Optical Lens and Electronic Device

Abstract

The present application discloses an optical lens and an electronic device. The optical lens sequentially includes, from a first side to a second side along the optical axis: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with an optical power, a fourth lens with a positive optical power, a fifth lens with an optical power, a sixth lens with an optical power, a seventh lens with a positive optical power, and an eighth lens with an optical power; the fifth lens and the sixth lens form a cemented lens group, and the positive and negative attributes of the optical powers of the fifth lens and the sixth lens are opposite; the combined focal length F56 of the fifth lens and the sixth lens and the effective focal length F of the optical lens satisfy: 1 ≤ |F56 / F| ≤ 15; the air gap d78 between the seventh lens and the eighth lens on the optical axis and the overall optical length TTL of the optical lens satisfy: 0.02 ≤ d78 / TTL ≤ 0.2; and the effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: |F8 / F| ≥ 9.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens and an electronic device. Background Art

[0002] In recent years, thanks to the rapid development of automobile assisted driving systems, lenses have been widely used in automobiles, including on-board reversing visual systems, driving recorders, automatic parking and panoramic parking systems, road finding systems, etc.

[0003] The vehicle-mounted lens is a key component for the automatic driving assistance system to obtain external information. In order to ensure driving safety and more accurately detect the driving environment, people have an increasingly high demand for vehicle-mounted lenses. At the same time, the performance and structural size requirements for the lenses used for side view, front view, and surround view are also becoming increasingly high, which is mainly reflected in the following aspects:

[0004] 1) In order to obtain information more accurately, the system needs to be equipped with a larger chip with higher resolution, so the resolution requirements for the lens itself are getting higher and higher; 2) In order to meet higher imaging quality requirements, more lens structures are often selected, but this will seriously affect the miniaturization of the lens; 3) On the basis of meeting the imaging requirements of vehicle-mounted lenses, the smaller the lens, the easier it is to install the vehicle-mounted lens, but this will lead to a contradiction between the resolution and miniaturization of ordinary vehicle-mounted lenses; 4) The CRA (Chief Ray Angle) design of the lens also needs to match the chip. Excessive CRA will cause serious color cast problems; 5) For practical reasons, vehicle-mounted lenses used for assisted driving should meet night vision requirements as much as possible to improve the safety of autonomous driving at night.

[0005] The optical lenses in the prior art still have the following problems: 1) They cannot meet the requirements of high resolution and miniaturization at the same time; 2) They cannot meet the requirements of small front port diameter and miniaturization at the same time; 3) They cannot meet the requirement of small CRA of the optical lens. A small CRA can avoid stray light hitting the lens barrel when the light is emitted from the rear end, and can match the vehicle-mounted chip well without color cast and vignetting; 4) The light transmission ability is not strong and cannot meet the requirements in low-light environments such as at night. Summary of the invention

[0006] The first aspect of the present application provides an optical lens. The optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with an optical power, a fourth lens with a positive optical power, a fifth lens with an optical power, a sixth lens with an optical power, a seventh lens with a positive optical power, and an eighth lens with an optical power; the number of lenses with optical power in the optical lens is eight. The second side surface of the first lens is a concave surface. At least one of the first side surface and the second side surface of the second lens is a convex surface. The first side surface of the third lens is a concave surface, and the second side surface is a convex surface. The first side surface of the fourth lens is a convex surface, and the second side surface is a convex surface. The first side surface of the seventh lens is a convex surface, and the second side surface is a concave surface. The fifth lens and the sixth lens form a cemented lens group, and the positive and negative attributes of the optical powers of the fifth lens and the sixth lens are opposite; the combined focal length F56 of the fifth lens and the sixth lens and the effective focal length F of the optical lens satisfy: 1 ≤ |F56 / F| ≤ 15; the air gap d78 between the seventh lens and the eighth lens on the optical axis and the overall optical length TTL of the optical lens satisfy: 0.02 ≤ d78 / TTL ≤ 0.2; and the effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: |F8 / F| ≥ 9.

[0007] In one embodiment, the optical lens satisfies at least one of the following conditional expressions: 0.29 ≤ D82 / TTL ≤ 0.4, 1 ≤ |F3 / F| ≤ 40, 1 ≤ F7 / F ≤ 25, 55° ≤ (FOV × F) / H ≤ 70°, 2.5 ≤ TTL / H ≤ 3.5, 0.06 ≤ BFL / TL ≤ 0.16, -17 ≤ R32 / F ≤ -0.5, 0.45 ≤ F / H ≤ 0.7, 1.4 ≤ F / ENPD ≤ 2, 0.8 ≤ D82 / H ≤ 1.2, where D82 is the maximum clear aperture of the second side surface of the eighth lens corresponding to the maximum field of view angle of the optical lens, F3 is the effective focal length of the third lens, F7 is the effective focal length of the seventh lens, FOV is the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, BFL is the back focal length of the optical lens, TL is the distance on the optical axis from the center of the first side surface of the first lens to the center of the second side surface of the eighth lens, R32 is the radius of curvature of the second side surface of the third lens, and ENPD is the entrance pupil diameter of the optical lens.

[0008] In one embodiment, the optical lens satisfies at least one of the following conditional expressions: 10 ≤ |F8 / F| ≤ 2000, 0.7 ≤ d8 / (d8 + SAG82 - SAG81) ≤ 1.3, 0.30 ≤ D / TTL ≤ 0.33, 0.07 ≤ (d2 + d3) / TTL ≤ 0.2, 0.3 ≤ D82 / TTL ≤ 0.39, 0.03 ≤ d78 / TTL ≤ 0.19, 0.01 ≤ R71 / R72 ≤ 1, 2 ≤ R72 / d78 ≤ 600, 0.5 ≤ |F5 / F6| ≤ 2.8, 0.02 ≤ d23 / TTL ≤ 0.16, -1.5 ≤ F1 / F ≤ -1.1, 3 ≤ F2 / F ≤ 260, 1.3 ≤ |F3 / F| ≤ 35, 1 ≤ F4 / F ≤ 2.2, 1.5 ≤ F7 / F ≤ 20, 1.2 ≤ |F56 / F| ≤ 12, 58° ≤ (FOV × F) / H ≤ 65°, 0.008 ≤ D / H / FOV × 1° ≤ 0.01, 2.8 ≤ TTL / H ≤ 3, 0.065 ≤ BFL / TL ≤ 0.15, |R11 / F| ≥ 25, 0.07 ≤ (1 / F4 + 1 / F56 + 1 / F7) / (1 / F) ≤ 1.8, -14 ≤ R32 / F ≤ -0.8, 0.5 ≤ F / H ≤ 0.65, 0.002 ≤ d34 / TTL ≤ 0.006, 4.5 ≤ TTL / F ≤ 5, 1.6 ≤ F / ENPD ≤ 1.9, 0.85 ≤ D82 / H ≤ 1.1. Among them, d8 is the central thickness of the eighth lens on the optical axis, SAG82 is the distance from the intersection of the second side surface of the eighth lens and the optical axis to the vertex of the effective radius of the second side surface of the eighth lens on the optical axis, SAG81 is the distance from the intersection of the first side surface of the eighth lens and the optical axis to the vertex of the effective radius of the first side surface of the eighth lens on the optical axis, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, D82 is the maximum clear aperture of the second side surface of the eighth lens corresponding to the maximum field of view angle of the optical lens, d78 is the air gap between the seventh lens and the eighth lens on the optical axis, R71 is the radius of curvature of the first side surface of the seventh lens, R72 is the radius of curvature of the second side surface of the seventh lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, d23 is the air gap between the second lens and the third lens on the optical axis, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, FOV is the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, BFL is the back focal length of the optical lens, TL is the distance on the optical axis from the center of the first side surface of the first lens to the center of the second side surface of the eighth lens, R11 is the radius of curvature of the first side surface of the first lens, d34 is the air gap between the third lens and the fourth lens on the optical axis, R32 is the radius of curvature of the second side surface of the third lens, and ENPD is the entrance pupil diameter of the optical lens.

[0009] In one embodiment, the optical lens satisfies at least one of the following conditional expressions: 12.9677 ≤ |F8 / F| ≤ 1397.2671, 0.7891 ≤ d8 / (d8 + SAG82 - SAG81) ≤ 1.1869, 0.3074 ≤ D / TTL ≤ 0.3243, 0.1060 ≤ (d2 + d3) / TTL ≤ 0.1835, 0.3202 ≤ D82 / TTL ≤ 0.3734, 0.0433 ≤ d78 / TTL ≤ 0.1449, 0.0202 ≤ R71 / R72 ≤ 0.9447, 2.4606 ≤ R72 / d78 ≤ 384.4675, 0.5773 ≤ |F5 / F6| ≤ 2.6631, 0.0348 ≤ d23 / TTL ≤ 0.1219, -1.3782 ≤ F1 / F ≤ -1.1319, 4.0869 ≤ F2 / F ≤ 160.4574, 1.6770 ≤ |F3 / F| ≤ 23.1406, 1.2236 ≤ F4 / F ≤ 1.9881, 2.2311 ≤ F7 / F ≤ 15.3532, 1.4339 ≤ |F56 / F| ≤ 8.6395, 60.6630° ≤ (FOV × F) / H ≤ 61.5807°, 0.0088 ≤ D / H / FOV × 1° ≤ 0.0093, 2.8638 ≤ TTL / H ≤ 2.9258, 0.0791 ≤ BFL / TL ≤ 0.1296, 16.2696 ≤ |R11 / F| ≤ 1.2316E+17, 0.1333 ≤ (1 / F4 + 1 / F56 + 1 / F7) / (1 / F) ≤ 1.2734, -9.3384 ≤ R32 / F ≤ -1.1958, 0.5965 ≤ F / H ≤ 0.6055, 0.0033 ≤ d34 / TTL ≤ 0.0057, 4.8010 ≤ TTL / F ≤ 4.8396, 1.6400 ≤ F / ENPD ≤ 1.8501, 0.9334 ≤ D82 / H ≤ 1.0884.

[0010] The second aspect of the present application provides an electronic device. The electronic device includes the optical lens provided according to the present application, and further includes at least one of an imaging element and a light source. The imaging element is configured to convert an optical image formed by the optical lens into an electrical signal, and light emitted by the light source is projected onto a target area through the optical lens to form an image or illuminate the area.

