Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens with negative optical power, a first side of the first lens being a convex surface, and a second side of the first lens being a concave surface; a second lens with negative optical power, a first side of the second lens being a convex surface, and a second side of the second lens being a concave surface; a third lens with positive optical power, at least one of a first side and a second side of the third lens being a convex surface; a fourth lens with negative optical power, a first side of the fourth lens being a convex surface, and a second side of the fourth lens being a concave surface; a fifth lens with positive optical power, a first side of the fifth lens being a convex surface, and a second side of the fifth lens being a convex surface; and a sixth lens with positive optical power, at least one of a first side and a second side of the sixth lens being a convex surface. The application solves the problem that the optical lens in the prior art is difficult to simultaneously consider miniaturization, high resolution, large angle resolution and ghost image elimination.

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 automatic driving function is increasingly mature, and the optical lens, as a key component of the automatic driving auxiliary system, plays an important role. There are various types of optical lenses, for example, vehicle-mounted lenses. At present, the design of vehicle-mounted lenses tends to be small in size and high in resolution, and at the same time, in order to achieve clear identification in a weak light environment, the vehicle-mounted lenses also need a larger aperture. In addition, in order to meet the requirements of safe driving, the vehicle-mounted lenses need to achieve the feature of no ghost image to prevent the automatic driving auxiliary system from misjudging the current road conditions.

[0003] Compared with ordinary optical lenses, vehicle-mounted lenses in the automatic driving auxiliary system have more special requirements. For example, it is required to have strong light transmission capability in order to adapt to the relatively dark environment at night or in rainy days; in order to achieve the effect of reducing cost and lightening, the vehicle-mounted lenses usually use plastic lenses, but the thermal expansion and contraction characteristics of plastic lenses are difficult to overcome, which leads to the best image plane deviating from the chip at high and low temperatures of-40℃ to 120℃, resulting in unclear images and other adverse effects; and the high plasticization system has poor thermal stability, and after recovering from high temperature to normal temperature, the resolution cannot meet the requirements. Although a vehicle-mounted lens in the prior art can achieve a clarity of one million pixels, the lens has serious problems of light transmission capability, chromatic aberration, astigmatism, distortion and other aberrations, and cannot simultaneously meet the requirements of small front aperture and miniaturization. The prior art also provides a long-focus lens, but the long-focus lens cannot balance the large-angle resolution and has the problems of low environmental object recognition and small central part detection area. Therefore, it is very urgent to design an optical lens that can simultaneously meet the above requirements of miniaturization, high resolution, no ghost image, and relatively clear imaging at high and low temperatures.

[0004] That is, the optical lens in the prior art has the problem that miniaturization, high resolution, large-angle resolution and no ghost image are difficult to balance 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 is difficult to balance miniaturization, high resolution, large-angle resolution and no ghost image simultaneously.

[0006] In order to achieve the above object, 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 having negative refractive power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having negative refractive power, a first side surface of the second lens being convex, and a second side surface of the second lens being concave; a third lens having positive refractive power, at least one of a first side surface and a second side surface of the third lens being convex; a fourth lens having negative refractive power, a first side surface of the fourth lens being convex, and a second side surface of the fourth lens being concave; a fifth lens having positive refractive power, a first side surface of the fifth lens being convex, and a second side surface of the fifth lens being convex; and a sixth lens having positive refractive power, at least one of a first side surface and a second side surface of the sixth lens being convex.

[0007] Further, the first side surface of the third lens is convex, and the second side surface of the third lens is convex.

[0008] Further, the first side surface of the third lens is concave, and the second side surface of the third lens is convex.

[0009] Further, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0010] Further, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0011] Further, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

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

[0013] Further, the first lens is an aspherical lens and / or the sixth lens is an aspherical lens.

[0014] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0015] Further, the total optical length of the optical lens, i.e., the distance TTL 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, 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: TTL / H / FOV≤0.05.

[0016] Further, the total optical length of the optical lens, i.e., the distance TTL 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, 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: TTL / H / FOV≤0.05.

[0017] Further, a center curvature radius R11 of the first side surface of the first lens of the optical lens and a center curvature radius R12 of the second side surface of the first lens of the optical lens satisfy: 1.5≤R11 / R12≤2.5.

[0018] Further, a center distance TTL from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens, i.e., an overall optical length of the optical lens, and an overall focal length value F of the optical lens satisfy: TTL / F≤5.

[0019] Further, a center curvature radius R21 of the first side surface of the second lens of the optical lens, a center curvature radius R22 of the second side surface of the second lens of the optical lens, and an overall focal length value F of the optical lens satisfy: F / R21+F / R22≤2.2.

[0020] Further, a maximum light passing aperture D of the first side surface 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 arc value θ of the maximum field of view angle FOV of the optical lens satisfy: D / H / θ≤1.147.

[0021] Further, a maximum light passing aperture D of the first side surface 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 arc value θ of the maximum field of view angle FOV of the optical lens satisfy: D / H / θ≤1.147.

[0022] 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: -5≤F4 / F5<0.

[0023] Further, a center curvature radius R41 of the first side surface of the fourth lens of the optical lens and a center curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy: 1.3≤R41 / R42≤2.5.

[0024] Further, a focal length value F2 of the second lens of the optical lens and an overall focal length value F of the optical lens satisfy: -6≤F2 / F≤-2.5.

[0025] Further, a center curvature radius R61 of the first side surface of the sixth lens of the optical lens and a center curvature radius R62 of the second side surface of the sixth lens of the optical lens satisfy: -13≤(R61-R62) / (R61+R62)≤1.2.

[0026] Further, a focal length value F4 of the fourth lens of the optical lens, a focal length value F5 of the fifth lens of the optical lens, and an overall focal length value F of the optical lens satisfy: -20≤F4*F5 / F≤-8.

[0027] Further, the optical total track length of the optical lens, i.e. the distance from the center of the object side of the first lens to the center of the image plane of the optical lens, TTL, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 3.3≤TTL / H≤5.

[0028] Further, the maximum field angle FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 70≤(FOV×F) / H.

[0029] Further, the overall focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0030] Further, the distance d2 from the center of the first side of the second lens to the center of the second side of the second lens of the optical lens and the optical total track 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 image plane of the optical lens satisfy: 0.04≤d2 / TTL≤0.1.

[0031] Further, the radius of curvature R21 of the first side of the second lens of the optical lens, the distance d2 from the center of the first side of the second lens to the center of the second side of the second lens, and the radius of curvature R22 of the second side of the second lens of the optical lens satisfy: 1≤(R21+d2) / R22≤3.

[0032] Further, the maximum field angle under the lens edge slope K(S1) of the first side of the first lens of the optical lens satisfies: arctan(1 / K(S1))≥20; and the maximum field angle under the lens edge slope K(S2) of the second side of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥33.

[0033] Further, the overall focal length value F of the optical lens, the focal length value F1 of the first lens of the optical lens, and the focal length value F2 of the second lens of the optical lens satisfy: 25≤F1*F2 / F≤85.

[0034] Further, the optical total track length of the optical lens, i.e. the distance from the center of the object side of the first lens to the center of the image plane of the optical lens, TTL, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 3.3≤TTL / H≤5.

[0035] Further, the overall focal length value F of the optical lens and the focal length value F1 of the first lens of the optical lens satisfy: -3≤F1 / F<0.

[0036] Further, the combined focal length value F45 of the fourth lens and the fifth lens of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2≤F45 / F2<0.

[0037] Further, a curvature radius R21 of a first side surface of the second lens of the optical lens satisfies: 0.05≤R21 / TTL, where TTL is a total track length of the optical lens, i.e., a center distance from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens.

[0038] Further, a curvature radius R41 of a first side surface of the fourth lens of the optical lens satisfies: 0.05≤R41 / TTL, where TTL is a total track length of the optical lens, i.e., a center distance from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens.

[0039] According to another aspect of the present application, there is provided an optical lens comprising, in order from an object side to an image side along an optical axis: a first lens having a negative focal power; a second lens having a negative focal power; a third lens having a positive focal power; a fourth lens having a negative focal power; a fifth lens having a positive focal power; and a sixth lens having a positive focal power; wherein a curvature radius R21 of a first side surface of the second lens of the optical lens satisfies: 0.05≤R21 / TTL, where TTL is a total track length of the optical lens, i.e., a center distance from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens.

[0040] Further, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0041] Further, the first side surface of the second lens is convex, and the second side surface of the second lens is concave.

[0042] Further, the first side surface of the third lens is convex, and the second side surface of the third lens is convex.

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

[0044] Further, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave.

[0045] Further, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex.

[0046] Further, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0047] Further, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0048] Further, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

[0049] Further, the optical lens further comprises a diaphragm, the diaphragm is arranged between the third lens and the fourth lens.

[0050] Further, the first lens is an aspherical lens and / or the sixth lens is an aspherical lens.

[0051] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0052] Further, 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 of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.05.

[0053] Further, 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 of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.05.

[0054] Further, the center curvature radius R11 of the first side surface of the first lens of the optical lens and the center curvature radius R12 of the second side surface of the first lens of the optical lens satisfy: 1.5≤R11 / R12≤2.5.

[0055] Further, 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 total focal length value F of the optical lens satisfy: TTL / F≤5.

[0056] Further, the center curvature radius R21 of the first side surface of the second lens of the optical lens, the center curvature radius R22 of the second side surface of the second lens of the optical lens, and the total focal length value F of the optical lens satisfy: F / R21+F / R22≤2.2.

[0057] Further, the maximum light passing aperture D of the first 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≤0.02.

