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 negative refractive power; a third lens with negative refractive power; a fourth lens with positive refractive power; a fifth lens with positive refractive power, the first side of which is a convex surface; a sixth lens with refractive power; the number of lenses with refractive power in the optical lens is six; the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all glass spherical lenses. The optical lens has a high light flux and a large aperture number, has the characteristics of high resolution, high imaging quality, high stability and low cost, and can realize miniaturization of the optical lens.

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] With the advancement of intelligent driving technology, advanced intelligent driving technologies (such as visual perception and radar technology) have gradually entered the public eye. Automotive optical lenses, characterized by their high light throughput, can maintain stable performance in various lighting conditions. While maintaining high performance, they also offer the advantage of low cost, allowing them to secure a place in the wave of continuously reducing vehicle manufacturing costs. For example, even during the day or in low-light conditions, the judgments made by automotive optical lenses can still maintain accurate calculations and outputs for autonomous driving. At high speeds, automotive optical lenses can provide long-distance judgments, ensuring the safety of people and vehicles.

[0003] The more complex the surface shape of a lens, the more degrees of freedom it offers for optimization. However, spherical lenses can only provide one variable for surface shape control: the radius of curvature at the center of the sphere. Aspherical lenses, on the other hand, can introduce higher-order aspherical coefficients as variables depending on the expression. Therefore, aspherical designs are more likely to provide better performance than spherical designs. Under the design requirement of cost reduction, achieving the imaging requirements of optical lenses containing aspherical lenses with all-glass spherical lenses is a goal pursued by those skilled in the art.

[0004] Furthermore, existing automotive optical lenses suffer from problems such as the incompatibility between high performance and low cost, the inability to match stable performance with the stringent requirements of various environments, and the inability of large aperture attributes to coexist with high resolution. Summary of the Invention

[0005] This application aims to provide an optical lens and electronic device to solve at least one of the above-mentioned technical problems.

[0006] The first aspect of this application provides an optical lens comprising, along an optical axis from a first side to a second side: a first lens having positive optical power, the first side of which is convex; a second lens having negative optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having positive optical power, the first side of which is convex; and a sixth lens having optical power; the optical lens having six lenses having optical power; and the first, second, third, fourth, fifth, and sixth lenses are all made of glass. Spherical lens; the optical lens satisfies the following relationships: -1.8≤F / F6≤0.2, 1.35≤F / ENPD≤1.7, 1.4≤TTL / F≤2.7, 1≤F1 / F≤2.8, 0.9≤F4 / F≤2 and 0.55≤F5 / F≤1.5; where F is the focal length of the entire optical lens group, F6 is the focal length of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F1 is the focal length of the first lens, F4 is the focal length of the fourth lens, and F5 is the focal length of the fifth 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 convex; the first side surface of the second lens is concave, and the second side surface is concave; or the first side surface of the second lens is concave, and the second side surface is convex; or the first side surface of the second lens is convex, and the second side surface is concave; the first side surface of the third lens is convex, and the second side surface is concave; or the first side surface of the third lens is concave, and the second side surface is concave; or the first side surface of the third lens is concave, and the second side surface is convex; the first side surface of the fourth lens is convex, and the second side surface is convex; or the first side surface of the fourth lens is concave, and the second side surface is convex; or the first side surface of the fourth lens is convex, and the second side surface is concave; the second side surface of the fifth lens is concave; or, the second side surface of the fifth lens is convex; the sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface is convex; or the sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface is concave; or the sixth lens has positive optical power, and the first side surface of the sixth lens is convex, and the second side surface is concave.

[0008] The letters in this application have the following meanings: DFOV 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; θ is the radian value of the maximum field of view of the optical lens; DMAX is the maximum value among the maximum aperture values ​​of all lenses corresponding to the maximum field of view of the optical lens; D11 is the maximum aperture value 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; 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; R51 is the focal length of the third lens; and D2 is the focal length of the fourth lens. The center curvature radius of the first side of the fifth lens, CT6 is the center thickness of the sixth lens, CTmax is the maximum center thickness of the third to fifth lenses, Ctmin is the minimum center thickness of the third to fifth lenses, SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG51 is the sag of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, FR51 is the image-side focal length of the first side of the fifth lens, and FR42 is the image-side focal length of the second side of the fourth lens.

[0009] According to an exemplary embodiment of this application, the focal length F2 of the second lens and the focal length F of the entire optical lens group satisfy: -2≤F / F2<0.

[0010] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the focal length F3 of the third lens satisfy: -1.9≤F / F3<0.

[0011] According to an exemplary embodiment of this application, the central curvature radius R51 of the first side surface of the fifth lens and the central curvature radius R42 of the second side surface of the fourth lens satisfy: R51 < |R42|.

[0012] According to an exemplary embodiment of this application, the center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy: 0.025≤CT6 / F≤0.22.

[0013] According to an exemplary embodiment of this application, the maximum value of the center thickness CTmax of the third to fifth lenses and the minimum value of the center thickness Ctmin of the third to fifth lenses satisfy: 1≤CTmax / Ctmin≤3.2.

[0014] According to an exemplary embodiment of this application, the sag SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens and the sag SAG51 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens satisfy: -1.4≤SAG42 / SAG51≤0.22.

[0015] According to an exemplary embodiment of this application, the single-sided focal length FR51 of the first side of the fifth lens and the total focal length F of the optical lens group satisfy: 1.2≤FR51 / F≤2.7.

[0016] According to an exemplary embodiment of this application, the maximum field of view (DFOV) of the optical lens, the focal length F of the entire optical lens group, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 50≤(DFOV×F) / H / 1°≤65.

[0017] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group, 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: 0.6≤(F×θ) / D11 / 1rad≤1.2.

[0018] According to an exemplary embodiment of this application, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0<|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.065.

[0019] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.2≤F / H≤2.2.

[0020] According to an exemplary embodiment of this application, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1.

[0021] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 25≤TTL / 1mm≤38, 4≤TTL / H / θ×1rad≤7.5, 2.2≤TTL / DMAX≤3.5, 1.2≤D11 / H / θ×1rad≤2.75, 0.01≤D11 / H / F×1mm≤0.2, 0.05≤BFL / TTL≤0.185, 0.1≤F / ENPD / D11×1mm≤0.175, 0.4≤DST / F≤0.7, 0.3≤R51 / F≤1.25 or -6≤FR42 / F≤2.4.

