Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device, the optical lens comprising: a first lens having optical power; a second lens having optical power; a third lens having positive optical power, a first side of the third lens and a second side of the third lens are both convex; a fourth lens having optical power, a first side of the fourth lens is convex, and a second side of the fourth lens is concave; a fifth lens having optical power, a first side of the fifth lens is convex, and a second side of the fifth lens is concave; a sixth lens having positive optical power, at least one of a first side of the sixth lens and a second side of the sixth lens is convex; and a seventh lens having optical power, a face type of a first side of the seventh lens and a second side of the seventh lens is opposite. The application solves at least one problem that an optical lens in the prior art has serious chromatic aberration, distortion and other aberration problems, is affected by ghost images to cause poor picture definition, and cannot simultaneously meet the requirements of high resolution and miniaturization.

Description

TECHNICAL FIELD

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

[0002] With the development of technology, the application scenarios of optical lenses gradually increase, and the requirements of users on the optical performance of optical lenses also gradually increase. The structure of optical lenses is developing towards miniaturization, which leads to the development of optical lenses towards miniaturization. The resolution of miniaturized optical lenses is insufficient, the aberration problems such as chromatic aberration and distortion are serious, and the clarity is limited. The vehicle-mounted lens is a key component for the automatic driving auxiliary system to obtain external information. With the rapid development of the automatic driving auxiliary system, the performance requirements of vehicle-mounted optical lenses are also increasing.

[0003] With the development of automotive intelligence, advanced driver assistance systems (ADAS) have become an indispensable part of vehicles, and vehicle-mounted lenses are the "advance guard" of the entire ADAS system. Through front, rear and surround view cameras, the vehicle can obtain all-around information inside and outside the vehicle, help the driver obtain road information, and help the driver make correct judgments to avoid adverse consequences caused by limited vision. In order to meet the market demand of automatic driving and other application scenarios, in complex and changeable road environments, not only the targets close to the vehicle need to be paid attention to, but also the targets far away need to be paid attention to. In order to obtain long-distance perception and further improve the driver's judgment of the captured picture of the lens, the lens is required to have the performance of clear imaging in a long focal length and a small field of view angle range and small ghost image influence.

[0004] That is, at least one of the problems that the optical lens in the prior art has serious chromatic aberration, distortion and other aberration problems, is affected by ghost images to cause poor picture clarity, and cannot simultaneously meet the requirements of high resolution and miniaturization. SUMMARY

[0005] The main purpose of the present application is to provide an optical lens and an electronic device to solve at least one of the problems that the optical lens in the prior art has serious chromatic aberration, distortion and other aberration problems, is affected by ghost images to cause poor picture clarity, and cannot simultaneously meet the requirements of high resolution and miniaturization.

[0006] To achieve the above object, according to one 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 optical power; a second lens having optical power; a third lens having positive optical power, the first side of the third lens and the second side of the third lens are both convex; a fourth lens having optical power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave; a fifth lens having optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave; a sixth lens having positive optical power, at least one of the first side of the sixth lens and the second side of the sixth lens is convex; and a seventh lens having optical power, the face type of the first side of the seventh lens and the second side of the seventh lens are opposite.

[0007] Further, the first lens has negative optical power, the first side of the first lens is concave, and the second side of the first lens is concave.

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

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

[0010] Further, the first lens has positive optical power, the first side of the first lens is convex, and the second side of the first lens is convex.

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

[0012] Further, the second lens has positive optical power, the first side of the second lens is convex, and the second side of the second lens is convex.

[0013] Further, the second lens has negative optical power, the first side of the second lens is convex, and the second side of the second lens is concave.

[0014] Further, the second lens has negative optical power, the first side of the second lens is concave, and the second side of the second lens is concave.

[0015] Further, the fourth lens has positive optical power.

[0016] Further, the fourth lens has negative optical power.

[0017] Further, the fifth lens has negative optical power.

[0018] Further, the fifth lens has positive optical power.

[0019] Further, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0020] Further, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

[0021] Further, the first side surface of the sixth lens is a concave surface, and the second side surface of the sixth lens is a convex surface.

[0022] Further, the seventh lens has a negative focal length, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

[0023] Further, the seventh lens has a positive focal length, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface.

[0024] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0025] Further, the optical lens further comprises a diaphragm, and the diaphragm is arranged between the second lens and the third lens.

[0026] Further, the first side surface of the seventh lens and the second side surface of the seventh lens have an inflection point.

[0027] Further, the second side surface of the second lens has an inflection point.

[0028] Further, the second lens and the seventh lens are aspherical lenses.

[0029] Further, the total track length TTL of the optical lens and the total focal length F of the optical lens satisfy: TTL / F≤4.

[0030] Further, the radius of curvature R2 of the second side surface of the first lens of the optical lens and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: -6≤R2 / D2≤5.

[0031] Further, the focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy: |F7 / F|≤35.

[0032] Further, the entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy: F / ENPD≤2.

[0033] Further, the optical back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: BFL / TTL≥0.05.

[0034] Further, a focal length value F4 of the fourth lens and a focal length value F5 of the fifth lens satisfy: -2≤F4 / F5≤-0.3.

[0035] Further, a focal length value F3 of the third lens and a focal length value F6 of the sixth lens satisfy: F3 / F6≤3.

[0036] Further, a focal length value F3 of the third lens and a focal length value F7 of the seventh lens satisfy: F3 / F7≤0.5.

[0037] Further, a curvature radius R9 of the first side surface of the fifth lens and a total focal length value F of the optical lens satisfy: R9 / F≥2.

[0038] Further, a curvature radius R13 of the first side surface of the seventh lens and a focal length value F7 of the seventh lens satisfy: R13 / F7≤-0.1.

