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 along an optical axis from a first side to a second side: a first lens with negative optical power, the first side of which is a concave surface; a second lens with positive optical power, the second side of which is a convex surface; a third lens with positive optical power, the first side of which is a convex surface; a fourth lens with negative optical power, the second side of which is a concave surface; a fifth lens with positive optical power, the first side of which is a convex surface, and the second side of which is a convex surface; and a sixth lens with negative optical power, the first side of which is a concave surface. The number of lenses with optical 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 full-glass spherical lenses. The optical lens has high light flux and a large aperture number, high resolving power, high imaging quality and high stability, and can be miniaturized.

Description

Technical Field

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

[0002] With the advancement of intelligent driving technology, advanced intelligent driving has gradually entered the public eye, and the solutions for intelligent driving are relatively open and transparent, namely visual perception and radar technology. Automotive optical lenses play a crucial role in long-distance detection and high-performance visual imaging, maintaining stable and efficient performance output even in low-cost, small-space, and harsh environments. For example, on highways, the forward-facing camera of an Advanced Driver-Assistance System (ADAS) can automatically determine distance to other vehicles, perform timely braking and acceleration, or achieve automatic lane changing and collision warning.

[0003] With technological advancements and fierce industry competition, high-performance, cost-effective lenses are currently key to breaking through the current limitations. In optical lenses, the more complex the lens surface shape, the greater the degree of freedom 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 additional variables depending on the expression, making aspherical designs more likely to offer better performance than spherical designs. Under the design requirement of cost reduction, achieving the imaging requirements of optical lenses containing aspherical lenses using an all-glass spherical lens is a goal pursued by those skilled in the art.

[0004] Furthermore, existing automotive optical lenses struggle to simultaneously meet the diverse demands of miniaturization, large aperture, and high light throughput, making it impossible to achieve a balance between low cost and high performance. Moreover, harsh environments impose greater limitations on materials and structures, which exacerbate the trend of declining resolution and sensitivity in automotive optical lenses. 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 the optical axis from a first side to a second side: a first lens with negative optical power, the first side of which is concave; a second lens with positive optical power, the second side of which is convex; a third lens with positive optical power, the first side of which is convex; a fourth lens with negative optical power, the second side of which is concave; a fifth lens with positive optical power, the first side of which is convex and the second side of which is convex; and a sixth lens with negative optical power, the first side of which is concave; the number of lenses with optical power in the optical lens is six; the first, second, third, fourth, fifth, and sixth lenses are all all-glass spherical lenses; the optical lens satisfies the following relationship: 1.3 5≤F / ENPD≤1.7, 1.5≤TTL / F≤2.7, 0.85≤F3 / F≤1.6, -0.8≤F4 / F<0, 0.45≤F5 / F≤0.8, 0.95≤FR31 / F≤1.85, and 1≤Ctmax / Ctmin≤4.5; where F is the focal length of the entire optical lens group, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, FR31 is the image-side focal length of the first side of the third lens, Ctmax is the maximum value of the center thickness from the third lens to the fifth lens, and Ctmin is the minimum value of the center thickness from the third lens to the fifth lens.

[0007] According to an exemplary embodiment of this application, the second side surface of the first lens is convex; or, the second side surface of the first lens is concave; the first side surface of the second lens is convex; or, the first side surface of the second lens is concave; the second side surface of the third lens is concave; or, the second side surface of the third lens is convex; the first side surface of the fourth lens is convex; or, the first side surface of the fourth lens is concave; the second side surface of the sixth lens is convex; or, the second side surface of the sixth lens 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; DMAX is the maximum value among the maximum aperture values ​​of all lenses corresponding to the maximum field of view of the optical lens; θ is the radian value of the maximum field of view of the optical lens; D11 is the maximum aperture 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; F1 is the focal length of the first lens; F2 is the focal length of the second lens; F6 is the focal length of the sixth lens; R11 is the central radius of curvature of the first side of the first lens; CT1 is the central thickness of the first lens; CT6 is the central thickness of the sixth lens; FR52 is the image-side focal length of the second side of the fifth lens; T45 is the air gap between the fourth and fifth lenses; T56 is the air gap between the fifth and sixth lenses; R31 is the central radius of curvature of the first side of the third lens; R22 is the central radius of curvature of the second side of the second lens. FR31 is the image-side focal length of the first side of the third lens, T34 is the air gap between the third and fourth lenses, R32 is the image-side focal length of the second side of the third lens, SAG22 is the sag of the second side of the second lens corresponding to the maximum field of view of the optical lens, SAG31 is the sag of the first side of the third lens corresponding to the maximum field of view of the optical lens, n is an integer greater than or equal to 1, m = n + 1, D61 is the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD61 / 2n is the sag at half the aperture of the first side of the sixth lens (1 / n), SagD61 / 2m is the sag at half the aperture of the first side of the sixth lens (1 / m), D62 is the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD62 / 2n is the sag at half the aperture of the second side of the sixth lens (1 / n), SagD62 / 2m is the sag at half the aperture of the second side of the sixth lens (1 / m).

[0009] 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: 1.3≤F / H≤2.1.

[0010] 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.

[0011] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the focal length F1 of the first lens satisfy: -1.2≤F / F1<0.

[0012] 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: 0.95≤F2 / F≤2.4.

[0013] According to an exemplary embodiment of this application, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: -1.65≤F6 / F≤-0.85.

[0014] According to an exemplary embodiment of this application, the central curvature radius R11 of the first side of the first lens and the focal length F of the entire optical lens group satisfy: -1.5≤R11 / F≤-0.45.

[0015] According to an exemplary embodiment of this application, the center thickness CT1 of the first lens and the center thickness CT6 of the sixth lens satisfy: 1.2≤CT1 / CT6≤6.8.

[0016] According to an exemplary embodiment of this application, the focal length F5 of the fifth lens, the air gap T45 between the fourth and fifth lenses, and the air gap T56 between the fifth and sixth lenses satisfy: 1≤F5 / (T45+T56)≤2.4.

[0017] According to an exemplary embodiment of this application, the sagitta SAG22 of the second side surface of the second lens corresponding to the maximum field of view of the optical lens and the sagitta SAG31 of the first side surface of the third lens corresponding to the maximum field of view of the optical lens satisfy: -1.3≤SAG22 / SAG31≤-0.2.

