Optical lens and electronic device

Abstract

An optical lens and an electronic device, which belong to the field of optical elements. The optical lens comprises, in order from a first side to a second side along an optical axis, a first lens with positive refractive power, a first side of which is a convex surface; a second lens with negative refractive power, a first side of which is a concave surface and a second side of which is a concave surface; a third lens with positive refractive power, a second side of which is a convex surface; a fourth lens with positive refractive power, a first side of which is a convex surface and a second side of which is a convex surface; a fifth lens with positive refractive power; and a sixth lens with negative refractive power, a first side of which is a concave surface. The number of lenses with refractive power in the optical lens is six. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all full-glass spherical lenses. The number of lenses with refractive power in the optical lens is six. The optical lens has a high light throughput 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. As a visual perception technology solution, onboard optical lenses play a crucial role. For example, in highway driving, the forward-facing camera of an Advanced Driver-Assistance System (ADAS) is used to 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 meet the diverse demands of high pixel count, miniaturization, and large aperture, failing to achieve a balance between low cost and high performance. Moreover, existing automotive optical lenses cannot provide stable performance in harsh environments. Summary of the Invention

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

[0006] The first aspect of this application provides an optical lens comprising, along an optical axis from a first side to a second side, the following components in sequence: a first lens having positive optical power, the first side of which is convex; a second lens having negative optical power, the first side of which is concave and the second side of which is concave; a third lens having positive optical power, the second side of which is convex; a fourth lens having positive optical power, the first side of which is convex and the second side of which is convex; a fifth lens having positive optical power; and a sixth lens having negative optical power, the first side of which is concave. The optical lens has six lenses with optical power; the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens are all all-glass spherical lenses; the optical lens satisfies the following relationships: 1.5≤TTL / F≤2.7, 1.35≤FNO≤1.75, and 0<F / FR42≤0.15; where TTL is the total optical length of the optical lens, FNO is the aperture number of the optical lens, F is the focal length of the entire optical lens group, and FR42 is the image-side focal length of the second side of the fourth lens.

[0007] According to an exemplary embodiment of this application, the second side surface of the first lens is concave; or, the second side surface of the first lens is convex; the first side surface of the third lens is convex; or, the first side surface of the third lens is concave; the first side surface of the fifth lens is convex and the second side surface is concave; or, the first side surface of the fifth lens is concave and the second side surface is convex; or, the first side surface of the fifth lens is convex and the second side surface is convex; 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; θ is the radian value of the maximum field of view of the optical lens; DMAX is the maximum value among the maximum aperture values ​​of all lenses corresponding to the maximum field of view of the optical lens; D11 is the maximum aperture value of the first side of the first lens corresponding to the maximum field of view of the optical lens; ENPD is the entrance pupil diameter of the optical lens; DST is the effective aperture of the aperture stop; F3 is the focal length of the third lens; BFL is the optical back focal length of the optical lens; T12 is the air gap between the first and second lenses; CT2 is the center thickness of the second lens; R22 is the center radius of curvature of the second side of the second lens; R21 is the center radius of curvature of the first side of the second lens; F1 is the focal length of the first lens; F2 is the focal length of the second lens; F4 is the focal length of the fourth lens; F5 is the focal length of the fifth lens; F6 is the focal length of the sixth lens; FR42 is the focal length of the fourth lens. The image-side focal lengths of the two lenses are as follows: FR41 is the image-side focal length of the first side of the fourth lens; FR32 is the image-side focal length of the second side of the third lens; R31 is the central radius of curvature of the first side of the third lens; R32 is the central radius of curvature of the second side of the third lens; R41 is the central radius of curvature of the first side of the fourth lens; R42 is the central radius of curvature of the second side of the fourth lens; CT6 is the center thickness of the sixth lens; T23 is the air gap between the second and third lenses; CT3 is the center thickness of the third lens; SAG31 is the sag of the first side of the third lens corresponding to the maximum field of view of the optical lens; SAG32 is the sag of the second side of the third lens corresponding to the maximum field of view of the optical lens; SAG41 is the sag of the first side of the fourth lens corresponding to the maximum field of view of the optical lens; SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens; CT4 is the center thickness of the fourth lens.

[0009] According to an exemplary embodiment of this application, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 1.2≤F1 / F≤2.4.

[0010] 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: -1.1≤F2 / F≤-0.6.

[0011] According to an exemplary embodiment of this application, the focal length F4 of the fourth lens and the focal length F of the entire optical lens group satisfy: 1≤F4 / F≤1.75.

[0012] According to an exemplary embodiment of this application, the focal length F5 of the fifth lens and the focal length F of the entire optical lens group satisfy: 0.75≤F5 / F≤5.

[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: -1.2≤F6 / F≤-0.45.

[0014] According to an exemplary embodiment of this application, the central curvature radius R42 of the second side surface of the fourth lens satisfies: R42 / 1mm≤-50.

[0015] According to an exemplary embodiment of this application, the focal length F3 of the third lens and the focal length F of the entire optical lens group satisfy: 1≤F3 / F≤2.

[0016] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the single-sided focal length FR41 of the first side of the fourth lens satisfy: 1.5≤FR41 / F≤2.4.

[0017] According to an exemplary embodiment of this application, the single-sided focal length FR32 of the second side of the third lens and the total focal length F of the optical lens group satisfy: 1≤FR32 / F≤2.35.

[0018] According to an exemplary embodiment of this application, the aperture number of the optical lens, the air gap T23 between the second lens and the third lens, and the center thickness CT3 of the third lens satisfy: 0.17≤FNO / (T23+CT3)×1mm≤0.4.

[0019] According to an exemplary embodiment of this application, the focal length F4 of the fourth lens and the central radius of curvature R42 of the second side surface of the fourth lens satisfy: -0.375≤F4 / R42<0.

[0020] According to an exemplary embodiment of this application, the aperture number of the optical lens and the image-side focal length FR42 of the second side of the fourth lens satisfy: 0 <FNO / FR42×1mm≤0.016。

[0021] According to an exemplary embodiment of this application, the air gap T12 between the first lens and the second lens, the air gap T23 between the second lens and the third lens, and the focal length F of the entire optical lens group satisfy: 0.35≤(T12+T23) / F≤0.55.

[0022] According to an exemplary embodiment of this application, the optical lens satisfies the following relationship: R31>|R32| and R42>|R41|; wherein, R31 is the central radius of curvature of the first side surface of the third lens, R32 is the central radius of curvature of the second side surface of the third lens, R41 is the central radius of curvature of the first side surface of the fourth lens, and R42 is the central radius of curvature of the second side surface of the fourth lens.

[0023] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 1.35≤|R31 / R32| and 3.5≤|R42 / R41|; wherein R31 is the central radius of curvature of the first side surface of the third lens, R32 is the central radius of curvature of the second side surface of the third lens, R41 is the central radius of curvature of the first side surface of the fourth lens, and R42 is the central radius of curvature of the second side surface of the fourth lens.

[0024] According to an exemplary embodiment of this application, the central curvature radius R32 of the second side surface of the third lens and the central curvature radius R41 of the first side surface of the fourth lens satisfy: -2≤R32 / R41≤-1.1.

[0025] According to an exemplary embodiment of this application, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45.

[0026] According to an exemplary embodiment of this application, the sagitta SAG32 of the second side of the third lens corresponding to the maximum field of view of the optical lens and the sagitta SAG41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: -0.85≤SAG32 / SAG41≤-0.4.

[0027] According to an exemplary embodiment of this application, the sag of the first side of the third lens corresponding to the maximum field of view of the optical lens, SAG31, the sag of the second side of the third lens corresponding to the maximum field of view of the optical lens, SAG32, the sag of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG41, and the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: |(SAG31×SAG42) / (SAG32×SAG41)|≤0.07.

[0028] According to an exemplary embodiment of this application, the central curvature radius R41 of the first side surface of the fourth lens, the central curvature radius R42 of the second side surface of the fourth lens, and the central thickness CT4 of the fourth lens satisfy: -0.24≤R41 / (R42+CT4)<0.

[0029] According to an exemplary embodiment of this application, the optical back focal length BFL of the optical lens and the center thickness CT6 of the sixth lens satisfy: 2≤BFL / CT6≤7.5.

