Optical Lens and Electronic Device

Abstract

The present application discloses an optical lens and an electronic device. The optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a negative optical power, a fourth lens with a positive optical power, a fifth lens with an optical power, and a sixth lens with an optical power; the optical lens satisfies: 3.17 ≤ TTL / f ≤ 6.35 and -6.4 ≤ f3 / f4 ≤ -0.56; where 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] In-vehicle 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 in-vehicle lenses is also increasing.

[0003] However, the in-vehicle lenses in the prior art mainly have the following problems: (1) Most of the existing in-vehicle lenses have a large f-number (FNO) and a small light entrance amount; (2) The existing in-vehicle lenses have a large number of lenses, which is not conducive to cost reduction and miniaturization.

[0004] With the increasing demand for the perception of the surrounding environment of the driving vehicle, currently, in-vehicle lenses are developing in the direction of high resolution, high light transmittance, miniaturization, etc. Summary of the Invention

[0005] One aspect of the present application provides an optical lens. The optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a negative optical power, a fourth lens with a positive optical power, a fifth lens with an optical power, and a sixth lens with an 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 with optical power in the optical lens is six; and the optical lens satisfies: 3.17 ≤ TTL / f ≤ 6.35 and -6.4 ≤ f3 / f4 ≤ -0.56; where TTL is the distance from the first side 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 further includes at least one of an imaging element and a light source. 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 through the optical lens to form an image or illuminate the area.

[0007] This application uses six lenses. By optimizing the shapes, optical powers, etc. of the respective lenses, the optical lens has at least one beneficial effect such as high resolution, high light transmittance, and miniaturization, enabling the optical lens to better meet the high requirements of in-vehicle applications. Brief Description of the Drawings

[0008] With reference to the accompanying drawings, through the following detailed description of the embodiments, other features, objectives, and advantages of this application will become more apparent. In the drawings:

[0009] Figure 1 Shows a schematic structural diagram of an optical lens according to Embodiment 1 of this application;

[0010] Figure 2 Shows a schematic structural diagram of an optical lens according to Embodiment 2 of this application;

[0011] Figure 3 Shows a schematic structural diagram of an optical lens according to Embodiment 3 of this application;

[0012] Figure 4 Shows a schematic structural diagram of an optical lens according to Embodiment 4 of this application;

[0013] Figure 5 Shows a schematic structural diagram of an optical lens according to Embodiment 5 of this application;

[0014] Figure 6 Shows a schematic structural diagram of an optical lens according to Embodiment 6 of this application;

[0015] Figure 7 Shows a schematic structural diagram of an optical lens according to Embodiment 7 of this application;

[0016] Figure 8 Shows a schematic structural diagram of an optical lens according to Embodiment 8 of this application;

[0017] Figure 9 Shows a schematic structural diagram of an optical lens according to Embodiment 9 of this application;

[0018] Figure 10 Shows a schematic structural diagram of an optical lens according to Embodiment 10 of this application;

[0019] Figure 11 Shows a schematic structural diagram of an optical lens according to Embodiment 11 of this application;

[0020] Figure 12 Shows a schematic structural diagram of an optical lens according to Embodiment 12 of this application;

[0021] Figure 13 Shows a schematic structural diagram of an optical lens according to Embodiment 13 of this application;

[0022] Figure 14 Shows a schematic structural diagram of an optical lens according to Embodiment 14 of the present application;

[0023] Figure 15 Shows a schematic structural diagram of an optical lens according to Embodiment 15 of the present application;

[0024] Figure 16 Shows a schematic structural diagram of an optical lens according to Embodiment 16 of the present application;

[0025] Figure 17 Shows a schematic structural diagram of an optical lens according to Embodiment 17 of the present application;

[0026] Figure 18 Shows a modulation transfer function curve diagram of an optical lens according to Embodiment 3 of the present application;

[0027] Figure 19 Shows a spot diagram of an optical lens according to Embodiment 3 of the present application;

[0028] Figure 20 Shows an incident energy diagram of a diffraction circle of an optical lens according to Embodiment 3 of the present application;

[0029] Figure 21 Shows a modulation transfer function curve diagram of an optical lens according to Embodiment 8 of the present application;

[0030] Figure 22 Shows a spot diagram of an optical lens according to Embodiment 8 of the present application;

[0031] Figure 23 Shows an incident energy diagram of a diffraction circle of an optical lens according to Embodiment 8 of the present application;

[0032] Figure 24 Shows a modulation transfer function curve diagram of an optical lens according to Embodiment 10 of the present application;

[0033] Figure 25 Shows a spot diagram of an optical lens according to Embodiment 10 of the present application;

[0034] Figure 26 Shows an incident energy diagram of a diffraction circle of an optical lens according to Embodiment 10 of the present application. Detailed implementation manners

[0035] 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 the exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

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

[0037] In the drawings, for the sake of convenience of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0038] It should be understood that the optical lens provided by the present application can be used for imaging, projection, and lidar lenses. When the optical lens provided by the present application is used as an imaging lens or the receiving end lens of lidar, the "first side" involved herein may refer to the object side, and the "second side" may refer to the image side. Light rays from the object side can be imaged on the image side, for example, the imaging lens can be an in-vehicle camera, an infrared camera, a drone camera, a night vision camera, a security surveillance camera, etc.; when the optical lens provided by the present application is used as a projection lens or the transmitting end lens of radar, the "first side" involved herein may refer to the object side, and the "second side" may refer to the light source side. A light source can be provided on the second side of the optical lens, and the light source can provide light rays with or without image information. The light rays from the light source side pass through the optical lens and are projected onto the first side, for example, an image can be formed on the first side or an area can be illuminated.

[0039] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made according to the general methods in the art. For example, the convexity and concavity can be judged by the sign of the R value (R refers to the radius of curvature of the paraxial region). Exemplarily, when the optical lens provided in this application is used for imaging, the surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging side is called the image side surface of the lens. For the object side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the image side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0040] It should also be understood that the terms "comprising" 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 an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features, rather than individual elements in the list. In addition, when describing the embodiments of this application, the use of "may" means "one or more embodiments of this application". And the term "exemplary" is intended to refer to an example or illustration.