[0022] According to an exemplary embodiment of this application, the maximum field of view (DFOV) of the optical lens satisfies: 25° ≤ DFOV ≤ 45°.

[0023] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.9≤F4 / F≤1.75, 0.6≤F5 / F≤1.25, -1.4≤F / F6≤-0.7, -0.85≤SAG42 / SAG51≤-0.4, 1.3≤FR51 / F≤2 or 1≤FR42 / F≤2.2.

[0024] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 56.317≤(DFOV×F) / H / 1°≤58.831, 1.789≤TTL / F≤2.282, 4.666≤TTL / H / θ×1rad≤7.069, 2.593≤TTL / DMAX≤3.148, 0.799≤(F×θ) / D11 / 1rad≤0.88, 1.656≤D11 / H / θ×1rad≤2.468, 0.067≤D11 / H / F×1mm≤0.088, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.026, 0.069≤BFL / TTL≤0.144, 1.441≤F / H≤1.973, 1.4≤F / ENPD≤1.7, 0.125≤F / ENPD / D11×1mm≤0 .157, 0.468≤DST / F≤0.62, 0.943≤(H / 2) / (F×tan(θ / 2))≤0.994, 1.104≤F1 / F≤2.263, -1.675≤F / F2 ≤-0.031, -1.65≤F / F3≤-0.031, 0.954≤F4 / F≤1.525, 0.801≤F5 / F≤1.131, 0.532≤R51 / F≤0.797, 0.04 5≤CT6 / F≤0.054, 1.048≤CTmax / Ctmin≤2.983, -1.237≤F / F6≤-0.83, -0.754≤SAG42 / SAG51≤-0.49, 1.4≤FR51 / F≤1.891, 1.23≤FR42 / F≤1.988, 27.9999≤TTL / 1mm≤34.0008 or 28.5999≤DFOV / 1°≤40.3950.

[0025] 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.

[0026] The optical lens according to the embodiments of this application employs six lenses with optical power. The first lens has positive optical power and can converge light, allowing more large-angle light to be gathered, increasing the light transmission of the optical lens and reducing the overall size of the rear lens group. The positive optical power of the first lens significantly improves image quality; a large amount of negative spherical aberration greatly reduces the pressure of spherical aberration in the rear group. For large-angle or wide-field light, it simultaneously corrects field curvature and coma, making the image plane clearer. The first side surface of the first lens is convex, giving it a significant advantage in water accumulation inheritance. The convexity of the first side surface also avoids some reflected ghosting, allowing light to deviate further from the imaging plane and preventing ghosting interference.

[0027] The second lens has negative optical power. In conjunction with the aberration correction produced by the first lens and the light guidance of the rear space diaphragm, the negative optical power of the second lens can effectively correct the field curvature and distortion of the positive optical power of the first lens, and can also provide more potential for large aperture.

[0028] The third lens has negative optical power, which can balance the excessive positive optical power of the rear group and correct spherical aberration, field curvature, and distortion. The negative optical power of the third lens has a diverging effect on light, which can effectively reduce stray light and other reflections and absorption for large-angle light.

[0029] The fourth lens has positive optical power and converges light for the first time, effectively reducing the light beam height and decreasing the aperture of the subsequent lens group, thus achieving miniaturization and low cost. In terms of performance, the fourth lens's light-converging ability effectively controls edge light, with particularly noticeable correction for coma and field curvature. The optimization of the edge field of view further reduces chromatic aberration, allowing for further performance improvements.

[0030] The fifth lens has positive optical power, which can further compress light, enabling miniaturization of the optical lens. The reintroduction of positive optical power in the fifth lens makes the overall focal length distribution of the optical lens more rational, preventing it from concentrating on any single lens. This rational focal length distribution allows the optical lens to maintain relatively stable performance under high and low temperature conditions. The first side of the fifth lens is convex, ensuring that a large amount of upward-facing light from the fourth lens can be fully received by the fifth lens, increasing the effective light transmission of the optical lens to a certain extent. The convex first side of the fifth lens also significantly compresses light, maintaining the miniaturization of the rear aperture of the optical lens. Furthermore, the convex first side of the fifth lens can also perform a significant amount of correction for the first group of spherical aberrations, correcting the light entering the image plane.

[0031] The first, second, third, fourth, fifth, and sixth lenses are all glass spherical lenses. The lenses from the first to the sixth lens are made of glass, and through the combination of materials and structure, a heat-free function can be achieved.

[0032] This application achieves a low-cost vehicle-mounted telephoto lens by rationally allocating the optical power ratio, lens surface structure, and the center thickness and center radius of curvature of each lens on the optical axis, while simultaneously controlling the overall size and optical ratio of the optical lens. This ensures that the optical lens meets the following specifications: -1.8≤F / F6≤0.2, 1.35≤F / ENPD≤1.7, 1.4≤TTL / F≤2.7, 1≤F1 / F≤2.8, 0.9≤F4 / F≤2, and 0.55≤F5 / F≤1.5.

[0033] The focal length F of the entire optical lens assembly and the focal length F6 of the sixth lens satisfy the condition: -1.8 ≤ F / F6 ≤ 0.2. The sixth lens bears the aberration pressure generated by static elements in front, thus improving image quality.

[0034] The focal length F of the entire optical lens assembly and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.35≤F / ENPD≤1.7. The optical lens has a large aperture and can adapt to low-light environments during lens use.

[0035] The total optical length (TTL) and focal length (F) of the optical lens satisfy the condition: 1.4 ≤ TTL / F ≤ 2.7. This balances the total optical length and focal length of the optical lens, achieving the required telephoto and miniaturization characteristics of the optical lens.

[0036] The focal length F1 of the first lens satisfies the following condition with the overall focal length F of the optical lens group: 1 ≤ F1 / F ≤ 2.8. As the first lens element of the optical lens, controlling its focal length within a certain range plays a crucial role in controlling spherical aberration, field curvature, and illumination. Simultaneously, the optical power of the first lens influences the overall lens group distribution, contributing to the miniaturization and low sensitivity of the optical lens.

[0037] The focal length F4 of the fourth lens satisfies the following condition with the focal length F of the entire optical lens group: 0.9≤F4 / F≤2. The fourth lens can bear most of the converging pressure, which not only suppresses the light transmission aperture and the total optical length, but also allows the light to converge slowly in the rear, achieving long focal length and low sensitivity.

