Optical lens and electronic device

Abstract

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

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 rapid development of autonomous driving, automotive lenses, as key components of automated driving assistance systems, have also experienced rapid growth. Firstly, many vehicle manufacturers, considering factors such as vehicle aesthetics and ease of assembly, have placed higher demands on the miniaturization and small aperture of automotive lenses. Secondly, with the rise of markets for forward-looking cameras, surround-view cameras, driver assistance systems, and autonomous driving, automotive lenses are increasingly used in automotive driver assistance systems, thus requiring them to keep pace with chip development and achieve megapixel resolution, placing higher demands on the lenses' high resolution capabilities. Simultaneously, to meet the requirements of safe driving, automotive lenses have more specific requirements compared to ordinary optical lenses. For example, to adapt to low-light driving environments such as nighttime or rainy days, lenses need strong light transmission capabilities; and to avoid ghosting that could cause automated driving assistance systems to misjudge real road conditions, lenses need to have low ghosting performance.

[0003] However, current optical lenses on the market still suffer from several problems, making it difficult to meet and achieve the aforementioned requirements. First, regarding high resolution: while existing technologies can achieve megapixel clarity, aberrations such as chromatic aberration, astigmatism, and distortion are quite severe. Second, regarding miniaturization and small front-end aperture: current technologies typically struggle to simultaneously meet the requirements of small front-end aperture and miniaturization. Third, regarding high light throughput: current technologies often cannot guarantee high light throughput, making them unsuitable for dark environments such as nighttime or rainy days. Fourth, regarding ghosting: current technologies cannot yet meet the ghosting-free requirements of autonomous driving, as ghosting can easily lead to misjudgments of road conditions by autonomous driving assistance systems. Finally, regarding low sensitivity, current technologies still cannot achieve stable, low-sensitivity lens imaging levels.

[0004] Therefore, in response to the above problems and the current state of development of optical lenses, those skilled in the art are dedicated to designing and developing optical lenses with one or more characteristics such as high resolution, miniaturization, small aperture, low sensitivity, high light transmission, long focal length, low distortion, and high performance, so as to better apply them to, for example, automotive forward-looking camera systems and meet the ever-growing high requirements of market 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 positive optical power; a second lens having optical power, wherein the first side is convex and the second side is concave; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having negative optical power; wherein the sixth lens and the seventh lens have optical power properties that are opposite in sign.

[0006] In one embodiment, the first side surface of the first lens is convex, and the second side surface is either concave or convex.

[0007] In one embodiment, the second lens has negative or positive optical power.

[0008] In one embodiment, the third lens has negative or positive optical power, with its first side surface being concave and its second side surface being convex.

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

[0010] In one embodiment, the fifth lens has positive optical power, with its first side surface being convex and its second side surface being convex; or the fifth lens has negative optical power, with its first side surface being concave and its second side surface being convex.

[0011] In one embodiment, the sixth lens has negative optical power, with its first side being convex and its second side being concave; or the sixth lens has positive optical power, with its first side being convex and its second side being convex.

[0012] In one embodiment, the seventh lens has positive optical power, with its first side being convex and its second side being concave or flat; or the seventh lens has negative optical power, with its first side being concave and its second side being concave, convex, or flat.

[0013] In one embodiment, the first side of the eighth lens is concave, and the second side is concave, convex, or planar.

[0014] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0015] In one embodiment, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

[0016] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0017] In one embodiment, the fourth lens and the fifth lens have opposite optical power properties.

[0018] 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 condition: TTL / F≤3.5.

[0019] 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≤2.

[0020] In one embodiment, the radius of curvature R32 of the second side surface of the third lens and the total effective focal length F of the optical lens satisfy: -8≤R32 / F<0.

[0021] In one embodiment, the optical lens satisfies: -4≤R32 / F≤-0.2.

[0022] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: 0 <R41 / F≤5。

[0023] In one embodiment, the optical lens satisfies: 0.3 ≤ R41 / F ≤ 3.5.

[0024] In one embodiment, the radius of curvature R52 of the second side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -8≤R52 / F<0.

[0025] In one embodiment, the optical lens satisfies: -4≤R52 / F≤-0.3.

[0026] In one embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the total effective focal length F of the optical lens satisfy: 0 <R61 / F≤8。

[0027] In one embodiment, the optical lens satisfies: 0.3≤R61 / F≤5.

[0028] In one embodiment, the radius of curvature R21 of the first side surface of the second lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0 <R21 / F≤7。

[0029] In one embodiment, the optical lens satisfies: 0.25≤R21 / F≤5.

[0030] In one embodiment, the radius of curvature R22 of the second side surface of the second lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0 <R22 / F≤8。

[0031] In one embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -4≤F8 / F<0.

[0032] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 0.5 ≤ F1 / F.

[0033] In one embodiment, the radius of curvature R62 of the second side surface of the sixth lens and the radius of curvature R71 of the first side surface of the seventh lens satisfy: 0.7≤R62 / R71≤1.3.

[0034] In one embodiment, the air gap d67 between the sixth lens and 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: d67 / TTL≤0.05.

[0035] In one embodiment, the combined focal length F67 of the sixth lens and the seventh lens satisfies the condition that F67 / F ≤ 10 with respect to the total effective focal length F of the optical lens.

[0036] In one embodiment, the radius of curvature R42 of the second side surface of the fourth lens and the radius of curvature R51 of the first side surface of the fifth lens satisfy: 0.7≤R42 / R51≤1.3.

[0037] In one embodiment, the air gap d45 between the fourth lens and the fifth 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: d45 / TTL≤0.05.

[0038] In one embodiment, the combined focal length F45 of the fourth lens and the fifth lens satisfies the condition that F45 / F ≤ 5 with the total effective focal length F of the optical lens.

[0039] In one embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy: 45° ≤ (FOV × F) / H.

[0040] In one embodiment, the optical lens satisfies: 50°≤(FOV×F) / H≤80°.

[0041] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.0≤F / H≤2.5.

[0042] In one embodiment, the radius of curvature R11 of the first side of the first lens, the maximum effective aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature R12 of the second side of the first lens, and the maximum effective aperture D2 of the second side of the first lens corresponding to the maximum field of view of the optical lens satisfy: |(R11 / D1) / (R12 / D2)|≤1.5.

[0043] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum effective aperture (D1) 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 condition: D1 / H / FOV≤0.1.

[0044] 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 / H / FOV≤0.2.

[0045] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, 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: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5.

[0046] In one embodiment, the radius of curvature R22 of the second side surface of the second lens and the radius of curvature R31 of the first side surface of the third lens satisfy: -12 <R22 / R31<0。

[0047] In one embodiment, the optical lens satisfies: -9≤R22 / R31≤-0.3.

[0048] In one embodiment, the air gap d23 between the second lens and the third 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: 0.1≤d23 / TTL≤0.5.

[0049] In one embodiment, the radius of curvature R32 of the second side surface of the third lens and the radius of curvature R41 of the first side surface of the fourth lens satisfy: -2.0≤R32 / R41≤-0.1.

[0050] 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 positive optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having negative optical power; wherein the radius of curvature R21 of the first side surface of the second lens and the total effective focal length F of the optical lens satisfy: 0 < R21 / F ≤ 7; and the radius of curvature R62 of the second side surface of the sixth lens and the radius of curvature R71 of the first side surface of the seventh lens satisfy: 0.7 ≤ R62 / R71 ≤ 1.3.

