Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with negative optical power, the first side of the first lens being a concave surface and the second side being a concave surface; a second lens with negative optical power; a third lens with positive optical power, the first side of the third lens being a convex surface and the second side being a convex surface; a fourth lens with positive optical power, the first side of the fourth lens being a convex surface; and a fifth lens with positive optical power, the first side of the fifth lens being a convex surface and the second side being a concave surface. The application solves the problem that the optical lens in the prior art cannot simultaneously have a large aperture, high resolution and high resolution.

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] In recent years, with the development of science and technology, the demand for optical lenses in daily life is increasing, and optical lenses are also applied to more and more scenes. For example, in the automobile driving industry, in order to ensure driving safety, it is necessary to more accurately detect the driving environment, and the optical lens becomes a key device for detecting information around the car. There are various types of optical lenses for cars. For example, a laser radar lens is an optical lens mainly applied in the field of vehicle automatic driving and distance detection. With the continuous improvement of the intelligence requirement of automatic driving, the requirement for optical lenses is also increasing, and the development is towards large aperture, high illumination, high resolution and high stability.

[0003] However, the existing optical lenses have various shortcomings. For example, the existing optical lenses have insufficient light transmission, cannot obtain sufficient signal strength, and result in a decrease in detection accuracy. Or the resolution of the optical lens in the prior art is insufficient, resulting in signal crosstalk between different signal points, affecting the detection accuracy. At the same time, the angular resolution is insufficient, and the angular resolution of the center and the edge is not uniform, resulting in regional attenuation of the detection signal strength, which is not conducive to the post-processing algorithm.

[0004] That is, the optical lens in the prior art has the problem that large aperture, high resolution and high resolution are difficult to be considered at the same time. SUMMARY

[0005] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has the problem that large aperture, high resolution and high resolution are difficult to be considered at the same time.

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

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

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

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

[0010] Further, the second side surface of the fourth lens is a plane.

[0011] Further, the second side surface of the fourth lens is a convex surface.

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

[0013] Further, the second lens and the fifth lens are aspherical lenses.

[0014] Further, the refractive index Nd1 of the first lens satisfies: Nd1≥1.6.

[0015] Further, the ratio between the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfies: F / ENPD≤1.1.

[0016] Further, the ratio between the total optical length of the optical lens, the center distance TTL from the first 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 satisfies: TTL / H / FOV≤0.1.

[0017] Further, the ratio between the maximum field angle FOV of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfies: (FOVxF) / H≥72.

[0018] Further, when the first side surface of the second lens is a concave surface and the second side surface is a convex surface, the ratio between the curvature radius R3 of the first side surface of the second lens and the total focal length F of the optical lens satisfies: R3 / F≤-2; and / or the ratio between the curvature radius R4 of the second side surface of the second lens and the total focal length F of the optical lens satisfies: R4 / F≤-4.

[0019] Further, when the first side surface of the second lens is a convex surface and the second side surface is a concave surface, the ratio between the curvature radius R3 of the first side surface of the second lens and the total focal length F of the optical lens satisfies: R3 / F≥20; and / or the ratio between the curvature radius R4 of the second side surface of the second lens and the total focal length F of the optical lens satisfies: R4 / F≥5.

[0020] Further, the ratio between the focal length F2 of the second lens and the total focal length F of the optical lens satisfies: |F2 / F|≥10.

[0021] Further, the ratio between the focal length F1 of the first lens and the total focal length F of the optical lens satisfies: |F1 / F|≤4.

[0022] Further, a ratio between the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfies: F3 / F4≤1.6.

[0023] Further, a ratio between the combined focal length value F12 of the first lens and the second lens and the combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfies: |F12 / F345|≤2.

[0024] Further, a ratio between the curvature radius R2 of the second side surface of the first lens and the maximum clear aperture D2 of the second side surface of the first lens satisfies: R2 / D2≤1.

[0025] Further, a ratio between the focal length value F5 of the fifth lens and the overall focal length value F of the optical lens satisfies: F5 / F≤7.5.

[0026] Further, a ratio between the central thickness d8 of the fourth lens and the total optical length of the optical lens, i.e. the center distance TTL from the first side center of the first lens of the optical lens to the imaging surface of the optical lens satisfies: d8 / TTL≥0.05.

[0027] Further, a ratio between the curvature radius R7 of the second side surface of the third lens and the overall focal length value F of the optical lens satisfies: R7 / F≤-2.5.

[0028] Further, a ratio between the focal length value F2 of the second lens, the focal length value F5 of the fifth lens, the refractive index temperature coefficient dn / dt(2) of the second lens and the refractive index temperature coefficient dn / dt(5) of the fifth lens satisfies: 8E+04≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3.5E+05.

[0029] Further, a ratio between the curvature radius R7 of the second side surface of the third lens and the curvature radius R8 of the first side surface of the fourth lens satisfies: 3≤(R7-R8) / (R7+R8)≤24.

[0030] Further, a ratio between the sag value SAG10 corresponding to the maximum aperture of the first side surface of the fifth lens and the sag value SAG11 corresponding to the maximum aperture of the second side surface of the fifth lens satisfies: |SAG10 / SAG11|≥2.

[0031] Further, a ratio between the sag value SAG10 corresponding to the maximum aperture of the first side surface of the fifth lens and the maximum clear aperture D10 of the first side surface of the fifth lens satisfies: |SAG10 / (D10 / 2)|≥0.15.

[0032] Further, a ratio between the sag value SAG6 corresponding to the maximum aperture of the first side surface of the third lens and the maximum clear aperture D6 of the first side surface of the third lens satisfies: |SAG6 / (D6 / 2)|≤0.2.

[0033] Further, an image height H corresponding to a maximum field angle of the optical lens, an overall focal length F of the optical lens, and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*TAN(θ / 2))≤0.7.

[0034] Further, a maximum light passing aperture D1 of the first side surface of the first lens and a curvature radius R1 of the first side surface of the first lens satisfy: |D1 / R1|≤0.5.

[0035] Further, a central thickness d6 of the third lens, a central thickness d8 of the fourth lens, a central thickness d10 of the fifth lens, and a combined focal length F345 of the third lens, the fourth lens, and the fifth lens satisfy: (d6+d8+d10) / F345≥0.8.

[0036] Further, a curvature radius R1 of the first side surface of the first lens and a curvature radius R2 of the second side surface of the first lens satisfy: R1 / R2≤-9.

[0037] According to another aspect of the present application, there is provided an optical lens comprising, in order from a first side to a second side: a first lens having a negative optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a positive optical power; a curvature radius R1 of a first side surface of the first lens and a curvature radius R2 of a second side surface of the first lens satisfy: R1 / R2≤-9.

[0038] Further, the first side surface of the first lens is concave, and the second side surface is concave.

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

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

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

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

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

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

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

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

[0047] Further, the second lens and the fifth lens are aspherical lenses.

[0048] Further, the refractive index Nd1 of the first lens satisfies: Nd1≥1.6.

[0049] Further, the ratio between the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfies: F / ENPD≤1.1.

[0050] Further, the ratio between the total optical length of the optical lens, the center distance TTL from the first 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 angle of the optical lens, and the maximum field angle FOV of the optical lens satisfies: TTL / H / FOV≤0.1.

[0051] Further, the ratio between the maximum field angle FOV of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfies: (FOVxF) / H≥72.

[0052] Further, when the first side of the second lens is concave and the second side is convex, the ratio between the curvature radius R3 of the first side of the second lens and the total focal length F of the optical lens satisfies: R3 / F≤-2; and / or the ratio between the curvature radius R4 of the second side of the second lens and the total focal length F of the optical lens satisfies: R4 / F≤-4.

[0053] Further, when the first side of the second lens is convex and the second side is concave, the ratio between the curvature radius R3 of the first side of the second lens and the total focal length F of the optical lens satisfies: R3 / F≥20; and / or the ratio between the curvature radius R4 of the second side of the second lens and the total focal length F of the optical lens satisfies: R4 / F≥5.

[0054] Further, the ratio between the focal length F2 of the second lens and the total focal length F of the optical lens satisfies: |F2 / F|≥10.

[0055] Further, the ratio between the focal length F1 of the first lens and the total focal length F of the optical lens satisfies: |F1 / F|≤4.

[0056] Further, the ratio between the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfies: F3 / F4≤1.6.

[0057] Further, the ratio between the curvature radius R2 of the second side of the first lens and the maximum light passing aperture D2 of the second side of the first lens satisfies: R2 / D2≤1.

[0058] Further, a focal length value F5 of the fifth lens and a total focal length value F of the optical lens satisfy: F5 / F≤7.5.

[0059] Further, a central thickness d8 of the fourth lens and a total track length of the optical lens, i.e., a center distance TTL from a first side center of a first lens of the optical lens to an imaging surface of the optical lens satisfy: d8 / TTL≥0.05.

[0060] Further, a curvature radius R7 of a second side surface of the third lens and a total focal length value F of the optical lens satisfy: R7 / F≤-2.5.

[0061] Further, a focal length value F2 of the second lens, a focal length value F5 of the fifth lens, a refractive index temperature coefficient dn / dt(2) of the second lens and a refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 8E+04≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3.5E+05.

[0062] Further, a curvature radius R7 of a second side surface of the third lens and a curvature radius R8 of a first side surface of the fourth lens satisfy: 3≤(R7-R8) / (R7+R8)≤24.