[0030] 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, 28≤TTL / 1mm≤38, 2.5≤TTL / H / θ×1rad≤8.5, 2.2≤TTL / DMAX≤3.6, 0.5≤(F×θ) / D11 / 1rad≤1.3, 0.015≤D11 / H / DFOV×1°≤0.05, 0.035≤D11 / H / F×1mm≤0.12, 0≤|(HF×θ) / (F×θ)|×(1 (mm×1rad) / (1mm-1mm×1rad)≤0.06, 1.2≤F / H≤1.85, 0.1≤F / ENPD / D11×1mm≤0.2, 0.35≤DST / F≤0.75, 0.85≤(H / 2) / (F×tan(θ / 2))≤1.2, 0.06≤BFL / TTL≤0.2, 0.012≤T12 / TTL≤0.15, 0.4≤R22 / (CT2-R21)≤3.5, |F / R31|≤0.55 or 0.035≤CT6 / F≤0.08.

[0031] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 55.288≤(DFOV×F) / H / 1°≤59.248, 1.9059≤TTL / F≤2.3722, 4.9005≤TTL / H / θ×1rad≤6.4589, 2.6856≤TTL / DMAX≤3.2732, 0.7983≤(F×θ) / D11 / 1rad≤0.9437, 0.027≤D11 / H / DFOV×1°≤0.0364, 0.0714≤D11 / H / F×1mm≤0.0814, 0.0002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.0363, 1.4615≤F / H≤1.6753, 0.125≤F / ENPD / D11×1mm≤0.1628, 0.4788≤DST / F≤0.6478, 0.9264≤(H / 2) / (F×tan(θ / 2))≤1.0075, 1.2903≤F3 / F≤1.7851, -999.000≤R42 / 1mm≤-51.7412, 0.0756≤BFL / TTL≤0.1533, 0.0209≤T12 / TTL≤0.122, 1.4≤FNO≤1.73, 0.5286≤R22 / (CT2-R21)≤2.9 368, 1.4098≤F1 / F≤1.9376, -0.9422≤F2 / F≤-0.7351, 1.1413≤F4 / F≤1.428 6. 0.9949≤F5 / F≤3.9045, -1.9063≤F6 / F≤-0.6015, 0.0067≤F / FR42≤0.1489 ,1.7259≤FR41 / F≤2.1680, 1.1850≤FR32 / F≤2.2083, 0≤|F / R31|≤0.5216, 1 .5787≤|R31 / R32|, 4.6378≤|R42 / R41|≤112.4797, -1.8484≤R32 / R41≤-1.2 26. 0.0452≤CT6 / F≤0.0743, 0.1976≤FNO / (T23+CT3)×1mm≤0.385, -0.3368 4≤F4 / R42<-0.0177, 0.0008≤FNO / FR42×1mm≤0.0158, 0.3675≤(T12+T23) / F ≤0.5213, -0.7276≤SAG32 / SAG41≤-0.4821, 0≤|(SAG31×SAG42) / (SAG32×SAG41)|≤0.04147, 29.542≤TTL / 1mm≤36.005, 33.0016≤DFOV / 1°≤40.538, -0.2291≤R41 / (R42+CT4)≤-0.0089 or 2.4517≤BFL / CT6≤7.1509.

[0032] 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.

[0033] The optical lens according to the embodiments of this application employs six lenses with optical power. The first lens has positive optical power, which can significantly converge light rays. The convergence of large-angle light helps reduce the burden on the rear lens elements. Simultaneously, the positive optical power of the first lens has a significant impact on aberrations, especially spherical aberration, coma, and distortion. Positive optical power allows for smaller rear lens elements, reducing the difficulty of aberration correction. The positive optical power of the first lens also affects image quality; it can compensate for the negative field curvature of the rear negative film, making the entire field of view clearer. The first side surface of the first lens is convex, which effectively converges light rays, reduces the aperture of the rear lens elements, and effectively reduces ghosting and stray light effects. The convex first side surface provides the main positive optical power contribution to the first lens, reducing spherical aberration. The convex first side surface also prevents water and dust accumulation.

[0034] The second lens has negative optical power, which corrects the overcorrected aberration caused by the positive optical power of the first lens, forming a counteracting effect and reducing the spherical aberration and field curvature of the entire optical lens; the combination of the second lens and the first lens controls distortion and ensures that the recognition is not distorted.

[0035] The third lens has positive optical power, which can refocus light, reduce light height, and decrease the aperture of the rear lenses. The positive optical power of the third lens helps to combine with the first and second lenses to further improve chromatic aberration correction, especially at the edges of the field of view. Its positive field curvature also supplements the overall sharpness of the chip's field of view. Simultaneously, the presence of the third lens relieves more pressure on the rear lens group to correct aberrations. The positive optical power of the third lens allows for a larger aperture stop, achieving greater light transmission. The second side of the third lens is convex, contributing to its positive optical power while controlling light height and angle, and also fine-tuning the field curvature and chromatic aberration of the front lens group.

[0036] The fourth lens has positive optical power, which can further reduce the lens aperture to meet the miniaturization requirements of automotive optical lenses. The positive optical power of the fourth lens also deeply optimizes axial chromatic aberration, ensuring color elimination across multiple fields of view, while providing positive spherical aberration and field curvature to balance the residual negative aberrations generated by the second lens. The first and second sides of the fourth lens are convex. The biconvex surface of the fourth lens can further converge light rays and reduce their height. The second lens generates a significant amount of negative distortion; the biconvex positive optical power of the fourth lens, in conjunction with the third lens, shares the responsibility of balancing distortion, field curvature, coma, and spherical aberration. The biconvex surface of the fourth lens effectively solves the problem of needing more positive optical power lenses to continuously reduce the aperture and correct aberrations due to the introduction of ultra-large apertures.

[0037] The fifth lens has positive optical power, which can balance the overall optical power distribution of the optical lens, and can finely adjust various aberrations of the front group (mainly advanced aberrations) to make the final balance, which can effectively improve the image quality.

[0038] The sixth lens has negative optical power, which can correct residual field curvature of the optical lens, ensuring sharp image edges. It also provides various negative aberrations, balancing excessive positive aberrations accumulated in the optical lens. Furthermore, it can control the angle of light rays, ensuring precise placement of light at various points on the image plane. The first side of the sixth lens is concave to collect light. The positive optical powers of the third, fourth, and fifth lenses converge a large amount of light and aberrations. To collect light, the concave surface of the first three lenses, with their positive optical powers, provides some correction and balancing.

[0039] 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.

[0040] By rationally allocating the optical 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: 1.5≤TTL / F≤2.7, 1.35≤FNO≤1.75, 0<F / FR42≤0.15. This enables the realization of a low-cost vehicle-mounted telephoto lens that also balances a large aperture and low sensitivity.

[0041] 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.

[0042] The aperture number of the optical lens meets the following condition: 1.35 ≤ FNO ≤ 1.75. An optical lens with a large aperture number can adapt to low-light environments during use.

[0043] The focal length F of the entire optical lens assembly and the single-sided focal length FR42 of the second side of the fourth lens satisfy: 0 < F / FR42 ≤ 0.15. This allows light to transition smoothly on the second side of the fourth lens, reducing the sensitivity of this surface and allowing the light to fill the entrance pupil in conjunction with the continuous convex surface in front, thus achieving a large aperture for the optical lens. Attached Figure Description

[0044] 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 1-19 Schematic diagrams of the optical lenses according to Embodiments 1-19 of this application are shown respectively; Figure 20 A schematic diagram showing the sagitta of the two sides of the third lens and the two sides of the fourth lens according to an embodiment of this application is shown. Figure 21 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown. Figure 22 The defocus modulation transfer function curve of the optical lens according to Embodiment 1 of this application is shown; Figure 23 A standard dot plot of an optical lens according to Embodiment 13 of this application is shown; Figure 24 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 13 of this application is shown. Figure 25 A schematic diagram of the distortion of an optical lens according to Embodiment 13 of this application is shown; Figure 26 A standard dot plot of an optical lens according to a comparative example is shown; Figure 27 The modulation transfer function curve of an optical lens according to a comparative example of this application is shown.

[0045] 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

[0046] 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.

[0047] 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.

[0048] The features, principles and other aspects of this application are described in detail below.

[0049] 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.

[0050] 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.

[0051] In the example embodiment, the first lens has positive optical power, which can significantly converge light rays. The convergence of large-angle light helps reduce the burden on the rear lens group. Simultaneously, the positive optical power of the first lens has a significant impact on aberrations, especially spherical aberration, coma, and distortion. Positive optical power allows for smaller rear lens group sizes, reducing the difficulty of aberration correction. The positive optical power of the first lens also affects image quality; it can compensate for the negative field curvature of the rear negative film, making the entire field of view clearer. The first side surface of the first lens is convex, which effectively converges light rays, reduces the aperture of the rear lens group, and effectively reduces ghosting and stray light effects. The convex first side surface provides the primary positive optical power contribution to the first lens, reducing spherical aberration. Furthermore, the convex first side surface also prevents water and dust accumulation. The second side of the first lens is either concave or convex, which, combined with the shape of the first side, controls the influence of primary spherical aberration. By controlling the surface shape of the second side of the first lens, the coma distribution caused by the first side of the first lens is controlled, thus improving image quality. The second side of the first lens also utilizes negative field curvature to correct the positive field curvature of the first side, ensuring sharpness, changing the direction of light, and helping to improve chromatic aberration and stray light.