[0038] The focal length F5 of the fifth lens satisfies the following condition with the focal length F of the entire optical lens group: 0.55≤F5 / F≤1.5. This can efficiently converge the beam, compress the size of the rear optical path, and achieve compactness of the optical lens. It also works with each lens to balance field curvature and chromatic aberration, disperse the convergence load of the optical lens, and improve the imaging performance of the entire field of view. Attached Figure Description

[0039] 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. Figures 1-20 Schematic diagrams of the optical lenses according to Embodiments 1-20 of this application are shown respectively; Figure 21 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown. Figure 22 A schematic diagram of the distortion of an optical lens according to Embodiment 1 of this application is shown; Figure 23 A schematic diagram of the relative illumination of an optical lens according to Embodiment 1 of this application is shown; Figure 24 A schematic diagram showing the sagittal height of two sides of the fourth and fifth lenses according to embodiments of this application is shown.

[0040] 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; Aperture stop STO; Protective glass L7; IR filter L8; 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 of the protective glass L7 is S13, and the second side of the protective glass L7 is S14. The first side surface S15 of the IR filter L8, and the second side surface S16 of the IR filter L8. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] The features, principles and other aspects of this application are described in detail below.

[0044] An optical lens according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0045] In an example embodiment, the optical lens can be used as, for example, an imaging optical 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 optical lens can be a vehicle-mounted optical lens, a security monitoring optical lens, or a radar receiver optical lens. In an example embodiment, the optical lens can be used as, for example, a projection optical lens or a lidar transmitter optical 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 an example embodiment, the optical lens provided in this application can be used as a light-receiving optical lens or a light-emitting optical lens. The light-receiving optical 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 and laser point clouds. The light-emitting optical lens is typically used to transmit light from a 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 optical lens such as a camera optical lens, a lidar receiver optical lens, a microscopic optical lens, or a telescope optical 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 optical 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 optical lens such as a projection optical lens or a lidar transmitter optical 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 is used in a lidar optical lens that shares a light-receiving and light-emitting path, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. For example, the optical lens provided in this application is used in an optical communication and radar integration optical lens, which simultaneously performs the functions of transmitting modulated optical signals and receiving radar echo beams.

[0046] In the example implementation, the first lens has positive optical power, which can converge light. Larger angle rays can be gathered by the optical lens, increasing the light transmission of the optical lens and reducing the overall size of the rear lens group. The positive optical power of the first lens significantly improves image quality; a large amount of negative spherical aberration greatly reduces the pressure of rear spherical aberration. For large-angle or wide-field rays, it simultaneously corrects field curvature and coma, making the image plane clearer. The first side of the first lens is convex, giving it a significant advantage in water accumulation inheritance. The convexity of the first side also avoids some reflected ghosting, allowing light to deviate further from the imaging plane and preventing ghosting interference. The second side of the first lens can be concave or convex. The second side adjusts the light passing through the first side, its main function being to ensure a smooth transition of light from different fields of view to the second lens. Simultaneously, utilizing its surface shape advantage, it performs some correction work. The main image quality correction of the first lens is also concentrated on the second side.

[0047] In the example implementation, the second lens has negative optical power. Combined with the aberration correction produced by the first lens and the light guidance from the rear group spatial aperture, the negative optical power of the second lens effectively corrects the field curvature and distortion of the positive optical power of the first lens, and also has greater potential to assist in large apertures. The first side of the second lens is concave or convex. This first side receives light from the first lens and simultaneously corrects residual aberrations, primarily field curvature and coma. At the same time, the first side of the second lens and the second side of the first lens can also effectively reduce some chromatic aberration. The second side of the second lens is concave or convex. To maintain the optical power effect of the second lens, it plays a crucial role in addressing the weaker front group aberrations when paired with the first lens. The second side of the second lens guides light into the aperture stop. With different aperture stop diameters, the second side of the second lens can also be adjusted to match, achieving combinations of different aperture numbers.

[0048] In the example embodiment, the third lens has negative optical power, which can balance the excessive positive optical power of the rear group and correct spherical aberration, field curvature, and distortion. The negative optical power of the third lens has a diverging effect on light, effectively reducing stray light and other reflections and absorptions for large-angle light. The first side of the third lens is convex or concave, which can receive light emitted from the second side of the second lens and correct residual aberrations, mainly field curvature and coma. The second side of the third lens is concave or convex, which can avoid ghosting and stray light risks, and guide light into the fourth lens, reducing the sensitivity of the optical lens.

[0049] In the example implementation, the fourth lens has positive optical power and converges light rays for the first time, effectively reducing the light beam height and decreasing the aperture of the subsequent lens group, thus achieving miniaturization and low cost. In terms of performance, the fourth lens's convergence effectively controls edge rays, particularly noticeable in correcting coma and field curvature. Optimization of the edge field of view further reduces chromatic aberration, allowing for further performance improvements. The first side of the fourth lens is either convex or concave, matching the front group rays to achieve reverse aberration correction and smooth reception, improving image quality while reducing the sensitivity of the optical lens and increasing yield. The second side of the fourth lens is also either convex or concave. This second side is the primary surface for aberrations in the fourth lens; the spherical aberration and field curvature required by the optical lens are contributed by the fourth lens, mainly provided by its second side.

[0050] In the example implementation, the fifth lens has positive optical power, which can further compress light, achieving miniaturization of the optical lens. The reintroduction of positive optical power in the fifth lens makes the overall focal length distribution of the optical lens more rational, preventing concentration on any single lens. This rational focal length distribution allows the optical lens to maintain relatively stable performance under high and low temperature conditions. The first side of the fifth lens is convex, ensuring that a large amount of upward-facing light from the fourth lens can be received by the fifth lens, increasing the effective light transmission of the optical lens to a certain extent. The convex first side of the fifth lens also significantly compresses light, maintaining the miniaturization of the rear aperture of the optical lens. The convex first side of the fifth lens can also perform a large amount of correction work on the front group spherical aberration, correcting the light entering the image plane. The second side of the fifth lens is either concave or convex, guiding light to enter the sixth lens at a certain angle, reducing the correction pressure on the sixth lens. Simultaneously, the second side of the fifth lens also reduces image quality differences between different fields of view, improving the overall quality of the optical lens.

