Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. According to the optical lens, a first lens has positive focal power, and the first side face of the first lens is a convex face; the first side surface of the second lens and the second side surface of the second lens are opposite in surface shape; the third lens has positive focal power, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface; the fourth lens has negative focal power, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the second side surface of the fifth lens is a convex surface; the sixth lens has focal power, and the first side surface of the sixth lens is a convex surface; the seventh lens has focal power; the eighth lens has negative focal power, and the second side surface of the eighth lens is a concave surface. The problems that in the prior art, an optical lens is small in light passing quantity, high resolution and small caliber cannot be considered at the same time, lens design is limited by miniaturization, sensitivity is high, aberration and the like cannot be well balanced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and an electronic device. Background Art

[0002] With the development of science and technology, the application scenarios of optical lenses are gradually increasing, and users' requirements for the optical performance of optical lenses are gradually increasing. At present, optical lenses are gradually developing in the direction of miniaturization. Due to size limitations, optical lenses have problems such as sensitivity, aberrations, etc. that are difficult to balance, and poor imaging quality in dark environments. As the indispensable "eyes" of cars, automotive lenses play a vital role in intelligent driving. With the rapid development of automatic driving assistance systems, users' demand for automotive lenses is also increasing. At the same time, in order to meet the requirements of safe driving and meet the special installation position of automotive lenses, automotive lenses in automatic driving assistance systems have more special requirements.

[0003] With the continuous change and improvement of semiconductor technology, the pixel of the chip is also gradually increasing, which means that the car lens matched with the chip also needs to improve its performance to meet the needs of the chip. At the same time, the car space is also being optimized, and the size of the car lens needs to be smaller and smaller, which leads to the gradual reduction of the aperture of the car lens, which in turn leads to problems such as poor resolution, high sensitivity, and large aberrations of the car lens. At the same time, it also causes problems such as low light transmittance and inability to form clear images in dark environments.

[0004] In other words, the optical lenses in the prior art have problems such as low light transmittance, inability to balance high resolution and small aperture, and miniaturization limiting lens design, resulting in high sensitivity and poor balance of aberrations. Summary of the invention

[0005] The main purpose of the present invention is to provide an optical lens and an electronic device to solve at least one of the problems of the optical lens in the prior art, namely, small light transmittance, inability to balance high resolution and small aperture, miniaturization limiting lens design, resulting in high sensitivity, poor balance of aberrations, etc.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive optical power, and a first side surface of the first lens being a convex surface; a second lens, the second lens having optical power, and the surface shapes of the first side surface of the second lens and the second side surface of the second lens are opposite; a third lens, the third lens having positive optical power, the first side surface of the third lens being a concave surface, and the second side surface of the third lens being a convex surface; a fourth lens, the fourth lens having negative optical power, the first side surface of the fourth lens being a concave surface, and the second side surface of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive optical power, and the second side surface of the fifth lens being a convex surface; a sixth lens, the sixth lens having optical power, and the first side surface of the sixth lens being a convex surface; a seventh lens, the seventh lens having optical power; and an eighth lens, the eighth lens having negative optical power, and the second side surface of the eighth lens being a concave surface.

[0007] Furthermore, the second side surface of the first lens is a concave surface.

[0008] Furthermore, the second side surface of the first lens is a convex surface.

[0009] Furthermore, the second lens has negative optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

[0010] Furthermore, the second lens has negative optical power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0011] Furthermore, the second lens has positive optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

[0012] Furthermore, the first side surface of the fifth lens is a convex surface.

[0013] Furthermore, the first side surface of the fifth lens is a concave surface.

[0014] Furthermore, the sixth lens has negative optical power, and the second side surface of the sixth lens is a concave surface.

[0015] Furthermore, the sixth lens has positive power, and the second side surface of the sixth lens is a convex surface.

[0016] Furthermore, the sixth lens has positive power, and the second side surface of the sixth lens is concave.

[0017] Furthermore, the seventh lens has positive power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a convex surface.

[0018] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface.

[0019] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a concave surface.

[0020] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

[0021] Furthermore, the first side surface of the eighth lens is a concave surface.

[0022] Furthermore, the first side surface of the eighth lens is a convex surface.

[0023] Furthermore, the optical lens also includes a stop, and the stop is located between the second lens and the third lens.

[0024] Furthermore, the third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses.

[0025] Furthermore, a radius of curvature R15 of the second side surface of the eighth lens element satisfies the relationship between the entire focal length F of the optical lens set: R15 / F≥0.3.

[0026] Furthermore, a sum d67 of a center thickness of the sixth lens and a center thickness of the seventh lens and a total length TTL of the optical lens satisfy the following relationship: d67 / TTL≤0.3.

[0027] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.3.

[0028] Furthermore, the entire focal length value F of the optical lens, 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: (FOV×F) / H≥45.

[0029] Furthermore, the total length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

[0030] Furthermore, the entire focal length value F of the optical lens, 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≤0.5.

[0031] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤F / H≤3.

[0032] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, a maximum effective light clearance diameter D of the first side surface of the first lens corresponding to the maximum field of view angle, and a maximum effective light clearance diameter D2 of the second side surface of the first lens corresponding to the maximum field of view angle satisfy: -1≤(R1 / D) / (R2 / D2)≤1.

[0033] Further, a curvature radius R9 of the first side surface of the fifth lens and a curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7.

[0034] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.05.

[0035] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0036] Furthermore, the maximum light clearance diameter D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D / H / F≤0.2.

[0037] Furthermore, a curvature radius R10 of the second side surface of the fifth lens and a maximum effective clear aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy: R10 / D9≥-7.

[0038] Furthermore, a curvature radius R10 of the second side surface of the fifth lens element satisfies the relationship between the entire focal length F of the optical lens set: R10 / F≥-3.5.

[0039] Furthermore, a radius of curvature R15 of the second side surface of the eighth lens element and a total optical length TTL of the optical lens element satisfy: R15 / TTL>0.001.

[0040] Furthermore, the optical back focus BFL of the optical lens and the entire focal length value F of the optical lens satisfy: BFL / F≤0.54.

[0041] Furthermore, a radius of curvature R15 of the second side surface of the eighth lens element and an optical back focus of the optical lens satisfy: R15 / BFL≥0.5.

[0042] According to another aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive optical power; a second lens, the second lens having optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having negative optical power; a fifth lens, the fifth lens having positive optical power; a sixth lens, the sixth lens having optical power; a seventh lens, the seventh lens having optical power; an eighth lens, the eighth lens having negative optical power; and a curvature radius R15 of a second side surface of the eighth lens satisfies the following relation with the focal length value F of the entire group of the optical lens: R15 / F≥0.3.

[0043] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

[0044] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

[0045] Furthermore, the second lens has negative optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

[0046] Furthermore, the second lens has negative optical power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0047] Furthermore, the second lens has positive optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

[0048] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface.

[0049] Furthermore, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0050] Further, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

[0051] Furthermore, the first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a convex surface.

[0052] Furthermore, the sixth lens has negative optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0053] Furthermore, the sixth lens has positive power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

[0054] Furthermore, the sixth lens has positive power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0055] Furthermore, the seventh lens has positive power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a convex surface.