[0041] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0042] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0043] In an exemplary embodiment, the optical lens may include six lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged in sequence along the optical axis from the first side to the second side.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In an exemplary embodiment, the third lens has a negative optical power. Its first side is concave and its second side is convex. The concave first side of the third lens is conducive to proper diffusion of light. Its shape is meniscus, enabling the rear diaphragm to have a larger physical aperture, achieving a larger light input and facilitating an increase in the picture illumination. The convex second side of the third lens allows the light emerging from the third lens to be incident on the subsequent optical system gently, which is beneficial to reducing the sensitivity of the lens.

[0051] In an exemplary embodiment, the third lens has a negative optical power. Its first side is convex and its second side is concave, that is, the third lens is a meniscus lens and concave towards the second side. The first side of the third lens is designed to be convex and cooperates with the second side designed to be concave, enabling the light emerging from the third lens to be incident on the subsequent optical system gently, which is beneficial to reducing the sensitivity of the lens.

[0052] In an exemplary embodiment, the third lens has a negative optical power. Its first side is concave and its second side is concave, which is conducive to receiving sufficient light, increasing the light transmission, and diffusing the light to the subsequent optical system.

[0053] In an exemplary embodiment, the fourth lens has a positive optical power. Its first side is convex and its second side is concave, that is, the fourth lens is a meniscus lens and convex towards the first side. Such an arrangement is conducive to smoothly transitioning the light entering from the first side to the subsequent optical system, facilitating the subsequent optical system to converge the light.

[0054] In an exemplary embodiment, the fourth lens has a positive optical power. Its first side is convex and its second side 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.

[0055] In an exemplary embodiment, the fifth lens has a positive optical power. Its first side is convex and its second side is concave, which can appropriately converge the front light and adjust the light trend. The convex first side of the fifth lens can collect as much light as possible into the subsequent optical system. The concave second side of the fifth lens can make the light enter the subsequent optical system smoothly as much as possible, which is beneficial to reducing the sensitivity of the lens and achieving a small front aperture.

[0056] In an exemplary embodiment, the fifth lens has a negative optical power. Its first side is convex and its second side is concave, which can appropriately diffuse the front light and adjust the light trend, enabling the light to transition smoothly. Its shape is meniscus (close to concentric circles), enabling the light converged by the large front aperture to transition smoothly. The convex first side of the fifth lens is conducive to collecting more light from the edge field of view, reducing the back focal length to a certain extent, and thus reducing the overall length of the lens.

[0057] In an exemplary embodiment, the sixth lens has a positive optical power. Its first side is convex and its second side is concave. It can converge the light rays in front and adjust the light ray path. The first side of the sixth lens is convex, which can collect as much light as possible and let it enter the rear optical system. The second side of the sixth lens is concave, which can make the light rays enter the rear optical system smoothly, helping to reduce the sensitivity of the lens.

[0058] In an exemplary embodiment, the sixth lens has a negative optical power. Its first side is convex and its second side is concave. It can diffuse the light rays in front and adjust the light ray path, enabling the light rays to have a smooth transition. The first side of the sixth lens is convex and the second side is concave, which is conducive to the proper diffusion of light rays. Its shape is meniscus, which can properly diverge the light rays collected by the large front aperture, helping to correct aberration and improve the resolution of the lens.

[0059] 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 transmission. 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 beneficial to increase the light transmission.

[0060] In an exemplary embodiment, the optical lens satisfies: 3.17 ≤ TTL / f ≤ 6.35, where f is the total effective focal length of the optical lens and TTL is the total optical length of the optical lens, that is, the distance from the first side of the first lens to the imaging surface of the optical lens on the optical axis. By controlling the above conditions, it is possible to achieve a longer focal length and miniaturization of the optical lens. More specifically, f and TTL can further satisfy 3.76 ≤ TTL / f ≤ 5.13, which can be more beneficial to achieve a longer focal length and miniaturization of the optical lens.

[0061] In an exemplary embodiment, the optical lens satisfies: 0.18 ≤ TTL / H / FOV×1° ≤ 0.37, where TTL is the distance from the first side 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 of view angle of the optical lens, and FOV is the maximum field of view angle of the optical lens. By controlling the above conditions, it is possible to achieve miniaturization and a large image surface of the optical lens. More specifically, TTL, H and FOV can further satisfy 0.22 ≤ TTL / H / FOV×1° ≤ 0.3, which can be more beneficial to achieve miniaturization and a large image surface of the optical lens.

[0062] In an exemplary embodiment, the optical lens satisfies: 0.04 ≤ BFL / TTL ≤ 0.17, where 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 focal length of the lens can be shortened, which is beneficial to the miniaturization of the lens while ensuring the space for optical element installation and focusing. More specifically, BFL and TTL further satisfy 0.05 ≤ BFL / TTL ≤ 0.13, which is more beneficial to the miniaturization of the lens.

[0063] In an exemplary embodiment, the optical lens satisfies: 0.06 ≤ D / H / FOV×1° ≤ 0.16, where D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and FOV is the maximum field of view angle of the optical lens. By controlling the above conditions, it is beneficial to reduce the front aperture of the lens, and thus beneficial to the miniaturization of the lens. More specifically, D, H, and FOV further satisfy 0.08 ≤ D / H / FOV×1° ≤ 0.13, which is more beneficial to the miniaturization of the lens.

[0064] In an exemplary embodiment, the optical lens satisfies: 0.12mm -1 ≤ D / H / f ≤ 0.3mm -1 where D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and f is the total effective focal length of the optical lens. By controlling the above conditions, under the condition of a certain total effective focal length of the optical lens, the characteristics of large image height and small aperture of the lens can be achieved. More specifically, D, H, and f further satisfy 0.14mm -1 ≤ D / H / f ≤ 0.24mm -1 which is more beneficial to achieving the characteristics of large image height and small aperture of the lens.

[0065] 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 clear 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. By controlling the above conditions, the aperture at 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 further satisfy 0.24 ≤ (f×θ) / D ≤ 0.43, which is more beneficial to the miniaturization of the lens.

[0066] 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 angle of the optical lens, and H is the image height corresponding to the maximum field of view angle 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 further satisfy 54.98° ≤ (FOV × f) / H ≤ 63.28°, which is more beneficial for the lens to have a longer focal length and further beneficial for achieving long-distance detection.