[0018] According to an exemplary embodiment of this application, the single-sided focal length FR52 of the second side of the fifth lens and the total focal length F of the optical lens group satisfy: 1.05≤FR52 / F≤2.7.

[0019] According to an exemplary embodiment of this application, the central curvature radius R31 of the first side surface of the third lens, the central curvature radius R22 of the second side surface of the second lens, and the focal length F of the entire optical lens group satisfy: 1.5≤(R31-R22) / F≤3.2.

[0020] According to an exemplary embodiment of this application, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45.

[0021] According to an exemplary embodiment of this application, when the first side surface of the sixth lens is concave, the optical lens satisfies: SagD61 / 2n < SagD61 / 2m; when the second side surface of the sixth lens is concave, the optical lens satisfies: SagD62 / 2n > SagD62 / 2m; when the second side surface of the sixth lens is convex, the optical lens satisfies: SagD62 / 2n < SagD62 / 2m.

[0022] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 50≤(DFOV×F) / H / 1°≤65, 25≤TTL / 1mm≤35, 0.06≤TTL / H / DFOV×1°≤0.15, 2.0≤TTL / DMAX≤3, 0.55≤(F×θ) / D11 / 1rad≤0.95, 0.025≤D11 / H / DFOV×1°≤0.055, 0.07≤BFL / TTL≤0.18, 0.6≤DST / F≤0.95, 0<|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.045, -0.05≤T34 / R32≤0.065 or -2.2≤F3 / F4≤-1.6.

[0023] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 56.423≤(DFOV×F) / H / 1°≤59.223, 1.789≤TTL / F≤2.423, 0.087≤TTL / H / DFOV×1°≤0.123, 2.397≤TTL / DMAX≤2.845, 0.699≤(F×θ) / D11 / 1rad≤0.867, 0.032≤D11 / H / DFOV×1°≤0.0 48. 0.075≤BFL / TTL≤0.169, 1.457≤F / H≤1.973, 1.400≤F / ENPD≤1.700, 0.675≤DST / F≤0.852, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.033, 0.927≤(H / 2) / (F×tan(θ / 2))≤0.994, -0.957≤F / F1≤-0.126 , 1.147≤F2 / F≤1.906, 1.013≤F3 / F≤1.248, -0.666≤F4 / F≤-0.569, 0.588≤F5 / F≤0.694, -1.327≤F6 / F≤-0.850 , -1.024≤R11 / F≤-0.715, 1.333≤CT1 / CT6≤5.714, 1.278≤FR52 / F≤2.397, 1.280≤F5 / (T45+T56)≤1.996, 1.81 6≤(R31-R22) / F≤2.817, 1.079≤FR31 / F≤1.543, -0.010≤T34 / R32≤0.055, -1.024≤SAG22 / SAG31≤-0.309, 29.0023≤TTL / 1mm≤34.7145, 28.6013≤DFOV / 1°≤40.6577, -2.086≤F3 / F4≤-1.749 or 1.042≤Ctmax / Ctmin≤4.131.

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

[0025] The optical lens according to the embodiments of this application employs six lenses with optical power, wherein the first lens has negative optical power, which can smoothly gather large-angle light rays and reduce the light incident angle of the rear lens group. The negative optical power of the first lens can also increase the light transmission, significantly improve the relative illumination at the edges, and ensure that the illumination loss at the four corners of the image is controlled within a certain range. The first side surface of the first lens is concave, which can receive and diverge peripheral light with a smaller aperture, which is beneficial to improving the imaging quality of the optical lens.

[0026] The second lens has positive optical power, collecting light rays that tend to diverge after exiting the first lens and appropriately converging them, which helps to achieve a small aperture. Furthermore, when used in conjunction with the negative optical power lens group of the first lens, it can effectively correct aberrations and improve resolving power. The second side of the second lens is convex, converging the divergent and upward-pointing light rays transmitted from the first side of the second lens, allowing large-angle light rays to smoothly enter the rear, filling the entrance pupil, increasing the light throughput of the optical lens, and achieving a large aperture.

[0027] The third lens has positive optical power, further converging and focusing the light rays emitted from the positive second lens. While maintaining the overall optical length of the small optical lens, this allows the light to converge smoothly at the rear of the lens, reducing rear sensitivity. The first side of the third lens is convex, achieving a second compression and convergence of the light rays, further contributing to miniaturization.

[0028] The fourth lens has negative optical power, which, when paired with the two lenses of positive optical power (the third and fifth lenses), helps correct aberrations and improves resolving power. The second side of the fourth lens is concave, which not only specifically corrects aberrations caused by the convex surface in front, but also moderately diverges the light rays that converge in the front, controlling the optical path difference between the central and peripheral rays. This helps reduce imaging coupling between different wavelengths in different fields of view and balances the field of view resolution.

[0029] The fifth lens has positive optical power, which can correct the residual negative field curvature present in the fourth lens and improve the overall image quality. The first side surface of the fifth lens is convex, and the second side surface of the fifth lens is also convex. The fifth lens, being a double convex surface, continuously converges the effective imaging beam while constraining the propagation angle of scattered stray light, thus reducing the generation of stray ghost images.

[0030] The sixth lens has negative optical power, which softens the tendency of light to continuously converge and adjusts the optical path difference between the central and peripheral fields of view, thus helping to control the principal ray angle incident on the chip surface. The first side of the sixth lens is concave, which can moderately soften the tendency of light to continuously converge, match the converging beam output by the fifth lens, reduce the incident angle of light, and suppress back-end coma and astigmatism.

[0031] The first, second, third, fourth, fifth, and sixth lenses are all 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 is achieved.

[0032] By rationally allocating the power ratio of the six lenses, the lens surface structure, and the center thickness and curvature parameters of each lens on the optical axis, while controlling the overall size and optical ratio of the optical lens, the optical lens can meet the following requirements: 1.35≤F / ENPD≤1.7, 1.5≤TTL / F≤2.7, 0.85≤F3 / F≤1.6, -0.8≤F4 / F<0, 0.45≤F5 / F≤0.8, and 0.95≤FR31 / F≤1.85. This enables a low-cost vehicle-mounted telephoto lens that also achieves a large aperture and low sensitivity.