[0058] Further, the maximum light passing aperture D of the first 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≤0.02.

[0059] Further, 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: -5≤F4 / F5<0.

[0060] Further, a center curvature radius R41 of the first side surface of the fourth lens of the optical lens and a center curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy: 1.3≤R41 / R42≤2.5.

[0061] Further, a focal length value F2 of the second lens of the optical lens and a total focal length value F of the optical lens satisfy: -6≤F2 / F≤-2.5.

[0062] Further, a center curvature radius R61 of the first side surface of the sixth lens of the optical lens and a center curvature radius R62 of the second side surface of the sixth lens of the optical lens satisfy: -13≤(R61-R62) / (R61+R62)≤1.2.

[0063] Further, a focal length value F4 of the fourth lens of the optical lens, a focal length value F5 of the fifth lens of the optical lens and a total focal length value F of the optical lens satisfy: -20≤F4*F5 / F≤-8.

[0064] Further, a total focal length value F of the optical lens and an image height H corresponding to a maximum field angle of the optical lens satisfy: 0

[0065] Further, a maximum field angle FOV of the optical lens, a total focal length value F of the optical lens and an image height H corresponding to the maximum field angle of the optical lens satisfy: 70≤(FOV×F) / H.

[0066] Further, a total focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0067] Further, a distance d2 from a center of the first side surface of the second lens to a center of the second side surface of the second lens of the optical lens and a total optical length of the optical lens, i.e. a distance TTL from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens satisfy: 0.04≤d2 / TTL≤0.1.

[0068] Further, a center curvature radius R41 of the first side surface of the fourth lens of the optical lens and a center curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy: 1.3≤R41 / R42≤2.5.

[0069] Furthermore, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies: arctan(1 / K(S1))≥20; the lens edge slope K(S2) at the maximum field of view angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥33.

[0070] Furthermore, the focal length value F of the entire optical lens group, the focal length value F1 of the first lens of the optical lens, and the focal length value F2 of the second lens of the optical lens satisfy: 25≤F1*F2 / F≤85.

[0071] Furthermore, the total optical length of the optical lens, that is, the distance TTL 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 image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 3.3≤TTL / H≤5.

[0072] Furthermore, the focal length value F of the entire optical lens set and the focal length value F1 of the first lens of the optical lens satisfy: -3≤F1 / F<0.

[0073] Furthermore, the combined focal length value F45 of the fourth lens and the fifth lens of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2≤F45 / F2<0.

[0074] Furthermore, a curvature radius R41 of the first side surface of the fourth lens of the optical lens and the total optical length of the optical lens, that is, a 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, satisfy the following relationship: 0.05≤R41 / TTL.

[0075] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0076] According to the technical solution of the present invention, the optical lens comprises, 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, a fifth lens and a sixth lens, wherein the first lens has negative optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave; the second lens has negative optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is concave; the third lens has positive optical power, and at least one of the first side surface and the second side surface of the third lens is convex; the fourth lens has negative optical power, a first side surface of the fourth lens is convex, and a second side surface of the fourth lens is concave; the fifth lens has positive optical power, a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is convex; and the sixth lens has positive optical power, and at least one of the first side surface and the second side surface of the sixth lens is convex.

[0077] The first lens has negative focal power, the first side of the first lens is convex, and the second side of the first lens is concave; in this way, the first lens can collect as much light as possible into the rear optical system, and the direction trend of the light at the fixed edge is large. The first lens preferably uses a high refractive index material, which is conducive to the reduction of the front aperture, thereby improving the imaging quality. The first side of the first lens is designed to be convex, which is conducive to the sliding of water droplets in practical applications, thereby reducing the influence on imaging. The second lens has negative focal power, which is conducive to the smooth entry of light into the rear optical system, adjustment of light, reduction of chromatic aberration, reduction of total length, and smooth transition of light, while making the light as much as possible. The first side of the second lens is convex, so that the second lens can collect as much light as possible from the second side of the first lens, thereby entering the rear optical system and realizing a large field of view. The second side of the second lens is concave, which is matched with the third lens having positive focal power, so that the aperture is larger, which is conducive to realizing a small FNO. The third lens has positive focal power, and at least one of the first side and the second side of the third lens is convex; in this way, the light can be converged, and the divergent light can smoothly enter the rear after the third lens, thereby further making the light transition smooth.

[0078] The fourth lens has negative focal power, the first side of the fourth lens is convex, which is conducive to the reduction of the height of the light entering the fourth lens, and the reduction of the overall sensitivity of the fourth lens and the fifth lens, and the second side of the fourth lens is concave, which is conducive to cooperation with the fifth lens. The fifth lens has positive focal power, and by reasonably distributing the focal power of the fifth lens and the fourth lens, the imaging stability at high and low temperatures can be maintained. The first side of the fifth lens is convex, which is conducive to cooperation with the fourth lens, and at the same time, the light converged by the fourth lens with negative focal power can enter the rear lens smoothly, thereby improving the resolving power of the optical lens. The second side of the fifth lens is convex, which is conducive to the reduction of the height of the light entering the sixth lens, and the reduction of the sensitivity of the sixth lens, and at the same time, the sixth lens with positive focal power makes the light converge to the imaging surface, reduces the total length of the system, and ensures miniaturization. The sixth lens has positive focal power, which can magnify the light passing through the fourth lens and the fifth lens to the imaging surface, thereby reducing the total length of the system. BRIEF DESCRIPTION OF DRAWINGS

[0079] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0080] Figure 1 A structure schematic diagram of an optical lens of example one of the present application is shown;

[0081] Figure 2 A structure schematic diagram of an optical lens of example two of the present application is shown.

[0082] Figure 3 A structural schematic diagram of an optical lens of Example Three of the present application is shown.

[0083] Figure 4 A structural schematic diagram of an optical lens of Example Four of the present application is shown.

[0084] Figure 5 A structural schematic diagram of an optical lens of Example Five of the present application is shown.

[0085] Figure 6 A structural schematic diagram of an optical lens of Example Six of the present application is shown.

[0086] Figure 7 A structural schematic diagram of an optical lens of Example Seven of the present application is shown.

[0087] Figure 8 A structural schematic diagram of an optical lens of Example Eight of the present application is shown.

[0088] Wherein, the above-mentioned drawings include the following reference signs:

[0089] L1, first lens; S1, first side of the first lens; S2, second side of the first lens; L2, second lens; S3, first side of the second lens; S4, second side of the second lens; L3, third lens; S5, first side of the third lens; S6, second side of the third lens; STO, stop; L4, fourth lens; S8, first side of the fourth lens; S9, second side of the fourth lens; L5, fifth lens; S9, first side of the fifth lens; S10, second side of the fifth lens; L6, sixth lens; S11, first side of the sixth lens; S12, second side of the sixth lens; L7, filter;

[0090] S13, first side of the filter; S14, second side of the filter; S15, first side of the protective glass; S16, second side of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0091] It should be noted that the embodiments and the features in 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 drawings and in combination with the embodiments.

[0092] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the present application belongs.

[0093] In the present disclosure, the terms "upper", "lower", "top", "bottom", etc. are used for the purpose of illustration and description only and are not intended to limit the present disclosure unless otherwise specifically indicated. Similarly, "inner" and "outer" are used for the purpose of illustration and description only and are not intended to limit the present disclosure unless otherwise specifically indicated.

[0094] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one feature from another and do not imply any limitation on the features. Thus, a first lens discussed below can also be referred to as a second lens or a third lens without departing from the teachings of the present disclosure.

[0095] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for the purpose of illustration. 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.

[0096] In the present disclosure, the near-axis 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 near-axis 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 near-axis region. The surface of each lens near the object side is the first side of the lens, and the surface of each lens near the image side is the second side of the lens. The judgment of the surface shape in the near-axis 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 near-axis 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 first side, 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 second side, 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.

[0097] In an exemplary embodiment, the optical lens provided by the present disclosure can be used as, for example, a vehicle-mounted lens. At this time, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0098] In an exemplary embodiment, the optical lens provided by the present disclosure can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is the image source surface of the optical lens.

[0099] In order to solve the problem in the prior art that miniaturization, high resolution, large angular resolution and ghost-free are difficult to achieve at the same time in optical lenses, the present invention provides an optical lens and an electronic device.

[0100] Example 1

[0101] like Figures 1 to 8 As shown, the optical lens includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the second lens has negative optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave; the third lens has positive optical power, and at least one of the first side surface and the second side surface of the third lens is convex; the fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; the fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex; the sixth lens has positive optical power, and at least one of the first side surface and the second side surface of the sixth lens is convex.

[0102] The first lens has negative optical power, with its first side being convex and its second side being concave. This arrangement allows the first lens to collect as much light as possible from a wide field of view into the rear optical system, while also stabilizing the direction of light from wide angles at the edge. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture diameter and thus improves image quality. The convex design of the first side of the first lens facilitates the shedding of water droplets in practical applications, minimizing their impact on imaging. The second lens has negative optical power, which facilitates smooth light entry into the rear optical system, aligning the light, reducing chromatic aberration, and reducing the total length of divergent light, ensuring a smooth transition. It also maximizes the entry of wide-angle light, improving illumination. The convex first side of the second lens allows the second lens to collect as much light as possible from the second side of the first lens into the rear optical system, achieving a wide field of view. The concave second side of the second lens, combined with the positive-power third lens, increases the aperture diameter, facilitating a low FNO. The third lens has positive focal power, and at least one of the first side surface and the second side surface of the third lens is a convex surface; this arrangement is conducive to light convergence, so that the divergent light can smoothly enter the rear after passing through the third lens, further ensuring a smooth transition of the light trend.

