Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device, and relates to the field of optical elements. The optical lens comprises, in sequence from a first side to a second side along an optical axis: a first lens with positive refractive power, the first side of which is a convex surface; a second lens with refractive power, the first side of which is a convex surface; a third lens with refractive power; a fourth lens with refractive power opposite to that of the third lens; a fifth lens with positive refractive power, the first side of which is a convex surface; a sixth lens with refractive power, the first side of which is a convex surface; and a seventh lens with refractive power, the first side of which is a convex surface and the second side of which is a concave surface. The number of lenses with refractive power in the optical lens is seven. The optical lens satisfies the conditions of 0.8 <= F1 / F <= 4 and 0.059 <= T45 / F <= 0.299. The optical lens has high resolution, high imaging quality, low sensitivity, and can be miniaturized.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0002] As the core hardware foundation for intelligent driving environment perception and intelligent interactive experience, the performance of automotive optical systems directly determines the overall intelligence level and scenario adaptability of a vehicle. Automotive optical lenses, as core optical components of various automotive optical systems, are the core carriers ensuring imaging accuracy, display quality, and the reliability of the optical system. For example, with the increasing demands for driving experience, the application of Head-Up Display (HUD) systems in vehicles is becoming more widespread, placing increasingly higher demands on the functionality and imaging quality of projection lenses within HUD systems.

[0003] However, existing optical design schemes for automotive optical lenses cannot simultaneously achieve core indicators such as small aberrations, high resolution, miniaturization, and low sensitivity, which severely restricts the large-scale application of automotive optical lenses in vehicles. Summary of the Invention

[0004] This application aims to provide an optical lens and electronic device to solve at least one of the above-mentioned technical problems.

[0005] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having positive optical power, the first side of which is convex; a second lens having optical power, the first side of which is convex; a third lens having optical power; a fourth lens having optical power opposite to that of the third lens; a fifth lens having positive optical power, the first side of which is convex; a sixth lens having optical power, the first side of which is convex; and a seventh lens having optical power, the first side of which is convex and the second side of which is concave; the number of lenses having optical power in the optical lens is seven; the optical lens satisfies: 0.8 ≤ F1 / F ≤ 4 and 0.059 ≤ T45 / F ≤ 0.299; wherein F1 is the focal length of the first lens, F is the total focal length of the optical lens, and T45 is the air gap between the fourth and fifth lenses on the optical axis.

[0006] According to an exemplary embodiment of this application, the optical lens further includes an aperture stop disposed in front of the first lens.

[0007] According to an exemplary embodiment of this application, the second side surface of the first lens is concave; or, the second side surface of the first lens is planar; or, the second side surface of the first lens is convex; the second lens has positive optical power and its second side surface is concave; or, the second lens has positive optical power and its second side surface is convex; or, the second lens has negative optical power and its second side surface is concave; the third lens has negative optical power and its first side surface is concave and its second side surface is concave; or, the third lens has negative optical power and its first side surface is planar and its second side surface is concave; or, the third lens has negative optical power and its first side surface is convex and its second side surface is concave; or, the third lens has positive optical power and its first side surface is convex and its second side surface is convex. The fourth lens has positive optical power, with its first side surface being convex and its second side surface being convex; or, the fourth lens has positive optical power, with its first side surface being convex and its second side surface being concave; or, the fourth lens has negative optical power, with its first side surface being concave and its second side surface being concave; the second side surface of the fifth lens is convex; or, the second side surface of the fifth lens is concave; or, the second side surface of the fifth lens is flat; the sixth lens has positive optical power and its second side surface is concave; or, the sixth lens has positive optical power and its second side surface is flat; or, the sixth lens has positive optical power and its second side surface is convex; or, the sixth lens has negative optical power and its second side surface is concave; the seventh lens has negative optical power; or, the seventh lens has positive optical power.

[0008] According to an exemplary embodiment of this application, the third lens and the fourth lens are glued together as a composite.

[0009] In this application, the letters have the following meanings: FOV is the maximum field of view of the optical lens; H is the image height corresponding to the maximum field of view of the optical lens; TL is the total optical length of the lens group of the optical lens; DMAX is the maximum value of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens; θ is the radian value of the maximum field of view of the optical lens; D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens; BFL is the optical back focal length of the optical lens; STOTTL is the total optical length of the optical lens; ENPD is the entrance pupil diameter of the optical lens; DST is the effective aperture of the aperture stop; F2 is the focal length of the second lens; F3 is the focal length of the third lens; and F4 is the focal length of the fourth lens. The focal lengths of the lenses are as follows: F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F14 is the combined focal length of the first, second, third, and fourth lenses, R1 is the central radius of curvature of the first side of the first lens, R14 is the central radius of curvature of the second side of the seventh lens, R3 is the central radius of curvature of the first side of the second lens, F57 is the combined focal length of the fifth, sixth, and seventh lenses, Fmin is the minimum absolute value of the focal lengths of all lenses in the optical lens, R13 is the central radius of curvature of the first side of the seventh lens, L is the distance from the aperture stop to the first side of the first lens, and F34 is the combined focal length of the third and fourth lenses.

[0010] According to an exemplary embodiment of this application, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy: 1.1≤|F2 / F|≤6.6.

[0011] According to an exemplary embodiment of this application, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy: 0.48≤|F3 / F|≤1.9.

[0012] According to an exemplary embodiment of this application, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy: 0.79≤F5 / F≤6.2.

[0013] According to an exemplary embodiment of this application, the air gap T45 between the fourth and fifth lenses on the optical axis and the total optical length TL of the lens group of the optical lens satisfy: 0.059≤T45 / TL≤0.19.

[0014] According to an exemplary embodiment of this application, the combined focal length F34 of the third lens and the fourth lens satisfies the following condition with respect to the overall focal length F of the optical lens: -6.3≤F34 / F≤-0.83.

[0015] According to an exemplary embodiment of this application, the optical back focal length BFL of the optical lens and the focal length F7 of the seventh lens satisfy: 0.066≤|BFL / F7|≤1.245.

[0016] According to an exemplary embodiment of this application, the air gap T45 between the fourth and fifth lenses on the optical axis and the focal length F5 of the fifth lens satisfy: 0.06≤T45 / F5≤0.18.

[0017] According to an exemplary embodiment of this application, the distance L from the aperture stop to the first side of the first lens and the focal length F1 of the first lens satisfy: 0.14≤L / F1≤1.35.

[0018] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.33≤|F4 / F|≤2, 0.68≤|F6 / F|≤4.5, 0.55≤|F7 / F|≤5.5, 0.2≤|F1 / F2|≤2.1, -1.638≤F3 / F4≤-0.484, 1.78≤|Fmin / H|≤5.7, 0.064≤BFL / F5≤0.776 or 0.188≤|F7 / F5|≤4.1.

[0019] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.89≤F14 / TL≤2.95 or 0.3≤F14 / F57≤4.9.

[0020] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.5≤R1 / F≤2.8, 0.115≤R14 / F≤0.92, 0.074≤|R3 / F2|≤1.886, 0.171≤R13 / F≤0.831, or 0.486≤R13 / R14≤3.219.

[0021] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 50≤(FOV×F) / H / 1°≤61, 1≤TL / F≤1.85, 0.358≤TL / H / FOV×1°≤1.095, 0.139≤D11 / H / FOV×1°≤0.545, 0.027≤D11 / H / F×1mm≤0.09, 1.137≤TL / DMAX≤4.008, 0.155≤(F×θ) / D11 / 1rad≤0.547, 0.034≤F / ENPD / D11×1mm≤0.116, 0.228≤DST / F≤0.66, 4≤F / H≤6.4, 0.108≤BFL / STOTTL≤0.429.

[0022] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 52≤(FOV×F) / H / 1°≤59, 1.133≤TL / F≤1.694, 0.511≤TL / H / FOV×1°≤0.842, 1.624≤TL / DMAX≤3.083, 0.222≤(F×θ) / D11 / 1rad≤0.421, 0.199≤D11 / H / FOV×1°≤0.419, 0.039≤D11 / H / F×1mm≤0. 069, 0.154≤BFL / STOTTL≤0.33, 4.177≤F / H≤6.262, 0.048≤F / ENPD / D11×1mm≤0.089, 0.326≤DST / F≤0.508, 0.836≤ F1 / F≤3.786, 1.324≤|F2 / F|≤6.498, 0.554≤|F3 / F|≤1.761, 0.366≤|F4 / F|≤1.946, 0.832≤F5 / F≤5.978, 0.717≤|F 6 / F|≤4.288, 0.578≤|F7 / F|≤5.245, 0.062≤T45 / TL≤0.171, 0.978≤F14 / TL≤2.808, 0.551≤R1 / F≤2.646, 0.164≤R1 4 / F≤0.708, 0.224≤|F1 / F2|≤1.954, -2.34≤F3 / F4≤-0.372, 0.106≤|R3 / F2|≤1.451, 0.315≤F14 / F57≤4.807, 1.89 5≤|Fmin / H|≤5.5, 0.244≤R13 / F≤0.639, 0.694≤R13 / R14≤2.476, 0.153≤L / F1≤1.266, -6.182≤F34 / F≤-0.874, 0.084≤T45 / F≤0.23, 0.094≤|BFL / F7|≤0.958, 0.031≤T45 / F5≤0.182, 0.091≤BFL / F5≤0.597 or 0.198≤|F7 / F5|≤3.896.

[0023] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 56.463≤(FOV×F) / H / 1°≤57.38, 1.333≤TL / F≤1.473, 0.601≤TL / H / FOV×1°≤0.732, 1.911≤TL / DMAX≤2.681, 0.261≤(F×θ) / D11 / 1rad≤0.366, 0.234≤D11 / H / FOV×1°≤0.364, 0.046≤D11 / H / F× 1mm≤0.06, 0.181≤BFL / STOTTL≤0.287, 4.914≤F / H≤5.445, 0.057≤F / ENPD / D11×1mm≤0.077, 0.383≤DST / F≤0.442, 0.984≤F1 / F≤3.292, 1.558≤|F2 / F|≤5.65, 0.652≤|F3 / F|≤1.531, 0.431≤|F4 / F|≤1.692, 0.979≤F5 / F≤5.198, 0.84 4≤|F6 / F|≤3.729, 0.68≤|F7 / F|≤4.561, 0.073≤T45 / TL≤0.149, 1.151≤F14 / TL≤2.442, 0.648≤R1 / F≤2.301, 0.193 ≤R14 / F≤0.616, 0.264≤|F1 / F2|≤1.699, -2.035≤F3 / F4≤-0.438, 0.125≤|R3 / F2|≤1.262, 0.37≤F14 / F57≤4.18, 2.2 29≤|Fmin / H|≤4.783, 0.287≤R13 / F≤0.556, 0.816≤R13 / R14≤2.153, 0.18≤L / F1≤1.101, -5.376≤F34 / F≤-1.028, 0.099≤T45 / F≤0.2, 0.111≤|BFL / F7|≤0.833, 0.037≤T45 / F5≤0.158, 0.107≤BFL / F5≤0.519 or 0.233≤|F7 / F5|≤3.388.