[0067] In an exemplary embodiment, the optical lens satisfies: 1.49 ≤ |f1 / f| ≤ 12.63, where 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 diverge smoothly after passing through the first lens, improving the resolution of the lens. More specifically, f1 and f further satisfy 1.78 ≤ |f1 / f| ≤ 10.2, which is more beneficial for the light to diverge smoothly after passing through the first lens and improving the resolution of the lens.

[0068] 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 that has diverged after passing through the first lens can converge slightly, and the light can converge smoothly after passing through the second lens, reducing the degree of light deflection and improving the resolution of the lens. More specifically, f2 and f further satisfy 1.97 ≤ f2 / f ≤ 10.62, which is more beneficial for reducing the degree of light deflection and improving the resolution of the lens.

[0069] In an exemplary embodiment, the optical lens satisfies: -14.83 ≤ f3 / f ≤ -2.03, where 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 transmitted through the second lens can be adjusted, and the light can converge smoothly after passing through the third lens, reducing the degree of light deflection and improving the resolution of the lens. More specifically, f3 and f further satisfy -11.63 ≤ f3 / f ≤ -2.47, which is more beneficial for reducing the degree of light deflection and improving the resolution of the lens.

[0070] 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 transmitted through the third lens can be adjusted, and the light can be smoothly converged after passing through the fourth lens, reducing the degree of light deflection and improving the resolution of the lens. More specifically, f4 and f further satisfy 1.81 ≤ f4 / f ≤ 3.84, which is more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0071] 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 transmitted through the fourth lens can be adjusted, and the light can be smoothly converged after passing through the fifth lens, reducing the degree of light deflection and improving the resolution of the lens. More specifically, f5 and f further satisfy 2.23 ≤ |f5 / f| ≤ 12.03, which is more conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0072] In an exemplary embodiment, the optical lens satisfies: 2.12 ≤ |f6 / f| ≤ 14.82, where 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 smoothly incident on the imaging surface after passing through the sixth lens, reducing the degree of light deflection and improving the resolution of the lens. More specifically, f6 and f further satisfy 2.52 ≤ |f6 / f| ≤ 11.97, which is more conducive to the light being smoothly incident on the imaging surface after passing through the sixth lens, and further conducive to reducing the degree of light deflection and improving the resolution of the lens.

[0073] In an exemplary embodiment, the optical lens satisfies: -1.95 ≤ f2 / f3 ≤ -0.21, where 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 optical power, and the third lens has a negative optical power. By reasonably distributing the focal lengths of the second lens and the third lens, it is beneficial for the light after passing through the third lens to smoothly enter the rear optical system, reducing the sensitivity of the lens and improving the resolution. More specifically, f2 and f3 further satisfy -1.53 ≤ f2 / f3 ≤ -0.26, which is more conducive to the light after passing through the third lens to smoothly enter the rear optical system, and further conducive to reducing the sensitivity of the lens and improving the resolution.

[0074] 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 optical power and the fourth lens has a positive optical power. By reasonably allocating the focal lengths of the third lens and the fourth lens, it is beneficial for the light to transition smoothly and improve the image quality. More specifically, f3 and f4 can further satisfy -5.02 ≤ f3 / f4 ≤ -0.67, which can be more beneficial for the light to transition smoothly and improve the image quality.

[0075] In an exemplary embodiment, the optical lens satisfies: 0.13 ≤ R9 / TTL ≤ 1.15, where R9 is the radius of curvature of the first surface of the fifth lens and TTL is the distance on the optical axis from the first surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the first surface of the fifth lens is positive, and the first surface is a convex surface, which can make the light converge appropriately, is beneficial for the light to deflect to the rear optical system, is beneficial for reducing the rear aperture, and improves the image quality. More specifically, R9 and TTL can further satisfy 0.16 ≤ R9 / TTL ≤ 0.84, which can be more beneficial for the light to deflect to the rear optical system, and is even more beneficial for reducing the rear aperture and improving the image quality.

[0076] In an exemplary embodiment, the optical lens satisfies: 0.18 ≤ R10 / TTL ≤ 2, where R10 is the radius of curvature of the second surface of the fifth lens and TTL is the distance on the optical axis from the first surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the second surface of the fifth lens is positive, and the second surface is a concave surface, which can make the light diverge appropriately, is beneficial for the light to transition smoothly to the rear optical system, and improves the resolution of the lens. More specifically, R10 and TTL can further satisfy 0.21 ≤ R10 / TTL ≤ 1.52, which can be more beneficial for the light to transition smoothly to the rear optical system and improve the resolution of the lens.

[0077] In an exemplary embodiment, the optical lens satisfies: 0.1 ≤ R12 / TTL ≤ 0.25, where R12 is the radius of curvature of the second surface of the sixth lens and TTL is the distance on the optical axis from the first surface of the first lens to the imaging surface of the optical lens. The radius of curvature of the second surface of the sixth lens is positive, and the second surface is a concave surface, which can make the light diverge appropriately, is beneficial for the light to transition smoothly to the rear imaging surface, and improves the resolution of the lens. More specifically, R12 and TTL can further satisfy 0.12 ≤ R12 / TTL ≤ 0.2, which can be more beneficial for the light to transition smoothly to the rear imaging surface and improve the resolution of the lens.

[0078] In an exemplary embodiment, the optical lens satisfies: 0.62 ≤ R9 / R11 ≤ 8.15, where R9 is the radius of curvature of the first surface of the fifth lens, and R11 is the radius of curvature of the first surface of the sixth lens. The first surface of the fifth lens is convex to converge light, and the first surface of the sixth lens is convex to converge light again. Through the cooperation of the fifth lens and the sixth lens, light is smoothly deflected and incident on the imaging surface, improving the resolution of the lens. More specifically, R9 and R11 further satisfy 0.74 ≤ R9 / R11 ≤ 6.58, which is more conducive to smoothly deflecting light and incident on the imaging surface, improving the resolution of the lens.