[0011] The optical lens provided by the exemplary embodiment of the present application includes eight lenses with optical powers. By reasonably distributing the optical powers and surface shapes of some lenses, the first lens is set to have a negative optical power, and the second side is concave, which can effectively diverge light. The second lens is positive, compressing the light diverged by the first lens to enable the light to smoothly enter the subsequent optical system. The two cooperate with each other, which is beneficial for the first lens to better diverge light, thereby reducing the front aperture. The third lens is set to be convex-concave to further transition the light to the fourth lens. The fourth lens is set to be a convex-convex lens with a positive optical power, which quickly converges the light that is overall divergent in the front, changes the light trend, and makes the light approach the optical axis. This is the key light turning point in this architecture, which is beneficial for the light to smoothly enter the subsequent optical system, reduce the rear aperture, and improve the resolution quality. The fifth lens and the sixth lens form a cemented lens group, and the focal length F56 of the cemented lens group and the effective focal length F of the optical lens satisfy: 1 ≤ |F56 / F| ≤ 15, which can better receive the converging light in the front, smoothly transition the light to the seventh lens, and make the light overall show a gentle converging trend, which is beneficial for improving the imaging quality while reducing the rear aperture. The light shows an overall converging trend from the fourth lens to the seventh lens. The air gap d78 between the seventh lens and the eighth lens on the optical axis and the overall optical length TTL of the optical lens satisfy: 0.02 ≤ d78 / TTL ≤ 0.2. Appropriately increasing the distance between the seventh lens and the eighth lens is beneficial for reducing the rear aperture and achieving miniaturization. At the same time, it is beneficial for the converging light to be alleviated and smoothly enter the eighth lens, improving the imaging quality. After the light converges through the seventh lens and reaches the eighth lens, the effective focal length F8 of the eighth lens and the effective focal length F of the optical lens satisfy: |F8 / F| ≥ 9, making the focal length of the eighth lens larger, which is beneficial for the light to transition gently, reduce the system sensitivity, and improve the imaging quality. The eighth lens has a small light deflection angle, which is beneficial for the light to be incident on the imaging surface approximately vertically, reducing the CRA. Therefore, by satisfying 1 ≤ |F56 / F| ≤ 15, 0.02 ≤ d78 / TTL ≤ 0.2, and |F8 / F| ≥ 9, and controlling the relevant parameters of the fifth lens to the eighth lens of the lens, it is beneficial for the optical lens to achieve characteristics such as a small rear aperture, miniaturization, high resolution, and small CRA.

[0012] In addition, the optical lens provided by the present application uses eight lenses. By optimizing the shapes, optical powers, etc. of each lens, the optical lens has at least one beneficial effect such as miniaturization, small aperture, large field of view, long focal length, weak ghost image, high resolution, small CRA, high illuminance, and good temperature performance, enabling the optical lens to better meet the high requirements of in-vehicle applications (for example, autonomous driving assistance systems). Description of the Drawings

[0013] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings. In the drawings:

[0014] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 , Figure 20 respectively show schematic structural diagrams of optical lenses according to Embodiment 1 to Embodiment 20 of the present application;

[0015] Figure 21 , Figure 22 , Figure 23 , Figure 24 , Figure 25 , Figure 26 , Figure 27 , Figure 28 respectively show modulation transfer function curves of optical lenses according to Embodiment 1 to Embodiment 8 of the present application. Detailed Embodiments

[0016] To facilitate understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0017] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0018] In the drawings, for ease of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustration only and are not drawn to an exact scale.

[0019] It should be understood that the optical lens provided in this application can be used for imaging, projection, and lidar lenses. When the optical lens provided in this application is used as an imaging lens or a lidar receiving end lens, the "first side" involved in this article can refer to the object side, and the "second side" can refer to the image side. Light from the object side can be imaged on the image side. Among them, the imaging lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc.; when the optical lens provided in this application is used as a projection lens or a radar transmitting end lens, the "first side" involved in this article can refer to the object side, and the "second side" can refer to the light source side. The light source side can provide light with or without image information. The light from the light source side is projected to the first side after passing through the optical lens, and an image can be formed on the first side or an area can be illuminated, for example.

[0020] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be carried out according to the general methods in the art. For example, the positive and negative of the R value (R refers to the radius of curvature of the paraxial region) are used to judge the convexity and concavity. Exemplarily, in the parameter tables of each lens of the optical lens (for example, Table 1, Table 3, Table 5, etc.), the positive and negative signs of the numerical values of the radius of curvature of each surface only represent the bending direction of the surface. Taking the first side surface as an example, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; taking the second side surface as an example, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0021] In this document, in the parameter tables of the lenses of the optical lens (for example, Table 1, Table 3, Table 5, etc.), the positive or negative sign of the numerical value of the thickness / distance of each surface only represents the direction and does not represent the magnitude. For example, it is defined that the direction from the first side to the second side along the optical axis is the positive direction, and the direction from the second side to the first side along the optical axis is the negative direction. The thickness / distance of a certain surface in a row represents the distance from this surface to the next surface. The thickness / distance of the row where S1 is located is the distance between S1 and S2 on the optical axis (that is, the central thickness of the first lens L1 on the optical axis). The thickness / distance of the row where S2 is located is the distance between S2 and S3 on the optical axis (that is, the spacing distance between the second side S2 of the first lens L1 and the first side S3 of the second lens L2). The thickness / distance of the row where S3 is located is the distance between S3 and S4 on the optical axis (that is, the central thickness of the second lens L2 on the optical axis), and so on. If the direction from this surface to the next surface is consistent with the positive direction, the thickness / distance is a positive number; if the direction from this surface to the next surface is consistent with the negative direction, the thickness / distance is a negative number. For example, the thickness / distance of the row where S6 is located is the distance between S6 and STO on the optical axis. In Table 1, this distance is -0.6673, which means that the direction from S6 to STO is along the negative direction, and STO is located on the first side of S6. Similarly, when it is defined that the direction from the first side to the second side along the optical axis is the positive direction and the direction from the second side to the first side along the optical axis is the negative direction, the positive or negative sign of the numerical value of the sag (such as SAG81, SAG82) involved in this application also only represents the direction and does not represent the magnitude.

[0022] It should also be understood that the terms "comprise", "comprising", "have", "include" and / or "including", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after the list of listed features, it modifies the entire listed features, rather than individual elements in the list. In addition, when describing the embodiments of this application, the use of "may" means "one or more embodiments of this application". And the term "exemplary" is intended to refer to an example or illustration.

[0023] Unless otherwise defined, 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 belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] The features, principles, and other aspects of the present application will be described in detail below.

[0026] In an exemplary embodiment, the optical lens includes, for example, eight lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. These eight lenses are arranged in sequence along the optical axis from the first side to the second side.

[0027] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a vehicle-mounted lens or a lidar receiving-end lens. At this time, the first side of the optical lens can be the object side, and the second side can be the image side. The light from the object side can be imaged on the image side. The imaging surface of the optical lens can be provided on the second side of the optical lens. At this time, the TTL is the distance from the center of the first side (object side surface) of the first lens to the imaging surface of the optical lens on the optical axis. The BFL is the distance from the center of the second side (image side surface) of the eighth lens to the imaging surface on the optical axis.

[0028] In an exemplary embodiment, the optical lens may further include a photosensitive element provided on the second side. Optionally, the photosensitive element provided on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS).

[0029] In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a lidar transmitting-end lens. At this time, the first side of the optical lens can be the object side, and the second side can be the light source side. The light from the light source side passes through the optical lens and is projected onto the object side. For example, an image can be formed on the object side or an area can be illuminated. The light source surface of the optical lens can be provided on the second side of the optical lens. At this time, the TTL is the distance from the center of the first side of the first lens to the light source surface of the optical lens on the optical axis. The BFL is the distance from the center of the second side of the eighth lens to the light source surface on the optical axis.

[0030] In an exemplary embodiment, a diaphragm may be provided between the second lens and the third lens or between the third lens and the fourth lens. The diaphragm is provided between the second lens and the third lens or between the third lens and the fourth lens, which is beneficial to effectively converge the light entering the optical lens, reduce the aperture size of the front lens of the optical lens, and while increasing the light transmission, reduce the assembly sensitivity of the system. However, it should be noted that the position of the diaphragm disclosed here is only an example and not a limitation; in an alternative embodiment, the diaphragm can also be provided at other positions according to actual needs.

[0031] In an exemplary embodiment, the first lens has a negative focal power. Its first side is convex and its second side is concave. The first lens having a negative focal power can collect light rays in a large field of view and diverge them. Under the condition of the same field of view angle, the light rays exiting from the second side (image side) of the first lens can enable the subsequent optical system to have a larger light receiving surface. The first side (object side) of the first lens being convex can collect light rays in a large field of view as much as possible and enter the rear optical system. And in an actual use environment such as rainy or snowy weather, it is conducive to the sliding of water droplets and reduces the impact on imaging. The second side (image side) of the first lens being concave can quickly diverge the large-angle light rays passing through the first side (object side) of the first lens, which is conducive to the aberration correction of the large-angle light rays by the subsequent optical system and achieves high resolution.

[0032] In an exemplary embodiment, the first lens has a negative focal power. Its first side is concave and its second side is concave. The first lens having a negative focal power can collect light rays in a large field of view and diverge them. Under the condition of the same field of view angle, the light rays exiting from the second side (image side) of the first lens can enable the subsequent optical system to have a larger light receiving surface. The first side (object side) of the first lens being concave can receive peripheral light rays with a smaller aperture and diverge them, which is conducive to reducing the front aperture, quickly expanding the light beam, reducing the incident angle of the light rays on the rear lens, being conducive to reducing the light sensitivity, and achieving both long focal length and high resolution. The second side (image side) of the first lens being concave can quickly diverge the large-angle light rays passing through the first side (object side) of the first lens, which is conducive to the aberration correction of the large-angle light rays by the subsequent optical system and achieves high resolution.

[0033] In an exemplary embodiment, the second lens has a positive focal power and can effectively compress the light rays diverged by the first lens, enabling the light rays to smoothly enter the subsequent optical system. The second lens is paired with the first lens, which is conducive to the first lens better diverging the light rays and further reducing the front aperture.

[0034] In an exemplary embodiment, the second lens has a positive focal power. Its first side is convex and its second side is convex. Both sides of the second lens being convex is conducive to further converging the light rays, making the light rays exiting from the second lens closer to the optical axis, which is conducive to reducing the front and rear apertures and achieving miniaturization.

