Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from an object side to an image side along an optical axis, a first lens, the first lens having negative optical power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface; a second lens, the second lens having negative optical power, the object side surface of the second lens being a concave surface, and the image side surface of the second lens being a convex surface; a third lens, the third lens having positive optical power, at least one of the object side surface and the image side surface of the third lens being a convex surface; a fourth lens, the fourth lens having positive optical power, at least one of the object side surface and the image side surface of the fourth lens being a convex surface; and a fifth lens, the fifth lens having positive optical power, the object side surface of the fifth lens being a concave surface, and the image side surface of the fifth lens being a convex surface. The application solves the problem that the optical lens in the prior art cannot simultaneously achieve high energy collection and miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical lens and an electronic device. BACKGROUND

[0002] With the development of science and technology and the progress of society, the automobile auxiliary driving system is developing maturely, and the types of optical lenses are various. For example, the vehicle-mounted laser radar lens is applied more and more widely in automobiles as the main element of the automobile auxiliary driving system. After the laser radar emits, the energy of the reflected light is collected to accurately identify the environment details.

[0003] The vehicle-mounted laser radar lens is different from the ordinary optical lens. The receiving end lens of the laser radar needs to collect as much reflected light as possible, so that the chip at the rear can receive most of the energy of the reflected light. Therefore, the receiving end lens of the laser radar requires a small FNO, so that the optical lens can receive more light and achieve more energy collection. In addition, the back focus of most current vehicle-mounted laser radar lenses is short, which is not easy to assemble. Some vehicle-mounted laser radar lenses are not easy to realize imaging of a larger angle of light to detect a wider range. Therefore, the market currently needs a small optical lens that can realize high energy collection and other characteristics to detect a wider and farther distance and accurately identify the environment details.

[0004] That is, the optical lens in the prior art has the problem that high energy collection and miniaturization are difficult to be considered simultaneously. SUMMARY

[0005] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has the problem that high energy collection and miniaturization are difficult to be considered simultaneously.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical lens is provided, which comprises, in order from the object side to the image side along the optical axis: a first lens, the first lens having a negative focal power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface; a second lens, the second lens having a negative focal power, the object side surface of the second lens being a concave surface, and the image side surface of the second lens being a convex surface; a third lens, the third lens having a positive focal power, at least one of the object side surface and the image side surface of the third lens being a convex surface; a fourth lens, the fourth lens having a positive focal power, at least one of the object side surface and the image side surface of the fourth lens being a convex surface; and a fifth lens, the fifth lens having a positive focal power, the object side surface of the fifth lens being a concave surface, and the image side surface of the fifth lens being a convex surface.

[0007] Further, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface.

[0008] Further, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface.

[0009] Further, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface.

[0010] Further, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface.

[0011] Further, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface.

[0012] Further, the optical lens further comprises a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.

[0013] Further, the second lens and / or the fifth lens is an aspherical lens.

[0014] Further, the total track length of the optical lens, i.e., the distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL and the total focal length value F of the optical lens satisfy: TTL / F≤8.

[0015] Further, the focal length value F5 of the fifth lens of the optical lens and the total focal length value F of the optical lens satisfy: 0≤F5 / F.

[0016] Further, the radius of curvature R51 of the object side surface of the fifth lens of the optical lens and the focal length value F5 of the fifth lens of the optical lens satisfy: R51 / F5≤0.

[0017] Further, the maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle FOV of the optical lens satisfy: 0.71≤D / H / θ≤1.3.

[0018] Further, the maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle FOV of the optical lens satisfy: 0.71≤D / H / θ≤1.3.

[0019] Further, the total track length of the optical lens, i.e., the distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, 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: TTL / H / FOV≤0.05.

[0020] Further, an optical total length of the optical lens, i.e., a center distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, an image height H corresponding to a maximum field angle of the optical lens, and an arc value of the maximum field angle of the optical lens satisfy: TTL / H / 0≤3.

[0021] Further, an optical total length of the optical lens, i.e., a center distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, and a maximum half diameter DMAX of the first lens to the fifth lens satisfy: TTL / DMAX≤6.

[0022] Further, an overall focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.6.

[0023] Further, a half diameter Dstop of the stop of the optical lens, a maximum half diameter D2 of the second lens of the optical lens, a maximum half diameter D3 of the third lens of the optical lens, a maximum half diameter D4 of the fourth lens of the optical lens, and a maximum field angle FOV of the optical lens satisfy: 75≤Dstop / MAX(D2,D3,D4)*FOV.

[0024] Further, a maximum light passing diameter D of the object side of the first lens corresponding to the maximum field angle of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, and an overall focal length value F of the optical lens satisfy: D / H / F≤1.

[0025] Further, a focal length value F1 of the first lens of the optical lens and an overall focal length value F of the optical lens satisfy: |F1 / F|≤3.

[0026] Further, a focal length value F3 of the third lens of the optical lens and an overall focal length value F of the optical lens satisfy: |F3 / F|≤4.

[0027] Further, a focal length value F4 of the fourth lens of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: |F4 / F5|≤3.

[0028] Further, a center thickness d2 of the second lens, a distance d23 from the image side of the second lens to the object side of the third lens, and a center thickness d3 of the third lens satisfy: 0.5≤(d2+d23+d3) / (d2+d3)≤2.

[0029] Further, a center thickness d3 of the third lens, a distance d34 from the image side of the third lens to the object side of the fourth lens, and a center thickness d4 of the fourth lens satisfy: 1.2≤(d3+d34+d4) / (d3+d4).

[0030] Further, a central thickness d4 of the fourth lens, a distance d45 from an image-side surface of the fourth lens to an object-side surface of the fifth lens, and a central thickness d5 of the fifth lens satisfy: 1.2≤(d4+d45+d5) / (d4+d5).

[0031] Further, a sagittal height SAG41 of the object-side surface of the fourth lens of the optical lens and a sagittal height SAG42 of the image-side surface of the fourth lens of the optical lens satisfy: 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|.

[0032] Further, an opening angle of the image-side surface of the second lens of the optical lens at a maximum field angle of view and an opening angle of the object-side surface of the third lens of the optical lens at a maximum field angle of view satisfy:

[0033] Further, an R value R8 of the object-side surface of the fourth lens of the optical lens and an R value R9 of the image-side surface of the fourth lens of the optical lens satisfy: |R8 / R9|≤6.5.

[0034] Further, a maximum half aperture D4 of the fourth lens of the optical lens and a maximum half aperture D5 of the fifth lens of the optical lens satisfy: 0.7≤|D4 / D5|≤1.15.

[0035] Further, a maximum half aperture D52 of the image-side surface of the fifth lens of the optical lens and an image height H corresponding to a maximum field angle of view of the optical lens satisfy: 1≤D52 / (H / 2).

[0036] Further, an optical back focal length of the optical lens, i.e., a distance BFL from a center of an image-side surface of the fifth lens of the optical lens to a center of an imaging surface of the optical lens, a maximum field angle of view FOV of the optical lens, and an optical total track length TTL of the optical lens, i.e., a distance from a center of an object-side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 18≤BFL*FOV / TTL.

[0037] According to another aspect of the present application, an optical lens is provided, which comprises, in order from an object side to an image side along an optical axis, a first lens having a negative optical power, a second lens having a negative optical power, a third lens having a positive optical power, a fourth lens having a positive optical power, and a fifth lens having a positive optical power, wherein a curvature radius R51 of an object-side surface of the fifth lens of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: R51 / F5≤0.

[0038] Further, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave.

[0039] Further, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface.

[0040] Further, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface.

[0041] Further, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface.

[0042] Further, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface.

[0043] Further, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface.

[0044] Further, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface.

[0045] Further, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface.

[0046] Further, the optical lens further comprises a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.

[0047] Further, the second lens and / or the fifth lens is an aspherical lens.

[0048] Further, the total track length of the optical lens, i.e., the distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL and the total focal length value F of the optical lens satisfy: TTL / F≤8.

[0049] Further, the focal length value F5 of the fifth lens of the optical lens and the total focal length value F of the optical lens satisfy: 0≤F5 / F.

[0050] Further, the maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle FOV of the optical lens satisfy: 0.71≤D / H / θ≤1.3.

