Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with focal power and a sixth lens with focal power from a first side to a second side along an optical axis, the optical lens satisfies the following conditions: 3.17 < = TTL / f < = 6.35 and-6.4 < = f3 / f4 < =-0.56. Wherein TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, f is the total effective focal length of the optical lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

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] Vehicle-mounted lenses are key components for autonomous driving assistance systems to obtain external information. With the rapid development of autonomous driving assistance systems, the demand for vehicle-mounted lenses is also increasing.

[0003] The existing vehicle-mounted lenses have the following main problems: (1) Most existing vehicle-mounted lenses have a large aperture number (FNO) and a small amount of light entering; (2) The existing vehicle-mounted lenses have a large number of lenses, which is not conducive to reducing costs and achieving miniaturization.

[0004] As the demand for sensing the surrounding environment of driving vehicles increases, automotive lenses are currently developing in the direction of high resolution, high light throughput, and miniaturization. Summary of the invention

[0005] One aspect of the present application provides an optical lens, which includes, in order from the first side to the second side along the optical axis: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with optical power, and a sixth lens with optical power. At least one of the first side and the second side of the first lens is a concave surface. At least one of the first side and the second side of the second lens is a convex surface. At least one of the first side and the second side of the third lens is a concave surface. The first side of the fourth lens is a convex surface. The first side of the fifth lens is a convex surface, and the second side is a concave surface. The first side of the sixth lens is a convex surface, and the second side is a concave surface. The number of lenses having optical power of the optical lens is six; and the optical lens satisfies: 3.17≤TTL / f≤6.35 and -6.4≤f3 / f4≤-0.56; wherein TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, f is the total effective focal length of the optical lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

[0006] Another aspect of the present application provides an electronic device. The electronic device includes the optical lens provided according to the present application, and also includes at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto a target area after passing through the optical lens to form an image or illuminate the area.

[0007] The present application adopts six lenses, and by optimizing the shape, optical focal length, etc. of each lens, the optical lens has at least one beneficial effect of high resolution, high light throughput and miniaturization, so that the optical lens can better meet the high requirements of vehicle-mounted applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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: Figure 1 A schematic structural diagram of an optical lens according to Embodiment 1 of the present application is shown; Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown; Figure 3 A schematic structural diagram of an optical lens according to Embodiment 3 of the present application is shown; Figure 4 A schematic structural diagram of an optical lens according to Embodiment 4 of the present application is shown; Figure 5 A schematic structural diagram of an optical lens according to Embodiment 5 of the present application is shown; Figure 6 A schematic structural diagram of an optical lens according to Embodiment 6 of the present application is shown; Figure 7 A schematic structural diagram of an optical lens according to Embodiment 7 of the present application is shown; Figure 8 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown; Fig. 9 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown; Fig.10 A schematic structural diagram of an optical lens according to Embodiment 10 of the present application is shown; Fig.11 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown; Fig.12 A schematic structural diagram of an optical lens according to Embodiment 12 of the present application is shown; Fig.13 A schematic structural diagram of an optical lens according to Embodiment 13 of the present application is shown; Fig.14 A schematic structural diagram of an optical lens according to Embodiment 14 of the present application is shown; Fig.15 A schematic structural diagram of an optical lens according to Embodiment 15 of the present application is shown; Fig.16 A schematic structural diagram of an optical lens according to Embodiment 16 of the present application is shown; Fig.17A schematic structural diagram of an optical lens according to Embodiment 17 of the present application is shown; Fig.18 Shows a modulation transfer function graph of the optical lens according to Example 3 of the present application; Fig.19 shows a point diagram of the optical lens according to Example 3 of the present application; Fig. 20 shows a diffraction circle energy diagram of the optical lens according to Example 3 of the present application; Fig.21 Shows a modulation transfer function graph of the optical lens according to Example 8 of the present application; Fig. 22 shows a point diagram of an optical lens according to Example 8 of the present application; Fig.23 shows a diffraction circle energy diagram of the optical lens according to Example 8 of the present application; Fig.24 Shows a modulation transfer function graph of the optical lens according to Example 10 of the present application; Fig.25 shows a point diagram of the optical lens according to Example 10 of the present application; Fig.26 The diffraction circle energy diagram of the optical lens according to Example 10 of the present application is shown. DETAILED DESCRIPTION

[0009] 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.

[0010] 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.

[0011] 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.

[0012] It should be understood that the optical lens provided in the present application can be used for both video and projection, and can also be used for laser radar lenses. When the optical lens provided in the present application is used for a camera lens or a laser radar receiving end lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the image side. The light from the object side can be imaged on the image side, for example, wherein the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc.; when the optical lens provided in the present application is used for a projection lens or a radar transmitting end lens, the "first side" referred to in this article may refer to the object side, and the "second side" may refer to the light source side. The second side of the optical lens may be provided with a light source, and the light source may provide light with or without image information. The light from the light source side passes through the optical lens and is projected to the first side, for example, forming an image or illuminating an area on the first side.

[0013] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position 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 concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface type in the paraxial region can be judged according to the general method in the art, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial region) is used to judge the concave and convex. Exemplarily, when the optical lens provided by the present application is used for photography, 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. In terms of the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; in terms of the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0014] It should also be understood that the terms "including" and / or "having", 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.

[0015] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0016] 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.

[0017] In an exemplary embodiment, the optical lens may include six lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the six lenses are arranged in sequence from the first side to the second side along the optical axis.

[0018] In an exemplary embodiment, the first lens has a negative optical power, and its first side surface is a concave surface, and its second side surface is a convex surface, that is, the first lens is a meniscus lens and is convex to the second side. The first side surface 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 effectively reduce the angle between the edge field of view light and the first side surface when incident, and improve the relative illumination of the edge of the lens as a whole; the second side surface of the first lens is a convex surface, which can make the light enter the rear optical system as smoothly as possible, which is conducive to reducing the sensitivity of the lens and realizing a small front aperture.

[0019] In an exemplary embodiment, the first lens has a negative optical power, and its first side surface is a convex surface, and its second side surface is a concave surface, that is, the first lens is a meniscus lens and is concave toward the second side. Under the same field of view, the light emitted through the second side surface of the first lens can make the rear optical system have a larger light receiving surface, and make the rear aperture have a larger physical aperture, so as to achieve a larger amount of light entering, which is conducive to increasing the illumination of the picture; the first side surface of the first lens is designed as a convex surface, which cooperates with the second side surface designed as a concave surface, so that the light emitted through the first lens is smoothly incident on the rear optical system, which is conducive to reducing the sensitivity of the lens.

[0020] In an exemplary embodiment, the first lens has negative optical power, and its first side surface is concave, and its second side surface is concave, which is conducive to receiving sufficient light, increasing the amount of light passing, and diffusing the light to the rear optical system.

[0021] In an exemplary embodiment, the second lens has positive focal power, and its first side surface is concave, and its second side surface is convex. The first side surface of the second lens is concave, which is conducive to proper diffusion of light, receiving light diverged from the first lens, reducing the deflection of light, and the shape of the meniscus makes the light converge to a certain extent; the second lens plays the role of receiving the front optical system and the rear optical system in the entire lens, so that the light entering the front optical system is deflected at a smaller angle, while better correcting aberrations, ensuring the low sensitivity of the lens, and improving the resolution of the lens.

