Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens includes six lenses with optical power in sequence from the first side to the second side along the optical axis: a first lens with negative optical power, which is meniscus-shaped as a whole; a second lens with negative optical power, whose first side is concave; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with optical power, whose first side is convex and whose second side is concave; and a sixth lens with optical power, whose first side is convex and whose second side is concave; the optical lens satisfies: 0<(F / F4) / (R9 / TTL)≤1.5, 0≤R10 / TTL≤2.5. The optical lens disclosed in the present application can achieve at least one technical effect of high resolution, small FNO and low sensitivity.

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] LiDAR 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 LiDAR lenses is increasing, and is moving towards the pursuit of high-resolution capabilities.

[0003] In addition, in order to achieve the purpose of safe driving and the installation requirements of special installation locations, the lidar lenses in the autonomous driving assistance system have other more special requirements compared to ordinary optical lenses. For example, in order to achieve long-distance measurement, the light transmittance of the receiving end lens module needs to be increased, which in turn requires the realization of a small FNO.

[0004] However, the optical lenses in the related art, especially those used in LiDAR, have poor resolution or cannot achieve FNO, and cannot achieve both high resolution and small FNO. Summary of the invention

[0005] One aspect of the present application provides an optical lens, which includes six lenses with optical power in sequence from the first side to the second side along the optical axis: a first lens with negative optical power, which is meniscus-shaped as a whole; a second lens with negative optical power, whose first side surface is concave; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with optical power, whose first side surface is convex and whose second side surface is concave; and a sixth lens with optical power, whose first side surface is convex and whose second side surface is concave; by setting the first two lenses (the first lens and the second lens) as negative optical power lenses, the incident light is continuously and smoothly diffused, thereby increasing the light throughput of the optical system and reducing the pressure of imaging of subsequent lenses. force, which is conducive to better achieving high resolution and small FNO of the system; the fifth lens and the sixth lens are both convex and concave, which play a role in continuously converging light, so that the light passing through the fourth lens converges smoothly to the imaging surface, corrects the edge field aberration, reduces the sensitivity of the rear lens, and thus helps to improve the imaging quality, and is also conducive to the small aperture at the rear end; the optical lens also satisfies: 0<(F / F4) / (R9 / TTL)≤1.5, 0≤R10 / TTL≤2.5, where F is the total effective focal length of the optical lens, F4 is the effective focal length of the fourth lens, R9 is the radius of curvature of the first side of the fifth lens, R10 is the radius of curvature of the second side of the fifth lens, and TTL is the total optical length of the optical lens. Among them, the fourth lens can converge the light from the front optical system. Specifically, the smaller the effective focal length value of the fourth lens, the stronger the ability to deflect light, and the higher the acceptance capacity requirement for the fifth lens behind the fourth lens, and the radius of curvature of the first side of the fifth lens plays a key role in accepting the light passing through the fourth lens. By making the optical lens condition 0<(F / F4) / (R9 / TTL)≤1.5, the curvature radius of the first side of the fifth lens is controlled, which is conducive to smooth transition and convergence of light and reduces the introduction of aberrations; the second side of the fifth lens is a concave surface, and by making the optical lens meet the condition 0≤R10 / TTL≤2.5, the curvature radius of the second side of the fifth lens is reasonably controlled to make the light diverge appropriately, which is conducive to smooth transition of light to the rear optical system and improve the resolution. The optical lens provided by the present application has at least one beneficial effect of miniaturization, small FNO, high light flux, low sensitivity and high resolution.

[0006] Another aspect of the present application provides an electronic device, comprising the optical lens of any of the above embodiments, and an imaging element for converting an optical image formed by the optical lens into an electrical signal, or a light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of the embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0008] Figures 1 to 21 Schematic diagrams showing the structures of optical lenses according to Embodiments 1 to 21 of the present application respectively; and

[0009] Figure 22 to Figure 27 Schematic diagrams of MTF curves of optical lenses according to Embodiment 3, Embodiment 8, Embodiment 9, Embodiment 10, Embodiment 18 and Embodiment 21 of the present application are respectively shown. DETAILED DESCRIPTION

[0010] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0011] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0012] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0013] In this article, the paraxial area refers to the area 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 area; 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 area. The surface of each lens closest to the first side is called the first side of the lens, the surface of each lens closest to the second side is called the second side of the lens, and the surface of the optical lens closest to the second side is called the second side of the optical lens. It should be understood that the optical lens provided in the present application can be used for both imaging and projection, and can also be used for lidar lenses. When the optical lens provided in the present application is used for a camera lens or a laser radar receiving end lens, the camera lens may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. The "first side" mentioned in this document may refer to the object side, and the "second side" may refer to the image side. The light from the object side may be imaged on the image side; when the optical lens provided in the present application is used for a projection lens or a radar transmitting end lens, the "first side" mentioned in this document may refer to the object side, and the "second side" may refer to the light source side. The light from the light source side is projected to the first side after passing through the optical lens, and forms an image or illuminates the area on the first side.

[0014] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

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

[0016] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail with reference to the accompanying drawings and in combination with the embodiments. The features, principles and other aspects of the present application are described in detail below.

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

[0018] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens can be provided with an imaging surface of the optical lens.

[0019] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens, in which case the first side of the optical lens can be the object side, and the second side can be the light source side. Light from the light source side passes through the optical lens and is projected to the object side, and forms an image or illuminates an area on the object side, and the second side of the optical lens can be provided with a light source surface of the optical lens.

[0020] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side surface. Optionally, the photosensitive element disposed on the second side surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0021] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the fourth lens and the fifth lens to further improve the imaging quality of the optical lens. The aperture is conducive to converging the light entering the optical system, balancing the aperture sizes of the lenses in the front and rear optical systems, and can achieve a small FNO of the optical lens while smoothing the light trend. However, it should be noted that the position of the aperture disclosed herein is only an example and not a limitation; in alternative embodiments, the aperture may also be set at other positions according to actual needs.

[0022] In an exemplary embodiment, the first lens may have a negative focal power, and its first side surface may be a concave surface, and its second side surface may be a convex surface, and its shape may be a meniscus as a whole. The first lens has a negative focal power, and the first side surface is a concave surface, which is conducive to the proper diffusion of light. The shape of the first lens is a meniscus, which can expand the physical aperture of the aperture, which is conducive to achieving a larger amount of light entering, and thus is conducive to increasing the illumination of the picture. The second side surface of the first lens is a convex surface, which can make the light emitted through the first lens smoothly incident on the rear optical system, which is conducive to reducing sensitivity. In an exemplary embodiment, the first lens may have a negative focal power, and its first side surface may be a convex surface, and the second side surface may be a concave surface. The first lens has a negative focal power, which can diverge light, disperse the central light and the edge light of each field of view, and at the same field of view angle, the light emitted through the second side surface of the first lens can make the rear optical system have a larger light receiving surface, so that the physical aperture of the aperture is expanded, and a larger amount of light entering is achieved, which is conducive to increasing the illumination of the picture. The first side surface of the first lens is convex, and the second side surface is concave, so that the light emitted by the first lens can be smoothly incident on the rear optical system, which is helpful to reduce sensitivity. In addition, the first side surface of the first lens is convex, which can also help water droplets to slide off in practical applications, reducing the impact of water droplets on the imaging of the optical lens.