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

[0052] In one embodiment, the second lens has negative or positive optical power, with its first side surface being convex and its second side surface being concave.

[0053] In one embodiment, the third lens has negative or positive optical power, with its first side surface being concave and its second side surface being convex.

[0054] In one embodiment, the fourth lens has positive optical power, with its first side surface being convex and its second side surface being convex; or the fourth lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0055] In one embodiment, the fifth lens has positive optical power, with its first side surface being convex and its second side surface being convex; or the fifth lens has negative optical power, with its first side surface being concave and its second side surface being convex.

[0056] In one embodiment, the sixth lens has negative optical power, with its first side being convex and its second side being concave; or the sixth lens has positive optical power, with its first side being convex and its second side being convex.

[0057] In one embodiment, the seventh lens has positive optical power, with its first side being convex and its second side being concave or flat; or the seventh lens has negative optical power, with its first side being concave and its second side being concave, convex, or flat.

[0058] In one embodiment, the first side of the eighth lens is concave, and the second side is concave, convex, or planar.

[0059] In one embodiment, the optical lens further includes an aperture stop disposed between the second lens and the third lens.

[0060] In one embodiment, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

[0061] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0062] In one embodiment, the fourth lens and the fifth lens have opposite optical power properties.

[0063] 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 condition: TTL / F≤3.5.

[0064] 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≤2.

[0065] In one embodiment, the radius of curvature R32 of the second side surface of the third lens and the total effective focal length F of the optical lens satisfy: -8≤R32 / F<0.

[0066] In one embodiment, the optical lens satisfies: -4≤R32 / F≤-0.2.

[0067] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: 0 <R41 / F≤5。

[0068] In one embodiment, the optical lens satisfies: 0.3 ≤ R41 / F ≤ 3.5.

[0069] In one embodiment, the radius of curvature R52 of the second side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -8≤R52 / F<0.

[0070] In one embodiment, the optical lens satisfies: -4≤R52 / F≤-0.3.

[0071] In one embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the total effective focal length F of the optical lens satisfy: 0 <R61 / F≤8。

[0072] In one embodiment, the optical lens satisfies: 0.3≤R61 / F≤5.

[0073] In one embodiment, the optical lens satisfies: 0.25≤R21 / F≤5.

[0074] In one embodiment, the radius of curvature R22 of the second side surface of the second lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0 <R22 / F≤8。

[0075] In one embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -4≤F8 / F<0.

[0076] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 0.5 ≤ F1 / F.

[0077] In one embodiment, the air gap d67 between the sixth lens and 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: d67 / TTL≤0.05.

[0078] In one embodiment, the combined focal length F67 of the sixth lens and the seventh lens satisfies the condition that F67 / F ≤ 10 with respect to the total effective focal length F of the optical lens.

[0079] In one embodiment, the radius of curvature R42 of the second side surface of the fourth lens and the radius of curvature R51 of the first side surface of the fifth lens satisfy: 0.7≤R42 / R51≤1.3.

[0080] In one embodiment, the air gap d45 between the fourth lens and the fifth 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: d45 / TTL≤0.05.

[0081] In one embodiment, the combined focal length F45 of the fourth lens and the fifth lens satisfies the condition that F45 / F ≤ 5 with the total effective focal length F of the optical lens.

[0082] In one embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy: 45° ≤ (FOV × F) / H.

[0083] In one embodiment, the optical lens satisfies: 50°≤(FOV×F) / H≤80°.

[0084] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.0≤F / H≤2.5.

[0085] In one embodiment, the radius of curvature R11 of the first side of the first lens, the maximum effective aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature R12 of the second side of the first lens, and the maximum effective aperture D2 of the second side of the first lens corresponding to the maximum field of view of the optical lens satisfy: |(R11 / D1) / (R12 / D2)|≤1.5.

[0086] In one embodiment, the maximum field of view (FOV) of the optical lens, the maximum effective aperture (D1) 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 condition: D1 / H / FOV≤0.1.

[0087] 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 / H / FOV≤0.2.

[0088] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, 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: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5.

[0089] In one embodiment, the radius of curvature R22 of the second side surface of the second lens and the radius of curvature R31 of the first side surface of the third lens satisfy: -12 <R22 / R31<0。

[0090] In one embodiment, the optical lens satisfies: -9≤R22 / R31≤-0.3.

[0091] In one embodiment, the air gap d23 between the second lens and the third 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: 0.1≤d23 / TTL≤0.5.

[0092] In one embodiment, the radius of curvature R32 of the second side surface of the third lens and the radius of curvature R41 of the first side surface of the fourth lens satisfy: -2.0≤R32 / R41≤-0.1.

[0093] In another aspect, this application provides an electronic device including 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.

[0094] 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 high resolution, miniaturization, small aperture, low sensitivity, high light transmission, long focal length, low distortion, and high performance, enabling the optical lens to better meet the high requirements of automotive front-view lens applications. Attached Figure Description

[0095] 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:

[0096] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0097] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0098] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0099] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0100] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0101] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0102] Figure 7 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 7 of this application;

[0103] Figure 8 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 8 of this application;

[0104] Figure 9 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 9 of this application;

[0105] Figure 10 To illustrate the structure of the optical lens according to Embodiment 10 of this application;

[0106] Figure 11 To illustrate the structural schematic diagram of the optical lens according to Embodiment 11 of this application;

[0107] Figure 12 To illustrate the structure of the optical lens according to Embodiment 12 of this application;

[0108] Figure 13To illustrate the structural schematic diagram of the optical lens according to Embodiment 13 of this application; and

[0109] Figure 14 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 14 of this application. Detailed Implementation

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] The features, principles and other aspects of this application are described in detail below.

[0119] 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.

[0120] 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).

[0121] In an exemplary embodiment, the optical lens may further include a filter disposed between the eighth lens and the imaging plane. The filter can filter light with a specific wavelength.

[0122] In an exemplary embodiment, the first lens may have positive optical power. The first lens may have a convex-concave surface. The first lens has positive optical power, and its first side surface (object side surface) is convex, which converges light rays. The first lens may also be made of a high refractive index material, which helps to reduce the front aperture and achieve miniaturization. The convexity of the first side surface (object side surface) facilitates the collection of light rays into the optical system, which helps to improve the overall light transmission and illumination of the lens. The concave surface of the second side surface (image side surface) of the first lens allows the light rays entering through the first side surface (object side surface) of the first lens to diverge appropriately, and further allows the light rays exiting through the image side surface of the first lens to transition smoothly to the rear lens, which helps to reduce the sensitivity of the first lens.

[0123] In an exemplary embodiment, the first lens may have positive optical power. The first lens may have a convex-convex surface. The first lens has positive optical power, and its first side surface (object side surface) is convex, which converges light rays. The first lens may also be made of a high refractive index material, which is beneficial for reducing the front aperture and achieving miniaturization. The first lens has a biconvex structure, and the convex surface of its second side surface (image side surface) can further converge and suppress light rays, which can reduce the aperture of the second lens and thus help to reduce the front aperture of the system and achieve miniaturization.

[0124] In an exemplary embodiment, the second lens may have positive optical power. The second lens may have a convex-concave surface design. The second lens has positive optical power, and the design of the first side (object side) being convex can further smoothly converge light, which can balance the aberration of light from each field of view converging onto the image plane, and further improve resolution; the second side (image side) of the second lens is concave, which has the function of diverging light, so that the light converged by the first side (object side) of the second lens is released to a certain extent, allowing the light to fill the entrance pupil and improve the system illumination; at the same time, it makes the light path transition smoothly, which is conducive to controlling the aperture of the rear lens and realizing miniaturization.