[0022] In an exemplary embodiment, the second lens has positive focal power, a first side surface thereof is a convex surface, and a second side surface thereof is a concave surface. The first side surface of the second lens is a convex surface, which can collect as much light as possible to enter the rear optical system, and the second side surface of the second lens is a concave surface, which can make the light enter the rear optical system as smoothly as possible, which is conducive to reducing the sensitivity of the lens and realizing a small front aperture.

[0023] In an exemplary embodiment, the second lens has positive optical power, and its first side surface is convex, and its second side surface is convex, which is conducive to converging the front light and adjusting the light trend. The double convex structure makes it easier to adjust the light.

[0024] In an exemplary embodiment, the third lens has negative optical power, and its first side surface is concave and its second side surface is convex. The first side surface of the third lens is concave, which is conducive to proper diffusion of light, and the shape is a meniscus, so that the rear aperture has a larger physical diameter, achieving a larger amount of light entering, which is conducive to increasing the illumination of the picture; the second side surface of the third lens is convex, so that the light emitted by the third lens is smoothly incident on the rear optical system, which is conducive to reducing the sensitivity of the lens.

[0025] In an exemplary embodiment, the third lens has negative optical power, and its first side surface is convex, and its second side surface is concave, that is, the third lens is a meniscus lens and is concave toward the second side. The first side surface of the third lens is designed to be convex, and cooperates with the second side surface designed to be concave, so that the light emitted by the third lens is smoothly incident on the rear optical system, which is conducive to reducing the sensitivity of the lens.

[0026] In an exemplary embodiment, the third lens has negative optical power, and its first side surface is concave, and its second side surface is concave, which is conducive to receiving sufficient light, increasing the amount of light passing, and diffusing the light to the rear optical system.

[0027] In an exemplary embodiment, the fourth lens has positive power, and its first side surface is convex, and its second side surface is concave, that is, the fourth lens is a meniscus lens and convex to the first side. Such an arrangement is conducive to smoothly transitioning the light entering from the first side to the rear optical system, so that the rear optical system can converge the light.

[0028] In an exemplary embodiment, the fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex, which is conducive to converging the front light and adjusting the light trend. The double convex structure makes it easier to adjust the light.

[0029] In an exemplary embodiment, the fifth lens has positive optical power, a first side surface of which is convex and a second side surface of which is concave, and it can appropriately converge the front light and adjust the light trend. The first side surface of the fifth lens is convex, and it can collect as much light as possible to enter the rear optical system; the second side surface of the fifth lens is concave, and it can make the light enter the rear optical system as smoothly as possible, which is beneficial to reducing the sensitivity of the lens and realizing a small front aperture.

[0030] In an exemplary embodiment, the fifth lens has negative optical power, and its first side surface is convex and its second side surface is concave. It can appropriately diffuse the light in front and adjust the light trend to make the light transition smoothly. The shape is a crescent (the shape is close to concentric circles), so that the light converging with a large aperture at the front end can transition smoothly. The first side surface of the fifth lens is convex, which is conducive to collecting more light from the edge field of view, reducing the back focus to a certain extent, and thus reducing the overall length of the lens.

[0031] In an exemplary embodiment, the sixth lens has positive optical power, a first side surface of which is convex and a second side surface of which is concave, and is capable of converging the front light and adjusting the direction of the light. The first side surface of the sixth lens is convex, and is capable of collecting as much light as possible into the rear optical system. The second side surface of the sixth lens is concave, and is capable of allowing the light to enter the rear optical system as smoothly as possible, which is beneficial to reducing the sensitivity of the lens.

[0032] In an exemplary embodiment, the sixth lens has negative optical power, and its first side surface is convex and its second side surface is concave, which can diffuse the light in front and adjust the light trend to make the light transition smoothly. The first side surface of the sixth lens is convex and the second side surface is concave, which is conducive to proper diffusion of light and has a meniscus shape, so that the light collected by the large aperture at the front end is properly diverged, which is conducive to correcting aberrations and improving the resolution of the lens.

[0033] In an exemplary embodiment, the optical lens satisfies: 0.56≤f / ENPD≤1.43, 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 the above conditions, it is beneficial to achieve a small FNO and increase the light throughput. More specifically, f and ENPD can further satisfy 0.67≤f / ENPD≤1.16, which can be more beneficial to achieve a small FNO of the lens and further increase the light throughput.

[0034] In an exemplary embodiment, the optical lens satisfies: 3.17≤TTL / f≤6.35, wherein f is the total effective focal length of the optical lens, and TTL is the total optical length of the optical lens, i.e., the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. By controlling the above conditions, a longer focal length and miniaturization of the optical lens can be achieved. More specifically, f and TTL can further satisfy 3.76≤TTL / f≤5.13, which can be more conducive to achieving a longer focal length and miniaturization of the optical lens.

[0035] In an exemplary embodiment, the optical lens satisfies: 0.18≤TTL / H / FOV×1°≤0.37, wherein TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, H is the image height corresponding to the maximum field angle of the optical lens, and FOV is the maximum field angle of the optical lens. By controlling the above conditions, the miniaturization and large image surface of the optical lens can be achieved. More specifically, TTL, H and FOV can further satisfy 0.22≤TTL / H / FOV×1°≤0.3, which can be more conducive to the miniaturization and large image surface of the optical lens.

[0036] In an exemplary embodiment, the optical lens satisfies: 0.04≤BFL / TTL≤0.17, wherein BFL is the distance from the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. By controlling the above conditions, the back focus of the lens can be shortened, which is conducive to miniaturization of the lens while ensuring space for installation and focusing of optical elements. More specifically, BFL and TTL can further satisfy 0.05≤BFL / TTL≤0.13, which can be more conducive to miniaturization of the lens.

[0037] In an exemplary embodiment, the optical lens satisfies: 0.06≤D / H / FOV×1°≤0.16, where D is the maximum 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 FOV is the maximum field of view of the optical lens. By controlling the above conditions, it is beneficial to reduce the front port diameter of the lens, and thus to achieve miniaturization of the lens. More specifically, D, H and FOV can further satisfy 0.08≤D / H / FOV×1°≤0.13, which can be more conducive to achieving miniaturization of the lens.

[0038] In an exemplary embodiment, the optical lens meets: 0.12mm -1 ≤D / H / f≤0.3mm -1, where D is the maximum 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 the above conditions, under the condition that the total effective focal length of the optical lens is constant, the characteristics of the lens with large image height and small aperture can be achieved. More specifically, D, H and f can further satisfy 0.14mm -1 ≤D / H / f≤0.24mm -1 , which can be more conducive to realizing the characteristics of large image height and small aperture of the lens.

[0039] In an exemplary embodiment, the optical lens satisfies: 0.2≤(f×θ) / D≤0.53, where f is the total effective focal length of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and θ is the arc value of the maximum field of view of the optical lens. By controlling the above conditions, the aperture of the front end of the lens can be reduced, thereby reducing the volume of the imaging system of the lens and achieving miniaturization. More specifically, f, θ and D can further satisfy 0.24≤(f×θ) / D≤0.43, which can be more conducive to miniaturization of the lens.

