Optical lens and electronic equipment with same

Abstract

The invention provides an optical lens and electronic equipment with the same, and the optical lens comprises a first lens which has negative focal power, 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; the second lens has negative focal 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; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has positive focal power, and the first side surface and the second side surface of the fifth lens are convex surfaces; a sixth lens, wherein the sixth lens has negative focal power; a seventh lens, wherein the seventh lens has positive focal power; and the eighth lens has focal power, 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. According to the invention, at least one of the problems of difficulty in miniaturization, small field angle, poor imaging quality in a dark environment, poor temperature performance, serious aberration and poor light transmission capability of an optical lens in the prior art is 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 having the same. Background Art

[0002] With the development of science and technology and the increase in application needs, optical lenses have been widely used in many devices, especially in vehicle-mounted applications, and users' demand for optical lenses is also increasing. As optical lenses are used in more and more places, they often need to have a concealed effect. However, existing optical lenses usually have a large front diameter and a large volume, which makes it difficult to adapt to a smaller installation space. At the same time, the small field of view makes it difficult to meet the requirements of large-scale monitoring of the surrounding environment. In addition, the existing optical lenses have low light transmission capabilities and poor imaging in darker environments such as at night or on rainy days. In addition, when faced with high temperatures in summer and low temperatures in winter, the temperature performance of existing optical lenses is poor. After returning from high temperature to normal temperature, there are problems such as unclear images. In addition, the aberration problems such as distortion of existing optical lenses are still relatively serious and cannot meet user needs.

[0003] That is to say, the optical lens in the prior art has at least one of the following problems: difficulty in miniaturization, small field of view, poor imaging quality in dark environments, poor temperature performance, severe aberrations, and weak light transmission capability. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the problems in the prior art that the optical lens is difficult to miniaturize, has a small field of view, has poor imaging quality in a dark environment, has poor temperature performance, has severe aberrations, and has low light transmission capacity.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having negative optical power, a first side surface of the first lens being a convex surface, and a second side surface of the first lens being a concave surface; a second lens, the second lens having negative optical power, a first side surface of the second lens being a concave surface, and a second side surface of the second lens being a convex surface; a third lens, the third lens having positive optical power, and a first side surface of the third lens being a convex surface; a fourth lens, the fourth lens having positive optical power, and a first side surface of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive optical power, and a first side surface of the fifth lens and a second side surface of the fifth lens are both convex surfaces; a sixth lens, the sixth lens having negative optical power, and a second side surface of the sixth lens being a concave surface; a seventh lens, the seventh lens having positive optical power, and a first side surface of the seventh lens being a convex surface; and an eighth lens, the eighth lens having optical power, a first side surface of the eighth lens being a convex surface, and a second side surface of the eighth lens being a concave surface.

[0006] Furthermore, the second side surface of the third lens is a concave surface.

[0007] Furthermore, the second side surface of the third lens is a convex surface.

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

[0009] Furthermore, the second side surface of the fourth lens is a concave surface.

[0010] Furthermore, the first side surface of the sixth lens is a concave surface.

[0011] Furthermore, the first side surface of the sixth lens is a convex surface.

[0012] Furthermore, the second side surface of the seventh lens is a convex surface.

[0013] Furthermore, the second side surface of the seventh lens is a concave surface.

[0014] Furthermore, the eighth lens has positive refractive power.

[0015] Furthermore, the eighth lens has negative refractive power.

[0016] Furthermore, both the second lens and the eighth lens are aspherical lenses.

[0017] Further, the sixth lens and the seventh lens are cemented to form a cemented lens.

[0018] Further, the fifth lens, the sixth lens and the seventh lens are cemented to form a cemented lens.

[0019] Furthermore, the second side surface of the eighth lens has an inflection point.

[0020] Further, the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0021] Furthermore, the optical lens also includes a stop, and the stop is located between the third lens and the fourth lens.

[0022] Furthermore, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤12.

[0023] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.07.

[0024] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: TTL / H / θ≤3.5.

[0025] Furthermore, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤2.

[0026] Furthermore, the maximum light aperture D of the first side surface of the first lens corresponding to the maximum light aperture of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.04.

[0027] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤1.9.

[0028] Furthermore, the total optical length TTL of the optical lens, the entire focal length value F of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.8≤TTL / (F*θ)≤7.

[0029] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: 200≤(FOV*H) / F.

[0030] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 2.2≤(θ*H) / F.

[0031] Furthermore, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥0.001.

[0032] Furthermore, a radius of curvature R4 of the second side surface of the second lens and a focal length value F of the entire optical lens group satisfy: R4 / F≤-0.001.

[0033] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-10.

[0034] Furthermore, a radius of curvature R7 of the first side surface of the fourth lens and a focal length F of the entire optical lens group satisfy: 0.5≤R7 / F≤8.

[0035] Furthermore, a curvature radius R9 of the first side surface of the fifth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: 0.1≤R9 / R12.

[0036] Furthermore, a radius of curvature R15 of the first side surface of the eighth lens and a focal length F of the entire optical lens group satisfy: 1.5≤R15 / F.

[0037] Further, the sixth lens and the seventh lens are cemented to form a cemented lens, and the focal length value F67 of the cemented lens and the focal length value F of the entire group of optical lenses satisfy: -20≤F67 / F≤20.

[0038] Furthermore, a radius of curvature R7 of the first side surface of the fourth lens and a total optical length TTL of the optical lens satisfy: 0.1≤R7 / TTL.

[0039] Furthermore, a radius of curvature R9 of the first side surface of the fifth lens and a total optical length TTL of the optical lens satisfy: 0.08≤R9 / TTL.

[0040] Furthermore, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: 0.3≤R3 / R4≤3.

[0041] Furthermore, a curvature radius R5 of the first side surface of the third lens and a curvature radius R6 of the second side surface of the third lens satisfy: -1.5≤R5 / R6≤1.5.

[0042] According to another aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having negative optical power; a second lens, the second lens having negative optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having positive optical power; a fifth lens, the fifth lens having positive optical power; a sixth lens, the sixth lens having negative optical power; a seventh lens, the seventh lens having positive optical power; and an eighth lens, the eighth lens having optical power; wherein the focal length value F3 of the third lens and the focal length value F of the entire group of the optical lens satisfy the following condition: F3 / F≥0.001.

[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 second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0045] Furthermore, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a concave surface.

[0046] Furthermore, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface.

[0047] Furthermore, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

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

[0049] Furthermore, the first side surface of the fifth lens and the second side surface of the fifth lens are both convex surfaces.

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

[0051] Furthermore, 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.

[0052] Furthermore, 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.

[0053] Furthermore, 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.

[0054] Furthermore, the eighth lens has positive power, 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.

[0055] Furthermore, the eighth lens has negative optical power, 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.

[0056] Furthermore, both the second lens and the eighth lens are aspherical lenses.

[0057] Further, the sixth lens and the seventh lens are cemented to form a cemented lens.

[0058] Further, the fifth lens, the sixth lens and the seventh lens are cemented to form a cemented lens.

[0059] Furthermore, the second side surface of the eighth lens has an inflection point.

[0060] Further, the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

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

[0062] Furthermore, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤12.

[0063] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.07.

[0064] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: TTL / H / θ≤3.5.

[0065] Furthermore, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤2.

[0066] Furthermore, the maximum light aperture D of the first side surface of the first lens corresponding to the maximum light aperture of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.04.

[0067] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤1.9.

[0068] Furthermore, the total optical length TTL of the optical lens, the entire focal length value F of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.8≤TTL / (F*θ)≤7.

[0069] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: 200≤(FOV*H) / F.

[0070] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 2.2≤(θ*H) / F.

[0071] Furthermore, a radius of curvature R4 of the second side surface of the second lens and a focal length value F of the entire optical lens group satisfy: R4 / F≤-0.001.

[0072] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-10.

[0073] Furthermore, a radius of curvature R7 of the first side surface of the fourth lens and a focal length F of the entire optical lens group satisfy: 0.5≤R7 / F≤8.

[0074] Furthermore, a curvature radius R9 of the first side surface of the fifth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: 0.1≤R9 / R12.

[0075] Furthermore, a radius of curvature R15 of the first side surface of the eighth lens and a focal length F of the entire optical lens group satisfy: 1.5≤R15 / F.

[0076] Further, the sixth lens and the seventh lens are cemented to form a cemented lens, and the focal length value F67 of the cemented lens and the focal length value F of the entire group of optical lenses satisfy: -20≤F67 / F≤20.

[0077] Furthermore, a radius of curvature R7 of the first side surface of the fourth lens and a total optical length TTL of the optical lens satisfy: 0.1≤R7 / TTL.

[0078] Furthermore, a radius of curvature R9 of the first side surface of the fifth lens and a total optical length TTL of the optical lens satisfy: 0.08≤R9 / TTL.