[0039] Further, a focal length value F6 of the sixth lens and a total focal length value F of the optical lens satisfy: F6 / F≤1.5.

[0040] Further, an air interval d12 between the sixth lens and the seventh lens, and a total track length TTL of the optical lens satisfy: d12 / TTL≥0.1.

[0041] Further, a focal length value F3 of the third lens, a focal length value F4 of the fourth lens, a curvature radius R7 of the second side surface of the third lens, and a curvature radius R8 of the first side surface of the fourth lens satisfy: F3 / R7+F4 / R8≤3.

[0042] Further, a curvature radius R6 of the first side surface of the third lens and a curvature radius R7 of the second side surface of the third lens satisfy: R6 / R7≥-0.8.

[0043] Further, a curvature radius R11 of the first side surface of the sixth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: R11 / R12≤22.

[0044] Further, a curvature radius R2 of the second side surface of the first lens and a total focal length value F of the optical lens satisfy: |R2 / F|≤4.

[0045] 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 optical power; a second lens having optical power; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having positive optical power; a seventh lens having optical power; a radius of curvature R9 of a first side surface of the fifth lens and an overall focal length value F of the optical lens satisfy: R9 / F≥2.

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

[0047] Further, the first lens has negative optical power, the first side surface of the first lens is concave, and the second side surface of the first lens is convex.

[0048] Further, the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0049] Further, the first lens has positive optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is convex.

[0050] Further, the second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave.

[0051] Further, the second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is convex.

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

[0053] Further, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is concave.

[0054] Further, the first side surface of the third lens and the second side surface of the third lens are both convex.

[0055] Further, the fourth lens has positive optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave.

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

[0057] Further, the fifth lens has negative optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave.

[0058] Further, the fifth lens has positive refractive power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave.

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

[0060] Further, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0061] Further, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex.

[0062] Further, the seventh lens has negative refractive power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave.

[0063] Further, the seventh lens has positive refractive power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex.

[0064] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0065] Further, the optical lens further comprises a diaphragm, and the diaphragm is arranged between the second lens and the third lens.

[0066] Further, the first side surface of the seventh lens and the second side surface of the seventh lens have inflection points.

[0067] Further, the second side surface of the second lens has an inflection point.

[0068] Further, the second lens and the seventh lens are aspherical lenses.

[0069] Further, the total track length TTL of the optical lens and the total focal length F of the optical lens satisfy: TTL / F≤4.

[0070] Further, the radius of curvature R2 of the second side surface of the first lens of the optical lens and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: -6≤R2 / D2≤5.

[0071] Further, the focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy: |F7 / F|≤35.

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

[0073] Further, the optical back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: BFL / TTL≥0.05.

[0074] Further, a focal length value F4 of the fourth lens and a focal length value F5 of the fifth lens satisfy: -2≤F4 / F5≤-0.3.

[0075] Further, a focal length value F3 of the third lens and a focal length value F6 of the sixth lens satisfy: F3 / F6≤3.

[0076] Further, a focal length value F3 of the third lens and a focal length value F7 of the seventh lens satisfy: F3 / F7≤0.5.

[0077] Further, a curvature radius R13 of the first side surface of the seventh lens and a focal length value F7 of the seventh lens satisfy: R13 / F7≤-0.1.

[0078] Further, a focal length value F6 of the sixth lens and a total focal length value F of the optical lens satisfy: F6 / F≤1.5.

[0079] Further, an air interval d12 between the sixth lens and the seventh lens, and a total track length TTL of the optical lens satisfy: d12 / TTL≥0.1.

[0080] Further, a focal length value F3 of the third lens, a focal length value F4 of the fourth lens, a curvature radius R7 of the second side surface of the third lens, and a curvature radius R8 of the first side surface of the fourth lens satisfy: F3 / R7+F4 / R8≤3.

[0081] Further, a curvature radius R6 of the first side surface of the third lens and a curvature radius R7 of the second side surface of the third lens satisfy: R6 / R7≥-0.8.

[0082] Further, a curvature radius R11 of the first side surface of the sixth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: R11 / R12≤22.

[0083] Further, a curvature radius R2 of the second side surface of the first lens and a total focal length value F of the optical lens satisfy: |R2 / F|≤4.

[0084] According to another aspect of the present application, there is provided an electronic device, the optical lens described above, and an imaging element for converting an optical image formed by the optical lens into an electric signal.

[0085] The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from a first side to a second side, the first lens has optical power, the second lens has optical power, the third lens has positive optical power, the first side of the third lens and the second side of the third lens are both convex, the fourth lens has optical power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave, the fifth lens has optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave, the sixth lens has positive optical power, at least one of the first side of the sixth lens and the second side of the sixth lens is convex, and the first side of the seventh lens and the second side of the seventh lens are opposite in shape.

[0086] The first lens has negative optical power, the first side of the first lens is concave, and the second side of the first lens is concave. The first lens is arranged as a negative lens, which is beneficial to properly diffuse light, and the first lens is arranged in a double-concave shape, so that light can enter the rear optical system correctly and smoothly, improve the resolving power of the optical lens, and collect as much light as possible in a large field of view to enter the rear optical system and increase the light throughput of the optical lens. The first lens is a spherical lens, which can be coated with a waterproof film on the first lens and is beneficial to reducing processing cost.

[0087] The first lens has negative optical power, the first side of the first lens is concave, and the second side of the first lens is convex. The first lens is arranged as a negative lens, and the first side is concave, so that the first side of the first lens has a diverging effect on light, avoiding too much concentration of object-side light, and the convex second side of the first lens cooperates with the concave first side, which is beneficial to controlling the aperture of the rear lens and designing the optical lens to be small in size.