[0125] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a convex-concave surface design. The second lens has negative optical power, and the first side surface (object side) is convex, which weakens and converges the light rays emitted from the first lens. The second side surface (image side) of the second lens is concave, which diverges the light rays, allowing some of the light rays converged by the object side of the second lens to fill the entrance pupil and improve system illumination. Simultaneously, it ensures a smooth transition in light path, which is beneficial for controlling the aperture of the rear lens and achieving miniaturization.

[0126] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a concave-convex surface. The positive optical power of the third lens helps to converge light, reducing the aperture of the fourth lens and the rear system. The concave design of the first side (object side) allows for better reception of light from the front, providing sufficient space for aberration adjustment of the rear light group. The convex design of the second side (image side) further converges the light emitted from the third lens, facilitating its smooth entry into the rear optical system. This further smooths the light path transition, reducing the front aperture of the lens. Combined with the negative optical power of the second lens, it helps to adjust the optical path difference between different fields of view, achieving high resolution. The convex second side (image side) of the third lens converges light after passing through it, allowing as much light from the peripheral field of view as possible to pass through the aperture stop into the rear system, increasing overall light transmission and illumination.

[0127] In an exemplary embodiment, the third lens may have negative optical power. The third lens may have a concave-convex surface. The third lens has negative optical power, and the design of the first side (object side) being concave can better receive the light from the front, leaving sufficient space for aberration adjustment of the rear group of light. At the same time, the object side concave surface can well receive the incident light passing through the first and second lenses; combined with the second side (image side) being convex, the outgoing light is converged, and it can have a light path similar to that of the fourth lens, making the light transition smooth and reducing sensitivity.

[0128] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. The fourth lens, with its positive optical power and biconvex design, engages with the convex surface of the second side (image side) of the third lens, allowing light to smoothly transition to the rear lens with minimal light deflection and reduced sensitivity. In an exemplary embodiment, the fourth lens is cemented with the fifth lens, which can further reduce field curvature to correct off-axis aberrations of the system.

[0129] In an exemplary embodiment, the fourth lens may have negative optical power. The fourth lens may have a convex-concave surface. The fourth lens has negative optical power and diverges light. The first side (object side) is convex, further converging the light rays emitted after passing through the third lens. The second side (image side) is concave, further releasing the light rays to ensure a smooth transition to the rear lens and reduce sensitivity. Simultaneously, the fourth lens, acting as a negative film in the cemented composite, is cemented with the fifth lens, which acts as a positive film, playing a crucial role in correcting chromatic aberration.

[0130] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-convex surface. The fifth lens has positive optical power, and the second side surface (image side) is convex, which is beneficial for converging light. On the one hand, it allows diverging light to smoothly enter the rear optical system, and on the other hand, it can lower the position of light entering the subsequent optical system, reducing the rear port diameter; and when the diameter of the first side surface (object side) of the fifth lens is the same, the front port diameter of the lens can be reduced, achieving the purpose of lens miniaturization.

[0131] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a concave-convex surface. The fifth lens has negative optical power, with a concave first side (object side) to better receive incident light rays from the fourth lens, and a convex second side (image side) to alter the light path, resulting in smoother light transitions, reduced system sensitivity, and improved resolution. This also helps to reduce the aperture of the rear lens, achieving miniaturization. In an exemplary embodiment, the fifth lens is cemented with the positive and negative elements of the fourth lens, effectively correcting chromatic aberration in the optical system and improving image quality.

[0132] In exemplary embodiments, the fourth and fifth lenses may have opposite optical power properties. For example, in one embodiment, the fourth lens has positive optical power and the fifth lens has negative optical power. In another embodiment, the fourth lens has negative optical power and the fifth lens has positive optical power.

[0133] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. As a negative optical power lens, the sixth lens has a diverging effect on light. By controlling the focal length of the sixth lens, chromatic aberration caused by the front positive lens can be effectively corrected, improving image quality. The first side surface (object side) of the sixth lens is convex, which can further converge the light rays converging in front, smoothing the overall light path. The second side surface (image side) is concave, and when combined with a high refractive index material, it makes the light rays exhibit a diverging trend, allowing peripheral light rays to reach a higher imaging position, which is beneficial for use with large-sized chips and can also lengthen the back focal length.

[0134] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex surface. The sixth lens has positive optical power, and the first side surface (object side surface) is convex, which can gather the front group of light rays and limit the rear port diameter, reduce the large aberration effects caused by edge field rays, reduce system sensitivity, and improve optical performance; the design of the second side surface (image side surface) being convex can also optimize the size of the rear port diameter.

[0135] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-concave surface. The positive optical power of the seventh lens converges light rays, controls the angle at which peripheral light rays enter the eighth lens, and effectively controls the system's CRA (Current Aspect Ratio). The first side surface (object side) is convex, weakening the divergence tendency. Combined with the concave surface of the second side surface (image side), the light rays transition smoothly, gradually diverging, allowing peripheral light rays to reach a higher imaging position, which is beneficial for use with large-chip sizes and can also lengthen the back focal length. In an exemplary embodiment, the positive film of the seventh lens is cemented with the negative film of the sixth lens, which can correct aberrations and achieve high resolution. In an exemplary embodiment, the second side surface of the seventh lens may also be planar.

[0136] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-convex surface. The negative optical power of the seventh lens has a diverging effect on light, moderately diverging the light rays converging at the front end, resulting in a smoother light transition and less aberration. Simultaneously, the cemented seventh lens with negative optical power and the sixth lens with positive optical power can correct aberrations and achieve high resolution. In an exemplary embodiment, the second side surface of the seventh lens may also be planar.

[0137] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-convex surface. The seventh lens has negative optical power, and its first side surface (object side) is concave, allowing it to better receive light rays emitted from the sixth lens; its second side surface (image side) is convex, effectively converging and focusing light rays, achieving a miniaturized rear-port diameter; the bonding of the negative optical power seventh lens with the positive optical power sixth lens can correct aberrations and achieve high resolution. In an exemplary embodiment, the second side surface of the seventh lens may also be planar.

[0138] In exemplary embodiments, the sixth lens and the seventh lens may have opposite optical power properties. For example, in one embodiment, the sixth lens has positive optical power and the seventh lens has negative optical power. In another embodiment, the sixth lens has negative optical power and the seventh lens has positive optical power.

[0139] In an exemplary embodiment, the eighth lens may have negative optical power. The eighth lens may have a concave-convex surface. The negative optical power of the eighth lens can balance the aberrations produced by the preceding positive optical power lenses, achieving high resolution; simultaneously, it diverges the light rays in the central and peripheral field of view, lengthening the back focal length; the biconcave design of the eighth lens causes light rays to diverge upwards after passing through its second side surface (image side), allowing the light rays to accumulate rapidly on the image plane, which is beneficial for expanding the imaging range. In an exemplary embodiment, the second side surface of the eighth lens may also be planar.

[0140] In an exemplary embodiment, the eighth lens may have negative optical power. The eighth lens may have a concave-convex surface. The negative optical power of the eighth lens can balance the aberrations produced by the preceding positive optical power lenses, achieving high resolution; simultaneously, the negative optical power facilitates light diffusion, expanding the imaging range; the first side surface (object side) of the eighth lens is concave, which can collect more light entering through the seventh lens, while the second side surface (image side) is convex, enabling the light to converge smoothly to the rear optical system, reducing light energy loss and improving system illumination. In an exemplary embodiment, the second side surface of the eighth lens may also be planar.

