Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device comprising the same. The optical lens comprises, in order from a first side to a second side along an optical axis: a first lens with negative refractive power, the first side of which is a convex surface and the second side of which is a concave surface; a second lens with negative refractive power, the first side of which is a concave surface and the second side of which is a concave surface; a third lens with refractive power; a fourth lens with positive refractive power, the first side of which is a convex surface; a fifth lens with positive refractive power, the second side of which is a convex surface; a sixth lens with positive refractive power, the first side of which is a convex surface and the second side of which is a convex surface; a seventh lens with negative refractive power, the first side of which is a concave surface and the second side of which is a convex surface; and an eighth lens with positive refractive power, the first side of which is a convex surface.

Description

Technical Field

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

[0002] With the continuous development of optical lens technology, the applications of optical lenses are becoming increasingly widespread. For example, optical lenses play an irreplaceable role in many fields such as smartphones, security monitoring, automotive driver assistance systems, intelligent detection, and virtual reality. At the same time, lens manufacturers in various fields are actively investing in and committed to researching and improving the performance and technology of optical lenses in order to enhance the quality and competitiveness of their products.

[0003] Thanks to the rapid development of automotive driver assistance systems in recent years, lenses have been widely used in automobiles. These include in-vehicle reversing camera systems, dashcams, automatic parking and panoramic parking systems, and route-finding systems. In-vehicle lenses are key components for acquiring external information in autonomous driving assistance systems. With the rapid development of these systems, the performance requirements for side-view optical lenses are increasing, moving towards higher resolution, wider field of view, lower distortion, and miniaturization. Simultaneously, as autonomous driving demands more for nighttime driving, the requirements for night vision capabilities in in-vehicle lenses are also rising. However, currently available optical lenses often struggle to simultaneously meet the requirements of high resolution and miniaturization. While some lenses can achieve megapixel resolution, they suffer from significant aberrations such as chromatic aberration, astigmatism, and distortion. Furthermore, ordinary lenses have limited light transmission capabilities, making them unsuitable for low-light environments such as nighttime or rainy days. In addition, currently available optical lenses often fail to simultaneously meet the requirements of small front-end diameter and miniaturization, as well as large aperture and high resolution.

[0004] Therefore, the market currently needs an optical lens with a large aperture, high relative illumination, and compact size to meet the performance requirements of automotive side-view applications. Summary of the Invention

[0005] This application provides an optical lens, which includes, in sequence along the optical axis from a first side to a second side: a first lens having negative optical power, wherein the first side is convex and the second side is concave; a second lens having negative optical power, wherein the first side is concave and the second side is concave; a third lens having optical power; a fourth lens having positive optical power, wherein the first side is convex; a fifth lens having positive optical power, wherein the second side is convex; a sixth lens having positive optical power, wherein the first side is convex and the second side is convex; a seventh lens having negative optical power, wherein the first side is concave and the second side is convex; and an eighth lens having positive optical power, wherein the first side is convex.

[0006] In one embodiment, the third lens has positive optical power, with a first concave side and a second convex side.

[0007] In one embodiment, the third lens has positive optical power, with its first side being a plane and its second side being a convex surface.

[0008] In one embodiment, the third lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

[0009] In one embodiment, the third lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0010] In one embodiment, the second side surface of the fourth lens is a convex surface.

[0011] In one embodiment, the second side surface of the fourth lens is concave.

[0012] In one embodiment, the first side surface of the fifth lens is convex.

[0013] In one embodiment, the first side surface of the fifth lens is a plane.

[0014] In one embodiment, the first side surface of the fifth lens is concave.

[0015] In one embodiment, the second side surface of the eighth lens is concave.

[0016] In one embodiment, the second side surface of the eighth lens is a convex surface.

[0017] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented lens.

[0018] In one embodiment, the optical lens further includes an aperture stop disposed between the fourth lens and the fifth lens.

[0019] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (TTL×180°) / (H×FOV)≤9.

[0020] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: TTL / H / θ≤2.6.

[0021] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy: (TTL×180°) / (F×FOV)≤36.

[0022] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfies the following radian value θ corresponding to the total effective focal length F of the optical lens and the maximum field of view of the optical lens: TTL / (F×θ)≤5.

[0023] In one embodiment, the radius of curvature R7 of the first side surface of the fourth lens and the effective focal length F4 of the fourth lens satisfy: R7 / F4≥0.05.

[0024] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the effective focal length F2 of the second lens satisfy: R3 / F2≥0.05.

[0025] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: F4 / F≥0.1.

[0026] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (D×180°) / (H×FOV)≤5.4.

[0027] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤1.5.

[0028] In one embodiment, the effective focal length F6 of the sixth lens and the effective focal length F7 of the seventh lens satisfy: -2≤F6 / F7≤-0.05.

[0029] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: F2 / F≤-0.1.

[0030] In one embodiment, the maximum field of view (FOV) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the total effective focal length (F) of the optical lens satisfy: 1 ​​≤ (FOV × H) / (F × 180°).

[0031] In one embodiment, the radian value θ corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 3≤(θ×H) / F.

[0032] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.8.

[0033] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.02≤|R3 / R4|≤5.

[0034] In one embodiment, the center thickness d6 of the sixth lens on the optical axis, the center thickness d7 of the seventh lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: (d6+d7) / TTL≤0.3.

[0035] In one embodiment, the total effective focal length F of the optical lens and the combined focal length F67 of the sixth lens and the seventh lens satisfy: -1≤F / F67≤1.

[0036] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens satisfy: 1.5≤R1 / F≤50.