[0035] In an exemplary embodiment, the second lens has a positive focal power. Its first side is convex and its second side is concave. The first side (object side) of the second lens being convex further converges the light rays entering the second lens and reduces the front aperture; the second side (image side) being concave can receive the converged light rays in the front and diverge them appropriately, which is conducive to increasing the light passing amount and enhancing the illuminance of the edge field of view.

[0036] In an exemplary embodiment, the second lens has a positive optical power. Its first side is concave and its second side is convex. The first side (object side) of the second lens is concave and matches the concave surface of the second side (image side) of the first lens, which is beneficial for the second lens to better receive the light from the front, enabling the light to transition smoothly, reducing the light sensitivity, and improving the resolution quality. At the same time, it is also beneficial for reducing light energy loss and increasing the illuminance of the peripheral field of view. The second side (image side) is convex, which is beneficial for further converging the light, reducing the incident height of large-angle light, and thus reducing the rear port diameter of the lens to achieve lens miniaturization.

[0037] In an exemplary embodiment, the third lens has a negative optical power. Its first side is concave and its second side is convex. The third lens having a negative optical power can diverge the light converged by the second lens, dispersing the central light and marginal light of each field of view, which is beneficial for the subsequent lenses to regulate the light and improve the resolution quality. The first side (object side) of the third lens is concave, which can better receive the light from the front, making the incident angle of the light entering the third lens smaller, beneficial for reducing light energy loss, reducing the light sensitivity, and improving the resolution quality. The second side (image side) of the third lens is convex, which, combined with the concave surface of the first side (object side), enables the light to exit smoothly after passing through the third lens, beneficial for improving off-axis aberrations such as field curvature.

[0038] In an exemplary embodiment, the third lens has a positive optical power. Its first side is concave and its second side is convex. The third lens having a positive optical power can share the converging pressure of the second lens, beneficial for reducing the light sensitivity and improving the resolution quality. Both the second lens and the third lens have positive optical powers, which can continuously converge the light, making it more conducive to achieving a small front aperture. The first side (object side) of the third lens is concave, which can better receive the light from the front, and the incident angle of the light entering the third lens is smaller, beneficial for reducing light energy loss, reducing the light sensitivity, and improving the resolution quality. The second side (image side) of the third lens is convex, which, combined with the concave surface of the first side (object side), enables the light to exit smoothly after passing through the third lens, beneficial for improving off-axis aberrations such as field curvature.

[0039] In an exemplary embodiment, the fourth lens has a positive optical power. Its first side is convex and its second side is convex. The fourth lens having a positive optical power can quickly converge the light rays that are overall divergent in the front, change the light ray trend, and deflect the light rays towards the optical axis direction. This is a key light ray turning point in the architecture of the optical lens of this application, which is beneficial for the light rays to smoothly enter the rear optical system, reduce the rear port diameter, and improve the resolution quality. The first side (object side) of the fourth lens is convex, which has a converging effect on the light rays, can further reduce the aberration, is beneficial for achieving high resolution, and improves the resolution ability of the optical system; the second side (image side) of the fourth lens is convex, and the marginal field light rays continue to converge after passing through the fourth lens, which is beneficial for reducing the rear port diameter, achieving miniaturization, making the light ray trend stable at the rear end, reducing the light ray sensitivity, and improving the resolution quality.

[0040] In an exemplary embodiment, the fifth lens has a positive optical power. Its first side is convex and its second side is convex. The fifth lens having a positive optical power has a biconvex shape, further converges the front light rays, makes the light ray transition smooth, thus generating less aberration, which is beneficial for achieving miniaturization at the rear end and high resolution, and improving the resolution ability of the optical system.

[0041] In an exemplary embodiment, the fifth lens has a negative optical power. Its first side is convex and its second side is concave. The fifth lens having a negative optical power has a convex-concave shape, can effectively receive the converged light rays in the front, reduce the deflection degree of the light rays, is beneficial for the light rays to pass smoothly, reduce the light energy loss, improve the relative illumination, and reduce the system sensitivity.

[0042] In an exemplary embodiment, the fifth lens has a negative optical power. Its first side is concave and its second side is concave. The fifth lens having a negative optical power has a concave-concave shape, can appropriately diverge the converged light rays in the front, widen the spacing of the marginal light rays, effectively diverge the marginal light rays, improve the peripheral illumination, and achieve large image plane imaging.

[0043] In an exemplary embodiment, the sixth lens has a negative optical power. Its first side is concave and its second side is convex. The sixth lens having a negative optical power has a concave-convex shape, can receive the light rays continuously converged by the fourth lens and the fifth lens and appropriately diverge them, can make the light rays exit smoothly, is beneficial for improving the aberration, and achieving high resolution.

[0044] In an exemplary embodiment, the sixth lens has a negative optical power. Its first side is concave and its second side is concave. The sixth lens having a negative optical power has a concave-concave shape, receives the light rays continuously converged by the fourth lens and the fifth lens and further diverges the light rays, widens the spacing of the marginal light rays, effectively diverges the marginal light rays, improves the peripheral illumination, and achieves large image plane imaging.

[0045] In an exemplary embodiment, the sixth lens has a positive focal power. Its first side is convex and its second side is convex. The sixth lens has a positive focal power and is biconvex in shape, which can moderately converge the light rays with a gentle transition in front, facilitating the miniaturization of the rear end and high resolution, and improving the resolution ability of the optical system.

[0046] In an exemplary embodiment, the seventh lens has a positive focal power. Its first side is convex and its second side is concave. The seventh lens has a positive focal power and further converges the light rays in front, which is beneficial for a small rear aperture and realizes the miniaturization of the lens. On the basis of realizing a small rear aperture, the first side (object side) of the seventh lens is convex to effectively converge the light rays, and in combination with the concave second side (image side), while receiving the light rays, it appropriately diverges the light rays, increasing the distance between the marginal light rays and the optical axis, effectively diverging the marginal light rays, and improving the marginal illumination of the lens.

[0047] In an exemplary embodiment, the eighth lens has a negative focal power, which can diverge the light rays from the seventh lens, further adjust the divergence of the light ray trend, increase the illumination of the peripheral field of view, and improve the resolution quality.

[0048] In an exemplary embodiment, the eighth lens has a negative focal power. Its first side is convex and its second side is concave. The first side (object side) of the eighth lens is convex, making the incident angle of the light rays smaller, which is beneficial for more light rays to enter the optical system to achieve the high-throughput effect; at the same time, it is beneficial for converging the light rays to quickly reach the image plane, which is beneficial for reducing the overall optical length and realizing miniaturization. The second side (image side) of the eighth lens is concave, which can diverge the central light rays so that the light rays can reach a higher imaging position. At the same time, in combination with the first side and / or the second side of the eighth lens having an inflection point, the peripheral light rays are converged, and then the incident angle of the light rays entering the chip is reduced, which helps to improve the illumination and reduce the CRA, and improve the imaging quality.

[0049] In an exemplary embodiment, the eighth lens has a negative focal power. Its first side is concave and its second side is concave. The first side (object side) of the eighth lens is concave, which can diverge the converging light rays in front, reduce the optical path difference, and improve the imaging quality; the second side (image side) of the eighth lens is concave, which can diverge the central light rays so that the light rays can reach a higher imaging position. At the same time, in combination with the first side and / or the second side of the eighth lens having an inflection point, the peripheral light rays are converged, and then the incident angle of the light rays entering the chip is reduced, which helps to improve the illumination and reduce the CRA, and improve the imaging quality.

[0050] In an exemplary embodiment, the eighth lens has a negative optical power. Its first side is concave and its second side is convex. The first side (object side) of the eighth lens is concave, diverging the converging light ahead so that the light can reach a higher imaging position, achieving large image plane imaging and improving imaging quality. The second side (image side) of the eighth lens is convex, appropriately converging the light diverged by the first side (object side), and achieving a small rear aperture while meeting high resolution.

[0051] In an exemplary embodiment, the eighth lens has a positive optical power, making a further converging adjustment to the light, reducing the distance from the light to the imaging plane, achieving miniaturization, reducing light loss, and improving imaging quality.

[0052] In an exemplary embodiment, the eighth lens has a positive optical power. Its first side is convex and its second side is concave. The first side (object side) of the eighth lens is convex, making the incident angle of the light smaller, which is beneficial for more light to enter the optical system to achieve the high-throughput effect. At the same time, it is beneficial for converging the light so that the light can quickly reach the image plane, which is beneficial for reducing the overall optical length and achieving miniaturization. The second side (image side) of the eighth lens is concave, diverging the central light so that the light can reach a higher imaging position. At the same time, in combination with the first side and / or the second side of the eighth lens, there may be an inflection point, converging the peripheral light, and then reducing the incident angle of the light entering the chip, which helps to improve the illuminance and reduce the CRA, and improve the imaging quality.

[0053] In an exemplary embodiment, the eighth lens has a positive optical power. Its first side is convex and its second side is concave. The first side (object side) of the eighth lens is convex, making the incident angle of the light smaller, which is beneficial for more light to enter the optical system to achieve the high-throughput effect. At the same time, it is beneficial for converging the light so that the light can quickly reach the image plane, which is beneficial for reducing the overall optical length and achieving miniaturization. The second side (image side) of the eighth lens is convex, further converging the light and reducing the rear aperture.

[0054] In an exemplary embodiment, the eighth lens can be an aspherical lens, which is beneficial for smoothly transitioning the light to the imaging plane, correcting astigmatism and field curvature, and improving the resolution ability of the optical system. Further, the first side and the second side of the eighth lens can have an inflection, and the inflection is beneficial for balancing the aberrations of the central field of view and the edge field of view and improving the resolution.

[0055] In an exemplary embodiment, the optical lens can adopt at least two aspherical lenses. Exemplarily, at least two of the second lens, the third lens, and the eighth lens can be aspherical lenses. The curvatures at various positions of the aspherical surface are different, which is beneficial for correcting the system aberrations and improving the resolution ability, especially for reducing the large field of view aberrations. The aspherical lens can achieve lens plasticization and meet the cost reduction requirements without affecting the temperature performance.

