Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device comprising the same. The optical lens comprises, in order from a first side to a second side along an optical axis, a first lens having positive refractive power; a second lens having refractive power; a third lens having refractive power, and the third lens and the second lens have opposite positive and negative refractive power properties; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; and an eighth lens having negative refractive power.

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 advanced driver assistance systems (ADAS), 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-facing cameras, surround-view cameras, driver assistance systems, and autonomous driving, automotive lenses are increasingly used in driver assistance systems, thus requiring them to keep pace with chip development and achieve megapixel resolution, placing higher demands on their high-resolution capabilities. Simultaneously, to meet safe driving requirements, 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; furthermore, ghosting can cause ADAS to misjudge real road conditions, thus requiring lenses with low ghosting.

[0003] However, current optical lenses on the market still suffer from several problems, making it difficult to meet 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 require low light throughput, making them unsuitable for dark environments such as nighttime or rainy days. Finally, regarding ghosting: current technologies cannot yet meet the ghosting-free requirements of autonomous driving, potentially leading to misjudgments of road conditions by the driver assistance system due to ghosting.

[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 that, along its optical axis from a first side to a second side, may sequentially include: a first lens having positive optical power; a second lens having optical power; a third lens having optical power, wherein the third lens and the second lens have opposite optical power properties; a fourth lens having optical power, wherein its first side surface is concave and its second side surface is convex; 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.

[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 positive optical power, with a first convex side and a second concave side.

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

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

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

[0011] In one embodiment, the fourth lens has positive or negative optical power.

[0012] In one embodiment, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

[0013] In one embodiment, the fifth lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0014] In one embodiment, the sixth lens has positive optical power, with its first side surface being convex and its second side surface being either convex or concave.

[0015] In one embodiment, the sixth lens has negative optical power, and the first side of the sixth lens is convex and the second side is concave; or the first side of the sixth lens is concave and the second side is convex.

[0016] In one embodiment, the seventh lens has negative optical power, with its first side surface being concave and its second side surface being convex.

[0017] In one embodiment, the seventh lens has positive optical power, and its first side surface is convex, and its second side surface is either convex or concave.

[0018] In one embodiment, the first side surface of the eighth lens is concave, and the second side surface is either concave or convex.

[0019] In one embodiment, the second lens and the third lens are cemented together to form a cemented doublet lens.

[0020] In one embodiment, the fifth lens and the sixth lens are cemented together to form a cemented doublet lens.

[0021] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0022] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: F1 / F≤15.

[0023] 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: d23 / TTL≤0.1.

[0024] In one embodiment, the optical lens satisfies: d23 / TTL≤0.05.

[0025] In one embodiment, the combined focal length F23 of the second lens and the third lens satisfies the condition that |F23 / F|≤40 with the total effective focal length F of the optical lens.

[0026] 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: 0.7≤R22 / R31≤1.3.

[0027] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: -5≤R41 / TTL<0.

[0028] In one embodiment, the radius of curvature R41 of the first side of the fourth lens and the total effective focal length F of the optical lens satisfy: -8≤R41 / F<0.

[0029] In one embodiment, the optical lens satisfies: -5≤R41 / F≤-0.2.

[0030] In one embodiment, the radius of curvature R42 of the second side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: -9≤R42 / F<0.

[0031] In one embodiment, the optical lens satisfies: -6≤R42 / F≤-0.2.

[0032] In one embodiment, the sagitta SAG41 of the first side of the fourth lens, the maximum effective aperture D41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, the sagitta SAG42 of the second side of the fourth lens, and the maximum effective aperture D42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: 0.1≤(SAG41 / D41) / (SAG42 / D42)≤3.

[0033] In one embodiment, the radius of curvature R51 of the first side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: 0 <R51 / F≤8。

[0034] In one embodiment, the optical lens satisfies: 0.2≤R51 / F≤6.

[0035] In one embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -5≤F8 / F.

[0036] In one embodiment, the radius of curvature R81 of the first side surface of the eighth lens and the total effective focal length F of the optical lens satisfy: -5≤R81 / F<0.

[0037] In one embodiment, the optical lens satisfies: -3≤R81 / F≤-0.25.

[0038] In one embodiment, the air gap d34 between the third lens and the fourth 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: 0.025≤d34 / TTL≤0.5.

[0039] 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: |R32 / R41|≤18.

[0040] In one embodiment, the air gap d78 between the seventh lens and the eighth 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: 0.01≤d78 / TTL≤0.4.

[0041] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the radius of curvature R42 of the second side surface of the fourth lens satisfy: 0.1≤R41 / R42≤10.

[0042] In one embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1≤|F4 / F|.

[0043] In one embodiment, the optical lens satisfies: 1.8 ≤ |F4 / F|.

[0044] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens, the radius of curvature R42 of the second side surface of the fourth lens, and the center thickness d4 of the fourth lens on the optical axis satisfy: 0.1≤R41 / (R42+d4)≤5.

[0045] In one embodiment, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R32 of the second side surface of the third lens satisfy: |R21 / R32|≤10.

[0046] 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 the following condition: 50° ≤ (FOV × F) / H.

[0047] 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 condition that TTL / F ≤ 4.

[0048] 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≤0.3.

[0049] In one embodiment, the maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤5.

[0050] 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.

[0051] 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: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.6.

[0052] In another aspect, this application provides an optical lens that, along its optical axis from a first side to a second side, sequentially includes: a first lens with positive optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power; and an eighth lens with negative optical power; wherein the focal length F4 of the fourth lens satisfies: 1≤|F4 / F|; and 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: 0.7≤R22 / R31≤1.3.

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

[0054] In one embodiment, the second lens has positive optical power, with a first convex side and a second concave side.

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

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

[0057] In one embodiment, the third lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0058] In one embodiment, the fourth lens has positive or negative optical power, with its first side surface being concave and its second side surface being convex.

[0059] In one embodiment, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex.

[0060] In one embodiment, the fifth lens has negative optical power, with its first side surface being convex and its second side surface being concave.

[0061] In one embodiment, the sixth lens has positive optical power, with its first side surface being convex and its second side surface being either convex or concave.

[0062] In one embodiment, the sixth lens has negative optical power, and the first side of the sixth lens is convex and the second side is concave; or the first side of the sixth lens is concave and the second side is convex.

[0063] In one embodiment, the seventh lens has negative optical power, with its first side surface being concave and its second side surface being convex.

[0064] In one embodiment, the seventh lens has positive optical power, and its first side surface is convex, and its second side surface is either convex or concave.

[0065] In one embodiment, the first side surface of the eighth lens is concave, and the second side surface is either concave or convex.

[0066] In one embodiment, the second lens and the third lens are cemented together to form a cemented doublet lens.

[0067] In one embodiment, the fifth lens and the sixth lens are cemented together to form a cemented doublet lens.

[0068] In one embodiment, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0069] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: F1 / F≤15.

[0070] 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: d23 / TTL≤0.1.

[0071] In one embodiment, the optical lens satisfies: d23 / TTL≤0.05.

[0072] In one embodiment, the combined focal length F23 of the second lens and the third lens satisfies the condition that |F23 / F|≤40 with the total effective focal length F of the optical lens.

[0073] In one embodiment, the optical lens satisfies: 0.8≤R22 / R31≤1.2.

[0074] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: -5≤R41 / TTL<0.

[0075] In one embodiment, the radius of curvature R41 of the first side of the fourth lens and the total effective focal length F of the optical lens satisfy: -8≤R41 / F<0.

[0076] In one embodiment, the optical lens satisfies: -5≤R41 / F≤-0.2.

[0077] In one embodiment, the radius of curvature R42 of the second side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: -9≤R42 / F<0.

[0078] In one embodiment, the optical lens satisfies: -6≤R42 / F≤-0.2.

[0079] In one embodiment, the sagitta SAG41 of the first side of the fourth lens, the maximum effective aperture D41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, the sagitta SAG42 of the second side of the fourth lens, and the maximum effective aperture D42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: 0.1≤(SAG41 / D41) / (SAG42 / D42)≤3.

[0080] In one embodiment, the radius of curvature R51 of the first side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: 0 <R51 / F≤8。

[0081] In one embodiment, the optical lens satisfies: 0.2≤R51 / F≤6.

[0082] In one embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -5≤F8 / F.

[0083] In one embodiment, the radius of curvature R81 of the first side surface of the eighth lens and the total effective focal length F of the optical lens satisfy: -5≤R81 / F<0.

[0084] In one embodiment, the optical lens satisfies: -3≤R81 / F≤-0.25.

[0085] In one embodiment, the air gap d34 between the third lens and the fourth 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: 0.025≤d34 / TTL≤0.5.

[0086] 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: |R32 / R41|≤18.

