations that occur during imaging as much as possible, and improve the imaging quality of the lens. For example, in some embodiments, the fifth lens may be an aspherical lens; in some embodiments, the first lens may also be an aspherical lens; in some embodiments, the fourth lens may also be an aspherical lens. The present application does not specifically limit the number of spherical lenses and aspherical lenses. When focusing on the resolution quality, the number of aspherical lenses may be increased. In particular, in order to improve the resolution quality of the optical system, the first to fifth lenses may all be aspherical lenses.

[0049] In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens and the fifth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid problems such as lens imaging blur caused by high and low temperature changes in the use environment and affecting the normal use of the lens. Specifically, when focusing on temperature performance and resolution quality, the first lens to the fifth lens may all be glass aspherical lenses. In applications where temperature stability requirements are lower, the first lens to the fifth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the fifth lens in the optical lens may also be made of a combination of plastic and glass.

[0050] In an exemplary embodiment, the first side surface of the fifth lens may have an inflection point. By this arrangement, aberrations can be effectively corrected.

[0051] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.4≤F / F2+F / F3+F / F4+ F / F5≤1.2, wherein F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. By controlling this conditional expression and rationally controlling the focal length distribution of the second to fifth lenses, the light rays diverged by the first lens can be smoothly converged to the image plane under the action of the second to fifth lenses, which is beneficial to reducing the sensitivity of the lens and improving the resolution. More specifically, F and F2, F3, F4 and F5 can further satisfy: 0.5≤F / F2+F / F3+F / F4+F / F5≤1.13. By controlling the conditional expression within this range, the light rays diverged by the first lens can be more smoothly converged to the image plane under the action of the second to fifth lenses, which is further beneficial to reducing the sensitivity of the lens and improving the resolution.

[0052] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.09≤T12 / TTL≤0.4, wherein TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, and T12 is the distance from the second side of the first lens to the first side of the second lens on the optical axis. By controlling this conditional expression and rationally controlling the distance from the image side of the first lens to the object side of the second lens, the light can be appropriately diverged to make the light trend smoother, which is beneficial to improving the resolution while reducing the sensitivity of the first lens. More specifically, T12 and TTL may further satisfy: 0.12≤T12 / TTL≤0.31. By controlling the conditional expression within this range, the light can be appropriately diverged to make the light trend smoother, which is further beneficial to improving the resolution while reducing the sensitivity of the first lens.

[0053] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.5≤F / ENPD≤1.2, where F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. By controlling this conditional expression, it is beneficial to achieve a small FNO of the lens and to increase the amount of light entering. More specifically, F and ENPD may further satisfy: 0.7≤F / ENPD≤1.1. By controlling the conditional expression within this range, it is more beneficial to achieve a small FNO of the lens and further to increase the amount of light entering.

[0054] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.15≤TTL / H / FOV≤0.3, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling this conditional expression, the relationship between the total optical length, image height and maximum field of view of the optical lens can be reasonably controlled, so as to achieve miniaturization and a large image surface of the optical lens. More specifically, TTL, H and FOV can further satisfy: 0.18≤TTL / H / FOV≤0.27. By controlling the conditional expression within this range, it can be more conducive to achieving miniaturization and a large image surface of the optical lens.

[0055] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TTL≤0.2, wherein BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface on the optical axis, and TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. By controlling this conditional expression, a short back focus of the lens can be achieved, which is conducive to miniaturization of the lens while ensuring space for installation and focusing of optical elements. More specifically, BFL and TTL may further satisfy: 0.04≤BFL / TTL≤0.16. By controlling the conditional expression within this range, it is more conducive to achieving a short back focus of the lens, which is further conducive to miniaturization of the lens while ensuring space for installation and focusing of optical elements.

[0056] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV≤0.15, wherein FOV is the maximum field of view of the optical lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling this conditional expression, the relationship between the maximum aperture, image height and maximum field of view of the object side of the first lens can be reasonably controlled, so that the miniaturization and large image surface of the optical lens can be achieved. More specifically, D, H and FOV can further satisfy: 0.07≤D / H / FOV≤0.12. By controlling the conditional expression within this range, it is more conducive to achieving the miniaturization and large image surface of the optical lens.

[0057] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / F≤0.25, wherein D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression and rationally controlling the relationship between the maximum aperture of the object side of the first lens, the image height, and the focal length of the lens, the lens may have the characteristics of a long focal length, a large image height, and a small size. More specifically, D, H, and F may further satisfy: 0.14≤D / H / F≤0.21. By controlling the conditional expression within this range, it may be more conducive to realizing the characteristics of a lens having a long focal length, a large image height, and a small size.

[0058] In an exemplary embodiment, the optical lens according to the present application may satisfy: -0.1≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.05, wherein H is the image height corresponding to the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view angle of the optical lens. By controlling this conditional expression, when the field of view angle is the same, the difference between the ideal image height and the actual image height of the lens is small, thereby reducing lens distortion. More specifically, H, F, and θ may further satisfy: -0.05≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.025. By controlling the conditional expression within this range, lens distortion can be better reduced.

[0059] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤(F×θ) / D≤0.5, wherein F is the total effective focal length of the optical lens, θ is the arc value of the maximum field angle of the optical lens, and D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field angle of the optical lens. By controlling this conditional expression, the aperture of the front end of the lens can be made small, which is beneficial to reducing the volume of the lens. More specifically, F, θ and D can further satisfy: 0.27≤(F×θ) / D≤0.42. By controlling the conditional expression within this range, the small aperture of the front end of the lens can be better achieved, which is more conducive to reducing the volume of the lens.

[0060] In an exemplary embodiment, the optical lens according to the present application may satisfy: (FOV×F) / H≥50, wherein FOV is the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. By controlling this conditional expression, the relationship between the field of view angle, focal length, and image height can be adjusted, which is beneficial for the lens to achieve long-distance detection and a suitable detection field of view. More specifically, FOV, F, and H may further satisfy: 55≤(FOV×F) / H≤60. By controlling the conditional expression within this range, it may be further beneficial for the lens to achieve long-distance detection and a suitable detection field of view.

[0061] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.55≤FOV / F≤2.1, where FOV is the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the field of view and focal length values ​​of the entire lens group can be reasonably controlled, so that the lens can achieve the effect of telephoto measurement of long distances. More specifically, FOV and F can further satisfy: 1.7≤FOV / F≤1.9. By controlling the conditional expression within this range, the effect of telephoto measurement of long distances can be better achieved.