[0088] The first lens has negative optical power, the first side of the first lens is convex, and the second side of the first lens is concave. The convex first side of the first lens is used to collect as much light as possible in a large field of view to enter the rear optical system, which is beneficial to increasing the light throughput of the optical lens, improving illumination, and controlling the aperture of the rear lens to achieve small-aperture design. The first lens is arranged to have negative optical power, and the second side is arranged to be concave, which can control the direction of light at a large angle at the edge of the lens, is beneficial to smooth transition of light, and can reduce the sensitivity of the optical lens.

[0089] The first lens has positive focal power, the first side surface of the first lens is convex, and the second side surface of the first lens is convex. The first lens is provided as positive focal power and double-convex surface, which is beneficial to collect more light into the optical lens and improve the overall illumination of the optical lens. The second side surface of the first lens is provided as convex, which is beneficial to compress the rear light and realize small aperture and miniaturization design.

[0090] The second lens has positive focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens is provided as positive focal power and the shape of the first side surface is convex, which is beneficial to fill the pupil with more light and improve the illumination of the imaging surface. The light emitted by the second lens is well received by the third lens, and the trend of the light is changed, so that the rear optical system is more gentle.

[0091] The second lens has positive focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is convex. The second lens is provided as positive focal power, which converges the light. The first lens with negative focal power is beneficial to the gentle entry of the light into the rear lens and improves the resolution. Meanwhile, the first side surface of the second lens is provided as convex, which changes the trend of the edge light and realizes the reduction of the front aperture of the optical lens, reduces the volume of the optical lens, is beneficial to miniaturization and cost reduction.

[0092] The second lens has negative focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens is provided as negative focal power, and the first side surface of the second lens is convex, which can further converge the light, reduce the light aperture, avoid the excessive divergence of the object light, and make the light trend smooth and transition by the concave second side surface, which is beneficial to control the aperture of the rear lens and realize miniaturization.

[0093] The second lens has negative focal power, the first side surface of the second lens is concave, and the second side surface of the second lens is concave. The second lens is provided as negative focal power and double-concave structure, which has a diverging effect on the light, can disperse the center light and the edge light of each field of view, expand the aperture of the diaphragm, increase the illumination of the optical lens, and is beneficial to the aberration correction of the edge light and the center light to realize high resolution.

[0094] The third lens has positive refractive power, the first side surface of the third lens and the second side surface of the third lens are both convex, the third lens is arranged as positive refractive power, and the third lens has a converging effect on light rays, which on the one hand makes the light rays emitted by the second lens smoothly enter the rear optical system, and on the other hand reduces the angle of the light rays entering the rear optical system, reduces the rear aperture of the optical lens, and realizes miniaturization. The third lens is arranged as a double-convex structure, so that the light rays emitted by the second lens smoothly transition to the rear, thereby reducing sensitivity, which is conducive to reducing aberration and improving resolving power. Meanwhile, the light rays emitted by the second lens are well received by the third lens, reducing the loss of light rays in each field of view and improving the relative luminance in each field of view.

[0095] The fourth lens has positive refractive power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The fourth lens has positive refractive power, and the first side surface is convex to receive the second side surface of the third lens which is also convex. The light rays have approximately the same trend at the second side surface of the third lens and the first side surface of the fourth lens, and the light rays are not greatly deflected, effectively reducing the loss of light energy caused by reflection between lenses and improving the luminance of the image plane. Controlling the image side surface of the fourth lens to be concave is conducive to the optical lens having a long back focus.

[0096] The fourth lens has negative refractive power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The fourth lens is a glass spherical surface convex to the first side, and cooperates with the second side surface of the third lens which is also convex. The fourth lens having negative refractive power is conducive to collecting the light rays incident through the third lens and appropriately diverging, so that the light rays smoothly transition.

[0097] The fifth lens has negative refractive power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave. The fifth lens is arranged as negative refractive power, and the fifth lens has a diverging effect on light rays. Meanwhile, the fifth lens is arranged as a concave-to-image-side crescent shape, which is conducive to collecting the light rays emitted by the fourth lens, so that the light rays smoothly transition. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, the image quality is improved, and the optical performance such as distortion and CRA is optimized.

[0098] The fifth lens has positive refractive power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave. The fifth lens is arranged as positive refractive power, and the fifth lens is a positive lens in a cemented lens. The fifth lens cooperates with the fourth lens having negative refractive power to correct the chromatic aberration of the optical lens. The convex-concave structure can reduce the deflection degree of the light rays emitted by the front lens, which is conducive to the smooth passing of light rays, reduces the light energy loss at the interface, improves the relative luminance, and reduces the sensitivity of the optical lens.

[0099] The sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is arranged to have positive refractive power and the image side surface is concave, which is beneficial to light convergence, reduces the aperture and total length of the optical lens, and is beneficial to miniaturization of the optical lens. Meanwhile, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is beneficial to reducing ghosting risk.

[0100] The sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is arranged to have positive refractive power and the image side surface is concave, which is beneficial to light convergence, reduces the aperture and total length of the optical lens, and is beneficial to miniaturization of the optical lens. Meanwhile, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is beneficial to reducing ghosting risk.

[0101] The sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is arranged to have positive refractive power and the image side surface is concave, which is beneficial to light convergence, reduces the aperture and total length of the optical lens, and is beneficial to miniaturization of the optical lens. Meanwhile, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is beneficial to reducing ghosting risk.

[0102] The seventh lens has negative refractive power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The second side surface of the seventh lens is concave and has a large curvature radius, and the surface is relatively flat, which is beneficial to realizing small CRA and ensuring light flux. The seventh lens has negative refractive power and the second side surface is concave, so that the light rays are upwardly convergent after passing through the second side surface of the sixth lens, the height of the light rays on the imaging surface can be rapidly accumulated, and the imaging range can be expanded.