[0033] 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 number and can adapt to low-light environments during the use of the optical lens.

[0034] The total optical length (TTL) of the optical lens and the focal length (F) of the entire optical lens assembly satisfy the condition: 1.5≤TTL / F≤2.7. This balances the total optical length and focal length of the optical lens, achieving the long focal length and miniaturization characteristics required for the optical lens.

[0035] The focal length F3 of the third lens satisfies the following condition with the focal length F of the entire optical lens group: 0.85≤F3 / F≤1.6. After passing through the second lens, the third lens effectively converges the light path again, compressing the total optical length and lens diameter of the optical lens, which is conducive to the miniaturization of the optical lens.

[0036] The focal length F4 of the fourth lens satisfies the following condition with the overall focal length F of the optical lens group: -0.8 ≤ F4 / F < 0. This moderately raises the height of the rear light rays, broadens the beam, and allows the fifth and sixth lenses to share the light load, balancing the generation of spherical aberration and astigmatism between the front and rear groups. After the fourth lens reshapes the beam trajectory, the rear lenses can independently perform fine correction of residual aberrations, principal ray angles, and distortion, thus improving the image quality of the optical lens.

[0037] The focal length F5 of the fifth lens satisfies the following condition with the overall focal length F of the optical lens group: 0.45≤F5 / F≤0.8. The fifth lens can work in conjunction with the negative lenses before and after it (the fourth and sixth lenses) to achieve field curvature balance and chromatic aberration correction, disperse the convergence load of the optical lens, and improve the imaging performance of the entire field of view.

[0038] The focal length FR31 on the image side of the first side of the third lens satisfies the following condition with the focal length F of the entire optical lens assembly: 0.95 ≤ FR31 / F ≤ 1.85. The smaller positive focal length on the first side of the positive third lens allows for smooth light entry, increasing the light transmission of the optical lens, reducing light loss, and is beneficial for imaging with a large aperture.

[0039] The maximum value of the center thickness Ctmax and the minimum value of the center thickness Ctmin of the third to fifth lenses satisfy: 1≤Ctmax / Ctmin≤4.5. The third, fourth, and fifth lenses are arranged in a positive-negative-positive configuration, and the center thicknesses of these three lenses are close, which can avoid any lens being particularly thick or thin. The light is refracted smoothly from one surface to the other, and the aberration correction burden is more even. This avoids the increase in curvature tolerance sensitivity caused by using small curvature on individual surfaces. Attached Figure Description

[0040] 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 1-15 Schematic diagrams of the optical lenses according to Embodiments 1-15 of this application are shown respectively; Figure 16 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown. Figure 17 A schematic diagram of the distortion of an optical lens according to Embodiment 1 of this application is shown; Figure 18 A schematic diagram of the relative illumination of an optical lens according to Embodiment 1 of this application is shown; Figure 19 A schematic diagram showing the height of the second side of the second lens corresponding to the maximum field of view of the optical lens and the height of the first side of the third lens corresponding to the maximum field of view of the optical lens according to an embodiment of the present application; Figure 20 A schematic diagram of SagD61 / 2n and SagD61 / 2m is shown in the case that the first side of the sixth lens is concave, n is 2, and m is 3, according to an embodiment of the present application. Figure 21 A schematic diagram of SagD62 / 2n and SagD62 / 2m is shown in the embodiment of the present application, where the second side of the sixth lens is convex, n is 2, and m is 3.

[0041] 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; 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 filter L8, and the second side surface S16 of filter L8. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] The features, principles and other aspects of this application are described in detail below.

[0045] 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.

[0046] 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.

[0047] In the example embodiment, the first lens has a negative optical power, which can smoothly gather large-angle light rays and reduce the incident angle of light from the rear lens group. The negative optical power of the first lens can also increase the amount of light transmitted, significantly improve the relative illumination at the edges, and ensure that the illumination loss at the four corners of the image is controlled within a certain range. The first side surface of the first lens is concave, which can receive and diverge peripheral light with a smaller aperture, which is beneficial to improving the imaging quality of the optical lens. The second side surface of the first lens is either convex or concave.

[0048] In the example embodiment, the second lens has positive optical power, collecting the diverging light rays emitted from the first lens and appropriately converging them, which helps to achieve a small aperture. Furthermore, when used in conjunction with the negative optical power lens group of the first lens, it can effectively correct aberrations and improve resolving power. The first side surface of the second lens is either convex or concave. The second side surface of the second lens is convex, converging the diverging and upward-pointing light rays transmitted from the first side surface of the second lens, allowing large-angle light rays to smoothly enter the rear, filling the entrance pupil, increasing the light throughput of the optical lens, and achieving a large aperture.

[0049] In the example embodiment, the third lens has positive optical power, further converging and focusing the light rays emitted from the positive second lens. While maintaining the overall optical length of the small optical lens, this facilitates a smooth convergence of light rays at the rear of the lens, reducing rear-end sensitivity. The first side of the third lens is convex, achieving a second compression and convergence of the light rays, further contributing to miniaturization. The second side of the third lens is either concave or convex.

[0050] In the example implementation, the fourth lens has negative optical power, which, when paired with the two lenses of positive optical power (the third and fifth lenses), helps to correct aberrations and improve resolving power. The first side of the fourth lens is either convex or concave. The second side of the fourth lens is concave, which not only specifically corrects aberrations caused by the convex surface in front, but also moderately diverges the light rays that converge in the front, controlling the optical path difference between the central and peripheral rays. This helps to reduce imaging coupling between different wavelengths in different fields of view and balance the field of view resolution.

[0051] In the example implementation, the fifth lens has positive optical power, which can correct the residual negative field curvature present in the fourth lens in front, thereby improving the overall image quality. The first side surface of the fifth lens is convex, and the second side surface of the fifth lens is also convex. The fifth lens, being biconvex, continuously converges the effective imaging beam while simultaneously constraining the propagation angle of scattered stray light, thus reducing the generation of stray ghost images.

[0052] In the example implementation, the sixth lens has negative optical power, which softens the tendency of light to continuously converge, adjusts the optical path difference between the central and peripheral fields of view, and facilitates control of the chief ray angle (CRA) of light incident on the chip surface. The first side of the sixth lens is concave, which can moderately soften the tendency of light to continuously converge, match the converging beam output from the fifth lens, reduce the angle of incidence, and suppress back-end coma and astigmatism. The second side of the sixth lens is either convex or concave.