[0087] In one embodiment, the air gap d78 between the seventh lens and the eighth 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: 0.01≤d78 / TTL≤0.4.

[0088] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the radius of curvature R42 of the second side surface of the fourth lens satisfy: 0.1≤R41 / R42≤10.

[0089] In one embodiment, the optical lens satisfies: 1.8 ≤ |F4 / F|.

[0090] In one embodiment, the radius of curvature R41 of the first side surface of the fourth lens, the radius of curvature R42 of the second side surface of the fourth lens, and the center thickness d4 of the fourth lens on the optical axis satisfy: 0.1≤R41 / (R42+d4)≤5.

[0091] In one embodiment, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R32 of the second side surface of the third lens satisfy: |R21 / R32|≤10.

[0092] 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 the following condition: 50° ≤ (FOV × F) / H.

[0093] 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 condition that TTL / F ≤ 4.

[0094] 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≤0.3.

[0095] In one embodiment, the maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤5.

[0096] 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.

[0097] 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: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.6.

[0098] 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.

[0099] 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 application requirements of automotive front-view lenses. Attached Figure Description

[0100] 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:

[0101] Figure 1 To illustrate the structure of the optical lens according to Embodiment 1 of this application;

[0102] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0103] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0104] Figure 4 To illustrate the structure of the optical lens according to Embodiment 4 of this application;

[0105] Figure 5 To illustrate the structure of the optical lens according to Embodiment 5 of this application;

[0106] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0107] Figure 7 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 7 of this application;

[0108] Figure 8 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 8 of this application;

[0109] Figure 9 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 9 of this application;

[0110] Figure 10 To illustrate the structure of the optical lens according to Embodiment 10 of this application;

[0111] Figure 11 To illustrate the structural schematic diagram of the optical lens according to Embodiment 11 of this application;

[0112] Figure 12 To illustrate the structure of the optical lens according to Embodiment 12 of this application;

[0113] Figure 13 To illustrate the structural schematic diagram of the optical lens according to Embodiment 13 of this application;

[0114] Figure 14 To illustrate the structural schematic diagram of the optical lens according to Embodiment 14 of this application; and

[0115] Figures 15 to 28 These are schematic diagrams illustrating the structure of optical lenses according to Embodiments 15 to 28 of this application. Detailed Implementation

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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 refers to the object side, and "second side" as refers 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 refers to the imaging side, and "second side" as refers to the image source side.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] The features, principles and other aspects of this application are described in detail below.

[0125] 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.

[0126] 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).

[0127] 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.

[0128] 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) is designed as a convex surface, which has the function of converging light rays with a large field of view, preventing excessive divergence of object-side light rays, and collecting as much light as possible into the rear optical system; simultaneously, in rainy application scenarios, it facilitates the sliding off of water droplets, reducing the impact of water droplets on image quality. The second side surface (image side) of the first lens is designed as a concave surface, causing the light rays entering through the first side surface (object side) of the first lens to diverge appropriately, further smoothing the transition of light rays exiting through the second side surface (image side) of the first lens to the rear lens, which helps to reduce the sensitivity of the first lens. In an exemplary embodiment, the first lens may use a high refractive index material, which is beneficial for reducing the front aperture and controlling the aperture of the rear lens, achieving a miniaturized design.

[0129] In an exemplary embodiment, the first lens may have positive optical power. The first lens may have a convex-convex shape. The first lens has positive optical power, and its first side surface (object side) is designed as a convex surface, which has the function of converging light rays, preventing excessive divergence of object-side light rays, and collecting as much light as possible into the rear optical system; simultaneously, in rainy application scenarios, it facilitates the sliding off of water droplets, reducing the impact of water droplets on image quality. The second side surface (image side) of the first lens is designed as a convex surface, which can further converge light rays, making the light path transition smoothly to the rear, reducing system sensitivity. At the same time, because the shape of the first lens is gentle, the radii of curvature of the two surfaces are similar, resulting in a small deflection angle when light is incident and emitted, which also helps to reduce the sensitivity of the first lens. In an exemplary embodiment, the first lens may use a high refractive index material, which is beneficial for reducing the front aperture and controlling the aperture of the rear lens, achieving a miniaturized design. The first lens is designed as a biconvex lens, which reduces the height of light entering the second lens, contributing to the miniaturization of the rear end.

[0130] In an exemplary embodiment, the second lens may have positive optical power. The second lens may have a convex-concave surface. Having positive optical power, the second lens has the function of converging light rays. Its first side surface (object side) is designed as a convex surface, which cooperates with the concave surface of the second side surface (image side) of the first lens, enabling the light rays emitted from the first lens to converge. The second side surface (image side) of the second lens is designed as a concave surface, which facilitates further convergence of light rays, smooths the light path, reduces system sensitivity, allows light rays to smoothly enter the rear system, and allows as much large-angle light rays as possible to enter the rear optical system, thus improving the illumination of the edge field of view. Simultaneously, it facilitates control of the aperture of the rear lens, enabling a miniaturized design.

[0131] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a convex-concave surface. Having negative optical power allows the second lens to diverge light, which is beneficial for increasing the aperture and system illumination. Furthermore, by appropriately diverging the light emitted from the first lens, it can balance the aberrations of light rays from different fields of view converging on the image plane, further improving resolution. The first side surface (object side) of the second lens is convex, while the second side surface (image side) is designed to be concave towards the object surface. This allows light to converge within the second lens before diverging into the third lens, reducing the distribution range of light rays from the same field of view on the image side and weakening the coupling relationship between light rays from different fields of view on the image side. This facilitates better correction of light rays from different fields of view and improves the system's resolution. The concave design of the second side surface (image side) allows for the collection of light rays from a large field of view into the rear optical system, while also ensuring a smooth transition in light path. This helps control the aperture of the rear lens and achieves a miniaturized design. In an exemplary embodiment, the second and third lenses are cemented together, reducing the physical distance and facilitating a smaller size while also reducing lens sensitivity.

[0132] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex surface. Having negative optical power allows the second lens to diverge light rays, separating the central and peripheral rays from each field of view. At the same field of view angle, light rays exiting from the second side (image side) of the first lens can provide a larger light-receiving surface for the rear optical system, thus enlarging the physical aperture of the aperture stop and achieving a greater amount of light intake, which is beneficial for increasing image illumination. The first side (object side) of the second lens is designed to be concave, which, in conjunction with the concave surface of the second side (image side) of the first lens, allows the light rays exiting the second lens to smoothly enter the rear, which is beneficial for controlling the aperture of the rear lenses and achieving a miniaturized design. In an exemplary embodiment, the second lens and the third lens are cemented together, which reduces the physical distance, facilitating a smaller size and reducing lens sensitivity.

[0133] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. The third lens has positive optical power, and its first side surface (object side) is designed to be convex, which can compress the height of light rays incident through the second lens. Its second side surface (image side) is also designed to be convex, further converging the light rays exiting the third lens and allowing them to smoothly enter the rear optical system. This further smooths the light path transition, which is beneficial for reducing the front aperture of the lens. Furthermore, when used in conjunction with the negative optical power of the second lens, it helps to adjust the optical path difference between light rays in different fields of view, achieving high resolution. The convexity of the second side surface (image side) of the third lens converges the light rays after passing through it, allowing as much light from the peripheral field of view as possible to pass through the aperture into the rear system, which helps to increase overall light transmission and illumination.

[0134] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-concave surface. The positive optical power of the third lens converges light rays, and when combined with the negative optical power of the second lens, it facilitates the smooth entry of light into the rear optical system. The concave design of the second side (image side) facilitates appropriate light divergence, allowing as many large-angle rays as possible to enter the rear optical system, thus improving the illumination of the peripheral field of view. Simultaneously, it helps control the aperture of the rear lens, enabling a miniaturized design. The positive optical power of the third lens diverges light rays from the central and peripheral fields of view into the rear system. Combined with the negative optical power of the second lens, it helps correct aberrations between peripheral and central rays, achieving high resolution. The concave second side (image side) of the third lens diverges light rays, which helps to raise the position of the light aperture, enlarge the aperture, and achieve a small FNO (no focal length).

[0135] In an exemplary embodiment, the third lens may have a negative optical power. The third lens may have a convex-concave surface. The negative optical power of the third lens helps to diverge light rays, and when combined with the positive optical power of the second lens, it facilitates the smooth entry of light into the rear optical system. Its second side surface (image side) is designed to be concave, which helps to further converge light rays, allowing as many large-angle rays as possible to enter the rear optical system, thus improving the illumination of the peripheral field of view. Simultaneously, it helps to control the aperture of the rear lens, enabling a miniaturized design. The divergence of light rays from the peripheral field of view into the rear system, combined with the positive optical power of the second lens, helps to correct aberrations between peripheral and central rays, achieving high resolution. Furthermore, the concave second side surface (image side) of the third lens, which diverges light rays, helps to increase the position of the light aperture, enlarge the aperture stop, and achieve a small FNO (no focal length).