[0103] The seventh lens has positive refractive power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The seventh lens has positive refractive power and the shape of the seventh lens is flat, and the seventh lens is an aspheric lens. The aspheric lens has different curvature radii, which can balance aberration caused by the front lens and improve the resolution of the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0104] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0105] Figure 1An optical lens structure schematic diagram of an example one of the present application is shown.

[0106] Figure 2 An optical lens structure schematic diagram of an example two of the present application is shown.

[0107] Figure 3 An optical lens structure schematic diagram of an example three of the present application is shown.

[0108] Figure 4 An optical lens structure schematic diagram of an example four of the present application is shown.

[0109] Figure 5 An optical lens structure schematic diagram of an example five of the present application is shown.

[0110] Figure 6 An optical lens structure schematic diagram of an example six of the present application is shown.

[0111] Figure 7 An optical lens structure schematic diagram of an example seven of the present application is shown.

[0112] Figure 8 An optical lens structure schematic diagram of an example eight of the present application is shown.

[0113] Figure 9 An optical lens structure schematic diagram of an example nine of the present application is shown.

[0114] Figure 10 An optical lens structure schematic diagram of an example ten of the present application is shown.

[0115] Figure 11 An optical lens structure schematic diagram of an example eleven of the present application is shown.

[0116] Figure 12 An optical lens structure schematic diagram of an example twelve of the present application is shown. DETAILED DESCRIPTION

[0117] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0118] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0119] In the present application, the orientation words such as "upper", "lower", "top", "bottom" used without the opposite description are generally directed to the direction shown in the drawings or the vertical, perpendicular or gravity direction 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.

[0120] 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.

[0121] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for the convenience of illustration. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not strictly drawn to scale.

[0122] In this context, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the object side is referred to as the first side surface of the lens, and the surface of each lens near the image 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 those skilled in the art, with the positive and negative R values (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of 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; in terms of 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.

[0123] The present application generally protects ordinary optical lenses, and in the drawings, the left side is the object side and the right side is the image side, that is, the first side surface is the object side surface and the second side surface is the image side surface.

[0124] In exemplary embodiments, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. Light rays from the object side can be imaged on the image side.

[0125] When the optical lens in the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided 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 from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0126] In order to solve at least one problem of the prior art optical lens, such as serious aberration, poor picture definition caused by ghost image, and inability to simultaneously meet the requirements of high resolution and miniaturization, the present application provides an optical lens and an electronic device.

[0127] Embodiment one

[0128] As shown in Figures 1 to 12 the optical lens sequentially comprises, from the first side to the second side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, the first lens has optical power; the second lens has optical power; the third lens has positive optical power, the first side surface of the third lens and the second side surface of the third lens are both convex surfaces; the fourth lens has optical power, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface; the fifth lens has optical power, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface; the sixth lens has positive optical power, at least one of the first side surface of the sixth lens and the second side surface of the sixth lens is a convex surface; and the seventh lens has optical power, the face type of the first side surface of the seventh lens and the second side surface of the seventh lens is opposite.

[0129] Optionally, the first lens has negative optical power, the first side surface of the first lens is a concave surface, and the second side surface of the first lens is a concave surface. The first lens is set as a negative lens, which is beneficial to properly diffuse the light, and at the same time, the first lens is set as a double-concave shape, so that the light can enter the rear optical system correctly and smoothly, improve the resolution of the optical lens, and at the same time, collect as much field of view light as possible into the rear optical system, thereby increasing the light flux of the optical lens. The first lens is a spherical lens, which can be coated with a waterproof film on the first lens, and at the same time, is beneficial to reduce the processing cost.

[0130] Optionally, the first lens has negative optical power, the first side surface of the first lens is a concave surface, and the second side surface of the first lens is a convex surface. The first lens is set as a negative lens, and the first side surface is a concave surface, so that the first side surface of the first lens has a diverging effect on the light, avoiding the light on the object side being too concentrated, and the second side surface of the first lens is a convex surface which cooperates with the concave first side surface, which is beneficial to control the aperture of the rear lens and is beneficial to the design of the optical lens in the direction of miniaturization.

[0131] Optionally, the first lens has negative focal power, the first side of the first lens is convex, and the second side of the first lens is concave. The first side of the first lens is convex to collect as much light as possible into the rear optical system, which is conducive to increasing the light quantity of the optical lens and improving the illumination, and is also conducive to controlling the aperture of the rear lens to achieve a small-aperture design. The first lens is set to negative focal power, and the second side is set to concave, which can control the direction of the light at the edge of the lens at a large angle, is conducive to the smooth transition of the light, and can reduce the sensitivity of the optical lens.

[0132] Optionally, the first lens has positive focal power, the first side of the first lens is convex, and the second side of the first lens is convex. The first lens is set to positive focal power and has a double-convex surface, which is conducive to collecting more light into the optical lens and improving the overall illumination of the optical lens. The second side of the first lens is set to convex, which has a converging effect on the light and is conducive to compressing the light in the rear and achieving a small-aperture and small-size design.

[0133] Optionally, the second lens has positive focal power, the first side of the second lens is convex, and the second side of the second lens is concave. The second lens is set to positive focal power and has a meniscus structure with the first side being convex, which allows the light to fill the pupil as much as possible and is conducive to improving the illumination of the imaging surface. The light emitted by the second lens is well received by the third lens, which changes the direction of the light and makes the rear optical system more gentle.

[0134] Optionally, the second lens has positive focal power, the first side of the second lens is convex, and the second side of the second lens is convex. The second lens is set to positive focal power, which has a converging effect on the light. In combination with the first lens having negative focal power, the light can enter the rear lens more gently and improve the resolution. The first side of the second lens is set to convex, which changes the direction of the edge light and reduces the aperture at the front end of the optical lens, thereby reducing the size of the optical lens and reducing costs.