[0053] 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.

[0054] In the example implementation, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens are all 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.

[0055] In the example embodiment, the second side surface of the third lens and the first side surface of the fourth lens are both spherical with opposite surface shapes. The absolute values ​​of the central curvature radii are close, and the central air gaps on both sides are small, indicating a tendency to bond. The third lens and the fourth lens can be bonded together as a composite.

[0056] In the example implementation, the second side surface of the fourth lens and the first side surface of the fifth lens are both spherical with opposite surface shapes. The absolute values ​​of the central curvature radii are close, and the central air gaps on both sides are small, indicating a tendency to bond. The fourth lens and the fifth lens can be bonded together as a composite.

[0057] 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.

[0058] 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).

[0059] In the example implementation, the total optical length (TTL) of the optical lens satisfies: 25 ≤ TTL / 1mm ≤ 35. Preferably, 29.0023 ≤ TTL / 1mm ≤ 34.7145. Controlling the TTL range allows the optical lens sufficient space to arrange six global surface glass lenses, enabling precise correction of field curvature, chromatic aberration, and distortion, achieving high MTF at long distances. When the TTL is excessively compressed, it leads to crowded lens arrangement, difficulty in allocating positive and negative optical power, poor far-field edge resolution, and large errors in the telephoto distance calculation of the optical lens.

[0060] In the example implementation, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45. Preferably, 28.6013 ≤ DFOV / 1° ≤ 40.6577. The DFOV can be the maximum field of view when paired with an imaging chip with a diagonal size of 9.25mm. Controlling the range of DFOV ensures that the optical lens has sufficient lateral field of view to avoid blind spots such as curves, merging points, and road signs, while also preventing ranging errors, distortion, and edge dimming caused by an excessively large field of view.

[0061] In the example implementation, the maximum field of view (DFOV) of the optical lens, 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: 50 ≤ (DFOV × F) / H / 1° ≤ 65. Preferably, 56.423 ≤ (DFOV × F) / H / 1° ≤ 59.223. 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.

[0062] 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: 1.5 ≤ TTL / F ≤ 2.7. Preferably, 1.789 ≤ TTL / F ≤ 2.423. 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.

[0063] In the example implementation, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (DFOV) of the optical lens, and the maximum field of view (DFOV) of the optical lens satisfy the following condition: 0.06 ≤ TTL / H / DFOV × 1° ≤ 0.15. Preferably, 0.087 ≤ TTL / H / DFOV × 1° ≤ 0.123. By controlling the range of this relationship, the optical lens can achieve both miniaturization and large-area imaging, meeting the application scenarios of eight million or even ten million pixels.

[0064] In the example implementation, the total optical length (TTL) of the optical lens and the maximum aperture (DMAX) of each lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 2.0 ≤ TTL / DMAX ≤ 3. Preferably, 2.397 ≤ TTL / DMAX ≤ 2.845. 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.

[0065] 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 the following: 0.55 ≤ (F×θ) / D11 / 1rad ≤ 0.95. Preferably, 0.699 ≤ (F×θ) / D11 / 1rad ≤ 0.867. 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 lens, thereby reducing the imaging volume of the optical lens.

[0066] 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 maximum field of view DFOV of the optical lens satisfy the following condition: 0.025 ≤ D11 / H / DFOV × 1° ≤ 0.055. Preferably, 0.032 ≤ D11 / H / DFOV × 1° ≤ 0.048. By controlling the range of this relationship, the optical lens can possess miniaturization and a large target surface, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0067] In the example implementation, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the following condition: 0.07 ≤ BFL / TTL ≤ 0.18. Preferably, 0.075 ≤ BFL / TTL ≤ 0.169. By controlling the range of this relationship, while satisfying miniaturization, a certain amount of space is left for the rear end, thereby achieving low sensitivity of the optical lens.

[0068] 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: 1.3 ≤ F / H ≤ 2.1. Preferably, 1.457 ≤ 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.

[0069] 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, 1.400 ≤ F / ENPD ≤ 1.700. By controlling the range of this relationship, the optical lens has a larger aperture number, which can adapt to low-light environments during the use of the optical lens.

[0070] In the example implementation, the effective aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: 0.6 ≤ DST / F ≤ 0.95. Preferably, 0.675 ≤ DST / F ≤ 0.852. By controlling the range of this relationship, a larger ratio of aperture diameter to total focal length of the optical lens results in a larger aperture number for the optical lens.

[0071] 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)≤0.045. Preferably, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.033. 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.

[0072] In the example implementation, 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, 0.927 ≤ (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.

[0073] In the example embodiment, the focal length F1 of the first lens and the focal length F of the entire optical lens assembly satisfy: -1.2 ≤ F / F1 < 0. Preferably, -0.957 ≤ F / F1 ≤ -0.126. By controlling the range of this relationship, the first lens can effectively collect and smoothly diverge light from various fields of view, increase the light transmission of the optical lens, significantly improve the relative illumination at the edges, ensure illumination loss at the four corners of the image, and benefit the overall telephoto imaging of the optical lens.

[0074] In the example embodiment, the focal length F2 of the second lens and the focal length F of the entire optical lens assembly satisfy: 0.95 ≤ F2 / F ≤ 2.4. Preferably, 1.147 ≤ F2 / F ≤ 1.906. By controlling the range of this relationship, the second lens compresses and collects large-angle light rays from the object side, allowing them to smoothly enter the rear, filling the entrance pupil, increasing the light throughput of the optical lens, and achieving a large aperture.

[0075] In the example embodiment, the focal length F3 of the third lens satisfies the following relationship with the overall focal length F of the optical lens group: 0.85 ≤ F3 / F ≤ 1.6. Preferably, 1.013 ≤ F3 / F ≤ 1.248. By controlling the range of this relationship, after passing through the second lens, the third lens effectively converges the light rays again, compressing the overall optical length and lens aperture of the optical lens, which is beneficial for the miniaturization of the optical lens.