[0063] Further, a sag value SAG10 corresponding to a maximum aperture of the first side surface of the fifth lens and a sag value SAG11 corresponding to a maximum aperture of the second side surface of the fifth lens satisfy: |SAG10 / SAG11|≥2.

[0064] Further, a sag value SAG10 corresponding to a maximum aperture of the first side surface of the fifth lens and a maximum light passing aperture D10 of the first side surface of the fifth lens satisfy: |SAG10 / (D10 / 2)|≥0.15.

[0065] Further, a sag value SAG6 corresponding to a maximum aperture of the first side surface of the third lens and a maximum light passing aperture D6 of the first side surface of the third lens satisfy: |SAG6 / (D6 / 2)|≤0.2.

[0066] Further, an image height H corresponding to a maximum field angle of the optical lens, a total focal length value F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*TAN(θ / 2))≤0.7.

[0067] Further, a maximum light passing aperture D1 of the first side surface of the first lens and a curvature radius R1 of the first side surface of the first lens satisfy: |D1 / R1|≤0.5.

[0068] Further, the center thickness d6 of the third lens, the center thickness d8 of the fourth lens, the center thickness d10 of the fifth lens and the combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: (d6+d8+d10) / F345≥0.8.

[0069] Further, the combined focal length value F12 of the first lens and the second lens and the combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: |F12 / F345|≤2.

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

[0071] According to the technical scheme of the present application, the optical lens comprises, in sequence from the first side to the second side, a first lens with negative focal length, a second lens with negative focal length, a third lens with positive focal length, a fourth lens with positive focal length and a fifth lens with positive focal length, the first side of the first lens is concave, and the second side is concave; the first side of the third lens is convex, and the second side is convex; the first side of the fourth lens is convex; the first side of the fifth lens is convex, and the second side is concave.

[0072] The first lens has negative focal length and has a diverging effect on the light passing therethrough, and under the same field of view angle condition, the light exiting from the second side of the first lens can make the subsequent optical system have a larger light receiving surface; the first side of the first lens is concave, and the second side is concave. The negative focal length and the concave first side can effectively reduce the angle between the edge large field of view light and the first side, and improve the overall edge relative luminance of the optical lens; at the same time, the concave first side can avoid contact and friction between the lens and the mechanism, which is conducive to the protection of the lens and the film layer; the first lens preferably uses a high refractive index material, which is conducive to the reduction of the front aperture and the improvement of the imaging quality.

[0073] The second lens has negative focal length and receives the diverging light beam after the first lens, and the light beam received by the second lens is enlarged, which can well increase the entrance pupil diameter of the overall optical lens and increase the light quantity.

[0074] The third lens has positive focal length, and the first side of the third lens is convex, and the second side is convex. The third lens is located after the diaphragm and can effectively converge the light, the first side of the third lens is relatively flat, which is conducive to reducing the angle between the edge incident light and the surface normal of the first side, reducing the sensitivity, and at the same time, is conducive to correcting the diaphragm aberration, and further improving the resolution quality.

[0075] The fourth lens has positive focal power, the first side of the fourth lens is convex, and the second side of the fourth lens can be one of a concave surface, a plane and a convex surface. When the second side of the fourth lens is concave, the fourth lens and the third lens form a group of light relaying groups, effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens. The shape is a crescent shape convex to the first side, collects the light entering through the third lens, and smoothly transits the light trend to the rear, thereby reducing the light height incident to the rear and further reducing the sensitivity of the rear group of the system. When the second side of the fourth lens is a plane, the fourth lens and the third lens form a group of light relaying groups, effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens. When the second side of the fourth lens is convex, the fourth lens and the third lens form a group of light relaying groups, effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens. The shape is biconvex, which makes the divergent light converge smoothly into the rear, further smoothly transits the light trend, and the second side is convex, which further converges the light, reduces the angle between the edge chief ray and the normal of the image plane, and further improves the relative luminance of the edge field of view.

[0076] The fifth lens has positive focal power, the first side of the fifth lens is convex, and the second side is concave. The fifth lens can smoothly receive the compressed light of the front positive lens, reduce the light angle, correct the positive spherical aberration and edge coma introduced by the front positive lens by using the aberration correction force of the aspheric surface, and comprehensively correct the thermal balance of the overall optical lens by matching the focal power of the second lens. The first side of the fifth lens is convex to the first side, is relatively curved, smoothly receives the compressed light of the front positive lens, effectively reduces the high-order aberration introduced by the front optical lens, and improves the image quality. The second side is concave, and the curvature of the second side is large, the shape is gentle, the rear light aperture is collected, and the system aberration is effectively reduced to improve the system imaging quality.

[0077] The optical lens has at least one of the following beneficial effects: large light aperture, high resolution, high resolution and low cost. BRIEF DESCRIPTION OF DRAWINGS

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

[0079] Figure 1A structural diagram of an optical lens of Example 1 of the present application is shown.

[0080] Figure 2 A structural diagram of an optical lens of Example 2 of the present application is shown.

[0081] Figure 3 A structural diagram of an optical lens of Example 3 of the present application is shown.

[0082] Figure 4 A structural diagram of an optical lens of Example 4 of the present application is shown.

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

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

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

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

[0087] Figure 9 A structural diagram of an optical lens of Example 9 of the present application is shown.

[0088] Figure 10 A structural diagram of an optical lens of Example 10 of the present application is shown.

[0089] Figure 11 A structural diagram of an optical lens of Example 11 of the present application is shown.

[0090] Figure 12 A structural diagram of an optical lens of Example 12 of the present application is shown.

[0091] Wherein, the above-mentioned drawings include the following reference signs:

[0092] L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; STO, stop; L3, third lens; S6, first side surface of the third lens; S7, second side surface of the third lens; L4, fourth lens; S8, first side surface of the fourth lens; S9, second side surface of the fourth lens; L5, fifth lens; S10, first side surface of the fifth lens; S11, second side surface of the fifth lens; CG, cover glass; S12, first side surface of the cover glass; S13, second side surface of the cover glass; BPF, filter; S14, first side surface of the filter; S15, second side surface of the filter; IMA, imaging plane. DETAILED DESCRIPTION

[0093] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, unless otherwise specified. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0094] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0095] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0096] It should be noted that, in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0097] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of illustration. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0098] In the present disclosure, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the first side is referred to as the first side surface of the lens, and the surface of each lens near the second side is referred to as the second side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of a person skilled in the art. The R value (R refers to the radius of curvature in the paraxial region, which is usually the R value in the lens data of the optical software) is used to judge the convexity and concavity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. For the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0099] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0100] In the exemplary embodiments, the optical lens provided by the present application can be used as a vehicle-mounted lens. For the vehicle-mounted lens, the left side is the object side, and the right side is the image side. The first side is the object side, and the second side is the image side. The light rays from the object side can be imaged on the image side.

[0101] When the optical lens of the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side, and the right side is the image source side. In the exemplary embodiments, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the image side of the optical lens can be the image source side, and the object side can be the imaging side. The light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0102] In order to solve the problem that the optical lens in the prior art cannot simultaneously have a large light aperture, high resolution and high resolution, the present application provides an optical lens and an electronic device.

[0103] Embodiment one

[0104] As shown in Figures 1 to 12 The optical lens sequentially comprises a first lens having a negative optical power, a second lens having a negative optical power, a third lens having a positive optical power, a fourth lens having a positive optical power, and a fifth lens having a positive optical power from the first side to the second side. The first side surface of the first lens is concave, and the second side surface is concave. The first side surface of the third lens is convex, and the second side surface is convex. The first side surface of the fourth lens is convex. The first side surface of the fifth lens is convex, and the second side surface is concave.

[0105] The first lens has negative focal power and has a diverging effect on light rays passing therethrough, and light rays exiting the second side surface of the first lens can make the subsequent optical system have a larger light receiving surface under the same field of view angle condition; the first side surface of the first lens is concave, and the second side surface is concave. The negative focal power and the concave first side surface can effectively reduce the angle between the edge large field of view light and the first side surface when the light is incident, and improve the overall edge relative illumination of the optical lens; meanwhile, the concave first side surface can avoid contact and friction between the lens and the mechanism, which is conducive to the protection of the lens and the film layer; the first lens preferably uses a high refractive index material, which is conducive to the reduction of the front aperture and the improvement of the imaging quality.

[0106] The second lens has negative focal power and receives the diverging light beam after the first lens in the optical path; the light beam received by the second lens is enlarged, which can well increase the overall entrance pupil diameter of the optical lens and increase the light quantity.

[0107] The third lens has positive focal power; the first side surface of the third lens is convex, and the second side surface is convex. The third lens is a spherical lens with positive focal power, and the third lens is located after the diaphragm, which can effectively converge light rays; the first side surface of the third lens is relatively flat, which is conducive to reducing the angle between the edge incident light and the surface normal of the first side surface, reducing the sensitivity, and at the same time, is conducive to correcting the diaphragm aberration, and further improving the resolution quality.