[0056] In an exemplary embodiment, the fifth lens and the sixth lens form a cemented lens group, and the positive and negative attributes of the optical powers of the fifth lens and the sixth lens are opposite. After passing through the first lens and the second lens, the light rays tend to diverge, and then pass through the third lens and transition to the fourth lens. The fourth lens can quickly converge the light rays to achieve a turn in the trend of the light rays. At this time, a relatively large optical path difference is introduced, making it difficult to completely eliminate chromatic aberration. By reasonably matching the optical powers and surface shapes of the first lens to the fourth lens, the light rays can enter the fifth lens relatively gently when exiting the fourth lens. Forming a cemented lens group with the fifth lens and the sixth lens is more conducive to correcting chromatic aberration, enabling various aberrations of the optical system to be fully corrected. On the premise of a compact structure, the resolution can be improved, and optical performances such as distortion and CRA can be optimized. In addition, cementing the fifth lens and the sixth lens can effectively eliminate the influence of ghost images on the lens, ensuring a high resolution quality of the lens while eliminating ghost images.

[0057] The present application forming a cemented lens group with the fifth lens and the sixth lens has at least the following technical effects: 1) The use of the cemented part enables various aberrations of the optical system to be fully corrected. On the premise of a compact structure, the resolution can be improved, and optical performances such as distortion and CRA can be optimized; 2) The negative lens in the cemented part has a relatively high refractive index (compared with the positive lens), enabling the light rays to be effectively and smoothly converged at the end, making the light rays reach the imaging surface smoothly, and reducing the overall weight and cost; 3) Reducing the light loss caused by reflection between lenses; The combination of high and low refractive indices of the fifth lens and the sixth lens is conducive to the rapid transition of the light rays in front, increasing the aperture of the diaphragm and improving the light transmission; 4) The use of the cemented part reduces the air gap between the two lenses, making the overall structure of the optical system compact, and at the same time reducing the sensitivity of the lens unit to tolerances such as overall decentration generated during the assembly process.

[0058] In an exemplary embodiment, the optical lens according to the present application can satisfy: 1 ≤ |F56 / F| ≤ 15, where F56 is the combined focal length of the fifth lens and the sixth lens, and F is the effective focal length of the optical lens. Satisfying 1 ≤ |F56 / F| ≤ 15 and reasonably controlling the focal length F56 of the cemented lens group can better receive the converging light rays in front, smoothly transition the light rays to the seventh lens, making the overall trend of the light rays be gently converging, which is beneficial to improving the imaging quality while reducing the rear aperture. More specifically, the optical lens can further satisfy 1.2 ≤ |F56 / F| ≤ 12, and can further satisfy 1.4339 ≤ |F56 / F| ≤ 8.6395. The further ranges can better achieve high resolution and reduce the rear aperture.

[0059] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.02 ≤ d78 / TTL ≤ 0.2, where d78 is the air gap between the seventh lens and the eighth lens on the optical axis, and TTL is the overall optical length of the optical lens. The light converges as a whole from the fourth lens to the seventh lens, satisfying 0.02 ≤ d78 / TTL ≤ 0.2. Appropriately increasing the distance between the seventh lens and the eighth lens is beneficial to reducing the rear port diameter and achieving miniaturization; at the same time, it is beneficial to relieve the converging light and smoothly enter the eighth lens, improving the imaging quality. More specifically, the optical lens may further satisfy 0.03 ≤ d78 / TTL ≤ 0.19, and may further satisfy 0.0433 ≤ d78 / TTL ≤ 0.1449. The further range can better reduce the rear port diameter and achieve miniaturization.

[0060] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F8 / F| ≥ 9, where F8 is the effective focal length of the eighth lens, and F is the effective focal length of the optical lens. The light converges after passing through the seventh lens and reaches the eighth lens, satisfying |F8 / F| ≥ 9, making the focal length of the eighth lens larger, which is beneficial to the smooth transition of light, reducing the system sensitivity, and improving the imaging quality; the eighth lens has a small deflection angle for light, which is beneficial to the light entering the imaging surface approximately perpendicularly and reducing the CRA. More specifically, the optical lens may further satisfy 10 ≤ |F8 / F| ≤ 2000, and may further satisfy 12.9677 ≤ |F8 / F| ≤ 1397.2671. The further range can better achieve high resolution and small CRA.

[0061] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.05 ≤ (d2 + d3) / TTL ≤ 0.25, where d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, and TTL is the overall optical length of the optical lens. Satisfying 0.05 ≤ (d2 + d3) / TTL ≤ 0.25, the second lens and the third lens are relatively thin as a whole, and the light can quickly pass through and reach the fourth lens for convergence, reducing light energy loss, improving the imaging quality, and at the same time reducing the front port diameter and achieving miniaturization. More specifically, the optical lens may further satisfy 0.07 ≤ (d2 + d3) / TTL ≤ 0.2, and may further satisfy 0.1060 ≤ (d2 + d3) / TTL ≤ 0.1835. The further range can better achieve a small front port diameter and miniaturization.

[0062] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0<R71 / R72≤1.5, wherein R71 is the radius of curvature of the first side surface of the seventh lens, and R72 is the radius of curvature of the second side surface of the seventh lens. Satisfying 0<R71 / R72≤1.5, the seventh lens is a convex-concave type, and its radius of curvature is reasonably controlled so that the light is effectively converged after passing through the first side surface (object side surface) of the seventh lens, and smoothly diverges after passing through the second side surface (image side surface), which is conducive to increasing the distance between the edge light and the optical axis and the distance between the edge light rays, so that the edge light rays are effectively diverged, the relative illumination is improved, and the small aperture at the rear end is achieved. More specifically, the optical lens may further satisfy 0.01≤R71 / R72≤1, and may further satisfy 0.0202≤R71 / R72≤0.9447, and the further range may better improve the relative illumination and achieve the small aperture at the rear end.

[0063] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.4≤|F5 / F6|≤3, where F5 is the effective focal length of the fifth lens and F6 is the effective focal length of the sixth lens. Satisfying 0.4≤|F5 / F6|≤3 and reasonably matching the focal lengths of the positive and negative films in the glued component is conducive to smoothing the light in the glued component, reducing light energy loss, better correcting chromatic aberration, and improving resolution quality. More specifically, the optical lens may further satisfy 0.5≤|F5 / F6|≤2.8, and may further satisfy 0.5773≤|F5 / F6|≤2.6631, and further ranges may better improve resolution.

[0064] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.015≤d23 / TTL≤0.17, wherein d23 is the air spacing between the second lens and the third lens on the optical axis, and TTL is the total optical length of the optical lens. When 0.015≤d23 / TTL≤0.17 is satisfied, the light will diverge as a whole after passing through the first lens and the second lens. Controlling the air spacing between the second lens and the third lens is conducive to better divergence of the light and reducing the front port diameter. At the same time, the spacing should not be too large, so as to achieve short TTL on the basis of high resolution. More specifically, the optical lens may further satisfy 0.02≤d23 / TTL≤0.16, and may further satisfy 0.0348≤d23 / TTL≤0.1219. The further range may better achieve miniaturization while taking into account high resolution.

[0065] In an exemplary embodiment, the optical lens according to the present application may satisfy: F2 / F≥2.5, where F2 is the effective focal length of the second lens, and F is the effective focal length of the optical lens. When F2 / F≥2.5 is satisfied, the light rays converge smoothly after passing through the second lens, which is conducive to the smooth transition of the light rays to the third lens, reduces light sensitivity, reduces light energy loss, and improves resolution quality. More specifically, the optical lens may further satisfy 3≤F2 / F≤260, and may further satisfy 4.0869≤F2 / F≤160.4574, and a further range may better achieve high resolution.

[0066] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.6≤d8 / (d8+SAG82-SAG81)≤1.5, wherein d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the distance from the intersection of the second side surface of the eighth lens and the optical axis to the effective radius vertex of the second side surface of the eighth lens on the optical axis, and SAG81 is the distance from the intersection of the first side surface of the eighth lens and the optical axis to the effective radius vertex of the first side surface of the eighth lens on the optical axis. Satisfying 0.6≤d8 / (d8+SAG82-SAG81)≤1.5 makes the lens proportions of the eighth lens uniform, the overall shape relatively flat, the overall moment is small when subjected to radial force, the thermal expansion and contraction changes are uniform, and the temperature performance is good. More specifically, the optical lens can further satisfy 0.7≤d8 / (d8+SAG82-SAG81)≤1.3, and can further satisfy 0.7891≤d8 / (d8+SAG82-SAG81)≤1.1869. The further range can better ensure the temperature performance of the lens and improve the imaging quality.

[0067] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.25≤D / TTL≤0.37, wherein D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and TTL is the total optical length of the optical lens. Satisfying 0.25≤D / TTL≤0.37, controlling the ratio of D to TTL, and achieving short TTL and high resolution while satisfying the small aperture at the front end. More specifically, the optical lens may further satisfy 0.30≤D / TTL≤0.33, and may further satisfy 0.3074≤D / TTL≤0.3243, and further ranges may better achieve miniaturization and high resolution.

[0068] In an exemplary embodiment, the optical lens according to the present application may satisfy: R72 / d78 ≥ 1.5, where R72 is the radius of curvature of the second side surface of the seventh lens, and d78 is the air gap between the seventh lens and the eighth lens on the optical axis. Satisfying R72 / d78 ≥ 1.5, the second side surface of the seventh lens is concave and relatively flat, which is conducive to the smooth divergence of light to the eighth lens, reducing the system sensitivity and improving the imaging quality. By controlling the air gap between the seventh lens and the eighth lens, the marginal rays can be effectively diverged, improving the marginal illuminance. More specifically, the optical lens may further satisfy 2 ≤ R72 / d78 ≤ 600, and may further satisfy 2.4606 ≤ R72 / d78 ≤ 384.4675. The further range can better achieve high resolution and high relative illuminance.

[0069] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2 ≤ F1 / F ≤ -0.5, where F1 is the effective focal length of the first lens, and F is the effective focal length of the optical lens. Satisfying -2 ≤ F1 / F ≤ -0.5, the focal length of the first lens is relatively small, which is conducive to collecting light rays in a large field of view. After the light rays are diverged by the first lens, they can enter the rear optical system well, realizing the characteristics of a long focal length. More specifically, the optical lens may further satisfy -1.5 ≤ F1 / F ≤ -1.1, and may further satisfy -1.3782 ≤ F1 / F ≤ -1.1319. The further range can better achieve the characteristics of a large field of view and a long focal length.