[0076] In the example implementation, the focal length F4 of the fourth lens satisfies the following condition with the overall focal length F of the optical lens group: -0.8 ≤ F4 / F < 0. Preferably, -0.666 ≤ F4 / F ≤ -0.569. By controlling the range of this relationship, the height of the rear light rays is appropriately increased, the beam is stretched, and the light load is distributed among the fifth and sixth lenses, balancing the generation of spherical aberration and astigmatism in the front and rear groups. After the beam trend is reshaped by the divergence of the fourth lens, the rear lenses can independently perform fine correction of residual aberration, CRA, and distortion, thereby improving the imaging quality of the optical lens.

[0077] In the example implementation, the focal length F5 of the fifth lens and the focal length F of the entire optical lens assembly satisfy: 0.45 ≤ F5 / F ≤ 0.8. Preferably, 0.588 ≤ F5 / F ≤ 0.694. By controlling the range of this relationship, the fifth lens can work in conjunction with the preceding and following negative lenses (the fourth and sixth lenses) to achieve field curvature balance and chromatic aberration correction, disperse the convergence load of the optical lens, and improve the full field-of-view imaging performance.

[0078] In the example implementation, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: -1.65≤F6 / F≤-0.85. Preferably, -1.327≤F6 / F≤-0.850. By controlling the range of this relationship, the sixth lens bears the aberration pressure generated by the static front, and while balancing aberrations, it also controls the landing point of light on the image plane, improves the sensor imaging quality, smooths the trend of continuous light convergence, and adjusts the optical path difference between the central field of view and the edge field of view, which is beneficial for controlling the CRA of light incident on the chip surface.

[0079] In the example embodiment, the air gap T34 between the third and fourth lenses and the total optical length TTL of the optical lens satisfy the following condition: 0.045 ≤ T34 / TTL ≤ 0.085. Preferably, 0.053 ≤ T34 / TTL ≤ 0.078. By controlling the range of this relationship, the air gap between the positive power third lens and the negative power fourth lens is very small, allowing the light emitted from the third lens to quickly enter the negative compensation fourth lens. This is beneficial for improving chromatic aberration correction performance, preventing chromatic aberration from being continuously amplified and propagated, and improving image quality.

[0080] In the example embodiment, the central radius of curvature R11 of the first side surface of the first lens and the focal length F of the entire optical lens assembly satisfy: -1.5 ≤ R11 / F ≤ -0.45. Preferably, -1.024 ≤ R11 / F ≤ -0.715. By controlling the range of this relationship, the first side surface of the first lens is concave and relatively curved, which can effectively collect large-angle light from the object side, achieving the requirements of telephoto and large target surface imaging for the vehicle-mounted forward-looking lens.

[0081] In the example implementation, the center thickness CT1 of the first lens and the center thickness CT6 of the sixth lens satisfy: 1.2 ≤ CT1 / CT6 ≤ 6.8. Preferably, 1.333 ≤ CT1 / CT6 ≤ 5.714. Controlling the range of this relationship can improve the overall imaging quality of the optical lens. If the first lens is too thick, and its center thickness is too small, the edge thickness of the first lens will also become drastically thinner. The sag ratio of the first lens will be too large, which will force the incident angle of obliquely incident rays to soar, resulting in a large number of high-order coma and astigmatism. The center thickness of the sixth lens is smaller, which is beneficial for the optical lens to achieve weight reduction and the optical lens has lower temperature drift sensitivity.

[0082] In the example embodiment, the single-sided focal length FR52 of the second side of the fifth lens and the overall focal length F of the optical lens satisfy the following condition: 1.05 ≤ FR52 / F ≤ 2.7. Preferably, 1.278 ≤ FR52 / F ≤ 2.397. FR52 refers to the single-sided focal length of the second side of the fifth lens on the air side when light exits from the glass medium to the air medium. Controlling the range of this relationship is beneficial for further correcting aberrations caused by the concave surface and improving the imaging quality of the optical lens.

[0083] In the example embodiment, the focal length F5 of the fifth lens, the air gap T45 between the fourth and fifth lenses, and the air gap T56 between the fifth and sixth lenses, and the focal length F6 of the sixth lens satisfy: 1 ​​≤ F5 / (T45+T56) ≤ 2.4. Preferably, 1.280 ≤ F5 / (T45+T56) ≤ 1.996. By controlling the range of this relationship, the focal length of the fifth lens in the positive image is relatively small, and while ensuring that the total optical length of the optical lens is controlled, the air gap between the fifth lens and the two preceding and following lenses is relatively large. This is beneficial for correcting aberrations such as field curvature caused by the concave surface, and also enables slow convergence of light, which is beneficial for the long focal length and low sensitivity of the optical lens.

[0084] In the example embodiment, the central radius of curvature R31 of the first side surface of the third lens, the central radius of curvature R22 of the second side surface of the second lens, and the focal length F of the entire optical lens assembly satisfy: 1.5 ≤ (R31-R22) / F ≤ 3.2. Preferably, 1.816 ≤ (R31-R22) / F ≤ 2.817. By controlling the range of this relationship, the second side surface of the second lens and the first side surface of the third lens are two consecutive convex surfaces, and the curvature of the two surfaces is conducive to the compression and convergence of light, allowing the light to fill the entrance pupil, increasing the light transmission of the optical lens, and achieving a large aperture.

[0085] In the example embodiment, the single-sided focal length FR31 of the first side of the third lens and the overall focal length F of the optical lens satisfy the following condition: 0.95 ≤ FR31 / F ≤ 1.85. Preferably, 1.079 ≤ FR31 / F ≤ 1.543. FR31 refers to the single-sided focal length of the first side of the third lens on the glass medium side when light enters from air. By controlling the range of this relationship, a smaller positive focal length of the first side of the positive third lens allows for smooth light entry, increases the light transmission of the optical lens, reduces light energy loss, and is beneficial for imaging with a large aperture.

[0086] In the example embodiment, the air gap T34 between the third and fourth lenses and the center radius of curvature R312 of the second side surface of the third lens satisfy: -0.05 ≤ T34 / R32 ≤ 0.065. Preferably, -0.010 ≤ T34 / R32 ≤ 0.055. By controlling the range of this relationship, the air gap between the positive third lens and the negative fourth lens is moderate, and the second side surface of the third lens is gently sloping, which helps to prevent excessive refraction of light when it exits the third lens and enters the fourth lens, thus reducing sensitivity at this point.