[0051] Further, the maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle FOV of the optical lens satisfy: 0.71≤D / H / θ≤1.3.

[0052] Further, the total track length of the optical lens, i.e., the distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, 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: TTL / H / FOV≤0.05.

[0053] Further, an optical total length of the optical lens, i.e., a center distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, an image height H corresponding to a maximum field angle of the optical lens, and an arc value of the maximum field angle of the optical lens satisfy: TTL / H / 0≤3.

[0054] Further, an optical total length of the optical lens, i.e., a center distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, and a maximum half diameter DMAX of the first lens to the fifth lens satisfy: TTL / DMAX≤6.

[0055] Further, an entire group focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.6.

[0056] Further, a half diameter Dstop of the stop of the optical lens, a maximum half diameter D2 of the second lens of the optical lens, a maximum half diameter D3 of the third lens of the optical lens, a maximum half diameter D4 of the fourth lens of the optical lens, and a maximum field angle FOV of the optical lens satisfy: 75≤Dstop / MAX(D2,D3,D4)*FOV.

[0057] Further, a maximum light passing diameter D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, and an entire group focal length value F of the optical lens satisfy: D / H / F≤1.

[0058] Further, a focal length value F1 of the first lens of the optical lens and an entire group focal length value F of the optical lens satisfy: |F1 / F|≤3.

[0059] Further, a focal length value F3 of the third lens of the optical lens and an entire group focal length value F of the optical lens satisfy: |F3 / F|≤4.

[0060] Further, a focal length value F4 of the fourth lens of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: |F4 / F5|≤3.

[0061] Further, a center thickness d2 of the second lens, a distance d23 from the image side surface of the second lens to the object side surface of the third lens, and a center thickness d3 of the third lens satisfy: 0.5≤(d2+d23+d3) / (d2+d3)≤2.

[0062] Further, a center thickness d3 of the third lens, a distance d34 from the image side surface of the third lens to the object side surface of the fourth lens, and a center thickness d4 of the fourth lens satisfy: 1.2≤(d3+d34+d4) / (d3+d4).

[0063] Further, a central thickness d4 of the fourth lens, a distance d45 from an image-side surface of the fourth lens to an object-side surface of the fifth lens, and a central thickness d5 of the fifth lens satisfy: 1.2≤(d4+d45+d5) / (d4+d5).

[0064] Further, a sagittal height SAG41 of the object-side surface of the fourth lens of the optical lens and a sagittal height SAG42 of the image-side surface of the fourth lens of the optical lens satisfy: 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|.

[0065] Further, an angle of view at a maximum field of view of the image-side surface of the second lens of the optical lens and an angle of view at a maximum field of view of the object-side surface of the third lens of the optical lens satisfy:

[0066] Further, an R value R8 of the object-side surface of the fourth lens of the optical lens and an R value R9 of the image-side surface of the fourth lens of the optical lens satisfy: |R8 / R9|≤6.5.

[0067] Further, a maximum half aperture D4 of the fourth lens of the optical lens and a maximum half aperture D5 of the fifth lens of the optical lens satisfy: 0.7≤|D4 / D5|≤1.15.

[0068] Further, a maximum half aperture D52 of the image-side surface of the fifth lens of the optical lens and an image height H corresponding to a maximum field of view of the optical lens satisfy: 1≤D52 / (H / 2).

[0069] Further, an optical back focal length of the optical lens, i.e., a distance BFL from a center of an image-side of the fifth lens of the optical lens to a center of an imaging surface of the optical lens, a maximum field of view FOV of the optical lens, and an optical total track length TTL of the optical lens, i.e., a distance from a center of an object-side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 18≤BFL*FOV / TTL.

[0070] According to another aspect of the present application, there is provided an electronic device comprising the optical lens described above and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0071] The optical lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens along an optical axis from an object side to an image side, the first lens has a negative focal length, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has a negative focal length, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has a positive focal length, at least one of the object side surface and the image side surface of the third lens is a convex surface; the fourth lens has a positive focal length, at least one of the object side surface and the image side surface of the fourth lens is a convex surface; and the fifth lens has a positive focal length, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface.

[0072] The first lens has a negative focal length and is short-focus, the image side surface of the first lens is a concave surface, which is beneficial to collecting large field of view light into the rear optical system, fixing the direction trend of the large-angle light at the edge, and realizing higher energy collection. The object side surface of the first lens is a convex surface, which is beneficial to the sliding of water droplets in actual application, and realizes higher energy collection. The first lens preferably uses a high refractive index material, which is beneficial to reducing the front aperture, reducing aberration, and realizing higher energy collection.

[0073] The second lens has a negative focal length, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface. The second lens is in a meniscus shape and has a low degree of curvature, which is beneficial to controlling the direction trend of the large-angle light at the edge passing through the first lens, realizing smooth transition of the light, reducing the aperture, and being beneficial to miniaturization and cost reduction.

[0074] The third lens has a positive focal length, at least one of the object side surface and the image side surface of the third lens is a convex surface; when the object side surface of the third lens is a convex surface and the image side surface of the third lens is a convex surface, it is beneficial to light convergence, the shape is double-convex, and the shape of the third lens is smooth, so that the divergent light smoothly enters the rear, and further makes the light trend smoothly transition. When the object side surface of the third lens is a concave surface and the image side surface of the third lens is a convex surface, the third lens is in a meniscus shape and has a low degree of curvature, which is beneficial to further controlling the direction trend of the large-angle light at the edge passing through the second lens, realizing smooth transition of the light, reducing the aperture, and being beneficial to miniaturization and cost reduction.

[0075] The fourth lens has positive focal power, and at least one of the object side surface and the image side surface of the fourth lens is convex; when the object side surface of the fourth lens is convex and the image side surface of the fourth lens is convex, it is beneficial to converge light, the shape is double-convex and the lens shape is gentle, so that the divergent light smoothly enters the rear, and further makes the light trend stable transition. When the object side surface of the fourth lens is convex and the image side surface of the fourth lens is concave, it is beneficial to collect large field of view light into the rear optical system, fix the direction trend of the large angle light at the edge, realize higher energy collection, and reduce the rear aperture. When the object side surface of the fourth lens is concave and the image side surface of the fourth lens is convex, it is beneficial to collect large field of view light into the rear optical system, fix the direction trend of the large angle light at the edge, realize higher energy collection, and reduce the rear aperture.

[0076] The fifth lens has positive focal power, the object side surface of the fifth lens is concave, the image side surface of the fifth lens is convex, the fifth lens is a lens curved to the object side, which is beneficial to collect the light passing through the fourth lens smoothly, reduce the sensitivity of the system, and is beneficial to realize higher energy collection; at the same time, it is easy to correct large angle aberration and realize larger angle imaging. The fifth lens has positive focal power and is a lens curved to the object side, which is beneficial to reduce the rear aperture of the optical lens, reduce the volume, is beneficial to realize miniaturization and cost reduction, is also beneficial to reduce the angle of light entering the detector and reduce the chief ray angle; at the same time, it is beneficial to increase the back focal length, is beneficial to assembly, and is not easy to produce ghost image.

[0077] In addition, the optical lens has the characteristics of easy to realize small CRA, easy to correct large angle aberration, realize larger angle imaging, long back focal length and easy to assemble, not easy to produce ghost image, miniaturization, small FNO and large ENPD. BRIEF DESCRIPTION OF DRAWINGS

[0078] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0079] Figure 1 The structure schematic diagram of the optical lens of example one of the present application is shown;

[0080] Figure 2 The structure schematic diagram of the optical lens of example two of the present application is shown;

[0081] Figure 3 The structure schematic diagram of the optical lens of example three of the present application is shown;

[0082] Figure 4 The structure schematic diagram of the optical lens of example four of the present application is shown;

[0083] Figure 5A structural schematic diagram of an optical lens of Example Five of the present application is shown.

[0084] Figure 6 A structural schematic diagram of an optical lens of Example Six of the present application is shown.

[0085] Figure 7 A structural schematic diagram of an optical lens of Example Seven of the present application is shown.

[0086] Figure 8 A structural schematic diagram of an optical lens of Example Eight of the present application is shown.