[0135] Optionally, the second lens has negative focal power, the first side of the second lens is convex, and the second side of the second lens is concave. The second lens is set to negative focal power, and the first side of the second lens is convex, which can further converge the light and reduce the light aperture to avoid excessive divergence of the object light. In combination with the second side being concave, the light direction is smooth and transitioned, which is conducive to controlling the aperture of the rear lens and achieving miniaturization.

[0136] Optionally, the second lens has negative focal power, the first side of the second lens is concave, and the second side of the second lens is concave. The second lens is arranged to have negative focal power and is double-concave, has a diverging effect on light rays, can disperse central light rays and edge light rays of each field of view, expand the aperture of the diaphragm, increase the illumination of the optical lens, and is conducive to aberration correction of the edge light rays and the central light rays to achieve high resolution.

[0137] In the embodiment, the third lens has positive focal power, the first side of the third lens is convex, and the second side of the third lens is convex. The third lens is arranged to have positive focal power and has a converging effect on light rays, which on the one hand enables the light rays emitted by the second lens to smoothly enter the rear optical system, and on the other hand reduces the angle of the light rays entering the rear optical system, reduces the rear aperture of the optical lens, and achieves miniaturization. The third lens is arranged to be double-convex, which enables the light rays emitted by the second lens to smoothly transition to the rear, thereby reducing sensitivity, reducing aberration, and improving resolution. Meanwhile, the light rays emitted by the second lens are well received by the third lens, reducing the loss of light rays of each field of view and improving the relative illumination of each field of view.

[0138] Optionally, the fourth lens has positive focal power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave. The fourth lens has positive focal power, the first side is convex to receive the second side of the third lens which is also convex, the light rays have substantially the same trend at the second side of the third lens and the first side of the fourth lens, the light rays are not greatly deflected, effectively reducing the loss of light energy caused by reflection between lenses, and improving the illumination of the image plane. The image side of the fourth lens is controlled to be concave, which is conducive to the optical lens having a long back focus.

[0139] Optionally, the fourth lens has negative focal power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave. The fourth lens is a glass spherical surface convex to the first side, cooperates with the second side of the third lens which is also convex, and the fourth lens having negative focal power is conducive to collecting the light rays incident through the third lens and appropriately diverging the light rays to smoothly transition the trend of the light rays.

[0140] Optionally, the fifth lens has negative focal power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave. The fifth lens is arranged to have negative focal power, has a diverging effect on light rays, and the fifth lens is arranged to be concave to the image side in a meniscus shape, which is conducive to collecting the light rays emitted by the fourth lens to smoothly transition the trend of the light rays. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, the image quality is improved, and optical properties such as distortion and CRA are optimized.

[0141] Optionally, the fifth lens has positive refractive power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave. The fifth lens is arranged as a positive lens in the cemented lens, and the combination of the fourth lens with negative refractive power is beneficial to correcting chromatic aberration of the optical lens. The convex-concave structure can reduce the deflection degree of the light rays exiting the front lens, is beneficial to the smooth passing of the light rays, reduces the light energy loss at the interface, improves the relative luminance, and reduces the sensitivity of the optical lens.

[0142] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is arranged as a positive lens, and the image side surface is arranged as a concave surface, which is beneficial to converging the light rays and reducing the aperture and the total length of the optical lens, and is beneficial to miniaturization of the optical lens. Meanwhile, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is beneficial to reducing the ghost risk.

[0143] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens is arranged as a positive lens and has a double-convex shape, so that the sixth lens can further converge the light rays, effectively reduces the aperture and the total length of the rear optical system, and can effectively correct the chromatic aberration of the optical lens in combination with the seventh lens. The second side surface of the fifth lens and the first side surface of the sixth lens are obviously different in shape, the sixth lens obviously changes the trend of the light rays, and in the case of the same aperture of the sixth lens, the aperture of the front end of the optical lens can be reduced, so that the optical lens is miniaturized.

[0144] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex. The sixth lens is arranged as a positive lens, and the incident light rays of the front end lens can be converged to the seventh lens, which is beneficial to controlling the size of the CRA. Meanwhile, the surface shape of the first side surface of the sixth lens is relatively flat, which is beneficial to reducing the sensitivity of the optical lens and improving the overall resolution.

[0145] Optionally, the seventh lens has negative refractive power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The second side surface of the seventh lens is concave and has a large curvature radius, and the surface shape is relatively flat. When the light rays pass through the second side surface of the seventh lens, the light rays have a small change in the trend, which is beneficial to realizing small CRA and ensuring the light flux. The seventh lens has negative refractive power, and the second side surface is concave. After the light rays pass through the second side surface of the sixth lens, the light rays have a tendency to converge upward, so that the height of the light rays on the imaging surface can be rapidly accumulated, which is beneficial to expanding the imaging range.

[0146] Optionally, the seventh lens has positive refractive power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex. The seventh lens has positive refractive power, and the shape of the seventh lens is gentle. The seventh lens is an aspherical lens, and the aspherical lens has different curvature radii, which can balance aberrations caused by the front lens and improve the resolving power of the optical lens.

[0147] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. Such an arrangement facilitates smooth transition of light passing through the front lens into the rear optical lens, reduces the overall length of the optical lens, and optimizes various optical properties such as resolution, distortion, and CRA while keeping the structure compact. The cemented lens can reduce the air gap between the two lenses, reduce the overall length of the optical lens, and complement the chromatic dispersion of the two lenses to reduce chromatic aberration and improve imaging quality. In addition, the cemented lens reduces the number of components between the two lenses, reduces the number of processes, and reduces costs. Furthermore, the cemented lens can reduce field curvature, correct off-axis aberrations of the optical lens, and reasonably distribute focal length to facilitate thermal compensation and achieve good temperature performance.