[0141] In an exemplary embodiment, the fourth lens and the fifth lens can be cemented together to form a cemented doublet lens. The fourth lens and the fifth lens have opposite optical powers, and the two are cemented together to allow light to smoothly transition to the rear lens.

[0142] In an exemplary embodiment, the sixth and seventh lenses can be cemented together to form a cemented doublet lens. The sixth and seventh lenses, forming a cemented joint, can smoothly transition light rays from the front lens to the rear optical system, reducing the overall length of the lens. This allows for 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.

[0143] The aforementioned cemented doublet lens also has the following advantages: it can reduce the air gap between the two lenses, thereby reducing the overall system length; the chromatic aberration of the two lenses is complementary, which helps to reduce chromatic aberration and improve image quality; it can reduce the number of assembly components between the two lenses, reduce processes, and lower costs; furthermore, it can reduce field curvature and correct off-axis point aberrations of the system; and, with reasonable focal length allocation, it helps to achieve thermal compensation and obtain good temperature performance.

[0144] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the second lens and the third lens. Positioning the aperture stop between the second and third 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. However, it should be noted that the aperture stop positions disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be positioned at other locations as needed.

[0145] In an exemplary embodiment, the optical lens according to the present application can satisfy: TTL / F≤3.5, where TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. Controlling the ratio of the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis to the total effective focal length of the optical lens within this range is beneficial to realizing the miniaturization of the lens. For an optical system with the same focal length, the smaller the TTL is, the more favorable the miniaturization is. More specifically, TTL and F can further satisfy: TTL / F≤3, and controlling the ratio of TTL to F within this range can further realize miniaturization. TTL and F can also further satisfy: TTL / F≤2.5.

[0146] In an exemplary embodiment, the optical lens according to the present application can satisfy: F / ENPD≤2, where F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. Controlling the ratio of the total effective focal length of the optical lens to the entrance pupil diameter of the optical lens within this range is beneficial to achieving a small F number, increasing the amount of transmitted light, and a large entrance pupil aperture helps improve relative illumination. More specifically, F and ENPD can further satisfy: 1.4≤F / ENPD≤1.8, and controlling the ratio of F to ENPD within this range can further increase the amount of transmitted light and improve relative illumination.

[0147] In an exemplary embodiment, the optical lens according to the present application can satisfy: -8≤R32 / F<0, where R32 is the radius of curvature of the second side surface of the third lens, and F is the total effective focal length of the optical lens. Controlling the ratio of the radius of curvature of the second side surface of the third lens to the total effective focal length of the optical lens within this range is beneficial to appropriately converging light and reducing the aperture.

[0148] More specifically, R32 and F can further satisfy: -4≤R32 / F≤-0.2. Controlling the ratio of R32 to F within this range is beneficial for the light in the peripheral field of view to smoothly and stably enter the fourth lens, improving illumination and resolution. R32 and F can also further satisfy: -2≤R32 / F≤-0.4.

[0149] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0<R41 / F≤5, where R41 is the radius of curvature of the first side surface of the fourth lens, and F is the total effective focal length of the optical lens. Controlling the ratio of the radius of curvature of the first side surface of the fourth lens to the total effective focal length of the optical lens within this range is beneficial to smoothly receiving the light from the front.

[0150] More specifically, R41 and F can further satisfy: 0.3≤R41 / F≤3.5. Controlling the ratio of R41 to F within this range allows light to smoothly transition to the rear lens, results in smaller light deflection, reduces sensitivity, improves imaging quality and achieves high resolution. R41 and F can still more preferably satisfy: 0.5≤R41 / F≤2.5.

[0151] In an exemplary embodiment, the optical lens according to the present application can satisfy: -8≤R52 / F<0, wherein R52 is the curvature radius of the second side surface of the fifth lens, and F is the total effective focal length of the optical lens. Controlling the ratio of the curvature radius of the second side surface of the fifth lens to the total effective focal length of the optical lens within this range is beneficial for moderately converging light and increasing the luminous flux.

[0152] More specifically, R52 and F can further satisfy: -4≤R52 / F≤-0.3. Controlling the ratio of R52 to F within this range is beneficial for converging the light from the front group of the system, limiting the rear aperture, and realizing miniaturization of the rear aperture. R52 and F can still more preferably satisfy: -2.5≤R52 / F≤-0.5.

[0153] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0<R61 / F≤8, wherein R61 is the curvature radius of the first side surface of the sixth lens, and F is the total effective focal length of the optical lens. Controlling the ratio of the curvature radius of the first side surface of the sixth lens to the total effective focal length of the optical lens within this range is beneficial for converging the light from the front group of the system, limiting the rear aperture, and realizing miniaturization of the rear aperture.

[0154] More specifically, R61 and F can further satisfy: 0.3≤R61 / F≤5. Controlling the ratio of R61 to F within this range can further reduce aberrations and improve resolution. R61 and F can still more preferably satisfy: 0.8≤R61 / F≤3.5.

[0155] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0<R21 / F≤7, wherein R21 is the curvature radius of the first side surface of the second lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the first side surface of the second lens to the total effective focal length of the optical lens within this range, the first side surface (object side surface) of the second lens is configured as a convex surface, which has a converging effect, appropriately converges the divergent light exiting from the first lens, and can balance the aberration of light from each field of view converged on the image plane.

[0156] More specifically, R21 and F can further satisfy: 0.25≤R21 / F≤5. Controlling the ratio of R21 to F within this range can further improve resolution. R21 and F can still more preferably satisfy: 0.35≤R21 / F≤3.5.

[0157] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0 < R22 / F ≤ 8, wherein R22 is the curvature radius of the second side surface of the second lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the second side surface of the second lens to the total effective focal length of the optical lens within this range, the second side surface (image side surface) of the second lens is arranged as a concave surface, which has the function of diverging light, so that the light passing through the second lens is released to a certain extent, more marginal light enters the diaphragm, the luminous flux is increased, and the system illumination is improved. More specifically, R22 and F can further satisfy: 0.25 ≤ R22 / F ≤ 6. Controlling the ratio of R22 to F within this range can further increase the luminous flux and improve the system illumination.

[0158] In an exemplary embodiment, the optical lens according to the present application can satisfy: -4 ≤ F8 / F < 0, wherein F8 is the effective focal length of the eighth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the eighth lens to the total effective focal length of the optical lens within this range, the eighth lens has negative power, and the light passing through the eighth lens tends to diverge, so that more light enters the image plane, which effectively increases the luminous flux while taking into account the long focal length of the whole system. More specifically, F8 and F can further satisfy: -2.5 ≤ F8 / F ≤ -0.2. Controlling the ratio of F8 to F within this range can further increase the luminous flux and better take into account the long focal length of the whole system. F8 and F can still further satisfy: -1.8 ≤ F8 / F ≤ -0.5.

[0159] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.5 ≤ F1 / F, wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within this range, the focal length of the first lens is reasonably distributed, which is conducive to the entry of large field-of-view light into the optical system. In an exemplary embodiment, F1 / F can also be equal to values such as 240, 230, 200, 170, 130, 100, 70, 40, 15, 8 or 4, for example. More specifically, F1 and F can further satisfy: 1.2 ≤ F1 / F. Controlling the ratio of F1 to F within this range can further facilitate the entry of large field-of-view light into the optical system. F1 and F can still further satisfy: 1.65 ≤ F1 / F ≤ 240.