[0087] Among them, the above drawings include the following reference signs:

[0088] L1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; L2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; L3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; STO, stop; L4, fourth lens; S8, object side surface of the fourth lens; S9, image side surface of the fourth lens; L5, fifth lens; S10, object side surface of the fifth lens; S11, image side surface of the fifth lens; L6, filter; S12, object side surface of the filter; S13, image side surface of the filter; IMA, imaging surface. DETAILED DESCRIPTION

[0089] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0090] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0091] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0092] It should be noted that in the present 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, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0093] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0094] In this document, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, 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 specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the object side is the object side surface of the lens, and the surface of each lens near the image side is the image side surface of the lens. The judgment of the surface shape in the paraxial region can be made according to the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) positive or negative to judge the convexity or concavity. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0095] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. The left side is the object side, and the right side is the image side. In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens.

[0096] In order to solve the problem that the optical lens in the prior art cannot simultaneously achieve high energy collection and miniaturization, the present application provides an optical lens and an electronic device.

[0097] Embodiment one

[0098] As shown in Figures 1 to 8 the optical lens includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has a negative focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative focal power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex. The third lens has a positive focal power, at least one of the object side surface and the image side surface of the third lens is convex. The fourth lens has a positive focal power, at least one of the object side surface and the image side surface of the fourth lens is convex. The fifth lens has a positive focal power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex.

[0099] The first lens has negative focal power and is short-focus, the image side surface of the first lens is concave, which is beneficial to collect large field of view light into the rear optical system, fix the direction trend of the large angle light at the edge, and realize higher energy collection. The object side surface of the first lens is convex, which is beneficial to the sliding of water droplets in actual application, and realizes higher energy collection. The first lens preferably uses high refractive index material, which is beneficial to the reduction of the front aperture, the reduction of aberration, and the realization of higher energy collection.

[0100] The second lens has negative focal power, the object side surface of the second lens is concave, and the image side surface of the second lens is convex. The second lens is in a meniscus shape and has low curvature, which is beneficial to control the direction trend of the large angle light at the edge passing through the first lens, realize smooth transition of light, reduce the aperture, and is beneficial to miniaturization and cost reduction.

[0101] The third lens has positive focal power, and at least one of the object side surface and the image side surface of the third lens is convex. When the object side surface of the third lens is convex and the image side surface of the third lens is convex, it is beneficial to converge light, the shape is double convex, and the shape of the third lens is smooth, so that the divergent light smoothly enters the rear, and further makes the light trend smoothly transition. When the object side surface of the third lens is concave and the image side surface of the third lens is convex, the third lens is in a meniscus shape and has low curvature, which is beneficial to further control the direction trend of the large angle light at the edge passing through the second lens, realize smooth transition of light, reduce the aperture, and is beneficial to miniaturization and cost reduction.

[0102] The fourth lens has positive focal power, and at least one of the object side surface and the image side surface of the fourth lens is convex. When the object side surface of the fourth lens is convex and the image side surface of the fourth lens is convex, it is beneficial to converge light, the shape is double convex, and the shape of the lens is smooth, so that the divergent light smoothly enters the rear, and further makes the light trend smoothly transition. When the object side surface of the fourth lens is convex and the image side surface of the fourth lens is concave, it is beneficial to collect large field of view light into the rear optical system, fix the direction trend of the large angle light at the edge, realize higher energy collection, and reduce the rear aperture. When the object side surface of the fourth lens is concave and the image side surface of the fourth lens is convex, it is beneficial to collect large field of view light into the rear optical system, fix the direction trend of the large angle light at the edge, realize higher energy collection, and reduce the rear aperture.

[0103] The fifth lens has positive refractive power, the object side surface of the fifth lens is a concave surface, the image side surface of the fifth lens is a convex surface, the fifth lens is a lens curved to the object side, is conducive to collecting light rays passing through the fourth lens, reducing the sensitivity of the system, and is conducive to realizing higher energy collection; at the same time, it is easy to correct large angle aberration and realize larger angle imaging. The fifth lens has positive refractive power, and the lens curved to the object side is conducive to reducing the rear end aperture of the optical lens, reducing the volume, being conducive to miniaturization and cost reduction, and also being conducive to reducing the angle of light entering the detector and the chief ray angle; at the same time, it is conducive to the growth of the back focus, is conducive to assembly, and is not easy to produce ghost images.

[0104] In addition, the optical lens has the characteristics of easy to realize small CRA, easy to correct large angle aberration, realize larger angle imaging, long back focus, easy to assemble, not easy to produce ghost images, miniaturization, small FNO and large ENPD.

[0105] In the embodiment, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface. In this way, the light rays are converged, the shape is double convex, and the shape of the third lens is gentle, so that the divergent light rays smoothly enter the rear, and the light ray trend is further smoothly transitioned.

[0106] In the embodiment, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface. The third lens is a meniscus shape, and the curvature degree is low, which is conducive to further controlling the direction trend of the edge large angle light rays passing through the second lens, realizing the smooth transition of the light rays, reducing the aperture, and being conducive to miniaturization and cost reduction.

[0107] In the embodiment, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface. In this way, the light rays are converged, the shape is double convex, and the shape of the lens is gentle, so that the divergent light rays smoothly enter the rear, and the light ray trend is further smoothly transitioned.

[0108] In the embodiment, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface. In this way, it is conducive to collecting large field of view light rays into the rear optical system, fixing the direction trend of the edge large angle light rays, realizing higher energy collection, and reducing the rear end aperture.

[0109] In the embodiment, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface. In this way, it is conducive to collecting large field of view light rays into the rear optical system, fixing the direction trend of the edge large angle light rays, realizing higher energy collection, and reducing the rear end aperture.

[0110] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. This is conducive to effectively converging the light entering the optical system, reducing the lens aperture of the optical system, making the overall optical system aperture small, more compact, facilitating miniaturization, and facilitating the realization of small CRA.

[0111] In the embodiment, the second lens and the fifth lens are aspherical lenses, which are conducive to reducing aberration and correcting field curvature, so that the optical system realizes higher energy collection.

[0112] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the overall focal length F of the optical lens satisfy: TTL / F≤8. Satisfying this condition is conducive to miniaturization, making the structure of the optical lens more compact. Preferably, TTL / F≤7.

[0113] In the embodiment, the focal length F5 of the fifth lens of the optical lens and the overall focal length F of the optical lens satisfy: 0≤F5 / F. Satisfying this condition ensures that the fifth lens has positive refractive power, which is conducive to the smooth transition of light passing through the fourth lens and the realization of higher energy collection. Preferably, 1≤F5 / F.

[0114] In the embodiment, the radius of curvature R51 of the object side of the fifth lens of the optical lens and the focal length F5 of the fifth lens of the optical lens satisfy: R51 / F5≤0. Satisfying this condition ensures that the fifth lens has positive refractive power and the fifth lens is bent toward the object side, which is conducive to correcting large-angle aberration and realizing larger-angle imaging. Preferably, R51 / F5≤-3.

[0115] In the embodiment, the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle 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: D / H / FOV≤0.03. Satisfying this condition ensures that the front end aperture of the optical lens is small, which is conducive to miniaturization. Preferably, D / H / FOV≤0.02.

[0116] In the embodiment, the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: 0.71≤D / H / θ≤1.3. Satisfying this condition ensures that the front end aperture of the optical lens is small, which is conducive to miniaturization. Preferably, 0.75≤D / H / θ≤1.5.

[0117] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: TTL / H / FOV≤0.05. Satisfying the condition formula is beneficial to ensure miniaturization, so that the optical lens is more compact. Preferably, TTL / H / FOV≤0.04.

[0118] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤3. Satisfying the condition formula is beneficial to ensure miniaturization, so that the optical lens is more compact. Preferably, TTL / H / θ≤2.5.

[0119] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the maximum half diameter DMAX in the first lens to the fifth lens satisfy: TTL / DMAX≤6. Satisfying the condition formula ensures that TTL is small and DMAX is large, so that TTL / DMAX is small enough, which is beneficial to make the optical lens more compact as a whole and reduce the volume of the optical lens. Preferably, TTL / DMAX≤5.5.

[0120] In the embodiment, the total focal length value F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.6. Satisfying the condition formula ensures that the entrance pupil diameter is large and the FNO is small, which is beneficial to increase the light quantity. Preferably, F / EPD≤1.5.