[0056] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface.

[0057] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a concave surface.

[0058] Furthermore, the seventh lens has negative optical power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

[0059] Further, the first side surface of the eighth lens is a concave surface, and the second side surface of the eighth lens is a concave surface.

[0060] Furthermore, the first side surface of the eighth lens is a convex surface, and the second side surface of the eighth lens is a concave surface.

[0061] Furthermore, the optical lens also includes a stop, and the stop is located between the second lens and the third lens.

[0062] Furthermore, the third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses.

[0063] Furthermore, a sum d67 of a center thickness of the sixth lens and a center thickness of the seventh lens and a total length TTL of the optical lens satisfy the following relationship: d67 / TTL≤0.3.

[0064] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.3.

[0065] Furthermore, the entire focal length value F of the optical lens, 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: (FOV×F) / H≥45.

[0066] Furthermore, the total length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

[0067] Furthermore, the entire focal length value F of the optical lens, 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≤0.5.

[0068] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤F / H≤3.

[0069] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, a maximum effective light clearance diameter D of the first side surface of the first lens corresponding to the maximum field of view angle, and a maximum effective light clearance diameter D2 of the second side surface of the first lens corresponding to the maximum field of view angle satisfy: -1≤(R1 / D) / (R2 / D2)≤1.

[0070] Further, a curvature radius R9 of the first side surface of the fifth lens and a curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7.

[0071] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.05.

[0072] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0073] Furthermore, the maximum light clearance diameter D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: D / H / F≤0.2.

[0074] Furthermore, a curvature radius R10 of the second side surface of the fifth lens and a maximum effective clear aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy: R10 / D9≥-7.

[0075] Furthermore, a curvature radius R10 of the second side surface of the fifth lens element satisfies the relationship between the entire focal length F of the optical lens set: R10 / F≥-3.5.

[0076] Furthermore, a radius of curvature R15 of the second side surface of the eighth lens element and a total optical length TTL of the optical lens element satisfy: R15 / TTL>0.001.

[0077] Furthermore, the optical back focus BFL of the optical lens and the entire focal length value F of the optical lens satisfy: BFL / F≤0.54.

[0078] Furthermore, a radius of curvature R15 of the second side surface of the eighth lens element and an optical back focus of the optical lens satisfy: R15 / BFL≥0.5.

[0079] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0080] According to the technical solution of the present invention, the optical lens comprises 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, wherein the first lens has positive optical power, and the first side surface of the first lens is a convex surface; the second lens has optical power, and the surface shapes of the first side surface of the second lens and the second side surface of the second lens are opposite; the third lens has positive optical power, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface; the fourth lens has negative optical power, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface; the fifth lens has positive optical power, and the second side surface of the fifth lens is a convex surface; the sixth lens has optical power, and the first side surface of the sixth lens is a convex surface; the seventh lens has optical power; the eighth lens has negative optical power, and the second side surface of the eighth lens is a concave surface.

[0081] The first lens has positive focal length and converges light. The first side of the first lens is set as a convex surface, which is convenient for collecting light in a large range, so that a large amount of light enters the optical lens, which is beneficial to improving the light throughput and illumination of the optical lens. The second side of the first lens is set as a concave surface, which is beneficial to reducing the size of the first lens to meet processing requirements and reduce costs. In addition, the control of the light by the concave surface makes the light transitioning to the rear not too sensitive, which is beneficial to improving the resolution. The first lens uses a high refractive index material, which is beneficial to the front light convergence to reduce the front port diameter.

[0082] The first lens has positive focal power, and the first side surface and the second side surface of the first lens are both convex, which is conducive to making the light passing through the first lens more concentrated when it is emitted from the second side surface of the first lens, and limiting the height of the light, so as to compress the aperture of the optical lens, which is conducive to realizing a small-aperture and miniaturized design. At the same time, the first lens uses spherical glass, which can be coated with a waterproof film while reducing the processing cost.

[0083] The second lens has negative focal length, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to have negative focal length and the first side of the second lens to be convex is conducive to the smooth transition of the front light, and the second side of the second lens adopts a concave design, so that the light gathered by the first side is released to fill the entrance pupil as much as possible, thereby improving the illumination of the target surface.

[0084] The second lens has negative focal length, the first side of the second lens is concave, and the second side of the second lens is convex. The second lens is set to have negative focal length, and the first side of the second lens is designed to be concave to cooperate with the second side of the first lens which is convex, so that the light trend becomes smooth, and at the same time, the second side of the second lens is set to be convex to perfectly receive the light and reduce the sensitivity of the optical lens.

[0085] The second lens has positive focal length, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens has positive focal length and is a meniscus convex toward the first side, so that the second lens compresses the light, reduces the rear port diameter, and realizes miniaturization.

[0086] The third lens has positive focal power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens is designed to have positive focal power, and the first side surface of the third lens is concave in order to better receive the light passing through the aperture, leaving enough space for the aberration adjustment of the light of the rear optical system, and the second side surface of the third lens is designed to be convex to ensure that the third lens and the fourth lens can have a similar light trend, reduce the light energy loss caused by reflection between lenses, improve relative illumination, and reduce the field curvature correction off-axis aberration.

[0087] The fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fourth lens adopts negative optical power, and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens, and the second side surface of the fourth lens is designed to be convex to change the trend of the light. At the same time, the fourth lens serves as a negative film of the cemented part, and its material properties also play a vital role in correcting aberrations such as chromatic aberration.

[0088] The fifth lens has positive focal power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The fifth lens adopts positive focal power, and the first side surface adopts convex surface to gather the light of the front optical system and limit the diameter of the rear port. As an important lens for connecting the front lens group and the rear lens group, the fifth lens has a reduced diameter to reduce the large aberration effect caused by the light of the edge field of view, improve the sensitivity and optical performance of the optical lens, and the second side surface of the fifth lens is designed as a convex surface, so that the size of the diameter of the rear port is optimized. At the same time, the convex surface design also maintains the sensitivity of the light transmitted from the first side, which is conducive to reducing the sensitivity.

[0089] The fifth lens has positive power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. The fifth lens has positive power, and the first side surface of the fifth lens is set as a concave surface to receive the emitted upward light, so that the light trend of the fifth lens does not change significantly, so that the sensitivity of the fifth lens is optimized, and the second side surface of the fifth lens is a convex surface to change the light trend and make the light transition smoothly to the rear.

[0090] The sixth lens has negative optical power, the first side of the sixth lens is convex, and the second side of the sixth lens is concave. The sixth lens is set to have negative optical power, the first side of the sixth lens is convex to converge the front light, and the second side of the sixth lens is designed to be concave, which has a divergent effect on the light, increases the light flux, and enhances the imaging effect in a dark environment.

[0091] The sixth lens has positive focal power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens is set to have positive focal power, the first side surface of the sixth lens is designed to be convex to be symmetrical with the convex surface of the second side surface of the fourth lens, which plays a role in balancing aberrations, and the second side surface of the sixth lens is designed to be convex to further converge the light to the center and reduce the diameter of the back port.