[0037] In one embodiment, the effective focal length F2 of the second lens and the distance d45 from the center of the second side surface of the second lens to the center of the first side surface of the third lens on the optical axis satisfy: F2 / d45≤-0.5.

[0038] In one embodiment, the distance BFL from the center of the second side surface of the eighth lens to the imaging surface of the optical lens on the optical axis satisfies the condition that BFL / F ≥ 0.5.

[0039] In another aspect, this application provides an optical lens comprising, along the optical axis from a first side to a second side, the following: a first lens having negative optical power; a second lens having negative optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having negative optical power; and an eighth lens having positive optical power. The radius of curvature R3 of the first side surface of the second lens and the effective focal length F2 of the second lens satisfy: R3 / F2 ≥ 0.05.

[0040] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0041] In one embodiment, the first side surface of the second lens is concave, and the second side surface is concave.

[0042] In one embodiment, the third lens has positive optical power, with a first concave side and a second convex side.

[0043] In one embodiment, the third lens has positive optical power, with its first side being a plane and its second side being a convex surface.

[0044] In one embodiment, the third lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

[0045] In one embodiment, the third lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0046] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex.

[0047] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave.

[0048] In one embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex.

[0049] In one embodiment, the first side surface of the fifth lens is a plane, and the second side surface is a convex surface.

[0050] In one embodiment, the first side surface of the fifth lens is concave, and the second side surface is convex.

[0051] In one embodiment, the first side surface of the sixth lens is convex, and the second side surface is convex.

[0052] In one embodiment, the first side surface of the seventh lens is concave, and the second side surface is convex.

[0053] In one embodiment, the first side surface of the eighth lens is convex, and the second side surface is concave.

[0054] In one embodiment, the first side surface of the eighth lens is convex, and the second side surface is convex.

[0055] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented lens.

[0056] In one embodiment, the optical lens further includes an aperture stop disposed between the fourth lens and the fifth lens.

[0057] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (TTL×180°) / (H×FOV)≤9.

[0058] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: TTL / H / θ≤2.6.

[0059] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy: (TTL×180°) / (F×FOV)≤36.

[0060] In one embodiment, the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfies the following radian value θ corresponding to the total effective focal length F of the optical lens and the maximum field of view of the optical lens: TTL / (F×θ)≤5.

[0061] In one embodiment, the radius of curvature R7 of the first side surface of the fourth lens and the effective focal length F4 of the fourth lens satisfy: R7 / F4≥0.05.

[0062] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: F4 / F≥0.1.

[0063] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (D×180°) / (H×FOV)≤5.4.

[0064] In one embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤1.5.

[0065] In one embodiment, the effective focal length F6 of the sixth lens and the effective focal length F7 of the seventh lens satisfy: -2≤F6 / F7≤-0.05.

[0066] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: F2 / F≤-0.1.

[0067] In one embodiment, the maximum field of view (FOV) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the total effective focal length (F) of the optical lens satisfy: 1 ​​≤ (FOV × H) / (F × 180°).

[0068] In one embodiment, the radian value θ corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 3≤(θ×H) / F.

[0069] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.8.

[0070] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.02≤|R3 / R4|≤5.

[0071] In one embodiment, the center thickness d6 of the sixth lens on the optical axis, the center thickness d7 of the seventh lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: (d6+d7) / TTL≤0.3.

[0072] In one embodiment, the total effective focal length F of the optical lens and the combined focal length F67 of the sixth lens and the seventh lens satisfy: -1≤F / F67≤1.

[0073] In one embodiment, the radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens satisfy: 1.5≤R1 / F≤50.

[0074] In one embodiment, the effective focal length F2 of the second lens and the distance d45 from the center of the second side surface of the second lens to the center of the first side surface of the third lens on the optical axis satisfy: F2 / d45≤-0.5.

[0075] In one embodiment, the distance BFL from the center of the second side surface of the eighth lens to the imaging surface of the optical lens on the optical axis satisfies the condition that BFL / F ≥ 0.5.

[0076] This application also provides an electronic device. The electronic device includes an optical lens according to this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0077] This application employs eight lenses. By optimizing the shape and optical power of each lens, the optical lens achieves at least one beneficial effect, such as 3M high resolution, miniaturization, small aperture, large aperture (Fno=1.4), high relative illumination, low distortion, high illuminance, high light transmission, and large field of view (FOV=123°), enabling the optical lens to better meet the requirements of automotive side-view applications. Attached Figure Description

[0078] Other features, objects, and advantages of this application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0079] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0080] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0081] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0082] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0083] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0084] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0085] Figure 7 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 7 of this application;

[0086] Figure 8 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 8 of this application;

[0087] Figure 9 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 9 of this application;

[0088] Figure 10 To illustrate the structure of the optical lens according to Embodiment 10 of this application;

[0089] Figure 11To illustrate the structural schematic diagram of the optical lens according to Embodiment 11 of this application;

[0090] Figure 12 To illustrate the structure of the optical lens according to Embodiment 12 of this application;

[0091] Figure 13 To illustrate the structural schematic diagram of the optical lens according to Embodiment 13 of this application; and

[0092] Figure 14 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 14 of this application. Detailed Implementation

[0093] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the 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.

[0094] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0095] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0096] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging side is called the image-side surface of the lens.

[0097] It should be understood that the optical lens provided in this application can be used for both photography and projection. When the optical lens provided in this application is used as a camera lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the image side; when the optical lens provided in this application is used as a projection lens or a radar transmitting lens, the term "first side" as used herein may refer to the imaging side, and "second side" may refer to the image source side.

[0098] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0099] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0100] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0101] The features, principles and other aspects of this application are described in detail below.