[0024] The second aspect of this application provides an electronic device comprising an optical lens as described in the exemplary embodiments above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the light source is located on a second side of the optical lens, and the light emitted by the light source is projected onto a first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side of the optical lens.

[0025] The optical lens according to the embodiments of this application employs seven lenses with optical power. The first lens has positive optical power, initially converging the light beam, compressing the beam aperture, controlling the beam height incident on the subsequent lens elements, reducing the aperture of subsequent lenses, and initially correcting spherical aberration and field curvature, laying the foundation for subsequent complex aberration correction. The first lens has a large focal length and low optical power, initially and slightly converging the light, reducing the overall aperture of the rear lens. The first side surface of the first lens is convex, collecting forward light rays and allowing edge light rays to enter the optical lens smoothly, reducing the incident angle of off-axis light rays, and reducing the initial values ​​of higher-order coma and astigmatism. The first side surface of the second lens is convex, reducing the pressure on the light converged by the first lens, making the light convergence less sensitive at each stage.

[0026] The fifth lens has positive optical power, converging diverging light rays from the front to the rear, thus reducing the length of the rear lens and consequently the overall optical length of the lens. The first side of the fifth lens is convex, converging diverging light rays from the front to the rear lens, further reducing the length of the rear lens and thus the overall optical length of the lens.

[0027] The first side of the sixth lens is convex, which receives the light rays emitted from the fifth lens, allowing the light rays to smoothly transition to the seventh lens. This reduces the rear port diameter while maintaining high resolution, which is beneficial for miniaturization.

[0028] The first side of the seventh lens is convex, which converges light rays and allows them to smoothly transition to the image plane behind it. The second side of the seventh lens is concave, which can adjust the angle of the principal ray, so that the principal ray reaches the image plane in a parallel direction, which is beneficial for achieving a small principal ray angle. The seventh lens is a convex-concave lens with a smooth transition of curved surfaces, and the light is deflected softly, which is beneficial for suppressing higher aberrations.

[0029] The focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 0.8≤F1 / F≤4. This ensures that the first lens has moderate converging ability, which can not only receive enough light from the field of view, but also avoids aberration correction burden on the subsequent lens group. While ensuring the field of view, it balances aberrations and ensures resolution.

[0030] The air gap T45 between the fourth and fifth lenses on the optical axis and the focal length F of the entire optical lens group satisfy: 0.059≤T45 / F≤0.299. This satisfies the requirements for miniaturization while facilitating a smooth light transition, reducing the light deflection angle, and achieving low sensitivity. Attached Figure Description

[0031] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Figure 1A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown; Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown; Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown; Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown; Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown; Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown; Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown; Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown; Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown; Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown; Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown; Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown; Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown; Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown; Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown; Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this application is shown; Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 17 of this application is shown; Figure 18 A schematic diagram of the structure of an optical lens according to Embodiment 18 of this application is shown; Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this application is shown; Figure 20A schematic diagram of the structure of an optical lens according to Embodiment 20 of this application is shown; Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 21 of this application is shown; Figure 22 A schematic diagram of the structure of an optical lens according to Embodiment 22 of this application is shown; Figure 23 A schematic diagram of the structure of an optical lens according to Embodiment 23 of this application is shown; Figure 24 A schematic diagram of the structure of an optical lens according to Embodiment 24 of this application is shown; Figure 25 A schematic diagram of the structure of an optical lens according to Embodiment 25 of this application is shown; Figure 26 A schematic diagram of the structure of an optical lens according to Embodiment 26 of this application is shown; Figure 27 A schematic diagram of the structure of an optical lens according to Embodiment 27 of this application is shown; Figure 28 A schematic diagram of the structure of an optical lens according to Embodiment 28 of this application is shown; Figure 29 A schematic diagram of the structure of an optical lens according to Embodiment 29 of this application is shown; Figure 30 A schematic diagram of the structure of an optical lens according to Embodiment 30 of this application is shown; Figure 31 A schematic diagram of the structure of an optical lens according to Embodiment 31 of this application is shown; Figure 32 A schematic diagram of the structure of an optical lens according to Embodiment 32 of this application is shown; Figure 33 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown. Figure 34 The MTF curve of the optical lens according to Embodiment 3 of this application is shown; Figure 35 The MTF curve of the optical lens according to Embodiment 4 of this application is shown; Figure 36 The MTF curve of the optical lens according to Embodiment 5 of this application is shown; Figure 37 The MTF curve of the optical lens according to Embodiment 6 of this application is shown.

[0032] Explanation of reference numerals in the attached figures: First lens L1; Second lens L2; ​​Third lens L3; Fourth lens L4; Fifth lens L5; Sixth lens L6; Seventh lens L7; Aperture stop STO; Prism L8; Protective glass L9; Image plane IMA; The first side surface S1 of the first lens L1, and the second side surface S2 of the first lens L1; The first side surface S3 of the second lens L2, the second side surface S4 of the second lens L2; The first side surface S5 of the third lens L3, the second side surface S6 of the third lens L3; The first side surface S7 of the fourth lens L4, and the second side surface S8 of the fourth lens L4; The first side surface S9 of the fifth lens L5, and the second side surface S10 of the fifth lens L5; The first side surface S11 of the sixth lens L6, and the second side surface S12 of the sixth lens L6; The first side surface S13 of the seventh lens L7, and the second side surface S14 of the seventh lens L7; The first side surface S15 of prism L8, the second side surface S16 of prism L8; The first side of the protective glass L9 is S17, and the second side of the protective glass L9 is S18. Detailed Implementation

[0033] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. It should be noted that in this specification, the terms first, second, third, etc., are used only to distinguish one feature from another and do not indicate any limitation on the features. Therefore, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of this application. In the drawings, for ease of illustration, the thickness, size, and shape of the lenses have been slightly exaggerated. Specifically, the shapes of spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly drawn to scale.

[0034] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. It should also be understood that the terms "comprising," "including," and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the term "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration. Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., terms defined in common dictionaries) should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense, unless expressly so defined herein. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] The features, principles and other aspects of this application are described in detail below.

[0036] An optical lens according to an exemplary embodiment of this application may include, for example, seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0037] In the example, the optical lens can be used as, for example, an imaging 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 is provided with an imaging surface. The imaging lens can be a vehicle-mounted lens, a security monitoring lens, or a radar receiver lens. In the example, the optical lens can be used as, for example, a projection lens or a lidar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is provided with an image source surface. In the example, the optical lens provided in this application can be used as a light receiving lens or a light emitting lens. The light receiving lens is typically used to collect light from the object-side space. The collected light is used to form detection information, including but not limited to imaging, laser point clouds, etc. The light emitting lens is typically used to transmit light from the light emitting unit to the object-side space. According to the function of the light, the light transmitted to the object-side space can be divided into projection light for forming a projected image or detection light for detecting target information, etc. It is understood that when the optical lens provided in this application is used as a light-receiving lens such as a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, the term "first side" as used herein can refer to the object side, and "second side" can refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. A camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein can refer to the object side, and "second side" can refer to the light source side. In some possible implementations, the optical lens provided in this application can also simultaneously perform light-receiving and light-emitting functions. For example, the optical lens provided in this application can be used in a lidar optical lens with a shared light-receiving and receiving path, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application can be used in an optical lens integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0038] In the example, the first lens has positive optical power, initially converging the light beam, compressing the beam aperture, controlling the beam height incident on the subsequent lens group, reducing the aperture of subsequent lenses, and initially correcting spherical aberration and field curvature, laying the foundation for subsequent complex aberration correction. The first lens has a large focal length and low optical power, initially and slightly converging the light, reducing the overall aperture of the rear lens. The first side surface of the first lens is convex, collecting forward light rays and allowing edge light rays to enter the optical lens smoothly, reducing the incident angle of off-axis light rays, and reducing the initial values ​​of higher-order coma and astigmatism. The second side surface of the first lens can be concave, flat, or convex: a concave surface can smoothly transition the transmitted light rays within the first lens to the second lens; a flat surface does not change the angle of the light rays, providing a smooth transition; a convex surface can further converge the light rays within the first lens, reducing the converging pressure on the first side surface of the first lens and decreasing the sensitivity of the first lens.

[0039] In the example, the second lens has positive optical power to further increase positive optical power. Together with the first positive lens, it forms the main converging element in the front group. In conjunction with the third lens, it begins to correct axial chromatic aberration and spherical aberration. The second lens then converges the light, relieving the pressure of the first lens's convergence, further reducing the rear aperture and achieving miniaturization. The first side of the second lens is convex, reducing the pressure on the first lens's light convergence and making the light converge less sensitive through gradual focusing. The second side of the second lens can be concave or convex: a concave surface can counteract the spherical aberration and large chromatic aberration introduced by the first side of the second lens, making the light converge more slowly and smoothly; a convex surface can further reduce the converging pressure of the first side of the second lens, resulting in a smoother overall light distribution from the second lens and reducing its sensitivity.

[0040] In the example, the second lens has negative optical power, which can receive and diverge the light rays from the first lens, preventing the light rays from converging at an excessively large angle and introducing large aberrations. It can also reduce spherical aberration introduced by the first lens and improve resolution. The first side of the second lens is convex, smoothly transitioning the light rays converged by the first lens. The second side of the second lens is concave, which can slowly and smoothly diverge the light beam within the second lens, preventing the light rays from converging and thus canceling out aberrations.

[0041] In the example, the third lens has negative optical power and forms a negative + positive cemented lens with the fourth lens, which is the core chromatic aberration correction unit of the optical lens. The third lens strongly corrects axial and transverse chromatic aberration. The negative optical power of the third lens cancels the spherical aberration generated by the front positive lens, improving edge spherical aberration. It diverges light rays, canceling aberrations. When the second and third lenses are positive and negative lenses, respectively, they cancel the aberrations brought by the first and second lenses, improving the resolution of the optical lens. When the second and third lenses are negative and negative lenses, the third lens shares the pressure of the second lens, relieving light rays and improving aberrations. The first side of the third lens is concave, flat, or convex: the concave surface can initially diverge the light rays that converge from the second lens, which is beneficial for canceling the spherical aberration generated by the front positive lens; the flat surface is beneficial for transmitting light rays more gently and regulating the incident light path; it is cemented with the rear biconvex positive lens to form the core achromatic and aberration correction unit of the optical lens; the convex surface is beneficial for further converging light rays, reducing the pressure on the rear lens elements, avoiding the introduction of larger aberrations, and improving the resolution of the optical lens. The second side of the third lens is concave, which mainly diverges light rays, counteracting the aberrations caused by the first and second lenses and improving resolution. The third lens, in combination with the fourth lens, utilizes the opposite positive and negative dispersion to initially correct axial chromatic aberration, balance the total positive power of the first two positive lenses and the last three positive lenses, and avoid the overall focal length of the optical lens being too short or the curvature being too large.