[0136] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a concave-convex surface. Having positive optical power facilitates light convergence; its first side surface (object side) is designed as concave, allowing light rays exiting through the second side surface (image side) of the third lens to converge, maximizing the collection of light from the peripheral field of view, reducing light energy loss, improving illumination at the edges of the field of view, and altering the trajectory of edge light rays to reduce the lens's front aperture and achieve miniaturization. The second side surface (image side) of the fourth lens is designed as convex, allowing light rays to converge more effectively, reducing defocusing between different fields of view, and improving resolution. Exemplarily, the fourth lens shape is set to approximately a concentric circle, allowing light rays exiting through the third lens to smoothly transition to the rear optical system, which helps reduce the lens's front aperture, decreases lens size, and achieves miniaturization and cost reduction.

[0137] In an exemplary embodiment, the fourth lens may have negative optical power. The fourth lens may have a concave-convex surface. Having negative optical power adjusts the direction of light rays collected by the third lens from different fields of view, further diverging the light rays passing through the third lens, which facilitates a smoother light transition and improves resolution. Exemplarily, the fourth lens is shaped to approximate a concentric circle, allowing the light rays exiting the third lens to smoothly transition to the rear optical system, reducing the front aperture of the lens, decreasing lens size, and achieving miniaturization and cost reduction. The first side surface (object side) of the fourth lens is concave, better receiving and diverging the light rays collected by the front system, allowing peripheral light rays to reach higher imaging positions, which is beneficial for use with large-chip sizes; the second side surface (image side) of the fourth lens is convex, turning and converging the light rays, sharing the light-converging effect of the fifth lens, facilitating a smoother entry of light rays into the fifth lens, reducing the rear aperture while lowering the system sensitivity.

[0138] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-convex surface. Having positive optical power facilitates light convergence; its first side surface (object side) is designed as convex, which, in conjunction with the convex surface of the second side surface (image side) of the fourth lens, results in a smooth light transition, minimal light deflection, reduced system sensitivity, and reduced light energy loss, thus improving illumination at the edge of the field of view. The convex design of the second side surface (image side) of the fifth lens causes light rays from the edge of the field of view to be deflected inwards after passing through the image side surface of the fifth lens, which helps to reduce the rear aperture of the optical system.

[0139] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a convex-concave surface. The negative optical power of the fifth lens diverges the light rays emitted from the fourth lens, balancing the aberrations of light rays from different fields of view converging on the image plane, further improving resolution. The first side surface (object side) of the fifth lens is designed as a convex surface, causing light rays to converge first within the fifth lens, reducing the distribution range of light rays from the same field of view on the image side surface, weakening the coupling relationship between light rays from different fields of view on the image side surface, which is beneficial for better correcting the light rays from each field of view and improving the system's resolution capability.

[0140] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex surface. The positive optical power of the sixth lens is beneficial for light convergence. Combined with the negative optical power of the fifth lens, it further converges the diverging light rays after passing through the fifth lens. Its first side surface (object side surface) is designed as a convex surface, which can further converge the light rays converging in front, smooth the overall light path, reduce light deflection, reduce light energy loss, and help improve the illumination of the edge field of view. The second side surface (image side surface) of the sixth lens is designed as a convex surface, so that the light rays in the edge field of view are deflected inward after passing through the image side surface of the fifth lens, which helps to reduce the rear port diameter of the optical system.

[0141] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex shape. The second side surface (image side) of the sixth lens is convex and is provided with a low refractive material to make the light diverge, weaken the convergence, and allow peripheral light to reach a higher imaging position, which is beneficial for use with large chip sizes, and can also lengthen the back focal length.

[0142] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-concave surface. The positive optical power of the sixth lens is beneficial for light convergence, and when combined with the negative optical power of the fifth lens, it further converges the light rays that have diverged through the fifth lens. Its first side surface (object side surface) is designed as a convex surface, which makes the light rays transition smoothly, with less light deflection, reducing light energy loss and improving the illumination of the edge field of view. Its second side surface (image side surface) is designed as a concave surface, which is beneficial for adjusting the optical path difference between light rays from different fields of view, laying the groundwork for subsequent light rays to converge better to the image plane.

[0143] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. The sixth lens has negative optical power, and its first side surface (object side surface) is convex, which can further converge the light rays converging in front, smoothing out the overall light path.

[0144] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. The concave setting of the second side surface (image side) of the sixth lens, combined with a high refractive material, makes the light diverge and weakens the convergence, allowing peripheral light to reach a higher imaging position, which is beneficial for use with large chip sizes, and can also lengthen the back focal length.

[0145] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a concave-convex surface. The negative optical power of the sixth lens is beneficial for properly diffusing the light rays converged by the fifth lens, which has positive optical power. The first side surface (object side) of the sixth lens is designed as concave, which matches the convex surface of the second side surface (image side) of the fifth lens, resulting in a smooth transition of light rays, less light deflection, reduced light energy loss, and improved illumination at the edge of the field of view. The convex surface of the second side surface (image side) of the sixth lens allows the light rays exiting the sixth lens to converge appropriately, which helps to reduce the aperture of the rear optical system.

[0146] 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 can correct the aberrations caused by the positive focal length of the fifth and sixth lenses in front, achieving high resolution; the first side (object side) of the seventh lens is concave, which, together with a high refractive index material, makes the light diverge and weakens convergence, allowing peripheral light to reach a higher imaging position, which is beneficial for use with large-sized chips, and can also lengthen the back focal length; the second side (image side) of the seventh lens is convex, which can effectively converge and gather light, reducing the back aperture.

[0147] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-convex shape. The positive optical power and gentle lens shape of the seventh lens ensure that light rays exiting the sixth lens are incident almost perpendicularly on the first side (object side) of the seventh lens, resulting in a smooth light transition, minimal aberrations, and improved resolution of the optical system, thus facilitating high resolution. The similar shapes of the two sides of the seventh lens allow for a smooth transition of peripheral field rays, reducing lens sensitivity. The biconvex design of the seventh lens causes peripheral field rays to be deflected inwards after passing through the second side (image side), which helps reduce the rear aperture of the optical system. The positive optical power of the seventh lens, combined with the negative focal length of the sixth lens, corrects aberrations and achieves high resolution.

[0148] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-concave surface. The seventh lens has positive optical power and a gently sloping shape, so that light rays exiting the sixth lens are incident almost perpendicularly on the first side (object side) of the seventh lens. This smooth light transition results in fewer aberrations, improving the resolving power of the optical system and facilitating high resolution. The similar shapes of the two sides of the seventh lens allow for a smooth transition of peripheral field-of-view light rays, reducing lens sensitivity. The concave design of the second side (image side) of the seventh lens helps adjust the optical path difference between different field-of-view rays, altering the light trajectory at the edge of the field of view and making it more concentrated upon reaching the image plane. This helps correct edge field-of-view aberrations and achieve high resolution.

[0149] In an exemplary embodiment, the eighth lens may have a negative optical power. The eighth lens may have a concave-convex shape. The negative optical power of the eighth lens facilitates proper light diffusion, reducing the diverging trend of light rays exiting the seventh lens, further allowing large-angle light rays to transition smoothly as much as possible, reducing light energy loss caused by excessive angles between large field-of-view rays and the chip's principal ray when reaching the image plane, and improving the illumination of the edge field of view. 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 fields of view, lengthening the back focal length, facilitating the assembly of the entire optical system. The first side (object side) and the second side (image side) of the eighth lens are biconcave, which allows light rays to rise, enabling peripheral light rays to reach a higher imaging position, which is beneficial for use with large-sized chips.

[0150] In an exemplary embodiment, the eighth lens may have a negative optical power. The eighth lens may have a concave-convex surface. The negative optical power of the eighth lens facilitates proper light diffusion, reducing the diverging tendency of light rays emitted after the seventh lens and further ensuring a smooth transition for large-angle light rays. The second side surface (image side) of the eighth lens is designed as a convex surface, which allows diverging light rays to converge to the rear optical system, shortening the optical path of peripheral light rays to the image plane and improving illumination. The negative optical power of the eighth lens balances the aberrations produced by the preceding positive optical power lenses, achieving high resolution; simultaneously, it diverges the central and peripheral field of view, lengthening the back focal length and facilitating the assembly of the entire optical system. The concave design of the first side surface (object side) of the eighth lens allows light rays to rise, enabling peripheral light rays to reach a higher imaging position, which is beneficial for use with large-sized chips.