[0148] In the embodiment, the optical lens further includes a diaphragm arranged between the second lens and the third lens. Arranging the diaphragm between the second lens and the third lens facilitates effective collection of light entering the optical lens, reduces the lens aperture at the rear end of the optical lens, and reduces the assembly sensitivity of the optical lens.

[0149] Optionally, the first side surface of the seventh lens and the second side surface of the seventh lens have inflection points.

[0150] Optionally, the second side surface of the second lens has an inflection point. The inflection point facilitates balancing aberrations and improving resolving power.

[0151] In the embodiment, the second lens and the seventh lens are aspherical lenses. The use of two aspherical lenses facilitates correction of aberrations of the optical lens and improves resolving power.

[0152] In the embodiment, the optical total length TTL of the optical lens and the overall focal length F of the optical lens satisfy TTL / F≤4. Limiting TTL / F to a reasonable range can effectively limit the length of the optical lens and facilitate miniaturization of the optical lens. Preferably, TTL / F≤3.

[0153] In the embodiment, the radius of curvature R2 of the second side surface of the first lens of the optical lens and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: -6≤R2 / D2≤5. Reasonably setting the ratio of the radius of curvature and the aperture of the second side surface of the first lens is conducive to reducing the height of the light entering the second lens, conducive to realizing a small aperture, while taking into account the machinability of the lens, and avoiding that the first lens is difficult to be formed due to too small radius of curvature. Preferably, -5≤R2 / D2≤4.

[0154] In the embodiment, the focal length value F7 of the seventh lens and the total focal length value F of the optical lens satisfy: |F7 / F|≤35. Reasonably allocating the focal length of the seventh lens can make the light enter the optical system smoothly, while being conducive to light collection, ensuring the light quantity, and improving the resolution. Preferably, |F7 / F|≤32.

[0155] In the embodiment, the entrance pupil diameter ENPD of the optical lens and the total focal length value F of the optical lens satisfy: F / ENPD≤2. Setting in this way makes the optical lens have a smaller FNO, which is conducive to increasing the light quantity, and the increase of the entrance pupil diameter helps to improve the relative luminance, which is conducive to clear imaging of the optical lens in a dark environment. Preferably, F / ENPD≤1.8.

[0156] In the embodiment, the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≥0.05. Setting in this way is conducive to realizing a long back focal length of the optical lens, while reserving space for the installation and focusing of the optical elements, and avoiding interference between the optical elements. Preferably, BFL / TTL≥0.1.

[0157] In the embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: -2≤F4 / F5≤-0.3. Setting in this way makes the focal length of the fourth lens and the fifth lens similar, which is helpful for the smooth transition of light and the correction of chromatic aberration. Preferably, -1.8≤F4 / F5≤-0.5.

[0158] In the embodiment, the focal length value F3 of the third lens and the focal length value F6 of the sixth lens satisfy: F3 / F6≤3. Reasonably setting the focal length ratio of the third lens and the sixth lens is conducive to better adjusting chromatic aberration and improving the resolution of the optical lens. Preferably, 1≤F3 / F6≤2.5.

[0159] In the embodiment, the focal length value F3 of the third lens and the focal length value F7 of the seventh lens satisfy: F3 / F7≤0.5. Reasonably setting the focal length ratio of the third lens and the seventh lens is conducive to better adjusting chromatic aberration and improving the resolution. Preferably, F3 / F7≤0.25.

[0160] In the embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the overall focal length F of the optical lens satisfy: R9 / F≥2. Controlling R9 / F within a reasonable range can help the light rays to be smooth, especially the light rays of the edge field of view, so that the aberration can be better corrected, the imaging quality of the optical lens is improved, and high resolving power is achieved. Preferably, R9 / F≥2.5.

[0161] In the embodiment, the radius of curvature R13 of the first side surface of the seventh lens and the focal length F7 of the seventh lens satisfy: R13 / F7≤-0.1. Controlling R13 / F7 within a reasonable range can help the light rays to be smooth, especially the light rays of the edge field of view, so that the aberration can be better corrected, the imaging quality of the optical lens is improved, and high resolving power is achieved. Preferably, -15≤R13 / F7≤-0.15.

[0162] In the embodiment, the focal length F6 of the sixth lens and the overall focal length F of the optical lens satisfy: F6 / F≤1.5. The focal length of the sixth lens is small, and the secondary reflection between lenses is less likely to occur, thereby reducing the risk of ghost image and improving the resolving power of the optical lens. Preferably, F6 / F≤1.2.

[0163] In the embodiment, the air gap d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy: d12 / TTL≥0.1. Such a setting makes the sixth lens and the seventh lens have a certain spatial interval, which is conducive to the smooth transition of light rays and reduces the risk of reflection at the edge of the lens. Preferably, d12 / TTL>0.12.

[0164] In the embodiment, the focal length F3 of the third lens, the focal length F4 of the fourth lens, the radius of curvature R7 of the second side surface of the third lens, and the radius of curvature R8 of the first side surface of the fourth lens satisfy: F3 / R7+F4 / R8≤3. By controlling F3 / R7+F4 / R8 within a reasonable range, the reflected light rays from the fourth lens to the seventh lens can be effectively prevented from producing ghost images on the second side surface of the third lens, the ghost image on the imaging surface is reduced, and the imaging quality of the optical lens is effectively improved. Preferably, -5≤F3 / R7+F4 / R8≤1.8.

[0165] In the embodiment, the radius of curvature R6 of the first side surface of the third lens and the radius of curvature R7 of the second side surface of the third lens satisfy: R6 / R7≥-0.8. Reasonably setting the curvature radius of the third lens is conducive to the smooth transition of light rays and reduces the tolerance sensitivity of the optical lens. Preferably, -0.7≤R6 / R7<0.