[0042] In the example, the third lens has positive optical power and forms a positive + negative cemented lens with the fourth lens, which is the core chromatic aberration correction unit of the optical lens. The third lens strongly corrects axial and transverse chromatic aberration. The positive optical power of the third lens can alleviate the pressure on the first and second lenses in converging light and reduce the sensitivity of the third lens. The first side of the third lens is convex, and the second side is also convex: a biconvex positive lens, mainly cemented with the fourth lens, a biconcave negative lens, to form the core achromatic and aberration correction unit of the optical lens. It uses the complementary dispersion characteristics of the positive and negative lenses to correct axial chromatic aberration, transverse chromatic aberration, and spherical aberration, while balancing spherical aberration, coma, and astigmatism. In conjunction with the subsequent positive lens, it achieves stable beam convergence, straightens the optical path, and reduces the aperture of subsequent lenses.

[0043] In the example, the fourth lens has positive optical power and is cemented with the third lens. It receives and smooths the light trajectory, allowing the beam to enter the rear group of positive lenses in a more regular shape, further correcting astigmatism and field curvature, and improving off-axis sharpness. The first four lenses can adjust the angle of the principal rays with greater divergence, reducing their divergence and facilitating a smaller telecentric focus in the rear. The first side of the fourth lens is convex, primarily counteracting the aberrations caused by the first and second lenses, thus improving resolution. The second side of the fourth lens is either convex or concave: the convex surface acts as a transition light source, and its core function is to adjust the principal ray angle, preparing for the telecentric adjustment with the rear group; the fourth lens is a biconvex positive lens, cemented together with the front biconcave negative lens (the third lens), forming the core achromatic and aberration correction unit of the optical lens, using the complementary dispersion characteristics of positive and negative lenses to correct axial chromatic aberration, transverse chromatic aberration, and spherical aberration, while balancing spherical aberration, coma, and astigmatism; the fourth lens works with the rear positive lens to achieve stable beam convergence, straighten the optical path, and reduce the aperture of subsequent lenses; the concave surface can transition light sources, and works with the rear lenses to cancel spherical aberration, field curvature, and other chromatic aberrations, improving resolution.

[0044] In the example, the fourth lens has negative optical power and is cemented with the third lens. It receives and smooths the light path, allowing the beam to enter the rear positive lens group in a more regular shape, further correcting astigmatism and field curvature, and improving off-axis sharpness. The fourth lens bears the negative pressure of the front group, canceling the aberrations caused by the first, second, and third lenses, and improving resolution. When the fourth lens is cemented with the third lens, it can further reduce chromatic aberration of the optical lens. The first side and the second side of the fourth lens are concave. The fourth lens is mainly used in conjunction with the third lens. Light rays converge from the third lens and are further diverged when they enter the concave surface of the first side of the fourth lens, which helps to cancel the spherical aberration produced by the front positive lenses. The concave surface of the second side of the fourth lens can transition light rays and work with the rear lenses to cancel chromatic aberration such as spherical aberration and field curvature, improving resolution. The third and fourth lenses can use the opposite positive and negative dispersion to initially correct axial chromatic aberration, balance the total positive optical power of the first two positive lenses and the last three positive lenses, and avoid the overall focal length of the optical lens being too short or the curvature being too large.

[0045] In the example, the fifth lens has positive optical power, converging diverging light rays from the front to the rear, reducing the length of the rear lens and thus the overall optical length of the lens. The first side of the fifth lens is convex, converging diverging light rays from the front to ensure they reach the rear lens smoothly, reducing the length of the rear lens and further decreasing the overall optical length of the lens. The second side of the fifth lens can be either convex or concave: the convex side can alleviate some of the pressure on the first side, acting as a transition. The fifth lens is a biconvex lens, further converging the beam, straightening the optical path, and reducing the aperture of subsequent lenses. The fifth lens, in conjunction with the rear positive lens, lays the structural foundation for field curvature correction in the rear element. The fifth lens primarily bears the positive optical power of the lens, balances residual spherical aberration, astigmatism, and coma, and works with the rear positive and negative structures to correct field curvature. The concave surface allows light to pass through into the sixth lens, reducing aberrations introduced by the first side of the fifth lens. The concave surface of the second side of the fifth lens and the convex surface of the first side of the fifth lens cancel each other out aberrations, and the light transition is smoother, reducing the angle and lowering sensitivity. The second side plane of the fifth lens adopts a convex surface facing the light and a plane exiting the light. The light is first gently refracted on the convex surface, and the plane is perpendicular to the exiting principal ray, making it less likely to form off-axis stray light.

[0046] In this example, the sixth lens has positive optical power, relieving some of the pressure on the light rays converged by the fifth lens, thus allowing for a smoother transition of the sensitive light rays emitted from the fifth lens and reducing the sensitivity of the optical lens. The first side of the sixth lens is convex, converging the light rays emitted from the fifth lens and enabling a smooth transition of the light rays to the seventh lens. This allows for a reduction in the rear aperture while maintaining high resolution, which is beneficial for miniaturization. The second side of the sixth lens can be concave, planar, or convex: a concave surface can form a soft converging structure, smoothly transition the beam, and reduce the incident angle of off-axis rays; a planar surface is beneficial for smoothing the light transition and reducing sensitivity; the sixth lens being close to the image plane also helps to reduce the chief ray angle (CRA) and achieve high light throughput; a convex image plane ensures sufficient optical power to converge the light from the front end, reduces the aperture of the rear lens, achieves miniaturization, and facilitates assembly; the fifth lens and the rear negative lens form a positive and negative correction combination, becoming a key structure for correcting field curvature; a planar surface is beneficial for smoothing the light transition and reducing sensitivity; the sixth lens being close to the image plane also helps to reduce CRA and achieve high light throughput; a convex surface ensures sufficient optical power to converge the light from the front end, reduces the aperture of the rear lens, achieves miniaturization, and facilitates assembly.

[0047] In this example, the sixth lens has negative optical power. It adjusts the large-converging sensitive light rays emitted from the fifth lens, allowing for a smooth transition and reducing aberrations introduced by the fifth lens, thus improving resolution. This also lays the groundwork for adjusting the CRA (Convergent Radiation Aspect Ratio) of the seventh lens and achieving a smaller CRA. The first side of the sixth lens is convex, and the second side is concave. The convex surface converges the light rays emitted from the fifth lens, allowing the light to smoothly transition to the seventh lens. This maintains high resolution while reducing the rear aperture, which is beneficial for miniaturization. The sixth lens, with its convex-concave structure, forms a smooth converging structure, smoothly transitioning the beam, reducing the incident angle of off-axis rays, and avoiding large-angle bends in the light rays that could introduce significant aberrations.

[0048] In the example, the seventh lens has negative or positive optical power, performing aberration correction and image field flattening, ultimately correcting field curvature and astigmatism to ensure a flat image plane across the entire field of view. It also corrects residual distortion and chromatic aberration, improves edge image quality uniformity, and adjusts the CRA (chromatic aberration response) to ensure the principal ray is incident parallel to the image plane, achieving a small CRA. The first side of the seventh lens is convex, and the second side is concave: the convex surface converges light rays, allowing them to smoothly transition to the rear image plane; the concave surface adjusts the CRA, ensuring the principal ray arrives at the image plane in a parallel direction, which is beneficial for achieving a small CRA. The seventh lens is a convex-concave lens with a smooth transition between curved surfaces, resulting in gentle light deflection and helping to suppress higher-order aberrations. The main function of the seventh lens is to provide negative optical power to the optical lens, balancing the overall optical power distribution, focusing on correcting field curvature, astigmatism, coma, and distortion to achieve a flat image field and low-distortion imaging; simultaneously, the seventh lens corrects chromatic aberration, optimizes the angle of outgoing rays, improves image plane illumination uniformity, and performs final correction of residual aberrations in the optical lens.

[0049] In the example, the optical lens may also include an aperture stop, which may be positioned, for example, in front of the first lens, i.e., in front-mounted aperture stop. In front-mounted aperture stop means that the exit pupil position of the optical lens is the aperture stop position, and its size (pupil diameter) can be flexibly adjusted to ensure that the light rays are properly matched with the optical components in front, such as optical waveguides, resulting in high light utilization. Optical waveguides can be applied to head-up display (HUD) systems. Compared to traditional freeform surface augmented reality head-up display (AR-HUD) systems, the optical waveguide's in-chip optical transmission characteristics significantly reduce the overall size of the HUD, allowing for greater freedom in center console layout. This enables greater virtual image distance and a wider field of view, resulting in better augmented reality (AR) scene fusion. A larger eye box range accommodates different driver seating positions, offering high optical utilization, good display clarity under strong light, minimal obstruction of the road ahead, and some suppression of ghosting. It also reduces the requirements for windshield customization. Miniaturization of the optical engine facilitates power consumption and heat management, demonstrating good potential for platform-based mass production. A front-positioned aperture stop facilitates a smaller telecentric center, improving the coupling efficiency of the optical lens and increasing light throughput. In this application, the front-positioned aperture stop ensures uniform pupil positions for beams in each field of view of the optical lens, symmetrical edge aberrations, and good overall light control.

[0050] In the example, the third and fourth lenses are cemented together, which reduces the air gap between the two lenses, resulting in a more compact optical lens structure. This also reduces tolerance sensitivity issues such as overall eccentricity that occur during lens assembly. Cementing the third and fourth lenses together also reduces light loss caused by inter-lens reflections. The combination of high and low refractive indices of the third and fourth lenses helps to increase the aperture stop diameter and improve light transmission. Cementing the third and fourth lenses together allows for thorough correction of various aberrations in the optical lens; by cementing positive and negative lenses, spherical aberration and chromatic aberration are eliminated, improving image quality.

[0051] In the example, the optical lens may also include an Infrared Cut-off Filter (IR) located between the seventh lens and the image plane to filter light of different wavelengths. The optical lens may also, as needed, include polarizing glass and / or cover glass (CG) between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0052] In the example, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). The imaging element of the projection architecture is a digital micromirror device (DMD), a micro light-emitting diode (Micro LED), a liquid crystal on silicon (LCoS), a micro-electro-mechanical system (MEMS) chip, etc. The imaging chip (DMD, Micro LED array, LCoS, MEMS light modulation chip) generates an image, which is magnified and imaged by the subsequent projection optical lens assembly, and finally a clear image is projected onto the target imaging surface.

[0053] In the example, the optical lens may further include a prism, which can increase the equivalent back intercept using a glass medium. In actual products, this is used for optical path folding to achieve miniaturization (digital light processing projection system), while optimizing the incident angle of light reaching the chip and suppressing stray light at the tail.

[0054] In the example, the focal length F of the entire optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view satisfy the following condition: 50 ≤ (FOV × F) / H / 1° ≤ 61. Preferably, 52 ≤ (FOV × F) / H / 1° ≤ 59. Further, 56.463 ≤ (FOV × F) / H / 1° ≤ 57.38. Controlling the range of this relationship can balance the light distribution of a long focal length with a small FOV, allowing the light to be converged by the optical lens and projected onto the image plane completely and clearly from a distance, thus balancing the integrity of the field of view coverage and the imaging accuracy, and improving the practical performance of the optical lens.