[0121] In the embodiment, the half diameter Dstop of the stop of the optical lens, the maximum half diameter D2 of the second lens of the optical lens, the maximum half diameter D3 of the third lens of the optical lens, the maximum half diameter D4 of the fourth lens of the optical lens, and the maximum field angle FOV of the optical lens satisfy: 75≤Dstop / MAX(D2,D3,D4)*FOV. Satisfying the condition formula ensures that under a large field angle, the larger the ratio of the stop diameter to the lens diameter, the larger the entrance pupil diameter, which ensures a small FNO and is beneficial to increase the light quantity. Preferably, 75.5≤Dstop / MAX(D2,D3,D4)*FOV.

[0122] In the embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the overall focal length F of the optical lens satisfy D / H / F≤1. When the condition is satisfied, the optical lens can have the characteristics of a large target surface and a small aperture under the condition of a fixed focal length. Preferably, D / H / F≤0.5.

[0123] In the embodiment, the focal length F1 of the first lens of the optical lens and the overall focal length F of the optical lens satisfy |F1 / F|≤3. When the condition is satisfied, the first lens is ensured to be short-focus, which is conducive to collecting large field angle light into the rear optical system, fixing the direction trend of the edge large angle light, and realizing higher energy collection. Preferably, |F1 / F|≤2.5.

[0124] In the embodiment, the focal length F3 of the third lens of the optical lens and the overall focal length F of the optical lens satisfy |F3 / F|≤4. When the condition is satisfied, the third lens is ensured to be short-focus, which is conducive to controlling the light trend between the second lens and the fourth lens, reducing the aberration caused by the large angle light entering through the first lens, and making the optical lens structure more compact, which is conducive to ensuring miniaturization. Preferably, |F3 / F|≤3.5.

[0125] In the embodiment, the focal length F4 of the fourth lens of the optical lens and the focal length F5 of the fifth lens of the optical lens satisfy |F4 / F5|≤3. When the condition is satisfied, the focal lengths of the fourth lens and the fifth lens are ensured to be similar, which is conducive to the smooth transition of light into the fifth lens, reduces the system sensitivity, and is conducive to realizing higher energy collection. Preferably, |F4 / F5|≤2.5.

[0126] In the embodiment, the central thickness d2 of the second lens, the distance d23 from the image side of the second lens to the object side of the third lens, and the central thickness d3 of the third lens satisfy 0.5≤(d2+d23+d3) / (d2+d3)≤2. When the condition is satisfied, the distance between the second lens and the third lens is ensured to be very close, the sizes of the second lens and the third lens are ensured to be relatively uniform, and the optical lens as a whole is more compact. Preferably, 0.8≤(d2+d23+d3) / (d2+d3)≤1.5.

[0127] In the embodiment, the central thickness d3 of the third lens, the distance d34 from the image side of the third lens to the object side of the fourth lens, and the central thickness d4 of the fourth lens satisfy 1.2≤(d3+d34+d4) / (d3+d4). When the condition is satisfied, the distance between the third lens and the fourth lens is ensured to be far, which is conducive to the smooth transition of light and conducive to realizing higher energy collection. Preferably, 1.3≤(d3+d34+d4) / (d3+d4).

[0128] In the embodiment, the central thickness d4 of the fourth lens, the distance d45 from the image side surface of the fourth lens to the object side surface of the fifth lens, and the central thickness d5 of the fifth lens satisfy: 1.2≤(d4+d45+d5) / (d4+d5). Satisfying the condition formula ensures that the fourth lens is far away from the fifth lens, which is beneficial to the smooth transition of light and is beneficial to achieving higher energy collection. Preferably, 1.3≤(d4+d45+d5) / (d4+d5).

[0129] In the embodiment, the sagittal height SAG41 of the object side surface of the fourth lens of the optical lens and the sagittal height SAG42 of the image side surface of the fourth lens of the optical lens satisfy: 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|. The fourth lens adopts a special-shaped lens, one side is flat and the other side is curved, which is beneficial to compress light and achieve small FNO and reduce the system aperture. Preferably, 3.5≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|.

[0130] In the embodiment, the opening angle of the image side surface of the second lens of the optical lens at the maximum field of view angle and the opening angle of the object side surface of the third lens of the optical lens at the maximum field of view angle satisfy: Satisfying the condition formula ensures that the opening angle of the image side surface of the second lens is small, and is close to the opening angle of the object side surface of the third lens, which ensures that when the light emitted from the second lens is incident on the object side surface of the third lens, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical lens. Preferably,

[0131] In the embodiment, the R value R8 of the object side surface of the fourth lens of the optical lens and the R value R9 of the image side surface of the fourth lens of the optical lens satisfy: |R8 / R9|≤6.5. The fourth lens adopts a special-shaped lens, one side is flat and the other side is curved, which is beneficial to compress light, achieve small FNO, and reduce the system aperture. Preferably, |R8 / R9|≤6.2.

[0132] In the embodiment, the maximum half aperture D4 of the fourth lens of the optical lens and the maximum half aperture D5 of the fifth lens of the optical lens satisfy: 0.7≤|D4 / D5|≤1.15. The fifth lens is bent to the object side, which is beneficial to the reduction of the rear end aperture of the optical lens, can make the maximum light passing half aperture of the fourth lens and the maximum light passing half aperture of the fifth lens close, thereby making the sizes of the two lenses uniform, which is beneficial to making the optical lens more compact. Preferably, 0.8≤|D4 / D5|≤1.1.

[0133] In this embodiment, the maximum half-aperture D52 of the image side of the fifth lens of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: 1 ≤ D52 / (H / 2). Satisfying this condition, assuming the fifth lens is bent towards the object side, helps to achieve a small principal ray angle. Preferably, 1.1 ≤ D52 / (H / 2).

[0134] In this embodiment, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the image side of the fifth lens to the center of the imaging plane, the maximum field of view (FOV) of the optical lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging plane, satisfy the condition: 18 ≤ BFL * FOV / TTL. Satisfying this condition ensures that the fifth lens has positive optical power and is curved towards the object side at a large field of view, which is more conducive to achieving a long back focal length, facilitates assembly, and reduces the likelihood of ghosting. Preferably, 19 ≤ BFL * FOV / TTL.

[0135] Example 2

[0136] like Figures 1 to 8 As shown, the optical lens, along the optical axis from the object side to the image side, includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence. The first lens has negative optical power; the second lens has negative optical power; the third lens has positive optical power; the fourth lens has positive optical power; and the fifth lens has positive optical power. The radius of curvature R51 of the object side surface of the fifth lens satisfies the condition R51 / F5≤0 with respect to the focal length F5 of the fifth lens. Satisfying this condition ensures that the fifth lens has positive optical power, and since the fifth lens bends towards the object side, it is beneficial for correcting large-angle aberrations and achieving imaging at a wider angle. Preferably, R51 / F5≤-3.

[0137] In this embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave. The first lens has negative optical power and a short focal length. The concave image-side surface facilitates the collection of light rays from a large field of view into the rear optical system, fixing the direction of large-angle light rays at the edges and achieving higher energy collection. The convex object-side surface of the first lens, in practical applications, facilitates the sliding of water droplets, achieving even higher energy collection. Preferably, the first lens is made of a high-refractive-index material, which helps to reduce the front aperture, reduce aberrations, and achieve higher energy collection.

[0138] In this embodiment, the object-side surface of the second lens is concave, and the image-side surface is convex. The second lens is meniscus-shaped with a low degree of curvature, which helps to control the direction of large-angle light rays passing through the edge of the first lens, achieving a smooth transition of light rays, reducing the aperture, and facilitating miniaturization and cost reduction.

[0139] In the embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. This is conducive to light convergence, and the shape is biconvex and the shape of the third lens is gentle, so that the divergent light smoothly enters the rear, and further makes the light trend transition smoothly.

[0140] In the embodiment, the object side surface of the third lens is concave, and the image side surface of the third lens is convex, and the third lens is a crescent shape and has a low degree of curvature. This is conducive to further controlling the direction of the edge large-angle light passing through the second lens, achieving a smooth transition of the light, reducing the aperture, and facilitating miniaturization and cost reduction.