[0108] The fourth lens has positive focal power; the first side surface of the fourth lens is convex, and the second side surface of the fourth lens can be one of a concave surface, a plane and a convex surface. When the second side surface of the fourth lens is concave, the fourth lens and the third lens form a group of light relaying groups, which effectively compresses the light aperture in the overall optical path, smoothly receives light, and corrects the negative spherical aberration and edge field curvature introduced by the front two negative lenses of the large aperture optical lens; the shape is a convex first side surface, which collects light entering through the third lens, and makes the light trend smoothly transition to the rear, thereby reducing the height of the light incident to the rear, and further reducing the sensitivity of the rear group of the system. When the second side surface of the fourth lens is a plane, the fourth lens and the third lens form a group of light relaying groups, which effectively compresses the light aperture in the overall optical path, smoothly receives light, and corrects the negative spherical aberration and edge field curvature introduced by the front two negative lenses of the large aperture optical lens. When the second side surface of the fourth lens is convex, the fourth lens and the third lens form a group of light relaying groups, which effectively compresses the light aperture in the overall optical path, smoothly receives light, and corrects the negative spherical aberration and edge field curvature introduced by the front two negative lenses of the large aperture optical lens; the shape is double convex, which makes the diverging light converge smoothly into the rear, further making the light trend smoothly transition; the second side surface is convex, which further converges the light, reduces the angle between the edge chief ray and the image surface normal, and further improves the edge field relative illumination.

[0109] The fifth lens has positive refractive power, the first side of the fifth lens is convex, and the second side is concave. The fifth lens is a plastic aspheric lens with positive refractive power, which can ensure that the fifth lens can smoothly receive the light rays compressed by the front positive lens, reduce the light ray angle, correct the positive spherical aberration and edge field curvature introduced by the front positive lens by using the aberration correction ability of the aspheric surface, and correct the thermal balance of the overall optical lens in combination with the refractive power of the second lens.

[0110] The optical lens has at least one of the following beneficial effects: large light aperture, high resolution, high resolution, low cost, and the like.

[0111] In the embodiment, the first side of the second lens is convex, and the second side is concave. The second lens is a plastic aspheric lens with negative refractive power, which receives the light beam diverged by the first lens in the optical path and corrects the off-axis aberration by using the aberration correction ability of the aspheric surface. The light beam passing through the second lens is enlarged, which can well increase the entrance pupil diameter of the overall optical lens and increase the light amount of the optical lens.

[0112] In the embodiment, the first side of the second lens is concave, and the second side is convex. The second lens is a plastic aspheric lens with negative refractive power, which receives the light beam diverged by the first lens in the optical path and corrects the off-axis aberration by using the aberration correction ability of the aspheric surface. The light beam passing through the second lens is enlarged, which can well increase the entrance pupil diameter of the overall optical lens and increase the light amount of the optical lens.

[0113] In the embodiment, the second side of the fourth lens is concave. The fourth lens is a spherical lens with positive refractive power, which forms a light relay group with the third lens, effectively compresses the light beam diameter in the overall optical path, smoothly receives the light beam, and corrects the negative spherical aberration and edge field curvature introduced by the front two negative lenses of the large-aperture optical lens. The shape is convex-concave, which is a convex crescent shape convex to the first side, collects the light passing through the third lens, smoothly transits the light to the rear, reduces the height of the light incident to the rear, and further reduces the sensitivity of the rear group of the system.

[0114] In the embodiment, the second side surface of the fourth lens is a plane. The fourth lens is a spherical lens with positive refractive power, and forms a light relay group with the third lens to effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens.

[0115] In the embodiment, the second side surface of the fourth lens is a convex surface. The fourth lens is a spherical lens with positive refractive power, and forms a light relay group with the third lens to effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens. The fourth lens is double-convex, so that the divergent light is successfully converged to enter the rear, and the light trend is further smoothly transitioned. The second side surface of the fourth lens is convex, so that the light is further converged to reduce the angle between the edge chief ray and the normal of the image plane, and thus the relative illumination of the edge field of view is improved.

[0116] In the embodiment, the optical lens further includes a diaphragm, which is arranged between the second lens and the third lens. The diaphragm is located between the second lens and the third lens, and divides the optical lens into a front group with negative refractive power and a rear group with positive refractive power, forms a reverse telephoto structure, and can well improve the image quality of the edge field of view.

[0117] In the embodiment, the second lens and the fifth lens are both aspherical lenses. This arrangement can effectively utilize the ability of aspherical lenses to correct high-order aberrations and improve the overall image quality of the optical lens.

[0118] In the embodiment, the refractive index Nd1 of the first lens satisfies Nd1≥1.6. The first lens uses a high refractive index material, which is beneficial to reducing the front aperture and improving the imaging quality. Preferably, Nd1≥1.7.

[0119] 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≤1.1. Satisfying this condition is beneficial to ensuring a small FNO and increasing the light flux. Preferably, F / ENPD≤0.9.

[0120] In the embodiment, the total optical length of the optical lens, i.e., the distance TTL from the first 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≤0.1. Satisfying this condition is beneficial to ensuring miniaturization. Preferably, TTL / H / FOV≤0.08.

[0121] 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 the condition (FOVxF) / H≥72. Satisfying the condition can simultaneously satisfy long focal length and large field of view; and is helpful to the overall effect of the optical lens, and can realize large central angle resolution. Preferably, (FOVxF) / H≥75.

[0122] In the embodiment, when the first side surface of the second lens is a concave surface and the second side surface is a convex surface, the curvature radius R3 of the first side surface of the second lens and the overall focal length F of the optical lens satisfy the condition R3 / F≤-2; and the curvature radius R4 of the second side surface of the second lens and the overall focal length F of the optical lens satisfy the condition R4 / F≤-4. The second lens is in a concave-convex shape, and the second lens controls the curvature radius of the second side surface to be large, so that the angle between the outgoing light beam and the normal of the surface can be reduced when the second side surface diverges the light beam, which is helpful to keep the image quality stable under different temperatures. Preferably, -6≤R3 / F≤-3, and -12≤R4 / F≤-4.

[0123] In the embodiment, when the first side surface of the second lens is a convex surface and the second side surface is a concave surface, the curvature radius R3 of the first side surface of the second lens and the overall focal length F of the optical lens satisfy the condition R3 / F≥20; and the curvature radius R4 of the second side surface of the second lens and the overall focal length F of the optical lens satisfy the condition R4 / F≥5. The second lens is in a convex-concave shape, and the second lens controls the curvature radius of the first side surface to be large, so that the diverging light beam of the first lens can be smoothly accepted, and the light beam incident angle of the surface itself can be reduced, which is helpful to keep the image quality stable under different temperatures. Preferably, 22≤R3 / F≤30, and 6≤R4 / F≤10.

[0124] In the embodiment, the focal length F2 of the second lens and the overall focal length F of the optical lens satisfy the condition |F2 / F|≥10. The greater the focal length of the second lens, the lower the influence of the second lens on the thermal stability of the overall optical lens under high and low temperatures. Preferably, |F2 / F|≥12.

[0125] In the embodiment, the focal length F1 of the first lens and the overall focal length F of the optical lens satisfy the condition |F1 / F|≤4. By reasonably allocating the focal length of the first lens, the angle between the edge large field of view light and the first side surface can be reduced, the relative illumination of the overall optical lens can be improved, and the resolution can be improved. Preferably, |F1 / F|≤3. More preferably, 1.5≤|F1 / F|≤3.

[0126] In the embodiment, a ratio between the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfies F3 / F4≤1.6. By reasonably distributing the focal lengths of the third lens and the fourth lens, the two positive focal length lenses can effectively optimize aberrations introduced by the front end system and improve image quality. Preferably, F3 / F4≤1.3. More preferably, 0.6≤F3 / F4≤1.3.

[0127] In the embodiment, a ratio between the combined focal length value F12 of the first lens and the second lens and the combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfies |F12 / F345|≤2. Satisfying the condition formula makes the optical lens of the application a reverse telephoto structure, that is, the front group lens has negative focal length and the rear group lens has positive focal length. Reasonably distributing the focal length distribution of the front and rear lenses can better improve the resolution at a large angle. Preferably, |F12 / F345|≤1.5. More preferably, 0.5≤|F12 / F345|≤1.5.

[0128] In the embodiment, a ratio between the curvature radius R2 of the second side of the first lens and the maximum light aperture D2 of the second side of the first lens satisfies R2 / D2≤1. Controlling the ratio of the curvature radius of the second side of the first lens to the aperture, in the case of a constant aperture, the smaller R2 is, the smaller the ghost image energy level at a large angle is. At the same time, the processability of the lens needs to be considered. Preferably, R2 / D2≤0.8. More preferably, 0.3≤R2 / D2≤0.8.

[0129] In the embodiment, a ratio between the focal length value F5 of the fifth lens and the overall focal length value F of the optical lens satisfies F5 / F≤7.5. By reasonably controlling the focal length of the fifth lens, it is conducive to quickly converging the large-angle peripheral light entering via the fourth lens to the imaging surface, which is helpful for light collection and ensures the light flux. Preferably, F5 / F≤6.5. More preferably, 4≤F5 / F≤6.5.

[0130] In the embodiment, a ratio between the center thickness d8 of the fourth lens and the overall optical length of the optical lens, that is, the center distance TTL from the first side of the first lens of the optical lens to the imaging surface of the optical lens satisfies d8 / TTL≥0.05. Satisfying the condition formula ensures that the center thickness of the fourth lens is large, which can effectively compress the front end light to realize a small aperture, and is also conducive to the processability of the fourth lens. Preferably, d8 / TTL≥0.08.