[0151] In an exemplary embodiment, the second lens and the third lens can be cemented together to form a cemented doublet lens. The second lens and the third lens have opposite optical powers, and the two are configured as a cemented component, which allows light to smoothly transition to the rear lens.

[0152] In an exemplary embodiment, the fifth lens and the sixth lens can be cemented together to form a cemented doublet lens. The cemented structure of the fifth and sixth lenses 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.

[0153] In an exemplary embodiment, the sixth and seventh lenses can be cemented together to form a cemented doublet lens. The sixth and seventh lenses constitute a cemented component, reducing the overall length of the lens while maintaining a compact structure. The sixth and seventh lenses have opposite optical powers, and their cementation allows for sufficient correction of various aberrations in the optical system, thereby improving resolution and achieving high image quality.

[0154] 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.

[0155] In an exemplary embodiment, the optical lens may further include an aperture stop disposed between the third lens and the fourth lens. Positioning the aperture stop between the third and fourth lenses facilitates effective light convergence entering the optical system, reduces the lens aperture at the rear 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.

[0156] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: F1 / F ≤ 15, where 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 set so that the light entering from the object side is better compressed, which is beneficial for collecting large-angle light in a limited space. At the same time, it reduces the height of the light incident on the image side of the first lens, reduces the lens aperture, and is beneficial for miniaturization. Meanwhile, the light refracted from the image side of the first lens is smaller, which is beneficial for reducing lens sensitivity. In an exemplary embodiment, F1 / F can be equal to values ​​such as 15, 10, 5, 2, 1, 0.5, and 0.1. More specifically, F1 and F can further satisfy: 0.4 ≤ F1 / F ≤ 10. Controlling the ratio of F1 to F within this range can further facilitate the collection of large-angle light, further reduce the lens aperture, facilitate miniaturization, and further reduce lens sensitivity. F1 and F can also satisfy the condition: 0.8 ≤ F1 / F ≤ 8.

[0157] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: d23 / TTL ≤ 0.1, where d23 is the air gap between the second and third 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 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 plane of the optical lens within this range, the air gap between the second and third lenses is smaller, which is beneficial for a smooth transition of light between the second and third lenses and facilitates miniaturization. The second and third lenses can be cemented together. Cementing a positive lens to a negative lens is beneficial for correcting aberrations and improving resolution. At the same time, the use of cemented parts helps reduce the tolerance sensitivity of the lenses to tilt / eccentricity, etc., during the assembly process, improves resolution stability, and further enhances system performance. It also reduces reflections between lenses and reduces the risk of ghosting. In an exemplary embodiment, d23 / TTL can be equal to values ​​such as 0.1, 0.05, 0.02, and 0.01.

[0158] More specifically, the ratio of d23 to TTL can further satisfy: d23 / TTL ≤ 0.05. Controlling the ratio of d23 to TTL within this range allows for a smoother transition of light between the second and third lenses, further facilitating miniaturization; it also further improves resolution and system performance. The ratio of d23 to TTL can also be further satisfied: d23 / TTL ≤ 0.01.

[0159] In an exemplary embodiment, the optical lens according to this application satisfies: |F23 / F|≤40, where F23 is the combined focal length of the second and third lenses, and F is the total effective focal length of the optical lens. By controlling the absolute value of the ratio of the combined focal length of the second and third lenses to the total effective focal length of the optical lens within this range, it is beneficial to control the light path, smoothly transition the light emitted through the first lens, reduce aberrations, and improve resolution. In an exemplary embodiment, |F23 / F| can be, for example, equal to values ​​such as 40, 30, 20, 15, 8, 4, and 2. More specifically, F23 and F can further satisfy: |F23 / F|≤30. Controlling the absolute value of the ratio of F23 and F within this range allows for better control of the light path, smoother light transition, and further reduction of aberrations and improvement of resolution. F23 and F can also further satisfy: |F23 / F|≤20.

[0160] In an exemplary embodiment, the optical lens according to this application satisfies: 0.7 ≤ R22 / R31 ≤ 1.3, where R22 is the radius of curvature of the second side surface of the second lens, and R31 is the radius of curvature of the first side surface of the third lens. By controlling the ratio of the radius of curvature of the second side surface of the second lens to the radius of curvature of the first side surface of the third lens within this range, light can enter the third lens more smoothly, reducing the sensitivity of the entire system. When the ratio is close to 1, and the condition d23 / TTL ≤ 0.1 is satisfied simultaneously, the two lenses can be cemented together. Cementing the positive and negative lenses together is beneficial for correcting aberrations and improving resolution; at the same time, the use of cemented parts is beneficial for reducing the tolerance sensitivity of the lenses to tilt / eccentricity, etc., during the assembly process, improving resolution stability, and further improving system performance. In an exemplary embodiment, R22 / R31 can be equal to values ​​such as 1.3, 1.2, 1.1, 0.9, 0.8, and 0.7. More specifically, R22 and R31 can further satisfy: 0.8 ≤ R22 / R31 ≤ 1.2. Controlling the ratio of R22 to R31 within this range can further reduce the overall system sensitivity, improve resolution, and further enhance system performance. R22 and R31 can also be further satisfied: 0.9 ≤ R22 / R31 ≤ 1.1.

[0161] In an exemplary embodiment, the optical lens according to this application satisfies: -5 ≤ R41 / TTL < 0, where R41 is the radius of curvature of the first side surface of the fourth lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. By controlling the ratio of the radius of curvature of the first side surface of the fourth lens to the total length of the optical system within this range, the first side surface (object side) of the fourth lens is concave and has a large radius of curvature. This changes the relative position of the pupil image of the secondary reflection ghost image on the focal plane. By controlling the radius of curvature, the pupil image of the ghost image can be moved away from the focal plane, effectively reducing the relative energy value of the ghost image and improving the quality of the image captured by the lens. In an exemplary embodiment, R41 / TTL can be equal to values ​​such as -5, -3, -1.5, -0.7, -0.3, -0.1, and -0.05. More specifically, R41 and TTL can further satisfy: -1.5≤R41 / TTL≤-0.1. By controlling the ratio of R41 to TTL within this range, the quality of the image captured by the lens can be further improved.

[0162] In an exemplary embodiment, the optical lens according to this application satisfies: -8 ≤ R41 / F < 0, 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. By 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, the concave surface of the first side surface (object side surface) of the fourth lens enables a small aperture to receive and diverge light transmitted from the front system, allowing peripheral light to reach a higher imaging position, which is beneficial for use with large chip sizes. In an exemplary embodiment, R41 / F can be equal to values ​​such as -7, -5.5, -4, -2.5, -1.5, -1.0, -0.5, -0.2, -0.1, and -0.05.

[0163] More specifically, R41 and F can further satisfy: -5≤R41 / F≤-0.2. By controlling the ratio of R41 to F within this range, the light transmittance can be further increased. R41 and F can also be further satisfied: -2≤R41 / F≤-0.35.

[0164] In an exemplary embodiment, the optical lens according to this application satisfies: -9 ≤ R42 / F < 0, where R42 is the radius of curvature of the second side surface of the fourth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the radius of curvature of the second side surface of the fourth lens to the total effective focal length of the optical lens within this range, it is possible to moderately converge forward light rays, smooth the light path, correct aberrations, and improve resolution. In an exemplary embodiment, R42 / F may be equal to values ​​such as -9, -6, -3, -2, -1, -0.5, -0.2, and -0.1.

[0165] More specifically, R42 and F can further satisfy: -6≤R42 / F≤-0.2. Controlling the ratio of R42 to F within this range can change the trajectory of edge rays, allowing the emitted light to transition smoothly to the rear optical system, which is beneficial for reducing the front aperture of the lens and achieving miniaturization. R42 and F can also be further satisfied that -2.5≤R42 / F≤-0.4.

[0166] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.1≤(SAG41 / D41) / (SAG42 / D42)≤3, where SAG41 is the sag of the first side of the fourth lens, D41 is the maximum effective clear aperture of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sag of the second side of the fourth lens, and D42 is the maximum effective clear aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens. By controlling the sag and the maximum effective clear aperture of the first side and the second side of the fourth lens to satisfy the conditional expression 0.1≤(SAG41 / D41) / (SAG42 / D42), the sag and effective aperture of the fourth lens are reasonably set, so that the shapes of the two surfaces of the fourth lens are close to each other, which enables peripheral light to transition gently, is beneficial to reducing the sensitivity of the lens, increasing the overall light throughput, and simultaneously realizing the telephoto of the entire system. More specifically, SAG41, D41, SAG42 and D42 may further satisfy: 0.4≤(SAG41 / D41) / (SAG42 / D42)≤1.8. Controlling the optical lens to satisfy this conditional expression can further help reduce the lens sensitivity, increase the overall light throughput, and better realize the telephoto of the entire system at the same time.