[0103] The fourth lens has negative focal power, the first side surface of the fourth lens is convex, which is beneficial to reduce the height of the light entering the fourth lens, reduce the overall sensitivity of the fourth lens and the fifth lens, and the second side surface of the fourth lens is concave, which is beneficial to cooperate with the fifth lens. The fifth lens has positive focal power, and by reasonably distributing the focal power of the fifth lens and the fourth lens, the imaging stability at high and low temperatures can be maintained. The first side surface of the fifth lens is convex, which is beneficial to cooperate with the fourth lens, and at the same time, the light converging by the fourth lens with negative focal power can enter the rear lens gently, thereby improving the resolving power of the optical lens. The second side surface of the fifth lens is convex, which is beneficial to reduce the height of the light entering the sixth lens, reduce the sensitivity of the sixth lens, and at the same time, cooperate with the sixth lens with positive focal power to make the light converge to the imaging surface, thereby reducing the total length of the system and ensuring miniaturization. The sixth lens has positive focal power, can magnify the light passing through the fourth lens and the fifth lens to the imaging surface, and reduce the total length of the system.

[0104] In addition, the optical lens of the present application uses 6 lenses, which can achieve more than one million pixels and realize higher clarity. By optimizing the lens shape, reasonably distributing the focal power, reducing the front aperture, shortening the TTL, ensuring the miniaturization of the optical lens, and improving the resolving power to realize a large aperture. By reasonably matching the curvature, spacing and back focus of each lens, ghost images are eliminated. The optical lens of the present application adopts a full-glass structure, reasonably matches lenses with different refractive index temperature coefficients, and can still clearly image at high and low temperature environments, greatly improving the safety of automatic driving. At the same time, the optical lens of the present application has a long focal length, and the central region has a large angular resolution, which can improve the environmental object recognition degree and specifically increase the central part of the detection area.

[0105] In the present embodiment, the first side surface of the third lens is convex, and the second side surface of the third lens is convex. The third lens has a positive focal length, which is beneficial to light convergence, and the second side surface of the third lens is convex and the lens shape is gentle, so that the divergent light can smoothly enter the rear, and the light trend is further smoothly transitioned.

[0106] In the present embodiment, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens has a positive focal length, which is beneficial to light convergence, and the second side surface of the third lens is convex and the lens shape is gentle, so that the divergent light can smoothly enter the rear, and the light trend is further smoothly transitioned.

[0107] In the present embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens has positive focal power, can magnify the light passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, select an aspherical lens to correct astigmatism and field curvature, and realize high resolution. At the same time, the surface shape of the sixth lens is reasonably planned, which is beneficial to the gentle transition of the light to the imaging surface.

[0108] In the embodiment, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface. The sixth lens has a positive focal power, can magnify the light passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, correct astigmatism and field curvature by using an aspherical lens, and realize high resolution. Meanwhile, the surface type of the sixth lens is reasonably planned, which is beneficial to the smooth transition of the light to the imaging surface.

[0109] In the embodiment, the first side surface of the sixth lens is a concave surface, and the second side surface of the sixth lens is a convex surface. The sixth lens has a positive focal power, can magnify the light passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, correct astigmatism and field curvature by using an aspherical lens, and realize high resolution. Meanwhile, the surface type of the sixth lens is reasonably planned, which is beneficial to the smooth transition of the light to the imaging surface.

[0110] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. Such arrangement is beneficial to the reduction of the rear aperture, reduces the introduction of peripheral aberration light to the rear, and improves the resolution capability.

[0111] In the embodiment, the first lens is an aspherical lens, and the sixth lens is an aspherical lens. At least two or more aspherical lenses are used, which is beneficial to the correction of system aberration and the improvement of resolution. The use of aspherical lenses can effectively correct astigmatism and field curvature, and realize high resolution. The first side surface of the first lens is arranged in a shape of a center convex edge flat, so that the incident light is concentrated at the edge, which is beneficial to the large angle resolution in the central region.

[0112] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. Such arrangement can smoothly transition the light passing through the front lens to the rear optical system, and reduce the total length of the optical lens. The various aberrations of the optical system are fully corrected, the resolution is improved under the premise of compact structure, the optical performance such as distortion and CRA is optimized. The fourth lens and the fifth lens are cemented, and materials with different Abbe numbers are used, which is beneficial to the correction of system chromatic aberration, the improvement of imaging quality, and the compactness of the overall structure of the optical system. The physical length of the optical system is shortened, which is beneficial to the miniaturization, and reduces the tolerance sensitivity problems such as inclination or eccentricity of the lens unit caused in the assembly process. The fourth lens with a negative focal power is in front, and the fifth lens with a positive focal power is behind, which can quickly converge the divergent light collected by the front diaphragm and then transition to the rear, and is more beneficial to the reduction of the optical path of the light in the rear, so as to realize a short TTL.

[0113] In addition, the fourth lens and the fifth lens are cemented to form a cemented lens, so that the interval between the fourth lens and the fifth lens can be reduced, the total length of the system is further reduced, the assembly components between the fourth lens and the fifth lens are reduced, the process is reduced, the cost is reduced, the light loss caused by the reflection between the lenses is reduced, the illumination is improved, the field curvature is further reduced, and the axial point aberration of the system is corrected.

[0114] In the embodiment, the optical total length of the optical lens, that is, 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, the length of the optical lens can be effectively limited under the condition of the same imaging surface and the same image height, which is beneficial to realize miniaturization. Preferably, TTL / H / FOV≤0.045.

[0115] In the embodiment, the optical total length of the optical lens, that is, 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, the length of the optical lens can be effectively limited under the condition of the same imaging surface and the same image height, which is beneficial to realize miniaturization. Preferably, TTL / H / FOV≤0.045.

[0116] In the embodiment, the center curvature radius R11 of the first side surface of the first lens of the optical lens and the center curvature radius R12 of the second side surface of the first lens of the optical lens satisfy: 1.5≤R11 / R12≤2.5. Satisfying the condition formula makes the shape of the first lens more reasonable, which is beneficial to the first lens to collect more light into the rear optical system, reduces the aperture of the front end of the optical lens, reduces the volume, improves the resolution, and realizes miniaturization. Preferably, 1.8≤R11 / R12≤2.2.

[0117] In the embodiment, the optical total length of the optical lens, that is, 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 total focal length value F of the optical lens satisfy: TTL / F≤5. Satisfying the condition formula can effectively limit the length of the optical lens and realize miniaturization. Preferably, TTL / F≤4.5.

[0118] In the embodiment, the center curvature radius R21 of the first side surface of the second lens of the optical lens, the center curvature radius R22 of the second side surface of the second lens of the optical lens, and the integral focal length value F of the optical lens satisfy the condition: F / R21+F / R22≤2.2. Satisfying the condition can assist the incident light to enter the optical system and effectively correct the astigmatism to improve the imaging quality. Preferably, F / R21+F / R22≤2.

[0119] In the embodiment, the maximum light passing aperture D of the first 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 maximum field of view angle FOV of the optical lens satisfy the condition: D / H / FOV≤0.02. Satisfying the condition ensures that the front end aperture of the optical lens is small, which is conducive to miniaturization. Preferably, D / H / FOV≤0.018.

[0120] In the embodiment, the maximum light passing aperture D of the first 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 of the optical lens satisfy the condition: D / H / θ≤1.147. Satisfying the condition ensures that the front end aperture of the optical lens is small, which is conducive to miniaturization. Preferably, D / H / θ≤1.03.

[0121] 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 the condition: -5≤F4 / F5<0. The focal lengths of the fourth lens and the fifth lens of the cemented lens are close, which is conducive to the smooth transition of light, is conducive to the correction of chromatic aberration, improves the image quality, and effectively improves the lens thermal compensation. Satisfying the condition can still maintain stable imaging at high and low temperatures. Preferably, -3.5≤F4 / F5≤-1.5.

[0122] In the embodiment, the center curvature radius R41 of the first side surface of the fourth lens of the optical lens and the center curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy the condition: 1.3≤R41 / R42≤2.5. By reasonably configuring the curvature radius of the fourth lens, the light collected by the fourth lens is compressed, so that the light trend is relatively smooth, thereby smoothly transitioning to the rear. And can effectively reduce the system aberration and improve the system imaging quality. If it is lower than the lower limit value of the condition, the incident angle of the light incident to the first side surface of the fifth lens increases, thereby causing the relative luminance to decrease. Therefore, by satisfying the condition, a bright image with high quality can be obtained. The center curvature radius of the first side surface of the fourth lens needs to be as smooth as possible, which is conducive to reducing the central optical path of the fourth lens and the rear optical element, and reducing the ghost image caused by the reflection of energy. Preferably, 1.5≤R41 / R42≤2.

[0123] In the embodiment, the focal length value F2 of the second lens of the optical lens and the overall focal length value F of the optical lens satisfy: -6≤F2 / F≤-2.5. Satisfying the condition formula helps to achieve thermal compensation and obtain good temperature performance. Preferably, -5≤F2 / F≤-2.6.

[0124] In the embodiment, the central curvature radius R61 of the first side surface of the sixth lens of the optical lens and the central curvature radius R62 of the second side surface of the sixth lens of the optical lens satisfy: -13≤(R61-R62) / (R61+R62)≤1.2. Satisfying the condition formula makes the central curvature radii of the first side surface and the second side surface of the sixth lens relatively close, ensures that the light rays pass through the last lens relatively gently, and can sufficiently correct the aberration of the optical system, thereby reducing the tolerance sensitivity of the optical system. Preferably, -11≤(R61-R62) / (R61+R62)≤0.8.