[0166] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the condition: R11 / R12≤22. By appropriately setting the radius of curvature of the sixth lens, aberrations in the optical lens can be corrected, and the tolerance sensitivity of the optical lens can be reduced. Preferably, -1.3≤R11 / R12≤20.

[0167] In this embodiment, the radius of curvature R2 of the second side surface of the first lens and the overall focal length F of the optical lens satisfy the condition |R2 / F|≤4. Reasonably controlling the radius of curvature of the second side surface of the first lens and the overall focal length of the optical lens helps to reduce the front-end light rays, thereby lowering the height at which light enters the second lens, reducing the front-end diameter, and facilitating the miniaturization of the optical lens. Preferably, |R2 / F|≤3.5.

[0168] Example 2

[0169] like Figures 1 to 12 As shown, the optical lens, from the first side to the second side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has optical power; the second lens has optical power; the third lens has positive optical power; the fourth lens has optical power; the fifth lens has optical power; the sixth lens has positive optical power; and the seventh lens has optical power. The radius of curvature R9 of the first side of the fifth lens satisfies the condition R9 / F ≥ 2 with the overall focal length F of the optical lens. Controlling R9 / F within a reasonable range can help smooth the light path, especially at the edges of the field of view, which can better correct aberrations, improve the imaging quality of the optical lens, and achieve high resolution. Preferably, R9 / F ≥ 2.5.

[0170] Optionally, the first lens has negative optical power, with both its first and second sides being concave. Setting the first lens as a negative lens facilitates proper light diffusion. Furthermore, its biconcave shape ensures that light enters the rear optical system smoothly and accurately, improving the lens's resolution. It also maximizes the collection of light from a wide field of view into the rear optical system, increasing the lens's light transmission. The first lens is a spherical lens, allowing for the addition of a waterproof coating and reducing manufacturing costs.

[0171] Optionally, the first lens has negative optical power, a first concave side surface, and a second convex side surface. Setting the first lens as a negative lens, with a concave first side surface, allows the first side surface to diverge light, preventing excessive concentration of object-side light. The convex second side surface, combined with the concave first side surface, helps control the aperture of the rear lens and facilitates the miniaturization of the optical lens design.

[0172] Optionally, the first lens has negative focal power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave. The first side surface of the first lens is convex to collect as many field-of-view light rays as possible into the rear optical system, which is conducive to increasing the light quantity of the optical lens and improving the illumination, and is also conducive to controlling the aperture of the rear lens to achieve a small-aperture design. The first lens is set to have negative focal power, and the second side surface is set to be concave, which can control the direction of the light rays at the edge of the lens at a large angle, is conducive to the smooth transition of the light rays, and can reduce the sensitivity of the optical lens.

[0173] Optionally, the first lens has positive focal power, the first side surface of the first lens is convex, and the second side surface of the first lens is convex. The first lens is set to have positive focal power and be double-convex, which is conducive to collecting more light rays into the optical lens and improving the overall illumination of the optical lens. The second side surface of the first lens is set to be convex, which has a converging effect on the light rays and is conducive to compressing the rear light rays to achieve a small-aperture and small-size design.

[0174] Optionally, the second lens has positive focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens is set to have positive focal power and be a meniscus structure convex to the first side surface, which allows the light rays to fill the pupil as much as possible and is conducive to improving the illumination of the imaging surface. The light rays emitted by the second lens are well received by the third lens, and the direction of the light rays is changed, making the rear optical system more gentle.

[0175] Optionally, the second lens has positive focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is convex. The second lens is set to have positive focal power, which has a converging effect on the light rays. In combination with the first lens having negative focal power, the light rays can enter the rear lens more gently, which improves the resolution. Meanwhile, the first side surface of the second lens is set to be convex, which changes the direction of the edge light rays, reduces the aperture at the front end of the optical lens, and reduces the volume of the optical lens, which is conducive to miniaturization and cost reduction.

[0176] Optionally, the second lens has negative focal power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens is set to have negative focal power, and the first side surface of the second lens is convex, which can further converge the light rays and reduce the aperture of the light rays to avoid excessive divergence of the object-side light rays. In combination with the second side surface being concave, the direction of the light rays is smooth and transitioned, which is conducive to controlling the aperture of the rear lens and achieving miniaturization.

[0177] Optionally, the second lens has negative focal power, the first side of the second lens is concave, and the second side of the second lens is concave. The second lens is arranged to have negative focal power and is double-concave, has a diverging effect on light rays, can disperse central light rays and edge light rays of each field of view, expand the aperture of the diaphragm, increase the illumination of the optical lens, and is conducive to aberration correction of the edge light rays and the central light rays to achieve high resolution.

[0178] In the embodiment, the third lens has positive focal power, the first side of the third lens is convex, and the second side of the third lens is convex. The third lens is arranged to have positive focal power and has a converging effect on light rays, which on the one hand enables the light rays emitted by the second lens to smoothly enter the rear optical system, and on the other hand reduces the angle of the light rays entering the rear optical system, reduces the rear aperture of the optical lens, and achieves miniaturization. The third lens is arranged to be double-convex, which enables the light rays emitted by the second lens to smoothly transition to the rear, thereby reducing sensitivity, reducing aberration, and improving resolution. Meanwhile, the light rays emitted by the second lens are well received by the third lens, reducing the loss of light rays of each field of view and improving the relative illumination of each field of view.

[0179] Optionally, the fourth lens has positive focal power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave. The fourth lens has positive focal power, the first side is convex to receive the second side of the third lens which is also convex, the light rays have substantially the same trend at the second side of the third lens and the first side of the fourth lens, the light rays are not greatly deflected, effectively reducing the loss of light energy caused by reflection between lenses, and improving the illumination of the image plane. The image side of the fourth lens is controlled to be concave, which is conducive to the optical lens having a long back focus.