[0102] 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 sequentially along the optical axis from the first side to the second side.

[0103] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0104] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a convex-concave surface. The first lens is designed in a meniscus shape to collect as much light as possible from a large field of view into the rear optical system, increasing light transmission and fixing the direction of large-angle light rays at the edges. The first lens has negative optical power, and its second side is concave towards the image side, which prevents excessive divergence of light from the first side, facilitating control of the aperture of the rear lens and enabling miniaturization. The first side of the first lens is designed as a convex surface, which in practical applications facilitates the sliding of water droplets, reducing their impact on imaging.

[0105] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex shape. The negative optical power of the second lens diverges light, allowing the light emitted from the second side of the first lens to have a larger light-receiving surface for subsequent optical systems under the same field of view. Simultaneously, the concave shape towards the first side causes a significant light deflection as light enters the second lens, altering the trend of large-angle light and facilitating a large field of view. Furthermore, it allows for a larger physical aperture, resulting in a larger light intake and increased image brightness. Moreover, the concave first side of the second lens, in conjunction with the concave second side of the first lens, alters the trajectory of peripheral light rays, reducing the lens's front aperture and overall size, thus contributing to miniaturization and cost reduction.

[0106] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a concave-convex surface or a plano-convex surface. The positive optical power of the third lens allows for a smooth transition of light to the fourth lens, which is beneficial for improving resolution. The second side surface of the third lens is convex, and in conjunction with the first side surface of the fourth lens being convex, light rays can be converged. This allows diverging light rays to smoothly enter the rear optical system and lowers the incident point on the subsequent optical system, reducing the rear aperture. Furthermore, the significant difference in shape between the second side surface of the third lens and the first side surface of the fourth lens significantly alters the light trajectory. With the same first side surface diameter of the third lens, the front aperture of the lens can be reduced, which is beneficial for lens miniaturization.

[0107] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. Positive focal length and a biconvex shape can converge light, and combined with the second side surface shape of the second lens, it facilitates the smooth entry of light into the rear lens, reducing sensitivity. Furthermore, the second side surface of the third lens differs significantly in shape from the first side surface of the fourth lens, resulting in a significant change in the light trajectory. With the same first side surface diameter of the third lens, the front aperture of the lens can be reduced, which is beneficial for lens miniaturization.

[0108] In an exemplary embodiment, the third lens may have negative optical power. The third lens may have a convex-concave surface. A negative focal length and a convex-concave shape allow light to enter the rear lens smoothly, improving resolution. Simultaneously, the first side surface of the third lens has a similar shape to the second side surface of the second lens, which smooths the light path between the second and third lenses. Therefore, the light emitted from the second lens is well received by the third lens, reducing light loss in each field of view and improving the relative illumination in each field of view.

[0109] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. By rationally optimizing the shape of the fourth lens, the angle of the incident light can be compressed to achieve a smooth transition of light rays, allowing diverging light rays to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. Furthermore, the significant difference in shape between the second side surface of the third lens and the first side surface of the fourth lens results in a significant alteration of the light path by the fourth lens. With the same aperture of the fourth lens, the front aperture of the lens can be reduced, which is beneficial for lens miniaturization.

[0110] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave surface. By reasonably optimizing the shape of the fourth lens, light entering through the third lens is collected, and positive optical power facilitates light convergence, resulting in a smooth transition of light path. Furthermore, the significant difference in shape between the second side surface of the third lens and the first side surface of the fourth lens leads to a significant change in the light path caused by the fourth lens. With the same aperture of the fourth lens, the front aperture of the lens can be reduced, which is beneficial for lens miniaturization.

[0111] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-convex surface or a plano-convex surface. Properly setting the optical power of the fifth lens can further reduce aberrations and improve image quality, while also ensuring that light rays converge effectively and smoothly at the final point, allowing the light to reach the image plane smoothly, which is beneficial for reducing CRA (Collateral Aberration).

[0112] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a concave-convex surface. Properly matching the shape of the fifth lens helps to smooth the light path, ensuring that the light emitted from the fourth lens is well received by the fifth lens, while simultaneously altering the light path to make the light from the rear system smoother and reduce system sensitivity.

[0113] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex surface. Properly setting the optical power of the sixth lens can further reduce aberrations, improve image quality, and optimize distortion; at the same time, it can also ensure that light rays converge effectively and smoothly at the final point, allowing the light to reach the imaging surface steadily, thus reducing overall weight and cost.

[0114] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-convex surface. The seventh lens is a negative lens, which has a diverging effect on light. Its first side surface is concave, which causes light to be deflected. It can effectively correct various aberrations caused by the front positive lens, improve image quality, and reduce optical performance such as distortion and CRA.

[0115] In an exemplary embodiment, the eighth lens may have positive optical power. The eighth lens may have a convex-concave or convex-convex shape. By appropriately matching the shape of the eighth lens, as much peripheral large-angle light as possible can smoothly transition to the rear optical system, thus correcting astigmatism and field curvature and improving the resolving power of the optical system.

[0116] In an exemplary embodiment, the sixth and seventh lenses can be cemented together to form a cemented lens. The use of a cemented lens allows light rays from the front lens to smoothly transition to the rear optical system, reducing the overall lens length. This enables sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. The advantages of cemented doublet lenses include: reduced air gap between the two lenses, reducing the overall system length; complementary dispersion between the two lenses, which helps reduce chromatic aberration and improve image quality; fewer assembly components between the two lenses, reducing processes and lowering costs; further, reduced field curvature, which can correct off-axis point aberrations of the system; and proper focal length allocation, which helps achieve thermal compensation and obtain good temperature performance.