[0055] In the example, the total optical length TL of the lens group and the focal length F of the entire lens group satisfy: 1≤TL / F≤1.85. Preferably, 1.133≤TL / F≤1.694. Further, 1.333≤TL / F≤1.473. TL is the distance from the center of the first side of the first lens to the center of the imaging focal plane of the optical lens. Controlling the range of this relationship can avoid insufficient spacing between the front and rear lens groups and crowded optical paths due to an excessively short TL, allowing sufficient space to adjust the lens positions and prevent aberrations (such as distortion and coma) from being concentrated and difficult to correct; it can also avoid an excessively long TL causing a bulky optical lens, adapting to the miniaturization requirements of wide-angle optical lenses. At the same time, a reasonable TL / F ratio reserves space for the synergistic optical power of the positive and negative lenses, ensuring a smooth transition of light from divergence to convergence in a large field of view, improving the imaging quality of the edge field of view, and facilitating the control of lens thickness and spacing parameters, reducing the difficulty of processing and assembly, and balancing performance and structural compactness.

[0056] In the example, the total optical length TL of the lens group, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: 0.358≤TL / H / FOV×1°≤1.095. Preferably, 0.511≤TL / H / FOV×1°≤0.842. Further, 0.601≤TL / H / FOV×1°≤0.732. Controlling the range of this relationship can effectively limit the length of the optical lens; if TL is too long, it directly increases the volume of the optical lens, which violates the miniaturization requirements of automotive equipment; if TL is too short, it will lead to insufficient lens spacing and cramped optical path connection between lenses, requiring the increase of lens thickness or complex curved surfaces to compensate for aberrations, indirectly increasing the volume.

[0057] In the example, the total optical length TL of the lens group of the optical lens and the maximum value DMAX of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.137≤TL / DMAX≤4.008. Preferably, 1.624≤TL / DMAX≤3.083. Further, 1.911≤TL / DMAX≤2.681. By controlling the range of this relationship, it is ensured that DMAX is sufficient to receive light from a large field of view, while TL is compactly adapted to the vehicle space, ensuring smooth connection of the optical paths of the front and rear lens groups. This achieves a balance between size and performance while ensuring light intake and aberration correction, ultimately achieving the technical effect of large aperture, high light transmission, and high illuminance.

[0058] In the example, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum light-transmitting aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.155≤(F×θ) / D11 / 1rad≤0.547. Preferably, 0.222≤(F×θ) / D11 / 1rad≤0.421. Further, 0.261≤(F×θ) / D11 / 1rad≤0.366. By controlling the range of this relationship, the first lens can fully receive light from the large field of view, while effectively controlling the large aperture of the front end of the optical lens, adapting to the small size requirements of automotive applications, and improving the overall light transmission of the optical lens.

[0059] In the example, the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: 0.139 ≤ D11 / H / FOV × 1° ≤ 0.545. Preferably, 0.199 ≤ D11 / H / FOV × 1° ≤ 0.419. Further, 0.234 ≤ D11 / H / FOV × 1° ≤ 0.364. By controlling the range of this relationship, high beam utilization and structural practicality are balanced while still being able to receive edge angle fields of view, thus improving the imaging stability of the optical lens in different field of view regions under the premise of high light transmission. The lower limit of this relationship ensures that the first side aperture of the first lens is not too small, avoiding the light rays at the edge of the large FOV being blocked due to insufficient diameter (reducing vignetting), ensuring uniform light output in all areas of the image plane, and maintaining consistent image brightness; the upper limit of this relationship limits the excessive increase in the first side aperture of the first lens, preventing the optical lens from exceeding the size limit (adapting to the needs of compact scenarios such as automotive), while reducing the processing difficulty and weight burden caused by the large diameter.

[0060] In the example, the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy: 0.027≤D11 / H / F×1mm≤0.09. Preferably, 0.039≤D11 / H / F×1mm≤0.069. Further, 0.046≤D11 / H / F×1mm≤0.06. By controlling the range of this relationship, both beam utilization and structural practicality are considered under the receiving edge angle field of view, improving the imaging stability of the optical lens in the distant region under the premise of large light transmission, that is, good collimation of the emitted light and high brightness of the projected image, which can improve the user experience. The lower limit of this relationship ensures that the aperture of the first side of the first lens is not too small, preventing light rays at the edge of a large field of view from being blocked due to insufficient diameter (reducing vignetting), ensuring uniform light output across all areas of the image plane, and maintaining consistent image brightness. The upper limit of this relationship restricts the excessive increase in the aperture of the first side of the first lens, preventing the optical lens from exceeding its size limit (suitable for compact scenarios such as automotive applications), while also reducing the manufacturing difficulty and weight burden caused by a large diameter. The projected image has high brightness and good collimation of telephoto rays.

[0061] In the example, the optical back focal length (BFL) and the total optical length (STOTTL) of the optical lens satisfy the following condition: 0.108 ≤ BFL / STOTTL ≤ 0.429. Preferably, 0.154 ≤ BFL / STOTTL ≤ 0.33. Further, 0.181 ≤ BFL / STOTTL ≤ 0.287. BFL is the distance from the center of the second side surface of the seventh lens to the center of the imaging plane. When the optical lens is equipped with an aperture stop, STOTTL is the distance from the aperture stop to the center of the imaging plane. Controlling the range of this relationship avoids both excessively small BFL, which would lead to excessive optical power pressure on the sixth lens and thus cause large off-axis aberrations, and excessively long BFL, which would result in an excessively large overall size of the optical lens and thus a large footprint in the vehicle.

[0062] In the example, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 4 ≤ F / H ≤ 6.4. Preferably, 4.177 ≤ F / H ≤ 6.262. Further, 4.914 ≤ F / H ≤ 5.445. Controlling the range of this relationship can reduce aberrations such as field curvature and astigmatism caused by the mismatch between focal length and image height. Especially at the edge of the field of view, it can make the focusing accuracy of light in different areas of the image plane more uniform, improving the overall image clarity. The lower limit of this relationship ensures that F is not too small, avoiding excessive image stretching caused by a relatively large H, and preventing the target from being distorted on the image plane due to scale. The upper limit of this relationship limits F from increasing excessively, avoiding insufficient field of view coverage caused by a relatively small H, ensuring that light from the edge of a large field of view can be fully mapped onto the image plane, without wasting the effective area of ​​the light source, and ensuring complete imaging of edge details in large field of view scenes.

[0063] In the example, the focal length F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.034 ≤ F / ENPD / D11 × 1mm ≤ 0.116. Preferably, 0.048 ≤ F / ENPD / D11 × 1mm ≤ 0.089. Further, 0.057 ≤ F / ENPD / D11 × 1mm ≤ 0.077. Controlling the range of this relationship avoids insufficient light transmission, ensuring sufficient image brightness in low-light environments, and adapting to the vehicle's need for complex lighting conditions. The lower limit of this relationship avoids F / ENPD being too small (i.e., the relative aperture being too large), preventing a surge in spherical aberration and coma caused by a large aperture, and ensuring image sharpness; the upper limit of this relationship limits F / ENPD to being too large (the relative aperture being too small), preventing excessively low light efficiency and resulting in insufficient image illumination.

[0064] In the example, the effective aperture diameter (DST) of the aperture stop and the total focal length (F) of the optical lens satisfy the following condition: 0.228 ≤ DST / F ≤ 0.66. Preferably, 0.326 ≤ DST / F ≤ 0.508. Further, 0.383 ≤ DST / F ≤ 0.442. Controlling the range of this relationship balances the ratios of light intake, depth of field, and aberrations, ensuring sufficient light transmission from the optical lens while adapting the illumination depth of field to driving scenarios (no blurring in near beams, no divergence in far beams). Simultaneously, it suppresses distortions such as spherical aberration, resulting in sharper light focus, softer light spot edges, and avoidance of glare and blind spots. The upper limit of this relationship prevents the effective aperture of the aperture stop from being too small, leading to insufficient light transmission; the lower limit prevents unclear light focus and excessive aberrations, resulting in insufficient resolution.

[0065] In the example, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 0.8 ≤ F1 / F ≤ 4. Preferably, 0.836 ≤ F1 / F ≤ 3.786. Further, 0.984 ≤ F1 / F ≤ 3.292. Since the incident light from the optical lens suffers from marginal asymmetry that is difficult to control, it is necessary to manage the range of this relationship to ensure that the first lens has a moderate converging ability, which can both fully receive the light from the field of view and avoid placing an aberration correction burden on the subsequent lens group. This balances aberrations and ensures resolution while maintaining the field of view.

[0066] In the example, the focal length F2 of the second lens and the total focal length F of the optical lens group satisfy: 1.1 ≤ |F2 / F| ≤ 6.6. Preferably, 1.324 ≤ |F2 / F| ≤ 6.498. Further, 1.558 ≤ |F2 / F| ≤ 5.65. Controlling the range of this relationship ensures that the optical power of the second lens is moderate, which can smoothly connect the optical paths of the first and third lenses, and can also work with the rear lens group to converge the light from the front lens group, balancing aberration correction. If F2 is small, the converging effect of the second lens is too small, which may lead to the inability to offset the spherical aberration and coma generated by the first lens, increasing the correction burden of the third lens; if F2 is large, its converging ability is too large, resulting in greater aberrations and blurred imaging at the edges of a large field of view.

[0067] In the example, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: 0.48 ≤ |F3 / F| ≤ 1.9. Preferably, 0.554 ≤ |F3 / F| ≤ 1.761. Further, 0.652 ≤ |F3 / F| ≤ 1.531. Controlling the range of this relationship helps to offset the spherical aberration caused by the first and second lenses. The third and fourth lenses form a negative + positive cemented lens, which is the core chromatic aberration correction unit of the optical lens. It strongly corrects axial and transverse chromatic aberration, and its negative optical power offsets the spherical aberration generated by the front positive lens, improving edge spherical aberration. If F3 is too large, the light diverges too much, increasing the correction burden on the rear lens group; if F3 is too small, the chromatic aberration reduction effect of the third and fourth lenses deteriorates, failing to reduce the chromatic aberration of the optical lens.

[0068] In the example, the focal length F4 of the fourth lens and the total focal length F of the optical lens group satisfy: 0.33 ≤ |F4 / F| ≤ 2. Preferably, 0.366 ≤ |F4 / F| ≤ 1.946. Further, 0.431 ≤ |F4 / F| ≤ 1.692. Controlling the range of this relationship ensures that the optical power of the fourth lens is moderate, which can smoothly connect the optical paths of the third and fifth lenses, and can also work with the rear lens group to converge the diverging light from the front lens group, balancing aberration correction. If F4 is too small, the fourth lens will focus the light too strongly, which can easily lead to rapid light convergence, aggravating spherical aberration and coma, and increasing the correction burden on the fifth lens; if F4 is too large, its focusing ability is insufficient, making it difficult to receive the light from the third lens and effectively guide it to the fifth lens, which may lead to optical path divergence and blurred imaging at the edges of a large field of view.