[0079] Furthermore, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: 0.3≤R3 / R4≤3.

[0080] Furthermore, a curvature radius R5 of the first side surface of the third lens and a curvature radius R6 of the second side surface of the third lens satisfy: -1.5≤R5 / R6≤1.5.

[0081] According to another aspect of the present invention, there is provided 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.

[0082] The above technical solution has a divergent effect on the light passing through the first lens by setting the first lens to have a negative focal length, so that the light emitted through the first lens maintains an upward trend. Under the same field of view angle condition, the light emitted through the second side of the first lens can enable the subsequent optical system to have a larger light receiving surface. By setting the first side of the first lens to be a convex surface and the second side of the first lens to be a concave surface, the incident angle of the light on the first side of the first lens can be smaller, and the light can smoothly reach the rear optical system through the first lens, which is conducive to achieving a large field of view. At the same time, the corresponding image height under the same field of view becomes larger, which is conducive to receiving light at a larger angle and reducing distortion. It can also be conducive to the sliding of water droplets in practical applications and reduce the impact on imaging.

[0083] By setting the second lens to have a negative focal length, it is beneficial to diverge the light. By setting the first side surface of the second lens to be a concave surface and the second side surface of the second lens to be a convex surface, it is beneficial to change the light trend, so that the light can smoothly enter the rear lens, which is beneficial to improve the imaging quality.

[0084] By setting the third lens to have positive focal power and the first side of the third lens to be convex, it is possible to better collect the light entering after passing through the second lens and smooth the light trend, which can further reduce aberrations and improve image quality. Optionally, the second side of the third lens is concave, and the light in the edge field of view will have a longer optical path than the light in the center field of view after passing through the third lens, which changes the light trend in the edge field of view, defocus corrects the aberration of the edge field of view, and achieves high resolution. Of course, the second side of the third lens can also be set to be convex, that is, the third lens is in a biconvex shape, so that the light can be effectively and smoothly converged at the end, so that the light can reach the image plane smoothly.

[0085] By setting the fourth lens to have a positive focal length, the light can smoothly transition into the rear lens, thereby improving the resolution. The convergence effect of the fourth lens on the light can further reduce the diameter of the rear port. By setting the first side of the fourth lens to be convex, it is beneficial for the light to smoothly transition to the fourth lens after passing through the third lens. Optionally, the second side of the fourth lens is convex, that is, the fourth lens is biconvex, which further converges the light and improves the resolution. Of course, the second side of the fourth lens can also be set to be concave, so that the fourth lens is a meniscus convex toward the first side, so that the optical path difference between the edge field of view and the center field of view light increases rapidly, which is beneficial to correct the aberration of the edge field of view and improve the image quality.

[0086] By setting the fifth lens to have a positive focal length, the light can be converged. Reasonable setting of the focal length of the fifth lens can not only further reduce aberrations and improve image quality, but also help the light to be effectively and smoothly converged at the end, so that the light can reach the image plane smoothly. By setting the first side surface of the fifth lens and the second side surface of the fifth lens to be convex, the light can be further converged, so that the light can smoothly transition to the fifth lens after passing through the front lens.

[0087] By setting the sixth lens to have a negative optical focal length, it has a divergent effect on the light. Since there are at least two positive optical focal length lenses on the first side of the sixth lens, while changing the trend of the light, it also brings about a larger aberration. The sixth lens with a negative optical focal length can effectively correct the various aberrations brought by the positive lens in front and improve the image quality. By setting the second side of the sixth lens to be a concave surface, it is beneficial to the smooth transition of light. Optionally, the first side of the sixth lens is a concave surface, so that the light entering the sixth lens has an obvious light turning, changing the trend of large-angle light. Of course, the first side of the sixth lens can also be set to a convex surface, which plays a role in further converging the light, so that the light smoothly transitions to the sixth lens after passing through the fourth lens and the fifth lens.

[0088] By setting the seventh lens to have a positive focal length, the first side of the seventh lens is a convex surface, which is conducive to the convergence of light. Reasonable setting of the focal length of the seventh lens can make the light converge effectively and smoothly at the end, so that the light reaches the eighth lens smoothly and reduces sensitivity. Optionally, the second side of the seventh lens is a convex surface, which plays a role in further converging the light, so that the light passes through the fifth lens and the sixth lens and smoothly transitions to the seventh lens. Of course, the second side of the seventh lens can also be set as a concave surface, which is conducive to the light entering the rear lens smoothly.

[0089] By setting the first side of the eighth lens to be convex and the second side of the eighth lens to be concave, the light will tend to diverge upward after passing through the second side of the eighth lens, which can make the light quickly accumulate at the height of the image plane, which is conducive to expanding the imaging range. At the same time, the light is less deflected forward and backward through the second side of the eighth lens, and the light energy loss is small, which is conducive to achieving a higher relative illumination, and the light trend is smooth. The change of the second side of the eighth lens has little effect on the light, which can reduce the sensitivity of the second side of the eighth lens. Optionally, the eighth lens has a positive optical focal length, which has a convergence effect on the light, and can further deflect the light toward the optical axis and reduce the rear port diameter. Of course, the eighth lens can also be set to have a negative optical focal length, which has a divergent effect on the light, which is conducive to expanding the imaging range. Reasonable distribution of optical focal length is conducive to reducing aberrations and improving optical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] 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:

[0091] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0092] Figure 2 A cross-sectional view of an optical lens according to Example 2 of the present invention is shown;

[0093] Figure 3 A cross-sectional view of an optical lens according to Example 3 of the present invention is shown;

[0094] Figure 4 A cross-sectional view of an optical lens according to Example 4 of the present invention is shown;

[0095] Figure 5 A cross-sectional view of an optical lens according to Example 5 of the present invention is shown;

[0096] Figure 6 A cross-sectional view of an optical lens according to Example 6 of the present invention is shown;

[0097] Figure 7 A cross-sectional view of an optical lens according to Example 7 of the present invention is shown;

[0098] Figure 8 A cross-sectional view of an optical lens according to Example 8 of the present invention is shown;

[0099] Fig. 9 A cross-sectional view of an optical lens according to Example 9 of the present invention is shown;

[0100] Fig.10 A cross-sectional view of an optical lens according to Example 10 of the present invention is shown.

[0101] The above drawings include the following reference numerals:

[0102] STO, aperture; L1, first lens; S1, first side surface of first lens; S2, second side surface of first lens; L2, second lens; S3, first side surface of second lens; S4, second side surface of second lens; L3, third lens; S5, first side surface of third lens; S6, second side surface of third lens; L4, fourth lens; S7, first side surface of fourth lens; S8, second side surface of fourth lens; L5, fifth lens; S9, first side surface of fifth lens; S10, second side surface of fifth lens;

[0103] L6, sixth lens; S11, first side surface of sixth lens; S12, second side surface of sixth lens; L7, seventh lens; S13, first side surface of seventh lens; S14, second side surface of seventh lens; L8, eighth lens; S15, first side surface of eighth lens; S16, second side surface of eighth lens; S17, first side surface of filter; S18, second side surface of filter; S19, first side surface of protective glass; S20, second side surface of protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] In order to solve at least one of the problems in the prior art that optical lenses are difficult to miniaturize, have a small field of view, have poor imaging quality in dark environments, have poor temperature performance, have severe aberrations, and have low light transmission capabilities, the present invention provides an optical lens and an electronic device having the same.

[0114] Embodiment 1

[0115] like Figures 1 to 10 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, wherein the first lens has a negative optical power, a first side surface of the first lens is a convex surface, and a second side surface of the first lens is a concave surface; the second lens has a negative optical power, a first side surface of the second lens is a concave surface, and a second side surface of the second lens is a convex surface; the third lens has a positive optical power, and a first side surface of the third lens is a convex surface; the fourth lens has a positive optical power, and a first side surface of the fourth lens is a convex surface; the fifth lens has a positive optical power, and a first side surface of the fifth lens and a second side surface of the fifth lens are both convex surfaces; the sixth lens has a negative optical power, and a second side surface of the sixth lens is a concave surface; the seventh lens has a positive optical power, and a first side surface of the seventh lens is a convex surface; the eighth lens has an optical power, a first side surface of the eighth lens is a convex surface, and a second side surface of the eighth lens is a concave surface.

[0116] By setting the first lens to have a negative optical focal length, the light passing through the first lens is diverged, and the light emitted through the first lens maintains an upward trend. Under the same field of view, the light emitted through the second side surface of the first lens can enable the subsequent optical system to have a larger light receiving surface.

[0117] By setting the first side surface of the first lens to be convex and the second side surface of the first lens to be concave, the incident angle of light on the first side surface of the first lens can be smaller, and the light can smoothly reach the rear optical system through the first lens, which is conducive to achieving a large field of view. At the same time, the corresponding image height under the same field of view becomes larger, which is conducive to receiving light at a larger angle and reducing distortion. In practical applications, it can also be beneficial to the sliding of water droplets and reduce the impact on imaging.