[0160] In an exemplary embodiment, the optical lens according to this application satisfies: 0.7 ≤ R62 / R71 ≤ 1.3, where R62 is the radius of curvature of the second side of the sixth lens and R71 is the radius of curvature of the first side of the seventh lens. By controlling the radius of curvature of the second side of the sixth lens to be close to that of the first side of the seventh lens, the sixth and seventh lenses can be cemented together. They have opposite optical powers, and the cementation of lenses with positive and negative optical powers is beneficial for chromatic aberration correction and improved resolution. Furthermore, using cemented components can reduce the tolerance sensitivity such as tilt / eccentricity generated during the assembly of individual lenses, further improving system performance; cemented components also facilitate smooth light transition and reduce system sensitivity. More specifically, R62 and R71 can further satisfy: 0.8 ≤ R62 / R71 ≤ 1.2. Controlling the ratio of R62 to R71 within this range can further correct chromatic aberration, improve resolution, and further enhance system performance while reducing system sensitivity. R62 and R71 can further satisfy: 0.9 ≤ R62 / R71 ≤ 1.1. And can further satisfy: 0.95 ≤ R62 / R71 ≤ 1.05.

[0161] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: d67 / TTL ≤ 0.05, where d67 is the air gap between the sixth and seventh lenses 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. By controlling the ratio of the air gap between the sixth and seventh lenses on the optical axis to 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 within this range, the air gap between the centers of the sixth and seventh lenses is very small, allowing them to be cemented together. Cementing lenses with both positive and negative optical powers is beneficial for correcting chromatic aberration and improving resolution. Furthermore, using cemented components can reduce the tolerance sensitivity such as tilt / eccentricity generated during the assembly of individual lenses, further improving system performance. More specifically, d67 and TTL can further satisfy: d67 / TTL ≤ 0.02. Controlling the ratio of d67 to TTL within this range can further correct chromatic aberration, improve resolution, and further enhance system performance. Furthermore, d67 and TTL can be further satisfied with: d67 / TTL≤0.01. And even further satisfied with: d67 / TTL≤0.005.

[0162] In an exemplary embodiment, the optical lens according to this application satisfies: F67 / F ≤ 10, where F67 is the combined focal length of the sixth and seventh lenses, and F is the total effective focal length F of the optical lens. By controlling the ratio of the combined focal length of the sixth and seventh lenses to the total effective focal length of the optical lens within this range, the light path entering the cemented component can be effectively controlled, reducing aberrations caused by large-angle incident light at the front end, allowing light to enter the image plane smoothly, and simultaneously making the lens structure compact, which is beneficial for miniaturization. In an exemplary embodiment, F67 / F can be equal to values ​​such as 20, 15, 10, 5, 3, and 1.0. More specifically, F67 and F can further satisfy: 0.5 ≤ F67 / F ≤ 6. Controlling the ratio of F67 and F within this range can further reduce aberrations, which is more beneficial for miniaturization. F67 and F can also further satisfy: 1.0 ≤ F67 / F ≤ 4.5.

[0163] In an exemplary embodiment, the optical lens according to this application satisfies: 0.7 ≤ R42 / R51 ≤ 1.3, where R42 is the radius of curvature of the second side surface of the fourth lens, and R51 is the radius of curvature of the first side surface of the fifth lens. By controlling the radius of curvature of the second side surface of the fourth lens to be close to that of the first side surface of the fifth lens, the fourth and fifth lenses can be cemented together. They have opposite optical powers, and the cementation of lenses with positive and negative optical powers is beneficial for chromatic aberration correction and improved resolution. Furthermore, the cemented component reduces one surface compared to two independent lenses, significantly reducing the probability of ghosting between the fourth and fifth lenses; simultaneously, the cemented component also facilitates smooth light transition and reduces system sensitivity. More specifically, R42 and R51 can further satisfy: 0.8 ≤ R42 / R51 ≤ 1.2. Controlling the ratio of R42 to R51 within this range can further correct chromatic aberration, improve resolution, further reduce ghosting, and lower system sensitivity. R42 and R51 can further satisfy: 0.9 ≤ R42 / R51 ≤ 1.1. And can further satisfy: 0.95 ≤ R42 / R51 ≤ 1.05.

[0164] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: d45 / TTL ≤ 0.05, where d45 is the air gap between the fourth and fifth lenses 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. By controlling the ratio of the air gap between the fourth and fifth lenses on the optical axis to 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 within this range, the air gap between the centers of the fourth and fifth lenses is very small, allowing them to be cemented together. Cementing lenses with both positive and negative optical powers is beneficial for correcting chromatic aberration and improving resolution. Furthermore, the cemented component reduces one surface compared to two independent lenses, significantly reducing the probability of ghosting between the fourth and fifth lenses. More specifically, d45 and TTL can further satisfy: d45 / TTL ≤ 0.02. Controlling the ratio of d45 to TTL within this range can further correct chromatic aberration, improve resolution, and further reduce ghosting. Furthermore, d45 and TTL can be further satisfied with: d45 / TTL≤0.01. And even further satisfied with: d45 / TTL≤0.005.

[0165] In an exemplary embodiment, the optical lens according to this application satisfies: F45 / F≤5, where F45 is the combined focal length of the fourth and fifth lenses, and F is the total effective focal length of the optical lens. The fourth and fifth lenses are cemented together, and controlling the ratio of the combined focal length of the fourth and fifth lenses to the total effective focal length of the optical lens within this range facilitates beam expansion, thereby controlling the light path between the third and sixth lenses, ensuring that the edge light paths are uniform and preventing significant refraction. This reduces aberrations caused by large-angle light entering through the first lens and also helps correct system chromatic aberration, improving resolving power. More specifically, F45 and F can further satisfy: 0.15≤F45 / F≤3.5. Controlling the ratio of F45 to F within this range allows for better control of light path, reducing aberrations, and further correcting system chromatic aberration, improving resolving power. F45 and F can also further satisfy: 0.4≤F45 / F≤2.

[0166] In an exemplary embodiment, the optical lens according to this application satisfies the condition 45°≤(FOV×F) / H, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the maximum field of view of the optical lens, the total effective focal length of the optical lens, and the image height corresponding to the maximum field of view of the optical lens to satisfy the condition 45°≤(FOV×F) / H, the lens can simultaneously satisfy the requirements of telephoto and large angular resolution.

[0167] More specifically, FOV, F, and H can further satisfy: 50°≤(FOV×F) / H≤80°. Controlling FOV, F, and H to satisfy 50°≤(FOV×F) / H≤80° can better enable the lens to simultaneously meet the requirements of telephoto and wide-angle resolution. FOV, F, and H can also be further satisfied: 52°≤(FOV×F) / H≤60°.

[0168] In an exemplary embodiment, the optical lens according to this application satisfies: 1.0 ≤ F / H ≤ 2.5, where F is the total effective focal length of the optical lens and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the ratio of the total effective focal length of the optical lens to the image height corresponding to the maximum field of view of the optical lens within this range, the proportion of focal length and image height can be reasonably designed, which is beneficial to improving resolution. More specifically, F and H can further satisfy: 1.2 ≤ F / H ≤ 2.2. Controlling the ratio of F and H within this range can further benefit the improvement of resolution. F and H can also further satisfy: 1.4 ≤ F / H ≤ 2.0. And can further satisfy: 1.5 ≤ F / H ≤ 1.8.