[0079] In an exemplary embodiment, the optical lens satisfies: 0.71 ≤ R11 / R12 ≤ 2.13, where R11 is the radius of curvature of the first surface of the sixth lens, R11 is the radius of curvature of the first surface of the sixth lens, and R12 is the radius of curvature of the second surface of the sixth lens. The first surface of the sixth lens is convex to converge light, and the second surface of the sixth lens is concave to receive the light converged by the first surface, so that light is smoothly deflected and incident on the imaging surface, which is beneficial to improving the resolution of the lens and reducing the sensitivity of the lens at the same time. More specifically, R11 and R12 further satisfy 0.85 ≤ R11 / R12 ≤ 1.72, which is more conducive to smoothly deflecting light and incident on the imaging surface, improving the resolution of the lens, and further conducive to reducing the sensitivity of the lens.

[0080] In an exemplary embodiment, the optical lens satisfies: 0.32 ≤ R7 / f4 ≤ 1.26, where R7 is the radius of curvature of the first surface of the fourth lens, and f4 is the effective focal length of the fourth lens. By controlling the above conditions, the excessive deflection of light by the fourth lens can be reduced, so that the light can be smoothly converged after passing through the fourth lens. More specifically, R7 and f4 further satisfy 0.39 ≤ R7 / f4 ≤ 1.02, which is more conducive to reducing the excessive deflection of light by the fourth lens, so that the light can be smoothly converged after passing through the fourth lens.

[0081] In an exemplary embodiment, the optical lens satisfies: 0.33 ≤ R9 / (CT5 + R10) ≤ 1.37, where R9 is the radius of curvature of the first surface of the fifth lens, R10 is the radius of curvature of the second surface of the fifth lens, and CT5 is the central thickness of the fifth lens on the optical axis. By controlling the curvature of the first surface and the second surface of the fifth lens, an optical path difference can be generated between the peripheral light and the central light, and the central light can be diverged into the rear optical system, improving the resolution of the lens. More specifically, R9, R10 and CT5 further satisfy 0.4 ≤ R9 / (CT5 + R10) ≤ 1.1, which is more conducive to improving the resolution of the lens.

[0082] In an exemplary embodiment, the optical lens satisfies: -0.06 ≤ (H / 2 - f×θ / 2) / (f×θ / 2) ≤ -0.008, where f is the total effective focal length of the optical lens, H is the image height 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. By controlling the above conditions, it is possible to ensure that, when the field of view angle is the same, the difference between the ideal image height and the actual image height of the lens is reduced, and the lens distortion is reduced. More specifically, H, f, and θ further satisfy -0.05 ≤ (H / 2 - f×θ / 2) / (f×θ / 2) ≤ -0.0097. When the field of view angle is the same, it is more conducive to reducing the difference between the ideal image height and the actual image height of the lens, and further conducive to reducing the lens distortion.

[0083] In an exemplary embodiment, the optical lens satisfies: 0 ≤ T12 / TTL ≤ 0.38, where 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 TTL is the distance between the first side surface of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side surface of the first lens and the first side surface of the second lens on the optical axis, the light can be appropriately diverged, making the light trend gentle, which is beneficial to improving the resolution of the lens and reducing the sensitivity of the first lens at the same time. More specifically, T12 and TTL further satisfy 0 ≤ T12 / TTL ≤ 0.31, which is more conducive to improving the resolution of the lens and further conducive to reducing the sensitivity of the first lens.

[0084] In an exemplary embodiment, the optical lens satisfies: 0 ≤ T23 / TTL ≤ 0.18, where 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, and TTL is the distance between the first side surface of the first lens and the imaging surface of the optical lens on the optical axis. By controlling the distance between the second side surface of the second lens and the first side surface of the third lens on the optical axis, the second lens can better converge the light and prevent the light from converging excessively, which is beneficial to the subsequent smooth adjustment of the deflection angle of the light by the third lens and is beneficial to improving the resolution of the lens. More specifically, T23 and TTL further satisfy 0 ≤ T23 / TTL ≤ 0.15, which is more conducive to the second lens converging the light and preventing the light from converging excessively, and is more conducive to the subsequent smooth adjustment of the deflection angle of the light by the third lens, improving the resolution of the lens.

[0085] In an exemplary embodiment, the optical lens satisfies: 0.02 ≤ T34 / TTL ≤ 0.32, where T34 is the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, and TTL is the distance on the optical axis from the first side of the first lens to the imaging surface of the optical lens. By controlling the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, the third lens can converge light better and prevent the light from converging excessively, which is beneficial to the subsequent smooth adjustment of the deflection angle of the light by the fourth lens and is beneficial to improving the resolution of the lens. More specifically, T34 and TTL further satisfy 0.02 ≤ T34 / TTL ≤ 0.26, which can be more beneficial for the third lens to converge light, prevent the light from converging excessively, and be more beneficial for the subsequent smooth adjustment of the deflection angle of the light by the fourth lens, thereby improving the resolution of the lens.

[0086] In an exemplary embodiment, the optical lens satisfies: 0 ≤ T45 / TTL ≤ 0.07, where T45 is the distance on the optical axis from the second side of the fourth lens to the first side of the fifth lens, and TTL is the distance on the optical axis from the first side of the first lens to the imaging surface of the optical lens. By controlling the distance on the optical axis from the second side of the fourth lens to the first side of the fifth lens, the fourth lens can converge light better and prevent the light from converging excessively, which is beneficial to the subsequent smooth adjustment of the deflection angle of the light by the fifth lens and is beneficial to improving the resolution of the lens. More specifically, T45 and TTL further satisfy 0 ≤ T45 / TTL ≤ 0.06, which can be more beneficial for the fourth lens to converge light, prevent the light from converging excessively, and be more beneficial for the subsequent smooth adjustment of the deflection angle of the light by the fifth lens, thereby improving the resolution of the lens.