[0118] By setting the second lens to have a negative focal length, it is beneficial to diverge the light. By setting the first side surface of the second lens to be a concave surface and the second side surface of the second lens to be a convex surface, it is beneficial to change the light trend, so that the light can smoothly enter the rear lens, which is beneficial to improve the imaging quality.

[0119] By setting the third lens to have positive focal power and the first side surface of the third lens to be convex, the light entering after passing through the second lens can be better collected and the light trend can be smoothed, thereby further reducing aberrations and improving image quality.

[0120] Optionally, the second side surface of the third lens is concave, and the light of the edge field of view will have a longer optical path through the third lens than the light of the central field of view, thereby changing the light trend of the edge field of view, defocusing and correcting the aberration of the edge field of view, and achieving high resolution.

[0121] Of course, the second side surface of the third lens may be set to be a convex surface, that is, the third lens is in a biconvex shape, so that the light can be effectively and smoothly converged in the end and reach the image plane smoothly.

[0122] By setting the fourth lens to have a positive focal length, the light can smoothly transition to the rear lens, improving the resolution, and the convergence of the light by the fourth lens can further reduce the diameter of the rear port. By setting the first side surface of the fourth lens to be a convex surface, it is beneficial for the light to smoothly transition to the fourth lens after passing through the third lens.

[0123] Optionally, the second side surface of the fourth lens is a convex surface, that is, the fourth lens is a biconvex shape, which plays a role in further converging light and improving the resolution.

[0124] Of course, the second side surface of the fourth lens can also be set to be concave, so that the fourth lens is a meniscus convex toward the first side surface, so that the optical path difference between the edge field of view and the central field of view is rapidly increased, which is beneficial to correct the aberration of the edge field of view and improve the image quality.

[0125] By setting the fifth lens to have a positive optical power, it has a convergence effect on light. Reasonable setting of the optical power of the fifth lens can not only further reduce aberrations and improve image quality, but also help the light to converge effectively and smoothly in the end, so that the light can reach the image plane smoothly.

[0126] By setting the first side surface of the fifth lens and the second side surface of the fifth lens to be convex surfaces, the light can be further converged, so that the light can smoothly transition to the fifth lens after passing through the front lens.

[0127] By setting the sixth lens to have a negative focal length, the light is diverged. Since there are at least two positive focal length lenses on the first side of the sixth lens, while changing the light trend, it also brings about a larger aberration. The sixth lens with a negative focal length can effectively correct various aberrations brought by the positive lens in front and improve the image quality. By setting the second side surface of the sixth lens to be a concave surface, it is conducive to the smooth transition of light.

[0128] Optionally, the first side surface of the sixth lens is a concave surface, so that light entering the sixth lens has an obvious light deflection, thereby changing the trend of large-angle light.

[0129] Of course, the first side surface of the sixth lens may be set to be a convex surface to further converge the light, so that the light can smoothly transition to the sixth lens after passing through the fourth lens and the fifth lens.

[0130] By setting the seventh lens to have a positive optical power, the first side surface of the seventh lens is a convex surface, which is conducive to light convergence. Reasonable setting of the optical power of the seventh lens can make the light converge effectively and smoothly in the end, so that the light reaches the eighth lens smoothly, reducing sensitivity.

[0131] Optionally, the second side surface of the seventh lens is a convex surface, which plays a role in further converging light, so that the light can smoothly transition to the seventh lens after passing through the fifth lens and the sixth lens.

[0132] Of course, the second side surface of the seventh lens may also be set to be a concave surface, which is conducive to the light entering the rear lens smoothly.

[0133] By setting the first side surface of the eighth lens to be a convex surface and the second side surface of the eighth lens to be a concave surface, the light will tend to diverge upward after passing through the second side surface of the eighth lens, so that the light can be quickly accumulated at the height of the image plane, which is conducive to expanding the imaging range. At the same time, the light will be less deflected forward and backward through the second side surface of the eighth lens, and the light energy loss is small, which is conducive to achieving a higher relative illumination, and the light trend is gentle, and the change of the second side surface of the eighth lens has little effect on the light, which can reduce the sensitivity of the second side surface of the eighth lens.

[0134] Optionally, the eighth lens has positive optical power and has a converging effect on light, which can further deflect the light toward the optical axis and reduce the rear port diameter.

[0135] Of course, the eighth lens may also be provided with negative optical power to diverge the light, which is beneficial to expanding the imaging range. Reasonable distribution of optical power is beneficial to reducing aberrations and improving optical performance.

[0136] In this embodiment, the second lens and the eighth lens are both aspherical lenses, which is beneficial to correcting system aberrations, improving resolution, and especially reducing aberrations in large field of view.

[0137] Optionally, the sixth lens and the seventh lens are glued together to form a glued lens. The light passing through the fifth lens can be smoothly transitioned to the imaging surface, the total length of the optical lens can be reduced, and various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and optical properties such as distortion and CRA (chief light angle) can be optimized. By forming a glued lens, the air gap between the sixth lens and the seventh lens is reduced, which is conducive to reducing the total length of the optical lens, and can also reduce the assembly components between the sixth lens and the seventh lens, reduce the number of processes, reduce costs, and reduce the sensitivity of lens units to tolerances such as tilt and eccentricity generated during the assembly process. At the same time, the light loss caused by reflection between lenses can be reduced, the illumination can be improved, and the field curvature can be further reduced to correct the off-axis point aberrations of the system.

[0138] Of course, the fifth lens, the sixth lens and the seventh lens can also be glued together to form a glued lens. The light passing through the fourth lens can be smoothly transitioned to the imaging surface, the total length of the optical lens can be reduced, and the various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the optical performance such as distortion and CRA (chief light angle) can be optimized. By forming a glued lens, the air space between the fifth lens, the sixth lens and the seventh lens is reduced, which is conducive to reducing the total length of the optical lens. It can also reduce the assembly components between the fifth lens, the sixth lens and the seventh lens, reduce the process, reduce costs, and reduce the tolerance sensitivity of the lens unit due to tilt, eccentricity and other problems caused by the assembly process. At the same time, it can also reduce the light loss caused by reflection between lenses, improve illumination, and further reduce the field curvature. It can correct the off-axis point aberration of the optical lens.

[0139] Optionally, the second side surface of the eighth lens has an inflection point, which is beneficial to balancing the aberrations of the central field of view and the edge field of view and improving the resolution.

[0140] Of course, it is also possible to arrange that both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0141] In this embodiment, the optical lens also includes an aperture, which is located between the third lens and the fourth lens, which is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture at the rear end of the optical lens, and reduce the assembly sensitivity of the optical lens.

[0142] In this embodiment, the total optical length TTL of the optical lens and the focal length value F of the entire optical lens group satisfy: TTL / F≤12. By limiting TTL / F within a reasonable range and reasonably controlling the ratio of the total optical length to the focal length of the optical lens, the length of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤10.

[0143] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.07. By limiting TTL / H / FOV within a reasonable range, the length of the optical lens can be effectively limited under the same imaging plane and the same image height, which is conducive to miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.04.

[0144] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: TTL / H / θ≤3.5. By limiting TTL / H / θ within a reasonable range, under the same imaging plane and the same image height, the length of the optical lens can be effectively limited, which is conducive to the miniaturization of the optical lens. Preferably, TTL / H / θ≤2.0.

[0145] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens, the focal length value F of the entire group of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤2. By limiting |(HF*θ) / (F*θ)| within a reasonable range, it is ensured that the focal length of the optical lens is reasonably increased while the field angle of the optical lens and the size of the imaging surface remain unchanged, the imaging effect of the central area of ​​the imaging surface of the optical lens is highlighted, and the distortion is reduced. Preferably, |(HF*θ) / (F*θ)|≤1.2.

[0146] In this embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.04. By limiting D / H / FOV within a reasonable range, under the same maximum image height and maximum field of view, the front port diameter of the optical lens can be effectively limited, which is conducive to achieving a small diameter. Preferably, D / H / FOV≤0.02.

[0147] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤1.9. By limiting D / H / θ within a reasonable range, under the same maximum image height and maximum field angle, the front port diameter of the optical lens can be effectively limited, which is conducive to achieving a small diameter. Preferably, D / H / θ≤1.2.

[0148] In this embodiment, the total optical length TTL of the optical lens, the focal length value F of the entire optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 0.8≤TTL / (F*θ)≤7. By limiting TTL / (F*θ) within a reasonable range, under the same maximum image height and maximum field angle, the front port diameter of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. Preferably, 1.5≤TTL / (F*θ)≤5.

[0149] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: 200≤(FOV*H) / F. By limiting (FOV*H) / F within a reasonable range, it is beneficial to achieve a large field of view. At the same time, under the same imaging surface, a smaller focal length helps to receive light at a larger angle and reduce distortion. Preferably, 210≤(FOV*H) / F.