[0023] In an exemplary embodiment, the second lens may have a negative optical focal length, and its first side surface may be a concave surface, and the second side surface may be a convex surface. In an exemplary embodiment, the second lens may be meniscus-shaped as a whole. The second lens is provided with a negative optical focal length, and its shape is meniscus-shaped, and the first side surface is a concave surface, so that the light diverged from the first lens can be received, and the light can be appropriately diffused. The second side surface of the second lens is made convex, so that the light can be smoothly transitioned to the rear optical system, thereby improving the resolution. In an exemplary embodiment, the second lens may have a negative optical focal length, and its first side surface may be a concave surface, and the second side surface may be a concave surface. The second lens is provided with a negative optical focal length, and both the first side surface and the second side surface are concave surfaces, so that the light from the front optical system can be collected, and the light can be appropriately diffused into the rear optical system, so that the light can be smoothly transitioned, which is conducive to improving the resolution and compressing the distortion.

[0024] In an exemplary embodiment, the third lens may have positive focal power, and its first side surface may be convex, and its second side surface may be convex. The third lens has positive focal power and its first side surface is convex, so as to collect as much light as possible to enter the rear optical system. The second side surface of the third lens is convex, so that the light can be quickly compressed and transferred to the rear optical system, which is convenient for the rear system to receive the light, reduce the aperture of the rear system, and is conducive to miniaturization. In an exemplary embodiment, the third lens may have positive focal power, and its first side surface may be concave, and its second side surface may be convex. The third lens has positive focal power and its first side surface is concave, which is conducive to proper diffusion of light, so that the first side surface of the third lens can receive the light diverged from the second lens, and reduce the deflection of light. In an exemplary embodiment, the third lens may be meniscus-shaped as a whole, so that the light can be smoothly converged to the fourth lens. In an exemplary embodiment, the third lens plays the role of receiving the front and rear optical systems in the entire optical lens, and can deflect the light entering the front optical system at a smaller angle, while better correcting the aberration, ensuring the low sensitivity of the system, and improving the resolution. In an exemplary embodiment, the third lens may have positive power, and its first side surface may be convex and its second side surface may be concave. The third lens has positive power and its first side surface is convex, so as to collect as much light as possible into the rear optical system and improve the system light flux. The second side surface of the third lens is concave, so that the light can enter the rear optical system as smoothly as possible, which is conducive to reducing the sensitivity of the system.

[0025] In an exemplary embodiment, the fourth lens may have positive focal power, and its first side surface may be convex, and its second side surface may be concave. The fourth lens has positive focal power and cooperates with the third lens to converge and converge the light, and then the light is smoothly transferred to the rear optical system after passing through the third lens and the fourth lens, which is conducive to reducing the diameter of the rear port while reducing sensitivity and improving resolution. In an exemplary embodiment, the fourth lens is meniscus-shaped as a whole. The shape of the fourth lens is meniscus-shaped, and the first side surface is convex, which is conducive to smoothly transitioning the light transmitted from the front optical system to the rear optical system, facilitating the rear system to converge the light and smoothly image. In an exemplary embodiment, the fourth lens may have positive focal power, and its first side surface may be concave, and its second side surface may be convex. The fourth lens has positive focal power and cooperates with the third lens to converge and converge the light, and then the light is smoothly transferred to the rear optical system after passing through the third lens and the fourth lens, which is conducive to reducing the diameter of the rear port while reducing sensitivity and improving resolution. In an exemplary embodiment, the fourth lens is meniscus-shaped as a whole. The shape of the fourth lens is a meniscus, and the first side surface is a concave surface, which is conducive to proper diffusion of light, so that the fourth lens can better receive the light diverged from the third lens, and can make the light trend transition smoothly. In an exemplary embodiment, the fourth lens can have positive focal length, and its first side surface can be convex, and its second side surface can be convex. The fourth lens has positive focal length, and the first side surface and the second side surface are both convex, and cooperates with the third lens, which is conducive to compressing the light collected by the front optical system, reducing the aperture of the rear optical system lens, and realizing miniaturization.

[0026] In an exemplary embodiment, the fifth lens may have positive focal power, and its first side surface may be convex, and its second side surface may be concave. The fifth lens has positive focal power, which is conducive to the proper convergence of light. The first side surface of the fifth lens is convex, and the second side surface is concave, which can make the light collected by the front large aperture properly converged, and make the angle of the light passing through the front and rear lenses of the fifth lens (such as the fourth lens and the sixth lens) more gentle, which is conducive to correcting aberrations and improving the resolution of the system. In an exemplary embodiment, the fifth lens may have negative focal power, and its first side surface may be convex, and the second side surface may be concave. The fifth lens has negative focal power, which is conducive to the proper diffusion of light. In an exemplary embodiment, the fifth lens is meniscus-shaped as a whole. The first side surface of the fifth lens is convex, the second side surface is concave, and the shape is meniscus-shaped, which can make the light collected by the front large aperture properly diverge, and make the angle of the light passing through the front and rear lenses of the fifth lens (such as the fourth lens and the sixth lens) more gentle, which is conducive to correcting aberrations and improving the resolution of the system.

[0027] In an exemplary embodiment, the sixth lens may have positive focal power, and its first side surface may be convex, and its second side surface may be concave. The sixth lens may have positive focal power, which is conducive to the proper convergence of light. The first side surface of the sixth lens is convex, and the second side surface is concave, which can make the light collected by the large front aperture of the fifth lens properly converged and smoothly deflected and transitioned, which is conducive to compressing the aperture, and can reduce the back focus to a certain extent, thereby reducing the total length of the system, and can correct aberrations while achieving system miniaturization, and improve the system resolution. In such an embodiment, the sixth lens can fully correct various aberrations of the optical system, and can improve the resolution, optimize the distortion, CRA and other optical properties while ensuring the compact structure of the optical lens. In an exemplary embodiment, the sixth lens may have negative focal power, and its first side surface may be convex, and the second side surface may be concave. The sixth lens may have negative focal power, which can collect the light passing through the fifth lens, and can make the light trend smoothly transition, which is conducive to improving the resolution. The first side surface of the sixth lens is a convex surface, which is conducive to receiving the light collected by the large aperture of the front end of the fifth lens, and is conducive to collecting the edge field light, thereby increasing the luminous flux. The second side surface of the sixth lens is a concave surface, which can make the light beam trend smooth, which is conducive to correcting aberrations and improving the resolution of the system. In such an embodiment, the sixth lens can fully correct various aberrations of the optical system, and can improve the resolution, optimize the distortion, CRA and other optical performances while ensuring the compact structure of the optical lens.