[0092] The sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is set to have positive focal length to converge light, the first side surface of the sixth lens is set to be convex to receive the front light, and the second side surface of the sixth lens is set to be concave, which plays a transition role, so that the light entering the seventh lens moves smoothly, thereby improving the resolution of the optical lens.

[0093] The seventh lens has positive focal length, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex. By designing the seventh lens to have positive focal length and adopting a double convex structure design, it is beneficial to further converge the front light, so that the light can smoothly enter the rear optical system and achieve a small aperture.

[0094] The seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface. By designing the seventh lens to have negative optical power and designing the seventh lens to have a meniscus structure convex to the second side, the seventh lens can receive the light emitted by the sixth lens and help the light to diffuse outward, so as to expand the imaging range.

[0095] The seventh lens has negative power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is concave. By designing the seventh lens to have negative power and the seventh lens to have a biconcave structure, and matching the biconvex sixth lens, not only is there no loss of transition light, but the combination of positive and negative power is also conducive to correcting the aberration of the edge light and the center light, achieving high resolution.

[0096] The seventh lens has negative optical power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The seventh lens is set to have negative optical power, the first side surface of the seventh lens is set to be convex to gather light, and the second side surface of the seventh lens is concave to diverge light, which helps the subsequent rapid accumulation of light on the image plane and expands the imaging range.

[0097] The eighth lens has negative optical power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative optical power and the first side surface to be concave is conducive to collecting the light entering through the seventh lens, and designing the second side surface to be concave can play a certain role in regulating the aberration of peripheral light, so as to improve the resolution of the optical lens.

[0098] The eighth lens has negative optical power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative optical power can further diverge the light, designing the first side surface to be convex is conducive to receiving the incident light of the seventh lens, and designing the second side surface to be concave is conducive to increasing the light flux and improving the imaging quality of the optical lens in a dark environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0100] Figure 1 A schematic diagram of the structure of an optical lens according to Example 1 of the present invention is shown;

[0101] Figure 2 A schematic diagram of the optical lens structure of Example 2 of the present invention is shown;

[0102] Figure 3 A schematic diagram of the structure of an optical lens according to Example 3 of the present invention is shown;

[0103] Figure 4 A schematic diagram of the structure of an optical lens according to Example 4 of the present invention is shown;

[0104] Figure 5 A schematic diagram of the structure of an optical lens according to Example 5 of the present invention is shown;

[0105] Figure 6 A schematic diagram of the structure of an optical lens according to Example 6 of the present invention is shown;

[0106] Figure 7 A schematic diagram of the optical lens structure of Example 7 of the present invention is shown;

[0107] Figure 8 A schematic diagram of the structure of an optical lens according to Example 8 of the present invention is shown;

[0108] Fig. 9 A schematic diagram of the structure of an optical lens according to Example 9 of the present invention is shown;

[0109] Fig.10 A schematic diagram of the structure of an optical lens according to Example 10 of the present invention is shown;

[0110] Fig.11 A schematic diagram of the structure of an optical lens according to Example 11 of the present invention is shown;

[0111] Fig.12 A schematic diagram of the optical lens structure of Example 12 of the present invention is shown. DETAILED DESCRIPTION

[0112] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0113] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0114] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0115] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0116] In the 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 shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0117] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the first side of the lens, and the surface of each lens close to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0118] This application generally protects an ordinary optical lens. In the accompanying drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side and the second side is the image side.

[0119] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. Light from the object side can form an image on the image side.

[0120] When the optical lens in the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0121] In order to solve at least one of the problems of the optical lens in the prior art, including small light flux, inability to balance high resolution and small aperture, miniaturization limiting lens design, resulting in high sensitivity, and poor balance of aberrations, the present invention provides an optical lens and an electronic device.

[0122] Embodiment 1

[0123] like Figures 1 to 12 As shown, the optical lens comprises 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, the first lens has positive optical power, and the first side surface of the first lens is a convex surface; the second lens has optical power, and the surface shapes of the first side surface of the second lens and the second side surface of the second lens are opposite; the third lens has positive optical power, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface; the fourth lens has negative optical power, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface; the fifth lens has positive optical power, and the second side surface of the fifth lens is a convex surface; the sixth lens has optical power, and the first side surface of the sixth lens is a convex surface; the seventh lens has optical power; the eighth lens has negative optical power, and the second side surface of the eighth lens is a concave surface.

[0124] Optionally, the first lens has a positive focal length, which has a convergence effect on light. At the same time, the first side of the first lens is set as a convex surface, which is convenient for collecting light in a large range, so that a large amount of light enters the optical lens, which is beneficial to improving the light throughput and illumination of the optical lens. The second side of the first lens is set as a concave surface, which is beneficial to reducing the size of the first lens to meet processing requirements and reduce costs. In addition, the control of the light by the concave surface makes the light transitioning to the rear not too sensitive, which is beneficial to the improvement of resolution. The first lens uses a high refractive index material, which is beneficial to the front light convergence to reduce the front port diameter.

[0125] Optionally, the first lens has positive focal power, and the first side surface and the second side surface of the first lens are both convex, which is conducive to making the light passing through the first lens more convergent when it is emitted from the second side surface of the first lens, and limiting the height of the light, so as to compress the aperture of the optical lens, which is conducive to realizing a small-aperture and miniaturized design. At the same time, the first lens uses spherical glass, which can be coated with a waterproof film while reducing the processing cost.

[0126] Optionally, the second lens has negative focal length, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to have negative focal length and the first side of the second lens to be convex is conducive to the smooth transition of the front light, and the second side of the second lens adopts a concave design, so that the light gathered by the first side is released to fill the entrance pupil as much as possible, thereby improving the illumination of the target surface.

[0127] Optionally, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens is set to have negative optical power, and the first side surface of the second lens is designed to be concave to cooperate with the second side surface of the first lens which is a convex surface, so that the light trend becomes smooth, and the second side surface of the second lens is set to be convex to perfectly receive the light, thereby reducing the sensitivity of the optical lens.

[0128] Optionally, the second lens has positive focal length, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens has positive focal length and is a meniscus convex toward the first side, so that the second lens compresses the light, reduces the rear port diameter, and realizes miniaturization.

[0129] Optionally, the third lens has positive focal power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens is designed to have positive focal power, and the first side surface of the third lens is designed to be concave in order to better receive the light passing through the aperture, leaving enough space for the aberration adjustment of the light of the rear optical system, and the second side surface of the third lens is designed to be convex to ensure that the third lens and the fourth lens can have a similar light trend, reduce the light energy loss caused by reflection between lenses, improve relative illumination, and reduce the field curvature correction off-axis aberration.

[0130] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fourth lens adopts negative optical power and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens, and the second side surface of the fourth lens is designed to be convex to change the trend of the light. At the same time, the fourth lens serves as a negative film of the cemented part, and its material properties also play a crucial role in correcting aberrations such as chromatic aberration.

[0131] Optionally, the fifth lens has positive focal length, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The fifth lens adopts positive focal length, and the first side surface adopts a convex surface to gather the light of the front optical system and limit the diameter of the rear port. As an important lens for connecting the front lens group and the rear lens group, the fifth lens has a reduced diameter to reduce the large aberration effect caused by the light of the edge field of view, improve the sensitivity and optical performance of the optical lens, and the second side surface of the fifth lens is designed to be a convex surface, so that the size of the diameter of the rear port is optimized. At the same time, the convex surface design also maintains the sensitivity of the light transmitted from the first side, which is conducive to reducing the sensitivity.