[0150] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 2.2≤(θ*H) / F. By limiting (θ*H) / F within a reasonable range, it is beneficial to achieve a large field angle. At the same time, under the same imaging surface, the focal length is smaller, which helps to receive light at a larger angle and reduce distortion. Preferably, 3≤(θ*H) / F.

[0151] In this embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥0.001. By limiting F3 / F within a reasonable range and reasonably setting the focal length of the third lens, it is beneficial to smoothly transition the light, prevent the light from excessively bending, keep the light height increase small, ensure a small aperture, and achieve miniaturization. Preferably, F3 / F≥1.

[0152] In this embodiment, the curvature radius R4 of the second side surface of the second lens and the focal length F of the entire optical lens group satisfy: R4 / F≤-0.001. By limiting R4 / F within a reasonable range and the second side surface of the second lens being a convex surface, it is beneficial to shrink the front light, reduce the height of the light entering the third lens, and reduce the front port diameter. Preferably, R4 / F≤-0.5.

[0153] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-10. By limiting F2 / F within a reasonable range, the focal power of the second lens is reasonably distributed, and the light entering through the first lens is collected, which is conducive to smoothing the trend of the previous light and image resolution; at the same time, the light emitted through the second side of the first lens can make the subsequent optical system have a larger light receiving surface, which is conducive to the expansion of the image plane on the one hand; on the other hand, it can realize the increase of the physical diameter of the diaphragm, the aperture becomes larger, and a larger amount of light can be achieved, which increases the brightness of the image plane. Preferably, F2 / F≤-20.

[0154] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the focal length F of the entire optical lens group satisfy: 0.5≤R7 / F≤8. By limiting R7 / F within a reasonable range and reasonably allocating the curvature radius of the first side surface of the fourth lens, it is helpful for light to smoothly enter the rear lens and improve the resolution. Preferably, 1≤R7 / F≤7.

[0155] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the curvature radius R12 of the second side surface of the sixth lens satisfy: 0.1≤R9 / R12. By limiting R9 / R12 within a reasonable range, the special shape of the first side surface of the fifth lens and the second side surface of the sixth lens can further converge the light, so that the light can smoothly transition to the rear lens after passing through the third lens and the fourth lens. At the same time, the focal length of the cemented lens composed of the fifth lens and the sixth lens is directly for the convergence of the light, which can further reduce the diameter of the rear port. Preferably, 0.2≤R9 / R12.

[0156] In this embodiment, the curvature radius R15 of the first side surface of the eighth lens and the focal length value F of the entire optical lens group satisfy: 1.5≤R15 / F. By limiting R15 / F to a reasonable range, the curvature radius of the first side surface of the eighth lens is larger, which helps to smoothly transition the light and reduce the sensitivity of the system. Preferably, 1.8≤R15 / F.

[0157] In this embodiment, the sixth lens and the seventh lens are cemented to form a cemented lens, and the focal length value F67 of the cemented lens and the focal length value F of the entire optical lens group satisfy: -20≤F67 / F≤20. By limiting F67 / F within a reasonable range and reasonably allocating focal lengths, it is helpful to achieve thermal compensation and obtain good temperature performance. Preferably, -10≤F67 / F≤10.

[0158] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.1≤R7 / TTL. By limiting R7 / TTL within a reasonable range, the curvature radius of the first side surface of the fourth lens is larger, which is beneficial to reducing the incident angle of the incident light on the first side surface of the fourth lens, and is beneficial to improving the imaging quality. Preferably, 0.22≤R7 / TTL.

[0159] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the total optical length TTL of the optical lens satisfy: 0.08≤R9 / TTL. By limiting R9 / TTL within a reasonable range, the curvature radius of the first side surface of the fifth lens is larger, which is beneficial to reducing the incident angle of the incident light on the first side surface of the fifth lens, and is beneficial to improving the imaging quality. Preferably, 0.15≤R9 / TTL.

[0160] In this embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens satisfy: 0.3≤R3 / R4≤3. By limiting R3 / R4 within a reasonable range, the shape of the second lens is close to concentric circles, which is conducive to the smooth transition of light trends and the improvement of imaging quality. Preferably, 0.45≤R3 / R4≤2.5.

[0161] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: -1.5≤R5 / R6≤1.5. By limiting R5 / R6 within a reasonable range, the shape of the third lens is biconvex or convex-concave, and the shape of the second lens is matched to make the light transition smoothly, which is conducive to improving the imaging quality. Preferably, -1.3≤R5 / R6≤1.3.

[0162] Embodiment 2

[0163] like Figures 1 to 10 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 a negative optical focal power; the second lens has a negative optical focal power; the third lens has a positive optical focal power; the fourth lens has a positive optical focal power; the fifth lens has a positive optical focal power; the sixth lens has a negative optical focal power; the seventh lens has a positive optical focal power; and the eighth lens has an optical focal power; wherein the focal length value F3 of the third lens and the focal length value F of the entire group of the optical lens satisfy: F3 / F≥0.001.

[0164] By setting the first lens to have a negative focal power, the light passing through the first lens has a divergent effect, and the light emitted through it maintains an upward trend. Under the same field of view, the light emitted through the second side of the first lens can enable the subsequent optical system to have a larger light receiving surface. By setting the second lens to have a negative focal power, it is beneficial to the divergence of light. By setting the third lens to have a positive focal power, it is possible to better collect the light entering after passing through the second lens and smooth the light trend, which can further reduce aberrations and improve image quality. By setting the fourth lens to have a positive focal power, the light trend can be smoothly transitioned into the rear lens, improving the resolution, and the convergence effect of the fourth lens on the light can further reduce the rear port diameter. By setting the fifth lens to have a positive focal power, it has a convergence effect on the light. Reasonable setting of the fifth lens focal power can not only further reduce aberrations and improve image quality, but also help the light to converge effectively and smoothly at the end, so that the light reaches the image plane smoothly.

[0165] By setting the sixth lens to have a negative focal power, it has a divergent effect on the light. Since there are at least two positive focal power lenses on the first side of the sixth lens, while changing the light trend, it also brings about a large aberration. The sixth lens has a negative focal power, which can effectively correct the various aberrations brought by the positive lens in front and improve the image quality. By setting the seventh lens to have a positive focal power, it is conducive to the convergence of light. Reasonable setting of the focal power of the seventh lens can make the light converge effectively and smoothly at the end, so that the light reaches the eighth lens smoothly, reducing the sensitivity. Optionally, the eighth lens has a positive focal power, which has a convergence effect on the light, and can further deflect the light in the direction of the optical axis to reduce the back port diameter. Of course, the eighth lens can also be set to have a negative focal power, which has a divergent effect on the light, which is conducive to expanding the imaging range. Reasonable allocation of focal power is conducive to reducing aberrations and improving optical performance. By limiting F3 / F within a reasonable range and reasonably setting the focal power of the third lens, it is conducive to a smooth transition of light, and the light will not be excessively bent, keeping the light height increase small, ensuring a small diameter, and miniaturization can be achieved.

[0166] Preferably, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥1.

[0167] By setting the first side surface of the first lens to be convex and the second side surface of the first lens to be concave, the incident angle of light on the first side surface of the first lens can be smaller, and the light can smoothly reach the rear optical system through the first lens, which is conducive to achieving a large field of view. At the same time, the corresponding image height under the same field of view becomes larger, which is conducive to receiving light at a larger angle and reducing distortion. In practical applications, it can also be beneficial to the sliding of water droplets and reduce the impact on imaging.

[0168] By setting the first side surface of the second lens to be a concave surface and the second side surface of the second lens to be a convex surface, it is helpful to change the direction of light, so that the light can smoothly enter the rear lens, which is helpful to improve the imaging quality.

[0169] By setting the first side of the third lens to be convex, it is possible to better collect the light entering after passing through the second lens and smooth the light trend, which can further reduce aberrations and improve image quality. Optionally, the second side of the third lens is concave, and the light in the edge field of view will have a longer optical path than the light in the center field of view after passing through the third lens, which changes the light trend of the edge field of view, defocus corrects the edge field of view aberration, and achieves high resolution. Of course, the second side of the third lens can also be set to be convex, that is, the third lens is a double convex shape, which can make the light converge effectively and smoothly at the end, so that the light reaches the image plane smoothly.

[0170] By setting the first side surface of the fourth lens to be convex, it is beneficial for the light to smoothly transition to the fourth lens after passing through the third lens. Optionally, the second side surface of the fourth lens is convex, that is, the fourth lens is in a biconvex shape, which plays a role in further converging light and improving resolution. Of course, it is also possible to set the second side surface of the fourth lens to be concave, so that the fourth lens is a meniscus convex to the first side surface, so that the optical path difference between the edge field of view and the center field of view light increases rapidly, which is beneficial to correct the aberration of the edge field of view and improve the image quality.