[0167] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0<R51 / F≤8, where R51 is the radius of curvature of the first side of the fifth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the radius of curvature of the first side of the fifth lens to the total effective focal length of the optical lens within this range, it is beneficial to reduce the distribution range of light rays of the same field of view on the image side, weaken the coupling relationship between light rays of different fields of view on the image side, facilitate better correction of light rays of each field of view, and improve the resolution capability of the system. In an exemplary embodiment, R51 / F may be equal to values such as 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 4.0, 6, and 8, for example.

[0168] More specifically, R51 and F may further satisfy: 0.2≤R51 / F≤6. Controlling the ratio of R51 to F within this range can further converge the front light and reduce the rear aperture. R51 and F may even further satisfy: 0.4≤R51 / F≤4.

[0169] In an exemplary embodiment, the optical lens according to this application satisfies: -5 ≤ F8 / F, where 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 light emitted from the seventh lens can be moderately diverged, further enabling large-angle light to transition as smoothly as possible, reducing light energy loss caused by excessive angle between large field-of-view light and the chip's principal ray when reaching the image plane, which is beneficial for improving the illumination of the edge field of view; and also helps to balance various aberrations, improve resolution, and simultaneously achieve long focal length and low distortion for the entire system. In an exemplary embodiment, F8 / F can be equal to values ​​such as -7, -5, -2.5, -1, -0.5, -0.2, and -0.1. More specifically, F8 and F can further satisfy: -3≤F8 / F≤-0.3. Controlling the ratio of F8 to F within this range can further improve the illumination of the edge field of view; it is also beneficial to balance various aberrations, improve resolution, and better achieve long focal length and small distortion of the whole system.

[0170] In an exemplary embodiment, the optical lens according to this application satisfies: -5 ≤ R81 / F < 0, where R81 is the radius of curvature of the first side surface of the eighth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the radius of curvature of the first side surface of the eighth lens to the total effective focal length of the optical lens within this range, it is beneficial to correct aberrations and improve resolution. In an exemplary embodiment, R81 / F may be equal to values ​​such as -5, -2, -1.5, -1.0, -0.4, -0.2, and -0.1.

[0171] More specifically, R81 and F can further satisfy: -3≤R81 / F≤-0.25. Controlling the ratio of R81 to F within this range can help smooth the light path, making the light from a large field of view converge more on the image plane, which is beneficial to improving image quality, achieving high resolution, as well as long focal length and small distortion of the whole system.

[0172] In an exemplary embodiment, the optical lens according to this application satisfies the following ratio: 0.025 ≤ d34 / TTL ≤ 0.5, where d34 is the air gap between the third and fourth 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 third and fourth 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, a larger gap between the third and fourth lenses is maintained, which is beneficial for effectively converging the light entering the optical system, reducing the lens aperture at the rear end of the optical system, and reducing the system's assembly sensitivity. More specifically, d34 and TTL can further satisfy: 0.035 ≤ d34 / TTL ≤ 0.25. Controlling the ratio of d34 to TTL within this range can further reduce the lens aperture at the rear end of the optical system and further reduce the system's assembly sensitivity.

[0173] In an exemplary embodiment, the optical lens according to this application satisfies: |R32 / R41|≤18, 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 absolute value of 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 for the light emitted from the third lens to be better received by the fourth lens and transmitted to the rear system, thereby achieving high light transmission and improving resolution. In an exemplary embodiment, |R32 / R41| can be equal to values ​​such as 17, 10, 5, 2, and 0.5. More specifically, R32 and R41 can further satisfy: |R32 / R41|≤12. Controlling the absolute value of the ratio of R32 and R41 within this range can further achieve high light transmission and improve resolution. R32 and R41 can also further satisfy: |R32 / R41|≤8.5.

[0174] In an exemplary embodiment, the optical lens according to this application satisfies: 0.01 ≤ d78 / TTL ≤ 0.4, where d78 is the air gap between the seventh and eighth 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 surface of the optical lens. By controlling the ratio of the air gap between the seventh and eighth 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, it is beneficial to smooth the light path, reduce the sensitivity of the eighth lens, improve resolution, and simultaneously reduce the height of light entering the eighth lens, thus reducing the rear aperture. More specifically, d78 and TTL can further satisfy: 0.02 ≤ d78 / TTL ≤ 0.15. Controlling the ratio of d78 to TTL within this range can further reduce the sensitivity of the eighth lens, improve resolution, and further reduce the rear aperture. d78 and TTL can also further satisfy: 0.02 ≤ d78 / TTL ≤ 0.085.

[0175] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ R41 / R42 ≤ 10, where R41 is the radius of curvature of the first side of the fourth lens and R42 is the radius of curvature of the second side of the fourth lens. By controlling the ratio of the radius of curvature of the first side of the fourth lens to the radius of curvature of the second side of the fourth lens within this range, the light emitted from the third lens can smoothly transition to the rear optical system, which is beneficial for reducing the front diameter of the lens, reducing the lens volume, and achieving miniaturization and cost reduction. More specifically, R41 and R42 can further satisfy: 0.3 ≤ R41 / R42 ≤ 5. Controlling the ratio of R41 and R42 within this range can further reduce the front diameter of the lens, reduce the lens volume, and better achieve miniaturization and cost reduction. R41 and R42 can also further satisfy: 0.45 ≤ R41 / R42 ≤ 2.

[0176] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ |F4 / F|, where F4 is the effective focal length of the fourth lens and F is the total effective focal length of the optical lens. By controlling the absolute value of the ratio of the effective focal length of the fourth lens to the total effective focal length of the optical lens within this range, light entering through the object side of the fourth lens is compressed to a certain extent, which is beneficial for collecting large-angle light within a limited space; at the same time, light exiting through the image side of the fourth lens is diverged to a certain extent, resulting in a larger effective aperture when the light enters the rear optical system, which is beneficial for improving the relative illumination of the system.

[0177] More specifically, F4 and F can further satisfy: 1.8 ≤ |F4 / F|. Controlling the absolute value of the ratio of F4 to F within this range can be more conducive to the collection of large-angle light and can further improve the relative illumination of the system. F4 and F can also further satisfy: 2.5 ≤ |F4 / F| ≤ 45.

[0178] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ R41 / (R42+d4) ≤ 5, where R41 is the radius of curvature of the first side of the fourth lens, R42 is the radius of curvature of the second side of the fourth lens, and d4 is the center thickness of the fourth lens on the optical axis. By controlling the radius of curvature of the first side of the fourth lens, the radius of curvature of the second side of the fourth lens, and the center thickness of the fourth lens on the optical axis to satisfy the condition 0.1 ≤ R41 / (R42+d4) ≤ 5, the shape of the fourth lens is set to be close to a concentric circle, so that the light emitted from the third lens smoothly transitions to the rear optical system, which is beneficial to reducing the front diameter of the lens, reducing the lens volume, and achieving miniaturization and cost reduction. More specifically, R41, R42, and d4 can further satisfy: 0.4 ≤ R41 / (R42+d4) ≤ 3.5. Controlling R41, R42, and d4 to satisfy 0.4 ≤ R41 / (R42+d4) ≤ 3.5 is beneficial for further reducing the lens front diameter, reducing the lens size, and better achieving miniaturization and cost reduction. R41, R42, and d4 can also be further satisfied: 0.65 ≤ R41 / (R42+d4) ≤ 2.6.

[0179] In an exemplary embodiment, the optical lens according to this application satisfies: |R21 / R32|≤10, where R21 is the radius of curvature of the first side surface of the second lens and R32 is the radius of curvature of the second side surface of the third lens. By controlling the absolute value of the ratio of the radius of curvature of the first side surface of the second lens to the radius of curvature of the second side surface of the third lens within this range, the light path when incident from the object side surface of the second lens to the image side surface of the third lens is smooth. When the ratio is close to 1, the light deflection is small, which is beneficial to reducing the lens sensitivity. More specifically, R21 and R32 can further satisfy: 0.1≤|R21 / R32|≤5. Controlling the absolute value of the ratio of R21 and R32 within this range can further reduce the light deflection and further reduce the lens sensitivity. R21 and R32 can also further satisfy: 0.2≤|R21 / R32|≤2.5.

[0180] In an exemplary embodiment, the optical lens according to this application satisfies the condition: 50° ≤ (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 50° ≤ (FOV × F) / H, it helps to balance the overall lens effect with long focal lengths and improve resolution, achieving low distortion of the entire lens. More specifically, FOV, F, and H can further satisfy: 54° ≤ (FOV × F) / H ≤ 80°. Controlling FOV, F, and H to satisfy 54° ≤ (FOV × F) / H ≤ 80° can further help to balance the overall lens effect with long focal lengths and further improve resolution, better achieving low distortion of the entire lens. FOV, F, and H can also further satisfy: 54° ≤ (FOV × F) / H ≤ 65°.