[0070] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.8 ≤ F4 / F ≤ 2.5, where F4 is the effective focal length of the fourth lens, and F is the effective focal length of the optical lens. Satisfying 0.8 ≤ F4 / F ≤ 2.5, the focal length of the fourth lens is positive and relatively small, playing a key converging role in the entire optical system, enabling the light rays to enter the rear optical system smoothly, compressing the rear port diameter, and realizing miniaturization while satisfying high resolution. More specifically, the optical lens may further satisfy 1 ≤ F4 / F ≤ 2.2, and may further satisfy 1.2236 ≤ F4 / F ≤ 1.9881. The further range can better achieve high resolution and a small aperture.

[0071] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV×1°≤0.015, wherein D is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. Satisfying D / H / FOV×1°≤0.015 and rationally controlling D, H, and FOV are conducive to achieving high resolution while realizing a small front-end aperture that takes into account a large field of view and a large image surface. More specifically, the optical lens may further satisfy 0.008≤D / H / FOV×1°≤0.01, and may further satisfy 0.0088≤D / H / FOV×1°≤0.0093, and the further range may better achieve high resolution while realizing a small front-end aperture that takes into account a large field of view and a large image surface.

[0072] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R11 / F|≥20, where R11 is the radius of curvature of the first side of the first lens, and F is the effective focal length of the optical lens. Satisfying |R11 / F|≥20, controlling the radius of curvature of the first side of the first lens can make the pupil image of the ghost image away from the focal plane, so that the ghost image light on the image plane is relatively divergent, effectively reducing the relative energy value of the ghost image, and improving the quality of the lens imaging picture. More specifically, the optical lens may further satisfy |R11 / F|≥25, and may further satisfy 16.2696≤|R11 / F|≤1.2316E+17, and further ranges may better achieve weak ghost images.

[0073] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.05≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤2, wherein F4 is the effective focal length of the fourth lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.05≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤2, the optical power of the fourth lens to the seventh lens is reasonably set, so that the light passes through the fourth lens to the seventh lens more smoothly, the light can be effectively and continuously converged, the light energy loss is reduced, the system sensitivity is reduced, and the resolution quality is improved. More specifically, the optical lens can further satisfy 0.07≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤1.8, and can further satisfy 0.1333≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤1.2734. The further range can better reduce the system sensitivity and improve the resolution.

[0074] In an exemplary embodiment, the optical lens according to the present application can satisfy: 3.5 ≤ TTL / F ≤ 6.5, where TTL is the total optical length of the optical lens and F is the effective focal length of the optical lens. Satisfying 3.5 ≤ TTL / F ≤ 6.5 and reasonably controlling TTL and F are beneficial to achieving miniaturization while taking into account long focal lengths. More specifically, the optical lens can further satisfy 4.5 ≤ TTL / F ≤ 5, and can further satisfy 4.8010 ≤ TTL / F ≤ 4.8396. The further range can better achieve miniaturization while taking into account long focal lengths.

[0075] In an exemplary embodiment, the optical lens according to the present application can satisfy: d34 / TTL ≤ 0.01, where d34 is the air gap between the third lens and the fourth lens on the optical axis, and TTL is the total optical length of the optical lens. Satisfying d34 / TTL ≤ 0.01 and controlling the distance between the third lens and the fourth lens to be small is beneficial in that, on the one hand, it makes the front lens structure compact and leaves a large adjustment space for the design of the rear lenses to meet miniaturization while taking into account high resolution; on the other hand, light can quickly enter the fourth lens after passing through the third lens, reducing light energy loss and increasing the light transmission. More specifically, the optical lens can further satisfy 0.002 ≤ d34 / TTL ≤ 0.006, and can further satisfy 0.0033 ≤ d34 / TTL ≤ 0.0057. The further range can better achieve miniaturization while taking into account high resolution and increase the light transmission.

[0076] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.29 ≤ D82 / TTL ≤ 0.4, where D82 is the maximum light transmission aperture of the second side of the eighth lens corresponding to the maximum field of view angle of the optical lens, and TTL is the total optical length of the optical lens. Satisfying 0.29 ≤ D82 / TTL ≤ 0.4 and controlling the ratio of D82 to TTL can achieve short TTL while taking into account high resolution on the basis of meeting a small aperture at the rear end. More specifically, the optical lens can further satisfy 0.3 ≤ D82 / TTL ≤ 0.39, and can further satisfy 0.3202 ≤ D82 / TTL ≤ 0.3734. The further range can better achieve miniaturization while taking into account high resolution.

[0077] In an exemplary embodiment, the optical lens according to the present application can satisfy: 1 ≤ |F3 / F| ≤ 40, where F3 is the effective focal length of the third lens and F is the effective focal length of the optical lens. Satisfying 1 ≤ |F3 / F| ≤ 40 and reasonably controlling the focal length of the third lens is beneficial for light to smoothly enter the fourth lens and improve the resolution quality. More specifically, the optical lens can further satisfy 1.3 ≤ |F3 / F| ≤ 35, and can further satisfy 1.6770 ≤ |F3 / F| ≤ 23.1406. The further range can better achieve high resolution.

[0078] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1 ≤ F7 / F ≤ 25, where F7 is the effective focal length of the seventh lens and F is the effective focal length of the optical lens. The focal length of the seventh lens is positive, which can effectively converge light. Satisfying 1 ≤ F7 / F ≤ 25 can reasonably control the focal length of the seventh lens, enabling light to enter the eighth lens smoothly, reducing light energy loss, and improving the imaging quality while achieving a small rear aperture. More specifically, the optical lens may further satisfy 1.5 ≤ F7 / F ≤ 20, and may further satisfy 2.2311 ≤ F7 / F ≤ 15.3532. The further range can better achieve high resolution.

[0079] In an exemplary embodiment, the optical lens according to the present application may satisfy: 55° ≤ (FOV × F) / H ≤ 70°, where FOV is the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and F is the effective focal length of the optical lens. Satisfying 55° ≤ (FOV × F) / H ≤ 70° can reasonably control FOV, F, and H, which is beneficial to achieving long focal length and large field of view while satisfying high resolution. More specifically, the optical lens may further satisfy 58° ≤ (FOV × F) / H ≤ 65°, and may further satisfy 60.6630° ≤ (FOV × F) / H ≤ 61.5807°. The further range can better achieve high resolution, long focal length, and large field of view.

[0080] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.5 ≤ TTL / H ≤ 3.5, where TTL is the overall optical length of the optical lens and H is the image height corresponding to the maximum field of view angle of the optical lens. Satisfying 2.5 ≤ TTL / H ≤ 3.5 can reasonably control TTL and H, which is beneficial for the optical system to achieve high resolution while taking into account miniaturization. More specifically, the optical lens may further satisfy 2.8 ≤ TTL / H ≤ 3, and may further satisfy 2.8638 ≤ TTL / H ≤ 2.9258. The further range can better achieve high resolution and miniaturization.

[0081] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.06 ≤ BFL / TL ≤ 0.16, where BFL is the back focal length of the optical lens and TL is the distance on the optical axis from the center of the first side of the first lens to the center of the second side of the eighth lens. Satisfying 0.06 ≤ BFL / TL ≤ 0.16 can reasonably control BFL and TL, which is beneficial for flexibly adjusting the center thickness of the lens and the air gap, and achieving miniaturization while taking into account an appropriate back focal length. More specifically, the optical lens may further satisfy 0.065 ≤ BFL / TL ≤ 0.15, and may further satisfy 0.0791 ≤ BFL / TL ≤ 0.1296. The further range can better achieve miniaturization while taking into account an appropriate back focal length.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy: -17 ≤ R32 / F ≤ -0.5, where R32 is the radius of curvature of the second side surface of the third lens, and F is the effective focal length of the optical lens. Satisfying -17 ≤ R32 / F ≤ -0.5, controlling the second side surface of the third lens to be convex and the radius of curvature value within a certain range is beneficial for the light rays diverging forward to be appropriately converged to the fourth lens, so that the convergence of the light rays reaching the fourth lens can be relatively gentle, reducing the light sensitivity and improving the imaging quality. More specifically, the optical lens may further satisfy -14 ≤ R32 / F ≤ -0.8, and may further satisfy -9.3384 ≤ R32 / F ≤ -1.1958. The further range can better achieve high resolution.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.45 ≤ F / H ≤ 0.7, where F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. Satisfying 0.45 ≤ F / H ≤ 0.7, reasonably controlling F and H is beneficial for the optical system to achieve high resolution while taking into account long focal length. More specifically, the optical lens may further satisfy 0.5 ≤ F / H ≤ 0.65, and may further satisfy 0.5965 ≤ F / H ≤ 0.6055. The further range can better achieve high resolution while taking into account long focal length.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1.4 ≤ F / ENPD ≤ 2, where F is the effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. Satisfying 1.4 ≤ F / ENPD ≤ 2, achieving a small FNO is beneficial for increasing the light transmission amount. A large entrance pupil diameter helps to improve the relative illumination. More specifically, the optical lens may further satisfy 1.6 ≤ F / ENPD ≤ 1.9, and may further satisfy 1.6400 ≤ F / ENPD ≤ 1.8501. The further range can better achieve a small FNO and a high light transmission amount.

[0085] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.8 ≤ D82 / H ≤ 1.2, where D82 is the maximum light transmission aperture of the second side surface of the eighth lens corresponding to the maximum field of view angle of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens. Satisfying 0.8 ≤ D82 / H ≤ 1.2, making the light transmission aperture of the second side surface of the eighth lens close to the image height and the light deflection small is beneficial for achieving a small CRA. More specifically, the optical lens may further satisfy 0.85 ≤ D82 / H ≤ 1.1, and may further satisfy 0.9334 ≤ D82 / H ≤ 1.0884. The further range can better achieve a small CRA.

[0086] In an exemplary embodiment, if necessary, the optical lens of the present application may further include a filter and / or a protective glass disposed between the eighth lens and the imaging surface. The filter can filter light rays with different wavelengths, and the protective glass can prevent elements (such as chips) on the second side of the optical lens from being damaged.

[0087] In an exemplary embodiment, the first lens to the eighth lens may be spherical lenses or aspherical lenses. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased, and even all lenses can be aspherical lenses. The characteristic of an aspherical lens is that the curvature continuously changes from the center to the periphery of the lens. Different from a spherical lens with a constant curvature from the center to the periphery, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality of the lens. The setting of the aspherical lens helps to correct system aberration and improve resolution.