[0117] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the fourth lens and the fifth lens. Disposing the aperture stop between the fourth and fifth lenses facilitates effective light convergence entering the optical system, reduces the lens aperture at the rear end of the optical system, and lowers the system's assembly sensitivity. In this embodiment, the aperture stop may be disposed near the second side of the fourth lens, near the first side of the fifth lens, or near the midpoint between the fourth and fifth lenses. However, it should be noted that the positions of the aperture stop disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be disposed at other positions as needed.

[0118] In an exemplary embodiment, the optical lens according to this application satisfies: (TTL×180°) / (H×FOV)≤9, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, TTL, H, and FOV further satisfy: (TTL×180°) / (H×FOV)≤7.56. Satisfying (TTL×180°) / (H×FOV)≤9, under the condition of the same imaging plane and the same image height, can effectively limit the length of the lens, which is beneficial to achieving lens miniaturization.

[0119] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / H / θ ≤ 2.6, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens. More specifically, TTL, H, and θ can further satisfy: TTL / H / θ ≤ 2.4. Satisfying TTL / H / θ ≤ 2.6, under the condition of the same imaging surface and the same image height, can effectively limit the length of the lens, which is beneficial to achieving lens miniaturization.

[0120] In an exemplary embodiment, the optical lens according to this application satisfies: (TTL×180°) / (F×FOV)≤36, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, F is the total effective focal length of the optical lens, and FOV is the maximum field of view of the optical lens. More specifically, TTL, F, and FOV can further satisfy: (TTL×180°) / (F×FOV)≤18. Satisfying (TTL×180°) / (F×FOV)≤36, under the condition of the same imaging plane and the same image height, can effectively limit the length of the lens, which is beneficial to achieving lens miniaturization.

[0121] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / (F×θ)≤5, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens. More specifically, TTL, F, and θ can further satisfy: TTL / (F×θ)≤4.5. Satisfying TTL / (F×θ)≤5, under the condition of the same imaging plane and the same image height, can effectively limit the length of the lens, which is beneficial to achieving lens miniaturization.

[0122] In an exemplary embodiment, the optical lens according to this application satisfies: R7 / F4 ≥ 0.05, where R7 is the radius of curvature of the first side surface of the fourth lens, and F4 is the effective focal length of the fourth lens. More specifically, R7 and F4 can further satisfy: R7 / F4 ≥ 0.1. Satisfying R7 / F4 ≥ 0.05 allows for a reasonable and optimized design of the shape of the fourth lens, further converging the diverging light rays after passing through the first, second, and third lenses, thereby further reducing the system aperture. The significant difference in shape between the first side surface of the fourth lens and the second side surface of the third lens results in a significant change in the light trajectory caused by the fourth lens. With the same aperture of the fourth lens, a reduction in the front aperture of the lens can be achieved.

[0123] In an exemplary embodiment, the optical lens according to this application satisfies: R3 / F2 ≥ 0.05, where R3 is the radius of curvature of the first side of the second lens, and F2 is the effective focal length of the second lens. More specifically, R3 and F2 can further satisfy: R3 / F2 ≥ 0.1. Satisfying R3 / F2 ≥ 0.05, and reasonably matching the shape of the second lens, results in a significant light reversal when light enters the second lens, changing the trend of large-angle light and helping to reduce the front aperture.

[0124] In an exemplary embodiment, the optical lens according to this application satisfies: F4 / F ≥ 0.1, where F4 is the effective focal length of the fourth lens and F is the total effective focal length of the optical lens. More specifically, F4 and F may further satisfy: F4 / F ≥ 0.5. Satisfying F4 / F ≥ 0.1 allows for a reasonable allocation of the optical power of the fourth lens, converging light rays. This ensures that diverging light rays can smoothly enter the rear optical system, while also lowering the position of the light rays incident on the subsequent optical system, reducing the rear port diameter, and facilitating miniaturization.

[0125] In an exemplary embodiment, the optical lens according to this application satisfies: (D×180°) / (H×FOV)≤5.4, where FOV is the maximum field of view of the optical lens, 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 H is the image height corresponding to the maximum field of view of the optical lens. More specifically, D, H, and FOV further satisfy: (D×180°) / (H×FOV)≤3.6. Satisfying (D×180°) / (H×FOV)≤5.4 allows for a smaller front aperture of the lens, which is beneficial for miniaturization.

[0126] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ ≤ 1.5, where D is the maximum 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 θ is the radian value corresponding to the maximum field of view of the optical lens. More specifically, D, H, and θ can further satisfy: D / H / θ ≤ 1.2. Satisfying D / H / θ ≤ 1.5 allows for a smaller front aperture of the lens, which is beneficial for miniaturization.

[0127] In an exemplary embodiment, the optical lens according to this application satisfies: -2≤F6 / F7≤-0.05, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens. More specifically, F6 and F7 further satisfy: -1.4≤F6 / F7≤-0.2. Satisfying -2≤F6 / F7≤-0.05, and rationally allocating the focal length of the cemented lens, helps to smooth the light transition, thereby improving resolution while correcting chromatic aberration.

[0128] In an exemplary embodiment, the optical lens according to this application satisfies: F2 / F ≤ -0.1, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens. More specifically, F2 and F may further satisfy: F2 / F ≤ -0.5. Satisfying F2 / F ≤ -0.1, and rationally allocating the focal length of the second lens, allows light to enter the optical system smoothly, while also facilitating light collection, ensuring sufficient light transmission, and improving resolution.