[0132] Optionally, the fifth lens has positive focal power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. The fifth lens adopts positive focal power, and the first side surface of the fifth lens is set as a concave surface to receive the emitted upward light, so that the light trend of the fifth lens does not change significantly, so that the sensitivity of the fifth lens is optimized, and the second side surface of the fifth lens is a convex surface to change the light trend, so that the light smoothly transitions to the rear.

[0133] Optionally, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is set to have negative optical power, the first side surface of the sixth lens is convex to converge the front light, and the second side surface of the sixth lens is designed to be concave, which has a divergent effect on the light, increases the luminous flux, and enhances the imaging effect in a dark environment.

[0134] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens is set to have positive power, the first side surface of the sixth lens is designed to be convex to be symmetrical with the convex surface of the second side surface of the fourth lens, which plays a role in balancing aberrations, and the second side surface of the sixth lens is designed to be convex to further converge the light to the center and reduce the diameter of the back port.

[0135] Optionally, the sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is set to have positive focal length to converge light, the first side surface of the sixth lens is set to be convex to receive the front light, and the second side surface of the sixth lens is set to be concave, which plays a transition role, so that the light entering the seventh lens moves smoothly, thereby improving the resolution of the optical lens.

[0136] Optionally, the seventh lens has positive focal length, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex. By designing the seventh lens to have positive focal length and adopting a double convex structure design, it is beneficial to further converge the front light, so that the light can smoothly enter the rear optical system, and achieve a small aperture.

[0137] Optionally, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface. By designing the seventh lens to have negative optical power and designing the seventh lens to have a meniscus structure convex to the second side, the seventh lens can receive the light emitted by the sixth lens and help the light to diffuse outward, so as to expand the imaging range.

[0138] Optionally, the seventh lens has negative power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is concave. By designing the seventh lens to have negative power and the seventh lens to have a biconcave structure, in combination with the biconvex sixth lens, not only is there no loss of transition light, but the combination of positive and negative power is also conducive to correcting the aberration of the edge light and the center light, thereby achieving high resolution.

[0139] Optionally, the seventh lens has negative optical power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The seventh lens is set to have negative optical power, the first side surface of the seventh lens is set to be convex to gather light, and the second side surface of the seventh lens is concave to diverge light, which helps the subsequent rapid accumulation of light on the image plane and expands the imaging range.

[0140] Optionally, the eighth lens has negative power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative power and the first side surface to be concave is conducive to collecting the light entering through the seventh lens, and designing the second side surface to be concave can play a certain role in regulating the aberration of peripheral light, so as to improve the resolution of the optical lens.

[0141] Optionally, the eighth lens has negative optical power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative optical power can further diverge the light, designing the first side surface to be convex is conducive to receiving the incident light of the seventh lens, and designing the second side surface to be concave is conducive to increasing the light flux and improving the imaging quality of the optical lens in a dark environment.

[0142] In this embodiment, the optical lens further includes an aperture, which is located between the second lens and the third lens. The aperture is arranged between the second lens and the third lens to converge the light entering the optical lens, reduce the aperture of the optical system behind the optical lens, and reduce the assembly sensitivity of the optical lens.

[0143] In this embodiment, the third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses. The third lens and the fourth lens with opposite optical powers are set as cemented lenses, which is conducive to the smooth transition of light to the rear optical system. The sixth lens and the seventh lens are cemented lenses, which can smoothly transition the light passing through the front lens to the rear optical system, reduce the total optical length of the optical lens, fully correct various aberrations of the optical lens, and improve the resolution of the optical lens, optimize the distortion, CRA and other optical properties under the premise of compact structure.

[0144] Designing the third lens and the fourth lens, the sixth lens and the seventh lens as cemented lenses can reduce the air gap between the two lenses, reduce the total length of the optical lens, and be beneficial to the miniaturization of the optical lens. It can also reduce the assembly parts of the two lens pieces, reduce the process, and reduce the cost. The complementary dispersion of the two lenses is beneficial to reduce chromatic aberration, and can further reduce field curvature, correct the off-axis point aberration of the optical lens, and improve the imaging quality. Reasonable distribution of focal length is conducive to achieving thermal compensation and obtaining good temperature performance.

[0145] In this embodiment, the curvature radius R15 of the second side surface of the eighth lens satisfies the following relationship with the focal length value F of the entire optical lens group: R15 / F≥0.3. When the focal length value F of the entire optical lens group is fixed, the curvature radius of the second side surface of the eighth lens is guaranteed to be positive, which can effectively adjust the rear light, balance the aberration, and improve the resolution of the optical lens. Preferably, R15 / F≥0.5.

[0146] In this embodiment, the sum of the center thickness of the sixth lens and the center thickness of the seventh lens d67 and the total length TTL of the optical lens satisfy: d67 / TTL≤0.3. When TTL is similar, the smaller the sum of the center thickness of the sixth lens and the seventh lens is, the greater the restriction on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture. At the same time, the restriction on the center thickness of the cemented lens also plays an important role in controlling low cost. Preferably, d67 / TTL≤0.26.

[0147] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.3. When the field angle is constant, the smaller the maximum light aperture of the first side surface of the first lens, the more conducive it is to reduce the front diameter of the optical lens and reduce the volume of the optical lens. Preferably, (F*θ) / D≥0.5.

[0148] In this embodiment, the focal length value F of the entire optical lens, 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: (FOV×F) / H≥45. This arrangement is conducive to achieving a long-focus large-angle resolution when the image height is the same. Preferably, (FOV×F) / H≥50.

[0149] In this embodiment, the total length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤3. When the focal length is close, the smaller the TTL means that the optical lens has a smaller volume, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤2.5.

[0150] In this embodiment, the focal length value F of the entire optical lens, 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≤0.5. Under the same imaging plane and the same image height, the length of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. TTL / H / FOV≤0.3.

[0151] In this embodiment, the whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤F / H≤3. Controlling the ratio of the whole set focal length value of the optical lens to the image height within a reasonable range is conducive to improving the resolution of the optical lens. Preferably, 1≤F / H≤2.5.

[0152] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy: -1≤(R1 / D) / (R2 / D2)≤1. By limiting the curvature of the first lens and the maximum effective aperture, the above relationship is ensured to be within a certain range, which can effectively limit the height of the edge light entering the optical lens, and further achieve a small aperture. Preferably, -0.5≤(R1 / D) / (R2 / D2)≤0.7.

[0153] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7. Controlling the curvature radius of the fifth lens within a reasonable range can reduce the deviation of the incident angle of light in different fields of view, which is conducive to the smooth transition of light, thereby reducing the sensitivity of the optical lens. Preferably, -4≤R9 / R10≤6.5.