[0087] In an exemplary embodiment, the optical lens satisfies: 0.15 ≤ (T12 + T34) / TTL ≤ 0.45, where T12 is the distance on the optical axis from the second side of the first lens to the first side of the second lens, T34 is the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, and TTL is the distance on the optical axis from the first side of the first lens to the imaging surface of the optical lens. By controlling the sum of the distance on the optical axis from the second side of the first lens to the first side of the second lens and the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, the first lens and the second lens can converge light better and prevent the light from converging excessively, which is beneficial to the subsequent smooth adjustment of the deflection angle of the light by the fourth lens and is beneficial to improving the resolution of the lens. More specifically, T12, T34, and TTL further satisfy 0.18 ≤ (T12 + T34) / TTL ≤ 0.36, which can be more beneficial for the first lens and the second lens to converge light, prevent the light from converging excessively, and is more beneficial for the subsequent smooth adjustment of the deflection angle of the light by the fourth lens, thus improving the resolution of the lens.

[0088] In an exemplary embodiment, the optical lens satisfies: 0.4 ≤ R11 / (CT6 + R12) ≤ 1.2, where CT6 is the central thickness of the sixth lens on the optical axis, R11 is the radius of curvature of the first side of the sixth lens, and R12 is the radius of curvature of the second side of the sixth lens. By controlling the curvature of the first side and the second side of the sixth lens, the light can be smoothly transitioned to the imaging surface, improving the resolution of the lens. More specifically, R11, R12, and CT6 further satisfy 0.55 ≤ R11 / (CT6 + R12) ≤ 1, which can be more beneficial for improving the resolution of the lens.

[0089] In an exemplary embodiment, the optical lens satisfies: 0.15 ≤ CT1 / f ≤ 0.55, where CT1 is the central 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 central 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 and the second side of the first lens can be improved, preventing the first lens from deflecting light too much and improving the resolution of the lens. More specifically, CT1 and f further satisfy 0.2 ≤ CT1 / f ≤ 0.47, which can be more beneficial for improving the resolution of the lens.

[0090] In an exemplary embodiment, the optical lens satisfies: 0.2 ≤ CT2 / f ≤ 0.65, where CT2 is the central 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 central 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 and the second side of the second lens can be improved, the excessive deflection of light by the second lens can be prevented, and the resolution of the lens can be improved. More specifically, CT2 and f further satisfy 0.28 ≤ CT2 / f ≤ 0.57, which is more conducive to improving the resolution of the lens.

[0091] In an exemplary embodiment, the optical lens satisfies: 0.12 ≤ CT3 / f ≤ 0.55, where CT3 is the central 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 central 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 and the second side of the third lens can be improved, the excessive deflection of light by the third lens can be prevented, and the resolution of the lens can be improved. More specifically, CT3 and f further satisfy 0.16 ≤ CT3 / f ≤ 0.46, which is more conducive to improving the resolution of the lens.

[0092] In an exemplary embodiment, the optical lens satisfies: 0.2 ≤ CT4 / f ≤ 0.55, where CT4 is the central 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 central 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 and the second side of the fourth lens can be improved, the excessive deflection of light by the fourth lens can be prevented, and the resolution of the lens can be improved. More specifically, CT4 and f further satisfy 0.3 ≤ CT4 / f ≤ 0.46, which is more conducive to improving the resolution of the lens.

[0093] 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 prevented from being excessively deflected, which is beneficial to improving the image quality. More specifically, R9 and |f5| further satisfy 0.1 ≤ R9 / |f5| ≤ 0.4, which is more conducive to improving the image quality.

[0094] In an exemplary embodiment, the optical lens satisfies: 0.05 ≤ R11 / |f6| ≤ 0.32, where R11 is the radius of curvature of the first 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 surface of the sixth lens to the effective focal length of the sixth lens, the light rays are prevented from being excessively deflected, which is beneficial to improving the image quality. More specifically, R11 and |f6| further satisfy 0.07 ≤ R11 / |f6| ≤ 0.25, which can be more beneficial to improving the image quality.

[0095] 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 of view 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 of view 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 further satisfy 1.8 ≤ f / H ≤ 1.95, which can be more beneficial to improving the resolution of the lens.

[0096] In an exemplary embodiment, the optical lens satisfies: 1.6° / mm ≤ FOV / f ≤ 2.1° / mm, where FOV is the maximum field of view angle of the optical lens, and f is the total effective focal length of the optical lens. By controlling the maximum field of view angle 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 further satisfy 1.75° / mm ≤ FOV / f ≤ 1.85° / mm, which can be more beneficial to achieving long-distance detection.

[0097] In an exemplary embodiment, the optical lens may include a diaphragm provided for restricting the light beam to further improve the imaging quality of the optical lens. Exemplarily, the diaphragm may be disposed between the fourth lens and the fifth lens. However, it should be noted that the position of the diaphragm disclosed herein is only an example and not a limitation; in an alternative embodiment, the diaphragm may also be disposed at other positions according to actual needs.

[0098] In an exemplary embodiment, according to requirements, 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 can filter light rays with different wavelengths, and the protective glass can prevent the components (e.g., chips) on the second side of the optical lens from being damaged.

[0099] In an exemplary embodiment, the first lens to the sixth lens may be spherical lenses or aspherical lenses. 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 be aspherical lenses. Characteristics of aspherical lenses: The curvature changes continuously from the center to the periphery of the lens. Different from spherical lenses with a constant curvature from the center to the periphery of the lens, aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and astigmatism aberration. After using aspherical lenses, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality of the lens. The setting of aspherical lenses helps to correct system aberration and improve the resolution. Specifically, for example, when focusing on the resolution quality, all lenses can use aspherical lenses. Exemplarily, the sixth lens is an aspherical lens, which can adjust the light path to converge onto the imaging surface, can better correct aberration, and improve the resolution of the lens.

[0100] In an exemplary embodiment, the first lens to the sixth lens may be glass lenses and / or plastic lenses. The present application does not specifically limit the specific number of glass lenses and plastic lenses. Optical lenses made of glass can suppress the shift of the back focal length of the optical lens with temperature changes, so as to improve the stability of the optical lens. Using glass materials can avoid problems such as blurred imaging of the lens 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, all lenses can use glass lenses.

[0101] According to the above embodiments of the present application, through reasonable settings of parameters such as the shape and optical power of each lens, the optical lens can have at least one beneficial effect such as high resolution, miniaturization, small front aperture, high light throughput, large image plane, small distortion, long focal length, and high imaging quality.

[0102] However, those skilled in the art should understand that without departing from the technical solutions 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.