[0052] In the example embodiment, the second lens has negative optical power, correcting the overcorrected aberration caused by the positive optical power of the first lens, forming a counterbalancing effect, and reducing spherical aberration and field curvature of the entire optical lens; the combination of the second lens and the first lens controls distortion, ensuring that recognition is not distorted. The first side of the second lens is concave, receiving light from the first lens, which can correct the light, correct spherical aberration, and simultaneously control the light, suppressing coma. The second side of the second lens is also concave, and the combination of the second side and the first side forms negative optical power, correcting chromatic aberration and field curvature. The combination of the biconcave negative optical power of the second lens and the positive optical power of the first lens in the front group is beneficial for high and low temperature focus control.

[0053] In the example implementation, the third lens has positive optical power, which can refocus light, reduce light height, and decrease the aperture of the rear lens. The positive optical power of the third lens helps to combine with the first and second lenses to further improve chromatic aberration correction, especially at the edges of the field of view. Its positive field curvature also supplements the clarity of the chip's entire field of view. Simultaneously, the presence of the third lens relieves more pressure on the rear lens group to correct aberrations. The positive optical power of the third lens ensures that the aperture stop can be made larger, achieving a large light throughput. The first side of the third lens is convex or concave, which can correct participating spherical aberration, coma, and field curvature caused by the light emitted from the second lens. The second side of the third lens is convex, contributing to the positive optical power of the third lens, while also controlling the light height and angle, and fine-tuning the field curvature and chromatic aberration of the front lens group.

[0054] In the example implementation, the fourth lens has positive optical power, which can further reduce the lens aperture and meet the miniaturization requirements of automotive optical lenses. The positive optical power of the fourth lens also deeply optimizes axial chromatic aberration, ensuring color elimination across multiple fields of view, while providing positive spherical aberration and field curvature to balance the residual negative aberrations generated by the second lens. The first side surface of the fourth lens is convex, and the second side surface is also convex. The biconvex surface of the fourth lens can further converge light rays and reduce their height. The second lens generates a large amount of negative distortion; the biconvex positive optical power of the fourth lens, in conjunction with the third lens, shares the responsibility of balancing distortion, field curvature, coma, and spherical aberration. The biconvex surface of the fourth lens effectively solves the problem of needing more positive optical power lenses to continuously reduce the aperture and correct aberrations due to the introduction of ultra-large apertures.

[0055] In the example embodiment, the fifth lens has positive optical power, which can balance the overall optical power distribution of the optical lens and finely adjust various aberrations (mainly higher-order aberrations) of the front group, performing a final balance to effectively improve image quality. The first side surface of the fifth lens is concave or convex, and the second side surface of the fifth lens is also concave or convex. The two sides of the fifth lens serve to transition light rays, while providing the positive optical power of the fifth lens and offering a certain degree of aberration compensation.

[0056] In the example embodiment, the sixth lens has a negative optical power and diverges light. By controlling the focal length of the sixth lens, various aberrations introduced by the two positive lenses in front can be effectively corrected, improving image quality. The first side of the sixth lens is concave to collect light. The positive optical powers of the third, fourth, and fifth lenses converge a large amount of light and aberrations. To collect light, the concave first side of the sixth lens provides a certain degree of correction and balancing. The second side of the sixth lens can be convex or concave, mainly to match different combinations of optical powers from the front lenses.

[0057] In an example embodiment, the optical lens may further include an aperture stop disposed between the first lens and the second lens. The aperture stop, located between the first and second lenses, facilitates effective light convergence entering the optical lens, reduces the lens aperture at the rear end of the optical lens, and lowers the assembly sensitivity of the optical lens.

[0058] 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.

[0059] In the example embodiment, the second side surface of the fourth lens and the first side surface of the fifth lens are both spherical and their surface shape is close to that of a plane. The central air gap between the two sides is small, and they have a tendency to be glued together. The fourth lens and the fifth lens can be glued together as a glued component.

[0060] 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.

[0061] 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).

[0062] In the example implementation, the total optical length (TTL) of the optical lens satisfies: 28 ≤ TTL / 1mm ≤ 38. Preferably, 29.542 ≤ TTL / 1mm ≤ 36.005. Controlling the TTL range allows sufficient space for the optical lens to arrange six global surface glass lenses, enabling precise correction of field curvature, chromatic aberration, and distortion, achieving high MTF at long distances. Excessive compression of the TTL leads to overcrowding of the six lenses, making it difficult to allocate positive and negative optical power, resulting in poor far-field edge resolution and large errors in the telephoto distance calculation of the optical lens.

[0063] In the example implementation, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45. Preferably, 33.0016 ≤ DFOV / 1° ≤ 40.538. 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 maximum field of view.

[0064] In the example implementation, the maximum field of view (DFOV) of the optical lens, the focal length F of the entire optical lens group, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 50 ≤ (DFOV × F) / H / 1° ≤ 65. Preferably, 55.288 ≤ (DFOV × F) / H / 1° ≤ 59.248. 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.

[0065] 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, 1.9059 ≤ TTL / F ≤ 2.3722. 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.

[0066] In the example implementation, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) of the maximum field of view of the optical lens satisfy: 2.5 ≤ TTL / H / θ × 1 rad ≤ 8.5. Preferably, 4.9005 ≤ TTL / H / θ × 1 rad ≤ 6.4589. Controlling the range of this relationship allows the optical lens to balance miniaturization and large-area imaging, meeting the application scenarios of eight million or even ten million pixels.

[0067] In the example implementation, the total optical length (TTL) of the optical lens and the maximum value (DMAX) of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 2.2 ≤ TTL / DMAX ≤ 3.6. Preferably, 2.6856 ≤ TTL / DMAX ≤ 3.2732. 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.

[0068] 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: 0.5 ≤ (F×θ) / D11 / 1rad ≤ 1.3. Preferably, 0.7983 ≤ (F×θ) / D11 / 1rad ≤ 0.9437. By controlling the range of this relationship, when the maximum field of view of the optical lens is constant, a smaller maximum aperture of the optical lens can result in a smaller front aperture of the optical lens, thereby reducing the imaging volume of the optical lens.

[0069] 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: 0.015 ≤ D11 / H / DFOV×1° ≤ 0.05. Preferably, 0.027 ≤ D11 / H / DFOV×1° ≤ 0.0364. 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.

[0070] In the example embodiment, the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the focal length F of the entire optical lens assembly satisfy: 0.035≤D11 / H / F×1mm≤0.12. Preferably, 0.0714≤D11 / H / F×1mm≤0.0814. Controlling the range of this relationship allows the optical lens to possess miniaturization, a large aperture, and telephoto characteristics, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[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)≤0.06. Preferably, 0.0002 ≤ |(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.0363. Controlling the range of this relationship results in a high angular reciprocity 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 focal length F of the entire optical lens assembly and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.2 ≤ F / H ≤ 1.85. Preferably, 1.4615 ≤ F / H ≤ 1.6753. By controlling the range of this relationship, the optical lens can possess telephoto and large-area characteristics, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0073] In the example embodiment, the focal length F of the entire optical lens assembly, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: 0.1 ≤ F / ENPD / D11 × 1mm ≤ 0.2. Preferably, 0.125 ≤ F / ENPD / D11 × 1mm ≤ 0.1628. By controlling the range of this relationship, a larger aperture can be obtained while ensuring a smaller front aperture.

[0074] In the example implementation, the effective aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: 0.35 ≤ DST / F ≤ 0.75. Preferably, 0.4788 ≤ DST / F ≤ 0.6478. By controlling the range of this relationship, a larger ratio of aperture diameter to total focal length results in a larger optical lens aperture.

[0075] In the example embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.2. Preferably, 0.9264≤(H / 2) / (F×tan(θ / 2))≤1.0075. 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.

[0076] In the example embodiment, the focal length F3 of the third lens and the focal length F of the entire optical lens assembly satisfy: 1 ​​≤ F3 / F ≤ 2. Preferably, 1.2903 ≤ F3 / F ≤ 1.7851. By controlling the range of this relationship, the third lens has a smaller positive focal length, which, while satisfying the requirement of high light transmission at a large aperture, can ensure a small aperture and achieve lens miniaturization.