[0028] Figure 1 The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. Figure 1 IMA represents an imaging surface, and light from an object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface arranged on the second side, wherein an image sensor chip is arranged on the imaging surface. It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 1 Here, IMA represents a light source surface, and light from the light source surface passes through the surfaces S17 to S1 in sequence and is finally projected to the first side, and forms an image or an illuminated area on the first side.

[0029] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the sixth lens and the imaging surface, the filter may filter light with different wavelengths, and the protective glass may prevent the elements (e.g., chip) on the second side of the optical lens from being damaged.

[0030] In the present application, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length 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, D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and BFL is the optical The optical back focus of the lens, 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, θ is the radian value corresponding to the maximum field angle of the optical lens, R11 is the curvature radius of the first side surface of the sixth lens, R3 is the curvature radius of the first side surface of the second lens, T56 is the spacing distance between the fifth lens and the sixth lens along the optical axis, r6max is the maximum value of the curvature radius of the first side surface and the second side surface of the sixth lens; r6min is the minimum value of the curvature radius of the first side surface and the second side surface of the sixth lens, and the above meanings will not be repeated below.

[0031] In an exemplary embodiment, the optical lens may satisfy: 0.6≤F / ENPD≤1.3. By making the optical lens satisfy the above conditional formula, a small FNO can be achieved and the amount of light entering can be increased. Preferably, the optical lens may further satisfy: 0.7≤F / ENPD≤1.1 to achieve a high luminous flux of the optical lens.

[0032] In an exemplary embodiment, the optical lens may satisfy: 3≤TTL / F≤6. By making the optical lens satisfy the above conditional formula, the length of the optical lens can be effectively limited to achieve miniaturization of the optical lens. Preferably, the optical lens may further satisfy: 3.7≤TTL / F≤5 to achieve miniaturization of the optical lens.

[0033] In an exemplary embodiment, the optical lens may satisfy: 0.15≤TTL / H / FOVx1°≤0.35. By making the optical lens satisfy the above conditional formula, the length of the optical lens can be more effectively limited when the ratio of image height to field of view is constant, compared with the related art, which is conducive to miniaturization of the optical lens. Preferably, the optical lens may further satisfy: 0.2≤TTL / H / FOVx1°≤0.3, so as to achieve miniaturization of the optical lens.

[0034] In an exemplary embodiment, the optical lens may satisfy: 0.04≤BFL / TTL≤0.3. By making the optical lens satisfy the above conditional formula, the back focus of the optical lens can be made short, which is conducive to making the entire optical lens more compact and realizing the miniaturization of the optical lens while ensuring that the optical element has sufficient installation and focusing space. Preferably, the optical lens may further satisfy: 0.06≤BFL / TTL≤0.25, realizing a short back focus of the optical lens.

[0035] In an exemplary embodiment, the optical lens may satisfy: 0.06≤D / H / FOVx1°≤0.15. By making the optical lens satisfy the above conditional formula, the front diameter of the optical lens can be made small, which is conducive to miniaturization of the optical lens. Preferably, the optical lens may further satisfy: 0.08≤D / H / FOVx1°≤0.11, so as to achieve a small diameter of the optical lens.

[0036] In an exemplary embodiment, the optical lens may satisfy: -15≤F1 / F≤-2. In an exemplary embodiment, the first lens may have a negative optical power. By making the optical lens satisfy the above conditional formula, the first lens can receive the field light and diffuse the light to the rear optical system, so that the light can enter the rear optical system well after being diverged by the first lens, and the light flux is increased, while avoiding excessive concentration of negative light focal length, so that the light beam transitions smoothly, which is conducive to improving the resolution. Preferably, the optical lens may further satisfy: -12≤F1 / F≤-2.5, so as to achieve high resolution and / or high light flux of the optical lens.

[0037] In an exemplary embodiment, the optical lens may satisfy: F2 / F≤-1. In an exemplary embodiment, the second lens has a negative optical power, and the first lens has a negative optical power. By making the optical lens satisfy the above conditional formula, the light can be further diffused, which helps to achieve a smooth transition of the light beam and improve the resolution. Preferably, the optical lens may further satisfy: -15≤F2 / F≤-1.2 to achieve a high resolution of the optical lens. In an exemplary embodiment, the value of F2 may tend to infinity, and the second lens with a negative optical power of the present application may be obtained by reasonable design. For example, in multiple embodiments of the present application, the effective focal length F2 of the second lens is more than 100 mm. At this time, the ability of the second lens to diverge light is slightly weaker, and it can mainly play the role of smoothly transitioning light.

[0038] In an exemplary embodiment, the optical lens may satisfy: F3 / F ≥ 1.5. In an exemplary embodiment, the third lens has positive optical power. By making the optical lens satisfy the above conditional formula, the light rays that have diverged through the front optical system can be converged, which is beneficial to the smooth transition of the light rays and the improvement of image quality. Preferably, the optical lens may further satisfy: 2.5 ≤ F3 / F ≤ 12 to achieve high resolution of the optical lens. In an exemplary embodiment, the value of F3 may tend to infinity, and the third lens with positive optical power of the present application may be obtained by reasonable design. For example, in multiple embodiments of the present application, the effective focal length F3 of the third lens exceeds 100 mm. At this time, the ability of the third lens to converge light rays is slightly weaker, and it can mainly play the role of smoothly transitioning light rays. In an exemplary embodiment, the optical lens can simultaneously satisfy the conditional formula 0<(F / F4) / (R9 / TTL)≤1.5 and F3 / F≥1.5. By setting the third lens and the fourth lens as positive focal lenses and reasonably controlling their ranges, collecting the divergent light through the first lens and the second lens and smoothly converging them to the fifth lens, and controlling the radius of curvature of the first side of the fifth lens, the light incident on the optical lens can be made to move smoothly, reduce the sensitivity of the optical lens, reduce the pressure on the subsequent lens resolution, and make the resolution ability of the optical lens better. Preferably, 0.3≤(F / F4) / (R9 / TTL)≤1.3 and / or 2.5≤F3 / F≤12 are further satisfied. It is more conducive to achieving a better resolution ability of the optical lens.

[0039] In an exemplary embodiment, the optical lens may satisfy: 1≤F4 / F≤15. In an exemplary embodiment, the fourth lens has positive focal power. By making the optical lens satisfy the above conditional formula, the fourth lens can converge the front light, which helps to achieve a smooth transition of the light beam and improve the resolution. Preferably, the optical lens may further satisfy: 1.5≤F4 / F≤12 to achieve high resolution of the optical lens. In an exemplary embodiment, satisfying the conditional formulas F3 / F≥1.5 and 1≤F4 / F≤15 at the same time is conducive to reducing the system sensitivity, thereby further improving the imaging quality, and is also conducive to the miniaturization of the rear end. Preferably, further satisfying 2.5≤F3 / F≤12 and / or 1.5≤F4 / F≤12 is more conducive to improving the imaging quality, and is also more conducive to the miniaturization of the rear end.