[0129] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ (FOV × H) / (F × 180°), where 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, and F is the total effective focal length of the optical lens. More specifically, FOV, H, and F further satisfy: 1.11 ≤ (FOV × H) / (F × 180°). Satisfying 1 ≤ (FOV × H) / (F × 180°) enables a large field of view, and with the same imaging plane, a smaller focal length is achieved, which helps to receive light at a larger angle and reduce distortion.

[0130] In an exemplary embodiment, the optical lens according to this application satisfies: 3 ≤ (θ × H) / F, where θ is the radian value 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 F is the total effective focal length of the optical lens. More specifically, θ, H, and F can further satisfy: 3.5 ≤ (θ × H) / F. Satisfying 3 ≤ (θ × H) / F enables a large field of view, and with the same imaging plane, a smaller focal length is achieved, which helps to receive light at a larger angle and reduce distortion.

[0131] In an exemplary embodiment, the optical lens according to this application satisfies: F / ENPD ≤ 1.8, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. More specifically, F and ENPD can further satisfy: F / ENPD ≤ 1.6. Satisfying F / ENPD ≤ 1.8 allows for a small FNO, which is beneficial for increasing light transmission.

[0132] In an exemplary embodiment, the optical lens according to this application satisfies: 0.02 ≤ |R3 / R4| ≤ 5, where R3 is the radius of curvature of the first side surface of the second lens, and R4 is the radius of curvature of the second side surface of the second lens. More specifically, R3 and R4 may further satisfy: 0.1 ≤ |R3 / R4| ≤ 2. Satisfying 0.02 ≤ |R3 / R4| ≤ 5, and reasonably setting the shape of the second lens, is beneficial for collecting more light and increasing the light transmission capability of the system.

[0133] In an exemplary embodiment, the optical lens according to this application satisfies: (d6+d7) / TTL≤0.3, where d6 is the center thickness of the sixth lens on the optical axis, d7 is the center thickness of the seventh lens on the optical axis, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens. More specifically, d6, d7, and TTL can further satisfy: (d6+d7) / TTL≤0.2. Satisfying (d6+d7) / TTL≤0.3, appropriately increasing the center thickness of the cemented lens within a certain range, is beneficial to enhancing its light control capability, allowing more light to enter the rear system, and improving relative illumination.

[0134] In an exemplary embodiment, the optical lens according to this application satisfies: -1 ≤ F / F67 ≤ 1, where F is the total effective focal length of the optical lens, and F67 is the combined focal length of the sixth and seventh lenses. More specifically, F and F67 further satisfy: -0.5 ≤ F / F67 ≤ 0.5. Satisfying -1 ≤ F / F67 ≤ 1, and appropriately matching the focal length of the cemented lens elements, helps more light to enter smoothly, thus improving illumination.

[0135] In an exemplary embodiment, the optical lens according to this application satisfies: 1.5 ≤ R1 / F ≤ 50, where R1 is the radius of curvature of the first side of the first lens, and F is the total effective focal length of the optical lens. More specifically, R1 and F can further satisfy: 2 ≤ R1 / F ≤ 20. Satisfying 1.5 ≤ R1 / F ≤ 50, and rationally designing the radius of curvature of the first lens, on the one hand, makes the first lens lens farther away from the image plane, and the corresponding image height under the same field of view increases, which helps to receive light at a larger angle and reduce distortion; on the other hand, the light passing through the first lens does not undergo a steep bend, which can reduce tolerance sensitivity.

[0136] In an exemplary embodiment, the optical lens according to this application satisfies: F2 / d45 ≤ -0.5, where F2 is the effective focal length of the second lens, and d45 is the distance along the optical axis from the center of the second side surface of the second lens to the center of the first side surface of the third lens. More specifically, F2 and d45 can further satisfy: F2 / d45 ≤ -2. Satisfying F2 / d45 ≤ -0.5 effectively controls the lens spacing between the second and third lenses, reducing the angle between the light rays and the optical axis, thereby reducing the tolerance sensitivity of the third lens.

[0137] In an exemplary embodiment, the optical lens according to this application satisfies: BFL / F ≥ 0.5, where BFL is the distance on the optical axis from the center of the second side of the eighth lens to the imaging plane of the optical lens, and F is the total effective focal length of the optical lens. More specifically, BFL and F can further satisfy: BFL / F ≥ 0.65. Satisfying BFL / F ≥ 0.5, while achieving miniaturization, results in a longer back focal length of the lens, which is beneficial for module assembly.

[0138] In an exemplary embodiment, the optical lens of this application may further include a filter and / or protective glass disposed between the eighth lens and the imaging plane, as needed. The filter can filter light with a specific wavelength, while the protective glass can prevent damage to the second-side components (e.g., chips) of the optical lens.

[0139] In an exemplary embodiment, the first lens may be a spherical lens or an aspherical lens; the second lens may be a spherical lens or an aspherical lens; the third lens may be a spherical lens or an aspherical lens; the fourth lens may be a spherical lens or an aspherical lens; the fifth lens may be a spherical lens or an aspherical lens; the sixth lens may be a spherical lens or an aspherical lens; the seventh lens may be a spherical lens or an aspherical lens; and the eighth lens may be a spherical lens or an aspherical lens. This application does not specifically limit the number of spherical and aspherical lenses; when resolving quality is a primary concern, the number of aspherical lenses can be increased. Specifically, to improve the resolving quality of the optical system, the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses may all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving the image quality of the lens. The use of aspherical lenses helps correct system aberrations and improves resolving power.

[0140] In an exemplary embodiment, the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids problems such as lens blurring caused by high and low temperature variations in the operating environment, and prevents interference with normal lens use. Specifically, when temperature performance and resolution quality are of paramount importance, the first to eighth lenses can all be aspherical glass lenses. In applications with lower temperature stability requirements, the first to eighth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Of course, the first to eighth lenses in the optical lens can also be made of a combination of plastic and glass.