[0169] In an exemplary embodiment, the optical lens according to this application satisfies the condition |(R11 / D1) / (R12 / D2)|≤1.5, where R11 is the radius of curvature of the first side of the first lens, D1 is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, R12 is the radius of curvature of the second side of the first lens, and D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens. By controlling the radius of curvature of the first side of the first lens, the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature of the second side of the first lens, and the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens to satisfy the condition |(R11 / D1) / (R12 / D2)|≤1.5, the height of the edge light entering the lens can be effectively limited, which is beneficial to suppressing light and achieving a small aperture at the front end. More specifically, R11, D1, R12, and D2 can further satisfy: 0.2≤|(R11 / D1) / (R12 / D2)|≤1.2. Controlling R11, D1, R12, and D2 to satisfy: 0.2≤|(R11 / D1) / (R12 / D2)|≤1.2 can better achieve small-diameter front end.

[0170] In an exemplary embodiment, the optical lens according to this application satisfies: D1 / H / FOV ≤ 0.1, where FOV is the maximum field of view of the optical lens, D1 is the maximum effective 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. By controlling the maximum field of view of the optical lens, the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens to satisfy the condition D1 / H / FOV ≤ 0.1, the maximum aperture of the lens is smaller while the image height and maximum field of view of the maximum field of view of the lens optical system remain unchanged, thus achieving miniaturization. More specifically, D1, H, and FOV can further satisfy: D1 / H / FOV ≤ 0.08. Controlling D1, H, and FOV to satisfy D1 / H / FOV ≤ 0.08 is more conducive to miniaturization. D1, H, and FOV can also further satisfy: D / H / FOV ≤ 0.06.

[0171] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / H / FOV ≤ 0.2, 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 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. By controlling the maximum field of view of the optical lens, the image height corresponding to the maximum field of view of the optical lens, and 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 to satisfy the condition TTL / H / FOV ≤ 0.2, the total length of the optical system is reduced while the image height corresponding to the maximum field of view of the lens optical system remains unchanged, which is beneficial for miniaturization. More specifically, TTL, H, and FOV can further satisfy: TTL / H / FOV ≤ 0.15. Controlling TTL, H, and FOV to satisfy TTL / H / FOV ≤ 0.15 can further reduce the total length of the optical system and better achieve miniaturization. TTL, H, and FOV can also further satisfy: TTL / H / FOV ≤ 0.125.

[0172] In an exemplary embodiment, the optical lens according to the present application can satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5, where H is the image height corresponding to the maximum field of view 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. By controlling the image height corresponding to the maximum field of view of the optical lens, the total effective focal length of the optical lens and the radian value corresponding to the maximum field of view of the optical lens to satisfy the conditional expression 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5, when the ideal image height remains unchanged, the closer the actual image height is to the ideal image height, the smaller the distortion of the lens is. More specifically, H, F and θ can further satisfy: 0.8≤(H / 2) / (F×tan(θ / 2))≤1.2. Controlling H, F and θ to satisfy 0.8≤(H / 2) / (F×tan(θ / 2))≤1.2 can better achieve small distortion. H, F and θ can still further satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1.

[0173] In an exemplary embodiment, the optical lens according to the present application can satisfy: -12<R22 / R31<0, where R22 is the curvature radius of the second side surface of the second lens, and R31 is the curvature radius of the first side surface of the third lens. By controlling the ratio of the curvature radius of the second side surface of the second lens to the curvature radius of the first side surface of the third lens within this range, it is favorable for the light emitted from the second lens to be better received by the third lens and transmitted to the rear system, thereby increasing the light flux.

[0174] More specifically, R22 and R31 can further satisfy: -9≤R22 / R31≤-0.3. Controlling the ratio of R22 to R31 within this range can improve the resolution and achieve a long focal length at the same time. R22 and R31 can still further satisfy: -7.5≤R22 / R31≤-0.5.

[0175] In an exemplary embodiment, the optical lens according to this application satisfies the following: 0.1 ≤ d23 / TTL ≤ 0.5, where d23 is the air gap between the second and third lenses on the optical axis, i.e., the distance on the optical axis from the center of the second side of the second lens to the center of the first side of the third lens; 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. By controlling the ratio of the air gap between the second and third lenses on the optical axis to 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 within this range, a larger gap is controlled between the second and third lenses, resulting in a higher light height for the light rays emitted from the second lens reaching the aperture stop. This is beneficial for increasing the entrance pupil diameter, allowing the light rays to continue diverging into the surface of the third lens after passing through the aperture stop, increasing the light transmission and improving relative illumination. More specifically, d23 and TTL can further satisfy: 0.14 ≤ d23 / TTL ≤ 0.3. Controlling the ratio of d23 to TTL within this range can further increase the light transmission and improve relative illumination.

[0176] In an exemplary embodiment, the optical lens according to this application satisfies: -2.0 ≤ R32 / R41 ≤ -0.1, where R32 is the radius of curvature of the second side surface of the third lens, and R41 is the radius of curvature of the first side surface of the fourth lens. By controlling the ratio of the radius of curvature of the second side surface of the third lens to the radius of curvature of the first side surface of the fourth lens within this range, it is beneficial to ensure a smooth transition of light to the rear lens, resulting in less light deflection, reduced sensitivity, improved image quality, and high resolution. More specifically, R32 and R41 can further satisfy: -1.5 ≤ R32 / R41 ≤ -0.2. Controlling the ratio of R32 and R41 within this range allows for a smoother transition of light to the rear lens, reducing light deflection, further reducing sensitivity, improving image quality, and achieving high resolution. R32 and R41 can also further satisfy: -1.2 ≤ R32 / R41 ≤ -0.3.

[0177] 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, and the protective glass can prevent damage to the second-side components (e.g., chips) of the optical lens.

[0178] In an exemplary embodiment, the first to eighth lenses may include aspherical lenses. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when resolving quality is a primary concern. 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 and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the lens's imaging quality. The inclusion of aspherical lenses helps correct system aberrations and improves resolving power.

[0179] 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.

[0180] The optical lens according to the above embodiments of this application, through the reasonable setting of parameters such as the shape and optical power of each lens, can have at least one of the beneficial effects such as high resolution, miniaturization, small aperture, low sensitivity, high light transmission, long focal length, low distortion and high performance, so that the optical lens can better adapt to the ever-evolving requirements of automotive front-view lens applications.

[0181] 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.

[0182] Example 1

[0183] The following is for reference Figure 1 The 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.

[0184] 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.

[0185] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0186] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0187] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0188] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0189] Table 1 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Embodiment 1. Regarding "thickness / distance," it should be understood that the thickness / distance in the row containing S1 is the center thickness of the first lens L1, the thickness / distance in the row containing S2 is the air gap distance between the first lens L1 and the second lens L2, the thickness / distance in the row containing S3 is the center thickness of the second lens L2, and so on.

[0190]

[0191] Table 1

[0192] Example 2

[0193] The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0194] 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.

[0195] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0196] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0197] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0198] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0199] Table 2 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 2.

[0200]

[0201] Table 2

[0202] Example 3

[0203] The following is for reference Figure 3 The 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.

[0204] 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.

[0205] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0206] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0207] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0208] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0209] Table 3 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 3.