[0077] In the example embodiment, the central radius of curvature R42 of the second side surface of the fourth lens satisfies: R42 / 1mm ≤ -50. Preferably, -999.000 ≤ R42 / 1mm ≤ -51.7412. R42 can have a smoother surface shape; the embodiment of -999.000 is merely an example. By controlling the central radius of curvature of the convex surface of the second side surface of the fourth lens, primary spherical aberration is minimized, and the second side surface of the fourth lens corrects aberrations generated by the anterior group, resulting in a significant improvement in resolving power.

[0078] In the example implementation, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the following condition: 0.06 ≤ BFL / TTL ≤ 0.2. Preferably, 0.0756 ≤ BFL / TTL ≤ 0.1533. By controlling the range of this relationship, while satisfying miniaturization, a certain amount of space is left for the back end to achieve low sensitivity.

[0079] In the example embodiment, the air gap T12 between the first lens and the second lens satisfies the following relationship with the total optical length TTL of the optical lens: 0.012 ≤ T12 / TTL ≤ 0.15. Preferably, 0.0209 ≤ T12 / TTL ≤ 0.122. By controlling the range of this relationship, a larger air gap between the first lens and the second lens allows the second lens to receive a beam of larger aperture, achieving a smaller FNO for the same outer diameter and obtaining a large aperture.

[0080] In the example implementation, the aperture number of the optical lens satisfies: 1.35 ≤ FNO ≤ 1.75. Preferably, 1.4 ≤ FNO ≤ 1.73. 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.

[0081] In the example embodiment, the center thickness CT2 of the second lens, the center radius of curvature R22 of the second side surface of the second lens, and the center radius of curvature R21 of the first side surface of the second lens satisfy: 0.4 ≤ R22 / (CT2-R21) ≤ 3.5. Preferably, 0.5286 ≤ R22 / (CT2-R21) ≤ 2.9368. By controlling the range of this relationship, the second lens can effectively counteract the primary spherical aberration caused by the front positive lens, reduce the spherical aberration of the entire lens aperture, and ensure that the edge of the large aperture lens still has high resolution.

[0082] 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 ≤ F1 / F ≤ 2.4. Preferably, 1.4098 ≤ F1 / F ≤ 1.9376. By controlling the range of this relationship, a large field of view light is collected into the optical lens, and the light is effectively diverged, achieving the large target area required for imaging and the telephoto characteristics required for optical lens applications.

[0083] In the example embodiment, the focal length F2 of the second lens and the focal length F of the entire optical lens assembly satisfy: -1.1 ≤ F2 / F ≤ -0.6. Preferably, -0.9422 ≤ F2 / F ≤ -0.7351. By controlling the range of this relationship, the second lens can effectively resolve aberrations caused by light passing through the first lens, reducing sensitivity and improving resolution.

[0084] In the example implementation, the focal length F4 of the fourth lens satisfies the following relationship with the overall focal length F of the optical lens group: 1 ≤ F4 / F ≤ 1.75. Preferably, 1.1413 ≤ F4 / F ≤ 1.4286. By controlling the range of this relationship, the fourth lens following the third positive lens also has a small positive focal length, which is beneficial for gradually converging the beam, compressing the total optical length (TTL), and achieving miniaturization. It also serves as the temperature control material for the optical lens. The preferred material is H-FK61B, which has a high coefficient of thermal expansion. When the temperature changes, it contributes more to the thermal compensation of the entire optical lens, significantly reducing the overall temperature drift of the all-glass optical lens, solving the problems of defocusing and image quality drift in high and low temperature environments in vehicles, and adapting to the wide operating temperature threshold of -40℃ to 125℃ in vehicles, thus providing support for the optical lens to achieve high resolution at high and low temperatures. Specifically, the high CTE coefficient of the H-FK61B causes the optical power of the lens to change with increasing temperature. This change matches the thermal expansion trend of the lens barrel material, resulting in axial expansion of the lens barrel due to heat, which increases the inter-lens spacing. This, in turn, complements the optical power shift caused by the temperature change of the refractive index of the fourth lens material. Together, these two factors form a dual temperature control mechanism—compensation for the lens barrel structure and compensation for the lens material—ensuring focal plane stability and high resolution performance over a wide temperature range.

[0085] In the example implementation, the focal length F5 of the fifth lens and the focal length F of the entire optical lens assembly satisfy: 0.75 ≤ F5 / F ≤ 5. Preferably, 0.9949 ≤ F5 / F ≤ 3.9045. By controlling the range of this relationship, field curvature, astigmatism, and second-order chromatic aberration can be further corrected, and the imaging quality across the entire field of view can be balanced.

[0086] In the example implementation, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: -1.2 ≤ F6 / F ≤ -0.45. Preferably, -1.9063 ≤ F6 / F ≤ -0.6015. Controlling the range of this relationship can balance aberrations and facilitate the control of the angle of light incident on the chip, obtaining a suitable chief ray angle (CRA), and improving the image quality.

[0087] In the example embodiment, the overall focal length F of the optical lens and the single-sided focal length FR42 of the second side of the fourth lens satisfy: 0 < F / FR42 ≤ 0.15. Preferably, 0.0067 ≤ F / FR42 ≤ 0.1489. FR42 refers to the single-sided focal length of the second side of the fourth lens on the air side when light exits from the glass medium to the air medium. By controlling the range of this relationship, the second side of the fourth lens has a larger focal length, allowing light to transition smoothly on this surface. This reduces the sensitivity of this surface, minimizes spherical aberration, and, in conjunction with the continuous convex surface in front, ensures that light fills the entrance pupil, thus achieving a large aperture and high resolution for the optical lens.

[0088] In the example embodiment, the overall focal length F of the optical lens group and the single-sided focal length FR41 of the first side of the fourth lens satisfy the following condition: 1.5 ≤ FR41 / F ≤ 2.4. Preferably, 1.7259 ≤ FR41 / F ≤ 2.1680. FR41 refers to the single-sided focal length of the first side of the fourth lens on the glass medium side when light enters from air. Controlling the range of this relationship, and ensuring that the first side of the fourth lens has a smaller focal length, allows light to be effectively focused on this surface, reducing the aperture of subsequent lenses and shortening the optical path, which is beneficial for miniaturization.

[0089] In the example embodiment, the single-sided focal length FR32 of the second side of the third lens and the overall focal length F of the optical lens assembly satisfy: 1 ​​≤ FR32 / F ≤ 2.35. Preferably, 1.1850 ≤ FR32 / F ≤ 2.2083. FR32 refers to the single-sided focal length of the second side of the third lens on the air side when light exits from the glass medium to the air medium. Controlling the range of this relationship, and ensuring that the second side of the third lens has a smaller focal length, allows light to be effectively focused on this side, avoiding further divergence of light that would lead to an increase in aperture, thus facilitating miniaturization.

[0090] In the example embodiment, the focal length F of the entire optical lens assembly and the central radius of curvature R31 of the first side surface of the third lens satisfy: |F / R31|≤0.55. Preferably, 0≤|F / R31|≤0.5216. By controlling the range of this relationship, the first side surface of the third lens is kept to have a larger curvature, so that the light rays diverging from the second lens are not abruptly converged at this point, reducing the sensitivity at this location.

[0091] In the example implementation, the central radius of curvature R31 of the first side surface of the third lens and the central radius of curvature R32 of the second side surface of the third lens satisfy: R31 > |R32|. The central radius of curvature R41 of the first side surface of the fourth lens and the central radius of curvature R42 of the second side surface of the fourth lens satisfy: R42 > |R41|. The third and fourth lenses are two consecutive positive lenses following the negative second lens. By controlling these two relationships, the light rays have a relatively smooth path when entering the first side surface of the third lens and exiting the second side surface of the fourth lens, avoiding large tilt angles that would increase spherical aberration. The two intermediate surfaces (i.e., the second side surface of the third lens and the first side surface of the fourth lens) can effectively correct the aberrations caused by the concave surface in front, thus comprehensively improving the image quality.

[0092] In the example embodiment, the central radius of curvature R31 of the first side of the third lens and the central radius of curvature R32 of the second side of the third lens satisfy: 1.35 ≤ |R31 / R32|. Preferably, 1.5787 ≤ |R31 / R32|. The central radius of curvature R41 of the first side of the fourth lens and the central radius of curvature R42 of the second side of the fourth lens satisfy: 3.5 ≤ |R42 / R41|. Preferably, 4.6378 ≤ |R42 / R41| ≤ 112.4797. By controlling the range of these two relationships, the central radii of curvature on both sides of the third and fourth lenses have a relatively significant difference, which achieves effective light compression and convergence and aberration correction while avoiding the introduction of more spherical aberration.