[0087] In the example embodiment, the sagitta SAG22 of the second side surface of the second lens corresponding to the maximum field of view of the optical lens and the sagitta SAG31 of the first side surface of the third lens corresponding to the maximum field of view of the optical lens satisfy: -1.3 ≤ SAG22 / SAG31 ≤ -0.2. Preferably, -1.024 ≤ SAG22 / SAG31 ≤ -0.309. A schematic diagram of SAG22 and SAG31 is shown below. Figure 19 As shown. It should be noted that the sagitta value is positive when the optical axis of the lens runs from the first side to the second side, and negative when it runs in the opposite direction. By controlling the range of this relationship, and controlling the direction and value of the sagitta of the second side of the second lens and the first side of the third lens, the refraction of the central and peripheral rays can be balanced, avoiding excessive bending of the peripheral rays and preventing the generation of advanced spherical aberration and coma. Moreover, the light rays converge at this point with two refraction angles that are close to each other, which helps to reduce the sensitivity of the optical lens and improve imaging stability.

[0088] In the example embodiment, the focal length F3 of the third lens and the focal length F of the fourth lens satisfy: -2.2 ≤ F3 / F4 ≤ -1.6. Preferably, -2.086 ≤ F3 / F4 ≤ -1.749. By controlling the range of this relationship, the third lens acts as a smooth transition light source, while the fourth lens, with its strong negative focal power, helps correct aberrations and field curvature caused by the positive film, improves resolution, and facilitates filling the entrance pupil with light, thus achieving a large aperture.

[0089] In the example implementation, the maximum value Ctmax and the minimum value Ctmin of the center thickness of the third to fifth lenses satisfy: 1 ​​≤ Ctmax / Ctmin ≤ 4.5. Preferably, 1.042 ≤ Ctmax / Ctmin ≤ 4.131. The third, fourth, and fifth lenses are arranged in a positive-negative-positive configuration, controlling the range of this relationship. The center thicknesses of these three lenses are similar, avoiding any lens being particularly thick or thin (which would cause abrupt changes in the light refraction gradient on a single surface, easily exciting higher-order spherical aberrations, coma, higher-order chromatic aberrations, and local field curvature). With similar center thicknesses of the three lenses, the light is refracted smoothly across each surface, resulting in a more even aberration correction burden and avoiding increased curvature tolerance sensitivity caused by using small curvatures on individual surfaces.

[0090] In the example embodiment, when the first side surface of the sixth lens is concave, the optical lens satisfies: SagD61 / 2n < SagD61 / 2m. When the second side surface of the sixth lens is concave, the optical lens satisfies: SagD62 / 2n > SagD62 / 2m. When the second side surface of the sixth lens is convex, the optical lens satisfies: SagD62 / 2n < SagD62 / 2m. Where n is an integer greater than or equal to 1, m = n + 1, D61 is the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD61 / 2n is the sag at half the aperture of the first side of the sixth lens (1 / n), SagD61 / 2m is the sag at half the aperture of the first side of the sixth lens (1 / m), D62 is the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD62 / 2n is the sag at half the aperture of the second side of the sixth lens (1 / n), and SagD62 / 2m is the sag at half the aperture of the second side of the sixth lens (1 / m).

[0091] Since the lens is axially symmetric about the optical axis, SagD61 / 2n can be the sag at a position of 1 / n of the upper (or lower) half of the aperture diameter on the first side of the sixth lens, SagD61 / 2m can be the sag at a position of 1 / m of the upper (or lower) half of the aperture diameter on the first side of the sixth lens, SagD62 / 2n can be the sag at a position of 1 / n of the upper (or lower) half of the aperture diameter on the second side of the sixth lens, and SagD62 / 2m can be the sag at a position of 1 / m of the upper (or lower) half of the aperture diameter on the second side of the sixth lens. As n increases, the position at 1 / n is closer to the optical axis.

[0092] For example, when the first side of the sixth lens is concave, and n is 2 and m is 3, SagD61 / 2n and SagD61 / 2m are as follows: Figure 20 As shown. The directions of SagD61 / 2n and SagD61 / 2m are both along the optical axis of the lens from the second side to the first side, and their values ​​are both negative. When the second side of the sixth lens is convex, and n is 2 and m is 3, SagD62 / 2n and SagD62 / 2m are as follows: Figure 21 As shown. The directions of SagD62 / 2n and SagD62 / 2m are both along the optical axis of the lens from the second side to the first side, and their values ​​are both negative. When the second side of the sixth lens is concave, and n is 2 and m is 3, the directions of SagD62 / 2n and SagD62 / 2m are both along the optical axis of the lens from the first side to the second side, and their values ​​are both positive.

[0093] The control of the sagittal height of the two sides of the sixth lens changes monotonically as the aperture of the two sides of the lens increases. This allows the surface shape of the sixth lens to change slightly and the change in focal length to remain stable when the optical lens is subjected to high or low temperature changes, thereby achieving highly stable imaging under temperature changes.

[0094] In the example implementation, the optical lens satisfies the following conditions: -1.2 ≤ F / F1 < 0, 0.95 ≤ F2 / F ≤ 2.4, 0.85 ≤ F3 / F ≤ 1.6, -0.8 ≤ F4 / F < 0, 0.45 ≤ F5 / F ≤ 0.8, and -1.65 ≤ F6 / F ≤ -0.85. By controlling the range of these relationships, the first lens is negative and the second lens is positive, forming a negative-positive telephoto front group and compressing the overall length. The third lens primarily performs converging imaging. The fourth lens has strong negative focal length, effectively correcting the field curvature caused by the strong positive third lens. The fifth lens, positioned between the fourth and sixth lenses, facilitates aberration compensation. This joint constraint simultaneously achieves the requirements 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-mentioned collaborative architecture achieves joint correction of multiple aberrations solely through the focal length ratio of the spherical lenses.

[0095] 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.

[0096] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0097] 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.

[0098] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0099] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0100] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0101] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0102] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0103] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0104] 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.