[0040] In an exemplary embodiment, the optical lens may satisfy: 0.1 ≤ R9 / TTL ≤ 1.8. In an exemplary embodiment, the first side of the fifth lens is a convex surface. By making the optical lens satisfy the above conditional formula and reasonably controlling the magnitude of the curvature radius of the first side of the fifth lens, the light received by the first side of the fifth lens can be deflected inwards, which is beneficial to reducing the rear port diameter. Preferably, the optical lens may further satisfy: 0.25 ≤ R9 / TTL ≤ 1.2, to achieve miniaturization of the optical lens.

[0041] In an exemplary embodiment, the optical lens may satisfy: 0 < R10 / TTL ≤ 2.5. In an exemplary embodiment, the second side of the fifth lens is a concave surface. By making the optical lens satisfy the above conditional formula and reasonably controlling the magnitude of the curvature radius of the second side of the fifth lens, the light is appropriately diverged, which is beneficial to the smooth transition of the light to the rear optical system and improves the resolution. Preferably, the optical lens may further satisfy: 0.1 ≤ R10 / TTL ≤ 1.8, to achieve high resolution of the optical lens. In an exemplary embodiment, simultaneously satisfying the conditional formulas 0.1 ≤ R9 / TTL ≤ 1.8 and 0 < R10 / TTL ≤ 2.5 is more beneficial for the light to smoothly transition to the sixth lens, and thus can reduce the pressure on the sixth lens to correct aberrations, reduce sensitivity and improve the imaging quality. Preferably, further satisfying 0.1 < R10 / TTL < 1.8 and / or 0.25 ≤ R9 / TTL ≤ 1.2 is more beneficial for achieving high imaging quality and miniaturization.

[0042] In an exemplary embodiment, the optical lens may satisfy: |(H / 2 - F θ / 2) / (F θ / 2)| ≤ 0.08. By making the optical lens satisfy the above conditional formula, when the field of view angle is fixed, the difference between the ideal image height and the actual image height of the lens can be small, reducing lens distortion. Preferably, the optical lens may further satisfy: 0.01 ≤ |(H / 2 - F θ / 2) / (F θ / 2)| ≤ 0.05, to achieve small distortion of the optical lens.

[0043] In an exemplary embodiment, the optical lens may satisfy: 2.2 ≤ D / H ≤ 3.5. By making the optical lens satisfy the above conditional formula, under the conditions of a certain imaging surface and image height, the effective front aperture of the lens can be small, which is beneficial to reducing the optical axis spacing between the transmitting and receiving lenses, thereby reducing the volume of the entire module. Preferably, the optical lens may further satisfy: 2.5 ≤ D / H ≤ 3.3, to achieve a small aperture of the optical lens.

[0044] In an exemplary embodiment, the optical lens may satisfy: 0<F1 / F2≤6.5. In an exemplary embodiment, both the first lens and the second lens have negative optical power. By making the optical lens satisfy the above conditional formula and reasonably controlling the ratio between the effective focal lengths of the first lens and the second lens, the first lens and the second lens can receive the field light and diffuse it backward, thereby achieving a smooth transition of the light beam and improving the imaging quality. Preferably, the optical lens may further satisfy: 0.2<F1 / F2≤4.8, thereby achieving high resolution of the optical lens.

[0045] In an exemplary embodiment, the optical lens may satisfy: 0<(F / F4) / (R9 / TTL)≤1.5. In an exemplary embodiment, the fourth lens may converge the light from the front optical system. Specifically, the smaller the effective focal length value of the fourth lens, the stronger the ability to deflect the light, and the higher the receiving capacity requirement for the fifth lens behind the fourth lens. The radius of curvature of the first side of the fifth lens plays a key role in receiving the light passing through the fourth lens. By making the optical lens satisfy the above conditional formula and controlling the radius of curvature of the first side of the fifth lens, it is beneficial to smoothly transition and converge the light and reduce the introduction of aberrations. Preferably, the optical lens may further satisfy: 0.3≤(F / F4) / (R9 / TTL)≤1.3 to achieve high resolution of the optical lens.

[0046] In an exemplary embodiment, the optical lens may satisfy: 0.5≤R10 / R11≤4. In an exemplary embodiment, the first side surface of the sixth lens is a convex surface, and the second side surface of the fifth lens is a concave surface. By making the optical lens satisfy the above conditional formula and reasonably controlling the above curvature radius ratio, the light collected by the large aperture of the fifth lens is appropriately converged, which is conducive to compressing the aperture, and can ensure that the miniaturization of the optical lens can be achieved while allowing the light to smoothly reach the imaging surface, thereby improving the resolution of the optical system. Preferably, the optical lens may further satisfy: 0.8≤R10 / R11≤3.7, so as to achieve a small aperture of the optical lens.

[0047] In an exemplary embodiment, the optical lens may satisfy: 6≤TTL / H≤9.8. By making the optical lens satisfy the above conditional formula, the ratio of the image height to the total length of the optical lens can be reasonably controlled when the maximum image height corresponding to the maximum field angle of the optical lens is constant, which is conducive to improving the imaging quality while reducing the size of the system. Preferably, the optical lens may further satisfy: 6.8≤TTL / H≤9.1, so as to achieve miniaturization of the optical lens.

[0048] In an exemplary embodiment, the optical lens may satisfy: -3.6≤(F1+F2) / (F3+F4)<0. In an exemplary embodiment, the first lens and the second lens both have negative optical power, and the third lens and the fourth lens both have positive optical power. By making the optical lens satisfy the above conditional formula and reasonably controlling the ratio of the effective focal length value of the first lens to the second lens and the effective focal length value of the third lens to the fourth lens, the optical power distribution of the optical lens can be made more uniform, which is conducive to achieving a smooth transition of the light beam and improving the imaging quality. Preferably, the optical lens may further satisfy: -2.7≤(F1+F2) / (F3+F4)≤-0.4, and the ratio of the effective focal length value of the first lens to the second lens and the effective focal length value of the third lens to the fourth lens is controlled to a close level, so as to better achieve the high resolution of the optical lens.

[0049] In an exemplary embodiment, the optical lens may satisfy: -0.3≤(1 / F5+1 / F6) / (1 / F)≤0.7. By making the optical lens satisfy the above conditional formula, adjusting the ratio of the combined focal length of the rear lens group composed of the fifth lens and the sixth lens to the total effective focal length, the residual aberration of the front lens group (the first lens, the second lens, the third lens and the fourth lens) system can be effectively supplemented, which helps to improve the imaging quality of the entire optical system. Preferably, the optical lens may further satisfy: -0.18≤(1 / F5+1 / F6) / (1 / F)≤0.57, so as to achieve high resolution of the optical lens.