[0051] In the example implementation, the sixth lens has either negative or positive optical power. The positive optical power of the sixth lens can further improve the residual aberrations after correction by the fifth lens. The negative optical power of the sixth lens provides negative field curvature, correcting residual aberrations in the optical lens. The negative optical power of the sixth lens allows light to be fully corrected before falling onto the image, resulting in significant improvements in illumination, resolution, and color cast. The first side of the sixth lens is either concave or convex, which can collect and converge light rays and use its surface shape for aberration correction. The second side of the sixth lens is either convex or concave, which can control the direction and angle of light, making the image clearer and reducing various color cast problems.

[0052] In an example embodiment, the optical lens may further include an aperture stop disposed between the second lens and the third lens. The aperture stop, located between the second and third lenses, facilitates effective light convergence entering the optical lens, reduces the aperture of the lens at the rear end of the optical lens, and lowers the assembly sensitivity of the optical lens.

[0053] In the example implementation, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens are all glass spherical lenses. The lenses of the first to sixth lenses are made of glass, and through the combination of materials and structure, a heat-free function is achieved.

[0054] In an example embodiment, the optical lens may further include an infrared cut-off filter (IR) located between the sixth lens and the image plane to filter light of different wavelengths. The optical lens may also, as needed, have a cover glass (CG) between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0055] In an example embodiment, 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).

[0056] In the example implementation, the maximum field of view (DFOV) of the optical lens, the focal length F of the entire optical lens group, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 50 ≤ (DFOV × F) / H / 1° ≤ 65. Preferably, 56.317 ≤ (DFOV × F) / H / 1° ≤ 58.831. Controlling the range of this relationship allows the optical lens to possess telephoto and large-aperture characteristics, realizing the telephoto function of the lens and eight million or even ten million pixels.

[0057] In the example implementation, the total optical length (TTL) of the optical lens and the focal length (F) of the entire optical lens assembly satisfy: 1.4 ≤ TTL / F ≤ 2.7. Preferably, 1.789 ≤ TTL / F ≤ 2.282. By controlling the range of this relationship, the total optical length and focal length of the optical lens are balanced, achieving the required telephoto and miniaturized characteristics of the optical lens.

[0058] In the example implementation, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) of the maximum field of view of the optical lens satisfy: 4 ≤ TTL / H / θ × 1 rad ≤ 7.5. Preferably, 4.666 ≤ TTL / H / θ × 1 rad ≤ 7.069. Controlling the range of this relationship allows the optical lens to balance miniaturization and large-area imaging, meeting the application scenarios of eight million or even ten million pixels.

[0059] In the example implementation, the total optical length (TTL) 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: 2.2 ≤ TTL / DMAX ≤ 3.5. Preferably, 2.593 ≤ TTL / DMAX ≤ 3.148. By controlling the range of this relationship and keeping the ratio of the total optical length to the maximum lens aperture small, the entire optical lens can be made more compact and smaller.

[0060] In the example embodiment, the focal length F of the entire optical lens assembly, the radian value θ of the maximum field of view 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: 0.6 ≤ (F×θ) / D11 / 1rad ≤ 1.2. Preferably, 0.799 ≤ (F×θ) / D11 / 1rad ≤ 0.88. By controlling the range of this relationship, when the maximum field of view of the optical lens is constant, a smaller maximum aperture of the optical lens can result in a smaller front aperture of the optical lens, thereby reducing the imaging volume of the optical lens.

[0061] In the example embodiment, 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 radian value θ of the maximum field of view of the optical lens satisfy 1.2 ≤ D11 / H / θ × 1rad ≤ 2.75. Preferably, 1.656 ≤ D11 / H / θ × 1rad ≤ 2.468. Controlling the range of this relationship allows the optical lens to have miniaturization and large target surface characteristics, achieving eight million or even ten million pixels.

[0062] In the example embodiment, 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 focal length F of the entire optical lens assembly satisfy: 0.01≤D11 / H / F×1mm≤0.2. Preferably, 0.067≤D11 / H / F×1mm≤0.088. By controlling the range of this relationship, the optical lens can possess both miniaturization and telephoto capabilities with a large target surface, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0063] In the example embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0 < |(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.065. Preferably, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.026. Controlling the range of this relationship results in a high angular refractive index in the central region of the optical lens, which is beneficial to improving the imaging effect in the central region.

[0064] In the example implementation, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the following condition: 0.05 ≤ BFL / TTL ≤ 0.185. Preferably, 0.069 ≤ BFL / TTL ≤ 0.144. By controlling the range of this relationship, while satisfying miniaturization, a certain amount of space is left for the back end to achieve low sensitivity.

[0065] In the example implementation, the focal length F of the entire optical lens assembly and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.2 ≤ F / H ≤ 2.2. Preferably, 1.441 ≤ F / H ≤ 1.973. By controlling the range of this relationship, the optical lens possesses telephoto and large-area characteristics, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0066] In the example embodiment, the focal length F of the entire optical lens assembly and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.35 ≤ F / ENPD ≤ 1.7. Preferably, 1.4 ≤ F / ENPD ≤ 1.7. By controlling the range of this relationship, the optical lens has a larger aperture, which can adapt to low-light environments during use.

[0067] In the example embodiment, the focal length F of the entire optical lens assembly, 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: 0.1 ≤ F / ENPD / D11 × 1mm ≤ 0.175. Preferably, 0.125 ≤ F / ENPD / D11 × 1mm ≤ 0.157. By controlling the range of this relationship, a larger aperture can be obtained while ensuring a smaller front aperture.

[0068] In the example implementation, the effective aperture diameter (DST) of the aperture stop and the total focal length (F) of the optical lens satisfy the following condition: 0.4 ≤ DST / F ≤ 0.7. Preferably, 0.468 ≤ DST / F ≤ 0.62. By controlling the range of this relationship, a larger ratio of aperture stop diameter to total focal length results in a larger optical lens aperture.

[0069] In the example embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1. Preferably, 0.943≤(H / 2) / (F×tan(θ / 2))≤0.994. By controlling the range of this relationship, the edge distortion of the optical lens is small, resulting in a large angular resolution for each field of view and good image resolution for each field of view.

[0070] In the example embodiment, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 1 ​​≤ F1 / F ≤ 2.8. Preferably, 1.104 ≤ F1 / F ≤ 2.263. By controlling the range of this relationship, the first lens, as the first lens element of the optical lens, plays a crucial role in controlling its focal length within a certain range, thus affecting spherical aberration, field curvature, and illuminance. Simultaneously, the optical power of the first lens influences the overall lens distribution of the subsequent group, contributing to the miniaturization and low sensitivity of the optical lens.