[0105] Table 1. Basic parameters of the optical lens in Example 1

[0106] Figure 16 In this context, T represents the meridian / tangential direction. From Figure 16 As can be seen, the optical lens of Example 1 achieves a peak MTF of over 0.6 in the 0° center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the 17.19° edge field of view at a spatial frequency of 119 lp / mm. It has good imaging quality in each field of view, achieving high imaging quality of eight million or even ten million pixels. Figure 17 The example illustrates the distortion values ​​of 436nm wavelength light under different fields of view of the optical lens of Example 1. Figure 17The black dashed line in the middle represents the baseline where the distortion value is 0. From... Figure 17 As can be seen, the optical lens of Example 1 has less distortion at the edge of the field of view, which is beneficial to having a large angular resolution in each field of view and high imaging quality in each field of view. Figure 18 The example illustrates the relative illumination of the optical lens of Embodiment 1 in the Y-direction field of view. The Y-direction is the Y-axis direction of the optical lens's X, Y, and Z axes. From Figure 18 As can be seen, the optical lens of Example 1 can achieve a relative illumination of over 60% (i.e., 0.6) at the edge field of view, exhibiting strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 1 has good imaging quality.

[0107] 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, while the second side surface S6 of the third lens L3 is convex. Table 2 shows the basic parameters of the optical lens of Embodiment 2.

[0108] Table 2 Basic parameters of the optical lens in Example 2

[0109] The optical lens of Example 2 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 2 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 2 possesses excellent image quality.

[0110] Example 3 The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S3 of the second lens L2 is concave. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0111] Table 3. Basic parameters of the optical lens in Example 3

[0112] The optical lens of Example 3 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 3 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 3 possesses excellent image quality.

[0113] 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 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; the second side surface S6 of the third lens L3 is a convex surface. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0114] Table 4. Basic parameters of the optical lens in Example 4

[0115] The optical lens of Example 4 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 4 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 4 possesses excellent image quality.

[0116] 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 first side surface S7 of the fourth lens L4 is a convex surface. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0117] Table 5. Basic parameters of the optical lens in Example 5

[0118] The optical lens of Example 5 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 5 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 5 possesses excellent image quality.

[0119] Example 6 The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S12 of the sixth lens L6 is concave. Table 6 shows the basic parameters of the optical lens of Embodiment 6.

[0120] Table 6 Basic parameters of the optical lens in Example 6

[0121] The optical lens of Example 6 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 6 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 6 possesses excellent image quality.

[0122] 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 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 7 shows the basic parameters of the optical lens of Embodiment 7.

[0123] Table 7 Basic parameters of the optical lens in Example 7

[0124] The optical lens of Example 7 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 7 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 7 possesses excellent image quality.

[0125] 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 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 8 shows the basic parameters of the optical lens of Embodiment 8.

[0126] Table 8 Basic parameters of the optical lens in Example 8

[0127] The optical lens of Example 8 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 8 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 8 possesses excellent image quality.

[0128] 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 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 9 shows the basic parameters of the optical lens of Embodiment 9.

[0129] Table 9. Basic parameters of the optical lens in Example 9

[0130] The optical lens of Example 9 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good imaging quality across all fields of view, achieving high imaging quality at the level of 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 having a large angular resolution and high imaging quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 9 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 9 possesses excellent imaging quality.

[0131] Example 10 The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10 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 10 shows the basic parameters of the optical lens of Embodiment 10.

[0132] Table 10 Basic parameters of the optical lens in Example 10

[0133] The optical lens of Example 10 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 10 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 10 possesses excellent image quality.

[0134] 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 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 11 shows the basic parameters of the optical lens of Embodiment 11.

[0135] Table 11 Basic parameters of the optical lens in Example 11

[0136] The optical lens of Example 11 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 11 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 11 possesses excellent image quality.

[0137] 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.

[0138] Table 12 Basic parameters of the optical lens in Example 12

[0139] The optical lens of Example 12 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 12 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 12 possesses excellent image quality.

[0140] 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.

[0141] Table 13 Basic parameters of the optical lens in Example 13

[0142] The optical lens of Example 13 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 13 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 13 possesses excellent image quality.

[0143] Example 14 The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 14 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and a filter L8 is provided between the sixth lens L6 and the protective glass L7; the filter L8 has a first side surface S15 and a second side surface S16. Table 14 shows the basic parameters of the optical lens of Embodiment 14.

[0144] Table 14 Basic parameters of the optical lens in Example 14

[0145] The optical lens of Example 14 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 14 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 14 possesses excellent image quality.

[0146] Example 15 The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 15As shown, the main 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 15 shows the basic parameters of the optical lens of Embodiment 15.

[0147] Table 15 Basic parameters of the optical lens in Example 15

[0148] The optical lens of Example 15 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.06° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of 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 having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 15 can reach over 60% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 15 possesses excellent image quality.

[0149] Tables 16-1 and 16-2 provide the basic parameters of the optical lenses in Examples 1-15, such as F, ENPD, TTL, DFOV, θ, H, BFL, DST, DMAX, D11, D12, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, SAG22, SAG31, FR52, FR31, Ctmax, and Ctmin. Wherein, D12 is the maximum light-transmitting aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, D21 is the maximum light-transmitting aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens, D22 is the maximum light-transmitting aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens, D31 is the maximum light-transmitting aperture of the first side of the third lens corresponding to the maximum field of view of the optical lens, D32 is the maximum light-transmitting aperture of the second side of the third lens corresponding to the maximum field of view of the optical lens, D41 is the maximum light-transmitting aperture of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, D42 is the maximum light-transmitting aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, D51 is the maximum light-transmitting aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, and D52 is the maximum light-transmitting aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens.

[0150] Table 16-1 Basic parameters of the optical lenses in Examples 1-8

[0151] Table 16-2 Basic parameters of the optical lenses in Examples 9-15

[0152] In summary, the relationships in each embodiment of Examples 1-15 satisfy the relationships shown in Tables 17-1 and 17-2.

[0153] Table 17-1 Relationships in Examples 1-8

[0154] Table 17-2 Relationships in Examples 9-15

[0155] 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.

[0156] 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 negative optical power has a concave first side surface; A second lens with positive optical power has a convex second side surface; The third lens with positive optical power has a convex first side surface; The fourth lens has negative optical power, and its second side surface is concave. A fifth lens with positive optical power has a convex first side and a convex second side. The sixth lens, which has negative optical power, has a concave first side surface; 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 all-glass spherical lenses; The optical lens satisfies the following relationships: 1.35≤F / ENPD≤1.7, 1.5≤TTL / F≤2.7, 0.85≤F3 / F≤1.6, -0.8≤F4 / F<0, 0.45≤F5 / F≤0.8, 0.95≤FR31 / F≤1.85 and 1≤Ctmax / Ctmin≤4.5; Wherein, F is the focal length of the entire optical lens group, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, FR31 is the image-side focal length of the first side of the third lens, Ctmax is the maximum value of the center thickness from the third lens to the fifth lens, and Ctmin is the minimum value of the center thickness from the third lens to the fifth lens.