[0131] In the embodiment, a ratio between the curvature radius R7 of the second side of the third lens and the overall focal length value F of the optical lens satisfies R7 / F≤-2.5. Satisfying the condition formula is conducive to reasonably distributing the curvature radius of the third lens and balancing various aberrations. Preferably, R7 / F≤-3.5. More preferably, -7≤R7 / F≤-3.5.

[0132] In the embodiment, the focal length value F2 of the second lens, the focal length value F5 of the fifth lens, the refractive index temperature coefficient dn / dt(2) of the second lens and the refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 8E+04≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3.5E+05. By reasonably matching the focal length and temperature coefficient of the two plastic lenses, the high and low temperature performance of the whole optical lens can be well maintained. Preferably, 9.5E+4≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3E+5.

[0133] In the embodiment, the curvature radius R7 of the second side of the third lens and the curvature radius R8 of the first side of the fourth lens satisfy: 3≤(R7-R8) / (R7+R8)≤24. By satisfying this condition, part of the high-order aberration can be well offset, and the image quality can be improved. Preferably, 4≤(R7-R8) / (R7+R8)≤22.

[0134] In the embodiment, the sag value SAG10 corresponding to the maximum aperture of the first side of the fifth lens and the sag value SAG11 corresponding to the maximum aperture of the second side of the fifth lens satisfy: |SAG10 / SAG11|≥2. By satisfying this condition, the sag difference between the two sides of the fifth lens is large, which is beneficial to the fifth lens to collect light and converge the rear end light aperture, and can effectively reduce the system aberration and improve the system imaging quality. Preferably, |SAG10 / SAG11|≥2.5. More preferably, 2.5≤|SAG10 / SAG11|≤6.

[0135] In the embodiment, the sag value SAG10 corresponding to the maximum aperture of the first side of the fifth lens and the maximum light passing aperture D10 of the first side of the fifth lens satisfy: |SAG10 / (D10 / 2)|≥0.15. By satisfying this condition, in the case of a certain aperture of the fifth lens, the larger the sag of the first side of the fifth lens, the more effectively the high-order aberration introduced by the front optical lens can be reduced, and the image quality can be improved. Preferably, |SAG10 / (D10 / 2)|≥0.25. More preferably, 0.25≤|SAG10 / (D10 / 2)|≤0.6.

[0136] In the embodiment, the sag value SAG6 corresponding to the maximum aperture of the first side of the third lens and the maximum light passing aperture D6 of the first side of the third lens satisfy: |SAG6 / (D6 / 2)|≤0.2. In the case of a certain aperture of the third lens, the sag of the first side of the third lens is controlled to be small, which can effectively reduce the edge light incidence angle and reduce the sensitivity. Preferably, |SAG6 / (D6 / 2)|≤0.15.

[0137] In the embodiment, the maximum field angle of the optical lens corresponds to an image height H, the overall focal length value F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: (H / 2) / (F*TAN(θ / 2))≤0.7. This condition reflects the ratio of the actual image height to the ideal image height, which is beneficial to achieve a large angle resolution. Preferably, (H / 2) / (F*TAN(θ / 2))≤0.5. More preferably, 0.1≤(H / 2) / (F*TAN(θ / 2))≤0.5.

[0138] In the embodiment, the maximum light passing aperture D1 of the first side surface of the first lens and the curvature radius R1 of the first side surface of the first lens satisfy: |D1 / R1|≤0.5. Reasonably setting the ratio of the curvature radius of the first side surface of the first lens to the aperture, and controlling the absolute value of the curvature radius of the first side surface of the first lens to be large, which is beneficial to reduce the height of the light entering the second lens and achieve a small aperture. Preferably, |D1 / R1|≤0.4.

[0139] In the embodiment, the central thickness d6 of the third lens, the central thickness d8 of the fourth lens, the central thickness d10 of the fifth lens, and the combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: (d6+d8+d10) / F345≥0.8. When the above relationship is satisfied, the back group optical power of the optical lens is reasonably distributed, which can effectively improve the overall assembly yield of the optical lens. Preferably, (d6+d8+d10) / F345≥1.1. More preferably, 1.1≤(d6+d8+d10) / F345≤2.2.

[0140] In the embodiment, the curvature radius R1 of the first side surface of the first lens and the curvature radius R2 of the second side surface of the first lens satisfy: R1 / R2≤-9. By constraining the first lens to be double-concave, the two surfaces are opposite, the overall beam is first condensed and then divergent, and the overall effect is divergent. When the R value ratio is controlled within the above relationship, the central spherical aberration and the edge field curvature and astigmatism value introduced by the first lens can be effectively reduced, the image quality is improved, the first lens is avoided to introduce too large aberration, and the difficulty of correcting aberration at the rear end is increased. Preferably, R1 / R2≤-10.

[0141] Embodiment two

[0142] As Figures 1 to 12As shown, the optical lens sequentially comprises, from the first side to the second side: a first lens with negative focal power; a second lens with negative focal power; a third lens with positive focal power; a fourth lens with positive focal power; a fifth lens with positive focal power; the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy: R1 / R2≤-9. By constraining the first lens to be double-concave and the two side surfaces to be opposite, the overall light beam is first convergent and then divergent, and the overall effect is divergent. When the R value ratio is controlled within the above relationship, the central spherical aberration and the edge field curvature and astigmatism value introduced by the first lens as a whole can be effectively reduced, the image quality is improved, and the first lens does not introduce too large aberration. Preferably, R1 / R2≤-10.

[0143] In the embodiment, the first side surface of the first lens is concave, and the second side surface is concave. The first lens has negative focal power and has a divergent effect on the light passing therethrough. Under the same field of view angle condition, the light emitted through the second side surface of the first lens can make the subsequent optical system have a larger light receiving surface. The first side surface of the first lens is concave, and the second side surface is concave. The negative focal power and the concave first side surface can effectively reduce the angle between the edge large field of view light and the first side surface, improve the overall edge relative luminance of the optical lens, and avoid contact and friction between the lens and the mechanism, which is beneficial to the protection of the lens and the film layer. The first lens preferably uses a high refractive index material, which is beneficial to the reduction of the front aperture and the improvement of the imaging quality.

[0144] In the embodiment, the first side surface of the second lens is convex, and the second side surface is concave. The second lens is a plastic aspheric lens with negative focal power, which receives the divergent light beam after the first lens in the optical path and corrects the off-axis aberration by using the aberration correction ability of the aspheric surface. The light beam passing through the second lens is enlarged, which can well increase the entrance pupil diameter of the overall optical lens and increase the light amount of the optical lens.

[0145] In the embodiment, the first side surface of the second lens is concave, and the second side surface is convex. The second lens is a plastic aspheric lens with negative focal power, which receives the divergent light beam after the first lens in the optical path and corrects the off-axis aberration by using the aberration correction ability of the aspheric surface. The light beam passing through the second lens is enlarged, which can well increase the entrance pupil diameter of the overall optical lens and increase the light amount of the optical lens.

[0146] In the embodiment, the first side surface of the third lens is convex, and the second side surface is convex. The third lens is a spherical lens with positive focal power, and the third lens is located after the diaphragm and can effectively converge the light. The first side surface of the third lens is relatively flat, which is beneficial to reducing the angle between the edge incident light and the surface normal of the first side surface, reducing the sensitivity, and correcting the diaphragm aberration, thereby further improving the resolution quality.

[0147] In the embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave. The fourth lens is a spherical lens with positive focal power, and forms a light relay group with the third lens to effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens.

[0148] In the embodiment, the first side surface of the fourth lens is convex, and the second side surface is a plane. The fourth lens is a spherical lens with positive focal power, and forms a light relay group with the third lens to effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens.

[0149] In the embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex. The fourth lens is a spherical lens with positive focal power, and forms a light relay group with the third lens to effectively compress the light aperture in the overall optical path, smoothly receive the light, and correct the negative spherical aberration and edge field curvature introduced by the two negative lenses at the front end of the large-aperture optical lens. The fourth lens is double convex, so that the divergent light can smoothly enter the rear end after being converged, and the light trend is smoothly transitioned. The second side surface of the fourth lens is convex, so that the light is further converged, the angle between the edge chief ray and the normal of the image plane is reduced, and the relative illumination of the edge field of view is improved.

[0150] In the embodiment, the first side surface of the fifth lens is convex, and the second side surface is concave. The fifth lens is a plastic aspheric lens with positive focal power, which can smoothly receive the light compressed by the front positive lens, reduce the light angle, correct the positive spherical aberration and edge coma introduced by the front positive lens, and correct the thermal balance of the overall optical lens in combination with the focal power of the second lens. The first side surface of the fifth lens is convex to the first side, is relatively curved, smoothly receives the light compressed by the front positive lens, effectively reduces the high-order aberration introduced by the front optical lens, and improves the image quality. The second side surface is concave, and the curvature of the second side surface is large, the shape is gentle, the rear end light aperture is converged, and the system aberration is effectively reduced to improve the system imaging quality.

[0151] The optical lens has at least one of the following beneficial effects, such as a large light aperture, high resolution, high resolution, and low cost, by optimizing the focal power and surface shape of each lens.