[0088] In an exemplary embodiment, the first lens to the eighth lens may be glass lenses or plastic lenses. The present application does not specifically limit the specific number of glass lenses and plastic lenses. An optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature changes to improve system stability. At the same time, using glass material can avoid problems such as blurred imaging of the lens and affecting the normal use of the lens caused by high and low temperature changes in the use environment. Specifically, when focusing on temperature performance, the first lens to the eighth lens may all be made of glass material. In application scenarios with lower requirements for temperature stability, the first lens to the eighth lens in the optical lens may also all be made of plastic. Making optical lenses with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the eighth lens in the optical lens can also be made of a combination of plastic and glass.

[0089] Through reasonable setting of parameters such as the shape and optical power of each lens, the optical lens according to the above embodiment of the present application can achieve at least one beneficial effect such as miniaturization, small aperture, large field of view, long focal length, weak ghost image, high resolution, small CRA, high illuminance, and good temperature performance.

[0090] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although the embodiment describes an example with eight lenses, the optical lens is not limited to including eight lenses. If necessary, the optical lens may further include other numbers of lenses.

[0091] MTF stands for modulation transfer function, which describes the ability of an optical system to "restore" the object side in the image side. The horizontal axis of the modulation transfer function (MTF) curve is the spatial frequency, and the unit of the spatial frequency is line pairs per millimeter (lp / mm). The vertical axis is the optical modulation function value (i.e., MTF value). The MTF curve of the central field of view of the optical lens provided in this application has an MTF value of more than 0.72 at 119lp / mm, which can meet the required image quality requirements. It should be noted that the optical lenses provided in Examples 1 to 20 of this application can meet the high resolution capability of 8M (eight million) pixels, and their modulation transfer function (MTF) curves are relatively close. Therefore, only the modulation transfer function (MTF) curves of Examples 1 to 8 are exemplarily shown in this application. As for the modulation transfer function (MTF) curves of other embodiments, they are no longer shown one by one, and those skilled in the art should also be able to know based on the content disclosed in this application.

[0092] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0093] Example 1

[0094] The following reference Figure 1 An optical lens according to Embodiment 1 of the present application is described.

[0095] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8 in sequence from the first side to the second side along the optical axis.

[0096] The first lens L1 is a concave-concave lens with negative focal power, whose first side surface S1 is concave, and whose second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive focal power, whose first side surface S3 is convex, and whose second side surface S4 is convex. The third lens L3 is a concave-convex lens with negative focal power, whose first side surface S5 is concave, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S9 is convex, and whose second side surface S10 is convex. The sixth lens L6 is a concave-convex lens with negative focal power, whose first side surface S10 is concave, and whose second side surface S11 is convex. The seventh lens L7 is a convex-concave lens with positive focal power, whose first side surface S12 is convex, and whose second side surface S13 is concave. The eighth lens L8 is a convex-concave lens with positive refractive power, wherein the first side surface S14 is a convex surface, and the second side surface S15 is a concave surface.

[0097] The fifth lens L5 and the sixth lens L6 form a doublet lens group.

[0098] The optical lens may further include a stop STO, and the stop STO may be disposed between the third lens L3 and the fourth lens L4. Optionally, the optical lens may further include a filter and / or a protective glass having a first side S16 and a second side S17.

[0099] Table 1 shows the radius of curvature R, thickness / distance (it should be understood that the thickness / distance in the row of S1 is the central thickness of the first lens L1, the thickness / distance in the row of S2 is the spacing between the second side S2 of the first lens L1 and the first side S3 of the second lens L2, the thickness / distance in the row of S3 is the central thickness of the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0100] Table 1

[0101]

[0102] In Example 1, the first side S3 and the second side S4 of the second lens L2, and the first side S14 and the second side S15 of the eighth lens L8 may be aspherical surfaces, and there are inflections on the second side S4 of the second lens L2, and the first side S14 and the second side S15 of the eighth lens L8. The surface profiles of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0103] (1)

[0104] Wherein, x is the sagitta distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the conic coefficient k and the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in Example 1.

[0105] Table 2

[0106]

[0107] As Figure 21 shown, the MTF value of the central field of view of the optical lens of Example 1 at a spatial frequency of 119 lp / mm exceeds 0.72, and the optical lens given in Example 1 has a high resolution.

[0108] Example 2

[0109] The following is a reference Figure 2Describes an optical lens according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0110] As Figure 2 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side, a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a positive optical power, a sixth lens L6 with a negative optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a positive optical power. The surface types of the respective lenses can be obtained from the data in Table 3 and will not be elaborated further. Table 3 shows the parameters of the respective lenses of the optical lens of Embodiment 2. Table 4 shows the parameters of the aspherical mirror surfaces that can be used in Embodiment 2, where each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1. The first side S14 and the second side S15 of the eighth lens L8 have anastigmatism.

[0111] Table 3

[0112]

[0113] Table 4

[0114]

[0115] As Figure 22 shown, the MTF value of the central field of view of the optical lens of Embodiment 2 at a spatial frequency of 119 lp / mm exceeds 0.72, and the optical lens given in Embodiment 2 has a high resolving power.

[0116] Embodiment 3

[0117] As Figure 3 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a positive optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a positive optical power, a sixth lens L6 with a negative optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a negative optical power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface types of the respective lenses can be obtained from the data in Table 5 and will not be elaborated further. Table 5 shows the parameters of the respective lenses of the optical lens of Embodiment 3. Table 6 shows the parameters of the aspherical mirror surfaces that can be used in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1. The first side S14 and the second side S15 of the eighth lens L8 have anastigmatism.

[0118] Table 5

[0119]

[0120] Table 6

[0121]

[0122] As Figure 23 shown, the MTF value of the central field of view of the optical lens of Example 3 at a spatial frequency of 119 lp / mm exceeds 0.8, and the optical lens given in Example 3 has a high resolution.

[0123] Example 4

[0124] As Figure 4 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a positive optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a positive optical power, a sixth lens L6 with a negative optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a negative optical power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shape of each lens can be obtained according to the data in Table 7, which will not be elaborated here. Table 7 shows the parameters of each lens of the optical lens of Example 4. Table 8 shows the parameters of each aspherical mirror surface that can be used in Example 4, wherein each aspherical surface shape can be defined by the formula (1) given in the above Example 1. The first side surface S14 and the second side surface S15 of the eighth lens L8 have an anastigmatism.

[0125] Table 7

[0126]

[0127] Table 8

[0128]

[0129] As Figure 24 shown, the MTF value of the central field of view of the optical lens of Example 4 at a spatial frequency of 119 lp / mm exceeds 0.81, and the optical lens given in Example 4 has a high resolution.

[0130] Example 5

[0131] As Figure 5As shown in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a positive focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shape of each lens can be obtained from the data in Table 9 and will not be elaborated here. Table 9 shows the parameters of each lens of the optical lens of Embodiment 5. Table 10 shows the parameters of each aspherical mirror surface that can be used in Embodiment 5, wherein each aspherical surface shape is defined by the formula (1) given in the above Embodiment 1. The first side surface S14 and the second side surface S15 of the eighth lens L8 have an anastigmatism.

[0132] Table 9

[0133]

[0134] Table 10

[0135]

[0136] As Figure 25 shown, the MTF value of the central field of view of the optical lens of Embodiment 5 at a spatial frequency of 119 lp / mm exceeds 0.79, and the optical lens given in Embodiment 5 has a high resolution.

[0137] Embodiment 6

[0138] As Figure 6 shown, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a positive focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shape of each lens can be obtained from the data in Table 11 and will not be elaborated here. Table 11 shows the parameters of each lens of the optical lens of Embodiment 6. Table 12 shows the parameters of each aspherical mirror surface that can be used in Embodiment 6, wherein each aspherical surface shape is defined by the formula (1) given in the above Embodiment 1. The first side surface S14 of the eighth lens L8 has an anastigmatism.

[0139] Table 11

[0140]

[0141] Table 12

[0142]

[0143] As Figure 26 shown, the MTF value of the central field of view of the optical lens of Example 6 at a spatial frequency of 119 lp / mm exceeds 0.79, and the optical lens given in Example 6 has a high resolution.

[0144] Example 7

[0145] As Figure 7 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a negative optical power, a sixth lens L6 with a positive optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a negative optical power. The surface shape of each lens can be obtained from the data in Table 13 and will not be elaborated. Table 13 shows the parameters of each lens of the optical lens of Example 7. Table 14 shows the parameters of each aspherical mirror surface that can be used in Example 7, where each aspherical surface shape is defined by the formula (1) given in the above Example 1. There is an anastigmatism on the second side S15 of the eighth lens L8.

[0146] Table 13

[0147]

[0148] Table 14

[0149]

[0150] As Figure 27 shown, the MTF value of the central field of view of the optical lens of Example 7 at a spatial frequency of 119 lp / mm exceeds 0.74, and the optical lens given in Example 7 has a high resolution.

[0151] Example 8

[0152] As Figure 8 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a negative optical power, a sixth lens L6 with a positive optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a negative optical power. The surface shape of each lens can be obtained from the data in Table 15 and will not be elaborated. Table 15 shows the parameters of each lens of the optical lens of Example 8. Table 16 shows the parameters of each aspherical mirror surface that can be used in Example 8, where each aspherical surface shape is defined by the formula (1) given in the above Example 1.

[0153] Table 15

[0154]

[0155] Table 16

[0156]

[0157] As Figure 28 shown, the MTF value of the central field of view of the optical lens of Example 8 at a spatial frequency of 119 lp / mm exceeds 0.73, and the optical lens given in Example 8 has a high resolution.

[0158] Example 9

[0159] As Figure 9 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a negative optical power, a sixth lens L6 with a positive optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a positive optical power. The surface shape of each lens can be obtained according to the data in Table 17 and will not be elaborated here. Table 17 shows the parameters of each lens of the optical lens of Example 9. Table 18 shows the parameters of each aspherical mirror surface that can be used in Example 9, where each aspherical surface shape can be defined by the formula (1) given in the above Example 1. There are reverse curves on the second surface S4 of the second lens L2, the first surface S14 and the second surface S15 of the eighth lens L8.

[0160] Table 17

[0161]

[0162] Table 18

[0163]

[0164] Example 10

[0165] As Figure 10As shown in the figure, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a negative optical power, a sixth lens L6 with a positive optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a positive optical power. The surface profiles of the respective lenses can be obtained from the data in Table 19 and will not be elaborated here. Table 19 shows the parameters of the respective lenses of the optical lens of Embodiment 10. Table 20 shows the parameters of the respective aspherical mirror surfaces that can be used in Embodiment 10, wherein the respective aspherical surface profiles are defined by formula (1) given in the above Embodiment 1. The first side S14 and the second side S15 of the eighth lens L8 have an anastigmatism.