[0125] In the embodiment, the focal length value F4 of the fourth lens of the optical lens, the focal length value F5 of the fifth lens of the optical lens, and the overall focal length value F of the optical lens satisfy: -20≤F4*F5 / F≤-8. Satisfying the condition formula enables aberration correction between the fourth lens and the fifth lens, which is beneficial to improve imaging resolution. Preferably, -16≤F4*F5 / F≤-10.

[0126] In the embodiment, the overall focal length value F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0

[0127] In the embodiment, the maximum field of view FOV of the optical lens, the overall focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 70≤(FOV×F) / H. Satisfying the condition formula simultaneously satisfies long focal length and large field of view, which helps the optical lens to realize large field of view and realize large angle resolution. Preferably, 75≤(FOV×F) / H.

[0128] In the embodiment, the overall focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Satisfying the condition formula is beneficial to realize small FNO and is beneficial to increase the light quantity. Preferably, F / ENPD≤1.65.

[0129] In the embodiment, the distance d2 from the first side center of the second lens to the second side center of the second lens of the optical lens and the total optical length of the optical lens, i.e., the 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 satisfy: 0.04≤d2 / TTL≤0.1. By reasonably setting the center thickness of the second lens, the sensitivity is reduced under the premise of ensuring the imaging quality. Preferably, 0.065≤d2 / TTL≤0.085.

[0130] In the embodiment, the radius of curvature R21 of the first side of the second lens of the optical lens, the distance d2 from the first side center of the second lens to the second side center of the second lens, and the radius of curvature R22 of the second side of the second lens of the optical lens satisfy: 1≤(R21+d2) / R22≤3. By reasonably controlling the shape of the second lens, the light ray trend is smoothly transitioned, and the large field of view light rays on the second side of the first lens are collected as much as possible to enter the rear optical system, thereby realizing a large field of view. Preferably, 1.8≤(R21+d2) / R22≤2.8.

[0131] In the embodiment, the lens edge slope K(S1) of the first lens of the optical lens at the maximum field of view angle satisfies: arctan(1 / K(S1))≥20. The first side of the first lens is set to a shape with a central convex edge flat, so that the incident light is concentrated on the edge. Preferably, arctan(1 / K(S1))≥25.

[0132] In the embodiment, the lens edge slope K(S2) of the second side of the first lens of the optical lens at the maximum field of view angle satisfies: arctan(1 / K(S2))≥33. Satisfying this condition formula ensures that the second side of the first lens has a large opening angle, which is conducive to the rapid focusing of the large-angle peripheral light rays entering via the first lens, thereby improving the imaging quality. Preferably, arctan(1 / K(S2))≥35.

[0133] In the embodiment, the total focal length value F of the optical lens, the focal length value F1 of the first lens of the optical lens, and the focal length value F2 of the second lens of the optical lens satisfy: 25≤F1*F2 / F≤85. Satisfying this condition formula is conducive to suppressing high-order aberrations, thereby improving the resolution performance and imaging quality of the optical system. Preferably, 30≤F1*F2 / F≤80.

[0134] 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 image height H corresponding to the maximum field angle of the optical lens satisfy: 3.3≤TTL / H≤5. Satisfying the condition formula, the image surface of the optical lens is expanded, the total length of the optical lens is compressed, the design of the optical lens is more miniaturized and lightened, and the system low sensitivity is ensured. Preferably, 3.32≤TTL / H≤4.5.

[0135] In the embodiment, the focal length value F of the whole set of the optical lens and the focal length value F1 of the first lens of the optical lens satisfy: -3≤F1 / F<0. By reasonably allocating the focal length of the first lens, it is beneficial for the large field angle light to enter the optical system. Preferably, -2.8≤F1 / F≤-1.5.

[0136] In the embodiment, the combined focal length value F45 of the fourth lens and the fifth lens of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2≤F45 / F2<0. Satisfying the condition formula, the back focal length BFL offset is small when the optical lens is in a high-low temperature environment, good temperature performance is obtained, and the clarity of the optical lens imaging is ensured. Preferably, -1≤F45 / F2≤-0.2.

[0137] In the embodiment, the curvature radius R21 of the first side surface of the second lens of the optical lens and 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 satisfy: 0.05≤R21 / TTL. In this way, the pupil image of the ghost image is far away from the imaging surface, the relative energy value of the ghost image is effectively reduced, and the quality of the imaging picture of the optical lens is improved. Preferably, 0.1≤R21 / TTL.

[0138] In the embodiment, the curvature radius R41 of the first side surface of the fourth lens of the optical lens and 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 satisfy: 0.05≤R41 / TTL. In this way, the pupil image of the ghost image is far away from the imaging surface, the relative energy value of the ghost image is effectively reduced, and the quality of the imaging picture of the optical lens is improved. Preferably, 0.1≤R41 / TTL.

[0139] Embodiment two

[0140] As Figures 1 to 8As shown, the optical lens comprises, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence, the first lens has negative refractive power; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; the sixth lens has positive refractive power; wherein the ratio between the curvature radius R21 of the first side surface of the second lens 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 center of the imaging surface of the optical lens, satisfies: 0.05≤R21 / TTL.

[0141] The first lens has negative refractive power, which is arranged to enable the first lens to collect as much field light as possible into the rear optical system and fix the direction trend of the large-angle light at the edge. The first lens preferably uses a high refractive index material, which is conducive to reducing the front aperture and improving the imaging quality. The second lens has negative refractive power, which is conducive to the smooth entry of light into the rear optical system, adjusting the light, reducing chromatic aberration, reducing total length divergence light, and making the light trend transition smoothly while making the large-angle light enter as much as possible to improve the illumination. The third lens has positive refractive power, which is conducive to light convergence, enabling the divergent light to smoothly enter the rear after passing through the third lens, and further making the light trend transition smoothly.

[0142] The fourth lens has negative refractive power, which is conducive to reducing the height of the light entering the fourth lens and reducing the overall sensitivity of the fourth lens and the fifth lens. The fifth lens has positive refractive power, which is conducive to maintaining stable imaging at high and low temperatures by reasonably allocating the refractive power of the fifth lens and the fourth lens. The sixth lens has positive refractive power, which can magnify the light passing through the fourth lens and the fifth lens to the imaging surface and reduce the total length of the system. By reasonably constraining the ratio between the curvature radius R21 of the first side surface of the second lens 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 center of the imaging surface of the optical lens, the pupil image of the ghost image can be made to move away from the imaging surface, effectively reducing the relative energy value of the ghost image and improving the quality of the imaging picture of the optical lens. Preferably, 0.1≤R21 / TTL.

[0143] In addition, the optical lens of the present application uses six lenses, can achieve more than one million pixels, and can realize higher definition. By optimizing the lens shape, reasonably distributing the refractive power, reducing the front aperture, and shortening the TTL, the optical lens is miniaturized while the resolution is improved to realize a large aperture. By reasonably matching the curvature, spacing, and back focus of each lens, ghost images are eliminated. The optical lens of the present application adopts a full-glass structure, reasonably matches lenses with different refractive index temperature coefficients, and can still clearly image in high and low temperature environments, greatly improving the safety of autonomous driving. At the same time, the optical lens of the present application has a long focal length, a large angle resolution in the central region, and can improve the environmental object recognition and increase the central detection area.

[0144] In the present embodiment, the first side of the first lens is a convex surface, and the second side of the first lens is a concave surface. Such a design allows the first lens to collect as much light as possible into the rear optical system and fix the direction of the large-angle light at the edge. The first lens preferably uses a high refractive index material, which is beneficial to the reduction of the front aperture and thus improves the imaging quality. Designing the first side of the first lens as a convex surface is beneficial to the sliding of water droplets in practical applications and reduces the impact on imaging.

[0145] In the present embodiment, the first side of the second lens is a convex surface, and the second side of the second lens is a concave surface. The convex first side of the second lens allows the second lens to collect as much light as possible from the second side of the first lens and then enter the rear optical system, realizing a large field of view. The concave second side of the second lens is matched with a third lens with positive focal length, making the aperture larger and conducive to realizing a small FNO.

[0146] In the present embodiment, the first side of the third lens is a convex surface, and the second side of the third lens is a convex surface. The third lens has a positive focal length, which is beneficial to light convergence. The convex second side of the third lens and the flat lens shape allow the divergent light to smoothly enter the rear, further stabilizing the light trend.

[0147] In the present embodiment, the first side of the third lens is a concave surface, and the second side of the third lens is a convex surface. The third lens has a positive focal length, which is beneficial to light convergence. The convex second side of the third lens and the flat lens shape allow the divergent light to smoothly enter the rear, further stabilizing the light trend.

[0148] In the present embodiment, the first side of the fourth lens is a convex surface, and the second side of the fourth lens is a concave surface. The convex first side of the fourth lens is beneficial to the reduction of the height of the light entering the fourth lens, reducing the overall sensitivity of the fourth lens and the fifth lens. The concave second side of the fourth lens is beneficial to cooperation with the fifth lens.

[0149] In the embodiment, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The first side surface of the fifth lens is convex, which is beneficial to cooperation with the fourth lens and makes the light rays converged by the fourth lens enter the rear lens gently, thereby improving the resolving power of the optical lens. The second side surface of the fifth lens is convex, which is beneficial to reducing the height of the light rays entering the sixth lens, reducing the sensitivity of the sixth lens, cooperating with the sixth lens with positive focal length to converge the light rays to the imaging surface, reducing the total length of the system, and ensuring miniaturization.