[0152] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens. The diaphragm is located between the second lens and the third lens, and divides the optical lens as a whole into a front group with negative refractive power and a rear group with positive refractive power, forms a reverse telephoto structure, and can well improve the image quality of the edge field of view.

[0153] In the embodiment, the second lens and the fifth lens are aspherical lenses. Such arrangement can effectively utilize the ability of aspherical lenses to correct high-order aberrations and improve the overall image quality of the optical lens.

[0154] In the embodiment, the refractive index Nd1 of the first lens satisfies: Nd1≥1.6. The first lens uses a high refractive index material, which is conducive to the reduction of the front aperture and the improvement of the imaging quality. Preferably, Nd1≥1.7.

[0155] 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≤1.1. Satisfying this condition is conducive to ensuring a small FNO and increasing the light flux. Preferably, F / ENPD≤0.9.

[0156] In the embodiment, the overall optical length of the optical lens, i.e., the distance TTL from the first 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≤0.1. Satisfying this condition is conducive to ensuring miniaturization. Preferably, TTL / H / FOV≤0.08.

[0157] In the embodiment, the maximum field angle FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: (FOV×F) / H≥72. Satisfying this condition can simultaneously satisfy long focal length and large field angle; and is conducive to the overall effect of the optical lens giving consideration to large field angle and realizing central large-angle resolution. Preferably, (FOV×F) / H≥75.

[0158] In the embodiment, when the first side of the second lens is a concave surface and the second side is a convex surface, the curvature radius R3 of the first side of the second lens and the overall focal length F of the optical lens satisfy: R3 / F≤-2; and the curvature radius R4 of the second side of the second lens and the overall focal length F of the optical lens satisfy: R4 / F≤-4. The second lens is concave-convex, the curvature radius of the second side of the second lens is large, and when the second side itself diverges the light beam, the angle between the outgoing light beam and the normal of the surface can be reduced, which is conducive to maintaining the image quality of the optical lens stable at different temperatures. Preferably, -6≤R3 / F≤-3 and -12≤R4 / F≤-4.

[0159] In the embodiment, when the first side of the second lens is convex and the second side is concave, the radius of curvature R3 of the first side of the second lens and the overall focal length F of the optical lens satisfy: R3 / F≥20; the radius of curvature R4 of the second side of the second lens and the overall focal length F of the optical lens satisfy: R4 / F≥5. The second lens is convex-concave, the radius of curvature of the first side of the second lens is controlled to be large, the divergent light beam of the first lens can be smoothly received, the light incidence angle of the surface itself is reduced, and the image quality of the optical lens at different temperatures is stable. Preferably, 22≤R3 / F≤30, and 6≤R4 / F≤10.

[0160] In the embodiment, the focal length F2 of the second lens and the overall focal length F of the optical lens satisfy: |F2 / F|≥10. The greater the focal length of the second lens, the smaller the influence of the second lens on the thermal stability of the overall optical lens at high and low temperatures. Preferably, |F2 / F|≥12.

[0161] In the embodiment, the focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: |F1 / F|≤4. By reasonably allocating the focal length of the first lens, the angle between the edge large field of view light and the first side can be reduced, the relative illumination of the overall optical lens is improved, and the resolution is improved. Preferably, |F1 / F|≤3. More preferably, 1.5≤|F1 / F|≤3.

[0162] In the embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy: F3 / F4≤1.6. By reasonably allocating the focal lengths of the third lens and the fourth lens, the two positive focal length lenses can effectively optimize the aberration introduced by the front-end system and improve the image quality. Preferably, F3 / F4≤1.3. More preferably, 0.6≤F3 / F4≤1.3.

[0163] In the embodiment, the radius of curvature R2 of the second side of the first lens and the maximum light aperture D2 of the second side of the first lens satisfy: R2 / D2≤1. The ratio of the radius of curvature of the second side of the first lens to the aperture is controlled, and when the aperture is constant, the smaller R2 is, the smaller the energy level of the large-angle ghost image is; meanwhile, the machinability of the lens needs to be considered. Preferably, R2 / D2≤0.8. More preferably, 0.3≤R2 / D2≤0.8.

[0164] In the embodiment, the focal length F5 of the fifth lens and the overall focal length F of the optical lens satisfy: F5 / F≤7.5. By reasonably controlling the focal length of the fifth lens, the large-angle peripheral light entering through the fourth lens can be quickly converged to the imaging surface, which is helpful for light collection and ensures the light quantity. Preferably, F5 / F≤6.5. More preferably, 4≤F5 / F≤6.5.

[0165] In the embodiment, the center thickness d8 of the fourth lens and the total optical length of the optical lens, i.e., the center distance TTL from the first side of the first lens of the optical lens to the imaging surface of the optical lens satisfy: d8 / TTL≥0.05. Satisfying the condition formula ensures that the center thickness of the fourth lens is large, which can effectively compress the front end light, realize a small aperture, and is beneficial to the processability of the fourth lens. Preferably, d8 / TTL≥0.08.

[0166] In the embodiment, the radius of curvature R7 of the second side of the third lens and the total focal length F of the optical lens satisfy: R7 / F≤-2.5. Satisfying the condition formula is beneficial to the reasonable distribution of the radius of curvature of the third lens and the balance of various aberrations. Preferably, R7 / F≤-3.5. More preferably, -7≤R7 / F≤-3.5.

[0167] In the embodiment, the focal length F2 of the second lens, the focal length F5 of the fifth lens, the refractive index temperature coefficient dn / dt(2) of the second lens, and the refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 8E+04≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3.5E+05. By reasonably matching the focal length and temperature coefficient of the two plastic lenses, the high and low temperature performance of the entire optical lens can be well maintained. Preferably, 9.5E+4≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3E+5.

[0168] In the embodiment, the radius of curvature R7 of the second side of the third lens and the radius of curvature R8 of the first side of the fourth lens satisfy: 3≤(R7-R8) / (R7+R8)≤24. Satisfying the condition formula can well offset part of the advanced aberration and improve the image quality. Preferably, 4≤(R7-R8) / (R7+R8)≤22.

[0169] In the embodiment, the sag value SAG10 corresponding to the maximum aperture of the first side of the fifth lens and the sag value SAG11 corresponding to the maximum aperture of the second side of the fifth lens satisfy: |SAG10 / SAG11|≥2. Satisfying the condition formula ensures that the sag of the two sides of the fifth lens is large, which is beneficial to the fifth lens to collect light and converge the rear end light aperture, and can effectively reduce the system aberration and improve the system imaging quality. Preferably, |SAG10 / SAG11|≥2.5. More preferably, 2.5≤|SAG10 / SAG11|≤6.

[0170] In the embodiment, a value of a sag SAG10 corresponding to a maximum diameter of a first side surface of the fifth lens and a maximum diameter of light D10 of the first side surface of the fifth lens satisfy |SAG10 / (D10 / 2)|≥0.15. When the condition is satisfied, the larger the sag of the first side surface of the fifth lens is, the more effectively the high-order aberration introduced by the front optical lens can be reduced, and the image quality is improved, when the diameter of the fifth lens is constant. Preferably, |SAG10 / (D10 / 2)|≥0.25. More preferably, 0.25≤|SAG10 / (D10 / 2)|≤0.6.

[0171] In the embodiment, a value of a sag SAG6 corresponding to a maximum diameter of a first side surface of the third lens and a maximum diameter of light D6 of the first side surface of the third lens satisfy |SAG6 / (D6 / 2)|≤0.2. When the diameter of the third lens is constant, the smaller the sag of the first side surface of the third lens is, the more effectively the edge ray incidence angle and the sensitivity can be reduced. Preferably, |SAG6 / (D6 / 2)|≤0.15.

[0172] In the embodiment, a value of an image height H corresponding to a maximum field angle of the optical lens, a focal length F of the optical lens, and an arc value θ of the maximum field angle of the optical lens satisfy (H / 2) / (F*TAN(θ / 2))≤0.7. The condition reflects the ratio of the actual image height to the ideal image height, which is beneficial to achieve a large angular resolution. Preferably, (H / 2) / (F*TAN(θ / 2))≤0.5. More preferably, 0.1≤(H / 2) / (F*TAN(θ / 2))≤0.5.

[0173] In the embodiment, a maximum diameter of light D1 of a first side surface of the first lens and a radius of curvature R1 of the first side surface of the first lens satisfy |D1 / R1|≤0.5. Reasonably setting the ratio of the radius of curvature to the diameter of the first side surface of the first lens, and controlling the absolute value of the radius of curvature of the first side surface of the first lens to be large, which is beneficial to reduce the height of the light entering the second lens and achieve a small diameter. Preferably, |D1 / R1|≤0.4.

[0174] In the embodiment, a central thickness d6 of the third lens, a central thickness d8 of the fourth lens, a central thickness d10 of the fifth lens, and a combined focal length F345 of the third lens, the fourth lens, and the fifth lens satisfy (d6+d8+d10) / F345≥0.8. When the above relationship is satisfied, the rear group optical power of the optical lens is reasonably distributed, which can effectively improve the assembly yield of the overall optical lens. Preferably, (d6+d8+d10) / F345≥1.1. More preferably, 1.1≤(d6+d8+d10) / F345≤2.2.