[0154] In this embodiment, the whole set focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.05. It is ensured that the focal length of the optical lens is increased, the imaging effect of the central area of ​​the imaging surface of the optical lens is highlighted, and the influence of target surface distortion is reduced when the field angle and the imaging surface size of the optical lens remain unchanged. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0155] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. This setting is conducive to increasing the entrance pupil diameter, increasing the amount of light passing, helping to improve relative illumination, and improving imaging capabilities in dark environments. Preferably, F / ENPD≤1.8.

[0156] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D / H / F≤0.2. Under the condition that the entire focal length value of the optical lens is fixed, the optical lens has the characteristics of a large target surface and a small aperture. Preferably, D / H / F≤0.15.

[0157] In this embodiment, the curvature radius R10 of the second side surface of the fifth lens and the maximum effective aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy: R10 / D9≥-7. Reasonable setting of the ratio of the curvature radius of the fifth lens to the maximum effective aperture is conducive to reducing the height of the light entering the fifth lens, achieving a small aperture, and taking into account the processability of the lens. Preferably, R10 / D9≥-4.

[0158] In this embodiment, the curvature radius R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens group: R10 / F≥-3.5. When the focal length is fixed, controlling the curvature radius of the second side surface of the fifth lens can effectively reduce the height of the optical front and reduce the aperture of the rear optical system. Preferably, R10 / F≥-2.5.

[0159] In this embodiment, the curvature radius R15 of the second side surface of the eighth lens satisfies the total optical length TTL of the optical lens: R15 / TTL>0.001. When the total optical length remains unchanged, controlling the curvature radius of the second side surface of the eighth lens can reduce the reflection ghost image generated between the eighth lens and the filter and the protective glass, and improve the imaging quality. Preferably, R15 / TTL≥0.2.

[0160] In this embodiment, the optical back focus BFL of the optical lens and the focal length F of the entire optical lens group satisfy: BFL / F≤0.54. By limiting the ratio of BFL to F, the optical path difference between the peripheral light and the central light is reduced by limiting the back focus length on the basis of miniaturization, thereby reducing aberrations and improving resolution. Preferably, BFL / F≤0.41.

[0161] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the optical back focus of the optical lens: R15 / BFL≥0.5. Reflection ghost images are easily generated between the second side surface of the eighth lens and the filter and the protective glass. Controlling the second side surface of the eighth lens to be a concave surface can effectively reduce or even avoid ghost images, and by controlling the optical back focus, the resolution of the optical lens can be significantly improved. Preferably, R15 / BFL≥2.

[0162] Embodiment 2

[0163] like Figures 1 to 12 As shown, the optical lens includes 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, the first lens has positive focal power; the second lens has focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has focal power; the seventh lens has focal power; the eighth lens has negative focal power; the radius of curvature R15 of the second side surface of the eighth lens satisfies the whole group focal length value F of the optical lens: R15 / F≥0.3. When the whole group focal length value F of the optical lens is fixed, the radius of curvature of the second side surface of the eighth lens is guaranteed to be positive, which can effectively adjust the rear light, balance the aberration, and improve the resolution of the optical lens. Preferably, R15 / F≥0.5.

[0164] Optionally, the first lens has a positive focal length, which has a convergence effect on light. At the same time, the first side of the first lens is set as a convex surface, which is convenient for collecting light in a large range, so that a large amount of light enters the optical lens, which is beneficial to improving the light throughput and illumination of the optical lens. The second side of the first lens is set as a concave surface, which is beneficial to reducing the size of the first lens to meet processing requirements and reduce costs. In addition, the control of the light by the concave surface makes the light transitioning to the rear not too sensitive, which is beneficial to the improvement of resolution. The first lens uses a high refractive index material, which is beneficial to the front light convergence to reduce the front port diameter.

[0165] Optionally, the first lens has positive focal power, and the first side surface and the second side surface of the first lens are both convex, which is conducive to making the light passing through the first lens more convergent when it is emitted from the second side surface of the first lens, and limiting the height of the light, so as to compress the aperture of the optical lens, which is conducive to realizing a small-aperture and miniaturized design. At the same time, the first lens uses spherical glass, which can be coated with a waterproof film while reducing the processing cost.

[0166] Optionally, the second lens has negative focal length, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to have negative focal length and the first side of the second lens to be convex is conducive to the smooth transition of the front light, and the second side of the second lens adopts a concave design, so that the light gathered by the first side is released to fill the entrance pupil as much as possible, thereby improving the illumination of the target surface.

[0167] Optionally, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens is set to have negative optical power, and the first side surface of the second lens is designed to be concave to cooperate with the second side surface of the first lens which is a convex surface, so that the light trend becomes smooth, and the second side surface of the second lens is set to be convex to perfectly receive the light, thereby reducing the sensitivity of the optical lens.

[0168] Optionally, the second lens has positive focal length, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens has positive focal length and is a meniscus convex toward the first side, so that the second lens compresses the light, reduces the rear port diameter, and realizes miniaturization.

[0169] Optionally, the third lens has positive focal power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens is designed to have positive focal power, and the first side surface of the third lens is designed to be concave in order to better receive the light passing through the aperture, leaving enough space for the aberration adjustment of the light of the rear optical system, and the second side surface of the third lens is designed to be convex to ensure that the third lens and the fourth lens can have a similar light trend, reduce the light energy loss caused by reflection between lenses, improve relative illumination, and reduce the field curvature correction off-axis aberration.

[0170] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fourth lens adopts negative optical power and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens, and the second side surface of the fourth lens is designed to be convex to change the trend of the light. At the same time, the fourth lens serves as a negative film of the cemented part, and its material properties also play a crucial role in correcting aberrations such as chromatic aberration.

[0171] Optionally, the fifth lens has positive focal length, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The fifth lens adopts positive focal length, and the first side surface adopts a convex surface to gather the light of the front optical system and limit the diameter of the rear port. As an important lens for connecting the front lens group and the rear lens group, the fifth lens has a reduced diameter to reduce the large aberration effect caused by the light of the edge field of view, improve the sensitivity and optical performance of the optical lens, and the second side surface of the fifth lens is designed to be a convex surface, so that the size of the diameter of the rear port is optimized. At the same time, the convex surface design also maintains the sensitivity of the light transmitted from the first side, which is conducive to reducing the sensitivity.

[0172] Optionally, the fifth lens has positive focal power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. The fifth lens adopts positive focal power, and the first side surface of the fifth lens is set as a concave surface to receive the emitted upward light, so that the light trend of the fifth lens does not change significantly, so that the sensitivity of the fifth lens is optimized, and the second side surface of the fifth lens is a convex surface to change the light trend, so that the light smoothly transitions to the rear.

[0173] Optionally, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is set to have negative optical power, the first side surface of the sixth lens is convex to converge the front light, and the second side surface of the sixth lens is designed to be concave, which has a divergent effect on the light, increases the luminous flux, and enhances the imaging effect in a dark environment.

[0174] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens is set to have positive power, the first side surface of the sixth lens is designed to be convex to be symmetrical with the convex surface of the second side surface of the fourth lens, which plays a role in balancing aberrations, and the second side surface of the sixth lens is designed to be convex to further converge the light to the center and reduce the diameter of the back port.

[0175] Optionally, the sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is set to have positive focal length to converge light, the first side surface of the sixth lens is set to be convex to receive the front light, and the second side surface of the sixth lens is set to be concave, which plays a transition role, so that the light entering the seventh lens moves smoothly, thereby improving the resolution of the optical lens.