[0040] In an exemplary embodiment, the optical lens satisfies: 46.3°≤(FOV×f) / H≤78.35°, where f is the total effective focal length of the optical lens, 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 the above conditions, the lens has a longer focal length, which is beneficial for the lens to achieve long-distance detection. More specifically, FOV, f and H can further satisfy 54.98°≤(FOV×f) / H≤63.28°, which can be more beneficial for the lens to have a longer focal length, and further beneficial for achieving long-distance detection.

[0041] In an exemplary embodiment, the optical lens satisfies: 1.49≤|f1 / f|≤12.63, 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 the above conditions, the light can be smoothly diverged after passing through the first lens, thereby improving the resolution of the lens. More specifically, f1 and f can further satisfy 1.78≤|f1 / f|≤10.2, which can be more conducive to the smooth divergence of the light after passing through the first lens, thereby improving the resolution of the lens.

[0042] In an exemplary embodiment, the optical lens satisfies: 1.66≤f2 / f≤13.15, where f2 is the effective focal length of the second lens, and f is the total effective focal length of the optical lens. By controlling the above conditions, the light rays diverged by the first lens can be converged to a lesser extent, and the light rays can be converged smoothly after passing through the second lens, thereby reducing the degree of light deflection and improving the resolution of the lens. More specifically, f2 and f can further satisfy 1.97≤f2 / f≤10.62, which can be more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0043] In an exemplary embodiment, the optical lens satisfies: -14.83≤f3 / f≤-2.03, 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 the above conditions, the deflection angle of the light after being transmitted through the second lens can be adjusted, and the light can be smoothly converged after passing through the third lens, thereby reducing the degree of light deflection and improving the resolution of the lens. More specifically, f3 and f can further satisfy -11.63≤f3 / f≤-2.47, which can be more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0044] In an exemplary embodiment, the optical lens satisfies: 1.52≤f4 / f≤4.76, where f4 is the effective focal length of the fourth lens and f is the total effective focal length of the optical lens. By controlling the above conditions, the deflection angle of the light after being transmitted through the third lens can be adjusted, and the light can be smoothly converged after passing through the fourth lens, thereby reducing the degree of light deflection and improving the resolution of the lens. More specifically, f4 and f can further satisfy 1.81≤f4 / f≤3.84, which can be more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0045] In an exemplary embodiment, the optical lens satisfies: 1.88≤|f5 / f|≤14.89, where f5 is the effective focal length of the fifth lens and f is the total effective focal length of the optical lens. By controlling the above conditions, the deflection angle of the light after being transmitted through the fourth lens can be adjusted, and the light can be smoothly converged after passing through the fifth lens, thereby reducing the degree of light deflection and improving the resolution of the lens. More specifically, f5 and f can further satisfy 2.23≤|f5 / f|≤12.03, which can be more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0046] In an exemplary embodiment, the optical lens satisfies: 2.12≤|f6 / f|≤14.82, wherein f6 is the effective focal length of the sixth lens, and f is the total effective focal length of the optical lens. By controlling the above conditions, the light can be incident on the imaging surface smoothly after passing through the sixth lens, the degree of light deflection can be reduced, and the resolution of the lens can be improved. More specifically, f6 and f can further satisfy 2.52≤|f6 / f|≤11.97, which can be more conducive to making the light pass through the sixth lens and smoothly incident on the imaging surface, further conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0047] In an exemplary embodiment, the optical lens satisfies: -1.95≤f2 / f3≤-0.21, wherein f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens. The second lens has a positive focal power, and the third lens has a negative focal power. By rationally allocating the focal lengths of the second lens and the third lens, it is beneficial for the light passing through the third lens to smoothly enter the rear optical system, thereby reducing the sensitivity of the lens and improving the resolution. More specifically, f2 and f3 may further satisfy -1.53≤f2 / f3≤-0.26, which may be more beneficial for the light passing through the third lens to smoothly enter the rear optical system, further reducing the sensitivity of the lens and improving the resolution.

[0048] In an exemplary embodiment, the optical lens satisfies: -6.4≤f3 / f4≤-0.56, where f3 is the effective focal length of the third lens and f4 is the effective focal length of the fourth lens. The third lens has a negative focal power and the fourth lens has a positive focal power. By reasonably allocating the focal lengths of the third lens and the fourth lens, it is beneficial to smoothly transition the light and improve the image quality. More specifically, f3 and f4 can further satisfy -5.02≤f3 / f4≤-0.67, which can be more beneficial to smoothly transition the light and improve the image quality.

[0049] In an exemplary embodiment, the optical lens satisfies: 0.13≤R9 / TTL≤1.15, wherein R9 is the radius of curvature of the first side surface of the fifth lens, and TTL is the distance on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the first side surface of the fifth lens is positive, and the first side surface is a convex surface, which can make the light converge appropriately, which is conducive to the deflection of the light to the rear optical system, which is conducive to reducing the rear port diameter and improving the image quality. More specifically, R9 and TTL can further satisfy 0.16≤R9 / TTL≤0.84, which can be more conducive to the deflection of the light to the rear optical system, which is further conducive to reducing the rear port diameter and improving the image quality.

[0050] In an exemplary embodiment, the optical lens satisfies: 0.18≤R10 / TTL≤2, wherein R10 is the radius of curvature of the second side surface of the fifth lens, and TTL is the distance on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the second side surface of the fifth lens is positive, and the second side surface is concave, which can make the light diverge appropriately, facilitate the smooth transition of the light to the rear optical system, and improve the resolution of the lens. More specifically, R10 and TTL can further satisfy 0.21≤R10 / TTL≤1.52, which can be more conducive to the smooth transition of the light to the rear optical system and improve the resolution of the lens.

[0051] In an exemplary embodiment, the optical lens satisfies: 0.1≤R12 / TTL≤0.25, wherein R12 is the radius of curvature of the second side surface of the sixth lens, and TTL is the distance on the optical axis from the first side surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the second side surface of the sixth lens is positive, and the second side surface is a concave surface, which can make the light diverge appropriately, facilitate the smooth transition of the light to the rear imaging surface, and improve the resolution of the lens. More specifically, R12 and TTL can further satisfy 0.12≤R12 / TTL≤0.2, which can be more conducive to the smooth transition of the light to the rear imaging surface and improve the resolution of the lens.

[0052] In an exemplary embodiment, the optical lens satisfies: 0.62≤R9 / R11≤8.15, wherein R9 is the radius of curvature of the first side surface of the fifth lens, and R11 is the radius of curvature of the first side surface of the sixth lens. The first side surface of the fifth lens is a convex surface, which converges the light, and the first side surface of the sixth lens is a convex surface, which converges the light again. Through the cooperation of the fifth lens and the sixth lens, the light is smoothly deflected and incident on the imaging surface, thereby improving the resolution of the lens. More specifically, R9 and R11 can further satisfy 0.74≤R9 / R11≤6.58, which can be more conducive to smoothly deflecting the light and incident on the imaging surface, thereby improving the resolution of the lens.