[0062] In an exemplary embodiment, the optical lens according to the present application may satisfy: -8≤F1 / F≤-1, wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression and rationally controlling the focal length value of the first lens, the light can be smoothly diverged after passing through the first lens, thereby improving the resolution. More specifically, F1 and F can further satisfy: -4.7≤F1 / F≤-1.4. By controlling the conditional expression within this range, the light can be more smoothly diverged after passing through the first lens, which is more conducive to improving the resolution.

[0063] In an exemplary embodiment, the optical lens according to the present application can satisfy: -8≤|R1| / F1≤-0.2, where R1 is the radius of curvature of the first side of the first lens, and F1 is the effective focal length of the first lens. By controlling this conditional expression, the radius of curvature of the object side of the first lens can be reasonably controlled. When it is a convex surface, the rear optical system can have a larger light receiving surface, so that the physical aperture of the aperture is expanded, and a larger amount of light is achieved, which is conducive to increasing the illumination of the picture; when the object side of the first lens is a concave surface, it has the function of diverging light, which can increase the incident angle of large-angle incident light, thereby increasing the deflection angle of light in the lens, which is conducive to collecting light as much as possible and increasing the amount of light entering. More specifically, R1 and F1 can further satisfy: -7≤|R1| / F1≤-0.27. By controlling the conditional expression within this range, when the object side of the first lens is convex, the rear optical system can further have a larger light receiving surface, so that the physical aperture of the aperture is expanded, a larger amount of light entering is achieved, and it is further beneficial to increase the illumination of the picture; when the object side of the first lens is concave, the incident angle of large-angle incident light can be further increased, thereby increasing the deflection angle of light in the lens, which is more conducive to collecting light as much as possible and further increasing the amount of light entering.

[0064] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.2≤D / D10≤3.5, wherein D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and D10 is the maximum effective aperture of the second side of the fifth lens. By controlling this conditional expression, the effective aperture at the front end of the lens is close to the effective aperture at the rear end, which is beneficial to reducing the lens aperture and the size of the lens. More specifically, D and D10 may further satisfy: 1.6≤D / D10≤3.1. By controlling the conditional expression within this range, the effective aperture at the front end of the lens can be closer to the effective aperture at the rear end, which is further beneficial to reducing the lens aperture and the size of the lens.

[0065] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2≤D / H≤10, wherein D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling this conditional expression, under the condition of the same imaging plane and the same image height, the effective aperture of the front end of the lens can be made smaller, which is beneficial to reducing the size of the lens. More specifically, D and H may further satisfy: 2.4≤D / H≤9.1. By controlling the conditional expression within this range, under the condition of the same imaging plane and the same image height, the effective aperture of the front end of the lens can be made smaller, which is further beneficial to reducing the size of the lens.

[0066] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.2≤|F1 / T12|≤8, wherein F1 is the effective focal length of the first lens, and T12 is the distance from the second side of the first lens to the first side of the second lens on the optical axis. The first lens has a negative optical power, and the air gap between the first lens and the second lens is reasonably controlled to be long enough, so that the light trend can be smooth, and the angle of the light incident to the second lens is small enough, which is beneficial to improve the resolution while reducing the sensitivity of the first lens. More specifically, F1 and T12 may further satisfy: 1.6≤|F1 / T12|≤6. By controlling the conditional formula within this range, the light trend can be made smoother, and the angle of the light incident to the second lens is small enough, which is further beneficial to improve the resolution while reducing the sensitivity of the first lens.

[0067] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.5≤F2 / F≤25, wherein F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the focal length value of the second lens can be reasonably controlled so that the light rays diverged by the first lens can converge less, and the light rays can converge smoothly after passing through the second lens, thereby reducing the degree of light deflection and improving the resolution. More specifically, F2 and F can further satisfy: 3≤F2 / F≤21.5. By controlling the conditional expression within this range, the light rays can converge more smoothly after passing through the second lens, which is more conducive to reducing the degree of light deflection and further improving the resolution.

[0068] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.5≤F3 / F≤12, wherein F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the focal length value of the third lens is reasonably controlled, and the angle of deflection of the light after being transmitted through the second lens is adjusted, so that the light can be smoothly converged after passing through the third lens, the degree of light deflection can be reduced, and the resolution can be improved. More specifically, F3 and F can further satisfy: 2.5≤F3 / F≤9. By controlling the conditional expression within this range, the angle of deflection of the light after being transmitted through the second lens can be better adjusted, so that the light can be more smoothly converged after passing through the third lens, which is more conducive to reducing the degree of light deflection and further improving the resolution.

[0069] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤R5 / F3≤1.8, wherein R5 is the radius of curvature of the first side of the third lens, and F3 is the effective focal length of the third lens. By controlling this conditional expression and rationally controlling the ratio of the radius of curvature of the object side of the third lens to the focal length of the third lens, the excessive deflection of light by the third lens can be reduced, so that the light can converge smoothly after passing through the third lens. More specifically, R5 and F3 can further satisfy: 0.23≤R5 / F3≤1.4. By controlling the conditional expression within this range, it can be more conducive to reducing the excessive deflection of light by the third lens, so that the light can converge more smoothly after passing through the third lens.

[0070] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤F4 / F≤8.5, wherein F4 is the effective focal length of the fourth lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the focal length value of the fourth lens is reasonably controlled, and the angle of deflection of the light after transmission through the third lens is adjusted, so that the light can be smoothly converged after passing through the fourth lens, the degree of light deflection can be reduced, and the resolution can be improved. More specifically, F4 and F can further satisfy: 1.44≤F4 / F≤7.5. By controlling the conditional expression within this range, the light can be more smoothly converged after passing through the fourth lens, which is further conducive to reducing the degree of light deflection and further improving the resolution.

[0071] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤R8 / TTL≤4.5, wherein R8 is the radius of curvature of the second side of the fourth lens, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens. The image side surface of the fourth lens is concave. By reasonably controlling its radius of curvature, the light can be properly diverged, which is conducive to the smooth transition of the light to the rear optical system, and is conducive to improving the image quality. More specifically, R8 and TTL can further satisfy: 0.25≤R8 / TTL≤3.8. By controlling the conditional formula within this range, it can be more conducive to the smooth transition of the light to the rear optical system, which is further conducive to improving the image quality.