[0181] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / F ≤ 4, where TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens to the total effective focal length of the optical lens within this range, the total length of the lens is shorter for the same focal length, which is beneficial for miniaturization. More specifically, TTL and F can further satisfy: TTL / F ≤ 3.2. Controlling the ratio of TTL to F within this range can better achieve miniaturization. TTL and F can also be further satisfied: TTL / F ≤ 2.5.

[0182] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / H / FOV ≤ 0.3, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. By controlling 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, the image height corresponding to the maximum field of view of the optical lens, and the maximum field of view of the optical lens to satisfy the condition TTL / H / FOV ≤ 0.3, the total length of the lens is smaller when the image height corresponding to the maximum field of view and the maximum field of view remain unchanged, which is beneficial for miniaturization. More specifically, TTL, H, and FOV can further satisfy: TTL / H / FOV ≤ 0.2. Controlling TTL, H, and FOV to satisfy TTL / H / FOV ≤ 0.2 can better achieve miniaturization. TTL, H, and FOV can also further satisfy: TTL / H / FOV ≤ 0.15.

[0183] In an exemplary embodiment, the optical lens according to this application satisfies: D / H / θ≤5, where D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens. By controlling the maximum effective aperture of the first side of the first lens corresponding to 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 radian value corresponding to the maximum field of view of the optical lens to satisfy the condition D / H / θ≤5, while keeping the image height and radian value corresponding to the maximum field of view of the optical lens unchanged, the maximum aperture of the lens is smaller, thus achieving miniaturization. More specifically, D, H, and θ can further satisfy: D / H / θ≤4.2. Controlling D, H, and θ to satisfy: D / H / θ≤4.2 can better achieve miniaturization. D, H, and θ can also further satisfy: D / H / θ≤3.5.

[0184] In an exemplary embodiment, the optical lens according to this application satisfies: 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. By controlling the ratio of the total effective focal length to the entrance pupil diameter of the optical lens within this range, a small FNO can be achieved, which is beneficial for increasing the amount of light transmitted and making the brightness of the peripheral and central fields of view more uniform. In an exemplary embodiment, F / ENPD can be equal to values ​​such as 2, 1.8, 1.7, 1.5, 1.4, and 1.2. More specifically, F and ENPD can further satisfy: F / ENPD ≤ 1.8. Controlling the ratio of F and ENPD within this range can further increase the amount of light transmitted and make the brightness of the peripheral and central fields of view more uniform. F and ENPD can also further satisfy: 1.2 ≤ F / ENPD ≤ 1.8. And can further satisfy: 1.4 ≤ F / ENPD ≤ 1.7.

[0185] In an exemplary embodiment, the optical lens according to this application satisfies: 0.7 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.6, 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 condition 0.7 ≤ (H / 2) / (F×tan(θ / 2)), under the condition that the ideal image height remains unchanged, the closer the actual image height is to the ideal image height, the smaller the lens distortion. More specifically, H, F, and θ can further satisfy: 0.85 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.2. Controlling H, F, and θ to satisfy 0.85 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.2 can further achieve small lens distortion.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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, small distortion and high performance, so that the optical lens can better adapt to the ever-evolving requirements of automotive front-view lens applications.

[0190] 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.

[0191] Example 1

[0192] 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.

[0193] 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.

[0194] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0195] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0196] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0197] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0198] 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.

[0199]

[0200]

[0201] Table 1

[0202] Example 2

[0203] 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.

[0204] 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.

[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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0206] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0207] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0208] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0209] 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.

[0210]

[0211]

[0212] Table 2

[0213] Example 3

[0214] 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.

[0215] 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.

[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 concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0217] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0218] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0219] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0220] 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.

[0221]

[0222] Table 3

[0223] Example 4

[0224] The following is for reference Figure 4 The 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.

[0225] 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.

[0226] 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 concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0227] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0228] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0229] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0230] 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.

[0231]

[0232]

[0233] Table 4

[0234] Example 5

[0235] 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.

[0236] 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.

[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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0238] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0239] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0240] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0241] 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.

[0242]

[0243] Table 5

[0244] Example 6

[0245] 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.

[0246] 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.

[0247] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S10 is concave, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0248] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0249] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0250] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0251] 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.

[0252]

[0253] Table 6

[0254] Example 7

[0255] 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.

[0256] 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.

[0257] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0258] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0259] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0260] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0261] 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.

[0262]

[0263]

[0264] Table 7

[0265] Example 8

[0266] The following is for reference Figure 8 The 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.

[0267] 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.

[0268] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0269] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0270] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0271] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0272] 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.

[0273]

[0274] Table 8

[0275] Example 9

[0276] 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.

[0277] 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.

[0278] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form the second cemented lens.

[0279] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0280] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0281] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0282] 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.

[0283]

[0284] Table 9

[0285] Example 10

[0286] 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.

[0287] 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.

[0288] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form the second cemented lens.

[0289] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0290] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0291] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0292] 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.

[0293]

[0294]

[0295] Table 10

[0296] Example 11

[0297] 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.

[0298] 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.

[0299] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form the second cemented lens.

[0300] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0301] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0302] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0303] 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.

[0304]

[0305] Table 11

[0306] Example 12

[0307] The following is for reference Figure 12 The 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.

[0308] 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.

[0309] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The 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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form the second cemented lens.

[0310] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0311] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0312] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0313] 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.

[0314]

[0315] Table 12

[0316] Example 13

[0317] 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.

[0318] 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.

[0319] 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 convex-concave lens with negative optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The 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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0320] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0321] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0322] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0323] 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.

[0324]

[0325]

[0326] Table 13

[0327] Example 14

[0328] 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.

[0329] 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.

[0330] 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 convex-concave lens with negative optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The 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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the fifth lens L5 and the sixth lens L6 are cemented together to form a second cemented lens.

[0331] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0332] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0333] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0334] 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.

[0335]

[0336] Table 14

[0337] Example 15

[0338] The following is for reference Figure 15 The optical lens according to Embodiment 15 of this application is described. Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown.

[0339] like Figure 15 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.

[0340] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0341] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0342] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0343] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0344] Table 15 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 15.

[0345]

[0346]

[0347] Table 15

[0348] Example 16

[0349] The following is for reference Figure 16 The optical lens according to Embodiment 16 of this application is described. Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this application is shown.

[0350] like Figure 16 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.

[0351] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0352] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0353] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0354] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0355] Table 16 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 16.

[0356]

[0357]

[0358] Table 16

[0359] Example 17

[0360] The following is for reference Figure 17 The optical lens according to Embodiment 17 of this application is described. Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 17 of this application is shown.

[0361] like Figure 17 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.

[0362] 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 concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form the second cemented lens.

[0363] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0364] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0365] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0366] Table 17 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 17.

[0367]

[0368] Table 17

[0369] Example 18

[0370] The following is for reference Figure 18 The optical lens according to Embodiment 18 of this application is described. Figure 18 A schematic diagram of the structure of an optical lens according to Embodiment 18 of this application is shown.

[0371] like Figure 18 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.

[0372] 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 concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form the second cemented lens.

[0373] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0374] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0375] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0376] Table 18 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 18.

[0377]

[0378]

[0379] Table 18

[0380] Example 19

[0381] The following is for reference Figure 19 Describes an optical lens according to Embodiment 19 of this application. Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this application is shown.

[0382] like Figure 19 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.

[0383] 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 convex-concave lens with negative optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0384] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0385] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0386] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0387] Table 19 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 19.

[0388]

[0389]

[0390] Table 19

[0391] Example 20

[0392] The following is for reference Figure 20 Describes an optical lens according to Embodiment 20 of this application. Figure 20 A schematic diagram of the structure of an optical lens according to Embodiment 20 of this application is shown.

[0393] like Figure 20 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.

[0394] 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 convex-concave lens with negative optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0395] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0396] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0397] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0398] Table 20 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 20.

[0399]

[0400] Table 20

[0401] Example 21

[0402] The following is for reference Figure 21 The optical lens according to Embodiment 21 of this application is described. Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 21 of this application is shown.

[0403] like Figure 21 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.

[0404] 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 convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0405] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0406] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0407] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0408] Table 21 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 21.

[0409]

[0410]

[0411] Table 21

[0412] Example 22

[0413] The following is for reference Figure 22 The optical lens according to Embodiment 22 of this application is described. Figure 22 A schematic diagram of the structure of an optical lens according to Embodiment 22 of this application is shown.