[0053] In an exemplary embodiment, the optical lens satisfies: 0.71≤R11 / R12≤2.13, wherein R11 is the radius of curvature of the first side surface of the sixth lens, R12 is the radius of curvature of the second side surface of the sixth lens. The first side surface of the sixth lens is a convex surface, which converges the light, and the second side surface of the sixth lens is a concave surface, which receives the light converged by the first side surface, so that the light is smoothly deflected and incident on the imaging surface, which is beneficial to improve the resolution of the lens and reduce the sensitivity of the lens. More specifically, R11 and R12 can further satisfy 0.85≤R11 / R12≤1.72, which can be more beneficial to smoothly deflect the light and incident on the imaging surface, improve the resolution of the lens, and further help reduce the sensitivity of the lens.

[0054] In an exemplary embodiment, the optical lens satisfies: 0.32≤R7 / f4≤1.26, wherein R7 is the radius of curvature of the first side of the fourth lens, and f4 is the effective focal length of the fourth lens. By controlling the above conditions, the excessive deflection of the light by the fourth lens can be reduced, so that the light can converge smoothly after passing through the fourth lens. More specifically, R7 and f4 can further satisfy 0.39≤R7 / f4≤1.02, which can be more conducive to reducing the excessive deflection of the light by the fourth lens, so that the light can converge smoothly after passing through the fourth lens.

[0055] In an exemplary embodiment, the optical lens satisfies: 0.33≤R9 / (CT5+R10)≤1.37, wherein 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, and CT5 is the center thickness of the fifth lens on the optical axis. By controlling the curvature of the first side surface and the second side surface of the fifth lens, an optical path difference can be made between the peripheral light and the central light, and the central light can be diverged to enter the rear optical system, thereby improving the resolution of the lens. More specifically, R9, R10 and CT5 can further satisfy 0.4≤R9 / (CT5+R10)≤1.1, which can be more conducive to improving the resolution of the lens.

[0056] In an exemplary embodiment, the optical lens satisfies: -0.06≤(H / 2-f×θ / 2) / (f×θ / 2)≤-0.008, wherein f is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and θ is the radian value of the maximum field angle of the optical lens. By controlling the above conditions, it is possible to reduce the difference between the ideal image height and the actual image height of the lens under the same field angle, thereby reducing lens distortion. More specifically, H, f, and θ may further satisfy -0.05≤(H / 2-f×θ / 2) / (f×θ / 2)≤-0.0097, which may be more conducive to reducing the difference between the ideal image height and the actual image height of the lens under the same field angle, and further conducive to reducing lens distortion.

[0057] In an exemplary embodiment, the optical lens satisfies: 0≤T12 / TTL≤0.38, wherein T12 is the distance between the second side of the first lens and the first side of the second lens on the optical axis, and TTL is the distance between the first side of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side of the first lens and the first side of the second lens on the optical axis, the light can be properly diverged, so that the light trend is smooth, which is beneficial to improving the resolution of the lens and reducing the sensitivity of the first lens. More specifically, T12 and TTL can further satisfy 0≤T12 / TTL≤0.31, which can be more beneficial to improving the resolution of the lens and further beneficial to reducing the sensitivity of the first lens.

[0058] In an exemplary embodiment, the optical lens satisfies: 0≤T23 / TTL≤0.18, wherein T23 is the distance between the second side of the second lens and the first side of the third lens on the optical axis, and TTL is the distance between the first side of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side of the second lens and the first side of the third lens on the optical axis, 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 by the third lens and is beneficial to improving the resolution of the lens. More specifically, T23 and TTL can further satisfy 0≤T23 / TTL≤0.15, which can be more beneficial for the second lens to converge light and prevent excessive convergence of light, and is more beneficial for the subsequent smooth adjustment of the light deflection angle by the third lens and improves the resolution of the lens.

[0059] In an exemplary embodiment, the optical lens satisfies: 0.02≤T34 / TTL≤0.32, wherein T34 is the distance between the second side of the third lens and the first side of the fourth lens on the optical axis, and TTL is the distance between the first side of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side of the third lens and the first side of the fourth lens on the optical axis, the third lens can better converge light and prevent excessive convergence of light, which is beneficial to the subsequent smooth adjustment of the light deflection angle by the fourth lens and is beneficial to improving the resolution of the lens. More specifically, T34 and TTL can further satisfy 0.02≤T34 / TTL≤0.26, which can be more beneficial to the third lens converging light and preventing excessive convergence of light, and is more beneficial to the subsequent smooth adjustment of the light deflection angle by the fourth lens and improving the resolution of the lens.

[0060] In an exemplary embodiment, the optical lens satisfies: 0≤T45 / TTL≤0.07, wherein T45 is the distance between the second side of the fourth lens and the first side of the fifth lens on the optical axis, and TTL is the distance between the first side of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side of the fourth lens and the first side of the fifth lens on the optical axis, the fourth lens can better converge light and prevent excessive convergence of light, which is beneficial to the subsequent smooth adjustment of the light deflection angle by the fifth lens and the improvement of the resolution of the lens. More specifically, T45 and TTL can further satisfy 0≤T45 / TTL≤0.06, which can be more beneficial to the fourth lens converging light and preventing excessive convergence of light, and is more beneficial to the subsequent smooth adjustment of the light deflection angle by the fifth lens and the improvement of the resolution of the lens.

[0061] In an exemplary embodiment, the optical lens satisfies: 0.15≤(T12+T34) / TTL≤0.45, wherein T12 is the distance between the second side of the first lens and the first side of the second lens on the optical axis, T34 is the distance between the second side of the third lens and the first side of the fourth lens on the optical axis, and TTL is the distance between the first side of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the sum of the distance between the second side of the first lens and the first side of the second lens on the optical axis and the distance between the second side of the third lens and the first side of the fourth lens on the optical axis, the first lens and the second lens can better converge light and prevent excessive convergence of light, which is conducive to the subsequent smooth adjustment of the fourth lens to the light deflection angle, and is conducive to improving the resolution of the lens. More specifically, T12, T34 and TTL can further satisfy 0.18≤(T12+T34) / TTL≤0.36, which can be more conducive to the first lens and the second lens converging light and preventing excessive convergence of light, and is more conducive to the subsequent fourth lens to smoothly adjust the light deflection angle, thereby improving the resolution of the lens.

[0062] In an exemplary embodiment, the optical lens satisfies: 0.4≤R11 / (CT6+R12)≤1.2, wherein CT6 is the center thickness of the sixth lens on the optical axis, R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens. By controlling the curvature of the first side surface and the second side surface of the sixth lens, the light can be smoothly transitioned to the imaging surface, thereby improving the resolution of the lens. More specifically, R11, R12 and CT6 can further satisfy 0.55≤R11 / (CT6+R12)≤1, which can be more conducive to improving the resolution of the lens.

[0063] In an exemplary embodiment, the optical lens satisfies: 0.15≤CT1 / f≤0.55, wherein CT1 is the center thickness of the first lens on the optical axis, and f is the total effective focal length of the optical lens. By controlling the ratio of the center thickness of the first lens on the optical axis to the total effective focal length of the optical lens, the design freedom of the first side surface and the second side surface of the first lens can be increased, and the first lens can be prevented from excessively deflecting light, thereby improving the resolution of the lens. More specifically, CT1 and f can further satisfy 0.2≤CT1 / f≤0.47, which can be more conducive to improving the resolution of the lens.