[0071] In the example implementation, the focal length F of the entire optical lens assembly and the focal length F2 of the second lens satisfy: -2 ≤ F / F2 < 0. Preferably, -1.675 ≤ F / F2 ≤ -0.031. By controlling the range of this relationship, the negative second lens has a smaller optical power. Because there is a negative third lens behind it that can bear the divergence pressure, it can avoid the light from diverging sharply after passing through the positive first lens, thus avoiding a large amount of aberration. This helps to reduce the sensitivity of the optical lens and improve imaging stability.

[0072] In the example embodiment, the focal length F of the entire optical lens group and the focal length F3 of the third lens satisfy: -1.9 ≤ F / F3 < 0. Preferably, -1.65 ≤ F / F3 ≤ -0.031. By controlling the range of this relationship, the third lens is another negative after the second negative lens. By controlling the negative optical power of the third lens to be relatively small, the third lens acts as a weak negative lens, slightly diverging the light beam. This allows the light to fill the entrance pupil, ensuring a large aperture. At the same time, the third lens acts as a buffer lens for the light path, preventing the lens processing difficulty and assembly sensitivity caused by excessive differences in optical power and excessive curvature between adjacent lenses.

[0073] In the example implementation, the maximum field of view (DFOV) of the optical lens satisfies: 25° ≤ DFOV ≤ 45°. Preferably, 28.5999 ≤ DFOV / 1° ≤ 40.3950. Controlling the range of this relationship ensures that the optical lens has a sufficient lateral field of view, effectively avoiding blind spots around curves, merging points, and road signs, as well as preventing problems such as ranging deviation, increased distortion, and edge illumination attenuation caused by an excessively large field of view. DFOV can be the maximum field of view when the optical lens is paired with an imaging chip with a diagonal size of 9.25mm.

[0074] In the example implementation, the total optical length (TTL) of the optical lens satisfies: 25 ≤ TTL / 1mm ≤ 38. Preferably, 27.9999 ≤ TTL / 1mm ≤ 34.0008. Controlling this range allows sufficient space for the optical lens to arrange the first to sixth lenses, enabling accurate correction of field curvature, chromatic aberration, distortion, etc., and achieving a high modulation transfer function at long object distances. When the total optical length is excessively compressed, it leads to crowded lens arrangement, making it difficult to allocate positive and negative optical powers, resulting in poor far-field edge resolution and a larger error in the telephoto distance calculation of the optical lens.

[0075] In the example embodiment, the focal length F4 of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: 0.9 ≤ F4 / F ≤ 2. Preferably, 0.9 ≤ F4 / F ≤ 1.75. Further, 0.954 ≤ F4 / F ≤ 1.525. By controlling the range of this relationship, when the second and third lenses are two consecutive negatives, the fourth lens can bear most of the converging pressure, not only suppressing the aperture and total optical length, but also allowing the light to converge slowly in the rear, achieving long focal length and low sensitivity.

[0076] In the example embodiment, the focal length F5 of the fifth lens and the focal length F of the entire optical lens group satisfy: 0.55≤F5 / F≤1.5. Preferably, 0.6≤F5 / F≤1.25. Further, 0.801≤F5 / F≤1.131. Controlling the range of this relationship can efficiently converge the beam, compress the rear optical path size, and achieve compact optical lens; it can also coordinate the field curvature and chromatic aberration of each lens, disperse the convergence load of the optical lens, and improve the full field of view imaging performance.

[0077] In the example embodiment, the central radius of curvature R51 of the first side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens assembly: 0.3 ≤ R51 / F ≤ 1.25. Preferably, 0.532 ≤ R51 / F ≤ 0.797. By controlling the range of this relationship, the first side surface of the fifth lens is used to compensate for axial chromatic aberration and edge magnification chromatic aberration remaining on the concave surface of the front lens, thereby improving the overall imaging quality.

[0078] In the example implementation, the central radius of curvature R51 of the first side surface of the fifth lens and the central radius of curvature R42 of the second side surface of the fourth lens satisfy: R51 < |R42|. By controlling the range of this relationship, the light beam exits the second side surface of the fourth lens at a gentle angle and enters the air gap and the first side surface of the fifth lens. This allows for the adjustment of the principal ray height, optimization of field curvature and astigmatism balance, and improvement of resolution.

[0079] In the example implementation, the center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy: 0.025≤CT6 / F≤0.22. Preferably, 0.045≤CT6 / F≤0.054. Controlling the range of this relationship is beneficial for miniaturization and does not add much aberration burden, thus improving the MTF across the entire field of view.

[0080] In the example implementation, the maximum center thickness CTmax and the minimum center thickness Ctmin of the third to fifth lenses satisfy: 1 ​​≤ CTmax / Ctmin ≤ 3.2. Preferably, 1.048 ≤ CTmax / Ctmin ≤ 2.983. Controlling the range of this relationship ensures that the center thicknesses of the third, fourth, and fifth lenses are similar, which is beneficial for the even distribution of the optical path length among these three lenses, preventing any single lens from accumulating a large amount of high-order aberrations, dispersing the correction pressure, and making it easier to achieve MTF balance across the entire field of view. Simultaneously, because the negative third lens has a small optical power, while the positive fourth and fifth lenses have large optical power, the thermal difference compensation among the three lenses can be more accurate when the temperature changes, preventing any single lens from experiencing particularly drastic temperature drift, thus meeting the stable imaging requirements of automotive optical lenses from -40℃ to 125℃.

[0081] In the example implementation, the focal length F of the entire optical lens group and the focal length F6 of the sixth lens satisfy: -1.8 ≤ F / F6 ≤ 0.2. Preferably, -1.4 ≤ F / F6 ≤ -0.7. Further, -1.237 ≤ F / F6 ≤ -0.83. The sixth lens bears the aberration pressure generated by the static front, and the imaging quality can be improved by controlling the range of this relationship; when the sixth lens is a negative, it can balance aberrations and control the point of light incident on the image plane, thereby improving the sensor imaging quality.

[0082] In the example embodiment, the sag SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens and the sag SAG51 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens satisfy: -1.4 ≤ SAG42 / SAG51 ≤ 0.22. Preferably, -0.85 ≤ SAG42 / SAG51 ≤ -0.4. Further, -0.754 ≤ SAG42 / SAG51 ≤ -0.49. Controlling the range of this relationship can balance the degree of deflection of the central ray and the edge ray, avoid excessive bending of the edge ray, and avoid the generation of advanced spherical aberration and coma. When the sag directions are opposite (i.e., the values ​​of SAG42 and SAG51 are opposite in sign), the light is converged at two deflection angles that are close to each other, which helps to reduce sensitivity and improve imaging stability.