[0141] In the embodiment, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex. This is conducive to light convergence, and the shape is biconvex and the shape of the lens is gentle, so that the divergent light smoothly enters the rear, and further makes the light trend transition smoothly.

[0142] In the embodiment, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave. This is conducive to collecting large field of view light into the rear optical system, fixing the direction of the edge large-angle light, achieving higher energy collection, and reducing the rear aperture.

[0143] In the embodiment, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. This is conducive to collecting large field of view light into the rear optical system, fixing the direction of the edge large-angle light, achieving higher energy collection, and reducing the rear aperture.

[0144] In the embodiment, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex. The fifth lens is a lens curved towards the object side, which is conducive to collecting light passing through the fourth lens to transition smoothly, reducing system sensitivity, and facilitating higher energy collection. At the same time, it is easy to correct large-angle aberration to achieve larger-angle imaging. The fifth lens has a positive focal power and is a lens curved towards the object side, which is conducive to reducing the rear aperture of the optical lens, reducing the volume, facilitating miniaturization and cost reduction, and reducing the angle of light entering the detector and the chief ray angle. At the same time, it is conducive to the growth of the back focus, facilitates assembly, and is not prone to ghost images.

[0145] In addition, the optical lens of the present application has the characteristics of easy to achieve small CRA, easy to correct large-angle aberration to achieve larger-angle imaging, long back focus and easy to assemble, not prone to ghost images, miniaturization, small FNO and large ENPD.

[0146] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. This is conducive to effectively converging the light entering the optical system, reducing the lens aperture of the optical system, making the overall optical system aperture small, more compact, facilitating miniaturization, and facilitating the realization of small CRA.

[0147] In the embodiment, the second lens and the fifth lens are aspherical lenses, which are conducive to reducing aberration and correcting field curvature, so that the optical system realizes higher energy collection.

[0148] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the overall focal length F of the optical lens satisfy: TTL / F≤8. Satisfying this condition is conducive to realizing miniaturization and making the structure of the optical lens more compact. Preferably, TTL / F≤7.

[0149] In the embodiment, the focal length F5 of the fifth lens of the optical lens and the overall focal length F of the optical lens satisfy: 0≤F5 / F. Satisfying this condition ensures that the fifth lens has positive refractive power, is conducive to collecting light passing through the fourth lens smoothly, and is conducive to realizing higher energy collection. Preferably, 1≤F5 / F.

[0150] In the embodiment, the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle 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: D / H / FOV≤0.03. Satisfying this condition ensures that the front end aperture of the optical lens is small, which is conducive to realizing miniaturization. Preferably, D / H / FOV≤0.02.

[0151] In the embodiment, the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: 0.71≤D / H / θ≤1.3. Satisfying this condition ensures that the front end aperture of the optical lens is small, which is conducive to realizing miniaturization. Preferably, 0.75≤D / H / θ≤1.5.

[0152] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side of the first lens of the optical lens to the center of the imaging surface 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: TTL / H / FOV≤0.05. Satisfying this condition is conducive to ensuring miniaturization and making the optical lens more compact. Preferably, TTL / H / FOV≤0.04.

[0153] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: TTL / H / θ≤3. Satisfying the condition formula is beneficial to guarantee miniaturization, so that the optical lens is more compact. Preferably, TTL / H / θ≤2.5.

[0154] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the maximum half aperture DMAX in the first lens to the fifth lens satisfy: TTL / DMAX≤6. Satisfying the condition formula guarantees that TTL is small and DMAX is large, so that TTL / DMAX is small enough, which is beneficial to make the optical lens more compact as a whole and reduce the volume of the optical lens. Preferably, TTL / DMAX≤5.5.

[0155] In the embodiment, the total focal length value F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.6. Satisfying the condition formula guarantees that the entrance pupil diameter is large and the FNO is small, which is beneficial to increase the light quantity. Preferably, F / EPD≤1.5.

[0156] In the embodiment, the half aperture Dstop of the optical stop of the optical lens, the maximum half aperture D2 of the second lens of the optical lens, the maximum half aperture D3 of the third lens of the optical lens, the maximum half aperture D4 of the fourth lens of the optical lens, and the maximum field angle FOV of the optical lens satisfy: 75≤Dstop / MAX(D2,D3,D4)*FOV. Satisfying the condition formula guarantees that the larger the ratio of the stop aperture to the lens aperture under a large field angle, the larger the entrance pupil diameter, which guarantees a small FNO and is beneficial to increase the light quantity. Preferably, 75.5≤Dstop / MAX(D2,D3,D4)*FOV.

[0157] In the embodiment, the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total focal length value F of the optical lens satisfy: D / H / F≤1. Satisfying the condition formula can provide the optical lens with the characteristics of a large target and a small aperture under the condition that the focal length is fixed. Preferably, D / H / F≤0.5.

[0158] In the embodiment, the focal length value F1 of the first lens of the optical lens and the total focal length value F of the optical lens satisfy: |F1 / F|≤3. Satisfying the condition formula guarantees that the first lens is short-focus, which is beneficial to collect large field light into the rear optical system and fix the direction trend of the edge large-angle light, so as to realize higher energy collection. Preferably, |F1 / F|≤2.5.

[0159] In the embodiment, the focal length value F3 of the third lens of the optical lens and the overall focal length value F of the optical lens satisfy: |F3 / F|≤4. Satisfying the condition formula guarantees that the third lens is short-focus, which is conducive to controlling the light path between the second lens and the fourth lens, reducing aberration caused by large-angle light entering through the first lens, and making the optical lens structure more compact, which is conducive to ensuring miniaturization. Preferably, |F3 / F|≤3.5.

[0160] In the embodiment, the focal length value F4 of the fourth lens of the optical lens and the focal length value F5 of the fifth lens of the optical lens satisfy: |F4 / F5|≤3. Satisfying the condition formula guarantees that the focal length of the fourth lens is close to that of the fifth lens, which is helpful for the light to enter the fifth lens smoothly, reduces the system sensitivity, and is conducive to achieving higher energy collection. Preferably, |F4 / F5|≤2.5.

[0161] In the embodiment, the central thickness d2 of the second lens, the distance d23 from the image side of the second lens to the object side of the third lens, and the central thickness d3 of the third lens satisfy: 0.5≤(d2+d23+d3) / (d2+d3)≤2. Satisfying the condition formula guarantees that the distance between the second lens and the third lens is very close, and the sizes of the second lens and the third lens are relatively uniform, so that the optical lens as a whole is more compact. Preferably, 0.8≤(d2+d23+d3) / (d2+d3)≤1.5.

[0162] In the embodiment, the central thickness d3 of the third lens, the distance d34 from the image side of the third lens to the object side of the fourth lens, and the central thickness d4 of the fourth lens satisfy: 1.2≤(d3+d34+d4) / (d3+d4). Satisfying the condition formula guarantees that the distance between the third lens and the fourth lens is relatively far, which is conducive to the smooth transition of light and conducive to achieving higher energy collection. Preferably, 1.3≤(d3+d34+d4) / (d3+d4).

[0163] In the embodiment, the central thickness d4 of the fourth lens, the distance d45 from the image side of the fourth lens to the object side of the fifth lens, and the central thickness d5 of the fifth lens satisfy: 1.2≤(d4+d45+d5) / (d4+d5). Satisfying the condition formula guarantees that the distance between the fourth lens and the fifth lens is relatively far, which is conducive to the smooth transition of light and conducive to achieving higher energy collection. Preferably, 1.3≤(d4+d45+d5) / (d4+d5).

[0164] In the embodiment, the sagittal height SAG41 of the object side surface of the fourth lens of the optical lens satisfies 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|, and the sagittal height SAG42 of the image side surface of the fourth lens of the optical lens satisfies 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|. The fourth lens adopts a special-shaped lens, one side is flat, and the other side is curved, which is beneficial to compress light rays, realize small FNO, and reduce the system aperture. Preferably, 3.5≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|.