[0166] Table 19

[0167]

[0168] Table 20

[0169]

[0170] Embodiment 11

[0171] As Figure 11 shown in the figure, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative optical power, a second lens L2 with a positive optical power, a third lens L3 with a negative optical power, a fourth lens L4 with a positive optical power, a fifth lens L5 with a positive optical power, a sixth lens L6 with a negative optical power, a seventh lens L7 with a positive optical power, and an eighth lens L8 with a negative optical power. The surface profiles of the respective lenses can be obtained from the data in Table 21 and will not be elaborated here. Table 21 shows the parameters of the respective lenses of the optical lens of Embodiment 11. Table 22 shows the parameters of the respective aspherical mirror surfaces that can be used in Embodiment 11, wherein the respective aspherical surface profiles are defined by formula (1) given in the above Embodiment 1. The second side S4 of the second lens L2, the first side S14 and the second side S15 of the eighth lens L8 have an anastigmatism.

[0172] Table 21

[0173]

[0174] Table 22

[0175]

[0176] Embodiment 12

[0177] As Figure 12As shown in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a negative focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The surface shapes of the respective lenses can be obtained from the data in Table 23, which will not be elaborated here. Table 23 shows the parameters of the respective lenses of the optical lens of Embodiment 12. Table 24 shows the parameters of the respective aspherical surfaces that can be used in Embodiment 12, wherein the respective aspherical surface shapes are defined by formula (1) given in the above Embodiment 1. There are inflections on the second surface S4 of the second lens L2, the first surface S14 and the second surface S15 of the eighth lens L8.

[0178] Table 23

[0179]

[0180] Table 24

[0181]

[0182] Embodiment 13

[0183] As Figure 13 shown in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, a sixth lens L6 with a positive focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a positive focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shapes of the respective lenses can be obtained from the data in Table 25, which will not be elaborated here. Table 25 shows the parameters of the respective lenses of the optical lens of Embodiment 13. Table 26 shows the parameters of the respective aspherical surfaces that can be used in Embodiment 13, wherein the respective aspherical surface shapes are defined by formula (1) given in the above Embodiment 1. There are inflections on the first surface S3 and the second surface S4 of the second lens L2, the first surface S14 and the second surface S15 of the eighth lens L8.

[0184] Table 25

[0185]

[0186] Table 26

[0187]

[0188] Embodiment 14

[0189] AsFigure 14 As shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, a sixth lens L6 with a positive focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a positive focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shapes of the respective lenses can be obtained from the data in Table 27, which will not be elaborated here. Table 27 shows the parameters of the respective lenses of the optical lens of Embodiment 14. Table 28 shows the parameters of the aspherical surfaces that can be used in Embodiment 14, wherein each aspherical surface shape can be defined by the formula (1) given in Embodiment 1 above. The first side S3 and the second side S4 of the second lens L2, and the first side S14 of the eighth lens L8 have anastigmatism.

[0190] Table 27

[0191]

[0192] Table 28

[0193]

[0194] Embodiment 15

[0195] As Figure 15 shown, the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, a sixth lens L6 with a positive focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shapes of the respective lenses can be obtained from the data in Table 29, which will not be elaborated here. Table 29 shows the parameters of the respective lenses of the optical lens of Embodiment 15. Table 30 shows the parameters of the aspherical surfaces that can be used in Embodiment 15, wherein each aspherical surface shape can be defined by the formula (1) given in Embodiment 1 above. The first side S3 and the second side S4 of the second lens L2, the first side S14 and the second side S15 of the eighth lens L8 have anastigmatism.

[0196] Table 29

[0197]

[0198] Table 30

[0199]

[0200] Embodiment 16

[0201] As shown in Figure 16 , the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a positive focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a negative focal power, a sixth lens L6 with a positive focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The aperture stop STO can be disposed between the second lens L2 and the third lens L3. The surface shapes of the respective lenses can be obtained from the data in Table 31, which will not be elaborated here. Table 31 shows the parameters of the respective lenses of the optical lens of Embodiment 16. Table 32 shows the parameters of the aspherical mirror surfaces that can be used in Embodiment 16, wherein the aspherical surface shapes can be defined by formula (1) given in Embodiment 1 above. There are reverse curves on the first side S3 and the second side S4 of the second lens L2, and on the first side S14 and the second side S15 of the eighth lens L8.

[0202] Table 31

[0203]

[0204] Table 32

[0205]

[0206] Embodiment 17

[0207] As shown in Figure 17 , the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a negative focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The surface shapes of the respective lenses can be obtained from the data in Table 33, which will not be elaborated here. Table 33 shows the parameters of the respective lenses of the optical lens of Embodiment 17. Table 34 shows the parameters of the aspherical mirror surfaces that can be used in Embodiment 17, wherein the aspherical surface shapes can be defined by formula (1) given in Embodiment 1 above. There are reverse curves on the first side S14 and the second side S15 of the eighth lens L8.

[0208] Table 33

[0209]

[0210] Table 34

[0211]

[0212] Example 18

[0213] As Figure 18 shown, the optical lens sequentially includes, from the first side to the second side along the optical axis: the optical lens sequentially includes a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a negative focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The surface shapes of the respective lenses can be obtained from the data in Table 35 and will not be elaborated further. Table 35 shows the parameters of the respective lenses of the optical lens of Example 18. Table 36 shows the parameters of the respective aspherical mirror surfaces that can be used in Example 18, wherein the respective aspherical surface shapes are defined by formula (1) given in Example 1 above. The second surface S4 of the second lens L2, the first surface S14 and the second surface S15 of the eighth lens L8 have anastigmation.

[0214] Table 35

[0215]

[0216] Table 36

[0217]

[0218] Example 19

[0219] As Figure 19 shown, the optical lens sequentially includes, from the first side to the second side along the optical axis: the optical lens sequentially includes a first lens L1 with a negative focal power, a second lens L2 with a positive focal power, a third lens L3 with a negative focal power, a fourth lens L4 with a positive focal power, a fifth lens L5 with a positive focal power, a sixth lens L6 with a negative focal power, a seventh lens L7 with a positive focal power, and an eighth lens L8 with a negative focal power. The surface shapes of the respective lenses can be obtained from the data in Table 37 and will not be elaborated further. Table 37 shows the parameters of the respective lenses of the optical lens of Example 19. Table 38 shows the parameters of the respective aspherical mirror surfaces that can be used in Example 19, wherein the respective aspherical surface shapes are defined by formula (1) given in Example 1 above. The first surface S14 and the second surface S15 of the eighth lens L8 have anastigmation.

[0220] Table 37

[0221]

[0222] Table 38

[0223]

[0224] Example 20

[0225] As shown Figure 20 in the figure, the optical lens sequentially includes, from the first side to the second side along the optical axis: the first lens L1 with negative optical power, the second lens L2 with positive optical power, the third lens L3 with negative optical power, the fourth lens L4 with positive optical power, the fifth lens L5 with positive optical power, the sixth lens L6 with negative optical power, the seventh lens L7 with positive optical power, and the eighth lens L8 with negative optical power. The surface types of each lens can be obtained according to the data in Table 39, which will not be elaborated here. Table 39 shows the parameters of each lens of the optical lens in Example 20. Table 40 shows the parameters of each aspherical mirror surface that can be used in Example 20, where each aspherical surface type can be defined by the formula (1) given in the above Example 1. The first side S14 and the second side S15 of the eighth lens L8 have anastigmatism.

[0226] Table 39

[0227]

[0228] Table 40

[0229]

[0230] In summary, Examples 1 to 20 respectively satisfy the relationships shown in the following Tables 41 and 42. In Tables 41 and 42, the units of F, ENPD, TTL, H, D, TL, BFL, F1 to F8, D82, SAG81, SAG82, and F56 are millimeters (mm), the unit of FOV is degrees (°), and FNO has no unit.

[0231] Table 41

[0232]

[0233] Table 42

[0234]

[0235] The optical lenses provided in Examples 1 to 20 of the present application can be used as, for example, vehicle-mounted lenses. At this time, Figures 1 to 20 IMA in the figure represents the imaging surface. The light from the object sequentially passes through each surface S1 to S17 and finally forms an image on the imaging surface provided on the second side, where an image sensing chip is provided at the imaging surface. It should be understood that the optical lenses provided in Examples 1 to 20 of the present application can also be used as, for example, projection lenses or lidar emission end lenses. At this time, Figures 1 to 20In the IMA, for example, it may represent a light source surface. The light from the light source surface sequentially passes through each surface S17 to S1 and is finally projected onto the first side. For example, an image or an illuminated area may be formed on the first side.

[0236] The present application also provides an electronic device. The electronic device may include an optical lens according to the above-described embodiments of the present application, and further includes at least one of an imaging element and a light source. Among them, the imaging element is an imaging element for converting the optical image formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto a target area through the optical lens to form an image or an illuminated area. When the electronic device includes an optical lens and an imaging element, the electronic device may be an independent electronic device such as a detection distance camera, an imaging module integrated on a detection distance device such as a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc., or an imaging module integrated on an auxiliary driving system, or may also be a lidar having at least a receiving end. When the electronic device includes an optical lens and a light source, the electronic device may be a projection module integrated on a mobile electronic device, an independent projection device such as a projector, or may also be a lidar having at least a transmitting end. When the electronic device includes an optical lens, an imaging element, and a light source, the electronic device may be, for example, a lidar having a transmitting end and a receiving end.

[0237] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. An optical lens, characterized in that: The optical lens includes, in sequence from the first side to the second side along the optical axis: A first lens having negative optical power, wherein the second side surface of the first lens is concave; a second lens having positive optical power, wherein at least one of the first side surface and the second side surface is convex; a third lens having optical power, wherein the first side surface is concave and the second side surface is convex; a fourth lens having positive power, wherein the first side surface is convex and the second side surface is convex; a fifth lens having optical power; a sixth lens having optical power; a seventh lens element having positive optical power, wherein the first side surface is convex and the second side surface is concave; and an eighth lens having optical power; The number of lenses having optical power in the optical lens is eight; The fifth lens and the sixth lens form a cemented lens group, and the positive and negative properties of the optical power of the fifth lens and the sixth lens are opposite; The effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 0.45≤F / H≤0.7; The combined focal length F56 of the fifth lens and the sixth lens and the effective focal length F of the optical lens satisfy: 1≤ F56 / F ≤15; An air interval d78 between the seventh lens and the eighth lens on the optical axis and a total optical length TTL of the optical lens satisfy the following: 0.02≤d78 / TTL≤0.2; and The effective focal length F8 of the eighth lens satisfies the effective focal length F of the optical lens: F8 / F ≥9.