[0093] In the example implementation, the central radius of curvature R32 of the second side surface of the third lens and the central radius of curvature R41 of the first side surface of the fourth lens satisfy: -2 ≤ R32 / R41 ≤ -1.1. Preferably, -1.8484 ≤ R32 / R41 ≤ -1.226. The second lens has negative power, so it needs to be matched by a subsequent positive power lens group to avoid excessive light divergence. This positive power lens group is split into two spherical lenses. Based on R31 > |R32| and R42 > |R41|, the range of this relationship is controlled so that the four surfaces of the third and fourth lenses can present an approximately "flat-convex-convex-flat" variation trend. This surface variation trend makes the spherical lenses less affected by the shape factor, achieving overall controllable spherical aberration and improving resolution.

[0094] In the example implementation, the optical lens satisfies: 1.35 ≤ |R31 / R32|, 3.5 ≤ |R42 / R41|, and -2 ≤ R32 / R41 ≤ -1.1. The positive third and fourth lenses require controlled special lens shapes. The curvature of the first side of the third lens is much greater than that of the second side, and the curvature of the second side of the fourth lens is also much greater than that of the first side, resulting in a symmetrical arrangement of two lenses. This shape facilitates the rational distribution of spherical aberration, making the aberration distribution more balanced, reducing tolerance sensitivity, and enhancing the robustness of the optical lens.

[0095] In the example implementation, the center thickness CT6 of the sixth lens and the focal length F of the entire optical lens assembly satisfy: 0.035 ≤ CT6 / F ≤ 0.08. Preferably, 0.0452 ≤ CT6 / F ≤ 0.0743. By controlling the range of this relationship, the sixth lens has a smaller center thickness, and its focal length ratio with the optical lens is kept small. This is beneficial for miniaturization and does not add much aberration burden, thus facilitating the improvement of MTF across the entire field of view.

[0096] In an example embodiment, the f-number of the optical lens, the air interval T23 between the second lens and the third lens, and the center thickness CT3 of the third lens satisfy: 0.17≤FNO / (T23+CT3)×1mm≤0.4. Preferably, 0.1976≤FNO / (T23+CT3)×1mm≤0.385. Controlling the range of this relational expression, and controlling the length of the air interval between the negative second lens and the positive third lens as well as the center thickness of the third lens, can improve the light transmission capability of the second lens, the lens can receive light beams with a larger aperture, and a smaller FNO can be achieved under the same outer diameter.

[0097] In an example embodiment, the focal length F4 of the fourth lens and the center radius of curvature R42 of the second side surface of the fourth lens satisfy: -0.375≤F4 / R42<0. Preferably, -0.33684≤F4 / R42<-0.0177. Controlling the range of this relational expression makes the converging function of the fourth lens basically undertaken by the first side surface of the fourth lens, while the second side surface only gently transitions the light, which not only helps to reduce the sensitivity here, but also enables the optical lens to have a longer focal length, ensuring the application of a large aperture.

[0098] In an example embodiment, the f-number of the optical lens and the image-side single-side focal length FR42 of the second side surface of the fourth lens satisfy: 0<FNO / FR42×1mm≤0.016. Preferably, 0.0008≤FNO / FR42×1mm≤0.0158. Controlling the range of this relational expression, the second side surface of the fourth lens has a smaller optical power, weak light deflection capability, and maintains the height of the light. Due to the reversibility of the optical path, the optical lens can have a larger aperture.

[0099] In an example embodiment, the air interval T12 between the first lens and the second lens, the air interval T23 between the second lens and the third lens, and the overall focal length F of the optical lens satisfy: 0.35≤(T12+T23) / F≤0.55. Preferably, 0.3675≤(T12+T23) / F≤0.5213. Controlling the range of this relational expression is beneficial for the light to be effectively expanded in front of the optical lens, so as to realize the telephoto and large aperture characteristics of the optical lens; at the same time, it can separate the focusing positions of different fields of view, reduce imaging coupling and the chromatic aberration burden of the continuous positive lenses at the rear end.

[0100] In an example embodiment, the sagittal height SAG32 of the second side surface of the third lens corresponding to the maximum field angle of the optical lens and the sagittal height SAG41 of the first side surface of the fourth lens corresponding to the maximum field angle of the optical lens satisfy: -0.85≤SAG32 / SAG41≤-0.4. Preferably, -0.7276≤SAG32 / SAG41≤-0.4821. The schematic illustration of SAG32 and SAG41 is shown in Figure 20As shown. By controlling the range of this relationship, the direction and value of SAG32 and SAG41 are controlled, so that the light rays are effectively converged twice. SAG32 is smaller to avoid excessive compression, while SAG41 is relatively larger, which helps to avoid too many aberrations when the light rays exit from the second side of the fourth lens.

[0101] In the example embodiment, the sagitta SAG31 of the first side of the third lens corresponding to the maximum field of view of the optical lens, the sagitta SAG32 of the second side of the third lens corresponding to the maximum field of view of the optical lens, the sagitta SAG41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, and the sagitta SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: |(SAG31×SAG42) / (SAG32×SAG41)|≤0.07. Preferably, 0≤|(SAG31×SAG42) / (SAG32×SAG41)|≤0.04147. A schematic diagram of SAG31 and SAG42 is shown below. Figure 20 As shown. By controlling the range of this relationship, the values ​​of SAG31 and SAG42 are relatively small compared to SAG32 and SAG41. This makes the normal of the light entering the third lens close to the optical axis, with a small angle of incidence, while the light exiting the fourth lens is slightly bent and has a gentler trajectory, thus reducing the sensitivity of the optical lens.

[0102] In the example implementation, the central radius of curvature R41 of the first side surface of the fourth lens, the central radius of curvature R42 of the second side surface of the fourth lens, and the central thickness CT4 of the fourth lens satisfy: -0.24 ≤ R41 / (R42+CT4) < 0. Preferably, -0.2291 ≤ R41 / (R42+CT4) ≤ -0.0089. Controlling the range of this relationship ensures that the sum of R41, R42, and CT4 maintains a negative ratio, constraining the asymmetry of the curvature of the two surfaces of the fourth lens. The lower limit prevents the introduction of advanced spherical aberration, while the upper limit approaches zero, constraining the fourth lens to maintain a reasonable biconvex shape, thereby precisely controlling the distribution of spherical aberration and coma between the two refractive surfaces and ensuring high pixel resolution.

[0103] In the example implementation, the optical back focal length (BFL) of the optical lens and the center thickness (CT6) of the sixth lens satisfy the following condition: 2 ≤ BFL / CT6 ≤ 7.5. Preferably, 2.4517 ≤ BFL / CT6 ≤ 7.1509. By controlling the range of this relationship, the spatial proportions of the rear optical structure are constrained. This ensures miniaturization while reserving assembly space for sensors, protective glass, etc., and controlling the image-side principal ray angle to avoid pixel crosstalk.

[0104] In the example implementation, the optical lens satisfies the following conditions: 1.2≤F1 / F≤2.4, -1.1≤F2 / F≤-0.6, 1≤F3 / F≤2, 1≤F4 / F≤1.75, 0.75≤F5 / F≤5, and -1.2≤F6 / F≤-0.45. By controlling the range of these relationships, the positive and negative pairing of the first and second lenses enables focusing with a strong positive optical power. The second lens provides negative correction to compensate for aberrations. The subsequent two consecutive positive third and fourth lenses evenly distribute the optical power. The positive fifth lens has a wide focal length and, together with the negative sixth lens, corrects aberrations such as field curvature. Furthermore, the positive first lens and the negative sixth lens form asymmetrical correction at the beginning and end of the optical lens. The dual negatives of the second and sixth lenses, with different amplitudes, achieve chromatic aberration elimination. 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.

[0105] 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.

[0106] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0107] 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 first lens L1 and the second lens L2.

[0108] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0109] The second lens L2 has negative optical power, and its first side surface S3 is concave, and its second side surface S4 is concave.

[0110] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0111] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0112] The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0113] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0114] 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. A filter can be deposited on any one of the lenses from the first lens L1 to the sixth lens L6. Table 1 shows the basic parameters of the optical lens of Embodiment 1.