[0165] In the embodiment, the sagittal angle of the image side surface of the second lens of the optical lens at the maximum field angle of view satisfies and the sagittal angle of the object side surface of the third lens of the optical lens at the maximum field angle of view satisfies satisfies: Satisfying the condition formula ensures that the sagittal angle of the image side surface of the second lens is small, and the sagittal angle of the object side surface of the third lens is close, which ensures that the incident light rays are relatively flat when the light rays emitted from the second lens are incident to the object side surface of the third lens, thereby reducing the tolerance sensitivity of the optical lens. Preferably,

[0166] In the embodiment, the R value R8 of the object side surface of the fourth lens of the optical lens satisfies |R8 / R9|≤6.5, and the R value R9 of the image side surface of the fourth lens of the optical lens satisfies |R8 / R9|≤6.5. The fourth lens adopts a special-shaped lens, one side is flat, and the other side is curved, which is beneficial to compress light rays, realize small FNO, and reduce the system aperture. Preferably, |R8 / R9|≤6.2.

[0167] In the embodiment, the maximum half aperture D4 of the fourth lens of the optical lens satisfies 0.7≤|D4 / D5|≤1.15, and the maximum half aperture D5 of the fifth lens of the optical lens satisfies 0.7≤|D4 / D5|≤1.15. The fifth lens is curved to the object side, which is beneficial to reduce the aperture of the rear end of the optical lens, can make the maximum light passing half aperture of the fourth lens and the maximum light passing half aperture of the fifth lens close, thereby making the sizes of the two lenses uniform, and is beneficial to make the optical lens more compact. Preferably, 0.8≤|D4 / D5|≤1.1.

[0168] In the embodiment, the maximum half aperture D52 of the image side surface of the fifth lens of the optical lens satisfies 1≤D52 / (H / 2), and the image height H corresponding to the maximum field angle of view of the optical lens satisfies 1≤D52 / (H / 2). Satisfying the condition formula is helpful to realize small chief ray angle on the premise that the fifth lens is curved to the object side. Preferably, 1.1≤D52 / (H / 2).

[0169] In the embodiment, the optical back focal length of the optical lens, i.e., the center distance BFL from the image side center of the fifth lens of the optical lens to the imaging surface, the maximum field of view FOV of the optical lens, and the total optical length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the imaging surface of the optical lens, satisfy: 18≤BFL*FOV / TTL. Satisfying the condition, the fifth lens has positive focal power and is curved toward the object side at a large field of view, which is more conducive to achieving a long back focal length, and is conducive to assembly and is less likely to produce ghost images. Preferably, 19≤BFL*FOV / TTL.

[0170] Optionally, the optical lens described above can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0171] The optical lens in the present application can adopt multiple lenses, for example, the five lenses described above. In the present application, at least one of the lens surfaces of each lens is an aspherical lens surface. The aspherical lens has the characteristic that the curvature continuously changes from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and improving astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0172] In the exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focal length of the optical lens with temperature changes, thereby improving the system stability. At the same time, using glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, thereby affecting the normal use of the optical lens. For example, the optical lens with all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the image quality and reliability are focused on, the first lens to the fifth lens can all be glass aspherical lenses. Of course, in application scenarios with low temperature stability requirements, the first lens to the fifth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce the manufacturing cost. Of course, the first lens to the fifth lens in the optical lens can also be made of a combination of plastic and glass.

[0173] The present application also provides an electronic device comprising the optical lens described above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The electronic device can be a standalone imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0174] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although five lenses are described as an example in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0175] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0176] It should be noted that any of the examples one through eight below are applicable to all embodiments of this application.

[0177] Example 1

[0178] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0179] like Figure 1 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, filter L6, and imaging plane IMA.

[0180] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The filter L6 has an object-side surface S12 and an image-side surface S13. Light from the object passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0181] In this example, the total effective focal length F of the optical lens is 10.904mm, the maximum field of view (FOV) of the optical lens is 102.000°, and the total length (TTL) of the optical lens is 70.088mm.

[0182] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0183] Surf Radius Thickness Nd Vd 1 200.000 3.009 1.50 30.00 2 10.088 8.678 3 -10.000 5.483 1.40 20.00 4 -40.000 0.479 5 92.436 8.192 1.70 60.00 6 -30.000 5.183 7 Infinity 2.126 8 22.093 7.639 1.50 23.00 9 -80.000 9.642 10 -207.475 5.959 1.69 20.00 11 -19.377 9.323 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0184] Table 1

[0185] In Example 1, the surface shape of the aspherical lenses in the first lens L1 to the fifth lens L5 can be defined using, but is not limited to, the following aspherical formula:

[0186]

[0187] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, and E are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspherical lens surfaces S3, S4, S10, and S11 in Example 1.

[0188] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -1.254E+01 -2.959E-04 4.532E-06 -3.340E-08 -2.245E-10 2.693E-12 4 1.567E+01 -8.377E-05 8.069E-06 -1.886E-07 1.967E-09 -7.293E-12 10 1.000E+00 -3.416E-05 -8.913E-07 -1.213E-09 9.882E-11 -3.775E-13 11 -7.790E+00 -1.275E-04 9.017E-08 3.443E-09 -2.266E-11 1.259E-13

[0189] Table 2

[0190] Example 2

[0191] like Figure 2 The image shows an optical lens of Example 2 of this application. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples. Figure 2 A schematic diagram of the optical lens structure of Example 2 is shown.

[0192] like Figure 2 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, filter L6, and imaging plane IMA.

[0193] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The filter L6 has an object-side surface S12 and an image-side surface S13. Light from the object passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0194] In the present example, the total effective focal length F of the optical lens is 10.954 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total length TTL of the optical lens is 70.088 mm.

[0195] Table 3 shows the basic structure parameter table of the optical lens of Example Two, wherein the units of the radius of curvature Radius and the thickness / distance are millimeters (mm).

[0196]

[0197]

[0198] Table 3

[0199] Table 4 below shows the conic coefficient k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3, S4, S10, and S11 that can be used in Example Two.

[0200] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -5.554E+00 7.159E-05 -1.345E-06 9.955E-09 -5.797E-11 1.578E-12 4 3.077E+00 -1.287E-05 1.186E-06 -1.773E-08 5.531E-11 4.906E-13 10 1.000E+00 1.106E-05 -5.174E-07 -1.822E-09 1.128E-10 -6.366E-13 11 -5.880E+01 -1.745E-04 5.813E-07 7.945E-09 -3.173E-11 -1.090E-13

[0201] Table 4

[0202] Example Three

[0203] As shown in Figure 3 , the optical lens of Example Three of the present application is described. Figure 3 A schematic diagram of the optical lens structure of Example Three is shown.

[0204] As shown in Figure 3 , the optical lens comprises, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a filter L6, and an imaging surface IMA.

[0205] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a concave surface. The fifth lens L5 has a positive refractive power, the object side surface S10 of the fifth lens is a concave surface, and the image side surface S11 of the fifth lens is a convex surface. The filter L6 has an object side surface S12 and an image side surface S13 of the filter. Light from an object passes through each of the surfaces S1 to S13 in order and is finally imaged on the imaging surface IMA.

[0206] In this example, the total effective focal length F of the optical lens is 11.102mm, the maximum field of view (FOV) of the optical lens is 102.000°, and the total length (TTL) of the optical lens is 70.130mm.

[0207] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0208]

[0209]

[0210] Table 5

[0211] Table 6 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S3, S4, S10, and S11 in Example 3.

[0212] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 3.127E-01 -1.541E-04 2.241E-06 1.400E-08 3.387E-11 -6.172E-13 4 -7.674E+00 -6.069E-06 1.150E-07 1.319E-09 -6.865E-12 -8.303E-14 10 1.000E+00 -9.371E-05 -8.904E-08 -3.464E-09 3.213E-11 -2.215E-14 11 -2.928E+00 -7.579E-05 3.997E-08 -6.150E-10 9.269E-12 -1.574E-16

[0213] Table 6

[0214] Example 4

[0215] like Figure 4 As shown, the optical lens of Example 4 of this application is described. Figure 4 A schematic diagram of the optical lens structure of Example 4 is shown.

[0216] like Figure 4 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, filter L6, and imaging plane IMA.

[0217] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 has positive optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. The filter L6 has an object-side surface S12 and an image-side surface S13. Light from the object passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0218] In the present example, the total effective focal length F of the optical lens is 11.015 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total length TTL of the optical lens is 70.088 mm.