[0103] It should be noted that the optical lenses provided in Embodiment 1 to Embodiment 17 of the present application can all achieve good imaging quality, and their spot diagrams, diffraction circle energy input diagrams, and modulation transfer function (MTF) curves are all relatively close. Therefore, the Figures 18 to 26Only the spot diagrams, diffraction encircled energy diagrams, and modulation transfer function (MTF) curves of Embodiment 3, Embodiment 8, and Embodiment 10 are shown exemplarily, and the spot diagrams, diffraction encircled energy diagrams, and modulation transfer function (MTF) curves of other embodiments are not shown one by one, and those skilled in the art should also be able to obtain them according to the content disclosed in this application.

[0104] The full name of MTF is modulation transfer function, which is called modulation transfer function in Chinese. It describes the ability of an optical system to "restore" the object space in the image space. The abscissa of the modulation transfer function curve is the spatial frequency, and the unit of the spatial frequency is line pairs per millimeter (lp / mm), and the ordinate is the MTF value. The MTF values of the MTF curves of the optical lens provided in this application are all above 0.5 at 50 lp / mm, which can meet the required image quality requirements.

[0105] The spot diagram shows the light condensing state of light rays with different wavelengths on the imaging surface. Among them, RMS (Root Mean Square) is used to describe the size of the blur spot caused by 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 square root of the average value of the sum of the squares of the coordinates of each point of the blur spot relative to the center point, so as to quantitatively reflect the actual spot size of the system. The RMS radius of the light spot in the edge field of view in the spot diagram of the optical lens provided in this application is less than 15 μm on the imaging surface.

[0106] The diffraction encircled energy diagram is used to describe the energy distribution of the light beam in a certain specific area after passing through the optical system, and reflects the concentration degree of the light spot energy. Specifically, it refers to the ratio of the light intensity or energy contained within a certain radius range 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 this application, within a circle with a diameter of 15 μm on the imaging surface, the proportion of the light spot energy in the total light energy exceeds 95%.

[0107] The following further describes specific embodiments of the optical lens applicable to the above embodiments with reference to the accompanying drawings.

[0108] Embodiment 1

[0109] Figure 1 The structural schematic diagram of the optical lens according to Embodiment 1 of this application is shown. As Figure 1 shown, the optical lens sequentially 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 along the optical axis from the first side to the second side.

[0110] The first lens L1 has a negative optical power, its first side S1 is concave, and its second side S2 is concave. The second lens L2 has a positive optical power, its first side S3 is convex, and its second side S4 is convex. The third lens L3 has a negative optical power, its first side S5 is concave, and its second side S6 is concave. The fourth lens L4 has a positive optical power, its first side S7 is convex, and its second side S8 is concave. The fifth lens L5 has a positive optical power, its first side S9 is convex, and its second side S10 is concave. The sixth lens L6 has a negative optical power, its first side S11 is convex, and its second side S12 is concave.

[0111] The optical lens may further include a diaphragm STO, and the diaphragm STO may be disposed between the fourth lens L4 and the fifth lens L5.

[0112] The optical lens may further include a filter L7 having a first side S13 and a second side S14, and a protective glass L8 having a first side S15 and a second side S16.

[0113] Table 1 shows the basic parameter table of each lens of the optical lens of Example 1.

[0114] Table 1

[0115]

[0116] In this embodiment, both the first side S11 and the second side S12 of the sixth lens L6 are aspherical surfaces, and the surface profiles of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0117] (1);

[0118] Where x is the sagitta, the distance from the vertex of the aspherical surface at the position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 1.

[0119] Table 2

[0120]

[0121] The FNO of the optical lens of Example 1 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.72; in terms of the RMS of the spot diagram, in the marginal field of view, the root mean square radius of the spot on the image plane is 13.4 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 96.95%. It can be seen from this that the optical lens provided in Example 1 has high resolution.

[0122] Example 2

[0123] In this example and the following examples, for the sake of simplicity, some descriptions similar to those in Example 1 will be omitted.

[0124] Figure 2 The structural schematic diagram of the optical lens of Example 2 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power. The surface types of each lens can be obtained according to the data in Table 3 and will not be elaborated here.

[0125] Table 3 shows the basic parameter table of each lens of the optical lens of Example 2.

[0126] Table 3

[0127]

[0128] Table 4 gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Example 2. Among them, each aspherical surface type can be defined by, but is not limited to, the formula (1) given in the above Example 1.

[0129] Table 4

[0130]

[0131] The FNO of the optical lens of Example 2 is 0.7; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.6; in terms of the RMS of the spot diagram, in the marginal field of view, the root mean square radius of the spot on the image plane is 14.82 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.82%. It can be seen from this that the optical lens provided in Example 2 has high resolution.

[0132] Example 3

[0133] Figure 3The schematic structural diagram of the optical lens according to Embodiment 3 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power. The surface types of the respective lenses can be obtained from the data in Table 5, and will not be elaborated here.

[0134] Table 5 shows the basic parameter table of each lens of the optical lens according to Embodiment 3.

[0135] Table 5

[0136]

[0137] Table 6 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Embodiment 3. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Embodiment 1 above.

[0138] Table 6

[0139]

[0140] The FNO of the optical lens according to Embodiment 3 is 0.9; as Figure 18 shown, the MTF value of the optical lens according to Embodiment 3 at a spatial frequency of 50 lp / mm exceeds 0.71; as Figure 19 shown, in terms of the point spread function RMS of the optical lens according to Embodiment 3, in the marginal field of view, the root mean square radius of the spot on the image plane is 5.649 μm; as Figure 20 shown, in terms of the energy entering the diffraction circle of the optical lens according to Embodiment 3, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 98%. It can be seen from this that the optical lens provided by Embodiment 3 has a high resolution.

[0141] Embodiment 4

[0142] Figure 4 The schematic structural diagram of the optical lens according to Embodiment 4 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power. The surface types of the respective lenses can be obtained from the data in Table 7, and will not be elaborated here.

[0143] Table 7 shows the basic parameter table of each lens of the optical lens according to Embodiment 4.

[0144] Table 7

[0145]

[0146] Table 8 gives the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 4. Among them, each aspherical surface type can be defined by, but is not limited to, the formula (1) given in the above Example 1.