[0069] In the example, the focal length F5 of the fifth lens and the total focal length F of the optical lens group satisfy: 0.79≤F5 / F≤6.2. Preferably, 0.832≤F5 / F≤5.978. Further, 0.979≤F5 / F≤5.198. Controlling the range of this relationship, the fifth lens is a positive lens, forming a continuous positive optical power combination with the front positive lens, further converging the beam, straightening the optical path, and reducing the aperture of subsequent lenses; the fifth lens, in conjunction with the rear positive lens, lays the structural foundation for field curvature correction in the subsequent group. The fifth lens mainly bears part of the positive optical power of the optical lens, balancing residual spherical aberration, astigmatism, and coma, and works with the positive and negative structures of the subsequent lens group to correct field curvature; an excessively large F5 causes the light to converge sharply, increasing aberrations; an excessively small F5 will prevent the smooth reception of light from the front lens, increasing the correction pressure on the rear lens.

[0070] In the example, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.68 ≤ |F6 / F| ≤ 4.5. Preferably, 0.717 ≤ |F6 / F| ≤ 4.288. Further, 0.844 ≤ |F6 / F| ≤ 3.729. Controlling the range of this relationship helps reduce CRA (Cost Aberration). As a lens close to the image plane, the sixth lens directly affects the incident angle of the principal ray, ensuring that the light converges to the image plane at a suitable angle, avoiding vignetting, and ensuring uniform illumination within the field of view. Simultaneously, it can finely correct residual aberrations in the front group (such as distortion and field curvature) and provide final control over the total optical length and back focal length of the optical lens.

[0071] In the example, the focal length F7 of the seventh lens satisfies the following condition with the overall focal length F of the optical lens: 0.55 ≤ |F7 / F| ≤ 5.5. Preferably, 0.578 ≤ |F7 / F| ≤ 5.245. Further, 0.68 ≤ |F7 / F| ≤ 4.561. Controlling the range of this relationship helps reduce aberrations. As the final lens of the rear group, the seventh lens directly affects the final image quality and light convergence. If F7 is too large or too small, it will be difficult to effectively correct the residual aberrations of the front group lenses (such as field curvature and distortion), and may lead to an excessively large principal ray angle. Stabilizing F7 within a reasonable range ensures a smooth transition of light to the image plane, forming a uniform and sharp light spot within the field of view, while also improving the stability of the optical lens.

[0072] In the example, the air gap T45 between the fourth and fifth lenses on the optical axis and the total optical length TL of the lens group satisfy: 0.059 ≤ T45 / TL ≤ 0.19. Preferably, 0.062 ≤ T45 / TL ≤ 0.171. Further, 0.073 ≤ T45 / TL ≤ 0.149. Controlling the range of this relationship is beneficial for a smooth transition of light, reducing the light deflection angle, and achieving low sensitivity.

[0073] In the example, the combined focal length F14 of the first, second, third, and fourth lenses satisfies the following relationship with the total optical length TL of the lens group: 0.89 ≤ F14 / TL ≤ 2.95. Preferably, 0.978 ≤ F14 / TL ≤ 2.808. Further, 1.151 ≤ F14 / TL ≤ 2.442. By controlling the range of this relationship, the combined focal length F14 of the front lens group (first, second, third, and fourth lenses) is close to the center distance from the first side of the first lens to the imaging focal plane, which is beneficial for smooth light path, reducing CRA (Collateral Radiation Amplitude), and allowing the light to transition smoothly to the image plane, thus achieving low telecentricity.

[0074] In the example, the central radius of curvature R1 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.5 ≤ R1 / F ≤ 2.8. Preferably, 0.551 ≤ R1 / F ≤ 2.646. Further, 0.648 ≤ R1 / F ≤ 2.301. Controlling the range of this relationship is beneficial for controlling aberrations at the source and for collecting light to achieve high luminous flux. The first lens determines the refraction angle of the incident light. If the value of R1 / F is inappropriate (too small, R1 is small, and aberrations increase sharply; too large, F is insufficient, and luminous flux is insufficient), excessive spherical aberration and coma will be generated, placing a heavy correction burden on subsequent lenses.

[0075] In the example, the central radius of curvature R14 of the second side of the seventh lens and the focal length F of the entire optical lens satisfy the following condition: 0.115 ≤ R14 / F ≤ 0.92. Preferably, 0.164 ≤ R14 / F ≤ 0.708. Further, 0.193 ≤ R14 / F ≤ 0.616. Controlling the range of this relationship is beneficial for controlling the angle of light incident on the chip and for collecting light, thus achieving high luminous flux. The seventh lens determines the deflection angle of the outgoing light. If the value of R14 / F is inappropriate (too small, R14 is small, and the light deflection is large; too large, F is insufficient, and the luminous flux is insufficient), excessive spherical aberration and coma will be generated, resulting in a deterioration of the overall optical lens resolution.

[0076] In the example, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy: 0.2 ≤ |F1 / F2| ≤ 2.1. Preferably, 0.224 ≤ |F1 / F2| ≤ 1.954. Further, 0.264 ≤ |F1 / F2| ≤ 1.699. Controlling the range of this relationship is beneficial for the smooth entry of front-end light into the optical lens, better correction of aberrations, obtaining a flatter and clearer image, controlling the overall optical length of the optical lens, and improving image quality.

[0077] In the example, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy: -1.638 ≤ F3 / F4 ≤ -0.484. Preferably, -2.34 ≤ F3 / F4 ≤ -0.372. Further, -2.035 ≤ F3 / F4 ≤ -0.438. Controlling the range of this relationship helps to ensure the achromatic effect. The cemented joint of the third and fourth lenses essentially uses the dispersion cancellation of the positive and negative lenses to eliminate chromatic aberration.

[0078] In the example, the central radius of curvature R3 of the first side of the second lens and the focal length F2 of the second lens satisfy: 0.074 ≤ |R3 / F2| ≤ 1.886. Preferably, 0.106 ≤ |R3 / F2| ≤ 1.451. Further, 0.125 ≤ |R3 / F2| ≤ 1.262. Controlling the range of this relationship controls the deflection angle of the incident light. If the value of |R3 / F2| is inappropriate (too small and R3 is small, too large and F2 is too small), excessive spherical aberration and coma will be generated, placing a heavy correction burden on subsequent lenses.

[0079] In the example, the combined focal length F14 of the first, second, third, and fourth lenses and the combined focal length F57 of the fifth, sixth, and seventh lenses satisfy: 0.3 ≤ F14 / F57 ≤ 4.9. Preferably, 0.315 ≤ F14 / F57 ≤ 4.807. Further, 0.37 ≤ F14 / F57 ≤ 4.18. Controlling the range of this relationship ensures that the outgoing rays from the front group lenses (first, second, third, and fourth lenses) and the rays from the rear group lenses (fifth, sixth, and seventh lenses) exhibit a gentle trend, which is beneficial for extending the optical back focal length. If F14 / F57 is too large, the aberration correction capability of the front group lenses is insufficient, which is detrimental to high resolution; if F14 / F57 is too small, the front group lenses will introduce new aberrations, which is also detrimental to high resolution.

[0080] In the example, the minimum absolute value of the focal length of each lens in the optical lens, Fmin, satisfies the following relationship with the image height H corresponding to the maximum field of view of the optical lens: 1.78 ≤ |Fmin / H| ≤ 5.7. Preferably, 1.895 ≤ |Fmin / H| ≤ 5.5. Further, 2.229 ≤ |Fmin / H| ≤ 4.783. By controlling the range of this relationship, a larger minimum focal length value in the optical lens results in a smoother overall light processing, which is beneficial for increasing the overall focal length of the entire optical lens group, thereby improving the light transmission.

[0081] In the example, the central radius of curvature R13 of the first side of the seventh lens and the focal length F of the entire optical lens satisfy the following condition: 0.171 ≤ R13 / F ≤ 0.831. Preferably, 0.244 ≤ R13 / F ≤ 0.639. Further, 0.287 ≤ R13 / F ≤ 0.556. Controlling the range of this relationship is beneficial for controlling the angle of light incident on the chip and for collecting light, thus achieving high luminous flux. The seventh lens determines the deflection angle of the outgoing light. If the value of R13 / F is inappropriate (too small, R13 is small, and the light deflection is large; too large, F is insufficient, and the luminous flux is insufficient), excessive spherical aberration and coma will be generated, resulting in a deterioration of the overall optical lens resolution.

[0082] In the example, the central radius of curvature R13 of the first side of the seventh lens and the central radius of curvature R14 of the second side of the seventh lens satisfy: 0.486 ≤ R13 / R14 ≤ 3.219. Preferably, 0.694 ≤ R13 / R14 ≤ 2.476. Further, 0.816 ≤ R13 / R14 ≤ 2.153. By controlling the range of this relationship, the degree of CRA offset of the seventh lens can be controlled, so that the principal ray arrives at the image plane in a parallel trend, which is beneficial to achieving a small CRA.

[0083] In the example, the distance L from the aperture stop to the first side of the first lens and the focal length F1 of the first lens satisfy the following condition: 0.14 ≤ L / F1 ≤ 1.35. Preferably, 0.153 ≤ L / F1 ≤ 1.266. Further, 0.18 ≤ L / F1 ≤ 1.101. By controlling the range of this relationship, placing the aperture stop in front of the first lens can increase the amount of light transmitted and is beneficial to the coupling between the optical lens and the front device. In particular, when the aperture stop is close to the first lens, it is beneficial to achieve miniaturization.

[0084] In the example, the combined focal length F34 of the third and fourth lenses satisfies the following condition with the overall focal length F of the optical lens: -6.3 ≤ F34 / F ≤ -0.83. Preferably, -6.182 ≤ F34 / F ≤ -0.874. Further, -5.376 ≤ F34 / F ≤ -1.028. By controlling the range of this relationship, F34 is negative, balancing the aberrations introduced by the first and second lenses and improving resolution.

[0085] In the example, the air gap T45 between the fourth and fifth lenses on the optical axis and the focal length F of the entire optical lens group satisfy: 0.059 ≤ T45 / F ≤ 0.299. Preferably, 0.084 ≤ T45 / F ≤ 0.23. Further, 0.099 ≤ T45 / F ≤ 0.2. Controlling the range of this relationship satisfies miniaturization while facilitating a smooth light transition, reducing the light deflection angle, and achieving low sensitivity.

[0086] In the example, the optical rear focal length (BFL) of the optical lens and the focal length (F7) of the seventh lens satisfy the following condition: 0.066 ≤ |BFL / F7| ≤ 1.245. Preferably, 0.094 ≤ |BFL / F7| ≤ 0.958. Further, 0.111 ≤ |BFL / F7| ≤ 0.833. Controlling the range of this relationship helps reduce aberrations. As the final lens of the rear group, the seventh lens directly affects the final image quality and light convergence. If F7 is too large or too small, it will be difficult to effectively correct the residual aberrations (such as field curvature and distortion) of the front group lenses, and may lead to excessive CRA. Stabilizing F7 within a reasonable range ensures that light smoothly transitions to the image plane, forming a uniform and sharp light spot within the field of view, while improving the stability of the optical lens.