[0219] Table 7 shows the basic structure parameter table of the optical lens of Example Four, wherein the units of the radius of curvature Radius and the thickness / distance are millimeters (mm).

[0220] Surf Radius Thickness Nd Vd 1 68.169 3.071 1.50 30.00 2 8.760 11.923 3 -15.530 5.533 1.40 20.00 4 -41.179 0.479 5 151.107 7.109 1.70 60.00 6 -20.404 1.026 7 Infinity 5.552 8 21.496 7.639 1.50 23.00 9 150.000 8.012 10 -212.371 6.021 1.69 20.00 11 -18.934 9.350 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0221] Table 7

[0222] The following Table 8 shows the conic coefficient k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3, S4, S10, and S11 that can be used in Example Four.

[0223] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 1.285E+00 -4.568E-05 2.241E-06 1.400E-08 3.388E-11 -6.170E-13 4 -6.248E-01 6.280E-07 6.715E-07 1.502E-09 -2.152E-11 -2.371E-13 10 1.000E+00 -1.021E-04 -9.789E-08 -3.310E-09 2.988E-11 -5.616E-14 11 -3.380E+00 -7.246E-05 7.872E-09 -1.157E-09 7.052E-12 -2.626E-15

[0224] Table 8

[0225] Example Five

[0226] As shown in Figure 5 , the optical lens of Example Five of the present application is described. Figure 5 A schematic diagram of the optical lens structure of Example Five is shown.

[0227] As shown in Figure 5 , the optical lens comprises, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a filter L6, and an imaging surface IMA.

[0228] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a positive refractive power, the object side surface S10 of the fifth lens is a concave surface, and the image side surface S11 of the fifth lens is a convex surface. The filter L6 has an object side surface S12 and an image side surface S13 of the filter. Light from an object passes through the surfaces S1 to S13 in order and is finally imaged on the imaging surface IMA.

[0229] In the present example, the total effective focal length F of the optical lens is 11.015 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total length TTL of the optical lens is 70.088 mm.

[0230] Table 9 shows the basic structure parameter table of the optical lens of Example Five, wherein the units of the radius of curvature Radius and the thickness / distance are millimeter (mm).

[0231] Surf Radius Thickness Nd Vd 1 70.000 3.009 1.50 30.00 2 10.089 12.008 3 -9.486 5.483 1.40 20.00 4 -25.000 0.479 5 92.436 7.059 1.70 60.00 6 -17.574 0.962 7 Infinity 5.500 8 -150.000 7.639 1.50 23.00 9 -25.248 8.192 10 -219.057 5.959 1.69 20.00 11 -21.050 9.422 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0232] Table 9

[0233] The following Table 10 shows the conic coefficient k and each high order term coefficient A, B, C, D, E of the aspherical lens surface S3, S4, S10, and S11 which can be used in Example Five.

[0234] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -2.835E+00 -1.007E-05 -1.350E-07 -7.998E-09 -6.698E-11 -9.593E-14 4 -1.000E-01 2.421E-04 -3.580E-07 -5.308E-09 -1.926E-11 -2.284E-14 10 1.000E+00 -8.500E-05 -1.373E-08 -9.739E-10 4.601E-11 -1.753E-13 11 -2.118E+00 -6.239E-05 7.183E-08 -1.402E-09 1.905E-11 -2.841E-14

[0235] Table 10

[0236] Example Six

[0237] As shown in Figure 6 , the optical lens of Example Six of the present application is described. Figure 6 A schematic diagram showing the structure of the optical lens of Example Six is shown.

[0238] As shown in Figure 6 , the optical lens comprises, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a filter L6, and an imaging plane IMA.

[0239] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a positive refractive power, the object side surface S10 of the fifth lens is a concave surface, and the image side surface S11 of the fifth lens is a convex surface. The filter L6 has an object side surface S12 and an image side surface S13 of the filter. Light from an object passes through each surface S1 to S13 in order and is finally imaged on the imaging plane IMA.

[0240] In the present example, the total effective focal length F of the optical lens is 11.122 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total track length TTL of the optical lens is 70.086 mm.

[0241] Table 11 shows the basic structure parameter table of the optical lens of Example Six, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeter (mm).

[0242] Surf Radius Thickness Nd Vd 1 70.025 3.010 1.50 30.00 2 10.089 12.010 3 -9.487 5.482 1.40 20.00 4 -25.006 0.479 5 80.000 7.059 1.70 60.00 6 -17.577 0.962 7 Infinity 5.500 8 -150.046 7.639 1.50 23.00 9 -25.248 8.192 10 -219.390 5.959 1.69 20.00 11 -21.031 9.419 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0243] Table 11

[0244] The following Table 12 shows the conic coefficient k and each high order term coefficient A, B, C, D, E of the aspherical lens surface S3, S4, S10, and S11 which can be used in Example Six.

[0245] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -2.835E+00 -1.007E-05 -1.350E-07 -7.998E-09 -6.698E-11 -9.593E-14 4 -1.000E-01 2.421E-04 -3.580E-07 -5.307E-09 -1.926E-11 -2.284E-14 10 1.000E+00 -8.086E-05 2.065E-08 -1.856E-09 4.475E-11 -1.434E-13 11 -2.045E+00 -6.363E-05 7.910E-08 -1.182E-09 1.977E-11 -3.575E-14

[0246] Table 12

[0247] Example Seven

[0248] As shown in Figure 7 , the optical lens of Example Seven of the present application is described. Figure 7 A schematic diagram showing the structure of the optical lens of Example Seven is shown.

[0249] As shown in Figure 7 , the optical lens comprises, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a filter L6, and an imaging plane IMA.

[0250] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a concave surface. The fifth lens L5 has a positive refractive power, the object side surface S10 of the fifth lens is a concave surface, and the image side surface S11 of the fifth lens is a convex surface. The filter L6 has an object side surface S12 and an image side surface S13 of the filter. Light from an object passes through each surface S1 to S13 in order and is finally imaged on the imaging plane IMA.

[0251] In the present example, the total effective focal length F of the optical lens is 11.088 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total track length TTL of the optical lens is 70.088 mm.

[0252] Table 13 shows the basic structure parameter table of the optical lens of Example Seven, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeter (mm).

[0253] Surf Radius Thickness Nd Vd 1 70.000 3.009 1.50 30.00 2 10.127 12.130 3 -13.248 5.483 1.40 20.00 4 -37.671 0.479 5 -90.000 7.059 1.70 60.00 6 -16.454 2.151 7 Infinity 4.565 8 19.889 7.639 1.50 23.00 9 100.000 7.941 10 -207.475 5.959 1.69 20.00 11 -18.779 9.298 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0254] Table 13

[0255] The following Table 14 shows the conic constant k and the respective higher order coefficients A, B, C, D, E of the aspherical lens surfaces S3, S4, S10, and S11 which can be used in Example Seven.

[0256]

[0257]

[0258] Table 14

[0259] Example Eight

[0260] As shown in Figure 8 , an optical lens of Example Eight of the present application is described. Figure 8 A schematic view showing the optical lens structure of Example Eight is shown.

[0261] As shown in Figure 8 , the optical lens comprises, in order from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a filter L6, and an image plane IMA.

[0262] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is convex. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is concave, and the image side surface S11 of the fifth lens is convex. The filter L6 has an object side surface S12 and an image side surface S13. Light from an object passes through the surfaces S1 to S13 in order and is finally imaged on the image plane IMA.

[0263] In the present example, the total effective focal length F of the optical lens is 10.878 mm, the maximum field of view FOV of the optical lens is 102.000°, and the total track length TTL of the optical lens is 70.088 mm.

[0264] Table 15 shows the basic structure parameter table of the optical lens of Example Eight, wherein the units of the curvature radius Radius and the thickness Thickness / Distance are millimeter (mm).

[0265] Surf Radius Thickness Nd Vd 1 70.000 3.009 1.50 30.00 2 9.935 12.272 3 -13.397 5.483 1.40 20.00 4 -32.807 0.479 5 -90.000 7.059 1.70 60.00 6 -15.568 1.134 7 Infinity 5.533 8 25.000 7.639 1.50 23.00 9 100.000 7.848 10 -207.475 5.959 1.69 20.00 11 -17.005 9.298 12 Infinity 2.423 1.52 64.20 13 Infinity 1.952 IMA Infinity

[0266] Table 15

[0267] The following Table 16 shows the conic constant k and the respective higher order coefficients A, B, C, D, E for the aspherical lens surfaces S3, S4, S10, and S11 used in Example Eight.