[0072] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.05≤R7 / (CT4+R8)≤1, wherein R7 is the radius of curvature of the first side of the fourth lens, CT4 is the center thickness of the fourth lens on the optical axis, and R8 is the radius of curvature of the second side of the fourth lens. Controlling the radius of curvature and the center thickness of the first and second sides of the fourth lens helps to smooth the direction of light, correct aberrations and improve resolution. More specifically, R7, CT4 and R8 may further satisfy: 0.07≤R7 / (CT4+R8)≤0.75. By controlling the conditional formula within this range, it can be more conducive to smoothing the direction of light, further correcting aberrations and improving resolution.

[0073] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.5≤|F5| / F≤12, wherein F5 is the effective focal length of the fifth lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression and rationally controlling the focal length value of the fifth lens, the light can be incident on the image plane smoothly after passing through the fifth lens, thereby reducing the degree of light deflection and improving the resolution. More specifically, F5 and F can further satisfy: 2≤|F5| / F≤9. By controlling the conditional expression within this range, the light can be incident on the image plane more smoothly after passing through the fifth lens, which is more conducive to reducing the degree of light deflection and further improving the resolution.

[0074] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.12≤R10 / TTL≤0.9, wherein R10 is the radius of curvature of the second side of the fifth lens, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens. The image side surface of the fifth lens is a concave surface. By reasonably controlling its radius of curvature, the light can be appropriately diverged, which is conducive to the smooth transition of the light to the rear optical system and the improvement of the resolution. More specifically, R10 and TTL can further satisfy: 0.15≤R10 / TTL≤0.5. By controlling the conditional formula within this range, the light can be appropriately diverged, which is more conducive to the smooth transition of the light to the rear optical system and the improvement of the resolution.

[0075] In an exemplary embodiment, the optical lens according to the present application may satisfy: 3≤D10×BFL / H≤26, wherein D10 is the maximum effective aperture of the second side of the fifth lens, BFL is the distance from the center of the second side of the fifth lens to the imaging plane on the optical axis, and H is the image height corresponding to the maximum field angle of the optical lens. By controlling this conditional expression, under the condition of the same imaging plane and the same image height, the back focus of the lens can be shortened, which is beneficial to reducing the size of the lens. More specifically, D10, BFL and H may further satisfy: 4.2≤D10×BFL / H≤23.5. By controlling the conditional expression within this range, under the condition of the same imaging plane and the same image height, the back focus of the lens can be better shortened, which is further beneficial to reducing the size of the lens.

[0076] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.3≤R9 / (CT5+R10)≤7.5, wherein R9 is the radius of curvature of the first side of the fifth lens, R10 is the radius of curvature of the second side of the fifth lens, and CT5 is the center thickness of the fifth lens on the optical axis. The radius of curvature and the center thickness of the first and second sides of the fifth lens are controlled to smoothly transition the light to the image plane, correct aberrations and improve the resolution. More specifically, R9, CT5 and R10 may further satisfy: 0.5≤R9 / (CT5+R10)≤6.6. By controlling the conditional formula within this range, it is more conducive to smoothly transitioning the light to the image plane, better correcting aberrations and improving the resolution.

[0077] In an exemplary embodiment, the optical lens according to the present application may satisfy: 3≤(F2+F3+F4) / 3 / F≤12, wherein F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, and F is the total effective focal length of the optical lens. The second lens, the third lens, and the fourth lens all have positive focal power, and the focal length distribution of the three lenses is reasonably controlled to meet the conditional formula 3≤(F2+F3+F4) / 3 / F≤12, so that the average focal length value of the three lenses is large, so that the light diverged by the first lens can be smoothly converged to the fifth lens under the action of the second, third, and fourth lenses, reducing the sensitivity of the lens and improving the resolution. More specifically, F2, F3, F4 and F can further satisfy: 3.6≤(F2+F3+F4) / 3 / F≤9. By controlling the conditional formula within this range, the light diverged by the first lens can be more smoothly converged onto the fifth lens under the action of the second, third and fourth lenses, which can further reduce the sensitivity of the lens and improve the resolution.

[0078] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.45≤φ25 / φ≤0.99, wherein φ25 is the combined optical power value of the second lens, the third lens, the fourth lens and the fifth lens, φ is the total optical power value of the optical lens, φ=1 / F, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the combined optical power of the second to fifth lenses can be reasonably controlled so that the light diverged by the first lens can be smoothly converged to the image plane under the action of the second to fifth lenses, thereby reducing the sensitivity of the lens and improving the resolution. More specifically, φ25 and φ can further satisfy: 0.6≤φ25 / φ≤0.96. By controlling the conditional expression within this range, the light diverged by the first lens can be more smoothly converged to the image plane under the action of the second to fifth lenses, thereby further reducing the sensitivity of the lens and further improving the resolution.

[0079] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.02≤(T23+T34+T45) / TTL≤0.55, wherein T23 is the distance from the second side of the second lens to the first side of the third lens on the optical axis, T34 is the distance from the second side of the third lens to the first side of the fourth lens on the optical axis, T45 is the distance from the second side of the fourth lens to the first side of the fifth lens on the optical axis, and TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis. The second, third, and fourth lenses all have positive focal power. By controlling this conditional expression and reasonably controlling the air spacing setting between the lenses, the light passing through the second to fourth lenses can gradually adjust the deflection angle to prevent excessive convergence of the light, so that the light diverged by the first lens can be smoothly converged to the fifth lens under the action of the second to fourth lenses. More specifically, T23, T34, T45 and TTL can further satisfy: 0.05≤(T23+T34+T45) / TTL≤0.44. By controlling the conditional expression within this range, the deflection angle of the light passing through the second to fourth lenses can be gradually adjusted to better prevent excessive convergence of the light, so that the light diverged through the first lens can be more smoothly converged onto the fifth lens under the action of the second to fourth lenses.