[0087] In the example, the air gap T45 between the fourth and fifth lenses on the optical axis and the focal length F5 of the fifth lens satisfy the following condition: 0.06 ≤ T45 / F5 ≤ 0.18. Preferably, 0.031 ≤ T45 / F5 ≤ 0.182. Further, 0.037 ≤ T45 / F5 ≤ 0.158. Controlling the range of this relationship is beneficial for a smooth transition of light, reducing the light deflection angle, and achieving low sensitivity.

[0088] In the example, the optical rear focal length (BFL) of the optical lens and the focal length (F5) of the fifth lens satisfy the following condition: 0.064 ≤ BFL / F5 ≤ 0.776. Preferably, 0.091 ≤ BFL / F5 ≤ 0.597. Further, 0.107 ≤ BFL / F5 ≤ 0.519. Controlling the range of this relationship helps reduce aberrations. As the rear lens group, the fifth lens directly affects the final image quality and light convergence. If F5 is too large or too small, it will be difficult to effectively correct the residual aberrations of the front group (such as field curvature and distortion), and may lead to excessive CRA. Stabilizing F5 within a reasonable range ensures that light smoothly transitions to the image plane, forming a uniform and sharp spot within the field of view, while improving the stability of the optical lens.

[0089] In the example, the focal length F7 of the seventh lens and the focal length F5 of the fifth lens satisfy: 0.188 ≤ |F7 / F5| ≤ 4.1. Preferably, 0.198 ≤ |F7 / F5| ≤ 3.896. Further, 0.233 ≤ |F7 / F5| ≤ 3.388. By controlling the range of this relationship, F5 bears most of the positive optical power in the latter part, determining the basic convergence capability; when F7 is negative, it is used to counteract excessive convergence. When |F7 / F5| is too large, the beam converges excessively, the optical back focal length is shortened, and the chip assembly space is insufficient. When |F7 / F5| is too small, the optical back focal length is lengthened, the total optical length of the optical lens increases, and the volume increases. At the same time, reasonably controlling |F7 / F5| is beneficial for positive and negative optical power compensation, balancing aberrations, and improving resolution.

[0090] In the example, the optical lens satisfies the following conditions: 0.8 ≤ F1 / F ≤ 4 and 0.059 ≤ T45 / F ≤ 0.299. The F1 / F ratio at the front constrains the convergence of the first lens, appropriately reducing the angle of incidence. In the middle, a controlled T45 air gap redistributes the beam height, allowing the subsequent positive and negative lenses to compensate for chromatic aberration and monochromatic aberration. This division of labor between the front and rear lenses, rather than a single lens bearing the entire burden of optical power and aberration correction, is crucial. Simply controlling the optical power ratio can lead to a shortened overall length but an explosion of higher-order aberrations; optimizing only the middle air gap can result in insufficient light collection at the front. By managing these two relationships, the lens length is compressed by the appropriate positive optical power of the first lens, while the middle air gap provides aberration correction freedom, achieving a good balance of aberrations (simultaneous suppression of spherical aberration, chromatic aberration, distortion, and astigmatism) within a compact overall optical length.

[0091] In the example, the optical lens satisfies the following conditions: 0.8≤F1 / F≤4, 0.059≤T45 / F≤0.299, and 1.1≤|F2 / F|≤6.6. By limiting the relative focal lengths of the first and second lenses, the optical power of the front group is distributed in a two-stage gradient, smoothly converging the incident beam and suppressing excessive high-order monochromatic aberrations at the front end. Furthermore, by adjusting the light height of the intermediate optical path with T45, the beam shaping of the front group and the aberration correction of the intermediate group are linked, comprehensively balancing spherical aberration, chromatic aberration, distortion, and astigmatism.

[0092] In the example, the optical lens satisfies the following conditions: 0.8 ≤ F1 / F ≤ 4, 0.059 ≤ T45 / F ≤ 0.299, and 0.48 ≤ |F3 / F| ≤ 1.9. F1 / F controls the converging power of the first lens, T45 / F regulates the height of the light rays in the intermediate optical path, and |F3 / F| limits the optical power of the third negative lens. These three elements work together to progressively converge the beam in the front group, utilize the third lens to handle chromatic aberration and astigmatism correction, and further optimize the light distribution using the intermediate air gap. This effectively distributes the aberration correction pressure among the different groups, preventing localized aberration accumulation. It comprehensively balances spherical aberration, chromatic aberration, and off-axis aberrations, while simultaneously reducing lens curvature and assembly tolerance sensitivity, thereby improving image quality and mass production yield.

[0093] In the example, the optical lens satisfies the following conditions: 0.8≤F1 / F≤4, 0.059≤T45 / F≤0.299, and 0.79≤F5 / F≤6.2. F1 / F controls the beam convergence intensity at the front end, F5 / F appropriately limits the converging capability of the fifth lens, and T45 / F adjusts the light height of the intermediate air gap. The front-group shaping, intermediate optical path adjustment, and rear-stage convergence work together to evenly distribute the optical power along the optical path, suppressing higher-order spherical aberrations, balancing various aberrations, improving image quality, and reducing processing and assembly sensitivity.

[0094] In the example, the optical lens satisfies the following conditions: 0.8 ≤ F1 / F ≤ 4, 0.059 ≤ T45 / F ≤ 0.299, and -6.3 ≤ F34 / F ≤ -0.83. F1 / F controls the convergence of the front-end beam, F34 / F determines the divergence capability of the middle negative group, and T45 / F adjusts the light height between the third and fourth lenses and between the fourth and fifth lenses. The front group converges the light, the middle negative group moderately diverges and shapes the light, the intermediate air gap optimizes the optical path shape, and the lenses work together to correct chromatic aberration and advanced monochromatic aberration, balancing the correction load of each group, improving image quality within a compact size, and reducing assembly tolerance sensitivity.

[0095] In the example, the optical lens satisfies the following conditions: 0.8 ≤ F1 / F ≤ 4, 0.059 ≤ T45 / F ≤ 0.299, and 0.066 ≤ |BFL / F7| ≤ 1.245. F1 / F controls the front-end beam convergence, T45 / F optimizes the ray height in the intermediate optical path, and |BFL / F7| constrains the matching relationship between the rear optical focal length and the seventh lens's power. Front-group shaping, intermediate aberration compensation, and rear-end optical path convergence work together to balance residual aberrations across the entire optical path, reserve sufficient back working distance, and simultaneously control the overall length of the optical lens, improving image quality and assembly space.

[0096] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical parameters of each lens, the optical lens achieves small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, low distortion, small principal angle, high illumination, and good manufacturability. It can also be well-matched to, for example, automotive chips without producing vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of, for example, automotive applications.

[0097] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0098] Example 1 The following is for reference Figure 1 Describes an optical lens according to Embodiment 1 of this application. For example... Figure 1 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned in front of the first lens L1. The third lens L3 and the fourth lens L4 are cemented together as a single unit.

[0099] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is flat.

[0100] The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave.

[0101] The third lens L3 has negative optical power, and its first side surface S5 is concave, and its second side surface S6 is concave.

[0102] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0103] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0104] The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0105] The seventh lens L7 has negative optical power, and its first side surface S13 is convex and its second side surface S14 is concave.

[0106] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A prism L8 and a protective glass L9 are disposed between the seventh lens L7 and the image plane IMA. The prism L8 has a first side surface S15 and a second side surface S16. The protective glass L9 has a first side surface S17 and a second side surface S18. Table 1 shows the basic parameters of the optical lens of Embodiment 1.

[0107] Table 1. Basic parameters of the optical lens in Example 1

[0108] from Figure 33 As can be seen, the optical lens of Example 1 can achieve a full-field MTF value of over 0.59 at a spatial frequency of 65 lp / mm. Figure 33 In this configuration, the meridional curve and the sagittal curve at a height of 0.0000 mm coincide. Therefore, the optical lens provided in Example 1 has good imaging quality.

[0109] Example 2 The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 2 shows the basic parameters of the optical lens of Embodiment 2.

[0110] Table 2 Basic parameters of the optical lens in Example 2

[0111] The optical lens of Example 2 achieves a full-field MTF value of 0.59 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 2 has the same or nearly the same effects as other examples.

[0112] Example 3 The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is a convex surface. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0113] Table 3. Basic parameters of the optical lens in Example 3

[0114] from Figure 34 As can be seen, the optical lens of Example 3 can achieve a full-field MTF value of over 0.6 at a spatial frequency of 65 lp / mm. Figure 34 In this case, the meridional curve and the sagittal curve with a height of 0.0000 mm coincide. Therefore, Example 3 has the same or nearly the same effects as other examples.

[0115] Example 4 The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is a convex surface. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0116] Table 4. Basic parameters of the optical lens in Example 4

[0117] from Figure 35 As can be seen, the optical lens of Example 4 can achieve a full-field MTF value of over 0.6 at a spatial frequency of 65 lp / mm. Figure 35 In this case, the meridional curve and the sagittal curve with a height of 0.0000 mm coincide. Therefore, Example 4 has the same or nearly the same effects as other examples.

[0118] Example 5 The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0119] Table 5. Basic parameters of the optical lens in Example 5

[0120] from Figure 36 As can be seen, the optical lens of Example 5 can achieve a full-field MTF value of over 0.73 at a spatial frequency of 65 lp / mm. Figure 36 In this case, the meridional curve and the sagittal curve with a height of 0.0000 mm coincide. Therefore, Example 5 has the same or nearly the same effects as other examples.

[0121] Example 6 The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave. Table 6 shows the basic parameters of the optical lens of Embodiment 6.

[0122] Table 6 Basic parameters of the optical lens in Example 6

[0123] from Figure 37 As can be seen, the optical lens of Example 6 can achieve a full-field MTF value of over 0.6 at a spatial frequency of 65 lp / mm. Figure 37 In this case, the meridional curve and the sagittal curve with a height of 0.0000 mm coincide. Therefore, Example 6 has the same or nearly the same effects as other examples.

[0124] Example 7 The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the first side surface S5 of the third lens L3 is flat; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is concave. Table 7 shows the basic parameters of the optical lens of Embodiment 7.

[0125] Table 7 Basic parameters of the optical lens in Example 7

[0126] The optical lens of Example 7 achieves a full-field MTF value of 0.46 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 7 has the same or nearly the same effects as other examples.

[0127] Example 8 The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the first side surface S5 of the third lens L3 is flat; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is concave. Table 8 shows the basic parameters of the optical lens of Embodiment 8.

[0128] Table 8 Basic parameters of the optical lens in Example 8

[0129] The optical lens of Example 8 achieves a full-field MTF value of 0.47 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 8 has the same or nearly the same effects as other examples.

[0130] Example 9 The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the first side surface S5 of the third lens L3 is convex; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is concave. Table 9 shows the basic parameters of the optical lens of Embodiment 9.

[0131] Table 9. Basic parameters of the optical lens in Example 9

[0132] The optical lens of Example 9 achieves a full-field MTF value of 0.47 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 9 has the same or nearly the same effects as other examples.

[0133] Example 10 The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the first side surface S5 of the third lens L3 is convex; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is concave. Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0134] Table 10 Basic parameters of the optical lens in Example 10

[0135] The optical lens of Example 10 achieves a full-field MTF value of 0.48 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 10 has the same or nearly the same effects as other examples.