[0050] In an exemplary embodiment, the optical lens may satisfy: T56 / TTL≤0.1. By making the optical lens satisfy the above conditional formula, the spacing distance (e.g., air spacing) between the fifth lens and the sixth lens along the optical axis is made smaller, which helps to reduce the size of the overall optical system while ensuring the imaging quality. Preferably, the optical lens may further satisfy: 0.01<T56 / TTL≤0.08, so as to achieve miniaturization of the optical lens. In an exemplary embodiment, the conditional formula 0<R10 / TTL≤2.5 and T56 / TTL≤0.1 are satisfied at the same time, the radius of curvature of the second side surface of the fifth lens is reasonably controlled, and the spacing distance between the fifth lens and the sixth lens along the optical axis is controlled to be smaller, which is more conducive to ensuring that the light converges smoothly to the imaging surface and achieving miniaturization. Preferably, 0.1≤R10 / TTL≤1.8 and / or 0.01<T56 / TTL≤0.08 are further satisfied, which is more conducive to ensuring that the light converges smoothly to the imaging surface and achieving miniaturization.

[0051] In an exemplary embodiment, the optical lens may satisfy: 0≤(r6max-r6min) / F≤5. In an exemplary embodiment, the sixth lens may be a lens with a convex first side surface and an overall meniscus shape. In cooperation with the fifth lens, the final trend of the front light beam may be eased and aberrations may be corrected, thereby ultimately achieving high resolution of the system. By making the optical lens satisfy the above conditional formula, the radius of curvature of the first side surface and the second side surface of the sixth lens are relatively close, and the sixth lens is set to a structure of approximately concentric circles, which is more conducive to making the light converge smoothly to the imaging surface, reducing sensitivity, and better correcting aberrations and improving imaging quality. Preferably, the optical lens may further satisfy: 0≤(r6max-r6min) / F≤2.5, to achieve low sensitivity of the optical lens. More preferably, the optical lens may further satisfy: 0≤(r6max-r6min) / F≤1.5, to further achieve low sensitivity of the optical lens. Exemplarily, when the sixth lens is a convex-concave aspherical lens, the radius of curvature of the lens changes trendwise from the center to the edge, which can control the light trend of the edge field of view, balance the aberrations of the lenses in each field of view, and improve the imaging quality.

[0052] In an exemplary embodiment, the optical lens can simultaneously satisfy the conditions 0<(F / F4) / (R9 / TTL)≤1.5, 0≤R10 / TTL≤2.5 and 0≤(r6max-r6min) / F≤5 to better achieve a smooth transition and convergence of light, reduce the introduction of aberrations, and improve the resolution, so that the optical lens can achieve at least one of the beneficial effects of high resolution, small FNO and low sensitivity.

[0053] In an exemplary embodiment, the optical lens may satisfy: -2.5≤R3 / F≤-0.5. By making the optical lens satisfy the above conditional formula, the radius of curvature of the first side of the second lens is controlled to be relatively small, so that the second lens can more smoothly receive the divergent light passing through the first lens, and make the light continue to diverge smoothly, which is conducive to achieving a small FNO and high imaging quality. Preferably, the optical lens may further satisfy: -2≤R3 / F≤-0.7 to achieve a small FNO of the optical lens. In particular, in combination with the first lens with negative optical focal length and concave-convex shape, the surface curvature direction is consistent, which is more conducive to smoothly diffusing the incident light to the rear, ensuring a high amount of light and a better imaging effect. In an exemplary embodiment, the conditional formulas 0<R10 / TTL≤2.5 and -2.5≤R3 / F≤-0.5 are satisfied at the same time, and the first side of the second lens is symmetrical with the second side of the fifth lens, which is conducive to correcting aberrations and improving imaging quality. Preferably, further satisfying 0.1≤R10 / TTL≤1.8 and / or -2≤R3 / F≤-0.7 is more conducive to correcting aberrations and improving imaging quality.

[0054] In an exemplary embodiment, the optical lens may satisfy: 1.7≤F / H≤2. By making the optical lens satisfy the above conditional formula, the total effective focal length of the optical lens and the image height corresponding to the maximum field angle are controlled within the above range, which helps the optical lens to have a large image surface and telephoto characteristics, and is conducive to improving the resolution of the optical lens. Preferably, the optical lens may further satisfy: 1.8≤F / H≤1.9, so as to achieve a high luminous flux of the optical lens.

[0055] In an exemplary embodiment, at least one of the first to sixth lenses may be a spherical lens or an aspherical lens. In an exemplary embodiment, the fifth lens and / or the sixth lens may be an aspherical lens. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased, or even all lenses use aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The setting of an aspherical lens helps to correct system aberrations and improve resolution.

[0056] In an exemplary embodiment, the first lens to the sixth lens may be a glass lens or a plastic lens. The present application does not specifically limit the specific number of glass lenses and plastic lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid the problems of lens imaging blur caused by high and low temperature changes in the use environment and affecting the normal use of the lens. Specifically, when focusing on temperature performance and resolution quality, the first lens to the sixth lens can all be glass aspherical lenses. In applications where temperature stability requirements are low, the first lens to the sixth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the sixth lens in the optical lens can also be made of plastic and glass. In an exemplary embodiment, the first side of the sixth lens can have a recurve, which is conducive to better correcting the aberration of the light emitted from different fields of view. According to the above-mentioned embodiment of the present application, the optical lens has at least one beneficial effect of high luminous flux, miniaturization, short back focus, small aperture, high resolution, small distortion, low sensitivity, etc. through the reasonable setting of parameters such as the shape and focal length of each lens.

[0057] Those skilled in the art should understand that the total optical length TTL of the optical lens used above refers to the on-axis distance from the first side of the first lens to the imaging surface or the image source surface; the back focal length BFL of the optical lens refers to the on-axis distance from the second side of the fifth lens to the imaging surface or the image source surface; the maximum field of view FOV of the optical lens is associated with the image height H, which refers to the corresponding field of view angle under the image height H. However, those skilled in the art should understand that the number of lenses constituting the lens can be changed without departing from the technical solution claimed in the present application 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. The following further describes a specific embodiment of the optical lens applicable to the above-mentioned embodiment with reference to the accompanying drawings.

[0058] Example 1

[0059] The following reference Figure 1 An optical lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0060] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis.

[0061] The first lens L1 has negative refractive power, a first side surface S1 of the first lens L1 is a concave surface, and a second side surface S2 of the first lens L1 is a convex surface.

[0062] The second lens L2 has negative refractive power, and its first side surface S3 is a concave surface, and its second side surface S4 is a concave surface.

[0063] The third lens L3 has positive refractive power, and its first side surface S5 is a convex surface, and its second side surface S6 is a convex surface.

[0064] The fourth lens L4 has positive refractive power, and its first side surface S7 is convex, and its second side surface S8 is concave.

[0065] The fifth lens L5 has negative refractive power, and its first side surface S10 is convex, and its second side surface S11 is concave.

[0066] The sixth lens L6 has positive refractive power, and its first side surface S12 is convex, and its second side surface S13 is concave.