[0176] Optionally, the seventh lens has positive focal length, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex. By designing the seventh lens to have positive focal length and adopting a double convex structure design, it is beneficial to further converge the front light, so that the light can smoothly enter the rear optical system, and achieve a small aperture.

[0177] Optionally, the seventh lens has negative optical power, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface. By designing the seventh lens to have negative optical power and designing the seventh lens to have a meniscus structure convex to the second side, the seventh lens can receive the light emitted by the sixth lens and help the light to diffuse outward, so as to expand the imaging range.

[0178] Optionally, the seventh lens has negative power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is concave. By designing the seventh lens to have negative power and the seventh lens to have a biconcave structure, in combination with the biconvex sixth lens, not only is there no loss of transition light, but the combination of positive and negative power is also conducive to correcting the aberration of the edge light and the center light, thereby achieving high resolution.

[0179] Optionally, the seventh lens has negative optical power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The seventh lens is set to have negative optical power, the first side surface of the seventh lens is set to be convex to gather light, and the second side surface of the seventh lens is concave to diverge light, which helps the subsequent rapid accumulation of light on the image plane and expands the imaging range.

[0180] Optionally, the eighth lens has negative power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative power and the first side surface to be concave is conducive to collecting the light entering through the seventh lens, and designing the second side surface to be concave can play a certain role in regulating the aberration of peripheral light, so as to improve the resolution of the optical lens.

[0181] Optionally, the eighth lens has negative optical power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave. Designing the eighth lens to have negative optical power can further diverge the light, designing the first side surface to be convex is conducive to receiving the incident light of the seventh lens, and designing the second side surface to be concave is conducive to increasing the light flux and improving the imaging quality of the optical lens in a dark environment.

[0182] In this embodiment, the optical lens further includes an aperture, which is located between the second lens and the third lens. The aperture is arranged between the second lens and the third lens to converge the light entering the optical lens, reduce the aperture of the optical system behind the optical lens, and reduce the assembly sensitivity of the optical lens.

[0183] In this embodiment, the third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses. The third lens and the fourth lens with opposite optical powers are set as cemented lenses, which is conducive to the smooth transition of light to the rear optical system. The sixth lens and the seventh lens are cemented lenses, which can smoothly transition the light passing through the front lens to the rear optical system, reduce the total optical length of the optical lens, fully correct various aberrations of the optical lens, and improve the resolution of the optical lens, optimize the distortion, CRA and other optical properties under the premise of compact structure.

[0184] Designing the third lens and the fourth lens, the sixth lens and the seventh lens as cemented lenses can reduce the air gap between the two lenses, reduce the total length of the optical lens, and be beneficial to the miniaturization of the optical lens. It can also reduce the assembly parts of the two lens pieces, reduce the process, and reduce the cost. The complementary dispersion of the two lenses is beneficial to reduce chromatic aberration, and can further reduce field curvature, correct the off-axis point aberration of the optical lens, and improve the imaging quality. Reasonable distribution of focal length is conducive to achieving thermal compensation and obtaining good temperature performance.

[0185] In this embodiment, the sum of the center thickness of the sixth lens and the center thickness of the seventh lens d67 and the total length TTL of the optical lens satisfy: d67 / TTL≤0.3. When TTL is similar, the smaller the sum of the center thickness of the sixth lens and the seventh lens is, the greater the restriction on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture. At the same time, the restriction on the center thickness of the cemented lens also plays an important role in controlling low cost. Preferably, d67 / TTL≤0.26.

[0186] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.3. When the field angle is constant, the smaller the maximum light aperture of the first side surface of the first lens, the more conducive it is to reduce the front diameter of the optical lens and reduce the volume of the optical lens. Preferably, (F*θ) / D≥0.5.

[0187] In this embodiment, the focal length value F of the entire optical lens, 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: (FOV×F) / H≥45. This arrangement is conducive to achieving a long-focus large-angle resolution when the image height is the same. Preferably, (FOV×F) / H≥50.

[0188] In this embodiment, the total length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤3. When the focal length is close, the smaller the TTL means that the optical lens has a smaller volume, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤2.5.

[0189] In this embodiment, the focal length value F of the entire optical lens, 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≤0.5. Under the same imaging plane and the same image height, the length of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. TTL / H / FOV≤0.3.

[0190] In this embodiment, the whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤F / H≤3. Controlling the ratio of the whole set focal length value of the optical lens to the image height within a reasonable range is conducive to improving the resolution of the optical lens. Preferably, 1≤F / H≤2.5.

[0191] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy: -1≤(R1 / D) / (R2 / D2)≤1. By limiting the curvature of the first lens and the maximum effective aperture, the above relationship is ensured to be within a certain range, which can effectively limit the height of the edge light entering the optical lens, and further achieve a small aperture. Preferably, -0.5≤(R1 / D) / (R2 / D2)≤0.7.

[0192] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7. Controlling the curvature radius of the fifth lens within a reasonable range can reduce the deviation of the incident angle of light in different fields of view, which is conducive to the smooth transition of light, thereby reducing the sensitivity of the optical lens. Preferably, -4≤R9 / R10≤6.5.

[0193] In this embodiment, the whole set focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.05. It is ensured that the focal length of the optical lens is increased, the imaging effect of the central area of ​​the imaging surface of the optical lens is highlighted, and the influence of target surface distortion is reduced when the field angle and the imaging surface size of the optical lens remain unchanged. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0194] In this embodiment, the whole set focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Under the condition that the whole set focal length value of the optical lens is fixed, the optical lens has the characteristics of large target surface and small aperture. Preferably, D / H / F≤0.15.

[0195] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: D / H / F≤0.2. Under the condition that the entire focal length value of the optical lens is fixed, the optical lens has the characteristics of a large target surface and a small aperture. Preferably, D / H / F≤0.15.

[0196] In this embodiment, the curvature radius R10 of the second side surface of the fifth lens and the maximum effective aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy: R10 / D9≥-7. Reasonable setting of the ratio of the curvature radius of the fifth lens to the maximum effective aperture is conducive to reducing the height of the light entering the fifth lens, achieving a small aperture, and taking into account the processability of the lens. Preferably, R10 / D9≥-4.

[0197] In this embodiment, the curvature radius R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens group: R10 / F≥-3.5. When the focal length is fixed, controlling the curvature radius of the second side surface of the fifth lens can effectively reduce the height of the optical front and reduce the aperture of the rear optical system. Preferably, R10 / F≥-2.5.

[0198] In this embodiment, the curvature radius R15 of the second side surface of the eighth lens satisfies the total optical length TTL of the optical lens: R15 / TTL>0.001. When the total optical length remains unchanged, controlling the curvature radius of the second side surface of the eighth lens can reduce the reflection ghost image generated between the eighth lens and the filter and the protective glass, and improve the imaging quality. Preferably, R15 / TTL≥0.2.

[0199] In this embodiment, the optical back focus BFL of the optical lens and the focal length F of the entire optical lens group satisfy: BFL / F≤0.54. By limiting the ratio of BFL to F, the optical path difference between the peripheral light and the central light is reduced by limiting the back focus length on the basis of miniaturization, thereby reducing aberrations and improving resolution. Preferably, BFL / F≤0.41.