[0150] In the embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens has positive focal length, can magnify the light rays passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, correct astigmatism and field curvature by selecting an aspherical lens, and realize high resolution. Meanwhile, the surface type of the sixth lens is reasonably planned, which is beneficial to the gentle transition of the light rays to the imaging surface.

[0151] In the embodiment, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens has positive focal length, can magnify the light rays passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, correct astigmatism and field curvature by selecting an aspherical lens, and realize high resolution. Meanwhile, the surface type of the sixth lens is reasonably planned, which is beneficial to the gentle transition of the light rays to the imaging surface.

[0152] In the embodiment, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex. The sixth lens has positive focal length, can magnify the light rays passing through the fourth lens and the fifth lens to the imaging surface, reduce the total length, correct astigmatism and field curvature by selecting an aspherical lens, and realize high resolution. Meanwhile, the surface type of the sixth lens is reasonably planned, which is beneficial to the gentle transition of the light rays to the imaging surface.

[0153] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. Such arrangement is beneficial to the reduction of the rear aperture, the reduction of the introduction of peripheral aberration light to the rear, and the improvement of the resolving power.

[0154] In the embodiment, the first lens is an aspherical lens and / or the sixth lens is an aspherical lens. At least two or more aspherical lenses are used, which is beneficial to correcting system aberration and improving resolution. The use of the aspherical lens can effectively correct astigmatism and field curvature, and realize high resolution. The first side surface of the first lens is arranged in a shape of a flat center convex edge, so that the incident light is concentrated at the edge, which is beneficial to the central region with large angle resolution.

[0155] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. Such an arrangement can smoothly transition the light rays passing through the front lens to the rear optical system, reducing the total length of the optical lens. The various aberrations of the optical system are corrected sufficiently, and the resolution, distortion, CRA, and other optical performance can be improved under the premise of compact structure. The fourth lens and the fifth lens are cemented, and materials with different Abbe numbers are used in combination, which is conducive to the correction of chromatic aberration of the system, improves the imaging quality, and makes the overall structure of the optical system compact, which is conducive to shortening the physical length of the optical system, facilitating the realization of miniaturization, while reducing the tolerance sensitivity problem of lens units due to the inclination or eccentricity generated in the assembly process. The fourth lens with negative refractive power is in front, and the fifth lens with positive refractive power is in back, which can quickly converge the light rays diverged by the front diaphragm and then transition to the rear, which is more conducive to the reduction of the optical path of the rear light, so as to realize a short TTL.

[0156] In addition, the fourth lens and the fifth lens are cemented to form a cemented lens, which can reduce the spacing between the fourth lens and the fifth lens, further reducing the total length of the system. At the same time, it can reduce the assembly components between the fourth lens and the fifth lens, reduce the process, and reduce the cost. It can also reduce the light loss caused by reflection between the lenses, which is conducive to improving the illumination. Further, the field curvature can be reduced, and the off-axis aberration of the system can be corrected.

[0157] 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. Under the same imaging surface and the same image height, the length of the optical lens can be effectively limited to facilitate miniaturization. Preferably, TTL / H / FOV≤0.045.

[0158] 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. Under the same imaging surface and the same image height, the length of the optical lens can be effectively limited to facilitate miniaturization. Preferably, TTL / H / FOV≤0.045.

[0159] In the embodiment, the center curvature radius R11 of the first side surface of the first lens of the optical lens and the center curvature radius R12 of the second side surface of the first lens of the optical lens satisfy: 1.5≤R11 / R12≤2.5. Satisfying the condition formula makes the first lens shape more reasonable, is conducive to the first lens collecting more large-angle light into the rear optical system, and reduces the front aperture of the optical lens, reduces the volume, is conducive to improving the resolution while realizing miniaturization. Preferably, 1.8≤R11 / R12≤2.2.

[0160] In the embodiment, the total optical length of the optical lens, that is, 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 total focal length F of the optical lens satisfy: TTL / F≤5. Satisfying the condition formula can effectively limit the length of the optical lens, and realize miniaturization. Preferably, TTL / F≤4.5.

[0161] In the embodiment, the center curvature radius R21 of the first side surface of the second lens of the optical lens, the center curvature radius R22 of the second side surface of the second lens of the optical lens and the total focal length F of the optical lens satisfy: F / R21+F / R22≤2.2. Satisfying the condition formula can assist the incident light into the optical system, and effectively correct the astigmatism to improve the imaging quality. Preferably, F / R21+F / R22≤2.

[0162] In the embodiment, the maximum light passing aperture D of the first 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 maximum field of view angle FOV of the optical lens satisfy: D / H / FOV≤0.02. Satisfying the condition formula ensures that the front aperture of the optical lens is small, which is conducive to realizing miniaturization. Preferably, D / H / FOV≤0.018.

[0163] In the embodiment, the maximum light passing aperture D of the first 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 of the optical lens satisfy: D / H / θ≤1.147. Satisfying the condition formula ensures that the front aperture of the optical lens is small, which is conducive to realizing miniaturization. Preferably, D / H / θ≤1.03.

[0164] 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: -5≤F4 / F5<0. The focal lengths of the fourth lens and the fifth lens of the cemented lens are close, which is helpful for the smooth transition of light, is conducive to correcting chromatic aberration, improving image quality, and effectively improving lens thermal compensation. Satisfying the condition formula can still maintain stable imaging at high and low temperatures. Preferably, -3.5≤F4 / F5≤-1.5.

[0165] In the embodiment, the center curvature radius R41 of the first side surface of the fourth lens of the optical lens and the center curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy: 1.3≤R41 / R42≤2.5. By reasonably configuring the curvature radius of the fourth lens, the light rays collected by the fourth lens are compressed, so that the light ray trend is relatively gentle, thereby making the light rays smoothly transition to the rear. And it can effectively reduce the system aberration and improve the system imaging quality. If it is lower than the lower limit value of the conditional expression, the incidence angle of the light rays incident to the first side surface of the fifth lens increases, thereby causing the relative illumination to decrease. Therefore, by satisfying the conditional expression, a bright image with high quality can be obtained. The center curvature radius of the first side surface of the fourth lens needs to be as smooth as possible, which is beneficial to reduce the center optical path of the fourth lens and the rear optical element, and reduce the ghost caused by the convergence of reflected energy. Preferably, 1.5≤R41 / R42≤2.

[0166] In the embodiment, the focal length value F2 of the second lens of the optical lens and the total focal length value F of the optical lens satisfy: -6≤F2 / F≤-2.5. By satisfying the conditional expression, it is helpful to realize thermal compensation and obtain good temperature performance. Preferably, -5≤F2 / F≤-2.6.

[0167] In the embodiment, the center curvature radius R61 of the first side surface of the sixth lens of the optical lens and the center curvature radius R62 of the second side surface of the sixth lens of the optical lens satisfy: -13≤(R61-R62) / (R61+R62)≤1.2. By satisfying the conditional expression, the center curvature radii of the first side surface and the second side surface of the sixth lens are relatively close, which ensures that the light ray trend is relatively gentle when the light rays pass through the last lens, and the aberration of the optical system can be corrected sufficiently, thereby reducing the tolerance sensitivity of the optical system. Preferably, -11≤(R61-R62) / (R61+R62)≤0.8.

[0168] In the embodiment, the focal length value F4 of the fourth lens of the optical lens, 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: -20≤F4*F5 / F≤-8. By satisfying the conditional expression, the aberration correction between the fourth lens and the fifth lens can be performed, which is beneficial to improve the imaging resolution. Preferably, -16≤F4*F5 / F≤-10.

[0169] In the embodiment, the total focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0<F / H≤2. By satisfying the conditional expression, the focal length and the image height are controlled within a certain range, which is beneficial to improve the resolution. Preferably, 0.5≤F / H≤1.5.

[0170] In the embodiment, the maximum field of view FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 70≤(FOVxF) / H. Satisfying the condition formula, while satisfying the long focal length and the large field of view, helps the optical lens to realize a large field of view and realize a large angle resolution. Preferably, 75≤(FOVxF) / H.

[0171] In the embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2. Satisfying the condition formula is conducive to realizing a small FNO and increasing the light flux. Preferably, F / ENPD≤1.65.

[0172] In the embodiment, the distance d2 from the first side center of the second lens of the optical lens to the second side center of the second lens and the total optical length of the optical lens, that is, the 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 satisfy: 0.04≤d2 / TTL≤0.1. By reasonably setting the center thickness of the second lens, the sensitivity is reduced on the premise of ensuring the imaging quality. Preferably, 0.065≤d2 / TTL≤0.085.

[0173] In the embodiment, the radius of curvature R21 of the first side of the second lens of the optical lens, the distance d2 from the first side center of the second lens of the optical lens to the second side center of the second lens, and the radius of curvature R22 of the second side of the second lens of the optical lens satisfy: 1≤(R21+d2) / R22≤3. By reasonably controlling the shape of the second lens, the light ray trend is smoothly transitioned, and the large field of view light rays on the second side of the first lens are collected as much as possible to enter the rear optical system, thereby realizing a large field of view. Preferably, 1.8≤(R21+d2) / R22≤2.8.

[0174] In the embodiment, the maximum field of view under the lens edge slope K(S1) of the first side of the first lens of the optical lens satisfies: arctan(1 / K(S1))≥20. The first side of the first lens is set to a shape with a central convex edge flat, so that the incident light is concentrated on the edge. Preferably, arctan(1 / K(S1))≥25.