[0136] Example 11 The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is flat. Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0137] Table 11 Basic parameters of the optical lens in Example 11

[0138] The optical lens of Example 11 achieves a full-field MTF value of 0.5 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 11 has the same or nearly the same effects as other examples.

[0139] Example 12 The following is for reference Figure 12 Describes an optical lens according to Embodiment 12 of this application. For example... Figure 12 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S8 of the fourth lens L4 is concave; and the second side surface S10 of the fifth lens L5 is flat. Table 12 shows the basic parameters of the optical lens of Embodiment 12.

[0140] Table 12 Basic parameters of the optical lens in Example 12

[0141] The optical lens of Example 12 achieves a full-field MTF value of 0.5 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 12 has the same or nearly the same effects as other examples.

[0142] Example 13 The following is for reference Figure 13 Describes an optical lens according to Embodiment 13 of this application. For example... Figure 13 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S10 of the fifth lens L5 is concave; and the second side surface S12 of the sixth lens L6 is flat. Table 13 shows the basic parameters of the optical lens of Embodiment 13.

[0143] Table 13 Basic parameters of the optical lens in Example 13

[0144] The optical lens of Example 13 achieves a full-field MTF value of 0.47 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 13 has the same or nearly the same effects as other examples.

[0145] Example 14 The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 14 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S10 of the fifth lens L5 is concave; and the second side surface S12 of the sixth lens L6 is flat. Table 14 shows the basic parameters of the optical lens of Embodiment 14.

[0146] Table 14 Basic parameters of the optical lens in Example 14

[0147] The optical lens of Example 14 achieves a full-field MTF value of 0.47 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 14 has the same or nearly the same effects as other examples.

[0148] Example 15 The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 15As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S10 of the fifth lens L5 is concave; and the second side surface S12 of the sixth lens L6 is convex. Table 15 shows the basic parameters of the optical lens of Embodiment 15.

[0149] Table 15 Basic parameters of the optical lens in Example 15

[0150] The optical lens of Example 15 achieves a full-field MTF value of 0.45 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 15 has the same or nearly the same effects as other examples.

[0151] Example 16 The following is for reference Figure 16 Describes an optical lens according to Embodiment 16 of this application. For example... Figure 16 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S10 of the fifth lens L5 is concave; and the second side surface S12 of the sixth lens L6 is convex. Table 16 shows the basic parameters of the optical lens of Embodiment 16.

[0152] Table 16 Basic parameters of the optical lens in Example 16

[0153] The optical lens of Example 16 achieves a full-field MTF value of 0.46 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 16 has the same or nearly the same effects as other examples.

[0154] Example 17 The following is for reference Figure 17 Describes an optical lens according to Embodiment 17 of this application. For example... Figure 17 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex; and the fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave. Table 17 shows the basic parameters of the optical lens of Embodiment 17.

[0155] Table 17 Basic parameters of the optical lens in Example 17

[0156] The optical lens of Example 17 achieves a full-field MTF value of 0.46 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 17 has the same or nearly the same effects as other examples.

[0157] Example 18 The following is for reference Figure 18 Describes an optical lens according to Embodiment 18 of this application. For example... Figure 18 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex; and the fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave. Table 18 shows the basic parameters of the optical lens of Embodiment 18.

[0158] Table 18 Basic parameters of the optical lens in Example 18

[0159] The optical lens of Example 18 achieves a full-field MTF value of 0.46 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 18 has the same or nearly the same effects as other examples.

[0160] Example 19 The following is for reference Figure 19 Describes an optical lens according to Embodiment 19 of this application. For example... Figure 19 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; and the second lens L2 has negative optical power. Table 19 shows the basic parameters of the optical lens of Embodiment 19.

[0161] Table 19 Basic parameters of the optical lens in Example 19

[0162] The optical lens of Example 19 achieves a full-field MTF value of 0.4 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 19 has the same or nearly the same effects as other examples.

[0163] Example 20 The following is for reference Figure 20 Describes an optical lens according to Embodiment 20 of this application. For example... Figure 20As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; and the second lens L2 has negative optical power. Table 20 shows the basic parameters of the optical lens of Embodiment 20.

[0164] Table 20 Basic parameters of the optical lens in Example 20

[0165] The optical lens of Example 20 achieves a full-field MTF value of 0.4 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 20 has the same or nearly the same effects as other examples.

[0166] Example 21 The following is for reference Figure 21 Describes an optical lens according to Embodiment 21 of this application. For example... Figure 21 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is convex; and the sixth lens L6 has negative optical power. Table 21 shows the basic parameters of the optical lens of Embodiment 21.

[0167] Table 21 Basic parameters of the optical lens in Example 21

[0168] The optical lens of Example 21 achieves a full-field MTF value of 0.41 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 21 has the same or nearly the same effects as other examples.

[0169] Example 22 The following is for reference Figure 22 Describes an optical lens according to Embodiment 22 of this application. For example... Figure 22 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is convex; and the sixth lens L6 has negative optical power. Table 22 shows the basic parameters of the optical lens of Embodiment 22.

[0170] Table 22 Basic parameters of the optical lens in Example 22

[0171] The optical lens of Example 22 achieves a full-field MTF value of 0.41 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 22 has the same or nearly the same effects as other examples.

[0172] Example 23 The following is for reference Figure 23 Describes an optical lens according to Embodiment 23 of this application. For example... Figure 23 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is convex; and the third lens L3 and the fourth lens L4 are not cemented together. Table 23 shows the basic parameters of the optical lens of Embodiment 23.

[0173] Table 23 Basic parameters of the optical lens in Example 23

[0174] The optical lens of Example 23 achieves a full-field MTF value of 0.42 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 23 has the same or nearly the same effects as other examples.

[0175] Example 24 The following is for reference Figure 24 Describes an optical lens according to Embodiment 24 of this application. For example... Figure 24 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is convex; and the third lens L3 and the fourth lens L4 are not cemented together. Table 24 shows the basic parameters of the optical lens of Embodiment 24.

[0176] Table 24 Basic parameters of the optical lens in Example 24

[0177] The optical lens of Example 24 achieves a full-field MTF value of 0.42 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 24 has the same or nearly the same effects as other examples.

[0178] Example 25 The following is for reference Figure 25 Describes an optical lens according to Embodiment 25 of this application. For example... Figure 25As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the sixth lens L6 has negative optical power; and the seventh lens L7 has positive optical power. Table 25 shows the basic parameters of the optical lens of Embodiment 25.

[0179] Table 25 Basic parameters of the optical lens in Example 25

[0180] The optical lens of Example 25 achieves a full-field MTF value of 0.43 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 25 has the same or nearly the same effects as other examples.

[0181] Example 26 The following is for reference Figure 26 Describes an optical lens according to Embodiment 26 of this application. For example... Figure 26 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the sixth lens L6 has negative optical power; and the seventh lens L7 has positive optical power. Table 26 shows the basic parameters of the optical lens of Embodiment 26.

[0182] Table 26 Basic parameters of the optical lens in Example 26

[0183] The optical lens of Example 26 achieves a full-field MTF value of 0.44 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 26 has the same or nearly the same effects as other examples.

[0184] Example 27 The following is for reference Figure 27 Describes an optical lens according to Embodiment 27 of this application. For example... Figure 27 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave, with an ENPD of 26.5mm and an aperture size of 2.264. Table 27 shows the basic parameters of the optical lens of Embodiment 27.

[0185] Table 27 Basic parameters of the optical lens in Example 27

[0186] The optical lens of Example 27 achieves a full-field MTF value of 0.73 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 27 has the same or nearly the same effects as other examples.

[0187] Example 28 The following is for reference Figure 28 Describes an optical lens according to Embodiment 28 of this application. For example... Figure 28 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave, with an ENPD of 23mm and an aperture size of 2.609. Table 28 shows the basic parameters of the optical lens of Embodiment 28.

[0188] Table 28 Basic parameters of the optical lens in Example 28

[0189] The optical lens of Example 28 achieves a full-field MTF value of 0.65 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 28 has the same or nearly the same effects as other examples.

[0190] Example 29 The following is for reference Figure 29 Describes an optical lens according to Embodiment 29 of this application. For example... Figure 29 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex; the fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave; the sixth lens L6 has negative optical power; and the seventh lens L7 has positive optical power. Table 29 shows the basic parameters of the optical lens of Embodiment 29.

[0191] Table 29 Basic parameters of the optical lens in Example 29

[0192] The optical lens of Example 29 achieves a full-field MTF value of 0.15 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 29 has the same or nearly the same effects as other examples.

[0193] Example 30 The following is for reference Figure 30 Describes an optical lens according to Embodiment 30 of this application. For example... Figure 30As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is concave; the third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex; the fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave; and the seventh lens L7 has positive optical power. Table 30 shows the basic parameters of the optical lens of Embodiment 30.

[0194] Table 30 Basic parameters of the optical lens in Example 30

[0195] The optical lens of Example 30 achieves a full-field MTF value of 0.9 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 30 has the same or nearly the same effects as other examples.

[0196] Example 31 The following is for reference Figure 31 Describes an optical lens according to Embodiment 31 of this application. For example... Figure 31 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave. Table 31 shows the basic parameters of the optical lens of Embodiment 31.

[0197] Table 31 Basic parameters of the optical lens in Example 31

[0198] The optical lens of Example 31 achieves a full-field MTF value of 0.6 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 31 has the same or nearly the same effects as other examples.

[0199] Example 32 The following is for reference Figure 32 Describes an optical lens according to Embodiment 32 of this application. For example... Figure 32 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is concave; the second side surface S8 of the fourth lens L4 is concave. Table 32 shows the basic parameters of the optical lens of Embodiment 32.

[0200] Table 32 Basic parameters of the optical lens in Example 32

[0201] The optical lens of Example 32 achieves a full-field MTF value of 0.45 or higher at a spatial frequency of 65 lp / mm. Therefore, Example 32 has the same or nearly the same effects as other examples.

[0202] Tables 33-1, 33-2, 33-3, and 33-4 provide the basic parameters of the optical lenses in Examples 1-32, such as F, ENPD, STOTTL, FOV, θ, H, TL, BFL, DST, DMAX, D11, D12, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, D71, D72, F34, F14, F57, and Fmin. Wherein, D12 is the maximum aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens; D21 is the maximum aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens; D22 is the maximum aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens; D31 is the maximum aperture of the first side of the third lens corresponding to the maximum field of view of the optical lens; D32 is the maximum aperture of the second side of the third lens corresponding to the maximum field of view of the optical lens; D41 is the maximum aperture of the first side of the fourth lens corresponding to the maximum field of view of the optical lens; and D42 is the maximum aperture of the second side of the third lens corresponding to the maximum field of view of the optical lens. The maximum aperture of the second side of the fourth lens is D51, the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens is D52, the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens is D61, the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D62, the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens is D71, the maximum aperture of the first side of the seventh lens corresponding to the maximum field of view of the optical lens is D72, and the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens is D72.