[0083] In the example embodiment, the single-sided focal length FR51 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy the following condition: 1.2 ≤ FR51 / F ≤ 2.7. Preferably, 1.3 ≤ FR51 / F ≤ 2. Further, 1.4 ≤ FR51 / F ≤ 1.891. By controlling the range of this relationship, the light deflection and converging ability is stronger, which is conducive to more light rays smoothly transitioning to the rear, thereby increasing the light transmission of the optical lens. Here, FR51 represents the single-sided focal length of the first side of the fifth lens when light enters the glass medium from air.

[0084] In the example embodiment, the single-sided focal length FR42 of the second side of the fourth lens and the overall focal length F of the optical lens assembly satisfy: -6 ≤ FR42 / F ≤ 2.4. Preferably, 1 ≤ FR42 / F ≤ 2.2. Further, 1.23 ≤ FR42 / F ≤ 1.988. By controlling the range of this relationship, the optical path length of the light rays in the central and peripheral fields of view can be adjusted, optimizing the imaging quality at the edges while avoiding unnecessary impact on the light rays in the central field of view. When FR42 is positive, it can cooperate with the convex surface of the first side of the rear fifth lens to reduce the light sensitivity at that location. FR42 represents the single-sided focal length of the second side of the fourth lens when light exits from the glass medium to the air medium.

[0085] In the example implementation, the optical lens satisfies the following conditions: 1≤F1 / F≤2.8, -2≤F / F2<0, -1.9≤F / F3<0, 0.9≤F4 / F≤2, 0.55≤F5 / F≤1.5, and -1.8≤F / F6≤0.2. By controlling the range of the above relationships, the positive and negative pairing of the first and second lenses can achieve long focal lengths, continuous double negative polarity of the second and third lenses, and balanced image distribution and correction of optical power by the fourth and fifth lenses. The sixth lens can be either positive or negative, acting as a flexible balancing element. Furthermore, the negative focal power of the second and third lenses, and the positive focal power of the fourth and fifth lenses, can form a functional separation, constituting an optical power reversal node. The joint constraint of the above relationships achieves the simultaneous consideration of spherical aberration balance, chromatic aberration control, distortion suppression, 8-megapixel high resolution, and miniaturization. Under the constraint of an all-glass spherical surface, the above collaborative architecture achieves joint correction of multiple aberrations solely through the focal length ratio of the spherical lenses.

[0086] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the six 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.

[0087] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0088] 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 includes, in sequence from the first side to the second side along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0089] The first lens L1 has positive optical power, and its first side surface S1 is convex, and its second side surface S2 is convex.

[0090] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0091] The third lens L3 has negative optical power, and its first side surface S5 is concave, and its second side surface S6 is concave.

[0092] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0093] The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0094] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0095] 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 onto 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 protective glass L7 is provided between the sixth lens L6 and the image plane IMA. The protective glass L7 has a first side surface S13 and a second side surface S14. Table 1 shows the basic parameters of the optical lens of Embodiment 1.

[0096] Table 1. Basic parameters of the optical lens in Example 1

[0097] Depend on Figure 21It can be seen that, at a spatial frequency of 119 lp / mm (line pairs / millimeter), the optical lens of Example 1 can achieve an MTF peak value of over 0.7 in the 0° center field of view, an MTF peak value of over 0.4 in the 11° field of view, and an MTF peak value of over 0.3 in the edge field of view, and the imaging quality of each field of view is good. Figure 21 In this context, "T" represents the meridional / tangential direction. The optical lens of Example 1 can achieve eight million or even ten million pixels. Figure 22 In the diagram, the black dashed line represents the baseline where the distortion value is 0. (From...) Figure 22 It can be seen that the optical lens of Example 1 exhibits less distortion at the edge of the field of view, which is beneficial for having a large angular resolution in all fields of view and high imaging quality in all fields of view. Figure 23 It can be seen that the optical lens of Example 1 can achieve a relative illumination of over 50% at the edge field of view, and the image brightness of the optical lens is highly consistent, resulting in more uniform and clear imaging across all fields of view. Figure 23 In optical design, the Y direction (or Y-axis) is a vertical direction (or vertical axis) that follows the right-hand rule and is orthogonal to the Z-axis (optical axis).

[0098] 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 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 2 shows the basic parameters of the optical lens of Embodiment 2.

[0099] Table 2 Basic parameters of the optical lens in Example 2

[0100] The optical lens of Example 2 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 2 can achieve eight million or even ten million pixels. The optical lens of Example 2 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 2 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0101] Example 3 The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3As 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 first side surface S3 of the second lens L2 is convex, and the second side surface S4 is concave. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0102] Table 3. Basic parameters of the optical lens in Example 3

[0103] The optical lens of Example 3 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 3 can achieve eight million or even ten million pixels. The optical lens of Example 3 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 3 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0104] 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; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is concave; and the first side surface S5 of the third lens L3 is convex. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0105] Table 4. Basic parameters of the optical lens in Example 4

[0106] The optical lens of Example 4 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 4 can achieve eight million or even ten million pixels. The optical lens of Example 4 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 4 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0107] Example 5 The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 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; while the first side surface S5 of the third lens L3 is convex. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0108] Table 5. Basic parameters of the optical lens in Example 5

[0109] The optical lens of Example 5 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 5 can achieve eight million or even ten million pixels. The optical lens of Example 5 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 5 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0110] 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; the second side surface S2 of the first lens L1 is concave; the second side surface S4 of the second lens L2 is concave; the second side surface S6 of the third lens L3 is convex; and the second side surface S10 of the fifth lens L5 is convex. Table 6 shows the basic parameters of the optical lens of Embodiment 6.

[0111] Table 6 Basic parameters of the optical lens in Example 6

[0112] The optical lens of Example 6 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 6 can achieve eight million or even ten million pixels. The optical lens of Example 6 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 6 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0113] 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; and the first side surface S7 of the fourth lens L4 is concave. Table 7 shows the basic parameters of the optical lens of Embodiment 7.

[0114] Table 7 Basic parameters of the optical lens in Example 7

[0115] The optical lens of Example 7 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 7 can achieve eight million or even ten million pixels. The optical lens of Example 7 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 7 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0116] 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 second side surface S4 of the second lens L2 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 convex. Table 8 shows the basic parameters of the optical lens of Embodiment 8.