[0080] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.03≤R7 / R9≤2.5, wherein R7 is the radius of curvature of the first side of the fourth lens, and R9 is the radius of curvature of the first side of the fifth lens. The fourth lens has positive focal length, which can converge the light, and the object side of the fifth lens is convex, which can converge the light again. By controlling this conditional expression, the fourth and fifth lenses cooperate to smoothly deflect the light and incident on the image plane, thereby improving the resolution. More specifically, R7 and R9 may further satisfy: 0.07≤R7 / R9≤2. By controlling the conditional expression within this range, the light can be better deflected and incident on the image plane, thereby further improving the resolution.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤R8 / R10≤25, wherein R8 is the radius of curvature of the second side of the fourth lens, and R10 is the radius of curvature of the second side of the fifth lens. The fourth lens has a positive optical power, which can converge the light. The image side of the fifth lens is a concave surface, which receives the light converged from the fourth lens. By controlling this conditional expression, it is possible to prevent the light from being excessively deflected, and to make the light trend smoother, which is beneficial to improving the resolution while reducing the sensitivity of the lens. More specifically, R8 and R10 may further satisfy: 1.3≤R8 / R10≤19. By controlling the conditional expression within this range, it is possible to better prevent the light from being excessively deflected, and to make the light trend smoother, which is further beneficial to improving the resolution while further reducing the sensitivity of the lens.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0≤T23 / TTL≤0.15, wherein T23 is the distance from the second side of the second lens to the first side of the third lens on the optical axis, and TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis. By controlling this conditional expression, the distance between the image side of the second lens and the object side of the third lens can be reasonably controlled to be smaller, so that the second lens can better converge light and prevent excessive convergence of light, which is beneficial to the subsequent smooth adjustment of the light deflection angle of the third lens, and is beneficial to improving the resolution. More specifically, T23 and TTL can further satisfy: 0.001≤T23 / TTL≤0.12. By controlling the conditional expression within this range, the resolution can be further improved.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.5≤F / H≤2.2, wherein F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. By controlling this conditional expression and rationally controlling the ratio of F to H, the optical lens may have a longer focal length and a larger image surface. More specifically, F and H may further satisfy: 1.7≤F / H≤1.89. By controlling the conditional expression within this range, it may be more conducive to making the optical lens have a longer focal length and a larger image surface.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.8≤TTL / F≤5.5, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. By controlling this conditional expression, a longer focal length and miniaturization of the optical lens can be achieved. More specifically, TTL and F may further satisfy: 3.25≤TTL / F≤4.8. By controlling the conditional expression within this range, a longer focal length and miniaturization of the optical lens can be better achieved.

[0085] According to an exemplary embodiment of the present application, the optical lens includes five lenses with optical power, which are first to fifth lenses arranged in sequence from the first side to the second side along the optical axis, wherein the first lens has negative optical power, and at least one of the first side surface and the second side surface thereof is a concave surface; the second lens has positive optical power, and at least one of the first side surface and the second side surface thereof is a convex surface; the third lens has positive optical power, and the first side surface thereof is a convex surface; the fourth lens has positive optical power, and the first side surface thereof is a convex surface, and the second side surface is a concave surface; the fifth lens has optical power, and the first side surface thereof is a convex surface, and the second side surface is a concave surface; the total effective focal length F of the optical lens and the effective focal lengths F2, F3, F4 and F5 of the second to fifth lenses satisfy the conditional formula 0.4≤F / F2+F / F3+F / F4+F / F5≤1.2; the distance T12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy the conditional formula 0.09≤T12 / TTL≤0.4. By setting the lens in this way, the focal length distribution of the second to fifth lenses can be reasonably controlled, so that the light diverged by the first lens can be smoothly converged onto the image plane under the action of the second to fifth lenses, which can reduce the sensitivity of the lens and improve the resolution; by reasonably controlling the distance from the second side surface of the first lens to the first side surface of the second lens, the light can be appropriately diverged and the light can move smoothly, which is beneficial to improve the resolution while reducing the sensitivity of the first lens.

[0086] The optical lens according to the exemplary embodiment of the present application adopts a five-piece lens architecture. By reasonably setting parameters such as the lens optical power, surface shape, curvature radius, center thickness, and air spacing between lenses on the optical axis, the optical lens can have one or more beneficial effects such as high resolution, miniaturization, small FNO and short back focus, so that the optical lens can better meet the high requirements of automotive applications such as lidar lenses.

[0087] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses. The following further describes a specific embodiment of the optical lens applicable to the above-mentioned embodiment with reference to the accompanying drawings. Example 1

[0088] The following reference Figure 1 An optical lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0089] like Figure 1As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter L6, a protective glass L7 and an image plane IMA located on the second side of the fifth lens L5.

[0090] The first lens L1 is a concave-convex lens with negative focal power, whose first side surface S1 is concave and whose second side surface S2 is convex. The second lens L2 is a concave-convex lens with positive focal power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive focal power, whose first side surface S5 is convex and whose second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive focal power, whose first side surface S7 is convex and whose second side surface S8 is concave. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S9 is convex and whose second side surface S10 is concave.

[0091] In this embodiment, the fifth lens L5 is an aspherical lens. The stop STO is located between the third lens L3 and the fourth lens L4.

[0092] In this embodiment, the filter L6 has, for example, a first side surface S11 and a second side surface S12 ; the protective glass L7 has, for example, a first side surface S13 and a second side surface S14 .

[0093] When the optical lens is used for video recording, light from an object can sequentially pass through surfaces S1 to S14 and finally form an image on an imaging surface; when the optical lens is used for projection, light from the light source side can sequentially pass through surfaces S14 to S1 and finally be projected onto a target object (not shown).

[0094] Table 1 shows the radius of curvature R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 1. Wherein, regarding "thickness / distance", it should be understood that the thickness / distance of the row where S1 is located is the center thickness of the first lens L1, the thickness / distance of the row where S2 is located is the air spacing distance between the first lens L1 and the second lens L2, the thickness / distance of the row where S3 is located is the center thickness of the second lens L2, the thickness / distance of the row where S4 is located is the air spacing distance between the second lens L2 and the third lens L3, and so on.

[0095] Table 1

[0096] In this embodiment, the first side surface S9 and the second side surface S10 of the fifth lens L5 are aspherical surfaces. The surface shape of the aspherical lens can be defined by but not limited to the following aspherical surface formula: (1) Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is 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 curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical mirror surfaces S9-S10 that can be used in Example 1.

[0097] Table 2

[0098] MTF (Modulation Transfer Function) describes the ability of an optical system to "restore" the object space on the image side. The horizontal axis of the modulation transfer function (MTF) curve is the spatial frequency, and the unit of spatial frequency is line pairs per millimeter (lp / mm). The vertical axis Modulus of the OTF represents the OTF coefficient.

[0099] The spot diagram shows the focusing state of light of different wavelengths on the imaging surface, where RMS (Root Mean Square) is used to describe the diffuse spot size caused by wavefront error or aberration in the optical system. The RMS radius is an important parameter for evaluating the imaging quality of the optical system. It is obtained by calculating the average square root of the sum of the coordinates of each point of the diffuse spot relative to the center point, thereby quantitatively reflecting the actual spot size of the system.