[0203] Table 33-1 Basic parameters of the optical lenses in Examples 1-8

[0204] Table 33-2 Basic parameters of the optical lenses in Examples 9-16

[0205] Table 33-3 Basic parameters of the optical lenses in Examples 17-24

[0206] Table 33-4 Basic parameters of the optical lenses in Examples 25-32

[0207] In summary, the conditional expressions of each embodiment in Examples 1-32 satisfy the relationships shown in Tables 34-1, 34-2, 34-3 and 34-4.

[0208] Table 34-1 Conditional Expressions in Examples 1-8

[0209] Table 34-2 Conditional Expressions in Examples 8-16

[0210] Table 34-3 Conditional Expressions in Examples 17-24

[0211] Table 34-4 Conditional Expressions in Examples 25-32

[0212] This application also provides an electronic device, including a first device and / or a second device. The first device may be, for example, a lidar transmitter, and the second device may be, for example, a lidar receiver. The first device may include the optical lens and light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device may include the optical lens as described in the exemplary embodiments above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element is disposed on the second side of the optical lens (e.g., disposed on the imaging surface). The imaging element may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens. As a projection architecture, the imaging element may be a DMD, Micro LED, LCoS, MEMS chip, etc. The imaging chip (DMD, Micro LED array, LCoS, MEMS light modulation chip) generates an image, which is then magnified and imaged by a subsequent projection optical lens group, ultimately projecting a clear image onto the target imaging surface.

[0213] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with positive optical power has a convex first side surface; A second lens with optical power has a convex first side surface; A third lens with optical power; A fourth lens having an optical power opposite to that of the third lens; The fifth lens with positive optical power has a convex first side surface; The sixth lens, which has optical power, has a convex first side surface; The seventh lens with optical power has a convex first side and a concave second side. The optical lens has seven lenses with optical power. The optical lens satisfies: 0.8 ≤ F1 / F ≤ 4 and 0.059 ≤ T45 / F ≤ 0.299; Wherein, F1 is the focal length of the first lens, F is the total focal length of the optical lens group, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

2. The optical lens according to claim 1, characterized in that, The optical lens also includes: An aperture stop is positioned in front of the first lens.

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

4. The optical lens according to claim 1, characterized in that, The third lens and the fourth lens are glued together to form a glued component.

5. The optical lens according to any one of claims 1 to 4, characterized in that, The focal length F2 of the second lens and the total focal length F of the optical lens satisfy: 1.1≤|F2 / F|≤6.

6.

6. The optical lens according to any one of claims 1 to 4, characterized in that, The focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: 0.48≤|F3 / F|≤1.

9.

7. The optical lens according to any one of claims 1 to 4, characterized in that, The focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: 0.79≤F5 / F≤6.

2.

8. The optical lens according to any one of claims 1 to 4, characterized in that, The air gap T45 between the fourth and fifth lenses on the optical axis and the total optical length TL of the lens group of the optical lens satisfy the following condition: 0.059≤T45 / TL≤0.

19.

9. The optical lens according to any one of claims 1 to 4, characterized in that, The combined focal length F34 of the third lens and the fourth lens satisfies the following condition with the overall focal length F of the optical lens: -6.3≤F34 / F≤-0.

83.

10. The optical lens according to any one of claims 1 to 4, characterized in that, The optical back focal length BFL of the optical lens and the focal length F7 of the seventh lens satisfy the following condition: 0.066≤|BFL / F7|≤1.

245.

11. The optical lens according to any one of claims 1 to 4, characterized in that, The air gap T45 between the fourth and fifth lenses on the optical axis and the focal length F5 of the fifth lens satisfy the following condition: 0.06≤T45 / F5≤0.

18.

12. The optical lens according to claim 2, characterized in that, The distance L from the aperture stop to the first side of the first lens and the focal length F1 of the first lens satisfy the condition: 0.14≤L / F1≤1.

35.

13. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 0.33≤|F4 / F|≤2, 0.68≤|F6 / F|≤4.5, 0.55≤|F7 / F|≤5.5, 0.2≤|F1 / F2|≤2.1, -1.638 ≤F3 / F4≤-0.484, 1.78≤|Fmin / H|≤5.7, 0.064≤BFL / F5≤0.776 or 0.188≤|F7 / F5|≤4.1; Wherein, F4 is the focal length of the fourth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, Fmin is the minimum absolute value of the focal lengths of all lenses in the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, and F5 is the focal length of the fifth lens.

14. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 0.89≤F14 / TL≤2.95 or 0.3≤F14 / F57≤4.9; Wherein, F14 is the combined focal length of the first lens, the second lens, the third lens and the fourth lens, TL is the total optical length of the lens group of the optical lens, and F57 is the combined focal length of the fifth lens, the sixth lens and the seventh lens.

15. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 0.5≤R1 / F≤2.8, 0.115≤R14 / F≤0.92, 0.074≤|R3 / F2|≤1.886, 0.171≤R13 / F≤0.831 or 0.486≤R13 / R14≤3.219; Wherein, R1 is the center radius of curvature of the first side surface of the first lens, R14 is the center radius of curvature of the second side surface of the seventh lens, R3 is the center radius of curvature of the first side surface of the second lens, F2 is the focal length of the second lens, and R13 is the center radius of curvature of the first side surface of the seventh lens.

16. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 50≤(FOV×F) / H / 1°≤61, 1≤TL / F≤1.85, 0.358≤TL / H / FOV×1°≤1.095, 0.139≤D11 / H / FOV×1°≤0.545, 0.027≤D11 / H / F×1mm≤0.09, 1.137≤TL / D MAX≤4.008, 0.155≤(F×θ) / D11 / 1rad≤0.547, 0.034≤F / ENPD / D11×1mm≤0.116, 0.228≤DST / F≤0.66, 4≤F / H≤6.4, 0.108≤BFL / STOTTL≤0.429; Wherein, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TL is the total optical length of the lens group of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the effective aperture of the aperture stop, BFL is the optical back focal length of the optical lens, and STOTTL is the total optical length of the optical lens.

17. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 52≤(FOV×F) / H / 1°≤59, 1.133≤TL / F≤1.694, 0.511≤TL / H / FOV×1°≤0.842, 1.624≤TL / DMAX≤3.083, 0.222≤(F×θ) / D11 / 1rad≤0.421, 0.199≤D11 / H / FOV×1°≤0.419, 0.039≤D11 / H / F×1mm≤0.069, 0.154≤BFL / STOTTL≤0.33, 4.177≤F / H≤6.262, 0.048≤F / ENPD / D11×1mm≤0.089, 0.326≤DST / F≤0.508, 0.836≤F1 / F≤3.786, 1.324≤|F2 / F|≤6.498, 0.554≤|F3 / F|≤1.761, 0.366≤|F4 / F|≤1.946, 0.832≤F5 / F≤5.978, 0.717≤|F6 / F|≤4.288, 0.578≤|F7 / F|≤5.245, 0.062≤T45 / TL≤0.171, 0.978≤F14 / TL≤2.808, 0.551≤R1 / F≤2.646, 0.164≤R14 / F≤0.708, 0.224≤|F1 / F2|≤1.954, -2.34≤F3 / F4≤-0.372, 0.106≤|R3 / F2|≤1.451, 0.315≤F14 / F57≤4.807, 1.895≤|Fmin / H|≤5.5, 0.244≤R13 / F≤0.639, 0.694≤R13 / R14≤2.476, 0.153≤L / F1≤1.266, -6.182≤F34 / F≤-0.874, 0.084≤T45 / F≤0.23, 0.094≤|BFL / F7|≤0.958, 0.031≤T45 / F5≤0.182, 0.091≤BFL / F5≤0.597 or 0.198≤|F7 / F5|≤3.896; Wherein, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TL is the total optical length of the lens group of the optical lens, DMAX is the maximum value of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, STOTTL is the total optical length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the effective aperture of the aperture stop, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, and F5 is the focal length of the fourth lens. The focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F14 is the combined focal length of the first lens, the second lens, the third lens, and the fourth lens, R1 is the central radius of curvature of the first side of the first lens, R14 is the central radius of curvature of the second side of the seventh lens, R3 is the central radius of curvature of the first side of the second lens, F57 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens, Fmin is the minimum absolute value of the focal lengths of each lens in the optical lens, R13 is the central radius of curvature of the first side of the seventh lens, L is the distance from the aperture stop to the first side of the first lens, and F34 is the combined focal length of the third lens and the fourth lens.

18. The optical lens according to any one of claims 1 to 4, characterized in that, The optical lens satisfies at least one of the following relationships: 56.463≤(FOV×F) / H / 1°≤57.38, 1.333≤TL / F≤1.473, 0.601≤TL / H / FOV×1°≤0.732, 1.911≤TL / DMAX≤2.681, 0.261≤(F×θ) / D11 / 1rad≤0.366, 0.234≤D11 / H / FOV×1°≤0.364, 0.046≤D11 / H / F×1mm≤0.06, 0.181≤BFL / STOTTL≤0.287, 4.914≤F / H≤5.445, 0.057≤F / ENPD / D11×1mm≤0.077, 0.383≤DST / F≤0.442, 0.984≤F1 / F≤3.292, 1.558≤|F2 / F|≤5.65, 0.652≤|F3 / F|≤1.531, 0.431≤|F4 / F|≤1.692, 0.979≤F5 / F≤5.198, 0.844≤|F6 / F|≤3.729, 0.68≤|F7 / F|≤4.561, 0.073≤T45 / TL≤0.149, 1.151≤F14 / TL≤2.442, 0.648≤R1 / F≤2.301, 0.193≤R14 / F≤0.616, 0.264≤|F1 / F2|≤1.699, -2.035≤F3 / F4≤-0.438, 0.125≤|R3 / F2|≤1.262, 0.37≤F14 / F57≤4.18, 2.229≤|Fmin / H|≤4.783, 0.287≤R13 / F≤0.556, 0.816≤R13 / R14≤2.153, 0.18≤L / F1≤1.101, -5.376≤F34 / F≤-1.028, 0.099≤T45 / F≤0.2, 0.111≤|BFL / F7|≤0.833, 0.037≤T45 / F5≤0.158, 0.107≤BFL / F5≤0.519, or 0.233≤|F7 / F5|≤3.388; Wherein, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TL is the total optical length of the lens group of the optical lens, DMAX is the maximum value of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, STOTTL is the total optical length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the effective aperture of the aperture stop, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, and F5 is the focal length of the fourth lens. The focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F14 is the combined focal length of the first lens, the second lens, the third lens, and the fourth lens, R1 is the central radius of curvature of the first side of the first lens, R14 is the central radius of curvature of the second side of the seventh lens, R3 is the central radius of curvature of the first side of the second lens, F57 is the combined focal length of the fifth lens, the sixth lens, and the seventh lens, Fmin is the minimum absolute value of the focal lengths of each lens in the optical lens, R13 is the central radius of curvature of the first side of the seventh lens, L is the distance from the aperture stop to the first side of the first lens, and F34 is the combined focal length of the third lens and the fourth lens.

19. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 18; as well as At least one of an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

Images