[0064] In an exemplary embodiment, the optical lens satisfies: 0.2≤CT2 / f≤0.65, wherein CT2 is the center thickness of the second lens on the optical axis, and f is the total effective focal length of the optical lens. By controlling the ratio of the center thickness of the second lens on the optical axis to the total effective focal length of the optical lens, the design freedom of the first side surface and the second side surface of the second lens can be increased, and the second lens can be prevented from excessively deflecting light, thereby improving the resolution of the lens. More specifically, CT2 and f can further satisfy 0.28≤CT2 / f≤0.57, which can be more conducive to improving the resolution of the lens.

[0065] In an exemplary embodiment, the optical lens satisfies: 0.12≤CT3 / f≤0.55, wherein CT3 is the center thickness of the third lens on the optical axis, and f is the total effective focal length of the optical lens. By controlling the ratio of the center thickness of the third lens on the optical axis to the total effective focal length of the optical lens, the design freedom of the first side surface and the second side surface of the third lens can be increased, and the third lens is prevented from excessively deflecting light, thereby improving the resolution of the lens. More specifically, CT3 and f can further satisfy 0.16≤CT3 / f≤0.46, which can be more conducive to improving the resolution of the lens.

[0066] In an exemplary embodiment, the optical lens satisfies: 0.2≤CT4 / f≤0.55, wherein CT4 is the center thickness of the fourth lens on the optical axis, and f is the total effective focal length of the optical lens. By controlling the ratio of the center thickness of the fourth lens on the optical axis to the total effective focal length of the optical lens, the design freedom of the first side surface and the second side surface of the fourth lens can be increased, and the fourth lens is prevented from deflecting light too much, thereby improving the resolution of the lens. More specifically, CT4 and f can further satisfy 0.3≤CT4 / f≤0.46, which can be more conducive to improving the resolution of the lens.

[0067] In an exemplary embodiment, the optical lens satisfies: 0.06≤R9 / |f5|≤0.55, where R9 is the radius of curvature of the first side of the fifth lens, and f5 is the effective focal length of the fifth lens. By controlling the ratio of the radius of curvature of the first side of the fifth lens to the effective focal length of the fifth lens, the light is not excessively deflected, which is beneficial to improving image quality. More specifically, R9 and |f5| can further satisfy 0.1≤R9 / |f5|≤0.4, which can be more beneficial to improving image quality.

[0068] In an exemplary embodiment, the optical lens satisfies: 0.05≤R11 / |f6|≤0.32, where R11 is the radius of curvature of the first side surface of the sixth lens, and f6 is the effective focal length of the sixth lens. By controlling the ratio of the radius of curvature of the first side surface of the sixth lens to the effective focal length of the sixth lens, the light is not excessively deflected, which is beneficial to improving the image quality. More specifically, R11 and |f6| can further satisfy 0.07≤R11 / |f6|≤0.25, which can be more beneficial to improving the image quality.

[0069] In an exemplary embodiment, the optical lens satisfies: 1.6≤f / H≤2.2, where H is the image height corresponding to the maximum field angle of the optical lens, and f is the total effective focal length of the optical lens. By controlling the image height corresponding to the maximum field angle of the optical lens and the total effective focal length of the optical lens within a certain range, it is beneficial to improve the resolution of the lens. More specifically, f and H can further satisfy 1.8≤f / H≤1.95, which can be more beneficial to improve the resolution of the lens.

[0070] In an exemplary embodiment, the optical lens satisfies: 1.6° / mm≤FOV / f≤2.1° / mm, 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 the maximum field of view of the optical lens and the total effective focal length of the optical lens within a certain range, it is beneficial to achieve long-distance detection. More specifically, FOV and f can further satisfy 1.75° / mm≤FOV / f≤1.85° / mm, which can be more conducive to achieving long-distance detection.

[0071] In an exemplary embodiment, the optical lens may include an aperture for limiting the light beam to further improve the imaging quality of the optical lens. Exemplarily, the aperture may be disposed between the fourth lens and the fifth lens. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in an alternative embodiment, the aperture may also be disposed at other positions according to actual needs.

[0072] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the sixth lens and the imaging surface, the filter may filter light with different wavelengths, and the protective glass may prevent the elements (e.g., chip) on the second side of the optical lens from being damaged.

[0073] In an exemplary embodiment, the first lens to the sixth lens may be a spherical lens or an aspherical lens. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on the imaging quality, the number of aspherical lenses can be increased, and even all lenses can use aspherical lenses. Characteristics of aspherical lenses: The curvature changes continuously from the center of the lens to the periphery. Unlike spherical lenses with constant curvature from the center of the lens to the periphery, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberration and improving astigmatism aberration. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The setting of aspherical lenses helps to correct system aberrations and improve resolution. Specifically, for example, when focusing on resolution quality, the lenses can all use aspherical lenses. Exemplarily, the sixth lens is an aspherical lens, which can adjust the light trend to converge to the imaging surface, can better correct aberrations, and improve the resolution of the lens.

[0074] In an exemplary embodiment, the first lens to the sixth lens may be a glass lens and / or a plastic lens. The present application does not specifically limit the specific number of glass lenses and plastic 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 optical lens. 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. For example, when focusing on temperature performance, the lenses can all use glass lenses.

[0075] According to the above-mentioned embodiment of the present application, the optical lens can have at least one beneficial effect such as high resolution, miniaturization, small front aperture, high light flux, large image surface, small distortion, long focal length, and high imaging quality through the reasonable setting of parameters such as lens shape and optical focal length.

[0076] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0077] It should be noted that the optical lenses provided in Examples 1 to 17 of the present application can all achieve good imaging quality, and their point diagrams, diffraction circle energy diagrams, and modulation transfer function (MTF) curves are relatively close. Figures 18 to 26Only the spot diagrams, diffraction circle inclusion energy diagrams and modulation transfer function (MTF) curves of Example 3, Example 8 and Example 10 are exemplarily shown, while the spot diagrams, diffraction circle inclusion energy diagrams and modulation transfer function (MTF) curves of other embodiments are not shown one by one, and those skilled in the art should be able to know them based on the contents disclosed in this application.

[0078] MTF stands for modulation transfer function, which describes the ability of an optical system to "restore" the object side in the image side. The horizontal axis of the modulation transfer function curve is the spatial frequency, the unit of the spatial frequency is line pairs per millimeter (lp / mm), and the vertical axis is the MTF value. The MTF curve of the optical lens provided in this application has an MTF value of more than 0.5 at 50lp / mm, which can meet the required image quality requirements.

[0079] 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 size of the diffuse spot caused by the wavefront error or aberration in the optical system. The RMS radius is an important parameter for evaluating the imaging quality of an optical system. It is obtained by calculating the average value of the sum of the squares of the coordinates of each point of the diffuse spot relative to the center point and then taking the square root, thereby quantitatively reflecting the actual spot size of the system. The root mean square radius of the light spot of the edge field of view in the spot diagram of the optical lens provided in this application on the imaging surface is less than 15μm.