[0414] like Figure 22 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.

[0415] 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 convex-convex lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0416] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0417] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0418] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0419] Table 22 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 22.

[0420]

[0421] Table 22

[0422] Example 23

[0423] The following is for reference Figure 23 The optical lens according to Embodiment 23 of this application is described. Figure 23 A schematic diagram of the structure of an optical lens according to Embodiment 23 of this application is shown.

[0424] like Figure 23 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.

[0425] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0426] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0427] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0428] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0429] Table 23 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 23.

[0430]

[0431] Table 23

[0432] Example 24

[0433] The following is for reference Figure 24 The optical lens according to Embodiment 24 of this application is described. Figure 24 A schematic diagram of the structure of an optical lens according to Embodiment 24 of this application is shown.

[0434] like Figure 24 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.

[0435] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-convex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. 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 second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0436] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0437] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0438] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0439] Table 24 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 24.

[0440]

[0441]

[0442] Table 24

[0443] Example 25

[0444] The following is for reference Figure 25 The optical lens according to Embodiment 25 of this application is described. Figure 25 A schematic diagram of the structure of an optical lens according to Embodiment 25 of this application is shown.

[0445] like Figure 25 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.

[0446] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0447] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0448] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0449] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0450] Table 25 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 25.

[0451]

[0452] Table 25

[0453] Example 26

[0454] The following is for reference Figure 26 The optical lens according to Embodiment 26 of this application is described. Figure 26 A schematic diagram of the structure of an optical lens according to Embodiment 26 of this application is shown.

[0455] like Figure 26 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.

[0456] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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-concave lens with negative optical power, its first side surface S14 is concave, and its second side surface S15 is concave. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens.

[0457] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the second side surface S5 of the third lens L3.

[0458] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0459] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0460] Table 26 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 26.

[0461]

[0462] Table 26

[0463] Example 27

[0464] The following is for reference Figure 27 Describes an optical lens according to Embodiment 27 of this application. Figure 27 A schematic diagram of the structure of an optical lens according to Embodiment 27 of this application is shown.

[0465] like Figure 27 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.

[0466] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form the second cemented lens.

[0467] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0468] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0469] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0470] Table 27 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 27.

[0471]

[0472]

[0473] Table 27

[0474] Example 28

[0475] The following is for reference Figure 28 Describes an optical lens according to Embodiment 28 of this application. Figure 28 A schematic diagram of the structure of an optical lens according to Embodiment 28 of this application is shown.

[0476] like Figure 28 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.

[0477] 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 convex-concave lens with positive optical power, its first side surface S4 is convex, and its second side surface S5 is concave. The fourth lens L4 is a concave-convex lens with negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface 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-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 second lens L2 and the third lens L3 are cemented together to form the first cemented lens; the sixth lens L6 and the seventh lens L7 are cemented together to form the second cemented lens.

[0478] The optical lens also includes an aperture stop STO positioned between the third lens L3 and the fourth lens L4. This facilitates effective light convergence entering the optical system, reduces the aperture of the lenses at the rear of the optical system, and lowers the system's assembly sensitivity. For example, the aperture stop STO can be positioned between the third lens L3 and the fourth lens L4, near the first side surface S7 of the fourth lens L4.

[0479] In this embodiment, the optical lens may further include a filter and a protective glass disposed between the eighth lens L8 and the imaging plane (IMA). The filter may have, for example, a first side surface S16 and a second side surface S17, and the protective glass may have, for example, a first side surface S18 and a second side surface S19.

[0480] When the optical lens is used for imaging, light from the object passes through each surface S1 to S19 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 S19 to S1 in sequence and is finally projected onto the target object (not shown).

[0481] Table 28 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 28.

[0482]

[0483] Table 28

[0484] In summary, the parameter values ​​in Examples 1 to 28 are shown in Tables 29-1, 29-2, 29-3 and 29-4, respectively. The units of F, TTL, BFL, H, D, Dmax, ENPD, F1-F8, R21, R22, R31, R32, R41, R42, R51, R72, R81, D41, D42, SAG41, SAG42, F23, d23, d34, d78 and d4 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0485]

[0486]

[0487] Table 29-1

[0488]

[0489]

[0490] Table 29-2

[0491]

[0492]

[0493] Table 29-3

[0494]

[0495]

[0496] Table 29-4 and Examples 1 to 28 respectively satisfy the relationships shown in Tables 30-1, 30-2, 30-3 and 30-4 below.

[0497] F1 / F 2.9699 2.9452 2.0495 2.1110 1.3350 1.4052 3.3246 d23 / TTL 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 |F23 / F| 2.9068 2.8826 1.9944 1.8787 1.4119 1.5264 6.0872 R22 / R31 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 R41 / TTL -0.2580 -0.2545 -0.3399 -0.3343 -0.1939 -0.1939 -0.2652 R41 / F -0.5366 -0.5268 -0.7445 -0.7160 -0.4152 -0.4164 -0.5716 R42 / F -0.7512 -0.7449 -0.8017 -0.7711 -0.6024 -0.6042 -0.8374 (SAG41 / D41) / (SAG42 / D42) 1.0529 1.0750 0.9262 0.9396 1.0267 1.0105 1.0623 R51 / F 0.6335 0.6283 0.6789 0.6529 0.9777 0.9806 0.7325 F8 / F -0.7791 -0.7726 -0.6434 -0.6188 -1.0599 -1.0631 -0.6804 R81 / F -0.5216 -0.5172 -0.5346 -0.5142 -0.7279 -0.7301 -0.6179 d34 / TTL 0.1010 0.1006 0.0430 0.0423 0.1509 0.1509 0.0915 |R32 / R41| 0.9770 0.9868 1.4346 1.4346 1.2693 1.2693 0.8301 d78 / TTL 0.0274 0.0273 0.0277 0.0272 0.0381 0.0381 0.0262 R41 / R42 0.7144 0.7072 0.9286 0.9286 0.6892 0.6892 0.6826 |F4 / F| 7.0264 6.4400 31.3984 30.1972 6.7349 6.7550 5.9554 R41 / (R42+d4) 1.2505 1.2380 1.1615 1.1615 1.4721 1.4721 1.2248 |R21 / R32| 1.1234 1.1234 1.1170 1.0980 1.3260 1.2866 1.0413 (FOV×F) / H 58.2808 58.2673 57.2626 57.0493 55.8783 55.9379 56.9396 TTL / F 2.0800 2.0704 2.1902 2.1420 2.1417 2.1480 2.1555 TTL / H / FOV 0.1023 0.1018 0.1059 0.1031 0.1010 0.1014 0.1036 D / H / θ 2.1784 2.1598 2.2413 2.1479 2.1579 2.1658 2.1915 F / ENPD 1.6000 1.6000 1.6000 1.6000 1.6000 1.6000 1.6000 (H / 2) / (F×tan(θ / 2)) 0.9534 0.9536 0.9704 0.9740 0.9944 0.9934 0.9759

[0498] Table 30-1

[0499]

[0500]

[0501] Table 30-2

[0502]

[0503]

[0504] Table 30-3

[0505]

[0506]

[0507] Table 30-4

[0508] 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.

[0509] 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; A third lens with optical power; The fourth lens with optical power has a concave first side and a convex second side. The fifth lens, which has optical power, has a convex first side surface; A sixth lens with optical power; A seventh lens with optical power; and The eighth lens, which has negative optical power, has a concave first side surface; The optical lens has eight lenses with optical power. The second lens and the third lens are cemented together to form a cemented doublet lens, and the second lens and the third lens have opposite optical power properties; at most one of the second lens and the fourth lens has positive optical power; Two lenses from the fifth, sixth, and seventh lenses are cemented together to form a cemented doublet lens. The fifth, sixth, and seventh lenses each have one lens with negative optical power and two lenses with positive optical power. When the sixth lens has negative optical power, both the second and fourth lenses also have negative optical power. The radius of curvature R41 of the first side surface of the fourth lens, the radius of curvature R42 of the second side surface of the fourth lens, and the center thickness d4 of the fourth lens on the optical axis satisfy: 0.4≤R41 / (R42+d4)≤3.5; The air gap d34 between the third lens and the fourth 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 the following condition: 0.025≤d34 / TTL≤0.

25.

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 second lens has positive optical power, with its first side surface being convex and its second side surface being concave.

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

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

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

7. The optical lens according to claim 1, characterized in that, The fourth lens has either positive or negative optical power.

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

9. The optical lens according to claim 1, characterized in that, The fifth lens has negative optical power, and its second side surface is concave.

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

11. The optical lens according to claim 1, characterized in that, The sixth lens has negative optical power. The first side surface of the sixth lens is convex, and the second side surface is concave; or The first side of the sixth lens is concave, and the second side is convex.