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

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

4. The optical lens according to claim 1, characterized in that: The third lens has positive or negative power.

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

6. The optical lens according to claim 1, characterized in that: The eighth lens has positive power, a first side surface is convex, and a second side surface is convex or concave; or The eighth lens has negative optical power, and its first side surface is convex and its second side surface is concave, or the first side surface is concave and the second side surface is convex or concave.

7. The optical lens according to any one of claims 1 to 6, characterized in that: The center thickness d2 of the second lens on the optical axis, the center thickness d3 of the third lens on the optical axis, and the total optical length TTL of the optical lens satisfy the following: 0.05≤(d2+d3) / TTL≤0.

25.

8. The optical lens according to any one of claims 1 to 6, characterized in that: A curvature radius R71 of the first side surface of the seventh lens and a curvature radius R72 of the second side surface of the seventh lens satisfy: 0<R71 / R72≤1.

5.

9. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens satisfy: 0.4≤ F5 / F6 ≤3.

10. The optical lens according to any one of claims 1 to 6, characterized in that: An air interval d23 between the second lens and the third lens on the optical axis and a total optical length TTL of the optical lens satisfy the following: 0.015≤d23 / TTL≤0.

17.

11. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F2 of the second lens and the effective focal length F of the optical lens satisfy: F2 / F≥2.

5.

12. The optical lens according to any one of claims 1 to 6, characterized in that: The center thickness d8 of the eighth lens on the optical axis, the distance SAG82 from the intersection of the second side surface of the eighth lens and the optical axis to the effective radius vertex of the second side surface of the eighth lens on the optical axis, and the distance SAG81 from the intersection of the first side surface of the eighth lens and the optical axis to the effective radius vertex of the first side surface of the eighth lens on the optical axis satisfy: 0.6≤d8 / (d8+SAG82-SAG81)≤1.

5.

13. The optical lens according to any one of claims 1 to 6, characterized in that: The maximum light clearance diameter D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the total optical length TTL of the optical lens satisfy the following: 0.25≤D / TTL≤0.

37.

14. The optical lens according to any one of claims 1 to 6, characterized in that: A curvature radius R72 of the second side surface of the seventh lens and an air distance d78 between the seventh lens and the eighth lens on the optical axis satisfy: 1.5≤R72 / d78≤600.

15. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -2≤F1 / F≤-0.

5.

16. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F4 of the fourth lens and the effective focal length F of the optical lens satisfy: 0.8≤F4 / F≤2.

5.

17. The optical lens according to any one of claims 1 to 6, characterized in that: The maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV×1°≤0.

015.

18. The optical lens according to any one of claims 1 to 6, characterized in that: The radius of curvature R11 of the first side surface of the first lens and the effective focal length F of the optical lens satisfy: R11 / F ≥20.

19. The optical lens according to any one of claims 1 to 6, characterized in that: The effective focal length F4 of the fourth lens, the combined focal length F56 of the fifth lens and the sixth lens, the effective focal length F7 of the seventh lens and the effective focal length F of the optical lens satisfy: 0.05≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤2.

20. The optical lens according to any one of claims 1 to 6, characterized in that: The total optical length TTL of the optical lens and the effective focal length F of the optical lens satisfy: 3.5≤TTL / F≤6.

5.

21. The optical lens according to any one of claims 1 to 6, characterized in that: An air interval d34 between the third lens and the fourth lens on the optical axis and a total optical length TTL of the optical lens satisfy the following: d34 / TTL≤0.

01.

22. The optical lens according to claim 1, characterized in that: The optical lens satisfies at least one of the following conditions: 0.29≤D82 / TTL≤0.4, <h2 style=";text-align:left;direction:ltr">1≤<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> F3 / F<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> ≤40, 1≤F7 / F≤25, 55°≤(FOV×F) / H≤70°, 2.5≤TTL / H≤3.5, 0.06≤BFL / TL≤0.16, -17≤R32 / F≤-0.5, 1.4≤F / ENPD≤2, 0.8≤D82 / H≤1.2, Among them, D82 is the maximum clear aperture of the second side surface of the eighth lens corresponding to the maximum field of view angle of the optical lens, F3 is the effective focal length of the third lens, F7 is the effective focal length of the seventh lens, FOV is the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, BFL is the optical back focus of the optical lens, TL is the distance from the center of the first side surface of the first lens to the center of the second side surface of the eighth lens on the optical axis, R32 is the curvature radius of the second side surface of the third lens, and ENPD is the entrance pupil diameter of the optical lens.

23. The optical lens according to claim 1, characterized in that: The optical lens satisfies at least one of the following conditions: 10≤ F8 / F ≤2000, 0.7≤d8 / (d8+SAG82-SAG81)≤1.3, 0.30≤D / TTL≤0.33, 0.07≤(d2+d3) / TTL≤0.2, 0.3≤D82 / TTL≤0.39, 0.03≤d78 / TTL≤0.19, 0.01≤R71 / R72≤1, 2≤R72 / d78≤600, 0.5≤ F5 / F6 ≤2.8, 0.02≤d23 / TTL≤0.16, -1.5≤F1 / F≤-1.1, 3≤F2 / F≤260, <h2 style=";text-align:left;direction:ltr">1.3≤<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> F3 / F<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> ≤35, 1≤F4 / F≤2.2, 1.5≤F7 / F≤20, 1.2≤ F56 / F ≤12, 58°≤(FOV×F) / H≤65°, 0.008≤D / H / FOV×1°≤0.01, 2.8≤TTL / H≤3, 0.065≤BFL / TL≤0.15, R11 / F ≥25, 0.07≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤1.8, -14≤R32 / F≤-0.8, 0.5≤F / H≤0.65, 0.002≤d34 / TTL≤0.006, 4.5≤TTL / F≤5, 1.6≤F / ENPD≤1.9, 0.85≤D82 / H≤1.1, Wherein, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the distance from the intersection of the second side surface of the eighth lens and the optical axis to the vertex of the effective radius of the second side surface of the eighth lens on the optical axis, SAG81 is the distance from the intersection of the first side surface of the eighth lens and the optical axis to the vertex of the effective radius of the first side surface of the eighth lens on the optical axis, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, d2 is the center thickness of the second lens on the optical axis, d3 is the center thickness of the third lens on the optical axis, D82 is the maximum clear aperture of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, d78 is the air gap between the seventh lens and the eighth lens on the optical axis, R71 is the radius of curvature of the first side surface of the seventh lens, and R72 is the curvature of the second side surface of the seventh lens. radius, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, d23 is the air spacing between the second lens and the third lens on the optical axis, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the optical back focus of the optical lens, TL is the distance from the center of the first side surface of the first lens to the center of the second side surface of the eighth lens on the optical axis, R11 is the curvature radius of the first side surface of the first lens, d34 is the air spacing between the third lens and the fourth lens on the optical axis, R32 is the curvature radius of the second side surface of the third lens, and ENPD is the entrance pupil diameter of the optical lens.

24. The optical lens according to claim 1, characterized in that: The optical lens satisfies at least one of the following conditions: 12.9677≤ F8 / F ≤1397.2671, 0.7891≤d8 / (d8+SAG82-SAG81)≤1.1869, 0.3074≤D / TTL≤0.3243, 0.1060≤(d2+d3) / TTL≤0.1835, 0.3202≤D82 / TTL≤0.3734, 0.0433≤d78 / TTL≤0.1449, 0.0202≤R71 / R72≤0.9447, 2.4606≤R72 / d78≤384.4675, 0.5773≤ F5 / F6 ≤2.6631, 0.0348≤d23 / TTL≤0.1219, -1.3782≤F1 / F≤-1.1319, 4.0869≤F2 / F≤160.4574, <h2 style=";text-align:left;direction:ltr">1.6770≤<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> F3 / F<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> ≤23.1406, 1.2236≤F4 / F≤1.9881, 2.2311≤F7 / F≤15.3532, 1.4339≤ F56 / F ≤8.6395, 60.6630°≤(FOV×F) / H≤61.5807°, 0.0088≤D / H / FOV×1°≤0.0093, 2.8638≤TTL / H≤2.9258, 0.0791≤BFL / TL≤0.1296, 16.2696≤ R11 / F ≤1.2316E+17, 0.1333≤(1 / F4+1 / F56+1 / F7) / (1 / F)≤1.2734, -9.3384≤R32 / F≤-1.1958, 0.5965≤F / H≤0.6055, 0.0033≤d34 / TTL≤0.0057, 4.8010≤TTL / F≤4.8396, 1.6400≤F / ENPD≤1.8501, 0.9334≤D82 / H≤1.0884, Wherein, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the distance from the intersection of the second side surface of the eighth lens and the optical axis to the vertex of the effective radius of the second side surface of the eighth lens on the optical axis, SAG81 is the distance from the intersection of the first side surface of the eighth lens and the optical axis to the vertex of the effective radius of the first side surface of the eighth lens on the optical axis, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, d2 is the center thickness of the second lens on the optical axis, d3 is the center thickness of the third lens on the optical axis, D82 is the maximum clear aperture of the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, d78 is the air gap between the seventh lens and the eighth lens on the optical axis, R71 is the radius of curvature of the first side surface of the seventh lens, and R72 is the curvature of the second side surface of the seventh lens. radius, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, d23 is the air spacing between the second lens and the third lens on the optical axis, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, BFL is the optical back focus of the optical lens, TL is the distance from the center of the first side surface of the first lens to the center of the second side surface of the eighth lens on the optical axis, R11 is the curvature radius of the first side surface of the first lens, d34 is the air spacing between the third lens and the fourth lens on the optical axis, R32 is the curvature radius of the second side surface of the third lens, and ENPD is the entrance pupil diameter of the optical lens.

25. An electronic device, characterized in that: comprising an optical lens according to any one of claims 1-24; as well as The electronic device further comprises: at least one of an imaging element and a light source, wherein: The imaging element is used to convert the optical image formed by the optical lens into an electrical signal. The light emitted by the light source is projected onto the target area after passing through the optical lens to form an image or illuminate the area.

Images