[0147] Table 8

[0148]

[0149] The FNO of the optical lens of Example 4 is 1.1; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.74; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 5.29 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.57%. It can be seen from this that the optical lens provided in Example 4 has a high resolution.

[0150] Example 5

[0151] Figure 5 Fig. shows a schematic structural diagram of the optical lens according to Embodiment 5 of the present application. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power. The surface types of each lens can be obtained according to the data in Table 9 and will not be elaborated here.

[0152] Table 9 shows the basic parameter table of each lens of the optical lens of Example 5.

[0153] Table 9

[0154]

[0155] Table 10 gives the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 5. Among them, each aspherical surface type can be defined by, but is not limited to, the formula (1) given in the above Example 1.

[0156] Table 10

[0157]

[0158] The FNO of the optical lens of Example 5 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.7; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 8.4 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.23%. It can be seen from this that the optical lens provided in Example 5 has high resolving power.

[0159] Example 6

[0160] Figure 6 Fig. shows a schematic structural diagram of the optical lens of Example 6 of the present application. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a negative optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 11 and will not be elaborated here.

[0161] Table 11 shows the basic parameter table of each lens of the optical lens of Example 6.

[0162] Table 11

[0163]

[0164] Table 12 gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Example 6. Among them, the aspherical surface types can be defined by, but are not limited to, the formula (1) given in the above Example 1.

[0165] Table 12

[0166]

[0167] The FNO of the optical lens of Example 6 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.69; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 11.05 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 96.23%. It can be seen from this that the optical lens provided in Example 6 has high resolving power.

[0168] Example 7

[0169] Figure 7The structural schematic diagram of the optical lens according to Embodiment 7 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a negative optical power, and the sixth lens L6 has a positive optical power. The surface types of the respective lenses can be obtained from the data in Table 13, which will not be elaborated here.

[0170] Table 13 shows the basic parameter table of the respective lenses of the optical lens according to Embodiment 7.

[0171] Table 13

[0172]

[0173] Table 14 gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Embodiment 7. Among them, the respective aspherical surface types can be defined by, but are not limited to, the formula (1) given in the above Embodiment 1.

[0174] Table 14

[0175]

[0176] The FNO of the optical lens according to Embodiment 7 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.62; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 9.54 μm; in terms of the energy within the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.13%. It can be seen from this that the optical lens provided by Embodiment 7 has a high resolving power.

[0177] Embodiment 8

[0178] Figure 8 The structural schematic diagram of the optical lens according to Embodiment 8 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a negative optical power, and the sixth lens L6 has a positive optical power. The surface types of the respective lenses can be obtained from the data in Table 15, which will not be elaborated here.

[0179] Table 15 shows the basic parameter table of the respective lenses of the optical lens according to Embodiment 8.

[0180] Table 15

[0181]

[0182] Table 16 gives the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 8. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0183] Table 16

[0184]

[0185] The FNO of the optical lens of Example 8 is 0.9; as Figure 21 shown, the MTF value of the optical lens of Example 8 at a spatial frequency of 50 lp / mm exceeds 0.72; as Figure 22 shown, in terms of the RMS of the spot diagram of the optical lens of Example 8, at the edge field of view, the root mean square radius of the spot on the image plane is 6.575 μm; as Figure 23 shown, in terms of the energy entering the diffraction circle of the optical lens of Example 8, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.75%. It can be seen from this that the optical lens provided in Example 8 has a high resolution.

[0186] Example 9

[0187] Figure 9 Fig. shows a schematic structural diagram of the optical lens of Embodiment 9 of the present application. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a negative optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be known according to the data in Table 17 and will not be elaborated here.

[0188] Table 17 shows the basic parameter table of each lens of the optical lens of Example 9.

[0189] Table 17

[0190]

[0191] Table 18 gives the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 9. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in the above Example 1.

[0192] Table 18

[0193]

[0194] The FNO of the optical lens of Example 9 is 1.1; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.53; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 8.23 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 95.13%. It can be seen from this that the optical lens provided in Example 9 has a high resolving power.

[0195] Example 10

[0196] Figure 10 The structural schematic diagram of the optical lens of Example 10 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 19 and will not be elaborated here.

[0197] Table 19 shows the basic parameter table of each lens of the optical lens of Example 10.

[0198] Table 19

[0199]

[0200] Table 20 gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Example 10. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0201] Table 20

[0202]

[0203] The FNO of the optical lens of Example 10 is 0.9; as Figure 24 shown, the MTF value of the optical lens of Example 10 at a spatial frequency of 50 lp / mm exceeds 0.74; as Figure 25 shown, in terms of the RMS of the spot diagram of the optical lens of Example 10, at the edge field of view, the root mean square radius of the spot on the image plane is 7.283 μm; as Figure 26 shown, in terms of the energy entering the diffraction circle of the optical lens of Example 10, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.58%. It can be seen from this that the optical lens provided in Example 10 has a high resolving power.

[0204] Example 11

[0205] Figure 11The structural schematic diagram of the optical lens according to Embodiment 11 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 21, which will not be elaborated here.

[0206] Table 21 shows the basic parameter table of each lens of the optical lens according to Embodiment 11.

[0207] Table 21

[0208]

[0209] Table 22 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Embodiment 11. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Embodiment 1 above.

[0210] Table 22

[0211]

[0212] The FNO of the optical lens according to Embodiment 11 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.73; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 10.13 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.25%. It can be seen from this that the optical lens provided by Embodiment 11 has a high resolution.

[0213] Embodiment 12

[0214] Figure 12 The structural schematic diagram of the optical lens according to Embodiment 12 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 23, which will not be elaborated here.

[0215] Table 23 shows the basic parameter table of each lens of the optical lens according to Embodiment 12.

[0216] Table 23

[0217]

[0218] Table 24 gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 12. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0219] Table 24

[0220]

[0221] The FNO of the optical lens of Example 12 is 1.1; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.74; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 8.64 μm; in terms of the energy within the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 96.63%. It can be seen from this that the optical lens provided in Example 12 has a high resolution.

[0222] Example 13

[0223] Figure 13 Fig. shows a schematic structural diagram of the optical lens of Example 13 of the present application. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 25 and will not be elaborated here.