[0117] Table 8 Basic parameters of the optical lens in Example 8

[0118] The optical lens of Example 8 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 8 can achieve eight million or even ten million pixels. The optical lens of Example 8 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 8 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0119] 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; and the second side surface S10 of the fifth lens L5 is a convex surface. Table 9 shows the basic parameters of the optical lens of Embodiment 9.

[0120] Table 9. Basic parameters of the optical lens in Example 9

[0121] The optical lens of Example 9 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 9 can achieve eight million or even ten million pixels. The optical lens of Example 9 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 9 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0122] 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 S10 of the fifth lens L5 is convex; and the second side surface S12 of the sixth lens L6 is concave. Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0123] Table 10 Basic parameters of the optical lens in Example 10

[0124] The optical lens of Example 10 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 10 can achieve eight million or even ten million pixels. The optical lens of Example 10 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 10 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0125] 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 first side surface S3 of the second lens L2 is convex and the second side surface S4 is concave; the second side surface S10 of the fifth lens L5 is convex; and the sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave. Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0126] Table 11 Basic parameters of the optical lens in Example 11

[0127] The optical lens of Example 11 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 11 can achieve eight million or even ten million pixels. The optical lens of Example 11 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 11 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0128] 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 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 12 shows the basic parameters of the optical lens of Embodiment 12.

[0129] Table 12 Basic parameters of the optical lens in Example 12

[0130] The optical lens of Example 12 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 12 can achieve eight million or even ten million pixels. The optical lens of Example 12 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 12 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0131] 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 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 13 shows the basic parameters of the optical lens of Embodiment 13.

[0132] Table 13 Basic parameters of the optical lens in Example 13

[0133] The optical lens of Example 13 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 13 can achieve eight million or even ten million pixels. The optical lens of Example 13 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 13 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0134] 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 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 14 shows the basic parameters of the optical lens of Embodiment 14.

[0135] Table 14 Basic parameters of the optical lens in Example 14

[0136] The optical lens of Example 14 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 14 can achieve eight million or even ten million pixels. The optical lens of Example 14 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 14 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0137] Example 15 The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 15 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 15 shows the basic parameters of the optical lens of Embodiment 15.

[0138] Table 15 Basic parameters of the optical lens in Example 15

[0139] The optical lens of Example 15 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 15 can achieve eight million or even ten million pixels. The optical lens of Example 15 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 15 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0140] 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; and the second side surface S4 of the second lens L2 is concave; while the second side surface S10 of the fifth lens L5 is convex. Table 16 shows the basic parameters of the optical lens of Embodiment 16.

[0141] Table 16 Basic parameters of the optical lens in Example 16

[0142] The optical lens of Example 16 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 16 can achieve eight million or even ten million pixels. The optical lens of Example 16 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 16 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0143] 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; and the first side surface S7 of the fourth lens L4 is concave; while the second side surface S10 of the fifth lens L5 is convex. Table 17 shows the basic parameters of the optical lens of Embodiment 17.

[0144] Table 17 Basic parameters of the optical lens in Example 17

[0145] The optical lens of Example 17 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 17 can achieve eight million or even ten million pixels. The optical lens of Example 17 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 17 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0146] 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; and the second side surface S2 of the first lens L1 is concave. Table 18 shows the basic parameters of the optical lens of Embodiment 18.

[0147] Table 18 Basic parameters of the optical lens in Example 18

[0148] In this embodiment, the second side surface S6 of the third lens L3 and the first side surface S7 of the fourth lens L4 are both spherical. Their surface shapes are opposite, their absolute values ​​of central curvature radii are close, and the central air gap between the two sides is small, which has a tendency to bond together. Therefore, bonding can be selected.

[0149] The optical lens of Example 18 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 18 can achieve eight million or even ten million pixels. The optical lens of Example 18 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 18 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0150] 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; and the second side surface S2 of the first lens L1 is concave. An IR filter L8 is disposed between the sixth lens L6 and the protective glass L7, and the IR filter L8 has a first side surface S15 and a second side surface S16. Table 19 shows the basic parameters of the optical lens of Embodiment 19.

[0151] Table 19 Basic parameters of the optical lens in Example 19

[0152] The optical lens of Example 19 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 19 can achieve eight million or even ten million pixels. The optical lens of Example 19 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 19 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness consistency and more uniform and clear imaging across all fields of view.

[0153] Example 20 The following is for reference Figure 20 Describes an optical lens according to Embodiment 20 of this application. For example... Figure 20 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 concave; and the second side surface S10 of the fifth lens L5 is convex. Table 20 shows the basic parameters of the optical lens of Embodiment 20.

[0154] Table 20 Basic parameters of the optical lens in Example 20

[0155] The optical lens of Example 20 achieves a peak MTF of over 0.7 in the 0° center field of view, over 0.3 in the 11° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm (line pairs / mm), exhibiting good image quality across all fields of view. The optical lens of Example 20 can achieve eight million or even ten million pixels. The optical lens of Example 20 exhibits less distortion in the edge field of view, which is beneficial for achieving high angular resolution and high image quality in all fields of view. The optical lens of Example 20 achieves a relative illumination of over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view.

[0156] Tables 21-1 and 21-2 provide the basic parameters of the optical lenses in Examples 1-20, such as F, ENPD, TTL, DFOV, θ, H, BFL, DST, DMAX, D11, D12, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, SAG42, SAG51, FR42, FR51, CTmax, and Ctmin. 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, D42 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, D51 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D52 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, D61 is the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, and D62 is the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens.

[0157] Table 21-1 Basic parameters of the optical lenses in Examples 1-10

[0158] Table 21-2 Basic parameters of the optical lenses in Examples 11-20

[0159] In summary, the relationships in each embodiment of Examples 1-20 satisfy the relationships shown in Tables 22-1 and 22-2.

[0160] Table 22-1 Relationships in Examples 1-10

[0161] Table 22-2 Relationships in Examples 11-20

[0162] 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), and 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.

[0163] 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 negative optical power; A third lens with negative optical power; A fourth lens with positive optical power; The fifth lens with positive optical power has a convex first side surface; A sixth lens with optical power; The optical lens has six lenses with optical power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all glass spherical lenses; The optical lens satisfies the following relationships: -1.8≤F / F6≤0.2, 1.35≤F / ENPD≤1.7, 1.4≤TTL / F≤2.7, 1≤F1 / F≤2.8, 0.9≤F4 / F≤2 and 0.55≤F5 / F≤1.5; Wherein, F is the focal length of the entire optical lens group, F6 is the focal length of the sixth lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F1 is the focal length of the first lens, F4 is the focal length of the fourth lens, and F5 is the focal length of the fifth lens.