[0268] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -1.278E-01 7.346E-05 -1.051E-06 -2.228E-09 2.855E-10 -3.743E-12 4 -9.800E+00 7.836E-05 9.566E-08 -1.475E-09 -2.970E-11 2.167E-13 10 1.000E+00 -5.766E-05 1.532E-07 -2.917E-09 3.215E-11 -7.016E-14 11 -3.624E+00 -6.462E-05 1.799E-07 -8.375E-10 4.197E-12 2.435E-14

[0269] Table 16

[0270] In summary, Examples One through Eight satisfy the relationships shown in Table 17, respectively.

[0271]

[0272] Table 17

[0273] Table 18 gives the effective focal length F of the optical lens, the effective focal lengths Fl to F5 of the respective lenses, etc. for Examples One through Eight.

[0274]

[0275]

[0276] Table 18

[0277] Obviously, the above-described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application, without creative effort, shall fall within the scope of the present application.

[0278] It is to be noted that the terms used herein are merely for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components, and / or combinations thereof.

[0279] It should be noted that the terms "first", "second", and the like, used in the specification and the appended claims, are used to distinguish between similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so construed can be interchanged, under appropriate circumstances, to describe the embodiments of the application.

[0280] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An optical lens characterized in that, The optical lens has five lenses with optical power, and sequentially comprises, along the optical axis from the object side to the image side: a first lens having negative optical power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens having negative optical power, the object side surface of the second lens being concave, and the image side surface of the second lens being convex; a third lens having positive optical power, the image side surface of the third lens being convex; a fourth lens having positive optical power, at least one of the object side surface and the image side surface of the fourth lens being convex; a fifth lens having positive optical power, the object side surface of the fifth lens being concave, and the image side surface of the fifth lens being convex; the radius of curvature R51 of the object side surface of the fifth lens of the optical lens and the focal length F5 of the fifth lens of the optical lens satisfy: -7.478≤R51 / F5≤-3; the optical back focal length of the optical lens, i.e. the distance BFL from the center of the image side of the fifth lens of the optical lens to the center of the imaging surface, the maximum field of view FOV of the optical lens, and the total optical length TTL of the optical lens, i.e. the distance from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 18≤BFL*FOV / TTL≤20.

614.

2. The optical lens of claim 1, wherein, The object side surface of the third lens is convex.

3. The optical lens of claim 1, wherein, The object side surface of the third lens is concave.

4. The optical lens of claim 1, wherein, The object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

5. The optical lens of claim 1, wherein, The object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave.

6. The optical lens of claim 1, wherein, The object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex.

7. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm arranged between the third lens and the fourth lens.

8. The optical lens of claim 1, wherein, The second lens and / or the fifth lens is an aspherical lens.

9. The optical lens of any of claims 1 to 8, wherein, The total optical length TTL of the optical lens, i.e. the distance from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the total focal length F of the optical lens satisfy: 6.301≤TTL / F≤8.

10. The optical lens of any of claims 1 to 8, wherein, The focal length F5 of the fifth lens of the optical lens and the total focal length F of the optical lens satisfy: 1≤F5 / F≤3.

389.

11. The optical lens of any of claims 1 to 8, wherein, The maximum entrance pupil D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.

03.

12. The optical lens of any of claims 1 to 8, wherein, The maximum entrance pupil D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.71≤D / H / θ≤1.

3.

13. The optical lens of any of claims 1 to 8, wherein, An optical total length of the optical lens, i.e., a center distance TTL from a center of an object side of the first lens of the optical lens to an imaging surface of the optical lens, an image height H corresponding to a maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: 0.035≤TTL / H / FOV≤0.

04.

14. The optical lens of any of claims 1 to 8, wherein, An optical total length of the optical lens, i.e., a center distance TTL from a center of an object side of the first lens of the optical lens to an imaging surface of the optical lens, an image height H corresponding to a maximum field of view angle of the optical lens, and an arc value θ of the maximum field of view angle of the optical lens satisfy: 1.987≤TTL / H / θ≤3.

15. The optical lens of any of claims 1 to 8, wherein, An optical total length of the optical lens, i.e., a center distance TTL from a center of an object side of the first lens of the optical lens to an imaging surface of the optical lens, and a maximum half diameter DMAX of the first lens to the fifth lens satisfy: 4.455≤TTL / DMAX≤6.

16. The optical lens of any of claims 1 to 8, wherein, An entire focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: 1.4≤F / EPD≤1.

6.

17. The optical lens of any of claims 1 to 8, wherein, A half diameter Dstop of a stop of the optical lens, a maximum half diameter D2 of the second lens of the optical lens, a maximum half diameter D3 of the third lens of the optical lens, a maximum half diameter D4 of the fourth lens of the optical lens, and a maximum field of view angle FOV of the optical lens satisfy: 75≤Dstop / MAX(D2,D3,D4)*FOV≤82.

125.

18. The optical lens of any of claims 1 to 8, wherein, A maximum passing light diameter D of an object side of the first lens corresponding to a maximum field of view angle of the optical lens, an image height H corresponding to the maximum field of view angle of the optical lens, and an entire focal length value F of the optical lens satisfy: 0.130≤D / H / F≤0.

5.

19. The optical lens of any of claims 1 to 8, wherein, A focal length value F1 of the first lens of the optical lens and an entire focal length value F of the optical lens satisfy: 1.881≤|F1 / F|≤2.

5.

20. The optical lens of any of claims 1 to 8, wherein, A focal length value F3 of the third lens of the optical lens and an entire focal length value F of the optical lens satisfy: 1.939≤|F3 / F|≤4.

21. The optical lens of any of claims 1 to 8, wherein, A focal length value F4 of the fourth lens of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: 1.148≤|F4 / F5|≤3.

22. The optical lens of any of claims 1 to 8, wherein, A center thickness d2 of the second lens, a distance d23 from an image side of the second lens to an object side of the third lens, and a center thickness d3 of the third lens satisfy: 0.8≤(d2+d23+d3) / (d2+d3)≤1.

5.

23. The optical lens of any of claims 1 to 8, wherein, A center thickness d3 of the third lens, a distance d34 from an image side of the third lens to an object side of the fourth lens, and a center thickness d4 of the fourth lens satisfy: 1.2≤(d3+d34+d4) / (d3+d4)≤1.

462.

24. The optical lens of any of claims 1 to 8, wherein, A center thickness d4 of the fourth lens, a distance d45 from an image-side surface of the fourth lens to an object-side surface of the fifth lens, and a center thickness d5 of the fifth lens satisfy: 1.2≤(d4+d45+d5) / (d4+d5)≤1.

709.

25. The optical lens of any of claims 1 to 8, wherein, A sagittal height SAG41 of the object-side surface of the fourth lens of the optical lens and a sagittal height SAG42 of the image-side surface of the fourth lens of the optical lens satisfy: 3≤|max(|SAG41|,|SAG42|) / min(|SAG41|,|SAG42|)|≤7.

797.

26. The optical lens of any of claims 1 to 8, wherein, an angle of view of the image side of the second lens of the optical lens at a maximum field angle an angle of view of the object side of the third lens of the optical lens at a maximum field angle satisfies:

27. The optical lens of any of claims 1 to 8, wherein, An R value R8 of the object-side surface of the fourth lens of the optical lens and an R value R9 of the image-side surface of the fourth lens of the optical lens satisfy: 0.143≤|R8 / R9|≤6.

5.

28. The optical lens of any of claims 1 to 8, wherein, A maximum half aperture D4 of the fourth lens of the optical lens and a maximum half aperture D5 of the fifth lens of the optical lens satisfy: 0.7≤|D4 / D5|≤1.

15.

29. The optical lens of any of claims 1 to 8, wherein, A maximum half aperture D52 of the image-side surface of the fifth lens of the optical lens and an image height H corresponding to a maximum field angle of the optical lens satisfy: 1≤D52 / (H / 2)≤1.

278.

30. An electronic device, comprising: An imaging device for converting an optical image formed by the optical lens into an electric signal.

Images