[0067] The optical lens may further include a stop STO, and the stop STO may be disposed between the fourth lens L4 and the fifth lens L5.

[0068] Optionally, the optical lens may further include a filter having a first side surface S14 and a second side surface S15, and a protective glass having a first side surface S16 and a second side surface S17.

[0069] The optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a laser radar receiving end lens. In this case, Figure 1 IMA represents the imaging surface, and the light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface IMA disposed on the second side, wherein an image sensor chip is disposed on the imaging surface. It should be understood that the optical lens provided in the present application can also be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, Figure 1 IMA represents the light source surface, and the light from the light source surface sequentially passes through each surface S17 to S1 and is finally projected to the first side, and forms an image or illuminated area on the first side. Table 1 shows the curvature radius R, thickness / distance, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 1.

[0070] Table 1

[0071]

[0072] In this embodiment, the first side surface S2 and the second side surface S13 of the sixth lens L6 may be aspherical surfaces, and the surface shape of each aspherical lens may be defined by but not limited to the following aspherical surface formula:

[0073] (1)

[0074] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface S4 and S5 in Example 1.

[0075] Table 2

[0076]

[0077] In this embodiment, in terms of MTF, the optical lens has an MTF (Modulation Transfer Function) value of more than 0.51 at a spatial frequency of 25 lp / mm (25 lines / mm), wherein MTF describes the ability of the optical lens to "restore" the object space in the image space, and the abscissa of the MTF graph is the spatial frequency. According to the above values, the optical lens provided in this embodiment has a high resolution capability.

[0078] Example 2

[0079] The following reference Figure 2 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown.

[0080] like Figure 2 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The difference in the surface shape and the positive and negative optical power of the optical lens of Example 2 and Example 1 is that the second side surface S8 of the fourth lens L4 of Example 2 is a convex surface.

[0081] Table 3 shows the parameters of each lens of the optical lens of Example 2. Table 4 shows the parameters of the aspheric lens that can be used in Example 2, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0082] Table 3

[0083]

[0084] Table 4

[0085]

[0086] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.63. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0087] Example 3

[0088] The following reference Figure 3 The optical lens according to Embodiment 3 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0089] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis. The surface shapes and optical powers of the optical lenses of Example 3 and Example 2 are the same.

[0090] Table 5 shows the parameters of each lens of the optical lens of Example 3. Table 6 shows the parameters of the aspheric lens that can be used in Example 3, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0091] Table 5

[0092]

[0093] Table 6

[0094]

[0095] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.65. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0096] Example 4

[0097] The following reference Figure 4 The optical lens according to Embodiment 4 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0098] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The difference in the surface shape and the positive and negative optical power of the optical lens of Example 4 and Example 1 is that the second side surface S4 of the second lens L2 of Example 4 is a convex surface.

[0099] Table 7 shows the parameters of each lens of the optical lens of Example 4. Table 8 shows the parameters of the aspheric lens that can be used in Example 4, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0100] Table 7

[0101]

[0102] Table 8

[0103]

[0104] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.68. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0105] Example 5

[0106] The following reference Figure 5 The optical lens according to Embodiment 5 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 5 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0107] like Figure 5 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The difference in the surface shape and the positive and negative optical power of the optical lens of Example 5 and Example 1 is that the second side surface S4 of the second lens L2 of Example 5 is a convex surface, and the second side surface S8 of the fourth lens L4 is a convex surface.

[0108] Table 9 shows the parameters of each lens of the optical lens of Example 5. Table 10 shows the parameters of the aspheric lens that can be used in Example 5, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0109] Table 9

[0110]

[0111] Table 10

[0112]

[0113] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.62. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0114] Example 6

[0115] The following reference Figure 6 The optical lens according to Embodiment 6 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 6 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0116] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis. The surface shapes and positive and negative optical powers of the optical lenses of Example 6 and Example 5 are the same.

[0117] Table 11 shows the parameters of each lens of the optical lens of Example 6. Table 12 shows the parameters of the aspheric lenses that can be used in Example 6, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0118] Table 11

[0119]

[0120] Table 12

[0121]

[0122] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.68. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0123] Example 7

[0124] The following reference Figure 7 An optical lens according to Embodiment 7 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 7 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0125] like Figure 7 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The differences in the surface shapes and positive and negative optical powers of the optical lenses of Example 7 and Example 1 are only that the second side surface S4 of the second lens L2 of Example 7 is a convex surface, the second side surface S8 of the fourth lens L4 is a convex surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0126] Table 13 shows the parameters of each lens of the optical lens of Example 7. Table 14 shows the parameters of the aspheric lenses that can be used in Example 7, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0127] Table 13

[0128]

[0129] Table 14

[0130]

[0131] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.72. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0132] Example 8

[0133] The following reference Figure 8 The optical lens according to Embodiment 8 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 8 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0134] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The differences in the surface shapes and positive and negative optical powers of the optical lenses of Example 8 and Example 1 are that the second side surface S4 of the second lens L2 of Example 8 is a convex surface, the first side surface S7 of the fourth lens L4 is a concave surface, the second side surface S8 is a convex surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0135] Table 15 shows the parameters of each lens of the optical lens of Example 8. Table 16 shows the parameters of the aspheric lenses that can be used in Example 8, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0136] Table 15

[0137]

[0138] Table 16

[0139]

[0140] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.64. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0141] Example 9

[0142] The following reference Fig. 9 The optical lens according to Embodiment 9 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig. 9 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown.

[0143] like Fig. 9As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The differences in the surface shapes and positive and negative optical powers of the optical lenses of Example 9 and Example 1 are only that the second side surface S4 of the second lens L2 of Example 9 is a convex surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0144] Table 17 shows the parameters of each lens of the optical lens of Example 9. Table 18 shows the parameters of the aspheric lenses that can be used in Example 9, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0145] Table 17

[0146]

[0147] Table 18

[0148]

[0149] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.61. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0150] Example 10

[0151] The following reference Fig.10 The optical lens according to Embodiment 10 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.10 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown.

[0152] like Fig.10 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 10 and Example 1 is that the second side surface S4 of the second lens L2 of Example 10 is a convex surface, the first side surface S5 of the third lens L3 is a concave surface, the second side surface S8 of the fourth lens L4 is a convex surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0153] Table 19 shows the parameters of each lens of the optical lens of Example 10. Table 20 shows the parameters of the aspheric lens that can be used in Example 10, wherein each aspheric surface shape can be defined by the formula (1) given in Example 1 above.

[0154] Table 19

[0155]

[0156] Table 20

[0157]

[0158] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.64. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0159] Embodiment 11

[0160] The following reference Fig.11 An optical lens according to Embodiment 11 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.11 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown.

[0161] like Fig.11 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 11 and Example 1 is that the second side surface S4 of the second lens L2 of Example 11 is a convex surface, the first side surface S5 of the third lens L3 is a concave surface, the first side surface S7 of the fourth lens L4 is a concave surface, the second side surface S8 is a convex surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power. Among them, the first side surface S12 of the sixth lens L6 has a reverse curve.