[0200] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the optical back focus of the optical lens: R15 / BFL≥0.5. Reflection ghost images are easily generated between the second side surface of the eighth lens and the filter and the protective glass. Controlling the second side surface of the eighth lens to be a concave surface can effectively reduce or even avoid ghost images, and by controlling the optical back focus, the resolution of the optical lens can be significantly improved. Preferably, R15 / BFL≥2.

[0201] Optionally, the optical lens may further include a filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0202] In the above optical lens, the maximum field of view FOV of the optical lens is associated with H, and the field of view corresponding to the image height is used. The total optical length TTL of the optical lens refers to the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis.

[0203] The optical lens in the present application may use multiple lenses, such as the eight lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the eighth lens can all use aspherical lenses.

[0204] In an exemplary embodiment, the first lens to the eighth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, an optical lens with an all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C.

[0205] Specifically, when focusing on resolution quality and reliability, the first to eighth lenses can all be glass aspheric lenses. Of course, in applications where temperature stability requirements are low, the first to eighth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first to eighth lenses in the optical lens can also be made of a combination of plastic and glass.

[0206] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0207] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to including eight lenses. If necessary, the optical lens may also include other numbers of lenses.

[0208] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0209] Example 1

[0210] like Figure 1 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0211] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0212] In this example, the focal length F of the optical lens is 15.3688 mm, the total length TTL of the optical lens is 32.5552 mm, and the maximum field of view FOV of the optical lens is 34.3857°.

[0213] In this example, the third lens and the fourth lens are cemented lenses, so the second side surface of the third lens and the first side surface of the fourth lens are both S7, and the sixth lens and the seventh lens are cemented lenses, so the second side surface of the sixth lens and the first side surface of the seventh lens are both S12, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different, so the second side surface S7 of the third lens is convex, and the first side surface S7 of the fourth lens is concave; the second side surface S12 of the sixth lens is convex, and the first side surface S12 of the seventh lens is concave.

[0214] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0215] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0216]

[0217]

[0218] Table 1

[0219] Example 2

[0220] like Figure 2 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0221] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0222] In this example, the focal length F of the optical lens is 15.6134 mm, the total length TTL of the optical lens is 32.9843 mm, and the maximum field of view FOV of the optical lens is 34.2065°.

[0223] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0224] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0225] Table 2 shows the basic structural parameters of the optical lens of Example 2, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0226]

[0227]

[0228] Table 2

[0229] Example 3

[0230] like Figure 3 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0231] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0232] In this example, the focal length F of the optical lens is 15.4469 mm, the total length TTL of the optical lens is 32.4494 mm, and the maximum field of view FOV of the optical lens is 34.4283°.

[0233] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0234] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0235] Table 3 shows the basic structural parameters of the optical lens of Example 3, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0236] Surf Radius Thickness Nd Vd 1 12.5000 2.6000 1.80 46.57 2 25.7000 0.1000 3 7.6000 1.2000 1.85 23.78 4 5.9000 1.5000 STO Infinity 2.0000 6 -10.9000 4.3000 1.69 54.82 7 -6.1000 1.6000 1.91 35.25 8 -13.0550 0.1000 9 16.0000 4.3000 1.57 71.30 10 -18.0000 0.8000 11 30.0000 3.2500 1.69 31.16 12 9.1000 4.9000 1.70 55.53 13 -30.0000 1.2000 14 -9.5000 0.9000 1.49 70.44 15 18.6000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.6744 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0237] Table 3

[0238] Example 4

[0239] like Figure 4 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0240] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0241] In this example, the focal length F of the optical lens is 15.4545 mm, the total length TTL of the optical lens is 32.3781 mm, and the maximum field of view FOV of the optical lens is 34.4446°.

[0242] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0243] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0244] Table 4 shows the basic structural parameters of the optical lens of Example 4, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0245] Surf Radius Thickness Nd Vd 1 12.6000 2.6000 1.80 46.57 2 24.7000 0.1000 3 7.6000 1.1000 1.85 23.78 4 6.0000 1.5000 STO Infinity 1.8000 6 -11.6000 4.3000 1.69 54.82 7 -6.3000 2.0000 1.91 35.25 8 -13.6560 0.1000 9 14.6000 4.2000 1.57 71.30 10 -21.7000 0.8000 11 32.9000 2.5000 1.69 31.16 12 9.3000 5.0000 1.70 55.53 13 -33.2000 1.7500 14 -9.0000 0.9000 1.49 70.44 15 23.9000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.7031 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0246] Table 4

[0247] Example 5

[0248] like Figure 5 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0249] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0250] In this example, the focal length F of the optical lens is 15.3972 mm, the total length TTL of the optical lens is 32.5937 mm, and the maximum field of view FOV of the optical lens is 34.3828°.

[0251] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0252] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0253] Table 5 shows the basic structural parameters of the optical lens of Example 5, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0254] Surf Radius Thickness Nd Vd 1 23.0000 2.7000 1.80 46.57 2 -63.0000 1.3000 3 -23.0000 1.5000 1.85 23.78 4 -43.0000 0.1000 STO Infinity 3.0000 6 -15.7000 4.6000 1.69 54.82 7 -7.5000 2.5000 1.91 35.25 8 -13.5220 2.4300 9 25.0000 3.7000 1.57 71.30 10 -25.0000 0.1000 11 13.8000 3.0000 1.70 55.53 12 -15.4000 1.8000 1.69 31.16 13 23.0000 1.1000 14 -18.0000 0.9000 1.49 70.44 15 11.7000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8387 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0255] Table 5

[0256] Example 6

[0257] like Figure 6 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0258] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0259] In this example, the focal length F of the optical lens is 15.3928 mm, the total length TTL of the optical lens is 32.4082 mm, and the maximum field of view FOV of the optical lens is 34.3825°.

[0260] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0261] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0262] Table 6 shows the basic structural parameters of the optical lens of Example 6, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0263] Surf Radius Thickness Nd Vd 1 23.0000 2.7000 1.80 46.57 2 -63.0000 1.3000 3 -23.0000 1.5000 1.85 23.78 4 -43.0000 0.1000 STO Infinity 3.0000 6 -15.6000 4.5000 1.69 54.82 7 -7.5000 2.5000 1.91 35.25 8 -13.4550 2.4000 9 25.0000 3.6000 1.57 71.30 10 -25.3000 0.1000 11 13.8000 3.0000 1.70 55.53 12 -15.2000 1.8000 1.69 31.16 13 23.0000 1.1000 14 -18.0000 0.9000 1.49 70.44 15 11.8000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8832 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0264] Table 6

[0265] Example 7

[0266] like Figure 7As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0267] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0268] In this example, the focal length F of the optical lens is 15.6091 mm, the total length TTL of the optical lens is 32.6947 mm, and the maximum field of view FOV of the optical lens is 34.504°.