[0175] In the embodiment, the maximum field of view under the lens edge slope K(S2) of the second side of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥33. Satisfying the condition formula ensures that the second side of the first lens has a large opening angle, which is conducive to the rapid focusing of the large-angle peripheral light rays entering through the first lens and improves the imaging quality. Preferably, arctan(1 / K(S2))≥35.

[0176] In the embodiment, the following condition is met: 25≤F1*F2 / F≤85, where F is the total focal length of the optical lens, F1 is the focal length of the first lens of the optical lens, and F2 is the focal length of the second lens of the optical lens. Meeting the condition can help to suppress high-order aberrations, thereby improving the resolution performance and imaging quality of the optical system. Preferably, 30≤F1*F2 / F≤80.

[0177] In the embodiment, the following condition is met: 3.3≤TTL / H≤5, where TTL is the total optical length of the optical lens, that is, the 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, and H is the image height corresponding to the maximum field angle of the optical lens. Meeting the condition can achieve image surface expansion of the optical lens while compressing the total length of the optical lens, so that the optical lens is more miniaturized and lightweight, and the system sensitivity is ensured. Preferably, 3.32≤TTL / H≤4.5.

[0178] In the embodiment, the following condition is met: -3≤F1 / F<0, where F is the total focal length of the optical lens, and F1 is the focal length of the first lens of the optical lens. Reasonably allocating the focal length of the first lens can help the light of a large field angle to enter the optical system. Preferably, -2.8≤F1 / F≤-1.5.

[0179] In the embodiment, the following condition is met: -2≤F45 / F2<0, where F45 is the combined focal length of the fourth lens and the fifth lens of the optical lens, and F2 is the focal length of the second lens of the optical lens. Meeting the condition can ensure that the back focal length BFL of the optical lens has a small offset in a high-low temperature environment, and good temperature performance is obtained to ensure the clarity of the optical lens imaging. Preferably, -1≤F45 / F2≤-0.2.

[0180] In the embodiment, the following condition is met: 0.05≤R41 / TTL, where R41 is the curvature radius of the first side of the fourth lens of the optical lens, and TTL is the total optical length of the optical lens, that is, the 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. Such a setting can make the pupil image of the ghost image far away from the imaging surface, effectively reduce the relative energy value of the ghost image, and improve the quality of the imaging picture of the optical lens. Preferably, 0.1≤R41 / TTL.

[0181] Optionally, the above optical lens can further include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0182] The optical lens in the present application can adopt multiple lenses, for example, the above-mentioned six lenses. 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 the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the 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.

[0183] In the exemplary embodiments, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens can all be glass lenses. The optical lens made of glass can inhibit the shift of the back focal length of the optical lens with temperature change, so as to improve the system stability. At the same time, using glass material can avoid the imaging blur of the lens caused by the high and low temperature changes in the use environment, thereby affecting the normal use of the 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 sixth lens can all be glass aspherical lenses. Of course, in the application occasions with low temperature stability requirement, the first lens to the sixth lens in the optical lens can also be made of plastic. Using plastic to make the optical lens can effectively reduce the manufacturing cost. Of course, the first lens to the sixth lens in the optical lens can also be made of plastic and glass.

[0184] 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 separate 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.

[0185] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, so as to obtain the various results and advantages described in the present application. For example, although the six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens can also include other numbers of lenses.

[0186] The specific surface types and parameters of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0187] It should be noted that any one of the following examples 1 to 8 is applicable to all embodiments of the present application.

[0188] Example One

[0189] As shown in FIG. 1, it is a schematic diagram of the optical lens structure of Example One. Figure 1

[0190] As shown in FIG. 1, the optical lens sequentially includes, 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 sixth lens L6, a filter L7, a first side surface S15 of a protection glass, a second side surface S16 of the protection glass, and an imaging surface IMA. Figure 1 The first lens L1 has a negative refractive power, the first side surface S1 of the first lens is a convex surface, and the second side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the first side surface S3 of the second lens is a convex surface, and the second side surface S4 of the second lens is a concave surface. The third lens L3 has a positive refractive power, the first side surface S5 of the third lens is a convex surface, and the second side surface S6 of the third lens is a convex surface. The fourth lens L4 has a negative refractive power, the first side surface S8 of the fourth lens is a convex surface, and the second side surface S9 of the fourth lens is a concave surface. The fifth lens L5 has a positive refractive power, the first side surface S9 of the fifth lens is a convex surface, and the second side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the first side surface S11 of the sixth lens is a convex surface, and the second side surface S12 of the sixth lens is a concave surface. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface IMA.

[0191] In this example, the total effective focal length F of the optical lens is 5.945 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.127 mm.

[0192] Table 1 shows the basic structure parameter table of the optical lens of Example One, wherein the radius of curvature Radius and the thickness Thickness / distance unit are all in millimeters (mm).

[0193]

[0194]

[0195]

[0196] Table 1

[0197] In Example One, the first side surface and the second side surface of any one of the first lens L1 to the sixth lens L6 can all be aspherical surfaces, and the surface type of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0198]

[0199] ​​wherein x is the sag of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above); k is the conic constant; conic; A, B, C, D, E, F, G are the higher order coefficients. Table 2 below shows the conic constant k and the higher order coefficients A, B, C, D, E, F, G for the aspherical surfaces S1, S2, S11, and S12 of the optical lens in Example 1.

[0200] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.33E-03 -1.13E-04 -2.77E-07 1.29E-07 -2.61E-09 0.00E+00 0.00E+00 2 -9.05E-01 -7.75E-04 -8.16E-04 5.44E-05 -1.49E-06 1.36E-08 0.00E+00 0.00E+00 11 0.00E+00 3.26E-04 4.07E-05 -1.21E-06 -1.98E-08 9.28E-09 -2.11E-10 0.00E+00 12 0.00E+00 8.97E-04 3.30E-05 7.87E-06 -6.25E-07 -1.42E-08 3.65E-09 0.00E+00

[0201] Table 2

[0202] Example Two

[0203] As shown in FIG. 2, the optical lens structure of Example Two includes, 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 sixth lens L6, a filter L7, a first side surface S15 of a protection glass, a second side surface S16 of the protection glass, and an image plane IMA. Figure 2 As shown in FIG. 2, the optical lens structure of Example Two includes, 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 sixth lens L6, a filter L7, a first side surface S15 of a protection glass, a second side surface S16 of the protection glass, and an image plane IMA.

[0204] Figure 2 As shown in FIG. 2, the optical lens structure of Example Two includes, 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 sixth lens L6, a filter L7, a first side surface S15 of a protection glass, a second side surface S16 of the protection glass, and an image plane IMA.

[0205] The first lens L1 has a negative refractive power, the first side surface S1 of the first lens is a convex surface, and the second side surface S2 of the first lens is a concave surface. The second lens L2 has a negative refractive power, the first side surface S3 of the second lens is a convex surface, and the second side surface S4 of the second lens is a concave surface. The third lens L3 has a positive refractive power, the first side surface S5 of the third lens is a convex surface, and the second side surface S6 of the third lens is a convex surface. The fourth lens L4 has a negative refractive power, the first side surface S8 of the fourth lens is a convex surface, and the second side surface S9 of the fourth lens is a concave surface. The fifth lens L5 has a positive refractive power, the first side surface S9 of the fifth lens is a convex surface, and the second side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the first side surface S11 of the sixth lens is a convex surface, and the second side surface S12 of the sixth lens is a concave surface. Light from an object passes through the surfaces S1 to S16 in order and is finally imaged on the image plane IMA.

[0206] In this example, the total effective focal length F of the optical lens is 6.053 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total track length TTL of the optical lens is 26.479 mm.

[0207] ​Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0208] Surf Radius Thickness Nd Vd 1 4.286 2.767 1.59 61.25 2 2.034 3.820 3 20.017 1.881 1.76 26.61 4 8.495 1.459 5 12.592 2.205 1.90 31.32 6 -15.215 1.364 7 INFINITY 0.572 8 8.580 0.734 1.92 18.90 9 4.578 3.228 1.50 81.59 10 -11.683 0.945 11 7.346 3.000 1.62 63.41 12 14.254 0.700 13 INFINITY 0.550 1.52 64.21 14 INFINITY 1.398 15 INFINITY 0.500 1.52 64.21 16 INFINITY 1.354 IMA Infinity

[0209] Table 3

[0210] Table 4 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S11, and S12 in Example 2.

[0211] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.31E-03 -1.18E-04 -2.77E-07 1.29E-07 -2.61E-09 0.00E+00 0.00E+00 2 -9.05E-01 -7.75E-04 -8.16E-04 5.44E-05 -1.49E-06 1.36E-08 0.00E+00 0.00E+00 11 0.00E+00 3.26E-04 4.07E-05 -1.21E-06 -1.98E-08 9.28E-09 -2.11E-10 0.00E+00 12 0.00E+00 8.97E-04 3.30E-05 7.87E-06 -6.25E-07 -1.42E-08 3.65E-09 0.00E+00

[0212] Table 4

[0213] Example 3

[0214] like Figure 3 , which is a schematic diagram of the optical lens structure of Example 3. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0215] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0216] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA.

[0217] In this example, the total effective focal length F of the optical lens is 6.006 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.741 mm. Both the first lens L1 and the sixth lens L6 are retrograde lenses.