[0162] Table 21 shows the parameters of each lens of the optical lens of Example 11. Table 22 shows the parameters of the aspheric lenses that can be used in Example 11, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0163] Table 21

[0164]

[0165] Table 22

[0166]

[0167] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.45. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0168] Example 12

[0169] The following reference Fig.12 The optical lens according to Embodiment 12 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.12 A schematic structural diagram of an optical lens according to Example 12 of the present application is shown.

[0170] like Fig.12 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 12 and Example 1 is that the second side surface S4 of the second lens L2 of Example 12 is a convex surface, the first side surface S5 of the third lens L3 is a concave surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0171] Table 23 shows the parameters of each lens of the optical lens of Example 12. Table 24 shows the parameters of the aspheric lenses that can be used in Example 12, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0172] Table 23

[0173]

[0174] Table 24

[0175]

[0176] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.64. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0177] Example 13

[0178] The following reference Fig.13 The optical lens according to Embodiment 13 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.13 A schematic structural diagram of an optical lens according to Example 13 of the present application is shown.

[0179] like Fig.13As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 13 and Example 1 is that the second side surface S4 of the second lens L2 of Example 13 is a convex surface, the second side surface S6 of the third lens L3 is a concave surface, the fifth lens L5 has a positive optical power, and the sixth lens L6 has a negative optical power.

[0180] Table 25 shows the parameters of each lens of the optical lens of Example 13. Table 26 shows the parameters of the aspheric lens that can be used in Example 13, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0181] Table 25

[0182]

[0183] Table 26

[0184]

[0185] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.67. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0186] Embodiment 14

[0187] The following reference Fig.14 The optical lens according to Embodiment 14 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.14 A schematic structural diagram of an optical lens according to Example 14 of the present application is shown.

[0188] like Fig.14 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis. The surface shapes and positive and negative optical powers of the optical lenses of Example 14 and Example 13 are the same.

[0189] Table 27 shows the parameters of each lens of the optical lens of Example 14. Table 28 shows the parameters of the aspheric lenses that can be used in Example 14, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0190] Table 27

[0191]

[0192] Table 28

[0193]

[0194] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.64. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0195] Embodiment 15

[0196] The following reference Fig.15 The optical lens according to Embodiment 15 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.15 A schematic structural diagram of an optical lens according to Example 15 of the present application is shown.

[0197] like Fig.15 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis. The surface shapes and positive and negative optical powers of the optical lenses of Example 15 and Example 13 are the same.

[0198] Table 29 shows the parameters of each lens of the optical lens of Example 15. Table 30 shows the parameters of the aspheric lens that can be used in Example 15, wherein each aspheric surface shape can be defined by the formula (1) given in Example 1 above.

[0199] Table 29

[0200]

[0201] Table 30

[0202]

[0203] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.69. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0204] Example 16

[0205] The following reference Fig.16 The optical lens according to Embodiment 16 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.16 A schematic structural diagram of an optical lens according to Example 16 of the present application is shown.

[0206] like Fig.16As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 16 and Example 1 is that the second side surface S4 of the second lens L2 of Example 16 is a convex surface, the second side surface S6 of the third lens L3 is a concave surface, the second side surface S8 of the fourth lens L4 is a convex surface, and the fifth lens L5 has a positive optical power.

[0207] Table 31 shows the parameters of each lens of the optical lens of Example 16. Table 32 shows the parameters of the aspheric lenses that can be used in Example 16, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0208] Table 31

[0209]

[0210] Table 32

[0211]

[0212] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.58. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0213] Embodiment 17

[0214] The following reference Fig.17 The optical lens according to Embodiment 17 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.17 A schematic structural diagram of an optical lens according to Example 17 of the present application is shown.

[0215] like Fig.17 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis. The only difference between the surface shapes and the positive and negative optical powers of the optical lenses of Example 17 and Example 1 is that the fifth lens L5 of Example 17 has positive optical power.

[0216] Table 33 shows the parameters of each lens of the optical lens of Example 17. Table 34 shows the parameters of the aspheric lenses that can be used in Example 17, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0217] Table 33

[0218]

[0219] Table 34

[0220]

[0221] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.58. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0222] Embodiment 18

[0223] The following reference Fig.18 The optical lens according to Embodiment 18 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.18 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown.

[0224] like Fig.18 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The differences in the surface shapes and positive and negative optical powers of the optical lenses of Example 18 and Example 1 are that the second side surface S4 of the second lens L2 of Example 18 is a convex surface, the first side surface S5 of the third lens L3 is a concave surface, and the fifth lens L5 has a positive optical power.

[0225] Table 35 shows the parameters of each lens of the optical lens of Example 18. Table 36 shows the parameters of the aspheric lens that can be used in Example 18, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0226] Table 35

[0227]

[0228] Table 36

[0229]

[0230] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.71. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0231] Embodiment 19

[0232] The following reference Fig.19 The optical lens according to Embodiment 19 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.19A schematic structural diagram of an optical lens according to Example 19 of the present application is shown.

[0233] like Fig.19 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The difference in the surface shape and the positive and negative optical power of the optical lens of Example 19 and Example 1 is that the fifth lens L5 of Example 19 has a positive optical power.

[0234] Table 37 shows the parameters of each lens of the optical lens of Example 19. Table 38 shows the parameters of the aspheric lenses that can be used in Example 19, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0235] Table 37

[0236]

[0237] Table 38

[0238]

[0239] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 50 lp / mm exceeds 0.62. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0240] Embodiment 20

[0241] The following reference Fig. 20 An optical lens according to Embodiment 20 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig. 20 A schematic structural diagram of an optical lens according to Example 20 of the present application is shown.

[0242] like Fig. 20 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The differences in the surface shapes and the positive and negative optical powers of the optical lenses of Example 20 and Example 1 are that the first side surface S1 of the first lens L1 of Example 20 is a convex surface, the second side surface S2 is a concave surface, the second side surface S4 of the second lens L2 is a convex surface, and the fifth lens L5 has a positive optical power.

[0243] Table 39 shows the parameters of each lens of the optical lens of Example 20. Table 40 shows the parameters of the aspheric lenses that can be used in Example 20, wherein the surface shapes of each aspheric surface can be defined by the formula (1) given in Example 1 above.

[0244] Table 39

[0245]

[0246] Table 40

[0247]

[0248] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.37. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0249] Embodiment 21

[0250] The following reference Fig.21 An optical lens according to Embodiment 21 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Fig.21 A schematic structural diagram of an optical lens according to Example 21 of the present application is shown.

[0251] like Fig.21 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in order from the first side to the second side along the optical axis. The difference between the surface shapes and the positive and negative optical power of the optical lens of Example 21 and Example 1 is that the second side surface S4 of the second lens L2 of Example 21 is a convex surface and the sixth lens L6 has a negative optical power.