[0210]

[0211]

[0212] Table 3

[0213] Example 4

[0214] The following is for reference Figure 4The 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.

[0215] 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.

[0216] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0217] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0218] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0219] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0220] Table 4 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 4.

[0221]

[0222]

[0223] Table 4

[0224] Example 5

[0225] The following is for reference Figure 5 The 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.

[0226] 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.

[0227] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0228] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0229] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0230] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0231] Table 5 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 5.

[0232]

[0233] Table 5

[0234] Example 6

[0235] The following is for reference Figure 6 The 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.

[0236] 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.

[0237] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0238] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0239] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0240] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0241] Table 6 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 6.

[0242]

[0243]

[0244] Table 6

[0245] Example 7

[0246] The following is for reference Figure 7 The 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.

[0247] 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.

[0248] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0249] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0250] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0251] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0252] Table 7 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 7.

[0253]

[0254]

[0255] Table 7

[0256] Example 8

[0257] The following is for reference Figure 8The 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.

[0258] 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.

[0259] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0260] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0261] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0262] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0263] Table 8 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 8.

[0264]

[0265] Table 8

[0266] Example 9

[0267] The following is for reference Figure 9 The 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.

[0268] 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.

[0269] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, 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 S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0270] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0271] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0272] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0273] Table 9 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 9.

[0274]

[0275] Table 9

[0276] Example 10

[0277] The following is for reference Figure 10 The 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.

[0278] 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.

[0279] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, 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 S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0280] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0281] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0282] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0283] Table 10 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 10.

[0284]

[0285]

[0286] Table 10

[0287] Example 11

[0288] The following is for reference Figure 11 The 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.

[0289] 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.

[0290] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0291] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0292] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0293] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0294] Table 11 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 11.

[0295]

[0296]

[0297] Table 11

[0298] Example 12

[0299] The following is for reference Figure 12The 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.

[0300] 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.

[0301] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 is a concave-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0302] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0303] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0304] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0305] Table 12 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 12.

[0306]

[0307] Table 12

[0308] Example 13

[0309] The following is for reference Figure 13 The 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.

[0310] 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.

[0311] The first lens L1 is a convex-convex lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is convex. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0312] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0313] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0314] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0315] Table 13 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 13.

[0316]

[0317]

[0318] Table 13

[0319] Example 14

[0320] The following is for reference Figure 14 The 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.

[0321] 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.

[0322] The first lens L1 is a convex-convex lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is convex. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a concave-convex lens with negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet; the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet.

[0323] The optical lens also includes an aperture stop STO positioned between the second lens L2 and the third lens L3, which helps to effectively converge the light entering the optical system, reduce the lens aperture at the rear of the optical system, and decrease the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the second lens L2 and the third lens L3, near the first side surface S6 of the third lens L3.

[0324] In this embodiment, the optical lens may further include a filter or protective glass disposed between the eighth lens L8 and the imaging plane (IMA), the filter or protective glass having, for example, a first side surface S16 and a second side surface S17.

[0325] When the optical lens is used for imaging, light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through each surface S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0326] Table 14 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 14.

[0327]

[0328]

[0329] Table 14

[0330] In summary, the parameter values ​​in Examples 1 to 14 are shown in Tables 15-1 and 15-2 below, respectively. The units of F, TTL, ENPD, H, F1-F8, d45, d67, R11, R12, R21, R22, R31, R32, R41, R42, R51, R52, R61, R62, R71, R72, R81, R82, D1, D2, F45, F67 and d23 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0331]

[0332]

[0333] Table 15-1

[0334]

[0335]

[0336] Table 15-2 and Examples 1 to 14 respectively satisfy the relationships shown in Table 16-1 and Table 16-2 below.

[0337]

[0338]

[0339] Table 16-1

[0340]

[0341]

[0342] Table 16-2

[0343] 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.

[0344] 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 positive optical power has a convex first side surface; A second lens with optical power has a first convex surface and a second concave surface; A third lens with optical power has a concave first side and a convex second side. The fourth lens, which has optical power, has a convex first side surface; The fifth lens, which has optical power, has a convex second side surface; The sixth lens, which has optical power, has a convex first side surface; A seventh lens with optical power; and The eighth lens, which has negative optical power, has a concave first side surface; The optical power arrangement of the second lens to the seventh lens is any one of the following: negative negative positive negative positive negative, negative negative negative positive positive negative, negative negative positive negative negative positive, negative negative negative positive negative positive, negative negative negative positive positive, negative positive positive negative positive, positive negative positive negative positive, positive negative positive negative positive; The fourth lens and the fifth lens are cemented together to form a cemented doublet lens; The sixth lens and the seventh lens are cemented together to form a cemented doublet lens; The optical lens has eight lenses with optical power. The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1.2≤F1 / F≤240.

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

3. The optical lens according to claim 1, characterized in that, The fourth lens has positive optical power, and its second side surface is convex; or The fourth lens has negative optical power, and its second side surface is concave.

4. The optical lens according to claim 1, characterized in that, The fifth lens has positive optical power, and its first side surface is convex; or The fifth lens has negative optical power, and its first side surface is concave.

5. The optical lens according to claim 1, characterized in that, The sixth lens has negative optical power, and its second side surface is concave; or The sixth lens has positive optical power, and its second side surface is convex.

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

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

8. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop disposed between the second lens and the third lens.

9. The optical lens according to any one of claims 1 to 8, 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 satisfies the following condition: TTL / F≤3.

5.

10. The optical lens according to any one of claims 1 to 8, 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: F / ENPD≤2.

11. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R32 of the second side surface of the third lens and the total effective focal length F of the optical lens satisfy: -4≤R32 / F<0.

12. The optical lens according to claim 11, characterized in that, It satisfies: -2≤R32 / F≤-0.

2.

13. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R41 of the first side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: 0 <R41 / F≤3.5。 14. The optical lens according to claim 13, characterized in that, It satisfies: 0.3≤R41 / F≤2.

5.

15. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R52 of the second side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -4≤R52 / F<0.

16. The optical lens according to claim 15, characterized in that, It satisfies: -2.5≤R52 / F≤-0.

3.

17. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R61 of the first side surface of the sixth lens and the total effective focal length F of the optical lens satisfy: 0 <R61 / F≤5。 18. The optical lens according to claim 17, characterized in that, It satisfies: 0.3≤R61 / F≤3.

5.

19. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R21 of the first side surface of the second lens and the total effective focal length F of the optical lens satisfy: 0 <R21 / F≤5。 20. The optical lens according to claim 19, characterized in that, It satisfies: 0.25≤R21 / F≤3.

5.

21. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R22 of the second side surface of the second lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0 <R22 / F≤8。 22. The optical lens according to any one of claims 1 to 8, characterized in that, The effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy the condition: -2.5≤F8 / F<-0.

2.

23. The optical lens according to any one of claims 1 to 8, characterized in that, The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1.65≤F1 / F≤240.

24. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R62 of the second side surface of the sixth lens and the radius of curvature R71 of the first side surface of the seventh lens satisfy the following condition: 0.8 ≤ R62 / R71 ≤ 1.

2.

25. The optical lens according to any one of claims 1 to 8, characterized in that, The air gap d67 between the sixth lens and 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: d67 / TTL≤0.

02.

26. The optical lens according to any one of claims 1 to 8, characterized in that, The combined focal length F67 of the sixth lens and the seventh lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0.5≤F67 / F≤6.

27. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R42 of the second side surface of the fourth lens and the radius of curvature R51 of the first side surface of the fifth lens satisfy the following condition: 0.8 ≤ R42 / R51 ≤ 1.

2.

28. The optical lens according to any one of claims 1 to 8, characterized in that, The air gap d45 between the fourth lens and the fifth 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: d45 / TTL≤0.

02.

29. The optical lens according to any one of claims 1 to 8, characterized in that, The combined focal length F45 of the fourth lens and the fifth lens satisfies the following condition with respect to the total effective focal length F of the optical lens: 0.15≤F45 / F≤3.

5.

30. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 45°≤(FOV×F) / H≤80°.

31. The optical lens according to claim 30, characterized in that, It satisfies: 50°≤(FOV×F) / H≤60°.

32. The optical lens according to any one of claims 1 to 8, characterized in that, The total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.2≤F / H≤2.

2.

33. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R11 of the first side of the first lens, the maximum effective aperture D1 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature R12 of the second side of the first lens, and the maximum effective aperture D2 of the second side of the first lens corresponding to the maximum field of view of the optical lens satisfy: |(R11 / D1) / (R12 / D2)|≤1.

5.

34. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum field of view (FOV) of the optical lens, the maximum effective aperture (D1) 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 condition: D1 / H / FOV≤0.

08.

35. The optical lens according to any one of claims 1 to 8, 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: TTL / H / FOV≤0.

15.

36. The optical lens according to any one of claims 1 to 8, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, 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: 0.8≤(H / 2) / (F×tan(θ / 2))≤1.

2.

37. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R22 of the second side surface of the second lens and the radius of curvature R31 of the first side surface of the third lens satisfy: -12 <R22 / R31<0。 38. The optical lens according to claim 37, characterized in that, It satisfies: -9≤R22 / R31≤-0.

3.

39. The optical lens according to any one of claims 1 to 8, characterized in that, The air gap d23 between the second lens and the third 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: 0.1≤d23 / TTL≤0.

5.

40. The optical lens according to any one of claims 1 to 8, characterized in that, The radius of curvature R32 of the second side surface of the third lens and the radius of curvature R41 of the first side surface of the fourth lens satisfy: -1.5≤R32 / R41≤-0.

1.

41. The optical lens according to claim 1, characterized in that, The optical lens satisfies any one of the following conditions: 2.0762≤TTL / F≤3 1.4 ≤ F / ENPD ≤ 1.8 -2≤R³² / F≤-0.4 0.5 ≤ R41 / F ≤ 2.5 -2.5≤R52 / F≤-0.5 0.8 ≤ R61 / F ≤ 3.5 0.35≤R²¹ / F≤3.5 0.25≤R²² / F≤6 -1.8≤F8 / F≤-0.5 2.1334≤F1 / F≤240 0.95≤R62 / R71≤1.05 d67 / TTL≤0.01 1.0≤F67 / F≤4.5 0.4≤F45 / F≤2 0.9≤R42 / R51≤1.1 d45 / TTL≤0.01 52°≤(FOV×F) / H≤60° 1.4 ≤ F / H ≤ 2.0 0.2≤|(R11 / D1) / (R12 / D2)|≤1.2 0.0432≤D1 / H / FOV≤0.06 0.1004≤TTL / H / FOV≤0.125 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1 0.14≤d23 / TTL≤0.3 -7.5≤R22 / R31≤-0.5 -1.2≤R32 / R41≤-0.3 in, TTL is the distance from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis; F is the total effective focal length of the optical lens; ENPD is the entrance pupil diameter of the optical lens; R32 is the radius of curvature of the second side surface of the third lens; R41 is the radius of curvature of the first side surface of the fourth lens; R52 is the radius of curvature of the second side surface of the fifth lens; R61 is the radius of curvature of the first side surface of the sixth lens; R21 is the radius of curvature of the first side surface of the second lens; R22 is the radius of curvature of the second side surface of the second lens; F8 is the effective focal length of the eighth lens; F1 is the effective focal length of the first lens; R62 is the radius of curvature of the second side surface of the sixth lens; R71 is the radius of curvature of the first side surface of the seventh lens; d67 is the air gap between the sixth and seventh lenses on the optical axis; F67 is the combined focal length of the sixth and seventh lenses. F45 is the combined focal length of the fourth and fifth lenses, R42 is the radius of curvature of the second side of the fourth lens, R51 is the radius of curvature of the first side of the fifth lens, d45 is the air gap between the fourth and fifth lenses on the optical axis, 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, R11 is the radius of curvature of the first side of the first lens, D1 is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, R12 is the radius of curvature of the second side of the first lens, D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, d23 is the air gap between the second and third lenses on the optical axis, and R31 is the radius of curvature of the first side of the third lens.

42. The optical lens according to claim 1, characterized in that, The optical lens satisfies any one of the following conditions: 2.0762≤TTL / F≤2.3557 1.4≤F / ENPD≤1.6000 -0.9860≤R32 / F≤-0.4536 0.7717≤R41 / F≤1.3385 -1.4523≤R52 / F≤-0.7556 0.9869≤R61 / F≤1.6024 0.4705≤R²¹ / F≤2.8068 0.3488≤R²² / F≤4.6940 -1.0627≤F8 / F≤-0.7685 2.1334≤F1 / F≤156.1270 0.95≤R62 / R71≤1.0000 d67 / TTL≤0.005 1.2693≤F67 / F≤3.4983 0.7426≤F45 / F≤0.9158 0.95≤R42 / R51≤1.05 d45 / TTL≤0.005 54.6627≤(FOV×F) / H≤57.2822 1.5881≤F / H≤1.6642 0.2729≤|(R11 / D1) / (R12 / D2)|≤0.9460 0.0432≤D / H / FOV≤0.0516 0.1004≤TTL / H / FOV≤0.1120 0.9700≤(H / 2) / (F×tan(θ / 2))≤1.0165 0.1492≤d23 / TTL≤0.2749 -6.5099≤R22 / R31≤-0.6556 -1.098≤R32 / R41≤-0.3394 in, TTL is the distance from the center of the first side surface of the first lens to the imaging plane of the optical lens on the optical axis; F is the total effective focal length of the optical lens; ENPD is the entrance pupil diameter of the optical lens; R32 is the radius of curvature of the second side surface of the third lens; R41 is the radius of curvature of the first side surface of the fourth lens; R52 is the radius of curvature of the second side surface of the fifth lens; R61 is the radius of curvature of the first side surface of the sixth lens; R21 is the radius of curvature of the first side surface of the second lens; R22 is the radius of curvature of the second side surface of the second lens; F8 is the effective focal length of the eighth lens; F1 is the effective focal length of the first lens; R62 is the radius of curvature of the second side surface of the sixth lens; R71 is the radius of curvature of the first side surface of the seventh lens; d67 is the air gap between the sixth and seventh lenses on the optical axis; F67 is the combined focal length of the sixth and seventh lenses. F45 is the combined focal length of the fourth and fifth lenses, R42 is the radius of curvature of the second side of the fourth lens, R51 is the radius of curvature of the first side of the fifth lens, d45 is the air gap between the fourth and fifth lenses on the optical axis, 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, R11 is the radius of curvature of the first side of the first lens, D1 is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, R12 is the radius of curvature of the second side of the first lens, D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, d23 is the air gap between the second and third lenses on the optical axis, and R31 is the radius of curvature of the first side of the third lens.

43. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-42 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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