[0100] The Encircled Energy curve is used to describe the energy distribution of a light beam in a specific area after it passes through an optical system, reflecting the concentration of the light spot energy. Specifically, it refers to the ratio of the light intensity or energy contained within a certain radius to the total intensity or total energy in the diffraction pattern of the light beam.

[0101] The optical lens of this embodiment has an MTF value of more than 0.78 at a spatial frequency of 25lp / mm (25 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 6.4μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.3%. The optical lens provided in this embodiment has a high resolution. Example 2

[0102] Figure 2 The structure diagram of the optical lens according to Embodiment 2 of the present application is shown. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0103] In this embodiment, the positive and negative properties of the optical power and the surface shape of each lens from the first lens L1 to the fifth lens L5 are the same as those in the first embodiment.

[0104] Table 3 shows the relevant parameters of each lens of the optical lens of Example 2. Table 4 shows the cone coefficients and high-order coefficients of each aspherical mirror surface S9-S10 that can be used in this embodiment, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0105] Table 3

[0106] Table 4

[0107] The optical lens of this embodiment has an MTF value of more than 0.5 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.2μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Example 3

[0108] Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0109] The difference from Embodiment 1 is that, in this embodiment, the second lens L2 is a convex-convex lens with positive refractive power, and its first side surface S3 is a convex surface, and its second side surface S4 is a convex surface.

[0110] Table 5 shows the relevant parameters of each lens of the optical lens of Example 3. Table 6 shows the cone coefficients and high-order coefficients that can be used for each aspherical mirror surface S9-S10 in this embodiment.

[0111] Table 5

[0112] Table 6

[0113] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.30 , Fig.31 and Fig.32As shown. The MTF value of the optical lens of this embodiment exceeds 0.54 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.4μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.5%. The optical lens provided in this embodiment has a high resolution. Example 4

[0114] Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0115] The difference from Embodiment 1 is that, in this embodiment, the second lens L2 is a convex-convex lens with positive refractive power, and its first side surface S3 is a convex surface, and its second side surface S4 is a convex surface.

[0116] Table 7 shows the relevant parameters of each lens of the optical lens of Example 4. Table 8 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0117] Table 7

[0118] Table 8

[0119] The optical lens of this embodiment has an MTF value of more than 0.72 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 3.7μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Example 5

[0120] Figure 5 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0121] The difference from Embodiment 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive refractive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface.

[0122] Table 9 shows the relevant parameters of each lens of the optical lens of Example 5. Table 10 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0123] Table 9

[0124] Table 10

[0125] The optical lens of this embodiment has an MTF value of more than 0.79 at a spatial frequency of 25lp / mm (25 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 6.3μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.5%. The optical lens provided in this embodiment has a high resolution. Example 6

[0126] Figure 6 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0127] The difference from Embodiment 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive refractive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface.

[0128] Table 11 shows the relevant parameters of each lens of the optical lens of Example 6. Table 12 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0129] Table 11

[0130] Table 12

[0131] The optical lens of this embodiment has an MTF value of more than 0.66 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.4μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Example 7

[0132] Figure 7 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0133] In this embodiment, the positive and negative properties of the optical power and the surface shape of each lens from the first lens L1 to the fifth lens L5 are the same as those in the first embodiment.

[0134] Table 13 shows the relevant parameters of each lens of the optical lens of Example 7. Table 14 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0135] Table 13

[0136] Table 14

[0137] The optical lens of this embodiment has an MTF value of more than 0.70 at a spatial frequency of 25lp / mm (25 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 12.5μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 92.9%. The optical lens provided in this embodiment has a high resolution. Example 8

[0138] Figure 8 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0139] In this embodiment, the positive and negative properties of the optical power and the surface shape of each lens from the first lens L1 to the fifth lens L5 are the same as those in the first embodiment.

[0140] Table 15 shows the relevant parameters of each lens of the optical lens of Example 8. Table 16 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0141] Table 15

[0142] Table 16

[0143] The optical lens of this embodiment has an MTF value of more than 0.52 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 7.5μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.2%. The optical lens provided in this embodiment has a high resolution. Example 9

[0144] Fig. 9 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown.

[0145] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The third lens L3 is a convex-convex lens with positive power, the first side surface S5 of which is a convex surface, and the second side surface S6 of which is a convex surface.

[0146] In this embodiment, the first lens L1 and the fifth lens L5 are both aspherical lenses. Table 17 shows the relevant parameters of each lens of the optical lens of Example 9. Table 18 shows the cone coefficients and high-order coefficients of each aspherical mirror surface S1-S2, S9-S10 that can be used in this embodiment.

[0147] Table 17

[0148] Table 18

[0149] The optical lens of this embodiment has an MTF value of more than 0.53 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 6.1μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.2%. The optical lens provided in this embodiment has a high resolution. Example 10

[0150] Fig.10 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown.

[0151] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The third lens L3 is a convex-convex lens with positive power, the first side surface S5 of which is a convex surface, and the second side surface S6 of which is a convex surface.

[0152] In this embodiment, the first lens L1 and the fifth lens L5 are both aspherical lenses. Table 19 shows the relevant parameters of each lens of the optical lens of Example 10. Table 20 shows the cone coefficients and high-order coefficients of each aspherical mirror surface S1-S2, S9-S10 that can be used in this embodiment.

[0153] Table 19

[0154] Table 20

[0155] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.33 , Fig.34 and Fig.35As shown. The MTF value of the optical lens of this embodiment exceeds 0.77 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 3.0μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 11

[0156] Fig.11 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown.

[0157] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative power, the first side surface S1 of which is a convex surface, and the second side surface S2 is a concave surface. The second lens L2 is a convex-convex lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 of which is a convex surface.

[0158] Table 21 shows the relevant parameters of each lens of the optical lens of Example 11. Table 22 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0159] Table 21

[0160] Table 22

[0161] The optical lens of this embodiment has an MTF value of more than 0.74 at a spatial frequency of 25lp / mm (25 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 6.7μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 94.7%. The optical lens provided in this embodiment has a high resolution. Example 12

[0162] Fig.12 A schematic structural diagram of an optical lens according to Example 12 of the present application is shown.

[0163] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative optical power, the first side surface S1 of which is a convex surface, and the second side surface S2 is a concave surface. The second lens L2 is a convex-concave lens with positive optical power, the first side surface S3 of which is a convex surface, and the second side surface S4 of which is a concave surface.