[0252] Table 41 shows the parameters of each lens of the optical lens of Example 21. Table 42 shows the parameters of the aspheric lens that can be used in Example 21, wherein each aspheric surface shape can be defined by the formula (1) given in the above Example 1.

[0253] Table 41

[0254]

[0255] Table 42

[0256]

[0257] In this embodiment, in terms of MTF, the MTF value of the optical lens at a spatial frequency of 25lp / mm exceeds 0.53. Based on the above values, the optical lens provided by this embodiment has a relatively high resolution.

[0258] In addition, the optical lenses provided in Examples 1 to 21 of the present application can all achieve good imaging quality, and their MTF (modulation transfer function) curve diagrams are relatively close. Figure 22 to Figure 27Only the schematic diagrams of the MTF (modulation transfer function) curves of the optical lenses of Example 3, Example 8, Example 9, Example 10, Example 18 and Example 21 are shown for example, and the schematic diagrams of the MTF (modulation transfer function) curves of the central field light of the optical lenses of other embodiments are no longer shown one by one, and those skilled in the art should also be able to know based on the content disclosed in this application. In this application, the FNO of Examples 1 to 15 is 0.9; the FNO of Example 16 is 0.7; the FNO of Examples 17 to 19 is 0.9; the FNO of Example 20 is 1.1; the FNO of Example 21 is 0.9. According to the above values, the optical lenses of the embodiments of this application can all achieve small FNO.

[0259] In summary, Examples 1 to 21 respectively satisfy the relationships shown in Table 43-1 and Table 43-2. ​​In Table 43-1 and Table 43-2, the units of F, ENPD, TTL, BFL, H, F1~F6, and D are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad).

[0260] Table 43-1

[0261]

[0262] Table 43-2

[0263]

[0264] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0265] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that: The optical lens includes, in sequence from the first side to the second side along the optical axis: The first lens has a negative optical power and is generally in a meniscus shape; a second lens having negative optical power, wherein the first side surface of the second lens is concave; a third lens having positive refractive power; a fourth lens having positive refractive power; 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 number of lenses with optical power in the optical lens is six, and the optical lens satisfies: 0<(F / F4) / (R9 / TTL)≤1.5, 0<R10 / TTL≤2.5, 0.6≤F / ENPD≤1.3, Among them, F is the total effective focal length of the optical lens, F4 is the effective focal length of the fourth lens, 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, TTL is the total optical length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens.

2. The optical lens according to claim 1, characterized in that: The first side surface of the first lens is concave, and the second side surface is convex, or the first side surface is convex, and the second side surface is concave.

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

4. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: 3≤TTL / F≤6, Wherein, F is the total effective focal length of the optical lens, and TTL is the total optical length of the optical lens.

5. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following requirements: 0.15≤TTL / H / FOVx1°≤0.35, 0.06≤D / H / FOVx1°≤0.15, 2.2≤D / H≤3.5, Among them, 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, TTL is the total optical length of the optical lens, and D is the maximum light clearance aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens.

6. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: -15≤F1 / F≤-2, Wherein, F is the total effective focal length of the optical lens, and F1 is the effective focal length of the first lens.

7. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: F3 / F≥1.5, Wherein, F is the total effective focal length of the optical lens, and F3 is the effective focal length of the third lens.

8. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: 0.5≤R10 / R11≤4, Wherein, R11 is the curvature radius of the first side surface of the sixth lens, and R10 is the curvature radius of the second side surface of the fifth lens.

9. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: 6≤TTL / H≤9.8, Wherein, TTL is the total optical length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

10. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: -3.6≤(F1+F2) / (F3+F4)<0, Among them, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

11. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: -0.3≤(1 / F5+1 / F6) / (1 / F)≤0.7, Among them, F is the total effective focal length of the optical lens, F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens.

12. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: T56 / TTL≤0.1, Wherein, T56 is the spacing distance between the fifth lens and the sixth lens along the optical axis, and TTL is the total optical length of the optical lens.

13. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: -2.5≤R3 / F≤-0.5, Wherein, F is the total effective focal length of the optical lens, and R3 is the radius of curvature of the first side surface of the second lens.

14. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: 1.7≤F / H≤2, Wherein, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

15. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: |(H / 2-F θ / 2) / (F θ / 2)|≤0.08, Wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and θ is the radian value corresponding to the maximum field angle of the optical lens.

16. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: 0≤(r6max-r6min) / F≤5, Among them, r6max is the maximum value of the curvature radius of the first side surface and the second side surface of the sixth lens; r6min is the minimum value of the curvature radius of the first side surface and the second side surface of the sixth lens.

17. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following requirements: 0.04≤BFL / TTL≤0.3, 0.1≤R9 / TTL≤1.8, F2 / F≤-1, 1≤F4 / F≤15, 0<F1 / F2≤6.5, Among them, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, BFL is the optical back focus of the optical lens, TTL is the total optical length of the optical lens, R9 is the curvature radius of the first side surface of the fifth lens, and F4 is the effective focal length of the fourth lens.

18. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following requirements: 0.7≤F / ENPD≤1.1,3.7≤TTL / F≤5,0.2≤TTL / H / FOVx1°≤0.3,0.06≤BFL / TTL≤0.25,0.08≤D / H / FOVx1°≤0.11,-12≤F1 / F≤-2.5,-15≤F2 / F≤-1.2,2.5≤F3 / F≤12,1.5≤F4 / F≤12,0.25≤R9 / TTL≤1.2,0.1≤R10 / TTL≤1.8,0.01≤|(H / 2-F θ / 2) / (F θ / 2)|≤0.05,2.5≤D / H≤3.3,0.2<F1 / F2≤4.8,0.3≤(F / F4) / (R9 / TTL)≤1.3,0.8≤R10 / R11≤3.7,6.8≤TTL / H≤9.1,-2.7≤(F1+F2) / (F3+F4)≤-0.4,-0.18≤(1 / F5+1 / F6) / (1 / F)≤0.57,0.01<T56 / TTL≤0.08,-2≤R3 / F≤-0.7,1.8≤F / H≤1.9,0≤(r6max-r6min) / F≤2.5, Wherein, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length 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, and D is the maximum aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens. BFL is the optical back focus of the optical lens, R3 is the curvature radius of the first side surface of the second lens, 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, θ is the radian value corresponding to the maximum field of view angle of the optical lens, R11 is the curvature radius of the first side surface of the sixth lens, T56 is the spacing distance between the fifth lens and the sixth lens along the optical axis, r6max is the maximum value of the curvature radius of the first side surface and the second side surface of the sixth lens, and r6min is the minimum value of the curvature radius of the first side surface and the second side surface of the sixth lens.

19. An electronic device, characterized in that: The optical lens comprises any one of claims 1 to 18, and comprises an imaging element for converting an optical image formed by the optical lens into an electrical signal, or comprises a light source.

Images