[0224] Table 25 shows the basic parameter table of each lens of the optical lens of Example 13.

[0225] Table 25

[0226]

[0227] Table 26 gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 13. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0228] Table 26

[0229]

[0230] The FNO of the optical lens of Example 13 is 0.7; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.52; in terms of the RMS of the spot diagram, in the marginal field of view, the root mean square radius of the spot on the image plane is 9.56 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 98.16%. It can be seen from this that the optical lens provided in Example 13 has a high resolution.

[0231] Example 14

[0232] Figure 14 The structural schematic diagram of the optical lens of Example 14 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 27, and will not be elaborated here.

[0233] Table 27 shows the basic parameter table of each lens of the optical lens of Example 14.

[0234] Table 27

[0235]

[0236] Table 28 gives the conic coefficients k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Example 14. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0237] Table 28

[0238]

[0239] The FNO of the optical lens of Example 14 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.73; in terms of the RMS of the spot diagram, in the marginal field of view, the root mean square radius of the spot on the image plane is 6.43 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.95%. It can be seen from this that the optical lens provided in Example 14 has a high resolution.

[0240] Example 15

[0241] Figure 15The structural schematic diagram of the optical lens according to Embodiment 15 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 29, which will not be elaborated here.

[0242] Table 29 shows the basic parameter table of each lens of the optical lens according to Embodiment 15.

[0243] Table 29

[0244]

[0245] Table 30 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16 for the aspherical surfaces S11 and S12 that can be used in Embodiment 15. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Embodiment 1 above.

[0246] Table 30

[0247]

[0248] The FNO of the optical lens according to Embodiment 15 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.74; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 6.43 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.52%. It can be seen from this that the optical lens provided by Embodiment 15 has a high resolution.

[0249] Embodiment 16

[0250] Figure 16 The structural schematic diagram of the optical lens according to Embodiment 16 of the present application is shown. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 31, which will not be elaborated here.

[0251] Table 31 shows the basic parameter table of each lens of the optical lens according to Embodiment 16.

[0252] Table 31

[0253]

[0254] Table 32 gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 16. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0255] Table 32

[0256]

[0257] The FNO of the optical lens of Example 16 is 1.1; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.75; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 7.27 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 96.88%. It can be seen that the optical lens provided in Example 16 has a high resolution.

[0258] Example 17

[0259] Figure 17 FIG. shows a schematic structural diagram of the optical lens of Example 17 of the present application. The first lens L1 has a negative optical power, the second lens L2 has a positive optical power, the third lens L3 has a negative optical power, the fourth lens L4 has a positive optical power, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a positive optical power. The surface types of each lens can be obtained according to the data in Table 33 and will not be elaborated here.

[0260] Table 33 shows the basic parameter table of each lens of the optical lens of Example 17.

[0261] Table 33

[0262]

[0263] Table 34 gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S11 and S12 in Example 17. Among them, each aspherical surface type can be defined by, but not limited to, the formula (1) given in Example 1 above.

[0264] Table 34

[0265]

[0266] The FNO of the optical lens of Example 17 is 0.9; the MTF value at a spatial frequency of 50 lp / mm exceeds 0.64; in terms of the RMS of the spot diagram, at the edge field of view, the root mean square radius of the spot on the image plane is 9.55 μm; in terms of the energy entering the diffraction circle, within a circle with a diameter of 15 μm on the image plane, the proportion of the spot energy in the total light energy exceeds 97.56%. It can be seen from this that the optical lens provided in Example 17 has a high resolution.

[0267] Tables 35 and 36 give the values of the parameters of the optical lenses in Examples 1 to 17. Among them, the unit of FOV is degree (°), θ has no unit, and the units of other parameters are all millimeter (mm).

[0268] Table 35

[0269]

[0270] Table 36

[0271]

[0272] In summary, the optical lenses of Examples 1 to 17 satisfy the relationships shown in Tables 37 and 38.

[0273] Table 37

[0274]

[0275] Table 38

[0276]

[0277] The optical lenses provided in Embodiments 1 to 17 of the present application can be used as, for example, vehicle-mounted lenses. At this time, in the structural schematic diagram of the optical lenses of Embodiments 1 to 17, IMA represents the imaging plane, and the light from the object sequentially passes through each surface S1 to S16 and finally forms an image on the imaging plane provided on the second side, wherein an image sensing chip is provided at the imaging plane. It should be understood that the optical lenses provided in Embodiments 1 to 17 of the present application can also be used as, for example, projection lenses or the transmitting end lenses of lidar. At this time, in the structural schematic diagram of the optical lenses of Embodiments 1 to 17, IMA can, for example, represent the light source plane, and the light from the light source plane sequentially passes through each surface S16 to S1 and finally projects to the first side, for example, an image or an illuminated area can be formed on the first side.

[0278] The present application also provides an electronic device, which may include an optical lens according to the above embodiments of the present application, and further includes at least one of an imaging element and a light source. The imaging element is configured to convert the optical image formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto a target area 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 may be an independent electronic device such as a detection distance camera, an imaging module integrated on a detection distance device, 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., or an imaging module integrated on an auxiliary driving system, or may also be a lidar having at least a receiving end. When the electronic device includes an optical lens and a light source, the electronic device may be a projection module integrated on a mobile electronic device, an independent projection device such as a projector, or may also be a lidar having at least a transmitting end. When the electronic device includes an optical lens, an imaging element and a light source, the electronic device may be, for example, a lidar having a transmitting end and a receiving end, etc.

[0279] The above description is only a preferred embodiment of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and 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 technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

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; The optical lens is a telephoto lens; and The optical lens meets the following requirements: 3.76≤TTL / f≤5.13, -6.4≤f3 / f4≤-0.56, 1.6≤f / H≤2.2, 0.33≤R9 / (CT5+R10)≤1.37; 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, f4 is the effective focal length of the fourth lens, H is the image height corresponding to the maximum field angle of the optical 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.

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;0.06≤R9 / f5 ≤0.55; Wherein, f5 is the effective focal length 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° / mm≤FOV / f≤2.1° / mm, wherein FOV is the maximum field of view of the optical lens.

19. 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;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.

20. An electronic device, characterized in that: comprising the optical lens according to any one of claims 1 to 19, 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