[0080] The diffraction encircled energy diagram is used to describe the energy distribution of a light beam in a specific area after passing 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 in a certain radius to the total intensity or total energy in the diffraction pattern of the light beam. In the diffraction encircled energy diagram of the optical lens provided in the present application, within a circle with a diameter of 15μm on the imaging surface, the light spot energy accounts for more than 95% of the total light energy.

[0081] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0082] Example 1

[0083] Figure 1 FIG. 1 is a schematic diagram showing the structure of an optical lens according to Embodiment 1 of the present application. Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0084] The first lens L1 has negative power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive power, and its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 has negative power, and its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive power, and its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 has positive power, and its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has negative power, and its first side surface S11 is convex, and its second side surface S12 is concave.

[0085] The optical lens may further include a stop STO, and the stop STO may be disposed between the fourth lens L4 and the fifth lens L5.

[0086] The optical lens may further include a filter L7 having a first side surface S13 and a second side surface S14 , and a protective glass L8 having a first side surface S15 and a second side surface S16 .

[0087] Table 1 shows the basic parameters of each lens of the optical lens of Example 1.

[0088] Table 1

[0089] In this embodiment, the first side surface S11 and the second side surface S12 of the sixth lens L6 are both aspherical surfaces, and the surface shape of each 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 aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspheric surfaces S11 and S12 in Example 1.

[0090] Table 2

[0091] The FNO of the optical lens of Example 1 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.72; 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 13.4μm; 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 96.95%. It can be seen that the optical lens provided in Example 1 has a high resolution.

[0092] Example 2

[0093] In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0094] Figure 2 The schematic diagram of the structure of the optical lens of Example 2 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a negative focal power. The surface shape of each lens can be known according to the data in Table 3, and no further description is given.

[0095] Table 3 shows the basic parameters of each lens of the optical lens of Example 2.

[0096] Table 3

[0097] Table 4 shows the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 2, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0098] Table 4

[0099] The FNO of the optical lens of Example 2 is 0.7; the MTF value at the spatial frequency of 50lp / mm exceeds 0.6; 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 14.82μm; 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 97.82%. It can be seen that the optical lens provided by Example 2 has a high resolution.

[0100] Example 3

[0101] Figure 3 The schematic diagram of the structure of the optical lens of Example 3 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a negative focal power. The surface shape of each lens can be known according to the data in Table 5, and will not be repeated here.

[0102] Table 5 shows the basic parameter table of each lens of the optical lens of Example 3.

[0103] Table 5

[0104] Table 6 shows the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 3, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0105] Table 6

[0106] The FNO of the optical lens of Example 3 is 0.9; Fig.18 As shown, the MTF value of the optical lens of Example 3 at a spatial frequency of 50lp / mm exceeds 0.71; Fig.19 As shown, in the aspect of the RMS of the spot diagram of the optical lens of Example 3, in the edge field of view, the root mean square radius of the spot on the image plane is 5.649 μm; Fig. 20 As shown, in terms of diffraction energy of the optical lens of Example 3, within a circle with a diameter of 15 μm on the image plane, the spot energy accounts for more than 98% of the total light energy. It can be seen that the optical lens provided by Example 3 has a high resolution.

[0107] Example 4

[0108] Figure 4 The schematic diagram of the structure of the optical lens of Example 4 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a negative focal power. The surface shape of each lens can be known according to the data in Table 7, and no further description is given.

[0109] Table 7 shows the basic parameter table of each lens of the optical lens of Example 4.

[0110] Table 7

[0111] Table 8 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 4, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0112] Table 8

[0113] The FNO of the optical lens of Example 4 is 1.1; the MTF value at the spatial frequency of 50lp / mm exceeds 0.74; 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 5.29μm; 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 97.57%. It can be seen that the optical lens provided by Example 4 has a high resolution.

[0114] Example 5

[0115] Figure 5 The schematic diagram of the structure of the optical lens of Example 5 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a negative focal power. The surface shape of each lens can be known according to the data in Table 9, and no further description is given.

[0116] Table 9 shows the basic parameter table of each lens of the optical lens of Example 5.

[0117] Table 9

[0118] Table 10 shows the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 5, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0119] Table 10

[0120] The FNO of the optical lens of Example 5 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.7; 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 8.4μm; 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 97.23%. It can be seen that the optical lens provided by Example 5 has a high resolution.

[0121] Example 6

[0122] Figure 6 The schematic diagram of the structure of the optical lens of Example 6 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a negative focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 11, and will not be repeated here.

[0123] Table 11 shows the basic parameter table of each lens of the optical lens of Example 6.

[0124] Table 11

[0125] Table 12 shows the cone coefficient k and high-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 6, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0126] Table 12

[0127] The FNO of the optical lens of Example 6 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.69; 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 11.05μm; 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 96.23%. It can be seen that the optical lens provided by Example 6 has a high resolution.

[0128] Example 7

[0129] Figure 7 The schematic diagram of the structure of the optical lens of Example 7 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a negative focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 13, and will not be repeated here.

[0130] Table 13 shows the basic parameter table of each lens of the optical lens of Example 7.

[0131] Table 13

[0132] Table 14 shows the cone coefficient k and high-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 7, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0133] Table 14

[0134] The FNO of the optical lens of Example 7 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.62; 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 9.54μm; 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 97.13%. It can be seen that the optical lens provided by Example 7 has a high resolution.

[0135] Example 8

[0136] Figure 8 The schematic diagram of the structure of the optical lens of Example 8 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a negative focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 15, and will not be repeated here.

[0137] Table 15 shows the basic parameter table of each lens of the optical lens of Example 8.

[0138] Table 15

[0139] Table 16 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 8, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0140] Table 16

[0141] The FNO of the optical lens of Example 8 is 0.9; Fig.21 As shown, the MTF value of the optical lens of Example 8 at a spatial frequency of 50lp / mm exceeds 0.72; Fig. 22 As shown, in the optical lens of Example 8, 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 6.575 μm; Fig.23 As shown, in terms of diffraction energy of the optical lens of Example 8, within a circle with a diameter of 15 μm on the image plane, the spot energy accounts for more than 97.75% of the total light energy. It can be seen that the optical lens provided by Example 8 has a high resolution.

[0142] Example 9

[0143] Fig. 9The schematic diagram of the structure of the optical lens of Example 9 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a negative focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 17, and no further description is given.

[0144] Table 17 shows the basic parameter table of each lens of the optical lens of Example 9.

[0145] Table 17

[0146] Table 18 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 9, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0147] Table 18

[0148] The FNO of the optical lens of Example 9 is 1.1; the MTF value at the spatial frequency of 50lp / mm exceeds 0.53; 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 8.23μm; 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 95.13%. It can be seen that the optical lens provided by Example 9 has a high resolution.

[0149] Example 10

[0150] Fig.10 The schematic diagram of the structure of the optical lens of Example 10 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 19, and will not be repeated here.

[0151] Table 19 shows the basic parameter table of each lens of the optical lens of Example 10.

[0152] Table 19

[0153] Table 20 shows the cone coefficient k and high-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 10, wherein each aspheric surface shape can be defined by formula (1) given in the above Example 1 but is not limited thereto.