[0171] By setting the first side surface of the fifth lens and the second side surface of the fifth lens to be convex surfaces, the light can be further converged, so that the light can smoothly transition to the fifth lens after passing through the front lens.

[0172] By setting the second side surface of the sixth lens as a concave surface, it is beneficial for the light to transition smoothly. Optionally, the first side surface of the sixth lens is a concave surface, so that the light entering the sixth lens has a clear light turning, changing the trend of large-angle light. Of course, the first side surface of the sixth lens can also be set as a convex surface, which plays a role in further converging the light, so that the light can smoothly transition to the sixth lens after passing through the fourth lens and the fifth lens.

[0173] By setting the first side surface of the seventh lens to be convex, it is beneficial for light to converge, so that the light can reach the eighth lens smoothly, reducing sensitivity. Optionally, the second side surface of the seventh lens is convex, which plays a role in further converging light, so that the light can smoothly transition to the seventh lens after passing through the fifth lens and the sixth lens. Of course, the second side surface of the seventh lens can also be set to be concave, which is beneficial for light to smoothly enter the rear lens.

[0174] By setting the first side surface of the eighth lens to be a convex surface and the second side surface of the eighth lens to be a concave surface, the light will tend to diverge upward after passing through the second side surface of the eighth lens, so that the light can be quickly accumulated at the height of the image plane, which is conducive to expanding the imaging range. At the same time, the light will be less deflected forward and backward through the second side surface of the eighth lens, and the light energy loss is small, which is conducive to achieving a higher relative illumination, and the light trend is gentle, and the change of the second side surface of the eighth lens has little effect on the light, which can reduce the sensitivity of the second side surface of the eighth lens.

[0175] In this embodiment, the second lens and the eighth lens are both aspherical lenses, which is beneficial to correcting system aberrations, improving resolution, and especially reducing aberrations in large field of view.

[0176] Optionally, the sixth lens and the seventh lens are glued together to form a glued lens. The light passing through the fifth lens can be smoothly transitioned to the imaging surface, the total length of the optical lens can be reduced, and various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and optical properties such as distortion and CRA (chief light angle) can be optimized. By forming a glued lens, the air gap between the sixth lens and the seventh lens is reduced, which is conducive to reducing the total length of the optical lens, and can also reduce the assembly components between the sixth lens and the seventh lens, reduce the number of processes, reduce costs, and reduce the sensitivity of lens units to tolerances such as tilt and eccentricity generated during the assembly process. At the same time, the light loss caused by reflection between lenses can be reduced, the illumination can be improved, and the field curvature can be further reduced to correct the off-axis point aberrations of the system.

[0177] Of course, the fifth lens, the sixth lens and the seventh lens can also be glued together to form a glued lens. The light passing through the fourth lens can be smoothly transitioned to the imaging surface, the total length of the optical lens can be reduced, and the various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the optical performance such as distortion and CRA (chief light angle) can be optimized. By forming a glued lens, the air space between the fifth lens, the sixth lens and the seventh lens is reduced, which is conducive to reducing the total length of the optical lens. It can also reduce the assembly components between the fifth lens, the sixth lens and the seventh lens, reduce the process, reduce costs, and reduce the tolerance sensitivity of the lens unit due to tilt, eccentricity and other problems caused by the assembly process. At the same time, it can also reduce the light loss caused by reflection between lenses, improve illumination, and further reduce the field curvature. It can correct the off-axis point aberration of the optical lens.

[0178] Optionally, the second side surface of the eighth lens has an inflection point, which is beneficial to balancing the aberrations of the central field of view and the edge field of view and improving the resolution.

[0179] Of course, it is also possible to arrange that both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0180] In this embodiment, the optical lens also includes an aperture, which is located between the third lens and the fourth lens, which is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture at the rear end of the optical lens, and reduce the assembly sensitivity of the optical lens.

[0181] In this embodiment, the total optical length TTL of the optical lens and the focal length value F of the entire optical lens group satisfy: TTL / F≤12. By limiting TTL / F within a reasonable range and reasonably controlling the ratio of the total optical length to the focal length of the optical lens, the length of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤10.

[0182] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.07. By limiting TTL / H / FOV within a reasonable range, the length of the optical lens can be effectively limited under the same imaging plane and the same image height, which is conducive to miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.04.

[0183] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: TTL / H / θ≤3.5. By limiting TTL / H / θ within a reasonable range, under the same imaging plane and the same image height, the length of the optical lens can be effectively limited, which is conducive to the miniaturization of the optical lens. Preferably, TTL / H / θ≤2.0.

[0184] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens, the focal length value F of the entire group of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤2. By limiting |(HF*θ) / (F*θ)| within a reasonable range, it is ensured that the focal length of the optical lens is reasonably increased while the field angle of the optical lens and the size of the imaging surface remain unchanged, the imaging effect of the central area of ​​the imaging surface of the optical lens is highlighted, and the distortion is reduced. Preferably, |(HF*θ) / (F*θ)|≤1.2.

[0185] In this embodiment, the maximum clear aperture D of the first side of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.04. By limiting D / H / FOV within a reasonable range, under the same maximum image height and maximum field of view, the front port diameter of the optical lens can be effectively limited, which is conducive to achieving a small diameter. Preferably, D / H / FOV≤0.02.

[0186] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum clear aperture of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤1.9. By limiting D / H / θ within a reasonable range, under the same maximum image height and maximum field angle, the front port diameter of the optical lens can be effectively limited, which is conducive to achieving a small diameter. Preferably, D / H / θ≤1.2.

[0187] In this embodiment, the total optical length TTL of the optical lens, the focal length value F of the entire optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 0.8≤TTL / (F*θ)≤7. By limiting TTL / (F*θ) within a reasonable range, under the same maximum image height and maximum field angle, the front port diameter of the optical lens can be effectively limited, which is conducive to miniaturization of the optical lens. Preferably, 1.5≤TTL / (F*θ)≤5.

[0188] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: 200≤(FOV*H) / F. By limiting (FOV*H) / F within a reasonable range, it is beneficial to achieve a large field of view. At the same time, under the same imaging surface, a smaller focal length helps to receive light at a larger angle and reduce distortion. Preferably, 210≤(FOV*H) / F.

[0189] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ corresponding to the maximum field angle of the optical lens satisfy: 2.2≤(θ*H) / F. By limiting (θ*H) / F within a reasonable range, it is beneficial to achieve a large field angle. At the same time, under the same imaging surface, the focal length is smaller, which helps to receive light at a larger angle and reduce distortion. Preferably, 3≤(θ*H) / F.

[0190] In this embodiment, the curvature radius R4 of the second side surface of the second lens and the focal length F of the entire optical lens group satisfy: R4 / F≤-0.001. By limiting R4 / F within a reasonable range and the second side surface of the second lens being a convex surface, it is beneficial to shrink the front light, reduce the height of the light entering the third lens, and reduce the front port diameter. Preferably, R4 / F≤-0.5.

[0191] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-10. By limiting F2 / F within a reasonable range, the focal power of the second lens is reasonably distributed, and the light entering through the first lens is collected, which is conducive to smoothing the trend of the previous light and image resolution; at the same time, the light emitted through the second side of the first lens can make the subsequent optical system have a larger light receiving surface, which is conducive to the expansion of the image plane on the one hand; on the other hand, it can realize the increase of the physical diameter of the diaphragm, the aperture becomes larger, and a larger amount of light can be achieved, which increases the brightness of the image plane. Preferably, F2 / F≤-20.

[0192] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the focal length F of the entire optical lens group satisfy: 0.5≤R7 / F≤8. By limiting R7 / F within a reasonable range and reasonably allocating the curvature radius of the first side surface of the fourth lens, it is helpful for light to smoothly enter the rear lens and improve the resolution. Preferably, 1≤R7 / F≤7.

[0193] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the curvature radius R12 of the second side surface of the sixth lens satisfy: 0.1≤R9 / R12. By limiting R9 / R12 within a reasonable range, the special shape of the first side surface of the fifth lens and the second side surface of the sixth lens can further converge the light, so that the light can smoothly transition to the rear lens after passing through the third lens and the fourth lens. At the same time, the focal length of the cemented lens composed of the fifth lens and the sixth lens is directly for the convergence of the light, which can further reduce the diameter of the rear port. Preferably, 0.2≤R9 / R12.

[0194] In this embodiment, the curvature radius R15 of the first side surface of the eighth lens and the focal length value F of the entire optical lens group satisfy: 1.5≤R15 / F. By limiting R15 / F to a reasonable range, the curvature radius of the first side surface of the eighth lens is larger, which helps to smoothly transition the light and reduce the sensitivity of the system. Preferably, 1.8≤R15 / F.