[0175] In the embodiment, a combined focal length value F12 of the first lens and the second lens and a combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: |F12 / F345|≤2. Satisfying the condition formula makes the optical lens of the application a reverse telephoto structure, that is, the front group lens has negative focal power and the rear group lens has positive focal power, which reasonably allocates the focal length distribution of the front and rear lenses and can better improve the resolution at a large angle. Preferably, |F12 / F345|≤1.5. More preferably, 0.5≤|F12 / F345|≤1.5.

[0176] Optionally, the optical lens described above can further include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0177] The optical lens in the application can adopt multiple lenses, for example, five lenses as described above. The application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the imaging quality is emphasized, the number of aspherical lenses can be increased. The aspherical lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has 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 distortion aberration and improving astigmatism aberration. After using the aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0178] In the exemplary embodiment, the application does not limit the plastic and glass of the lens. If the temperature performance is emphasized, the first lens, the second lens, the third lens, the fourth lens and the fifth lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature change, thereby improving the system stability. At the same time, using glass material can avoid the imaging blur of the lens caused by high and low temperature changes in the use environment, thereby affecting the normal use of the optical lens. For example, the optical lens with all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the resolution quality and reliability are emphasized, the first lens to the fifth lens can all be glass aspherical lenses. Of course, in the application field where the temperature stability requirement is low, the first lens to the fifth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce the manufacturing cost. Of course, the first lens to the fifth lens in the optical lens can also be made of plastic and glass.

[0179] The present application also provides an electronic device comprising the optical lens 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 stand-alone imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0180] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although described in the embodiments by way of example with five lenses, the optical lens is not limited to comprising five lenses. If necessary, the optical lens can also comprise other numbers of lenses.

[0181] The specific surface shapes and parameters of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0182] It should be noted that any one of the following examples one to twelve is applicable to all embodiments of the present application.

[0183] Example One

[0184] As shown in FIG. 1, it is a schematic diagram of the optical lens structure of example one. Figure 1 As shown in FIG. 1, it is a schematic diagram of the optical lens structure of example one.

[0185] Figure 1 As shown in FIG. 1, the optical lens comprises, in order from the first side to the second side: a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a cover glass CG, a filter BPF, and an imaging surface IMA.

[0186] The first lens L1 has a negative optical power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has a negative optical power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has a positive optical power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has a positive optical power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has a positive optical power, the first side surface S10 of the fifth lens is convex, and the second side surface S11 of the fifth lens is concave. The cover glass CG has a first side surface S12 of the cover glass and a second side surface S13 of the cover glass. The filter BPF has a first side surface S14 of the filter and a second side surface S15 of the filter. The light from the first side passes through the surfaces S1 to S15 in order and is finally imaged on the imaging surface IMA.​

[0187] In this example, the total effective focal length F of the optical lens is 4.667mm, the maximum field of view (FOV) of the optical lens is 146.000°, and the total length (TTL) of the optical lens is 55.000mm.

[0188] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0189]

[0190] Table 1

[0191] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0192] Formula (1)

[0193] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A, B, C, D, and E are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspherical lens surfaces S3, S4, S10, and S11 in Example 1.

[0194]

[0195] Table 2

[0196] Example 2

[0197] like Figure 2 The diagram shown is a schematic of the optical lens structure in Example 2.

[0198] like Figure 2 As shown, the optical lens, from the first side to the second side, includes: a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a protective glass CG, a filter BPF, and an imaging surface IMA.

[0199] The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive 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 S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0200] In this example, the total effective focal length F of the optical lens is 4.667 mm, the maximum field of view FOV of the optical lens is 146.000°, and the total length TTL of the optical lens is 55.000 mm.

[0201] Table 3 shows the basic structure parameter table of the optical lens of Example Two, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0202]

[0203] Table 3

[0204] The following Table 4 shows the conic coefficient k and the high-order term coefficients A, B, C, D, and E of the aspheric lens surfaces S8, S9, S10, and S11 that can be used in Example Two.

[0205]

[0206] Table 4

[0207] Example Three

[0208] As shown in FIG. 3, it is a schematic diagram of the optical lens structure of Example Three. Figure 3 As shown in FIG. 3, it is a schematic diagram of the optical lens structure of Example Three.

[0209] Figure 3 As shown in FIG. 3, it is a schematic diagram of the optical lens structure of Example Three.

[0210] ​The first lens L1 has negative optical power, with its first side surface S1 being concave 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 S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being flat. The fifth lens L5 has positive optical power, with its first side surface S10 being convex and its second side surface S11 being concave. The protective glass CG has its first side surface S12 and its second side surface S13. The filter BPF has its first side surface S14 and its second side surface S15. Light from the first side passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface IMA.

[0211] In this example, the total effective focal length F of the optical lens is 4.666mm, the maximum field of view (FOV) of the optical lens is 145.000°, and the total length (TTL) of the optical lens is 55.000mm.

[0212] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0213]

[0214] Table 5

[0215] Table 6 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S10, and S11 in Example 3.

[0216]

[0217] Table 6

[0218] Example 4

[0219] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0220] like Figure 4 As shown, the optical lens, from the first side to the second side, includes: a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a protective glass CG, a filter BPF, and an imaging surface IMA.

[0221] The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is planar. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is ultimately imaged on the image plane IMA.

[0222] In this example, the total effective focal length F of the optical lens is 4.666 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 55.000 mm.

[0223] Table 7 shows the basic structure parameter table of the optical lens of Example Four, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0224]

[0225] Table 7

[0226] The following Table 8 shows the conic coefficient k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S8, S9, S10, and S11 that can be used in Example Four.

[0227]

[0228] Table 8

[0229] Example Five

[0230] As shown in FIG. 5, it is a schematic diagram of the optical lens structure of Example Five. Figure 5 As shown in FIG. 5, it is a schematic diagram of the optical lens structure of Example Five.

[0231] Figure 5 As shown in FIG. 5, it is a schematic diagram of the optical lens structure of Example Five.

[0232] ​The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is ultimately imaged on the image plane IMA.

[0233] In this example, the total effective focal length F of the optical lens is 4.720 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 55.000 mm.

[0234] Table 9 shows the basic structure parameter table of the optical lens of example five, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0235]

[0236] Table 9

[0237] The following table 10 shows the conic coefficient k and the high-order coefficients A, B, C, D, E of the aspherical lens surfaces S8, S9, S10 and S11 that can be used in example five.

[0238]

[0239] Table 10

[0240] Example six

[0241] As shown in FIG. 6, it is a schematic diagram of the optical lens structure of example six. Figure 6 As shown in FIG. 6, it is a schematic diagram of the optical lens structure of example six.

[0242] As shown in FIG. 6, it is a schematic diagram of the optical lens structure of example six. Figure 6 As shown in FIG. 6, it is a schematic diagram of the optical lens structure of example six.

[0243] The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0244] In this example, the total effective focal length F of the optical lens is 4.728 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 55.000 mm.

[0245] Table 11 shows the basic structure parameter table of the optical lens of example six, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0246]

[0247] Table 11

[0248] The following table 12 shows the conic coefficient k and the high-order term coefficients A, B, C, D, E of the aspheric lens surfaces S8, S9, S10 and S11 that can be used in example six.

[0249]

[0250] Table 12

[0251] Example seven

[0252] As shown in FIG. 7, it is a schematic diagram of the optical lens structure of example seven. Figure 7 As shown in FIG. 7, it is a schematic diagram of the optical lens structure of example seven.

[0253] Figure 7 As shown in FIG. 7, it is a schematic diagram of the optical lens structure of example seven.

[0254] ​The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive 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 S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0255] In this example, the total effective focal length F of the optical lens is 4.794 mm, the maximum field of view FOV of the optical lens is 146.000°, and the total length TTL of the optical lens is 52.169 mm.

[0256] Table 13 shows the basic structure parameter table of the optical lens of example seven, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0257]

[0258] Table 13

[0259] The following table 14 shows the conic coefficient k and the high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S8, S9, S10 and S11 that can be used in example seven.

[0260]

[0261] Table 14

[0262] Example eight

[0263] As shown in FIG. 8, it is a schematic diagram of the optical lens structure of example eight. Figure 8 As shown in FIG. 8, it is a schematic diagram of the optical lens structure of example eight.

[0264] Figure 8 As shown in FIG. 8, it is a schematic diagram of the optical lens structure of example eight.

[0265] ​The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive 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 S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0266] In this example, the total effective focal length F of the optical lens is 4.793 mm, the maximum field of view FOV of the optical lens is 146.000°, and the total length TTL of the optical lens is 52.196 mm.

[0267] Table 15 shows the 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).

[0268]

[0269] Table 15

[0270] The following table 16 shows the conic coefficient k and the high-order term coefficients A, B, C, D, E of the aspheric lens surfaces S8, S9, S10 and S11 that can be used in example eight.

[0271]

[0272] Table 16

[0273] Example nine

[0274] As shown in FIG. 9, it is a schematic diagram of the optical lens structure of example nine. Figure 9

[0275] As shown in FIG. 9, it is a schematic diagram of the optical lens structure of example nine. Figure 9

[0276] ​​The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is flat. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0277] In this example, the total effective focal length F of the optical lens is 4.794 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 50.760 mm.