[0218] Table 5 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0219] Surf Radius Thickness Nd Vd 1 3.882 3.132 1.59 61.25 2 1.925 2.848 3 8.366 2.038 1.76 26.61 4 5.467 1.329 5 -40.001 2.169 1.90 31.32 6 -8.687 1.803 7 INFINITY 0.572 8 6.361 1.482 1.92 18.90 9 4.025 2.952 1.50 81.59 10 -6.929 1.192 11 15.355 2.590 1.62 63.41 12 -20.355 0.669 13 INFINITY 0.550 1.52 64.21 14 INFINITY 1.398 15 INFINITY 0.500 1.52 64.21 16 INFINITY 0.517 IMA Infinity

[0220] Table 5

[0221] Table 6 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S11, and S12 in Example 3.

[0222] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.61E-03 4.00E-06 -2.36E-05 1.82E-06 -7.62E-08 1.89E-09 -2.23E-11 2 -9.05E-01 -2.51E-03 -1.06E-03 4.68E-08 1.51E-05 -1.61E-06 7.30E-08 -1.30E-09 11 0.00E+00 -1.78E-03 -7.61E-05 1.28E-05 1.46E-07 -4.37E-07 4.73E-08 -1.58E-09 12 0.00E+00 -3.98E-03 4.53E-05 3.07E-05 -5.41E-06 3.53E-07 -8.94E-09 2.35E-11

[0223] Table 6

[0224] Example 4

[0225] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0226] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0227] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA.

[0228] In this example, the total effective focal length F of the optical lens is 6.021 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.861 mm. Both the first lens L1 and the sixth lens L6 are retroflex lenses.

[0229] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0230]

[0231]

[0232] Table 7

[0233] Table 8 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S11, and S12 in Example 4.

[0234] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.64E-03 4.28E-06 -2.36E-05 1.82E-06 -7.62E-08 1.89E-09 -2.22E-11 2 -9.05E-01 -2.47E-03 -1.06E-03 -8.08E-08 1.51E-05 -1.60E-06 7.29E-08 -1.30E-09 11 0.00E+00 -1.79E-03 -7.51E-05 1.28E-05 1.40E-07 -4.37E-07 4.73E-08 -1.58E-09 12 0.00E+00 -3.46E-03 4.70E-05 3.06E-05 -5.41E-06 3.53E-07 -8.94E-09 2.40E-11

[0235] Table 8

[0236] Example 5

[0237] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0238] like Figure 5 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0239] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA.

[0240] In this example, the total effective focal length F of the optical lens is 6.024 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.723 mm. The first lens L1 is a retroflex lens.

[0241] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0242]

[0243]

[0244] Table 9

[0245] Table 10 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S11, and S12 in Example 5.

[0246] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.52E-03 -1.70E-05 -1.61E-05 1.23E-06 -5.04E-08 1.20E-09 -1.35E-11 2 -9.05E-01 -1.35E-03 -6.39E-04 -6.32E-05 1.77E-05 -1.58E-06 6.86E-08 -1.23E-09 11 0.00E+00 -2.10E-03 -1.68E-04 2.75E-05 -2.40E-06 -2.03E-07 3.82E-08 -1.65E-09 12 0.00E+00 -2.54E-03 -8.02E-05 2.24E-05 -3.52E-06 2.57E-07 -9.24E-09 1.23E-10

[0247] Table 10

[0248] Example 6

[0249] like Figure 6 The figure shows a schematic diagram of the optical lens structure of Example 6.

[0250] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0251] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA.

[0252] In this example, the total effective focal length F of the optical lens is 6.063 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.098 mm. The first lens L1 is a retrograde lens.

[0253] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0254] Surf Radius Thickness Nd Vd 1 3.984 2.767 1.59 61.25 2 1.905 3.820 3 12.407 1.881 1.76 26.61 4 5.794 1.459 5 14.735 2.205 1.90 31.32 6 -10.495 1.364 7 INFINITY 0.572 8 8.524 0.734 1.92 18.90 9 4.581 3.228 1.50 81.59 10 -5.881 0.945 11 -100.354 3.000 1.62 63.41 12 -20.355 0.700 13 INFINITY 0.550 1.52 64.21 14 INFINITY 1.398 15 INFINITY 0.500 1.52 64.21 16 INFINITY 1.354 IMA Infinity

[0255] Table 11

[0256] Table 12 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspheric lens surfaces S1, S2, S11, and S12 in Example 6.

[0257] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.55E-03 -1.71E-05 -1.61E-05 1.23E-06 -5.04E-08 1.20E-09 -1.35E-11 2 -9.05E-01 -1.39E-03 -6.38E-04 -6.32E-05 1.77E-05 -1.58E-06 6.86E-08 -1.23E-09 11 0.00E+00 -3.17E-03 -1.64E-04 2.74E-05 -2.38E-06 -2.03E-07 3.81E-08 -1.63E-09 12 0.00E+00 -3.13E-03 -7.74E-05 2.24E-05 -3.52E-06 2.59E-07 -9.23E-09 1.23E-10

[0258] Table 12

[0259] Example 7

[0260] like Figure 7 The figure shows a schematic diagram of the optical lens structure of Example 7.

[0261] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0262] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA.

[0263] In this example, the total effective focal length F of the optical lens is 6.020 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 25.782 mm. Both the first lens L1 and the sixth lens L6 are retroflex lenses.

[0264] 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 / distance are millimeter (mm).

[0265] Surf Radius Thickness Nd Vd 1 3.850 2.922 1.59 61.25 2 1.863 3.637 3 15.256 2.058 1.76 26.61 4 6.936 1.456 5 14.280 1.799 1.90 31.32 6 -11.872 1.510 7 INFINITY 0.572 8 8.037 0.828 1.92 18.90 9 4.380 3.418 1.50 81.59 10 -8.413 1.001 11 19.497 2.415 1.62 63.41 12 -23.631 0.669 13 INFINITY 0.550 1.52 64.21 14 INFINITY 1.398 15 INFINITY 0.500 1.52 64.21 16 INFINITY 1.047 IMA Infinity

[0266] Table 13

[0267] The following Table 14 shows the conic constant k and the respective higher order coefficients A, B, C, D, E, F, G of the aspherical lens surfaces S1, S2, S11, and S12 which can be used in Example Seven.

[0268] High order / 4 6 8 10 12 14 16 Surf K A B C D E F G 1 -5.00E-01 -1.94E-03 -2.03E-05 -2.17E-05 1.80E-06 -7.65E-08 1.89E-09 -2.24E-11 2 -9.05E-01 -2.97E-03 -9.33E-04 -7.83E-06 1.43E-05 -1.44E-06 6.23E-08 -1.06E-09 11 0.00E+00 -1.00E-03 -5.92E-05 9.91E-06 2.85E-07 -3.32E-07 3.33E-08 -1.06E-09 12 0.00E+00 -2.38E-03 -4.88E-06 2.58E-05 -4.66E-06 3.39E-07 -1.10E-08 1.11E-10

[0269] Table 14

[0270] Example Eight

[0271] As shown in FIG. 8, it is a schematic view of the optical lens structure of Example Eight. Figure 8

[0272] As shown in FIG. 8, it is a schematic view of the optical lens structure of Example Eight. Figure 8

[0273] The first lens L1 has negative refractive power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has negative refractive power, the first side S3 of the second lens is convex, and the second side S4 of the second lens is concave. The third lens L3 has positive refractive power, the first side S5 of the third lens is convex, and the second side S6 of the third lens is convex. The fourth lens L4 has negative refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is concave. The fifth lens L5 has positive refractive power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is convex. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging plane IMA.

[0274] In the present example, the total effective focal length F of the optical lens is 6.021 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total track length TTL of the optical lens is 25.835 mm. The first lens L1 and the sixth lens L6 are both reverse curve lenses.

[0275] ​​Table 15 shows a basic structure parameter table of the optical lens of Example Eight, wherein the units of the radius of curvature Radius and the thickness Thickness / Distance are millimeters (mm).

[0276] Surf Radius Thickness Nd Vd 1 3.852 2.767 1.59 61.25 2 1.860 3.820 3 15.462 1.881 1.76 26.61 4 6.907 1.459 5 13.684 2.205 1.90 31.32 6 -12.198 1.364 7 INFINITY 0.572 8 7.939 0.734 1.92 18.90 9 4.344 3.228 1.50 81.59 10 -8.543 0.945 11 18.975 3.000 1.62 63.41 12 -24.870 0.700 13 INFINITY 0.550 1.52 64.21 14 INFINITY 1.398 15 INFINITY 0.500 1.52 64.21 16 INFINITY 1.354 IMA Infinity

[0277] Table 15

[0278] The following Table 16 shows the conic constant k and the respective higher order coefficients A, B, C, D, E, F, G of the aspherical lens surfaces S1, S2, S11, and S12 which can be used in Example Eight.

[0279]

[0280]

[0281] Table 16

[0282] In summary, Examples One to Eight respectively satisfy the relationships shown in Table 17.