[0115] Table 1. Basic parameters of the optical lens in Example 1

[0116] Figure 21 and Figure 22 In this context, T represents the meridian direction, S represents the sagittal direction, and DEG stands for "degrees". From... Figure 21 In general, when the spatial frequency is 119 lp / mm (line pairs / millimeter), the peak MTF of the 0° center field of view (corresponding to the normalized 0 field of view) reaches above 0.7, the peak MTF of the 12.03° field of view (corresponding to the normalized 0.7 field of view) reaches above 0.6, and the peak MTF of the 17.24° edge field of view (corresponding to the normalized 1 field of view) reaches above 0.4. Figure 22 As shown, the horizontal axis represents the defocus amount in mm; the vertical axis represents the MTF modulation value (unitless); the curves correspond to the meridional and sagittal directions at different field of view angles, respectively, and the origin represents the theoretically optimal imaging plane. The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view is small. Under the same field of view, the peak positions of the defocus MTF in the meridional and sagittal directions are close, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring imaging quality across the entire field of view. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 1 exhibits only minor distortion in the edge field of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens given in Example 1 has good imaging quality.

[0117] In summary, the optical lens provided in Embodiment 1 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0118] Example 2 The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 2 shows the basic parameters of the optical lens of Embodiment 2.

[0119] Table 2 Basic parameters of the optical lens in Example 2

[0120] The optical lens of Example 2 exhibits a peak MTF of over 0.75 for the normalized 0 field of view, over 0.6 for the normalized 0.7 field of view, and over 0.4 for the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 2 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring high imaging quality across the entire field of view. The optical lens of Example 2 exhibits only minor distortion in the peripheral field of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens presented in Example 2 possesses superior imaging quality.

[0121] In summary, the optical lens provided in Embodiment 2 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0122] Example 3 The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is a convex surface. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0123] Table 3. Basic parameters of the optical lens in Example 3

[0124] The optical lens of Example 3 exhibits a peak MTF of over 0.75 for a normalized 0 field of view, over 0.6 for a normalized 0.7 field of view, and over 0.4 for a normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 3 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 3 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 3 possesses excellent imaging quality.

[0125] In summary, the optical lens provided in Embodiment 3 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0126] 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. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0127] Table 4. Basic parameters of the optical lens in Example 4

[0128] The optical lens of Example 4 exhibits a peak MTF of over 0.75 for a normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of over 0.55 for a normalized 0.7 field of view, and a peak MTF of over 0.35 for a normalized 1 field of view. The optimal focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 4 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 4 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 4 possesses excellent imaging quality.

[0129] In summary, the optical lens provided in Embodiment 4 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0130] Example 5 The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S2 of the first lens L1 is convex; while the first side surface S5 of the third lens L3 is concave. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0131] Table 5. Basic parameters of the optical lens in Example 5

[0132] The optical lens of Example 5 exhibits a peak MTF of over 0.75 for a normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of over 0.6 for a normalized 0.7 field of view, and a peak MTF of over 0.3 for a normalized 1 field of view. The optimal focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 5 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 5 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 5 possesses excellent imaging quality.

[0133] In summary, the optical lens provided in Embodiment 5 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0134] 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 S10 of the fifth lens L5 is convex, while 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.

[0135] Table 6 Basic parameters of the optical lens in Example 6

[0136] The optical lens of Example 6 exhibits a peak MTF of over 0.75 for a normalized 0 field of view, over 0.6 for a normalized 0.7 field of view, and over 0.4 for a normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 6 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 6 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 6 possesses excellent imaging quality.

[0137] In summary, the optical lens provided in Embodiment 6 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0138] Example 7 The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S10 of the fifth lens L5 is convex, while the second side surface S12 of the sixth lens L6 is concave. Table 7 shows the basic parameters of the optical lens of Embodiment 7.

[0139] Table 7 Basic parameters of the optical lens in Example 7

[0140] The optical lens of Example 7 exhibits a peak MTF of over 0.75 for a normalized 0 field of view, over 0.6 for a normalized 0.7 field of view, and over 0.4 for a normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 7 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 7 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 7 possesses excellent imaging quality.

[0141] In summary, the optical lens provided in Embodiment 7 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0142] Example 8 The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S9 of the fifth lens L5 is concave, while the second side surface S10 is convex. Table 8 shows the basic parameters of the optical lens of Embodiment 8.

[0143] Table 8 Basic parameters of the optical lens in Example 8

[0144] The optical lens of Example 8 exhibits a peak MTF of 0.74 or higher in the normalized 0 field of view, 0.7 or higher in the normalized 0.7 field of view, and 0.6 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 8 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 8 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 8 possesses excellent imaging quality.

[0145] In summary, the optical lens provided in Embodiment 8 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0146] Example 9 The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S12 of the sixth lens L6 is concave. Table 9 shows the basic parameters of the optical lens of Embodiment 9.

[0147] Table 9. Basic parameters of the optical lens in Example 9

[0148] The optical lens of Example 9 exhibits a peak MTF of 0.75 or higher in the normalized 0 field of view, 0.65 or higher in the normalized 0.7 field of view, and 0.4 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 9 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 9 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 9 possesses excellent imaging quality.

[0149] In summary, the optical lens provided in Embodiment 9 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0150] 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 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 10 shows the basic parameters of the optical lens of Embodiment 10.

[0151] Table 10 Basic parameters of the optical lens in Example 10

[0152] The optical lens of Example 10 exhibits a peak MTF of 0.75 or higher in the normalized 0 field of view, 0.65 or higher in the normalized 0.7 field of view, and 0.4 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 10 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 10 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 10 possesses excellent imaging quality.

[0153] In summary, the optical lens provided in Embodiment 10 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0154] Example 11 The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11As 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 11 shows the basic parameters of the optical lens of Embodiment 11.

[0155] Table 11 Basic parameters of the optical lens in Example 11

[0156] The optical lens of Example 11 exhibits a peak MTF of 0.75 or higher in the normalized 0 field of view, 0.65 or higher in the normalized 0.7 field of view, and 0.5 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 11 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 11 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality in each field of view. Therefore, the optical lens provided in Example 11 possesses excellent imaging quality.

[0157] In summary, the optical lens provided in Embodiment 11 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0158] 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.

[0159] Table 12 Basic parameters of the optical lens in Example 12

[0160] The optical lens of Example 12 exhibits a peak MTF of over 0.75 for a normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of over 0.65 for a normalized 0.7 field of view, and a peak MTF of over 0.5 for a normalized 1 field of view. The optimal focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 12 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 12 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 12 possesses excellent imaging quality.

[0161] In summary, the optical lens provided in Embodiment 12 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.73. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0162] Example 13 The following is for reference Figure 13 Describes an optical lens according to Embodiment 13 of this application. For example... Figure 13 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S10 of the fifth lens L5 is convex, while the second side surface S12 of the sixth lens L6 is concave. Table 13-1 shows the basic parameters of the optical lens of Embodiment 13.

[0163] Table 13-1 Basic parameters of the optical lens in Example 13

[0164] The optical lens of Example 13 exhibits a peak MTF of 0.7 or higher in the normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of 0.6 or higher in the normalized 0.7 field of view, and a peak MTF of 0.3 or higher in the normalized 1 field of view. The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 13 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 13 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality in each field of view. Therefore, the optical lens provided in Example 13 possesses good imaging quality.

[0165] In summary, the optical lens provided in Embodiment 13 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0166] This application provides a pair of comparative optical lenses. The difference between the comparative optical lens and the optical lens of Example 13 lies in the values ​​of the distances from R42, FR42, F4, and S14 to the image plane. The optical parameters of the comparative optical lens, such as the central radius of curvature, lens thickness, and lens shape of each lens surface, are the same as those of the optical lens of Example 13. Table 13-2 shows the basic parameters of the comparative optical lens.

[0167] Table 13-2 Basic Parameters of Comparative Optical Lenses

[0168] Figure 23 and Figure 26 Standard dot plots of the optical lens of Example 13 and the optical lens of the comparative example are shown respectively; Figure 23 and 26 In the image, light rays of various wavelengths (0.656 μm, 0.588 μm, 0.546 μm, 0.486 μm, and 0.436 μm) emitted from the central field of view along the optical axis, after passing through the optical lens, form a diffuse spot image near the center of the image plane. Figure 23 and 26In the diagram, the horizontal and vertical axes represent the two-dimensional spatial coordinates of the light spot on the image plane, respectively. IMA: 0.000, 0.000 mm indicates the center of the image plane. FLD: 0.00, 0.00° indicates the field of view on the central axis. FLD stands for Field of View.

[0169] The geometric spot radius represents the physical maximum dispersion range of the entire spot, encompassing all stray edge rays; a smaller value indicates smaller spherical aberration. From Figure 23 As can be seen, the geometric spot radius of the optical lens in Example 13 is 5.36 mm. From Figure 26 As can be seen, the geometric spot radius of the comparative optical lens is 11.008mm.