[0141] The optical lens according to the above embodiments of this application achieves at least one beneficial effect by reasonably setting parameters such as the shape of each lens and optical power, such as high resolution (3M), miniaturization, small aperture, large aperture (Fno=1.4), high relative illumination, low distortion, high illuminance, high light transmission, and large field of view (FOV=123°), so that the optical lens can better meet the requirements of automotive side view applications.

[0142] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to including eight lenses. If desired, the optical lens may also include other numbers of lenses. Specific embodiments of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0143] Example 1

[0144] The following is for reference Figure 1 An optical lens according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown.

[0145] like Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0146] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a plano-convex lens with positive optical power, its first side surface S5 is flat, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a plano-convex lens with positive optical power, its first side surface S10 is flat, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0147] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0148] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0149] Table 1 shows the radius of curvature R, thickness / distance d (it should be understood that the thickness / distance d in the row where S1 is located is the center thickness d1 of the first lens L1, the thickness / distance d in the row where S2 is located is the distance between the first lens L1 and the second lens L2, and so on), refractive index N, and Abbe number Vd of each lens of the optical lens of Embodiment 1.

[0150]

[0151]

[0152] Table 1

[0153] Example 2

[0154] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0155] like Figure 2 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0156] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a plano-convex lens with positive optical power, its first side surface S5 is flat, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a plano-convex lens with positive optical power, its first side surface S10 is flat, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0157] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0158] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0159] Table 2 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 2.

[0160]

[0161]

[0162] Table 2

[0163] Example 3

[0164] The following is for reference Figure 3 An optical lens according to Embodiment 3 of this application is described. Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown.

[0165] like Figure 3 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0166] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-concave lens with negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0167] The optical lens may also include an aperture stop STO, which can be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lenses at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO can be positioned at the midpoint between the fourth lens L4 and the fifth lens L5.

[0168] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0169] Table 3 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 3.

[0170]

[0171] Table 3

[0172] Example 4

[0173] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0174] like Figure 4 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0175] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-concave lens with negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0176] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0177] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0178] Table 4 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 4.

[0179]

[0180]

[0181] Table 4

[0182] Example 5

[0183] The following is for reference Figure 5 An optical lens according to Embodiment 5 of this application is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0184] like Figure 5 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0185] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0186] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0187] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0188] Table 5 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 5.

[0189]

[0190]

[0191] Table 5

[0192] Example 6

[0193] The following is for reference Figure 6 An optical lens according to Embodiment 6 of this application is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown.

[0194] like Figure 6 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0195] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0196] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0197] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0198] Table 6 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 6.

[0199]

[0200] Table 6

[0201] Example 7

[0202] The following is for reference Figure 7 An optical lens according to Embodiment 7 of this application is described. Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown.

[0203] like Figure 7 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0204] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0205] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0206] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0207] Table 7 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 7.

[0208]

[0209]

[0210] Table 7

[0211] Example 8

[0212] The following is for reference Figure 8 An optical lens according to Embodiment 8 of this application is described. Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown.

[0213] like Figure 8 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0214] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0215] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0216] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0217] Table 8 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 8.

[0218]

[0219]

[0220] Table 8

[0221] Example 9

[0222] The following is for reference Figure 9 An optical lens according to Embodiment 9 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown.

[0223] like Figure 9 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0224] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0225] The optical lens may also include an aperture stop STO, which can be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5 near the second side surface S8 of the fourth lens L4.

[0226] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0227] Table 9 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 9.

[0228]

[0229] Table 9

[0230] Example 10

[0231] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this application is described. Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown.

[0232] like Figure 10 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0233] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a concave-convex lens with positive optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0234] The optical lens may also include an aperture stop STO, which can be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5 near the second side surface S8 of the fourth lens L4.

[0235] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0236] Table 10 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 10.

[0237]

[0238]

[0239] Table 10

[0240] Example 11

[0241] The following is for reference Figure 11 An optical lens according to Embodiment 11 of this application is described. Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown.

[0242] like Figure 11 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0243] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0244] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0245] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0246] Table 11 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 11.

[0247]

[0248] Table 11

[0249] Example 12

[0250] The following is for reference Figure 12 An optical lens according to Embodiment 12 of this application is described. Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown.

[0251] like Figure 12 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0252] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being convex.

[0253] The optical lens may also include an aperture stop STO, which may be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO may be positioned between the fourth lens L4 and the fifth lens L5 near the first side surface S10 of the fifth lens L5.

[0254] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0255] Table 12 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 12.

[0256]

[0257] Table 12

[0258] Example 13

[0259] The following is for reference Figure 13 An optical lens according to Embodiment 13 of this application is described. Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown.

[0260] like Figure 13 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0261] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-concave lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0262] The optical lens may also include an aperture stop STO, which can be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5 near the second side surface S8 of the fourth lens L4.

[0263] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0264] Table 13 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 13.

[0265]

[0266]

[0267] Table 13

[0268] Example 14

[0269] The following is for reference Figure 14 An optical lens according to Embodiment 14 of this application is described. Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown.

[0270] like Figure 14 As shown, the optical lens includes, in sequence from the first side to the second side, 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.

[0271] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-concave lens with positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0272] The optical lens may also include an aperture stop STO, which can be positioned between the fourth lens L4 and the fifth lens L5 to effectively converge the light entering the optical system, reduce the aperture of the lens at the rear of the optical system, and decrease the assembly sensitivity of the system. For example, the aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5 near the second side surface S8 of the fourth lens L4.