[0195] In this embodiment, the sixth lens and the seventh lens are cemented to form a cemented lens, and the focal length value F67 of the cemented lens and the focal length value F of the entire optical lens group satisfy: -20≤F67 / F≤20. By limiting F67 / F within a reasonable range and reasonably allocating focal lengths, it is helpful to achieve thermal compensation and obtain good temperature performance. Preferably, -10≤F67 / F≤10.

[0196] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the total optical length TTL of the optical lens satisfy: 0.1≤R7 / TTL. By limiting R7 / TTL within a reasonable range, the curvature radius of the first side surface of the fourth lens is larger, which is beneficial to reducing the incident angle of the incident light on the first side surface of the fourth lens, and is beneficial to improving the imaging quality. Preferably, 0.22≤R7 / TTL.

[0197] In this embodiment, the curvature radius R9 of the first side surface of the fifth lens and the total optical length TTL of the optical lens satisfy: 0.08≤R9 / TTL. By limiting R9 / TTL within a reasonable range, the curvature radius of the first side surface of the fifth lens is larger, which is beneficial to reducing the incident angle of the incident light on the first side surface of the fifth lens, and is beneficial to improving the imaging quality. Preferably, 0.15≤R9 / TTL.

[0198] In this embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens satisfy: 0.3≤R3 / R4≤3. By limiting R3 / R4 within a reasonable range, the shape of the second lens is close to concentric circles, which is conducive to the smooth transition of light trends and the improvement of imaging quality. Preferably, 0.45≤R3 / R4≤2.5.

[0199] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy: -1.5≤R5 / R6≤1.5. By limiting R5 / R6 within a reasonable range, the shape of the third lens is biconvex or convex-concave, and the shape of the second lens is matched to make the light transition smoothly, which is conducive to improving the imaging quality. Preferably, -1.3≤R5 / R6≤1.3.

[0200] It should be noted that the total length TTL of the optical lens is the distance from the first side surface of the first lens to the imaging surface of the optical lens.

[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] 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.

[0203] 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 the stability of the system. 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, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the eighth lens may all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the eighth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the eighth lens in the optical lens may also be made of a combination of plastic and glass.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] Example 1

[0208] like Figure 1 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0209] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0210] In this example, the focal length F of the optical lens is 4.3262 mm, the total length TTL of the optical lens is 32.7991 mm, and the maximum field of view FOV of the optical lens is 120°.

[0211] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0212] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0213] 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.

[0214]

[0215]

[0216] Table 1

[0217] In this example, the second lens and the eighth lens are both aspheric lenses. The surface shape of each aspheric lens can be defined by but not limited to the following aspheric formula:

[0218]

[0219] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; and A is the high-order coefficient. Table 2 below shows the cone coefficient k and the high-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the surface of the aspheric lens in this example.

[0220] Surf K A B C D E F G 3 -1.1557 -4.4148E-04 2.3837E-05 -2.6014E-06 1.6346E-07 -2.4037E-09 -2.4037E-09 -2.4037E-09 4 -5.4153 -1.2585E-03 4.3133E-05 -1.9000E-06 5.3688E-08 1.4984E-10 1.4984E-10 1.4984E-10 15 -36.2110 -2.1050E-03 -2.0951E-05 -2.4252E-06 2.5193E-07 -1.1169E-08 -1.1169E-08 -1.1169E-08 16 -34.1160 -7.8032E-04 -1.1438E-04 1.4498E-05 -1.0054E-06 3.9096E-08 3.9096E-08 3.9096E-08

[0221] Table 2

[0222] Example 2

[0223] like Figure 2 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0224] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0225] In this example, the focal length F of the optical lens is 4.6772 mm, the total length TTL of the optical lens is 32.7991 mm, and the maximum field of view FOV of the optical lens is 120°.

[0226] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0227] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0228] Table 3 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.

[0229] Surf Radius Thickness Nd Vd 1 28.8850 1.3986 1.83 42.73 2 5.0257 5.8484 3 -6.5372 3.5676 1.51 56.22 4 -8.0930 0.1000 5 13.5919 3.4211 1.80 46.57 6 39.0242 1.6530 STO Infinity -0.1092 7 14.3003 2.6645 1.80 46.57 8 -60.1113 0.7550 9 8.6323 3.2088 1.52 64.21 10 -13.1787 0.0940 11 -12.8224 0.9964 1.92 20.88 12 / 13 8.8615 2.8512 1.62 63.41 14 -17.4005 0.1765 15 21.3619 2.4472 1.54 56.11 16 16.5281 0.7413 17 Infinity 0.5000 1.52 64.21 18 Infinity 1.5857 19 Infinity 0.4000 1.52 64.21 20 Infinity 0.4991 IMA / /

[0230] Table 3

[0231] In this example, the second lens and the eighth lens are both aspherical lenses. Table 4 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0232] Surf K A B C D E F G 3 -1.1673 -4.9053E-04 2.3837E-05 -2.3413E-06 1.6346E-07 -2.4037E-09 -1.7150E-10 6.1083E-12 4 -5.4153 -1.2585E-03 4.3133E-05 -1.9000E-06 5.3688E-08 1.4984E-10 -6.0350E-11 1.2014E-12 15 -36.2110 -2.1262E-03 -2.3279E-05 -2.4252E-06 2.5448E-07 -1.1169E-08 6.0796E-10 -1.4798E-11 16 -34.4610 -7.8032E-04 -1.1438E-04 1.4498E-05 -1.0054E-06 3.9096E-08 -3.9888E-10 -8.1850E-12

[0233] Table 4

[0234] Example 3

[0235] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0236] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0237] In this example, the focal length F of the optical lens is 4.7162 mm, the total length TTL of the optical lens is 32.7994 mm, and the maximum field of view FOV of the optical lens is 120°.

[0238] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0239] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0240] Table 5 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 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.

[0241]

[0242]

[0243] Table 5

[0244] In this example, the second lens and the eighth lens are both aspherical lenses. Table 6 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0245] Surf K A B C D E F G 3 -1.0442 -5.3646E-04 2.2735E-05 -2.6579E-06 1.5089E-07 -2.1872E-09 -1.0902E-10 3.2645E-12 4 -4.2746 -1.1486E-03 4.0664E-05 -2.1481E-06 6.0433E-08 4.8874E-10 -6.8249E-11 1.0543E-12 15 -16.7070 -2.3282E-03 -3.7853E-05 -4.6057E-06 1.5634E-07 -3.4042E-09 1.4970E-09 -5.5739E-11 16 -44.3980 -1.0152E-03 -1.5598E-04 1.4334E-05 -9.4522E-07 4.0511E-08 -4.6603E-10 -7.4985E-12

[0246] Table 6

[0247] Example 4

[0248] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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 negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0250] In this example, the focal length F of the optical lens is 4.3032 mm, the total length TTL of the optical lens is 32.7994 mm, and the maximum field of view FOV of the optical lens is 120°.

[0251] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0252] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0253] Table 7 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.

[0254] Surf Radius Thickness Nd Vd 1 29.7700 1.2110 1.83 42.73 2 5.2648 5.2184 3 -6.5405 3.9399 1.51 56.22 4 -8.2292 0.1000 5 13.8131 3.4211 1.80 46.57 6 48.8252 3.5972 STO Infinity -0.1092 7 9.8988 1.7042 1.80 46.57 8 220.7963 0.2548 9 9.7010 3.5000 1.52 64.21 10 -12.4837 0.0657 11 -12.8624 0.7931 1.92 20.88 12 / 13 9.7762 2.4911 1.62 63.41 14 -33.5030 0.8260 15 13.2079 2.1609 1.54 56.11 16 15.7549 0.7413 17 Infinity 0.5000 1.52 64.21 18 Infinity 1.4847 19 Infinity 0.4000 1.52 64.21 20 Infinity 0.4991 IMA / /

[0255] Table 7

[0256] In this example, the second lens and the eighth lens are both aspherical lenses. Table 8 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0257] Surf K A B C D E F G 3 -1.0442 -5.3646E-04 2.2735E-05 -2.6579E-06 1.5089E-07 -2.1872E-09 -1.0902E-10 3.2645E-12 4 -4.7496 -1.1486E-03 4.0664E-05 -2.1481E-06 6.0433E-08 4.8874E-10 -6.8249E-11 1.0543E-12 15 -15.0370 -2.3282E-03 -3.7853E-05 -4.6057E-06 1.5634E-07 -3.4042E-09 1.4970E-09 -5.5739E-11 16 -39.9580 -1.0152E-03 -1.5598E-04 1.4334E-05 -9.4522E-07 4.0511E-08 -4.6603E-10 -7.4985E-12

[0258] Table 8

[0259] Example 5

[0260] like Figure 5 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0261] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0262] In this example, the focal length F of the optical lens is 4.4178 mm, the total length TTL of the optical lens is 32.6793 mm, and the maximum field of view FOV of the optical lens is 120°.