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

3. 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: 1.3≤F / H≤2.

1.

4. 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.

5. 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 F1 of the first lens satisfy the condition: -1.2≤F / F1<0.

6. 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 respect to the focal length F of the entire optical lens group: 0.95≤F2 / F≤2.

4.

7. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F6 of the sixth lens satisfies the following condition with the focal length F of the entire optical lens group: -1.65≤F6 / F≤-0.

85.

8. The optical lens according to any one of claims 1 to 2, characterized in that, The central radius of curvature R11 of the first side of the first lens and the focal length F of the entire optical lens group satisfy: -1.5≤R11 / F≤-0.

45.

9. The optical lens according to any one of claims 1 to 2, characterized in that, The center thickness CT1 of the first lens and the center thickness CT6 of the sixth lens satisfy the following condition: 1.2≤CT1 / CT6≤6.

8.

10. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F5 of the fifth lens, the air gap T45 between the fourth and fifth lenses, and the air gap T56 between the fifth and sixth lenses satisfy: 1≤F5 / (T45+T56)≤2.

4.

11. The optical lens according to any one of claims 1 to 2, characterized in that, The sag SAG22 of the second side of the second lens corresponding to the maximum field of view of the optical lens and the sag SAG31 of the first side of the third lens corresponding to the maximum field of view of the optical lens satisfy: -1.3≤SAG22 / SAG31≤-0.

2.

12. The optical lens according to any one of claims 1 to 2, characterized in that, The image-side focal length FR52 of the second side of the fifth lens and the focal length F of the entire optical lens group satisfy: 1.05≤FR52 / F≤2.

7.

13. The optical lens according to any one of claims 1 to 2, characterized in that, The central curvature radius R31 of the first side of the third lens, the central curvature radius R22 of the second side of the second lens, and the focal length F of the entire optical lens group satisfy: 1.5≤(R31-R22) / F≤3.

2.

14. 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 / 1° ≤ 45.

15. The optical lens according to any one of claims 1 to 2, characterized in that, When the first side surface of the sixth lens is concave, the optical lens satisfies: SagD61 / 2n < SagD61 / 2m; When the second side surface of the sixth lens is concave, the optical lens satisfies: SagD62 / 2n>SagD62 / 2m; When the second side surface of the sixth lens is convex, the optical lens satisfies: SagD62 / 2n < SagD62 / 2m; Where n is an integer greater than or equal to 1, m = n + 1, D61 is the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD61 / 2n is the sag at half the aperture of the first side of the sixth lens (1 / n), SagD61 / 2m is the sag at half the aperture of the first side of the sixth lens (1 / m), D62 is the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, SagD62 / 2n is the sag at half the aperture of the second side of the sixth lens (1 / n), and SagD62 / 2m is the sag at half the aperture of the second side of the sixth lens (1 / m).

16. 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: 50≤(DFOV×F) / H / 1°≤65, 25≤TTL / 1mm≤35, 0.06≤TTL / H / DFOV×1°≤0.15, 2.0≤TTL / DMAX≤3, 0.55≤(F×θ) / D11 / 1rad≤0.95, 0.025≤D11 / H / DFOV×1°≤0.055, 0.07≤BFL / TTL≤0.18, 0.6≤DST / F≤0.95, 0<|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.045, -0.05≤T34 / R32≤0.065 or -2.2≤F3 / F4≤-1.6; 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, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, 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, T34 is the air gap between the third lens and the fourth lens, and R32 is the image-side focal length of the second side of the third lens.

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: 56.423≤(DFOV×F) / H / 1°≤59.223, 1.789≤TTL / F≤2.423, 0.087≤TTL / H / DFOV×1°≤0.123, 2.397≤TTL / DM AX≤2.845, 0.699≤(F×θ) / D11 / 1rad≤0.867, 0.032≤D11 / H / DFOV×1°≤0.048, 0.075≤BFL / TTL≤0.169, 1.4 57≤F / H≤1.973, 1.400≤F / ENPD≤1.700, 0.675≤DST / F≤0.852, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1 mm-1mm×1rad)≤0.033, 0.927≤(H / 2) / (F×tan(θ / 2))≤0.994, -0.957≤F / F1≤-0.126, 1.147≤F2 / F≤1.906 , 1.013≤F3 / F≤1.248, -0.666≤F4 / F≤-0.569, 0.588≤F5 / F≤0.694, -1.327≤F6 / F≤-0.850, -1.024≤R11 / F≤-0.715, 1.333≤CT1 / CT6≤5.714, 1.278≤FR52 / F≤2.397, 1.280≤F5 / (T45+T56)≤1.996, 1.816≤(R31-R 22) / F≤2.817, 1.079≤FR31 / F≤1.543, -0.010≤T34 / R32≤0.055, -1.024≤SAG22 / SAG31≤-0.309, 29.0023≤TTL / 1mm≤34.7145, 28.6013≤DFOV / 1°≤40.6577, -2.086≤F3 / F4≤-1.749 or 1.042≤Ctmax / Ctmin≤4.131; 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, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, 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, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F6 is the focal length of the sixth lens, R11 is the center radius of curvature of the first side of the first lens, CT1 is the center thickness of the first lens, CT6 is the center thickness of the sixth lens, FR52 T45 is the image-side focal length of the second side of the fifth lens, T56 is the air gap between the fourth and fifth lenses, R31 is the central radius of curvature of the first side of the third lens, R22 is the central radius of curvature of the second side of the second lens, FR31 is the image-side focal length of the first side of the third lens, T34 is the air gap between the third and fourth lenses, R32 is the image-side focal length of the second side of the third lens, SAG22 is the sag of the second side of the second lens corresponding to the maximum field of view of the optical lens, and SAG31 is the sag of the first side of the third lens corresponding to the maximum field of view of the optical lens.

18. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 17; 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