[0164] Table 23 shows the relevant parameters of each lens of the optical lens of Example 12. Table 24 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0165] Table 23

[0166] Table 24

[0167] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.36 , Fig.37 and Fig.38 As shown. The MTF value of the optical lens of this embodiment at the spatial frequency of 50lp / mm (50 lines / mm) exceeds 0.58; in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.0μm; in terms of the diffraction circle energy, within the circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.5%. The optical lens given in this embodiment has a high resolution. Example 13

[0168] Fig.13 A schematic structural diagram of an optical lens according to Example 13 of the present application is shown.

[0169] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative power, the first side surface S1 of which is convex, and the second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is convex, and the second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive power, the first side surface S5 of which is convex, and the second side surface S6 is convex.

[0170] Table 25 shows the relevant parameters of each lens of the optical lens of Example 13. Table 26 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0171] Table 25

[0172] Table 26

[0173] The optical lens of this embodiment has an MTF value of more than 0.51 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.8μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 14

[0174] Fig.14 A schematic structural diagram of an optical lens according to Example 14 of the present application is shown.

[0175] The difference from Embodiment 1 is that in this embodiment, the fifth lens L5 is a convex-concave lens with positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a concave surface.

[0176] Table 27 shows the relevant parameters of each lens of the optical lens of Example 14. Table 28 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0177] Table 27

[0178] Table 28

[0179] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.39 , Fig.40 and Fig.41 As shown. The MTF value of the optical lens of this embodiment exceeds 0.65 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.4μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.5%. The optical lens provided in this embodiment has a high resolution. Embodiment 15

[0180] Fig.15 A schematic structural diagram of an optical lens according to Example 15 of the present application is shown.

[0181] The difference from Embodiment 1 is that in this embodiment, the fifth lens L5 is a convex-concave lens with positive refractive power, and its first side surface S9 is a convex surface, and its second side surface S10 is a concave surface.

[0182] Table 29 shows the relevant parameters of each lens of the optical lens of Example 15. Table 30 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0183] Table 29

[0184] Table 30

[0185] The optical lens of this embodiment has an MTF value of more than 0.69 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.2μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Example 16

[0186] Fig.16 A schematic structural diagram of an optical lens according to Example 16 of the present application is shown.

[0187] The difference from Example 1 is that in this embodiment, the first lens L1 is a concave-concave lens with negative power, the first side surface S1 of which is concave, and the second side surface S2 is concave. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is convex, and the second side surface S10 of which is concave.

[0188] In this embodiment, the fourth lens L4 and the fifth lens L5 are both aspherical lenses. Table 31 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 32 shows the cone coefficients and high-order coefficients that can be used for each aspherical mirror surface S7-S10 in this embodiment.

[0189] Table 31

[0190] Table 32

[0191] The optical lens of this embodiment has an MTF value of more than 0.64 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 10.0μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 94.5%. The optical lens provided in this embodiment has a high resolution. Embodiment 17

[0192] Fig.17A schematic structural diagram of an optical lens according to Example 17 of the present application is shown.

[0193] The difference from Example 1 is that in this embodiment, the first lens L1 is a concave-concave lens with negative power, the first side surface S1 of which is concave, and the second side surface S2 is concave. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is convex, and the second side surface S10 of which is concave.

[0194] In this embodiment, the fourth lens L4 and the fifth lens L5 are both aspherical lenses. Table 33 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 34 shows the cone coefficients and high-order coefficients that can be used for each aspherical mirror surface S7-S10 in this embodiment.

[0195] Table 33

[0196] Table 34

[0197] The optical lens of this embodiment has an MTF value of more than 0.75 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.3μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 18

[0198] Fig.18 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown.

[0199] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-convex lens with positive power, the first side surface S3 thereof is a convex surface, and the second side surface S4 is a convex surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 thereof is a convex surface, and the second side surface S10 is a concave surface.

[0200] Table 35 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 36 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0201] Table 35

[0202] Table 36

[0203] The optical lens of this embodiment has an MTF value of more than 0.65 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 9.0μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 92.7%. The optical lens provided in this embodiment has a high resolution. Embodiment 19

[0204] Fig.19 A schematic structural diagram of an optical lens according to Example 19 of the present application is shown.

[0205] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-convex lens with positive power, the first side surface S3 thereof is a convex surface, and the second side surface S4 is a convex surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 thereof is a convex surface, and the second side surface S10 is a concave surface.

[0206] Table 37 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 38 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0207] Table 37

[0208] Table 38

[0209] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.42 , Fig.43 and Fig.44 As shown. The MTF value of the optical lens of this embodiment exceeds 0.70 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.0μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 20

[0210] Fig. 20 A schematic structural diagram of an optical lens according to Example 20 of the present application is shown.

[0211] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-convex lens with positive power, the first side surface S3 thereof is a convex surface, and the second side surface S4 is a convex surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 thereof is a convex surface, and the second side surface S10 is a concave surface.

[0212] Table 39 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 40 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0213] Table 39

[0214] Table 40

[0215] The optical lens of this embodiment has an MTF value of more than 0.52 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 6.2μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 96.5%. The optical lens provided in this embodiment has a high resolution. Embodiment 21

[0216] Fig.21 A schematic structural diagram of an optical lens according to Example 21 of the present application is shown.

[0217] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-convex lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a convex surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface.

[0218] Table 41 shows the relevant parameters of each lens of the optical lens of this embodiment. Table 42 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0219] Table 41

[0220] Table 42

[0221] The optical lens of this embodiment has an MTF value of more than 0.70 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 3.8μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 22

[0222] Fig. 22A schematic structural diagram of an optical lens according to Example 22 of the present application is shown.

[0223] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface.

[0224] Table 43 shows the relevant parameters of each lens of the optical lens of Example 22. Table 44 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0225] Table 43

[0226] Table 44

[0227] The optical lens of this embodiment has an MTF value of more than 0.58 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 14.5μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 89.2%. The optical lens provided in this embodiment has a high resolution. Embodiment 23

[0228] Fig.23 A schematic structural diagram of an optical lens according to Example 23 of the present application is shown.

[0229] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface.

[0230] Table 45 shows the relevant parameters of each lens of the optical lens of Example 23. Table 46 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0231] Table 45

[0232] Table 46

[0233] The optical point diagram, MTF diagram and diffraction circle energy diagram of the optical lens of this embodiment are respectively as follows: Fig.45 , Fig.46 and Fig.47 As shown. The MTF value of the optical lens of this embodiment exceeds 0.79 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.2μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.2%. The optical lens provided in this embodiment has a high resolution. Embodiment 24

[0234] Fig.24 A schematic structural diagram of an optical lens according to Example 24 of the present application is shown.