[0263] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0264] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0265] Table 9 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 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.

[0266]

[0267]

[0268] Table 9

[0269] In this example, the second lens and the eighth lens are both aspherical lenses. Table 10 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0270] Surf K A B C D E F G 3 -1.2348 -4.9983E-04 2.4277E-05 -2.7475E-06 1.5646E-07 -1.9498E-09 -1.3078E-10 3.8792E-12 4 -6.5870 -1.0903E-03 4.1383E-05 -2.0055E-06 5.9094E-08 3.0628E-10 -6.6033E-11 1.1377E-12 15 -4.3192 -2.6056E-03 -6.1858E-05 -2.3006E-06 2.2018E-07 -1.4972E-08 6.7330E-10 4.4540E-12 16 -6.0109 -1.1024E-03 -1.5725E-04 1.4396E-05 -9.4466E-07 3.9892E-08 -5.3208E-10 -4.0364E-12

[0271] Table 10

[0272] Example 6

[0273] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0274] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has negative power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0275] In this example, the focal length F of the optical lens is 4.4991 mm, the total length TTL of the optical lens is 32.6793 mm, and the maximum field of view FOV of the optical lens is 120°.

[0276] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0277] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0278] Table 11 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.

[0279] Surf Radius Thickness Nd Vd 1 36.5114 1.3986 1.83 42.73 2 5.3064 4.7693 3 -7.7801 3.6389 1.51 56.22 4 -9.4955 0.1000 5 23.2359 3.4211 1.80 46.57 6 -52.0915 4.3713 STO Infinity -0.1870 7 12.8046 1.9305 1.80 46.57 8 -63.9429 0.3063 9 10.2634 3.1361 1.52 64.21 10 -13.0858 0.0779 11 -16.4132 0.9964 1.92 20.88 12 / 13 8.6649 2.8512 1.62 63.41 14 -47.4875 0.6168 15 9.1566 1.5613 1.54 56.11 16 8.3319 0.7413 17 Infinity 0.5000 1.52 64.21 18 Infinity 1.6700 19 Infinity 0.4000 1.52 64.21 20 Infinity 0.3793 IMA / /

[0280] Table 11

[0281] In this example, the second lens and the eighth lens are both aspherical lenses. Table 12 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0282]

[0283]

[0284] Table 12

[0285] Example 7

[0286] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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 negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0288] In this example, the focal length F of the optical lens is 4.8896 mm, the total length TTL of the optical lens is 32.6 mm, and the maximum field of view FOV of the optical lens is 120°.

[0289] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0290] In this example, both the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0291] Table 13 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.

[0292]

[0293]

[0294] Table 13

[0295] In this example, the second lens and the eighth lens are both aspherical lenses. Table 14 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0296] Surf K A B C D E F G 3 -0.8350 -6.5297E-04 1.3232E-05 -1.9634E-06 9.8362E-08 9.7916E-11 -9.5028E-11 -2.2592E-12 4 -5.0961 -1.7333E-03 5.7285E-05 -2.1170E-06 4.6706E-08 7.8183E-11 -2.7498E-11 4.9348E-14 15 26.8080 -2.7370E-03 -8.1770E-05 -1.7063E-06 1.5954E-07 -1.5690E-08 5.3893E-10 -6.3760E-12 16 -94.2450 -1.4308E-03 -1.4433E-04 1.3348E-05 -8.6171E-07 3.4397E-08 -6.9574E-10 6.0097E-12

[0297] Table 14

[0298] Example 8

[0299] like Figure 8 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0300] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0301] In this example, the focal length F of the optical lens is 4.6211 mm, the total length TTL of the optical lens is 32.6 mm, and the maximum field of view FOV of the optical lens is 120°.

[0302] In this example, 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 have different surface shapes when the curvature radius is the same, so the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0303] In this example, the second side surface of the eighth lens has an inflection point.

[0304] Table 15 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.

[0305] Surf Radius Thickness Nd Vd 1 27.2846 0.7500 1.83 42.73 2 5.3605 6.2591 3 -5.8676 3.4759 1.54 56.11 4 -7.3513 0.1000 5 37.2177 2.0464 1.80 46.57 6 -85.2017 0.1000 STO Infinity 1.8534 7 22.5108 3.2297 1.80 46.57 8 -49.9528 0.1000 9 8.4281 2.7191 1.52 64.21 10 -132.2214 1.1156 11 38.1016 0.9500 1.92 20.88 12 / 13 4.9182 3.7538 1.62 63.41 14 275.7647 0.7057 15 20.5118 1.8000 1.54 56.11 16 84.6576 0.7413 17 Infinity 0.5000 1.52 64.21 18 Infinity 1.5000 19 Infinity 0.4000 1.52 64.21 20 Infinity 0.5000 IMA / /

[0306] Table 15

[0307] In this example, the second lens and the eighth lens are both aspherical lenses. Table 16 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0308]

[0309] Table 16

[0310] Example 9

[0311] like Fig. 9 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0312] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0313] In this example, the focal length F of the optical lens is 4.7427 mm, the total length TTL of the optical lens is 32.8001 mm, and the maximum field of view FOV of the optical lens is 120°.

[0314] In this example, the fifth lens, the sixth lens and the seventh lens are cemented lenses, so the second side surface of the fifth lens and the first side surface of the sixth lens, as well as the second side surface of the sixth lens and the first side surface of the seventh lens, have different surface shapes when the curvature radius is the same. Therefore, the second side surface S10 of the fifth lens is a convex surface, the first side surface S11 of the sixth lens is a concave surface, the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0315] In this example, the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0316] Table 17 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 millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0317]

[0318]

[0319] Table 17

[0320] In this example, the second lens and the eighth lens are both aspherical lenses. Table 18 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0321] Surf K A B C D E F G 3 -1.3124 -4.6786E-04 2.1910E-05 -2.5118E-06 1.3766E-07 -2.4444E-09 -1.0936E-10 3.6372E-12 4 -6.4734 -1.1032E-03 4.2370E-05 -2.0527E-06 5.9439E-08 3.8599E-10 -7.1236E-11 1.2293E-12 14 -11.0880 -2.4543E-03 -3.1657E-05 -4.5090E-06 9.4154E-08 -3.1057E-09 1.9430E-09 -7.3375E-11 15 -27.7930 -1.1339E-03 -1.5779E-04 1.3452E-05 -9.3416E-07 4.2846E-08 -4.7020E-10 -1.0361E-11

[0322] Table 18

[0323] Example 10

[0324] like Fig.10 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, 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.

[0325] The first lens L1 has negative 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 concave, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, 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 concave, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The eighth lens L8 has positive power, the first side surface S15 of the eighth lens is convex, and the second side surface S16 of the eighth lens is concave. The filter has a first side surface S17 of the filter and a second side surface S18 of the filter. The protective glass has a first side surface S19 of the protective glass and a second side surface S20 of the protective glass. Light from the object passes through the surfaces S1 to S20 in sequence and is finally imaged on the imaging surface IMA.

[0326] In this example, the focal length F of the optical lens is 5.4386 mm, the total length TTL of the optical lens is 32.8001 mm, and the maximum field of view FOV of the optical lens is 120°.

[0327] In this example, the fifth lens, the sixth lens and the seventh lens are cemented lenses, so the second side surface of the fifth lens and the first side surface of the sixth lens, as well as the second side surface of the sixth lens and the first side surface of the seventh lens, have different surface shapes when the curvature radius is the same. Therefore, the second side surface S10 of the fifth lens is a convex surface, the first side surface S11 of the sixth lens is a concave surface, the second side surface S12 of the sixth lens is a concave surface, and the first side surface S13 of the seventh lens is a convex surface.

[0328] In this example, the first side surface of the eighth lens and the second side surface of the eighth lens have an inflection point.

[0329] Table 19 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.

[0330] Surf Radius Thickness Nd Vd 1 29.5422 1.3986 1.83 42.73 2 5.2110 5.0570 3 -6.6503 4.5857 1.51 56.22 4 -8.9663 0.1000 5 12.9941 3.4211 1.80 46.57 6 48.7664 3.4778 STO Infinity -0.1092 7 11.3084 1.8705 1.80 46.57 8 -300.1935 0.2548 9 14.4341 3.0481 1.52 64.21 10 / 11 -12.8349 0.6952 1.92 20.88 12 / 13 9.5075 1.8491 1.62 63.41 14 -29.7681 1.5633 15 12.7541 1.7245 1.54 56.11 16 13.6340 0.7413 17 Infinity 0.5000 1.52 64.21 18 Infinity 1.9077 19 Infinity 0.4000 1.52 64.21 20 Infinity 0.3144 IMA / /

[0331] Table 19

[0332] In this example, the second lens and the eighth lens are both aspherical lenses. Table 20 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but not limited to, the formula (1) in Example 1.