12. The optical lens according to claim 1, characterized in that, The seventh lens has negative optical power, and its first side surface is concave and its second side surface is convex.

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

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

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

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

17. The optical lens according to any one of claims 1 to 16, characterized in that, The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 0.4≤F1 / F≤10.

18. The optical lens according to any one of claims 1 to 16, 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: d23 / TTL≤0.

05.

19. The optical lens according to claim 18, characterized in that, It satisfies: d23 / TTL≤0.

01.

20. The optical lens according to any one of claims 1 to 16, characterized in that, The combined focal length F23 of the second lens and the third lens satisfies the following condition with respect to the total effective focal length F of the optical lens: |F23 / F|≤30.

21. The optical lens according to any one of claims 1 to 16, 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: 0.8≤R22 / R31≤1.

2.

22. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R41 of the first side surface of the fourth lens and the distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: -1.5≤R41 / TTL<0.

23. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R41 of the first side of the fourth lens and the total effective focal length F of the optical lens satisfy: -5≤R41 / F<0.

24. The optical lens according to claim 23, characterized in that, It satisfies: -2≤R41 / F≤-0.

2.

25. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R42 of the second side surface of the fourth lens and the total effective focal length F of the optical lens satisfy: -6≤R42 / F<0.

26. The optical lens according to claim 25, characterized in that, It satisfies: -2.5≤R42 / F≤-0.

2.

27. The optical lens according to any one of claims 1 to 16, characterized in that, The sagitta SAG41 of the first side of the fourth lens, the maximum effective aperture D41 of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, the sagitta SAG42 of the second side of the fourth lens, and the maximum effective aperture D42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: 0.1≤(SAG41 / D41) / (SAG42 / D42)≤1.

8.

28. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R51 of the first side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: 0 < R51 / F ≤ 6.

29. The optical lens according to claim 28, characterized in that, It satisfies: 0.2≤R51 / F≤4.

30. The optical lens according to any one of claims 1 to 16, 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 following condition: -5≤F8 / F.

31. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R81 of the first side surface of the eighth lens and the total effective focal length F of the optical lens satisfy: -5≤R81 / F<0.

32. The optical lens according to claim 31, characterized in that, It satisfies: -3≤R81 / F≤-0.

25.

33. The optical lens according to any one of claims 1 to 16, characterized in that, The air gap d34 between the third lens and the fourth 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 the following condition: 0.035≤d34 / TTL≤0.

25.

34. The optical lens according to any one of claims 1 to 16, 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: |R32 / R41|≤12.

35. The optical lens according to any one of claims 1 to 16, characterized in that, The air gap d78 between the seventh lens and the eighth 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 the following condition: 0.01≤d78 / TTL≤0.

15.

36. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R41 of the first side surface of the fourth lens and the radius of curvature R42 of the second side surface of the fourth lens satisfy: 0.3≤R41 / R42≤2.

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

38. The optical lens according to claim 37, characterized in that, It satisfies: 1.8≤|F4 / F|≤45.

39. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R41 of the first side surface of the fourth lens, the radius of curvature R42 of the second side surface of the fourth lens, and the center thickness d4 of the fourth lens on the optical axis satisfy: 0.4≤R41 / (R42+d4)≤2.

6.

40. The optical lens according to any one of claims 1 to 16, characterized in that, The radius of curvature R21 of the first side surface of the second lens and the radius of curvature R32 of the second side surface of the third lens satisfy: |R21 / R32|≤2.

5.

41. The optical lens according to any one of claims 1 to 16, 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: 50° ≤ (FOV × F) / H ≤ 80°.

42. The optical lens according to any one of claims 1 to 16, 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≤4.

43. The optical lens according to any one of claims 1 to 16, 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×1°≤0.

2.

44. The optical lens according to any one of claims 1 to 16, characterized in that, The maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤4.

2.

45. The optical lens according to any one of claims 1 to 16, 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≤1.

8.

46. ​​The optical lens according to any one of claims 1 to 16, 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: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.

6.

47. The optical lens according to any one of claims 1 to 16, characterized in that, The optical lens satisfies one of the following conditions: 0.8≤F1 / F≤8; |F23 / F|≤20; 0.9≤R22 / R31≤1.1; -1.5≤R41 / TTL≤-0.1; -2≤R41 / F≤-0.35; -2.5≤R42 / F≤-0.4; 0.4≤(SAG41 / D41) / (SAG42 / D 42)≤1.8; 0.4≤R51 / F≤4; -3≤F8 / F≤-0.3; -1.9689≤R81 / F≤-0.25; 0.035≤d34 / TTL≤0.1610; |R32 / R41|≤8.5; 0.02≤d78 / TTL≤0.085; 0.45 ≤R41 / R42≤2; 2.5≤|F4 / F|≤45; 0.65≤R41 / (R42+d4)≤2.6; 0.2≤|R21 / R32|≤2.5; 54°≤(FOV×F) / H≤65°; TTL / F≤2.5; 1.9908≤TTL / F≤3.2; T TL / H / FOV×1°≤0.15; 0.0964≤TTL / H / FOV×1°≤0.15; D / H / θ≤3.5; 2.0570≤D / H / θ≤3.5; 1.2≤F / ENPD≤1.8; 0.85≤(H / 2) / (F×tan(θ / 2))≤1.2; Wherein, F1 is the effective focal length of the first lens, F is the total effective focal length of the optical lens, F23 is the combined focal length of the second and third lenses, R22 is the radius of curvature of the second side surface of the second lens, R31 is the radius of curvature of the first side surface of the third lens, SAG41 is the sag of the first side surface of the fourth lens, D41 is the maximum effective aperture of the first side surface of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sag of the second side surface of the fourth lens, D42 is the maximum effective aperture of the second side surface of the fourth lens corresponding to the maximum field of view of the optical lens, and R51 is the curvature of the first side surface of the fifth lens. Radius, F8 is the effective focal length of the eighth lens, R81 is the radius of curvature of the first side of the eighth lens, R32 is the radius of curvature of the second side of the third lens, d78 is the air gap between the seventh lens and the eighth lens on the optical axis, F4 is the effective focal length of the fourth lens, R21 is the radius of curvature of the first side of the second lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first 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, and ENPD is the entrance pupil diameter of the optical lens.

48. The optical lens according to any one of claims 1 to 16, characterized in that, The optical lens satisfies one of the following conditions: 1.3350≤F1 / F≤6.4937;d23 / TTL=0,1.4119≤|F23 / F|≤16.6444;R22 / R31=1.0000;-0.3633≤R41 / TTL≤-0.1939;-0.7679≤R41 / F≤-0.4152;-1.4140≤R42 / F≤-0.6024;0.6828≤(SAG41 / D41) / (SAG42 / D42)≤1.3839;0.4827≤R51 / F≤3.1884;-1.7687≤F8 / F≤-0.6188;-1.9689≤R81 / F≤-0.4698;0.0423≤d34 / TTL≤0.1610;0.6690≤|R32 / R41|≤6.5197;0.0232≤d78 / TTL≤0.0796;0.5431≤R41 / R42≤1.0017;2.8845≤|F4 / F|≤31.3984;0.7266≤R41 / (R42+d4)≤2.2628;0.2937≤|R21 / R32|≤1.3260;55.8783°≤(FOV×F) / H≤58.5596°;1.9908≤TTL / F≤2.1902;0.0964≤TTL / H / FOV×1°≤0.1060;2.0570≤D / H / θ≤3.0316;1.4≤F / ENPD≤1.7;0.9489≤(H / 2) / (F×tan(θ / 2))≤0.9944; Wherein, F1 is the effective focal length of the first lens, F is the total effective focal length of the optical lens, d23 is the air gap between the second and third lenses on the optical axis, F23 is the combined focal length of the second and third lenses, R22 is the radius of curvature of the second side surface of the second lens, R31 is the radius of curvature of the first side surface of the third lens, SAG41 is the sag of the first side surface of the fourth lens, D41 is the maximum effective aperture of the first side surface of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sag of the second side surface of the fourth lens, D42 is the maximum effective aperture of the second side surface of the fourth lens corresponding to the maximum field of view of the optical lens, and R51 is the maximum effective aperture of the second side surface of the fourth lens. F8 is the radius of curvature of the first side surface of the fifth lens, R81 is the radius of curvature of the first side surface of the eighth lens, R32 is the radius of curvature of the second side surface of the third lens, d78 is the air gap between the seventh and eighth lenses on the optical axis, F4 is the effective focal length of the fourth lens, R21 is the radius of curvature of the first side surface of the second lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum effective aperture of the first side surface 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, and ENPD is the entrance pupil diameter of the optical lens.

49. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-48 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images