[0273] Optionally, the optical lens may further include a filter L9 having a first side surface S17 and a second side surface S18, and a protective glass L10 having a first side surface S19 and a second side surface S20. The filter L9 can filter light of a certain wavelength, and the protective glass L10 can be used to protect components located on the second side of the optical lens, such as an image sensor chip (IMA). When the optical lens is used for imaging, light from the object passes sequentially through surfaces S1 to S20 and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes sequentially through surfaces S20 to S1 and is finally projected onto the target object (not shown).

[0274] Table 14 shows the radius of curvature R, thickness / distance d, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 14.

[0275]

[0276] Table 14

[0277] In summary, Examples 1 to 14 satisfy the relationships shown in Tables 15-1, 15-2, and 15-3 respectively. In Tables 15-1, 15-2, and 15-3, the units of TTL, F, D, H, ENPD, BFL, F2, F4, F6, F7, F67, d6, d7, d45, R1, R3, R4, and R7 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0278]

[0279]

[0280] Table 15-1

[0281]

[0282]

[0283]

[0284] Table 15-2

[0285]

[0286]

[0287] Table 15-3

[0288] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device, such as a rangefinder camera, or an imaging module integrated into a rangefinder device. Furthermore, the electronic device may also be a stand-alone imaging device, such as an in-vehicle camera, or an imaging module integrated into a driver assistance system, such as a vehicle-mounted camera.

[0289] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: A first lens with negative optical power has a first side surface that is convex and a second side surface that is concave. A second lens with negative optical power has a first concave side and a second concave side. A third lens with optical power; The fourth lens with positive optical power has a convex first side surface; The fifth lens with positive optical power has a convex second side surface; The sixth lens with positive optical power has a convex first side and a convex second side. A seventh lens with negative optical power, its first side surface being concave and its second side surface being convex; and The eighth lens, which has positive optical power, has a convex first side surface; The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 12.24≤(TTL×180°) / (F×FOV)≤36.

2. The optical lens according to claim 1, characterized in that, The third lens has positive optical power, with its first side being concave and its second side being convex.

3. The optical lens according to claim 1, characterized in that, The third lens has positive optical power, with its first side being a plane and its second side being a convex surface.

4. The optical lens according to claim 1, characterized in that, The third lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

5. The optical lens according to claim 1, characterized in that, The third lens has negative optical power, with its first side being convex and its second side being concave.

6. The optical lens according to claim 1, characterized in that, The second side surface of the fourth lens is convex.

7. The optical lens according to claim 1, characterized in that, The second side surface of the fourth lens is concave.

8. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is convex.

9. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is a plane.

10. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is concave.

11. The optical lens according to claim 1, characterized in that, The second side surface of the eighth lens is concave.

12. The optical lens according to claim 1, characterized in that, The second side surface of the eighth lens is convex.

13. The optical lens according to claim 1, characterized in that, The sixth lens and the seventh lens are cemented together to form a cemented lens.

14. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop disposed between the fourth lens and the fifth lens.

15. The optical lens according to any one of claims 1-14, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 6.12≤(TTL×180°) / (H×FOV)≤9.

16. The optical lens according to any one of claims 1-14, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 1.943≤TTL / H / θ≤2.

6.

17. The optical lens according to any one of claims 1-14, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 3.879≤TTL / (F×θ)≤5.

18. The optical lens according to any one of claims 1-14, characterized in that, The radius of curvature R7 of the first side surface of the fourth lens and the effective focal length F4 of the fourth lens satisfy the following condition: 2.077≥R7 / F4≥0.

05.

19. The optical lens according to any one of claims 1-14, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the effective focal length F2 of the second lens satisfy: 1.353≥R3 / F2≥0.

05.

20. The optical lens according to any one of claims 1-14, characterized in that, The effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy the following condition: 3.910≥F4 / F≥0.

1.

21. The optical lens according to any one of claims 1-14, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 2.52≤(D×180°) / (H×FOV)≤5.

4.

22. The optical lens according to any one of claims 1-14, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 0.807≤D / H / θ≤1.

5.

23. The optical lens according to any one of claims 1-14, characterized in that, The effective focal length F6 of the sixth lens and the effective focal length F7 of the seventh lens satisfy the following condition: -2≤F6 / F7≤-0.

05.

24. The optical lens according to any one of claims 1-14, characterized in that, The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -2.244≤F2 / F≤-0.

1.

25. The optical lens according to any one of claims 1-14, characterized in that, The maximum field of view (FOV) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the total effective focal length (F) of the optical lens satisfy the following: 1 ≤ (FOV × H) / (F × 180°) ≤ 1.

374.

26. The optical lens according to any one of claims 1-14, characterized in that, The radian value θ corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 3≤(θ×H) / F≤4.

317.

27. The optical lens according to any one of claims 1-14, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.440≤F / ENPD≤1.

8.

28. The optical lens according to any one of claims 1-14, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.02 ≤ R3 / R4 ≤5.

29. The optical lens according to any one of claims 1-14, characterized in that, The center thickness d6 of the sixth lens on the optical axis, the center thickness d7 of the seventh lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.089≤(d6+d7) / TTL≤0.

3.

30. The optical lens according to any one of claims 1-14, characterized in that, The total effective focal length F of the optical lens and the combined focal length F67 of the sixth and seventh lenses satisfy the following condition: -1≤F / F67≤1.

31. The optical lens according to any one of claims 1-14, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens satisfy: 1.5≤R1 / F≤50.

32. The optical lens according to any one of claims 1-14, characterized in that, The effective focal length F2 of the second lens and the distance d45 from the center of the second side surface of the second lens to the center of the first side surface of the third lens on the optical axis satisfy: F2 / d45≤-0.