[0154] Table 20

[0155] The FNO of the optical lens of Example 10 is 0.9; Fig.24 As shown, the MTF value of the optical lens of Example 10 at a spatial frequency of 50lp / mm exceeds 0.74; Fig.25 As shown, in the optical lens of Example 10, in terms of the RMS of the spot diagram, in the edge field of view, the root mean square radius of the spot on the image plane is 7.283 μm; Fig.26 As shown, in terms of diffraction energy of the optical lens of Example 10, within a circle with a diameter of 15 μm on the image plane, the spot energy accounts for more than 97.58% of the total light energy. It can be seen that the optical lens provided by Example 10 has a high resolution.

[0156] Embodiment 11

[0157] Fig.11 The schematic diagram of the structure of the optical lens of Example 11 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 21, and will not be repeated here.

[0158] Table 21 shows the basic parameter table of each lens of the optical lens of Example 11.

[0159] Table 21

[0160] Table 22 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 11, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0161] Table 22

[0162] The FNO of the optical lens of Example 11 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.73; 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 10.13μm; 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 97.25%. It can be seen that the optical lens provided by Example 11 has a high resolution.

[0163] Example 12

[0164] Fig.12 The schematic diagram of the structure of the optical lens of Example 12 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be obtained according to the data in Table 23, and will not be repeated here.

[0165] Table 23 shows the basic parameter table of each lens of the optical lens of Example 12.

[0166] Table 23

[0167] Table 24 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 12, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0168] Table 24

[0169] The FNO of the optical lens of Example 12 is 1.1; the MTF value at the spatial frequency of 50lp / mm exceeds 0.74; 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 8.64μm; 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 96.63%. It can be seen that the optical lens provided by Example 12 has a high resolution.

[0170] Embodiment 13

[0171] Fig.13The schematic diagram of the structure of the optical lens of Example 13 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be obtained according to the data in Table 25, and will not be repeated here.

[0172] Table 25 shows the basic parameter table of each lens of the optical lens of Example 13.

[0173] Table 25

[0174] Table 26 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 13, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0175] Table 26

[0176] The FNO of the optical lens of Example 13 is 0.7; the MTF value at the spatial frequency of 50lp / mm exceeds 0.52; 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 9.56μm; 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 98.16%. It can be seen that the optical lens provided by Example 13 has a high resolution.

[0177] Embodiment 14

[0178] Fig.14 The schematic diagram of the structure of the optical lens of Example 14 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 27, and will not be repeated here.

[0179] Table 27 shows the basic parameter table of each lens of the optical lens of Example 14.

[0180] Table 27

[0181] Table 28 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 14, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0182] Table 28

[0183] The FNO of the optical lens of Example 14 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.73; 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 6.43μm; 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 97.95%. It can be seen that the optical lens provided by Example 14 has a high resolution.

[0184] Embodiment 15

[0185] Fig.15 The schematic diagram of the structure of the optical lens of Example 15 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 29, and will not be repeated here.

[0186] Table 29 shows the basic parameter table of each lens of the optical lens of Example 15.

[0187] Table 29

[0188] Table 30 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 15, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0189] Table 30

[0190] The FNO of the optical lens of Example 15 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.74; 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 6.43μm; 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 97.52%. It can be seen that the optical lens provided by Example 15 has a high resolution.

[0191] Example 16

[0192] Fig.16 The schematic diagram of the structure of the optical lens of Example 16 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be obtained according to the data in Table 31, and no further description is given.

[0193] Table 31 shows the basic parameter table of each lens of the optical lens of Example 16.

[0194] Table 31

[0195] Table 32 gives the cone coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 16, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0196] Table 32

[0197] The FNO of the optical lens of Example 16 is 1.1; the MTF value at the spatial frequency of 50lp / mm exceeds 0.75; 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 7.27μm; 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 96.88%. It can be seen that the optical lens provided by Example 16 has a high resolution.

[0198] Embodiment 17

[0199] Fig.17 The schematic diagram of the structure of the optical lens of Example 17 of the present application is shown. The first lens L1 has a negative focal power, the second lens L2 has a positive focal power, the third lens L3 has a negative focal power, the fourth lens L4 has a positive focal power, the fifth lens L5 has a positive focal power, and the sixth lens L6 has a positive focal power. The surface shape of each lens can be known according to the data in Table 33, and will not be repeated here.

[0200] Table 33 shows the basic parameter table of each lens of the optical lens of Example 17.

[0201] Table 33

[0202] Table 34 gives the cone coefficient k and high-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspheric surfaces S11 and S12 in Example 17, wherein each aspheric surface shape can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0203] Table 34

[0204] The FNO of the optical lens of Example 17 is 0.9; the MTF value at the spatial frequency of 50lp / mm exceeds 0.64; 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 9.55μm; 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 97.56%. It can be seen that the optical lens provided by Example 17 has a high resolution.

[0205] Tables 35 and 36 show the values ​​of parameters of the optical lens in each of Examples 1 to 17. Among them, the unit of FOV is degree (°), θ has no unit, and the units of other parameters are all millimeters (mm).

[0206] Table 35

[0207] Table 36

[0208] In summary, the optical lenses of Examples 1 to 17 satisfy the relationships shown in Table 37 and Table 38.

[0209] Table 37

[0210] Table 38

[0211] The optical lens provided in Examples 1 to 17 of the present application can be used as, for example, a vehicle-mounted lens. In this case, IMA in the structural schematic diagram of the optical lens of Examples 1 to 17 represents an imaging surface, and light from an object passes through each surface S1 to S16 in sequence and is finally imaged on an imaging surface disposed on the second side, wherein an image sensor chip is disposed at the imaging surface. It should be understood that the optical lens provided in Examples 1 to 17 of the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, IMA in the structural schematic diagram of the optical lens of Examples 1 to 17 can, for example, represent a light source surface, and light from the light source surface passes through each surface S16 to S1 in sequence and is finally projected to the first side, for example, forming an image or illuminating an area on the first side.

[0212] 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 also includes at least one of an imaging element and a light source, wherein the imaging element is used to convert the optical image formed by the optical lens into an imaging element of an electrical signal, and the light emitted by the light source is projected to the target area after passing through the optical lens to form an image or illuminate the area. When the electronic device includes an optical lens and an imaging element, the electronic device can be an independent electronic device such as a detection distance camera, an imaging module integrated on a device such as a detection distance, an independent imaging device such as a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc., an imaging module integrated on an auxiliary driving system, or a laser radar with at least a receiving end. When the electronic device includes an optical lens and a light source, the electronic device can be a projection module integrated on a mobile electronic device, an independent projection device such as a projector, or a laser radar with at least a transmitting end. When the electronic device includes an optical lens, an imaging element and a light source, the electronic device can be, for example, a laser radar with a transmitting end and a receiving end.

[0213] 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 axis includes, in order from the first side to the second side: 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 having negative optical power, wherein at least one of the first side surface and the second side surface is a concave surface; a fourth lens element having positive power, wherein the first side surface of the fourth lens element is convex; a fifth lens having optical power, wherein the first side surface is convex and the second side surface is concave; and a sixth lens having optical power, wherein the first side surface is convex and the second side surface is concave; The optical lens has six lenses with optical power; and The optical lens satisfies: 3.17≤TTL / f≤6.35 and -6.4≤f3 / f4≤-0.56; Among them, TTL is the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, f is the total effective focal length of the optical lens, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

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

3. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.18≤R10 / TTL≤2, wherein R10 is the radius of curvature of the second side surface of the fifth lens.

4. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.13≤R9 / TTL≤1.15, wherein R9 is the radius of curvature of the first side surface of the fifth lens.

5. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 0.56≤f / ENPD≤1.43;0.18≤TTL / H / FOV×1°≤0.37;0.04≤BFL / TTL≤0.17;0.06≤D / H / FOV×1°≤0.16;0.12mm -1 ≤D / H / f≤0.3mm -1 ;0.2≤(f×θ) / D≤0.53;46.3°≤(FOV×f) / H≤78.35°;-0.06≤(H / 2-f×θ / 2) / (f×θ / 2)≤-0.008; Among them, ENPD is the entrance pupil diameter of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, FOV is the maximum field of view angle of the optical lens, BFL is the distance from the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, D is the maximum light clearance aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, and θ is the radian value of the maximum field of view angle of the optical lens.

6. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 1.49≤|f1 / f|≤12.63; 0.15≤CT1 / f≤0.55; Wherein, f1 is the effective focal length of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

7. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 1.66≤f2 / f≤13.15; 0.2≤CT2 / f≤0.65; Wherein, f2 is the effective focal length of the second lens, and CT2 is the center thickness of the second 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 requirements: -14.83≤f3 / f≤-2.03; 0.12≤CT3 / f≤0.55; Wherein, CT3 is the center thickness of the third lens on the optical axis.

9. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 1.52≤f4 / f≤4.76; 0.2≤CT4 / f≤0.55; Wherein, CT4 is the center thickness of the fourth lens on the optical axis.

10. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 1.88≤|f5 / f|≤14.89; 0.33≤R9 / (CT5+R10)≤1.37; 0.06≤R9 / |f5|≤0.55; Among them, f5 is the effective focal length of the fifth lens, CT5 is the center thickness of the fifth lens on the optical axis, R9 is the curvature radius of the first side surface of the fifth lens, and R10 is the curvature radius of the second side surface of the fifth lens.

11. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 2.12≤|f6 / f|≤14.82; 0.4≤R11 / (CT6+R12)≤1.2; 0.1≤R12 / TTL≤0.25; 0.05≤R11 / |f6|≤0.32; Wherein, f6 is the effective focal length of the sixth lens, CT6 is the center thickness of the sixth lens on the optical axis, R11 is the curvature radius of the first side surface of the sixth lens, and R12 is the curvature radius of the second side surface of the sixth lens.

12. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: -1.95≤f2 / f3≤-0.21, wherein f2 is the effective focal length of the second lens.

13. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.62≤R9 / R11≤8.15, wherein R9 is the radius of curvature of the first side surface of the fifth lens, and R11 is the radius of curvature of the first side surface of the sixth lens.

14. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.71≤R11 / R12≤2.13, wherein R11 is the curvature radius of the first side surface of the sixth lens, and R12 is the curvature radius of the second side surface of the sixth lens.

15. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.32≤R7 / f4≤1.26, wherein R7 is the radius of curvature of the first side surface of the fourth lens.

16. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 0≤T12 / TTL≤0.38; 0≤T23 / TTL≤0.18; 0.02≤T34 / TTL≤0.32; 0≤T45 / TTL≤0.07; Wherein, T12 is the distance between the second side surface of the first lens and the first side surface of the second lens on the optical axis, T23 is the distance between the second side surface of the second lens and the first side surface of the third lens on the optical axis, T34 is the distance between the second side surface of the third lens and the first side surface of the fourth lens on the optical axis, and T45 is the distance between the second side surface of the fourth lens and the first side surface of the fifth lens on the optical axis.

17. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 0.15≤(T12+T34) / TTL≤0.45, wherein T12 is the distance between the second side surface of the first lens and the first side surface of the second lens on the optical axis, and T34 is the distance between the second side surface of the third lens and the first side surface of the fourth lens on the optical axis.

18. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 1.6≤f / H≤2.2, wherein H is the image height corresponding to the maximum field angle of the optical lens.

19. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies: 1.6° / mm≤FOV / f≤2.1° / mm, wherein FOV is the maximum field of view of the optical lens.

20. The optical lens according to claim 1 or 2, characterized in that: The optical lens meets at least one of the following requirements: 0.21≤R10 / TTL≤1.52;0.16≤R9 / TTL≤0.84;0.67≤f / ENPD≤1.16;3.76≤TTL / f≤5.13;0.22≤TTL / H / FOV×1°≤0.3;0.05≤BFL / TTL≤0.13;0.08≤D / H / FOV×1°≤0.13;0.14mm -1 ≤D / H / f≤0.24mm -1 ;0.24≤(f×θ) / D≤0.43;54.98°≤(FOV×f) / H≤63.28°;-0.05≤(H / 2-f×θ / 2) / (f×θ / 2)≤-0.0097;1.78≤|f1 / f|≤10.2;1.97≤f2 / f≤10.62;-11.63≤f3 / f≤-2.47;1.81≤f4 / f≤3.84;2.23≤|f5 / f|≤12.03;0.4≤R9 / (CT5+R10)≤1.1;2.52≤|f6 / f|≤11.97;0.55≤R11 / (CT6+R12)≤1;0.12≤R12 / TTL≤0.2;-1.53≤f2 / f3≤-0.26;-5.02≤f3 / f4≤-0.67;0.74≤R9 / R11≤6.58;0.85≤R11 / R12≤1.72;0.39≤R7 / f4≤1.02;0≤T12 / TTL≤0.31;0≤T23 / TTL≤0.15;0.02≤T34 / TTL≤0.26;0≤T45 / TTL≤0.06;0.18≤(T12+T34) / TTL≤0.36;1.8≤f / H≤1.95;1.75° / mm≤FOV / f≤1.85° / mm;0.1≤R9 / |f5|≤0.4;0.07≤R11 / |f6|≤0.25;0.2≤CT1 / f≤0.47;0.28≤CT2 / f≤0.57;0.16≤CT3 / f≤0.46;0.3≤CT4 / f≤0.46; Wherein, ENPD is the entrance pupil diameter of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, BFL is the distance from the second side surface of the sixth lens to the imaging surface of the optical lens on the optical axis, D is the maximum clear 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, f2 is the effective focal length of the second lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth 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, and R11 is the curvature radius of the first side surface of the fifth lens. The radius of curvature of the first side surface of the sixth lens, R12 is the radius of curvature of the second side surface of the sixth lens, R7 is the radius of curvature of the first side surface of the fourth lens, T12 is the spacing distance from the second side surface of the first lens to the first side surface of the second lens on the optical axis, T23 is the spacing 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 spacing distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, T45 is the spacing distance from the second side surface of the fourth lens to the first side surface of the fifth lens on the optical axis, CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis.

21. An electronic device, characterized in that: comprising the optical lens according to any one of claims 1 to 20, and The electronic device further comprises at least one of an imaging element and a light source, wherein The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light emitted by the light source is projected onto the target area after passing through the optical lens to form an image or illuminate an area.

Images