[0235] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface.

[0236] Table 47 shows the relevant parameters of each lens of the optical lens of Example 24. Table 48 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0237] Table 47

[0238] Table 48

[0239] The optical lens of this embodiment has an MTF value of more than 0.69 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 8.1μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 94.4%. The optical lens provided in this embodiment has a high resolution. Embodiment 25

[0240] Fig.25 A schematic structural diagram of an optical lens according to Example 25 of the present application is shown.

[0241] The difference from Example 1 is that in this embodiment, the second lens L2 is a convex-concave lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 is a concave surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface.

[0242] Table 49 shows the relevant parameters of each lens of the optical lens of Example 25. Table 50 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0243] Table 49

[0244] Table 50

[0245] The optical lens of this embodiment has an MTF value of more than 0.81 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.2μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 98.3%. The optical lens provided in this embodiment has a high resolution. Embodiment 26

[0246] Fig.26 A schematic structural diagram of an optical lens according to Example 26 of the present application is shown.

[0247] The difference from Example 1 is that in this embodiment, the first lens L1 is a concave-planar lens with negative power, the first side surface S1 of which is a concave surface, and the second side surface S2 is a plane surface. The second lens L2 is a convex-convex lens with positive power, the first side surface S3 of which is a convex surface, and the second side surface S4 of which is a convex surface. The fifth lens L5 is a convex-concave lens with positive power, the first side surface S9 of which is a convex surface, and the second side surface S10 of which is a concave surface.

[0248] Table 51 shows the relevant parameters of each lens of the optical lens of Example 26. Table 52 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0249] Table 51

[0250] Table 52

[0251] The optical lens of this embodiment has an MTF value of more than 0.69 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 8.6μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 94.5%. The optical lens provided in this embodiment has a high resolution. Embodiment 27

[0252] Fig. 27 A schematic structural diagram of an optical lens according to Example 27 of the present application is shown.

[0253] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative focal power, the first side surface S1 of which is a convex surface, and the second side surface S2 is a concave surface. The fifth lens L5 is a convex-concave lens with positive focal power, the first side surface S9 of which is a convex surface, and the second side surface S10 is a concave surface. In this embodiment, the stop STO is located between the first lens L1 and the second lens L2. The first side surface S9 of the fifth lens L5 has an inflection point.

[0254] Table 53 shows the relevant parameters of each lens of the optical lens of Example 27. Table 54 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0255] Table 53

[0256] Table 54

[0257] The optical lens of this embodiment has an MTF value of more than 0.70 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.4μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.5%. The optical lens provided in this embodiment has a high resolution. Embodiment 28

[0258] Fig.28 A schematic structural diagram of an optical lens according to Example 28 of the present application is shown.

[0259] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is convex, and whose second side surface S4 is concave. The fifth lens L5 is a convex-concave lens with positive focal power, whose first side surface S9 is convex, and whose second side surface S10 is concave. In this embodiment, the aperture STO is located between the first lens L1 and the second lens L2. The first side surface S9 of the fifth lens L5 has an inflection point.

[0260] Table 55 shows the relevant parameters of each lens of the optical lens of Example 28. Table 56 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0261] Table 55

[0262] Table 56

[0263] The optical lens of this embodiment has an MTF value of more than 0.57 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 4.3μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 97.8%. The optical lens provided in this embodiment has a high resolution. Embodiment 29

[0264] Fig.29 A schematic structural diagram of an optical lens according to Example 29 of the present application is shown.

[0265] The difference from Example 1 is that in this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive focal power, whose first side surface S3 is convex, and whose second side surface S4 is convex. The fifth lens L5 is a convex-concave lens with positive focal power, whose first side surface S9 is convex, and whose second side surface S10 is concave. In this embodiment, the aperture STO is located between the first lens L1 and the second lens L2. The first side surface S9 of the fifth lens L5 has an inflection point.

[0266] Table 57 shows the relevant parameters of each lens of the optical lens of Example 29. Table 58 shows the cone coefficients and high-order coefficients of the aspherical mirror surfaces S9-S10 that can be used in this embodiment.

[0267] Table 57

[0268] Table 58

[0269] The optical lens of this embodiment has an MTF value of more than 0.68 at a spatial frequency of 50lp / mm (50 lines / mm); in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the light spot on the image plane is 5.3μm; in terms of the diffraction circle energy, within a circle with a diameter of 15μm on the image plane, the proportion of the light spot energy in the total light energy exceeds 96.2%. The optical lens provided in this embodiment has a high resolution.

[0270] In summary, the parameter values ​​in Examples 1 to 29 are respectively shown in Tables 59 to 61 below, where the units of F, ENPD, TTL, H, D, TL, BFL, F1-F5, and D2-D10 are all millimeters (mm), the unit of FOV is degree (°), the unit of θ is radians, and the unit of φ25 is mm. -1 .

[0271] Table 59

[0272] Table 60

[0273] Table 61

[0274] Furthermore, Examples 1 to 29 satisfy the relationships shown in Tables 62 to 64 below, respectively.

[0275] Table 62

[0276] Table 63

[0277] Table 64

[0278] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0279] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. An optical lens, characterized in that: The optical lens includes, in sequence from the first side to the second side along the optical axis: A first lens having negative optical power, wherein at least one of the first side surface and the second side surface is a concave surface; a second lens having positive optical power, wherein at least one of the first side surface and the second side surface is convex; a third lens element having positive power, wherein the first side surface of the third lens element is convex; a fourth lens element having positive optical power, wherein the first side surface is convex and the second side surface is concave; and a fifth lens having optical power, wherein the first side surface is convex and the second side surface is concave; The number of lenses having optical power in the optical lens is five; The total effective focal length F of the optical lens and the effective focal length F2 of the second lens, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens satisfy: 0.4≤F / F2+F / F3+F / F4+F / F5≤1.2; A distance T12 from the second side surface of the first lens to the first side surface of the second lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.09≤T12 / TTL≤0.

4.

2. The optical lens according to claim 1, characterized in that: The first side surface and the second side surface of the first lens are respectively a concave surface and a convex surface, or respectively a concave surface and a concave surface, or respectively a convex surface and a concave surface, or respectively a concave surface and a plane surface; The first side surface and the second side surface of the second lens are respectively a concave surface and a convex surface, or respectively a convex surface and a concave surface, or respectively a convex surface and a convex surface; The second side surface of the third lens is a convex surface or a concave surface; The fifth lens has positive or negative power.

3. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 0.5≤F / ENPD≤1.2; 0.15≤TTL / H / FOV≤0.3; BFL / TTL≤0.2; D / H / FOV≤0.15; D / H / F≤0.25; -0 .1≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.05; 0.2≤(F×θ) / D≤0.5; (FOV×F) / H≥50; 1.55≤FOV / F≤2.1; Among them, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface on the optical axis, D is the maximum effective light clearance diameter of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

4. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: -8≤F1 / F≤-1; -8≤|R1| / F1≤-0.2; 1.2≤D / D10≤3.5; 2≤D / H≤10; 1.2≤|F1 / T12|≤8; Among them, F1 is the effective focal length of the first lens, R1 is the curvature radius of the first side surface of the first lens, D is the maximum effective light-clearance aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, D10 is the maximum effective light-clearance aperture of the second side surface of the fifth lens, and H is the image height corresponding to the maximum field of view angle of the optical lens.

5. The optical lens according to claim 1 or 2, characterized in that: The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: 2.5≤F2 / F≤25.

6. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 1.5≤F3 / F≤12; 0.2≤R5 / F3≤1.8; Wherein, R5 is the radius of curvature of the first side surface of the third lens.

7. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 1≤F4 / F≤8.5; 0.2≤R8 / TTL≤4.5; 0.05≤R7 / (CT4+R8)≤1; Wherein, R7 is the curvature radius of the first side surface of the fourth lens, R8 is the curvature radius of the second side surface of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis.

8. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 1.5≤|F5| / F≤12; 0.12≤R10 / TTL≤0.9; 3≤D10×BFL / H≤26; 0.3≤R9 / (CT5+R10)≤7.5; Among them, R9 is the curvature radius of the first side surface of the fifth lens, R10 is the curvature radius of the second side surface of the fifth lens, D10 is the maximum effective light clearance aperture of the second side surface of the fifth lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging plane on the optical axis, H is the image height corresponding to the maximum field of view angle of the optical lens, and CT5 is the center thickness of the fifth lens on the optical axis.

9. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets the following requirements: 3≤(F2+F3+F4) / 3 / F≤12.

10. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 0.45≤φ25 / φ≤0.99; 0.02≤(T23+T34+T45) / TTL≤0.55; Wherein, φ25 is the combined optical power value of the second lens, the third lens, the fourth lens and the fifth lens, φ is the total optical power value of the optical lens, T23 is the distance from the second side surface of the second lens to the first side surface of the third lens on the optical axis, T34 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, and T45 is the distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis.

11. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 0.03≤R7 / R9≤2.5; 1≤R8 / R10≤25; Among them, R7 is the curvature radius of the first side surface of the fourth lens, R9 is the curvature radius of the first side surface of the fifth lens, R8 is the curvature radius of the second side surface of the fourth lens, and R10 is the curvature radius of the second side surface of the fifth lens.

12. The optical lens according to claim 1 or 2, characterized in that: A distance T23 from the second side surface of the second lens to the first side surface of the third lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0≤T23 / TTL≤0.

15.

13. The optical lens according to claim 1 or 2, characterized in that: The total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1.5≤F / H≤2.

2.

14. The optical lens according to claim 1 or 2, characterized in that: A distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy the following: 2.8≤TTL / F≤5.

5.

15. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following conditions: 0.5≤F / F2+F / F3+F / F4+F / F5≤1.13; 0.12≤T12 / TTL≤0.31; 0.7≤F / ENPD≤1.1; 0.1 8≤TTL / H / FOV≤0.27; 0.04≤BFL / TTL≤0.16; 0.07≤D / H / FOV≤0.12; 0.14≤D / H / F≤0 .21; -0.05≤(H / 2-F×θ / 2) / (F×θ / 2)≤0.025; 0.27≤(F×θ) / D≤0.42; 55≤(FOV×F) / H≤60; 1.7≤FOV / F≤1.9; -4.7≤F1 / F≤-1.4; -7≤|R1| / F1≤-0.27; 1.6≤D / D10≤3.1; 2 .4≤D / H≤9.1; 1.6≤|F1 / T12|≤6; 3≤F2 / F≤21.5; 2.5≤F3 / F≤9; 0.23≤R5 / F3≤1.4; 1 .44≤F4 / F≤7.5; 0.25≤R8 / TTL≤3.8; 0.07≤R7 / (CT4+R8)≤0.75; 2≤|F5| / F≤9; 0.1 5≤R10 / TTL≤0.5; 4.2≤D10×BFL / H≤23.5; 0.5≤R9 / (CT5+R10)≤6.6; 3.6≤(F2+F3+ F4) / 3 / F≤9; 0.6≤φ25 / φ≤0.96; 0.05≤(T23+T34+T45) / TTL≤0.44; 0.07≤R7 / R9≤2; 1.3≤R8 / R10≤19; 0.001≤T23 / TTL≤0.12; 1.7≤F / H≤1.89; 3.25≤TTL / F≤4.8; Wherein, ENPD is the entrance pupil diameter of the optical lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the distance from the center of the second side surface of the fifth lens to the imaging surface on the optical axis, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F1 is the effective focal length of the first lens, R1 is the curvature radius of the first side surface of the first lens, D10 is the maximum effective aperture of the second side surface of the fifth lens, R5 is the curvature radius of the first side surface of the third lens, R7 is the curvature radius of the first side surface of the fourth lens, and R8 is the curvature radius of the first side surface of the fourth lens. The curvature radius of the second side surface of the second lens is as follows: CT4 is the center thickness of the fourth lens on the optical axis, R9 is the curvature radius of the first side surface of the fifth lens, R10 is the curvature radius of the second side surface of the fifth lens, CT5 is the center thickness of the fifth lens on the optical axis, φ25 is the combined optical focal length value of the second lens, the third lens, the fourth lens and the fifth lens, φ is the total optical focal length value of the optical lens, T23 is the distance from the second side surface of the second lens to the first side surface of the third lens on the optical axis, T34 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, and T45 is the distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis.

16. An electronic device, characterized in that: comprising the optical lens according to any one of claims 1 to 15, and It also includes an imaging element for converting the optical image or optical information formed by the optical lens into an electrical signal, wherein the imaging element is located on the second side of the optical lens, and the light from the first side forms an image on the second side after passing through the optical lens; Alternatively, it further includes a light source, which is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

Images