[0269] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0270] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0271] Table 7 shows the basic structural parameters of the optical lens of Example 7, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0272]

[0273]

[0274] Table 7

[0275] Example 8

[0276] like Figure 8 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0277] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0278] In this example, the focal length F of the optical lens is 15.5795 mm, the total length TTL of the optical lens is 32.6957 mm, and the maximum field of view FOV of the optical lens is 34.5281°.

[0279] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0280] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0281] Table 8 shows the basic structural parameters of the optical lens of Example 8, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0282]

[0283]

[0284] Table 8

[0285] Example 9

[0286] like Fig. 9 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0287] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is convex, and the second side surface S15 of the eighth lens is concave. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0288] In this example, the focal length F of the optical lens is 15.8227 mm, the total length TTL of the optical lens is 32.4859 mm, and the maximum field of view FOV of the optical lens is 34.7606°.

[0289] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0290] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0291] Table 9 shows the basic structural parameters of the optical lens of Example 9, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0292]

[0293]

[0294] Table 9

[0295] Example 10

[0296] like Fig.10 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0297] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is convex, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is convex, and the second side surface S15 of the eighth lens is concave. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0298] In this example, the focal length F of the optical lens is 15.7761 mm, the total length TTL of the optical lens is 32.4613 mm, and the maximum field of view FOV of the optical lens is 34.7494°.

[0299] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0300] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0301] Table 10 shows the basic structural parameters of the optical lens of Example 10, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0302] Surf Radius Thickness Nd Vd 1 11.8000 3.0000 1.80 46.57 2 25.6000 0.1000 3 7.5000 2.8000 1.85 23.78 4 4.5000 1.4000 STO Infinity 1.5000 6 -12.2000 2.9000 1.69 54.82 7 -4.1000 0.9000 1.91 35.25 8 -12.5370 0.3000 9 -41.5000 4.3000 1.57 71.30 10 -7.7000 1.3000 11 13.2000 3.4000 1.70 55.53 12 95.0000 5.0000 1.69 31.16 13 33.0000 0.8000 14 50.0000 0.9000 1.49 70.44 15 15.2000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8363 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0303] Table 10

[0304] Example 11

[0305] like Fig.11 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0306] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0307] In this example, the focal length F of the optical lens is 15.4241 mm, the total length TTL of the optical lens is 32.5177 mm, and the maximum field of view FOV of the optical lens is 34.4236°.

[0308] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0309] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0310] Table 11 shows the basic structural parameters of the optical lens of Example 11, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0311] Surf Radius Thickness Nd Vd 1 21.6000 2.3000 1.80 46.57 2 87.0000 0.1000 3 30.7000 1.5000 1.85 23.78 4 36.0000 0.4000 STO Infinity 2.2000 6 -11.3000 3.0000 1.69 54.82 7 -7.2000 4.0000 1.91 35.25 8 -12.8270 0.1000 9 26.0000 3.5000 1.57 71.30 10 -30.0000 0.1000 11 23.0000 3.2000 1.70 55.53 12 -10.0000 5.0000 1.69 31.16 13 54.0000 1.0000 14 -13.0000 2.3000 1.49 70.44 15 33.0000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.7927 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0312] Table 11

[0313] Example 12

[0314] like Fig.12 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass and an imaging surface IMA.

[0315] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is concave, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S12 of the seventh lens is concave, and the second side surface S13 of the seventh lens is concave. The eighth lens L8 has negative power, the first side surface S14 of the eighth lens is a concave surface, and the second side surface S15 of the eighth lens is a concave surface. The filter has a first side surface S16 of the filter and a second side surface S17 of the filter, and the protective glass has a first side surface S18 of the protective glass and a second side surface S19 of the protective glass. Light from the object passes through the surfaces S1 to S19 in sequence and is finally imaged on the imaging surface IMA.

[0316] In this example, the focal length F of the optical lens is 15.4144 mm, the total length TTL of the optical lens is 32.5676 mm, and the maximum field of view FOV of the optical lens is 34.4262°.

[0317] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0318] It should be noted that, in the curvature radius Ri of each lens, i refers to the surface number of the lens surface.

[0319] Table 12 shows the basic structural parameters of the optical lens of Example 12, wherein the units of the radius of curvature Radius and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0320] Surf Radius Thickness Nd Vd 1 21.2000 2.3000 1.80 46.57 2 91.0000 0.1000 3 37.0000 1.5000 1.85 23.78 4 44.0000 0.3000 STO Infinity 2.2000 6 -11.0000 3.3000 1.69 54.82 7 -7.2000 3.7000 1.91 35.25 8 -12.3720 0.3000 9 26.0000 3.5000 1.57 71.30 10 -33.0000 0.1000 11 23.0000 3.2000 1.70 55.53 12 -10.0000 5.0000 1.69 31.16 13 52.0000 1.0000 14 -13.6000 2.2000 1.49 70.44 15 31.4000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8426 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0321] Table 12

[0322] In summary, Examples 1 to 12 satisfy the relationship shown in Table 13.

[0323]

[0324]

[0325] Table 13

[0326] Table 14 gives the focal length value F (unit: mm) of the entire set of optical lenses of Examples 1 to 12.

[0327]

[0328]

[0329] Table 14

[0330] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0331] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0332] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0333] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: include: A first lens, wherein the first lens has positive optical power, and a first side surface of the first lens is a convex surface; a second lens, the second lens having optical power, the first side surface of the second lens and the second side surface of the second lens having opposite surface shapes; A third lens, the third lens has positive optical power, a first side surface of the third lens is a concave surface, and a second side surface of the third lens is a convex surface; a fourth lens having negative optical power, a first side surface of the fourth lens being a concave surface, and a second side surface of the fourth lens being a convex surface; a fifth lens having positive optical power, wherein the second side surface of the fifth lens is a convex surface; a sixth lens, the sixth lens having optical power, and a first side surface of the sixth lens being a convex surface; a seventh lens having optical power; An eighth lens has negative optical power, and a second side surface of the eighth lens is a concave surface.

2. The optical lens according to claim 1, characterized in that: The curvature radius R15 of the second side surface of the eighth lens satisfies the following relationship with the focal length F of the entire optical lens group: R15 / F≥0.

3.

3. The optical lens according to claim 1, characterized in that: The sum d67 of the center thickness of the sixth lens and the center thickness of the seventh lens and the total length TTL of the optical lens satisfy the following relationship: d67 / TTL≤0.

3.

4. The optical lens according to claim 1, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the optical lens at the maximum field angle satisfy the following: (F*θ) / D≥0.

3.

5. The optical lens according to claim 1, characterized in that: The entire focal length value F of the optical lens, 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 the following: (FOV×F) / H≥45.

6. The optical lens according to claim 1, characterized in that: The total length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

7. The optical lens according to claim 1, characterized in that: The entire focal length value F of the optical lens, 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 the following: TTL / H / FOV≤0.

5.

8. The optical lens according to claim 1, characterized in that: The whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 0.5≤F / H≤3.

9. An optical lens, characterized in that: include: a first lens having positive optical power; a second lens having optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive refractive power; a sixth lens having optical power; a seventh lens having optical power; an eighth lens having negative optical power; The curvature radius R15 of the second side surface of the eighth lens satisfies the following relationship with the focal length F of the entire optical lens group: R15 / F≥0.

3.

10. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images