5.

33. The optical lens according to any one of claims 1-7, characterized in that, The distance BFL from the center of the second side of the eighth lens to the imaging surface of the optical lens on the optical axis satisfies the following condition: 1.269 ≥ BFL / F ≥ 0.

5.

34. An optical lens, characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: A first lens with negative optical power; A second lens with negative optical power; A third lens with optical power; A fourth lens with positive optical power; A fifth lens with positive optical power; A sixth lens with positive optical power; A seventh lens with negative optical power; and The eighth lens with positive optical power. The radius of curvature R3 of the first side surface of the second lens and the effective focal length F2 of the second lens satisfy: 1.353≥R3 / F2≥0.05; The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the maximum field of view FOV of the optical lens satisfy: 12.24≤(TTL×180°) / (F×FOV)≤36.

35. The optical lens according to claim 34, characterized in that, The first side of the first lens is convex, and the second side is concave.

36. The optical lens according to claim 34, characterized in that, The first side surface of the second lens is concave, and the second side surface is concave.

37. The optical lens according to claim 34, characterized in that, The third lens has positive optical power, with its first side being concave and its second side being convex.

38. The optical lens according to claim 34, characterized in that, The third lens has positive optical power, with its first side being a plane and its second side being a convex surface.

39. The optical lens according to claim 34, characterized in that, The third lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

40. The optical lens according to claim 34, characterized in that, The third lens has negative optical power, with its first side being convex and its second side being concave.

41. The optical lens according to claim 34, characterized in that, The first side surface of the fourth lens is convex, and the second side surface is convex.

42. The optical lens according to claim 34, characterized in that, The first side of the fourth lens is convex, and the second side is concave.

43. The optical lens according to claim 34, characterized in that, The first side surface of the fifth lens is convex, and the second side surface is convex.

44. The optical lens according to claim 34, characterized in that, The first side of the fifth lens is a plane, and the second side is a convex surface.

45. The optical lens according to claim 34, characterized in that, The first side of the fifth lens is concave, and the second side is convex.

46. ​​The optical lens according to claim 34, characterized in that, The first side surface of the sixth lens is convex, and the second side surface is convex.

47. The optical lens according to claim 34, characterized in that, The first side of the seventh lens is concave, and the second side is convex.

48. The optical lens according to claim 34, characterized in that, The first side of the eighth lens is convex, and the second side is concave.

49. The optical lens according to claim 34, characterized in that, The first side surface of the eighth lens is convex, and the second side surface is convex.

50. The optical lens according to claim 34, characterized in that, The sixth lens and the seventh lens are cemented together to form a cemented lens.

51. The optical lens according to claim 34, characterized in that, The optical lens also includes an aperture stop disposed between the fourth lens and the fifth lens.

52. The optical lens according to any one of claims 34-51, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 6.12≤(TTL×180°) / (H×FOV)≤9.

53. The optical lens according to any one of claims 34-51, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 1.943≤TTL / H / θ≤2.

6.

54. The optical lens according to any one of claims 34-51, characterized in that, The distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 3.879≤TTL / (F×θ)≤5.

55. The optical lens according to any one of claims 34-51, characterized in that, The radius of curvature R7 of the first side surface of the fourth lens and the effective focal length F4 of the fourth lens satisfy the following condition: 2.077≥R7 / F4≥0.

05.

56. The optical lens according to any one of claims 34-51, characterized in that, The effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy the following condition: 3.910≥F4 / F≥0.

1.

57. The optical lens according to any one of claims 34-51, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 2.52≤(D×180°) / (H×FOV)≤5.

4.

58. The optical lens according to any one of claims 34-51, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: 0.807≤D / H / θ≤1.

5.

59. The optical lens according to any one of claims 34-51, characterized in that, The effective focal length F6 of the sixth lens and the effective focal length F7 of the seventh lens satisfy the following condition: -2≤F6 / F7≤-0.

05.

60. The optical lens according to any one of claims 34-51, characterized in that, The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -2.244≤F2 / F≤-0.

1.

61. The optical lens according to any one of claims 34-51, characterized in that, The maximum field of view (FOV) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the total effective focal length (F) of the optical lens satisfy the following: 1 ≤ (FOV × H) / (F × 180°) ≤ 1.

374.

62. The optical lens according to any one of claims 34-51, characterized in that, The radian value θ corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 3≤(θ×H) / F≤4.

317.

63. The optical lens according to any one of claims 34-51, characterized in that, The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.440≤F / ENPD≤1.

8.

64. The optical lens according to any one of claims 34-51, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.02 ≤ R3 / R4 ≤5.

65. The optical lens according to any one of claims 34-51, characterized in that, The center thickness d6 of the sixth lens on the optical axis, the center thickness d7 of the seventh lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.089≤(d6+d7) / TTL≤0.

3.

66. The optical lens according to any one of claims 34-51, characterized in that, The total effective focal length F of the optical lens and the combined focal length F67 of the sixth and seventh lenses satisfy the following condition: -1≤F / F67≤1.

67. The optical lens according to any one of claims 34-51, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens satisfy: 1.5≤R1 / F≤50.

68. The optical lens according to any one of claims 34-51, characterized in that, The effective focal length F2 of the second lens and the distance d45 from the center of the second side surface of the second lens to the center of the first side surface of the third lens on the optical axis satisfy: F2 / d45≤-0.

5.

69. The optical lens according to any one of claims 34-51, characterized in that, The distance BFL from the center of the second side of the eighth lens to the imaging surface of the optical lens on the optical axis satisfies the following condition: 1.269 ≥ BFL / F ≥ 0.

5.

70. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-69 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images