[0170] Figure 24 and Figure 27 The MTF diagrams of the optical lens of Embodiment 13 and the comparative optical lens are shown respectively, with reference to the center field of view; from Figure 24 As can be seen, the optical lens of Example 13 achieves a peak MTF of over 0.7 in the center field of view at a spatial frequency of 119 lp / mm, which is sufficient to meet the imaging requirements of eight megapixels or even higher. From Figure 27 As can be seen, the MTF peak of the comparative optical lens at a spatial frequency of 119 lp / mm only reaches 0.4 or higher in the center field of view.

[0171] from Figure 23 , Figure 24 , Figure 26 and Figure 27 As can be seen, with other lens parameters unchanged, when the convex surface of the second side S8 of the fourth lens L4 becomes more curved—for example, when the R42 of the comparative optical lens is adjusted to -48mm, the F / FR42 is 0.16—and focusing is performed, it can be clearly seen that the spherical aberration of the comparative optical lens increases and the MTF decreases compared to the optical lens of Example 13. When both sides of the fourth lens L4 are convex, the second side S8 of the fourth lens L4 should have a gentle surface. Controlling the optical lens to satisfy 0 < F / FR42 ≤ 0.15 means that the fourth lens L4 is less affected by the shape factor, and the two sides of the fourth lens L4 can share the refraction of light, making the spherical aberration of the optical lens controllable.

[0172] Figure 25 The example illustrates the distortion values ​​of 436nm wavelength light under different fields of view of the optical lens of Example 13. Figure 25 In the diagram, the black dashed line represents the baseline where the distortion value is 0. From... Figure 25 As can be seen, the optical lens of Example 13 exhibits only minor distortion at the edge of the field of view, with uniform resolution across all fields of view and high imaging quality. Therefore, the optical lens provided in Example 13 has good imaging quality.

[0173] Example 14 The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 14 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 14 shows the basic parameters of the optical lens of Embodiment 14.

[0174] Table 14 Basic parameters of the optical lens in Example 14

[0175] The optical lens of Example 14 exhibits a peak MTF of over 0.75 for a normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of over 0.65 for a normalized 0.7 field of view, and a peak MTF of over 0.5 for a normalized 1 field of view. The optimal focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 14 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 14 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 14 possesses excellent imaging quality.

[0176] In summary, the optical lens provided in Embodiment 14 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0177] Example 15 The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 15 As shown, the main 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.

[0178] Table 15 Basic parameters of the optical lens in Example 15

[0179] The optical lens of Example 15 exhibits a peak MTF of over 0.77 for a normalized 0 field of view, over 0.6 for a normalized 0.7 field of view, and over 0.5 for a normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 15 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 15 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 15 possesses excellent imaging quality.

[0180] In summary, the optical lens provided in Embodiment 15 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0181] Example 16 The following is for reference Figure 16 Describes an optical lens according to Embodiment 16 of this application. For example... Figure 16 As shown, the main 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 16 shows the basic parameters of the optical lens of Embodiment 16.

[0182] Table 16 Basic parameters of the optical lens in Example 16

[0183] The optical lens of Example 16 exhibits a peak MTF of 0.75 or higher in the normalized 0 field of view, 0.65 or higher in the normalized 0.7 field of view, and 0.4 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 16 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 16 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 16 possesses excellent imaging quality.

[0184] In summary, the optical lens provided in Embodiment 16 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.5. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0185] Example 17 The following is for reference Figure 17 Describes an optical lens according to Embodiment 17 of this application. For example... Figure 17 As shown, the main 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 17 shows the basic parameters of the optical lens of Embodiment 17.

[0186] Table 17 Basic parameters of the optical lens in Example 17

[0187] The optical lens of Example 17 exhibits a peak MTF of over 0.76 for the normalized 0 field of view, over 0.6 for the normalized 0.7 field of view, and over 0.4 for the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view in Example 17 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 17 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 17 possesses excellent imaging quality.

[0188] In summary, the optical lens provided in Embodiment 17 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.4. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0189] Example 18 The following is for reference Figure 18 Describes an optical lens according to Embodiment 18 of this application. For example... Figure 18As 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 18 shows the basic parameters of the optical lens of Embodiment 18.

[0190] Table 18 Basic parameters of the optical lens in Example 18

[0191] The optical lens of Example 18 exhibits a peak MTF of 0.77 or higher in the normalized 0 field of view, 0.55 or higher in the normalized 0.7 field of view, and 0.3 or higher in the normalized 1 field of view at a spatial frequency of 119 lp / mm (line pairs / mm). The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 18 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 18 exhibits only minor distortion in the edge fields of view, with uniform resolution and high imaging quality across all fields of view. Therefore, the optical lens provided in Example 18 possesses excellent imaging quality.

[0192] In summary, the optical lens provided in Embodiment 18 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0193] Example 19 The following is for reference Figure 19 Describes an optical lens according to Embodiment 19 of this application. For example... Figure 19 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S5 of the third lens L3 is concave. Table 19 shows the basic parameters of the optical lens of Embodiment 19.

[0194] Table 19 Basic parameters of the optical lens in Example 19

[0195] The optical lens of Example 19 exhibits a peak MTF of 0.7 or higher in the normalized 0 field of view at a spatial frequency of 119 lp / mm (line pairs / mm), a peak MTF of 0.5 or higher in the normalized 0.7 field of view, and a peak MTF of 0.4 or higher in the normalized 1 field of view. The optimal imaging focal plane deviation between the center field of view and the 0.7 normalized field of view of Example 19 is small. The defocus MTF peak positions in the meridional and sagittal directions are close within the same field of view, resulting in a large effective depth of focus range. This allows for tolerance of defocus errors caused by sensor assembly, ensuring full-field imaging quality. It can meet the imaging requirements of eight megapixels or even higher. The optical lens of Example 19 exhibits only minor distortion in the edge field of view, with uniform resolution and high imaging quality in each field of view. Therefore, the optical lens provided in Example 19 possesses good imaging quality.

[0196] In summary, the optical lens provided in Embodiment 19 of this application uses six lenses with optical power. By reasonably setting the optical power parameters, shape parameters, and lens material combination of the lenses, it achieves the technical effects of high pixel count, miniaturization, high definition, large aperture, weak ghosting, and an FNO of 1.65. It is an eight-megapixel-level forward-looking telephoto narrow-angle lens for autonomous driving that can effectively capture the most realistic photos.

[0197] Tables 20-1 and 20-2 provide the basic parameters of the optical lenses in Examples 1-19, such as F, FNO, ENPD, TTL, DFOV, θ, H, BFL, DST, DMAX, D11, D12, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, FR42, FR41, and FR32. Wherein, D12 is the maximum aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, D21 is the maximum aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens, D22 is the maximum aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens, D31 is the maximum aperture of the first side of the third lens corresponding to the maximum field of view of the optical lens, D32 is the maximum aperture of the second side of the third lens corresponding to the maximum field of view of the optical lens, D41 is the maximum aperture of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, D42 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, D51 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D52 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, D61 is the maximum aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, and D62 is the maximum aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens.

[0198] Table 20-1 Basic parameters of the optical lenses in Examples 1-7

[0199] Table 20-2 Basic parameters of the optical lenses in Examples 11-19

[0200] In summary, the relationships in each embodiment of Examples 1-19 satisfy the relationships shown in Tables 21-1 and 21-2.

[0201] Table 21-1 Relationships in Examples 1-10

[0202] Table 21-2 Relationships in Examples 11-19

[0203] 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.

[0204] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with positive optical power has a convex first side surface; A second lens with negative optical power has a first concave side and a second concave side. The third lens has positive optical power, and its second side surface is convex. A fourth lens with positive optical power has a convex first side and a convex second side. A fifth lens with positive optical power; 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: 1.5≤TTL / F≤2.7, 1.35≤FNO≤1.75, and 0<F / FR42≤0.15; Wherein, TTL is the total optical length of the optical lens, FNO is the aperture number of the optical lens, F is the focal length of the entire optical lens group, and FR42 is the image-side focal length of the second side of the fourth lens.

2. The optical lens according to claim 1, characterized in that, The second side surface of the first lens is concave; or, The second side surface of the first lens is a convex surface; The first side surface of the third lens is convex; or... The first side surface of the third lens is concave. The first side surface of the fifth lens is convex, and the second side surface is concave; or... The first side surface of the fifth lens is concave, and the second side surface is convex; or... The first side surface of the fifth lens is convex, and the second side surface is convex. 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 F1 of the first lens and the focal length F of the entire optical lens group satisfy: 1.2≤F1 / F≤2.

4.

4. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F2 of the second lens satisfies the following condition with the focal length F of the entire optical lens group: -1.1≤F2 / F≤-0.

6.

5. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F4 of the fourth lens satisfies the following condition with the focal length F of the entire optical lens group: 1≤F4 / F≤1.

75.

6. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F5 of the fifth lens satisfies the following condition with the focal length F of the entire optical lens group: 0.75≤F5 / F≤5.

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: -1.2≤F6 / F≤-0.

45.

8. The optical lens according to any one of claims 1 to 2, characterized in that, The central curvature radius R42 of the second side surface of the fourth lens satisfies: R42 / 1mm≤-50.

9. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F3 of the third lens satisfies the following condition with the focal length F of the entire optical lens group: 1≤F3 / F≤2.

10. 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 single-sided focal length FR41 of the first side of the fourth lens satisfy the following condition: 1.5≤FR41 / F≤2.

4.

11. The optical lens according to any one of claims 1 to 2, characterized in that, The single-sided focal length FR32 of the second side of the third lens and the total focal length F of the optical lens group satisfy: 1≤FR32 / F≤2.

35.

12. The optical lens according to any one of claims 1 to 2, characterized in that, The aperture number of the optical lens, the air gap T23 between the second lens and the third lens, and the center thickness CT3 of the third lens satisfy the following condition: 0.17≤FNO / (T23+CT3)×1mm≤0.

4.

13. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F4 of the fourth lens and the central radius of curvature R42 of the second side surface of the fourth lens satisfy the following condition: -0.375≤F4 / R42<0.

14. The optical lens according to any one of claims 1 to 2, characterized in that, The aperture number of the optical lens and the image-side focal length FR42 of the second side of the fourth lens satisfy: 0 <FNO / FR42×1mm≤0.016。 15. The optical lens according to any one of claims 1 to 2, characterized in that, The air gap T12 between the first lens and the second lens, the air gap T23 between the second lens and the third lens, and the focal length F of the entire optical lens group satisfy the following condition: 0.35≤(T12+T23) / F≤0.

55.

16. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following relationship: R31 > |R32| and R42 > |R41|; Wherein, R31 is the center radius of curvature of the first side surface of the third lens, R32 is the center radius of curvature of the second side surface of the third lens, R41 is the center radius of curvature of the first side surface of the fourth lens, and R42 is the center radius of curvature of the second side surface of the fourth lens.

17. The optical lens according to claim 15, characterized in that, The optical lens satisfies the following relationship: 1.35≤|R31 / R32| and 3.5≤|R42 / R41|; Wherein, R31 is the center radius of curvature of the first side surface of the third lens, R32 is the center radius of curvature of the second side surface of the third lens, R41 is the center radius of curvature of the first side surface of the fourth lens, and R42 is the center radius of curvature of the second side surface of the fourth lens.

18. The optical lens according to claim 15, characterized in that, The central curvature radius R32 of the second side of the third lens and the central curvature radius R41 of the first side of the fourth lens satisfy: -2≤R32 / R41≤-1.

1.

19. 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.

20. The optical lens according to any one of claims 1 to 2, characterized in that, The sag of the second side of the third lens corresponding to the maximum field of view of the optical lens, SAG32, and the sag of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG41, satisfy the following condition: -0.85≤SAG32 / SAG41≤-0.

4.

21. The optical lens according to any one of claims 1 to 2, characterized in that, The sagitta SAG31 of the first side of the third lens corresponding to the maximum field of view of the optical lens, the sagitta SAG32 of the second side of the third lens corresponding to the maximum field of view of the optical lens, the sagitta SAG41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, and the sagitta SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: |(SAG31×SAG42) / (SAG32×SAG41)|≤0.

07.

22. The optical lens according to any one of claims 1 to 2, characterized in that, The central curvature radius R41 of the first side surface of the fourth lens, the central curvature radius R42 of the second side surface of the fourth lens, and the central thickness CT4 of the fourth lens satisfy: -0.24≤R41 / (R42+CT4)<0.

23. The optical lens according to any one of claims 1 to 2, characterized in that, The optical back focal length BFL of the optical lens and the center thickness CT6 of the sixth lens satisfy the following condition: 2≤BFL / CT6≤7.

5.

24. 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, 28≤TTL / 1mm≤38, 2.5≤TTL / H / θ×1rad≤8.5, 2.2≤TTL / DMAX≤3.6, 0.5≤(F×θ) / D11 / 1ra d≤1.3, 0.015≤D11 / H / DFOV×1°≤0.05, 0.035≤D11 / H / F×1mm≤0.12, 0≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm ×1rad)≤0.06, 1.2≤F / H≤1.85, 0.1≤F / ENPD / D11×1mm≤0.2, 0.35≤DST / F≤0.75, 0.85≤(H / 2) / (F×tan(θ / 2))≤1.2, 0.06≤BFL / TTL≤0.2, 0.012≤T12 / TTL≤0.15, 0.4≤R22 / (CT2-R21)≤3.5, |F / R31|≤0.55 or 0.035≤CT6 / F≤0.08; Wherein, DFOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the effective aperture of the aperture stop, BFL is the optical back focal length of the optical lens, T12 is the air gap between the first lens and the second lens, CT2 is the center thickness of the second lens, R22 is the center radius of curvature of the second side of the second lens, R21 is the center radius of curvature of the first side of the second lens, R31 is the center radius of curvature of the first side of the third lens, and CT6 is the center thickness of the sixth lens.

25. 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: 55.288≤(DFOV×F) / H / 1°≤59.248, 1.9059≤TTL / F≤2.3722, 4.9005≤TTL / H / θ×1rad≤6.4589, 2.6856≤TTL / DMAX≤3.2732, 0.7983≤(F×θ) / D11 / 1rad≤0.9437, 0.027≤D11 / H / DFOV×1°≤0.0364, 0.0714≤D11 / H / F×1mm≤0.0814, 0.0002≤|(H-F×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.0363, 1.4615≤F / H≤1.6753, 0.125≤F / ENPD / D11×1mm≤0.1628, 0.4788≤DST / F≤0.6478, 0.9264≤(H / 2) / (F×tan(θ / 2))≤1.0075, 1.2903≤F3 / F≤1.7851, -999.000≤R42 / 1mm≤-51.7412, 0.0756≤BFL / TTL≤0.1533, 0.0209≤T12 / TTL≤0.122, 1.4≤FNO≤1.73, 0.5286≤R22 / (CT2-R21)≤2.9368, 1.4098≤F1 / F≤1.9376, -0.9422≤F2 / F≤-0.7351, 1.1413≤F4 / F≤1.4286, 0.9949≤F5 / F≤3.9045, -1.9063≤F6 / F≤-0.6015, 0.0067≤F / FR42≤0.1489, 1.7259≤FR41 / F≤2.1680, 1.1850≤FR32 / F≤2.2083, 0≤|F / R31|≤0.5216, 1.5787≤|R31 / R32|, 4.6378≤|R42 / R41|≤112.4797, -1.8484≤R32 / R41≤-1.226, 0.0452≤CT6 / F≤0.0743, 0.1976≤FNO / (T23+CT3)×1mm≤0.385, -0.33684≤F4 / R42<-0.0177, 0.0008≤FNO / FR42×1mm≤0.0158, 0.3675≤(T12+T23) / F≤0.5213, -0.7276≤SAG32 / SAG41≤-0.4821, 0≤|(SAG31×SAG42) / (SAG32×SAG41)|≤0.04147, 29.542≤TTL / 1mm≤36.005, 33.0016≤DFOV / 1°≤40.538, -0.2291≤R41 / (R42+CT4)≤-0.0089 or 2.4517≤BFL / CT6≤7.1509；. Wherein, DFOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the effective aperture of the aperture stop, F3 is the focal length of the third lens, BFL is the optical back focal length of the optical lens, T12 is the air gap between the first lens and the second lens, CT2 is the center thickness of the second lens, R22 is the center radius of curvature of the second side of the second lens, R21 is the center radius of curvature of the first side of the second lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, and FR42 is the focal length of the fourth lens. The image-side focal length of the second side of the lens, FR41 is the image-side focal length of the first side of the fourth lens, FR32 is the image-side focal length of the second side of the third lens, R31 is the central radius of curvature of the first side of the third lens, R32 is the central radius of curvature of the second side of the third lens, R41 is the central radius of curvature of the first side of the fourth lens, R42 is the central radius of curvature of the second side of the fourth lens, CT6 is the center thickness of the sixth lens, T23 is the air gap between the second and third lenses, CT3 is the center thickness of the third lens, SAG31 is the sag of the first side of the third lens corresponding to the maximum field of view of the optical lens, SAG32 is the sag of the second side of the third lens corresponding to the maximum field of view of the optical lens, SAG41 is the sag of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens.

26. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 25; 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