[0278] Table 17 shows the basic structure parameter table of the optical lens of example nine, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0279]

[0280] Table 17

[0281] The following table 18 shows the conic coefficient k and the high-order coefficients A, B, C, D, E of the aspherical lens surfaces S8, S9, S10 and S11 that can be used in example nine.

[0282]

[0283] Table 18

[0284] Example ten

[0285] As shown in Table 17, the basic structure parameter table of the optical lens of example ten is shown. Figure 10 As shown in Table 17, the basic structure parameter table of the optical lens of example ten is shown.

[0286] Figure 10 As shown in Table 17, the basic structure parameter table of the optical lens of example ten is shown.

[0287] ​The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is flat. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 and a second side S13. The filter BPF has a first side S14 and a second side S15. Light from the first side sequentially passes through the surfaces S1-S15 and is finally imaged on the imaging plane IMA.

[0288] In this example, the total effective focal length F of the optical lens is 4.794 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 50.880 mm.

[0289] Table 19 shows the basic structure parameter table of the optical lens of example ten, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0290]

[0291] Table 19

[0292] The following table 20 shows the conic coefficient k and the high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S8, S9, S10 and S11 that can be used in example ten.

[0293]

[0294] Table 20

[0295] Example eleven

[0296] As shown in FIG. 11, it is a schematic diagram of the optical lens structure of example eleven. Figure 11 As shown in FIG. 11, it is a schematic diagram of the optical lens structure of example eleven.

[0297] Figure 11 As shown in FIG. 11, it is a schematic diagram of the optical lens structure of example eleven.

[0298] ​The first lens L1 has negative optical power, with its first side surface S1 being concave and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has positive optical power, with its first side surface S10 being convex and its second side surface S11 being concave. The protective glass CG has its first side surface S12 and its second side surface S13. The filter BPF has its first side surface S14 and its second side surface S15. Light from the first side passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface IMA.

[0299] In this example, the total effective focal length F of the optical lens is 4.795mm, the maximum field of view (FOV) of the optical lens is 145.000°, and the total length (TTL) of the optical lens is 50.331mm.

[0300] Table 21 shows the basic structural parameters of the optical lens in Example 11, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0301]

[0302] Table 21

[0303] Table 22 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S10, and S11 in Example 11.

[0304]

[0305] Table 22

[0306] Example 12

[0307] like Figure 12 The diagram shown is a schematic of the optical lens structure of Example Twelve.

[0308] like Figure 12 As shown, the optical lens, from the first side to the second side, includes: a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a protective glass CG, a filter BPF, and an imaging surface IMA.

[0309] The first lens L1 has negative refractive power, the first side S1 of the first lens is concave, 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 concave, and the second side S4 of the second lens is convex. The third lens L3 has positive refractive power, the first side S6 of the third lens is convex, and the second side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the first side S8 of the fourth lens is convex, and the second side S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the first side S10 of the fifth lens is convex, and the second side S11 of the fifth lens is concave. The cover glass CG has a first side S12 of the cover glass and a second side S13 of the cover glass. The filter BPF has a first side S14 of the filter and a second side S15 of the filter. Light from the first side sequentially passes through the surfaces S1 to S15 and is finally imaged on the imaging plane IMA.

[0310] In the present example, the total effective focal length F of the optical lens is 4.795 mm, the maximum field of view FOV of the optical lens is 145.000°, and the total length TTL of the optical lens is 50.380 mm.

[0311] Table 23 shows the basic structure parameter table of the optical lens of example twelve, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0312]

[0313] Table 23

[0314] The following table 24 shows the conic coefficient k and the high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S8, S9, S10 and S11 which can be used in example twelve.

[0315]

[0316] Table 24

[0317] In summary, examples one to twelve respectively satisfy the relationships shown in table 25.

[0318]

[0319] Table 25

[0320] Table 26 gives the effective focal length F of the optical lens of examples one to twelve, the effective focal lengths F1 to F5 of each lens, etc. (unit: millimeter).

[0321]

[0322] Table 26

[0323] Obviously, the above-described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application, without creative work, shall fall within the scope of protection of the present application.

[0324] It is to 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 according to 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, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0325] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an ordinal meaning. Rather, such terms are used to distinguish between different structures, regions, or components, unless otherwise indicated by context. It should also be understood that, unless otherwise specifically stated herein, the use of relative terms, such as "about", "approximately", "substantially", and the like, are used to indicate a possible variation from the stated value, and do not mean a deviation from the specific value recited.

[0326] The preferred embodiments of the present application have been described above with the specific embodiments. The present application is not limited to the above embodiments. It will be appreciated by those skilled in the art that changes can be made to the embodiments described in the preceding detailed description, that the same can be substituted for other embodiments already described, or that an improved series of embodiments can be developed and used. It is intended that the disclosed embodiments fall within the scope of the present application.

Claims

1. An optical lens characterized in that, The optical lens consists of five lenses with optical power, which sequentially include, from the first side to the second side: a first lens with negative optical power, the first side of the first lens is concave, and the second side is concave; a second lens with negative optical power; a third lens with positive optical power, the first side of the third lens is convex, and the second side is convex; a fourth lens with positive optical power, the first side of the fourth lens is convex; a fifth lens with positive optical power, the first side of the fifth lens is convex, and the second side is concave; The maximum field angle of the optical lens corresponds to the image height H, the total focal length value F of the optical lens, and the radian value θ of the maximum field angle of the optical lens, which satisfy: 0.1≤(H / 2) / (F*TAN(θ / 2))≤0.5; The radius of curvature R4 of the second side of the second lens and the total focal length value F of the optical lens satisfy: -12≤R4 / F≤-4 or 10≥R4 / F≥6.

2. The optical lens of claim 1, wherein, The first side of the second lens is convex, and the second side is concave.

3. The optical lens of claim 1, wherein, The first side of the second lens is concave, and the second side is convex.

4. The optical lens of claim 1, wherein, The second side of the fourth lens is concave.

5. The optical lens of claim 1, wherein, The second side of the fourth lens is a plane.

6. The optical lens of claim 1, wherein, The second side of the fourth lens is convex.

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

8. The optical lens of claim 1, wherein, The second lens and the fifth lens are aspherical lenses.

9. The optical lens of any of claims 1 to 8, wherein, The refractive index Nd1 of the first lens satisfies: Nd1≥1.

6.

10. The optical lens of any of claims 1 to 8, wherein, The total focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.

1.

11. The optical lens of any of claims 1 to 8, wherein, The total optical length of the optical lens, that is, the distance TTL from the first 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.

1.

12. The optical lens of any of claims 1 to 8, wherein, The maximum field angle FOV of the optical lens, 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: 80.898≥(FOV×F) / H≥72.

13. The optical lens of any of claims 1, 3-8, wherein, When the first side of the second lens is concave and the second side is convex, The radius of curvature R3 of the first side of the second lens and the total focal length value F of the optical lens satisfy: -6≤R3 / F≤-2.

14. The optical lens of any of claims 1, 2, 4-8, wherein, When the first side of the second lens is convex and the second side is concave, The radius of curvature R3 of the first side of the second lens and the total focal length value F of the optical lens satisfy: 30≥R3 / F≥20.

15. The optical lens of any of claims 1 to 8, wherein, The focal length value F2 of the second lens and the total focal length value F of the optical lens satisfy: |F2 / F|≥10.

16. The optical lens of any of claims 1 to 8, wherein, The focal length value F1 of the first lens and the total focal length value F of the optical lens satisfy: |F1 / F|≤4.

17. The optical lens of any of claims 1 to 8, wherein, The focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: F3 / F4≤1.

6.

18. The optical lens of any of claims 1 to 8, wherein, A combination focal length value F12 of the first lens and the second lens and a combination focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: |F12 / F345|≤2.

19. The optical lens of any of claims 1 to 8, wherein, A radius of curvature R2 of a second side surface of the first lens and a maximum light passing aperture D2 of the second side surface of the first lens satisfy: R2 / D2≤1.

20. The optical lens of any of claims 1 to 8, wherein, A focal length value F5 of the fifth lens and a total focal length value F of the optical lens satisfy: 4≤F5 / F≤7.

5.

21. The optical lens of any of claims 1 to 8, wherein, A center thickness d8 of the fourth lens and a total optical length of the optical lens, i.e. a center distance TTL from a first side center of a first lens of the optical lens to an imaging surface of the optical lens satisfy: 0.159≥d8 / TTL≥0.

05.

22. The optical lens of any of claims 1 to 8, wherein, A radius of curvature R7 of a second side surface of the third lens and a total focal length value F of the optical lens satisfy: -7≤R7 / F≤-2.

5.

23. The optical lens of any of claims 1 to 8, wherein, A focal length value F2 of the second lens, a focal length value F5 of the fifth lens, a refractive index temperature coefficient dn / dt(2) of the second lens and a refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 8E+04≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3.5E+05.

24. The optical lens of any of claims 1 to 8, wherein, A radius of curvature R7 of a second side surface of the third lens and a radius of curvature R8 of a first side surface of the fourth lens satisfy: 3≤(R7-R8) / (R7+R8)≤24.

25. The optical lens of any of claims 1 to 8, wherein, A sag value SAG10 corresponding to a maximum aperture of a first side surface of the fifth lens and a sag value SAG11 corresponding to a maximum aperture of a second side surface of the fifth lens satisfy: 6≥|SAG10 / SAG11|≥2.