[0283] Condition / Example 1 2 3 4 5 6 7 8 TTL / H / FOV 0.034 0.035 0.043 0.042 0.037 0.037 0.040 0.039 TTL / H / θ 1.961 2.024 2.484 2.424 2.115 2.127 2.298 2.236 R11 / R12 2.151 2.107 2.016 2.015 2.087 2.091 2.067 2.071 TTL / F 4.395 4.374 4.286 4.295 4.270 4.305 4.282 4.291 F / R21+F / R22 0.972 1.015 1.817 1.792 1.540 1.535 1.263 1.261 D / H / FOV 0.013 0.013 0.017 0.016 0.014 0.014 0.016 0.015 D / H / θ 0.751 0.764 0.965 0.937 0.822 0.815 0.892 0.866 F4 / F5 -1.670 -1.632 -3.015 -3.025 -2.014 -2.009 -1.824 -1.822 R41 / R42 1.832 1.874 1.580 1.577 1.861 1.861 1.835 1.828 F2 / F -3.440 -3.414 -4.926 -4.924 -2.730 -2.698 -3.082 -3.012 (R61-R62) / (R61+R62) -0.268 -0.320 -7.142 -7.142 0.663 0.663 -10.433 -7.437 F4*F5 / F -13.620 -13.457 -15.810 -15.876 -11.173 -11.133 -12.182 -12.150 F / H 0.779 0.807 1.011 0.984 0.864 0.862 0.936 0.909 (FOVxF) / H 77.859 80.712 101.111 98.445 86.404 86.213 93.631 90.924 F / ENPD 1.600 1.600 1.600 1.600 1.600 1.600 1.600 1.600 d2 / TTL 0.070 0.071 0.079 0.079 0.080 0.079 0.080 0.080 (R21+d2) / R22 2.637 2.578 1.903 1.900 2.478 2.496 2.496 2.536 arctan(1 / K(S1)) 27.207 27.207 29.823 29.823 29.871 29.871 28.748 28.748 arctan(1 / K(S2)) 48.214 48.214 37.073 37.073 42.625 42.625 41.146 41.146 F1*F2 / F 39.446 41.135 78.440 78.641 35.458 34.842 41.476 40.229 TTL / H 3.422 3.531 4.334 4.228 3.689 3.711 4.010 3.901 F1 / F -1.929 -1.990 -2.651 -2.653 -2.156 -2.130 -2.236 -2.218 F45 / F2 -0.804 -0.850 -0.315 -0.315 -0.629 -0.636 -0.718 -0.737 R21 / TTL 0.802 0.756 0.325 0.329 0.475 0.475 0.592 0.599 R41 / TTL 0.319 0.324 0.247 0.244 0.331 0.327 0.312 0.307

[0284] Table 17

[0285] Table 18 gives the effective focal length F of the optical lens of Examples One to Eight, the effective focal length Fl to F6 of each lens, etc. (unit: millimeters).

[0286]

[0287]

[0288] Table 18

[0289] Obviously, the above-described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work should belong to the scope of protection of the present application.

[0290] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" 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, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0291] It should be noted that the terms "first", "second", and the like, used in the description and in the claims of the present application as well as above-mentioned figures are used to distinguish between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of data so designated is not meant to limit a given item described by such data to the same category as other data designated by the same designations, but instead is so designated only for convenience as a means of discriminating between the two series of items that refer to a same data.

[0292] The preferred embodiments of the application described herein are examples of the present application and are not intended to limit the scope of the application. Various modifications and changes can be made thereto by those skilled in the art which freely adapt to the idea and principles of the application, without departing from the spirit and scope thereof, and it is to be understood that such modifications and changes are to be included within the scope of the application as defined by the appended claims.

Claims

1. An optical lens, characterized in that: The optical lens is composed of six lenses with optical power, and the six lenses with optical power are arranged in the following order from the object side to the image side along the optical axis: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having negative optical power, a first side surface of the second lens being convex, and a second side surface of the second lens being concave; a third lens having positive optical power, wherein the second side surface of the third lens is a convex surface; a fourth lens having negative optical power, a first side surface of the fourth lens being convex, and a second side surface of the fourth lens being concave; a fifth lens having positive optical power, a first side surface of the fifth lens being convex, and a second side surface of the fifth lens being convex; a sixth lens having positive optical power, wherein at least one of the first side surface and the second side surface of the sixth lens is a convex surface; The radius of curvature R21 of the first side surface of the second lens of the optical lens and the total optical length of the optical lens, that is, the 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, satisfy the following relationship: 0.05≤R21 / TTL≤0.802; the focal length value F2 of the second lens of the optical lens and the overall focal length value F of the optical lens satisfy the following relationship: -6≤F2 / F≤-2.5; the total optical length of the optical lens, that is, the 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 overall focal length value F of the optical lens satisfy the following relationship: TTL / F≤5.

2. The optical lens according to claim 1, wherein: The first side surface of the third lens is a convex surface or a concave surface; The first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave; or the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex; or the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

3. The optical lens according to claim 1, wherein: The optical lens further includes a stop, which is disposed between the third lens and the fourth lens.

4. The optical lens according to claim 1, wherein: The first lens is an aspherical lens and / or the sixth lens is an aspherical lens.

5. The optical lens according to claim 1, wherein: The fourth lens and the fifth lens are cemented together to form a cemented lens.

6. The optical lens according to any one of claims 1 to 5, characterized in that: The total optical length of the optical lens, that is, the 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 of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: 0.034≤TTL / H / FOV≤0.

05.

7. The optical lens according to any one of claims 1 to 5, characterized in that: The total optical length of the optical lens, that is, the 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 of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following conditions: 1.961≤TTL / H / θ≤2.

87.

8. The optical lens according to any one of claims 1 to 5, characterized in that: A central curvature radius R11 of a first side surface of the first lens of the optical lens and a central curvature radius R12 of a second side surface of the first lens of the optical lens satisfy the following relationship: 1.5≤R11 / R12≤2.

5.

9. The optical lens according to any one of claims 1 to 5, characterized in that: The central curvature radius R21 of the first side surface of the second lens of the optical lens, the central curvature radius R22 of the second side surface of the second lens of the optical lens, and the entire focal length value F of the optical lens satisfy the following relationship: 0.972≤F / R21+F / R22≤2.

2.

10. The optical lens according to any one of claims 1 to 5, characterized in that: The maximum clear aperture D of the first 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 the following relationship: 0.013≤D / H / FOV≤0.

02.

11. The optical lens according to any one of claims 1 to 5, characterized in that: The maximum clear aperture D of the first side surface 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 radian value θ of the maximum field angle of the optical lens satisfy the following conditions: 0.751≤D / H / θ≤1.

147.

12. The optical lens according to any one of claims 1 to 5, characterized in that: 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 the following relationship: -5≤F4 / F5<0.

13. The optical lens according to any one of claims 1 to 5, characterized in that: A central curvature radius R41 of the first side surface of the fourth lens of the optical lens and a central curvature radius R42 of the second side surface of the fourth lens of the optical lens satisfy the following relationship: 1.3≤R41 / R42≤2.

5.

14. The optical lens according to any one of claims 1 to 5, characterized in that: A central curvature radius R61 of the first side surface of the sixth lens of the optical lens and a central curvature radius R62 of the second side surface of the sixth lens of the optical lens satisfy the following relationship: -13≤(R61-R62) / (R61+R62)≤1.

2.

15. The optical lens according to any one of claims 1 to 5, characterized in that: The focal length value F4 of the fourth lens of the optical lens, the focal length value F5 of the fifth lens of the optical lens and the focal length value F of the entire optical lens group satisfy the following relationship: -20≤F4*F5 / F≤-8.

16. The optical lens according to any one of claims 1 to 5, characterized in that: The entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 0<F / H≤2.

17. The optical lens according to any one of claims 1 to 5, characterized in that: The maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 70≤(FOV×F) / H≤101.

111.

18. The optical lens according to any one of claims 1 to 5, characterized in that: The entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤2.

19. The optical lens according to any one of claims 1 to 5, characterized in that: The distance d2 from the center of the first side surface of the second lens of the optical lens to the center of the second side surface of the second lens and the total optical length of the optical lens, that is, the distance TTL 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 the following: 0.04≤d2 / TTL≤0.

1.

20. The optical lens according to any one of claims 1 to 5, characterized in that: The curvature radius R21 of the first side surface of the second lens of the optical lens, the distance d2 from the center of the first side surface of the second lens to the center of the second side surface of the second lens, and the curvature radius R22 of the second side surface of the second lens of the optical lens satisfy the following relationship: 1≤(R21+d2) / R22≤3.

21. The optical lens according to any one of claims 1 to 5, characterized in that: The lens edge slope K(S1) at the maximum field angle of the first side surface of the first lens of the optical lens satisfies: 29.871≥arctan(1 / K(S1))≥20; The lens edge slope K(S2) at the maximum field angle of the second side surface of the first lens of the optical lens satisfies: 48.214≥arctan(1 / K(S2))≥33.

22. The optical lens according to any one of claims 1 to 5, characterized in that: The focal length value F of the entire optical lens group, the focal length value F1 of the first lens of the optical lens, and the focal length value F2 of the second lens of the optical lens satisfy the following relationship: 25≤F1*F2 / F≤85.

23. The optical lens according to any one of claims 1 to 5, characterized in that: The total optical length of the optical lens, that is, the 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 image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 3.3≤TTL / H≤5.

24. The optical lens according to any one of claims 1 to 5, characterized in that: The focal length value F of the entire optical lens group and the focal length value F1 of the first lens of the optical lens satisfy the following relationship: -3≤F1 / F<0.

25. The optical lens according to any one of claims 1 to 5, characterized in that: A combined focal length value F45 of the fourth lens and the fifth lens of the optical lens and a focal length value F2 of the second lens of the optical lens satisfy the following relationship: -2≤F45 / F2<0.

26. The optical lens according to any one of claims 1 to 5, characterized in that: The curvature radius R41 of the first side surface of the fourth lens of the optical lens and the total optical length of the optical lens, that is, the 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 satisfy the following relationship: 0.05≤R41 / TTL≤0.

331.

27. An electronic device, characterized in that: The optical lens comprises the optical lens according to any one of claims 1 to 26 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images