2. 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 convex. The first side surface of the second lens is concave, and the second side surface is concave; or, the first side surface of the second lens is concave, and the second side surface is convex; or, the first side surface of the second lens is convex, and the second side surface is concave. The first side of the third lens is convex and the second side is concave; or, the first side of the third lens is concave and the second side is concave; or, the first side of the third lens is concave and the second side is convex. The first side surface of the fourth lens is convex, and the second side surface is convex; or, the first side surface of the fourth lens is concave, and the second side surface is convex; or, the first side surface of the fourth lens is convex, and the second side surface is concave. The second side surface of the fifth lens is concave; or, the second side surface of the fifth lens is convex. The sixth lens has negative optical power, and the first side of the sixth lens is concave and the second side is convex; or, the sixth lens has negative optical power, and the first side of the sixth lens is concave and the second side is concave; or, the sixth lens has positive optical power, and the first side of the sixth lens is convex and the second side is concave.

3. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F2 of the second lens satisfies the following condition with the focal length F of the entire optical lens group: -2≤F / F2<0.

4. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F of the entire optical lens assembly and the focal length F3 of the third lens satisfy the condition: -1.9 ≤ F / F3 < 0.

5. The optical lens according to any one of claims 1 to 2, characterized in that, The central curvature radius R51 of the first side surface of the fifth lens and the central curvature radius R42 of the second side surface of the fourth lens satisfy: R51 < |R42|.

6. The optical lens according to any one of claims 1 to 2, characterized in that, The center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy the following condition: 0.025≤CT6 / F≤0.

22.

7. The optical lens according to any one of claims 1 to 2, characterized in that, The maximum value CTmax of the center thickness from the third lens to the fifth lens and the minimum value Ctmin of the center thickness from the third lens to the fifth lens satisfy: 1≤CTmax / Ctmin≤3.

2.

8. The optical lens according to any one of claims 1 to 2, characterized in that, The sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42, and the sag of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, SAG51, satisfy the following condition: -1.4≤SAG42 / SAG51≤0.

22.

9. The optical lens according to any one of claims 1 to 2, characterized in that, The single-sided focal length FR51 of the first side of the fifth lens and the focal length F of the entire optical lens group satisfy: 1.2≤FR51 / F≤2.

7.

10. The optical lens according to any one of claims 1 to 2, characterized in that, The maximum field of view (DFOV) of the optical lens, the focal length (F) of the entire optical lens group, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50 ≤ (DFOV × F) / H / 1° ≤ 65.

11. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F of the entire optical lens group, 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: 0.6≤(F×θ) / D11 / 1rad≤1.

2.

12. The optical lens according to any one of claims 1 to 2, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0<|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.

065.

13. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F of the entire optical lens assembly and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.2≤F / H≤2.

2.

14. The optical lens according to any one of claims 1 to 2, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.

1.

15. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following relationships: 25≤TTL / 1mm≤38, 4≤TTL / H / θ×1rad≤7.5, 2.2≤TTL / DMAX≤3.5, 1.2≤D11 / H / θ×1rad≤2.75, 0.01≤D11 / H / F×1mm≤0.2, 0.05≤BFL / TTL≤0.185, 0.1≤F / ENPD / D11×1mm≤0.175, 0.4≤DST / F≤0.7, 0.3≤R51 / F≤1.25 or -6≤FR42 / F≤2.4; Wherein, H is the image height 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, DMAX is the maximum value among the maximum apertures of each lens corresponding to 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, DST is the effective aperture of the aperture stop, R51 is the center radius of curvature of the first side of the fifth lens, and FR42 is the image-side focal length of the second side of the fourth lens.

16. The optical lens according to any one of claims 1 to 2, characterized in that, The maximum field of view (DFOV) of the optical lens satisfies: 25°≤DFOV≤45°.

17. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.9≤F4 / F≤1.75, 0.6≤F5 / F≤1.25, -1.4≤F / F6≤-0.7, -0.85≤SAG42 / SAG51≤-0.4, 1.3≤FR51 / F≤2 or 1≤FR42 / F≤2.2; Wherein, SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG51 is the sag of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, FR51 is the image-side focal length of the first side of the fifth lens, and FR42 is the image-side focal length of the second side of the fourth lens.

18. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following relationships: 56.317≤(DFOV×F) / H / 1°≤58.831, 1.789≤TTL / F≤2.282, 4.666≤TTL / H / θ×1rad≤7.069, 2.593≤ TTL / DMAX≤3.148, 0.799≤(F×θ) / D11 / 1rad≤0.88, 1.656≤D11 / H / θ×1rad≤2.468, 0.067≤D11 / H / F×1mm≤0.088, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.026, 0.069≤BFL / TT L≤0.144, 1.441≤F / H≤1.973, 1.4≤F / ENPD≤1.7, 0.125≤F / ENPD / D11×1mm≤0.157, 0.468≤DST / F≤ 0.62, 0.943≤(H / 2) / (F×tan(θ / 2))≤0.994, 1.104≤F1 / F≤2.263, -1.675≤F / F2≤-0.031, -1.65 ≤F / F3≤-0.031, 0.954≤F4 / F≤1.525, 0.801≤F5 / F≤1.131, 0.532≤R51 / F≤0.797, 0.045≤CT6 / F≤0 .054, 1.048≤CTmax / Ctmin≤2.983, -1.237≤F / F6≤-0.83, -0.754≤SAG42 / SAG51≤-0.49, 1.4≤FR51 / F≤1.891, 1.23≤FR42 / F≤1.988, 27.9999≤TTL / 1mm≤34.0008 or 28.5999≤DFOV / 1°≤40.3950; Wherein, DFOV 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, θ is the radian value of 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, 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, 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 R51 is the first side of the fifth lens. The center radius of curvature of the surface, CT6 is the center thickness of the sixth lens, CTmax is the maximum center thickness of the third to fifth lenses, Ctmin is the minimum center thickness of the third to fifth lenses, SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG51 is the sag of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, FR51 is the image-side focal length of the first side of the fifth lens, and FR42 is the image-side focal length of the second side of 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