26. The optical lens of any of claims 1 to 8, wherein, A sag value SAG10 corresponding to a maximum aperture of a first side surface of the fifth lens and a maximum light passing aperture D10 of the first side surface of the fifth lens satisfy: 0.6≥|SAG10 / (D10 / 2)|≥0.

15.

27. The optical lens of any of claims 1 to 8, wherein, A sag value SAG6 corresponding to a maximum aperture of a first side surface of the third lens and a maximum light passing aperture D6 of the first side surface of the third lens satisfy: |SAG6 / (D6 / 2)|≤0.

2.

28. The optical lens of any of claims 1 to 8, wherein, A maximum light passing aperture D1 of a first side surface of the first lens and a radius of curvature R1 of the first side surface of the first lens satisfy: |D1 / R1|≤0.

5.

29. The optical lens of any of claims 1 to 8, wherein, A center thickness d6 of the third lens, a center thickness d8 of the fourth lens, a center thickness d10 of the fifth lens and a combination focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: 2.2≥(d6+d8+d10) / F345≥0.

8.

30. The optical lens of any of claims 1 to 8, wherein, A radius of curvature R1 of a first side surface of the first lens and a radius of curvature R2 of a second side surface of the first lens satisfy: -16.117≤R1 / R2≤-9.

31. The optical lens of any of claims 1 to 8, wherein, The optical lens satisfies at least one of the following conditions: A refractive index Nd1 of the first lens satisfies: Nd1≥1.7; An overall focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤0.9; An optical total track length TTL of the optical lens, a maximum field of view FOV of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV≤0.08; A maximum field of view FOV of the optical lens, an overall focal length F of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy: 80.898≥(FOV×F) / H≥75; When the first side of the second lens is a concave surface and the second side is a convex surface, a curvature radius R3 of the first side of the second lens and the overall focal length F of the optical lens satisfy: -6≤R3 / F≤-3; and / or a curvature radius R4 of the second side of the second lens and the overall focal length F of the optical lens satisfy: -12≤R4 / F≤-4; When the first side of the second lens is a convex surface and the second side is a concave surface, a curvature radius R3 of the first side of the second lens and the overall focal length F of the optical lens satisfy: 22≤R3 / F≤30; a curvature radius R4 of the second side of the second lens and the overall focal length F of the optical lens satisfy: 6≤R4 / F≤10; A focal length F2 of the second lens and the overall focal length F of the optical lens satisfy: |F2 / F|≥12; A focal length F1 of the first lens and the overall focal length F of the optical lens satisfy: |F1 / F|≤3; A focal length F3 of the third lens and a focal length F4 of the fourth lens satisfy: F3 / F4≤1.3; A combined focal length F12 of the first lens and the second lens and a combined focal length F345 of the third lens, the fourth lens, and the fifth lens satisfy: |F12 / F345|≤1.5; A curvature radius R2 of the second side of the first lens and a maximum aperture D2 of the second side of the first lens satisfy: R2 / D2≤0.8; A focal length F5 of the fifth lens and the overall focal length F of the optical lens satisfy: 4≤F5 / F≤6.5; A central thickness d8 of the fourth lens and an optical total track length TTL of the optical lens, that is, a center distance from a first side center of the first lens of the optical lens to an imaging surface of the optical lens satisfy: 0.159≥d8 / TTL≥0.08; A curvature radius R7 of the second side of the third lens and the overall focal length F of the optical lens satisfy: -7≤R7 / F≤-3.5; A focal length value F2 of the second lens, a focal length value F5 of the fifth lens, a refractive index temperature coefficient dn / dt(2) of the second lens and a refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 9.5E+4≤(F2+F5) / (dn / dt(2)+dn / dt(5))≤3E+5; A curvature radius R7 of a second side of the third lens and a curvature radius R8 of a first side of the fourth lens satisfy: 4≤(R7-R8) / (R7+R8)≤22; A sag value SAG10 corresponding to a maximum aperture of a first side of the fifth lens and a sag value SAG11 corresponding to a maximum aperture of a second side of the fifth lens satisfy: 6≥|SAG10 / SAG11|≥2.5; The sag value SAG10 corresponding to the maximum aperture of the first side of the fifth lens and a maximum light passing aperture D10 of the first side of the fifth lens satisfy: 0.6≥|SAG10 / (D10 / 2)|≥0.25; A sag value SAG6 corresponding to a maximum light passing aperture D6 of a first side of the third lens and the maximum light passing aperture D6 of the first side of the third lens satisfy: |SAG6 / (D6 / 2)|≤0.15; A maximum light passing aperture D1 of a first side of the first lens and a curvature radius R1 of the first side of the first lens satisfy: |D1 / R1|≤0.4; A center thickness d6 of the third lens, a center thickness d8 of the fourth lens, a center thickness d10 of the fifth lens and a combined focal length value F345 of the third lens, the fourth lens and the fifth lens satisfy: 2.2≥(d6+d8+d10) / F345≥1.1; A curvature radius R1 of a first side of the first lens and a curvature radius R2 of a second side of the first lens satisfy: -16.117≤R1 / R2≤-10.

32. The optical lens of any of claims 1 to 8, wherein, The optical lens satisfies at least one of the following conditions: A refractive index Nd1 of the first lens satisfies: 1.773≥Nd1≥1.7; An entire group focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: 0.718≤F / ENPD≤0.727; An optical total length of the optical lens, i.e., a distance TTL from a first side center of a first lens of the optical lens to a center of an imaging surface of the optical lens, a maximum field angle of the optical lens corresponding to an image height H and a maximum field angle FOV of the optical lens satisfy: 0.040≤TTL / H / FOV≤0.044; The maximum field angle FOV of the optical lens, the entire group focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 80.898≥(FOV×F) / H≥77.747; When the first side of the second lens is concave and the second side of the second lens is convex, the curvature radius R3 of the first side of the second lens and the integral group focal length F of the optical lens satisfy: -4.1724 = R3 / F = -4.1708; and / or the curvature radius R4 of the second side of the second lens and the integral group focal length F of the optical lens satisfy: -9.934 = R4 / F = -6.224; When the first side of the second lens is convex and the second side of the second lens is concave, the curvature radius R3 of the first side of the second lens and the integral group focal length F of the optical lens satisfy: 23.2637 = R3 / F = 25.4227; the curvature radius R4 of the second side of the second lens and the integral group focal length F of the optical lens satisfy: 6.9897 = R4 / F = 8.2103; The focal length F2 of the second lens and the integral group focal length F of the optical lens satisfy: 28.632 = |F2 / F| = 14.547; The focal length F1 of the first lens and the integral group focal length F of the optical lens satisfy: 2.324 = |F1 / F| = 2.641; The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy: 0.874 = F3 / F4 = 1.172; The combined focal length F12 of the first lens and the second lens and the combined focal length F345 of the third lens, the fourth lens and the fifth lens satisfy: 0.743 = |F12 / F345| = 0.998; The curvature radius R2 of the second side of the first lens and the maximum light aperture D2 of the second side of the first lens satisfy: 0.568 = R2 / D2 = 0.659; The focal length F5 of the fifth lens and the integral group focal length F of the optical lens satisfy: 5.427 = F5 / F = 5.573; The central thickness d8 of the fourth lens and the total optical length of the optical lens, that is, the center distance TTL from the first side center of the first lens of the optical lens to the imaging surface of the optical lens satisfy: 0.159 = d8 / TTL = 0.127; The curvature radius R7 of the second side of the third lens and the integral group focal length F of the optical lens satisfy: -5.641 = R7 / F = -4.561; The focal length F2 of the second lens, the focal length F5 of the fifth lens, the refractive index temperature coefficient dn / dt(2) of the second lens and the refractive index temperature coefficient dn / dt(5) of the fifth lens satisfy: 1.04E+05 = (F2+F5) / (dn / dt(2)+dn / dt(5)) = 2.65E+05; The curvature radius R7 of the second side of the third lens and the curvature radius R8 of the first side of the fourth lens satisfy: 4.576 = (R7-R8) / (R7+R8) = 20.273; A value of a sag SAG10 at a maximum aperture of a first side of the fifth lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 5.522≥|SAG10 / SAG11|≥3.305; A value of a sag SAG10 at a maximum aperture of a first side of the fifth lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 5.522≥|SAG10 / SAG11|≥3.305; A value of a sag SAG6 at a maximum aperture of a first side of the third lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 0.031≤|SAG6 / (D6 / 2)|≤0.093; A value of a sag SAG6 at a maximum aperture of a first side of the third lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 0.031≤|SAG6 / (D6 / 2)|≤0.093; A value of a sag SAG6 at a maximum aperture of a first side of the third lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 0.031≤|SAG6 / (D6 / 2)|≤0.093; A value of a sag SAG6 at a maximum aperture of a first side of the third lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 0.031≤|SAG6 / (D6 / 2)|≤0.093; A value of a sag SAG6 at a maximum aperture of a first side of the third lens and a value of a sag SAG11 at a maximum aperture of a second side of the fifth lens satisfy: 0.031≤|SAG6 / (D6 / 2)|≤0.093; 33. An electronic device, comprising: An imaging element for converting an optical image formed by the optical lens into an electric signal. An imaging element for converting an optical image formed by the optical lens into an electric signal.

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