[0333] Surf K A B C D E F G 3 -1.3124 -4.6786E-04 2.1910E-05 -2.5118E-06 1.5296E-07 -2.4444E-09 -1.0936E-10 3.6372E-12 4 -6.5388 -1.1032E-03 4.2370E-05 -2.0527E-06 5.9439E-08 3.8599E-10 -7.1236E-11 1.2293E-12 14 -11.0880 -2.4543E-03 -3.5174E-05 -4.5090E-06 9.4154E-08 -3.1057E-09 1.9430E-09 -7.3375E-11 15 -30.8810 -1.1339E-03 -1.5779E-04 1.3452E-05 -9.3416E-07 4.2846E-08 -4.7020E-10 -1.0361E-11

[0334] Table 20

[0335] In summary, Examples 1 to 10 respectively satisfy the relationship shown in Table 21.

[0336] Conditional / Example 1 2 3 4 5 6 7 8 9 10 TTL / F 7.5815 7.0126 6.9546 7.6221 7.3972 7.2635 6.6672 7.0546 6.9159 6.0310 TTL / H / FOV 0.0285 0.0284 0.0281 0.0281 0.0278 0.0282 0.0282 0.0289 0.0287 0.0284 TTL / H / θ 1.6323 1.6250 1.6120 1.6111 1.5944 1.6181 1.6143 1.6551 1.6441 1.6246 |(HF*θ) / (F*θ)| 0.9815 0.9828 0.9828 0.9812 0.9815 0.9821 0.9836 0.9830 0.9833 0.9852 D / H / FOV 0.0120 0.0123 0.0127 0.0125 0.0124 0.0125 0.0113 0.0116 0.0124 0.0129 D / H / θ 0.6856 0.7044 0.7261 0.7143 0.7080 0.7151 0.6492 0.6656 0.7132 0.7376 TTL / (F*θ) 3.6199 3.3482 3.3206 3.6393 3.5319 3.4681 3.1834 3.3683 3.3021 2.8796 F3 / F 4.8425 5.2078 4.9827 5.3104 4.5965 4.5134 6.6480 6.9922 4.4487 3.8674 R4 / F -1.8707 -1.7303 -1.7449 -1.9123 -2.1494 -2.1105 -1.5035 -1.5908 -1.8905 -1.6486 F2 / F -49.2235 -64.1134 -63.5303 -69.6276 -67.9171 -66.6898 -27.7805 -65.0297 -63.2314 -28.1304 R7 / F 3.3055 3.0574 2.3088 2.3003 2.7604 2.8460 4.6038 4.8713 2.3844 2.0793 R9 / R12 0.9939 0.9741 0.9923 0.9923 1.1845 1.1845 1.7137 1.7137 1.1438 1.5182 R15 / F 4.8884 4.5672 2.8288 3.0693 2.2385 2.0352 4.6611 4.4387 2.4651 2.3451 F67 / F -3.7752 -3.2688 -2.5460 -2.7904 -2.8923 -2.8400 -4.5400 -5.3246 -2.6049 -2.2317 R7 / TTL 0.4360 0.4360 0.3320 0.3018 0.3732 0.3918 0.6905 0.6905 0.3448 0.3448 R9 / TTL 0.2632 0.2632 0.2958 0.2958 0.3141 0.3141 0.2585 0.2585 0.3637 0.4401 (FOV*H) / F 266.1125 247.2556 247.1854 271.0680 265.8183 257.1901 236.6402 244.2172 241.0070 212.6952 (θ*H) / F 4.6446 4.3154 4.3142 4.7310 4.6394 4.4888 4.1302 4.2624 4.2064 3.7122 R3 / R4 0.7917 0.8078 0.7948 0.7948 0.8193 0.8193 0.7583 0.7982 0.7807 0.7417 R5 / R6 0.3166 0.3483 0.2887 0.2829 -0.4461 -0.4461 -0.4281 -0.4368 0.2691 0.2665

[0337] Tables 21 and 22 give some parameters of the optical lenses of Examples 1 to 10.

[0338] Parameters / Examples 1 2 3 4 5 6 7 8 9 10 F 4.3262 4.6772 4.7162 4.3032 4.4178 4.4991 4.8896 4.6211 4.7427 5.4386 TTL 32.7991 32.7991 32.7994 32.7994 32.6793 32.6793 32.6000 32.6000 32.8001 32.8001 FOV 120.0000 120.0000 120.0000 120.0000 120.0000 120.0000 120.0000 120.0000 120.0000 120.0000 θ 2.0944 2.0944 2.0944 2.0944 2.0944 2.0944 2.0944 2.0944 2.0944 2.0944 H 9.5938 9.6372 9.7148 9.7205 9.7861 9.6427 9.6423 9.4046 9.5252 9.6397 D 13.7765 14.2176 14.7733 14.5431 14.5109 14.4417 13.1102 13.1102 14.2290 14.8914 F2 -212.9507 -299.8710 -299.6214 -299.6214 -300.0442 -300.0442 -135.8355 -300.5086 -299.8877 -152.9899 F3 20.9498 24.3578 23.4992 22.8515 20.3064 20.3064 32.5060 32.3117 21.0987 21.0332 R3 -6.4071 -6.5372 -6.5405 -6.5405 -7.7801 -7.7801 -5.5742 -5.8676 -7.0003 -6.6503 R4 -8.0930 -8.0930 -8.2292 -8.2292 -9.4955 -9.4955 -7.3513 -7.3513 -8.9663 -8.9663 R5 12.2327 13.5919 14.0950 13.8131 23.2359 23.2359 37.2177 37.2177 12.9941 12.9941 R6 38.6340 39.0242 48.8252 48.8252 -52.0915 -52.0915 -86.9405 -85.2017 48.2787 48.7664 R7 14.3003 14.3003 10.8887 9.8988 12.1949 12.8046 22.5108 22.5108 11.3084 11.3084 R9 8.6323 8.6323 9.7010 9.7010 10.2634 10.2634 8.4281 8.4281 11.9290 14.4341 R12 8.6851 8.8615 9.7762 9.7762 8.6649 8.6649 4.9182 4.9182 10.4293 9.5075 R15 21.1483 21.3619 13.3413 13.2079 9.8891 9.1566 22.7909 20.5118 11.6913 12.7541 F67 -16.3322 -15.2887 -12.0075 -12.0075 -12.7776 -12.7776 -22.1989 -24.6055 -12.3538 -12.1357

[0339] Table 22

[0340] 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.

[0341] 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.

[0342] 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.

[0343] 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 negative optical power, a first side surface of the first lens is a convex surface, and a second side surface of the first lens is a concave surface; a second lens, wherein the second lens has negative optical power, a first side surface of the second lens is a concave surface, and a second side surface of the second lens is a convex surface; A third lens, the third lens has positive optical power, and the first side surface of the third lens is a convex surface; a fourth lens having positive optical power, wherein a first side surface of the fourth lens is a convex surface; a fifth lens having positive optical power, wherein a first side surface of the fifth lens and a second side surface of the fifth lens are both convex surfaces; a sixth lens having negative optical power, wherein the second side surface of the sixth lens is a concave surface; a seventh lens having positive optical power, and a first side surface of the seventh lens being a convex surface; An eighth lens has optical power, a first side surface of the eighth lens is a convex surface, and a second side surface of the eighth lens is a concave surface.

2. The optical lens according to claim 1, characterized in that: A curvature radius R9 of the first side surface of the fifth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: 0.1≤R9 / R12.

3. The optical lens according to claim 1, characterized in that: The curvature radius R15 of the first side surface of the eighth lens and the focal length value F of the entire group of the optical lens satisfy the following relationship: 1.5≤R15 / F.

4. The optical lens according to claim 1, characterized in that: The sixth lens and the seventh lens are glued together to form a glued lens, and the focal length value F67 of the glued lens and the focal length value F of the entire group of the optical lens satisfy the following relationship: -20≤F67 / F≤20.

5. The optical lens according to claim 1, characterized in that: A curvature radius R7 of the first side surface of the fourth lens and a total optical length TTL of the optical lens satisfy the following relationship: 0.1≤R7 / TTL.

6. The optical lens according to claim 1, characterized in that: A curvature radius R9 of the first side surface of the fifth lens and a total optical length TTL of the optical lens satisfy the following relationship: 0.08≤R9 / TTL.

7. The optical lens according to claim 1, characterized in that: A curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: 0.3≤R3 / R4≤3.

8. The optical lens according to claim 1, characterized in that: A curvature radius R5 of the first side surface of the third lens and a curvature radius R6 of the second side surface of the third lens satisfy: -1.5≤R5 / R6≤1.

5.

9. An optical lens, characterized in that: include: a first lens having negative optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive refractive power; a fifth lens having positive refractive power; a sixth lens having negative optical power; a seventh lens having positive refractive power; an eighth lens having optical power; The focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥0.

001.

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.

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