[0180] Optionally, the fourth lens has negative focal power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave. The fourth lens is a glass spherical surface convex to the first side, cooperates with the second side of the third lens which is also convex, and the fourth lens having negative focal power is conducive to collecting the light rays incident through the third lens and appropriately diverging the light rays to smoothly transition the trend of the light rays.

[0181] Optionally, the fifth lens has negative focal power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave. The fifth lens is arranged to have negative focal power, has a diverging effect on light rays, and is arranged to be concave to the image side in a meniscus shape, which is conducive to collecting the light rays emitted by the fourth lens to smoothly transition the trend of the light rays. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, the image quality is improved, and optical properties such as distortion and CRA are optimized.

[0182] Optionally, the fifth lens has positive refractive power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave. The fifth lens is arranged as a positive lens in the cemented lens, and the combination of the fourth lens with negative refractive power is beneficial to correcting chromatic aberration of the optical lens. The convex-concave structure can reduce the deflection degree of the light rays exiting the front lens, is beneficial to the smooth passing of the light rays, reduces the light energy loss at the interface, improves the relative luminance, and reduces the sensitivity of the optical lens.

[0183] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. The sixth lens is arranged as a positive lens, and the image side surface is arranged as a concave surface, which is beneficial to converging the light rays and reducing the aperture and the total length of the optical lens, and is beneficial to miniaturization of the optical lens. Meanwhile, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is beneficial to reducing the ghost risk.

[0184] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The sixth lens is arranged as a positive lens and has a double-convex shape, so that the sixth lens can further converge the light rays, effectively reduces the aperture and the total length of the rear optical system, and can effectively correct the chromatic aberration of the optical lens in combination with the seventh lens. The second side surface of the fifth lens and the first side surface of the sixth lens are obviously different in shape, the sixth lens obviously changes the trend of the light rays, and in the case of the same aperture of the sixth lens, the aperture of the front end of the optical lens can be reduced, so that the optical lens is miniaturized.

[0185] Optionally, the sixth lens has positive refractive power, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex. The sixth lens is arranged as a positive lens, and can converge the incident light rays of the front end lens to the seventh lens, which is beneficial to controlling the size of the CRA. Meanwhile, the surface shape of the first side surface of the sixth lens is relatively flat, which is beneficial to reducing the sensitivity of the optical lens and improving the overall resolution.

[0186] Optionally, the seventh lens has negative refractive power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave. The second side surface of the seventh lens is concave and has a large curvature radius, and the surface shape is relatively flat. When the light rays pass through the second side surface of the seventh lens, the light rays have a small change in the trend, which is beneficial to realizing small CRA and ensuring the light flux. The seventh lens has negative refractive power and the second side surface is concave. After the light rays pass through the second side surface of the sixth lens, the light rays have a tendency to converge upward, so that the height of the light rays on the imaging surface can be rapidly accumulated, which is beneficial to expanding the imaging range.

[0187] Optionally, the seventh lens has positive refractive power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex. The seventh lens has positive refractive power, and the shape of the seventh lens is gentle. The seventh lens is an aspherical lens, and the aspherical lens has different curvature radii, which can balance aberrations caused by the front lens and improve the resolving power of the optical lens.

[0188] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. Such an arrangement facilitates smooth transition of light passing through the front lens into the rear optical lens, reduces the overall length of the optical lens, and optimizes various optical properties such as resolution, distortion, and CRA while keeping the structure compact. The cemented lens can reduce the air gap between the two lenses, reduce the overall length of the optical lens, and complement the chromatic dispersion of the two lenses to reduce chromatic aberration and improve imaging quality. In addition, the cemented lens reduces the number of components between the two lenses, reduces the number of processes, and reduces costs. Furthermore, the cemented lens can reduce field curvature, correct off-axis aberrations of the optical lens, and reasonably distribute focal length to facilitate thermal compensation and achieve good temperature performance.

[0189] In the embodiment, the optical lens further includes a diaphragm arranged between the second lens and the third lens. Arranging the diaphragm between the second lens and the third lens facilitates effective collection of light entering the optical lens, reduces the lens aperture at the rear end of the optical lens, and reduces the assembly sensitivity of the optical lens.

[0190] Optionally, the first side surface of the seventh lens and the second side surface of the seventh lens have inflection points.

[0191] Optionally, the second side surface of the second lens has an inflection point. The inflection point facilitates balancing aberrations and improving resolving power.

[0192] In the embodiment, the second lens and the seventh lens are aspherical lenses. The use of two aspherical lenses facilitates correction of aberrations of the optical lens and improves resolving power.

[0193] In the embodiment, the optical total length TTL of the optical lens and the overall focal length F of the optical lens satisfy TTL / F≤4. Limiting TTL / F to a reasonable range can effectively limit the length of the optical lens and facilitate miniaturization of the optical lens. Preferably, TTL / F≤3.

[0194] In the embodiment, the radius of curvature R2 of the second side surface of the first lens of the optical lens and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: -6≤R2 / D2≤5. Reasonably setting the ratio of the radius of curvature and the aperture of the second side surface of the first lens is conducive to reducing the height of the light entering the second lens, conducive to realizing a small aperture, while taking into account the machinability of the lens, and avoiding that the first lens is difficult to be formed due to too small radius of curvature. Preferably, -5≤R2 / D2≤4.

[0195] In the embodiment, the focal length value F7 of the seventh lens and the total focal length value F of the optical lens satisfy: |F7 / F|≤35. Reasonably allocating the focal length of the seventh lens can make the light enter the optical system smoothly, while being conducive to light collection, ensuring the light quantity, and improving the resolution. Preferably, |F7 / F|≤32.

[0196] In the embodiment, the entrance pupil diameter ENPD of the optical lens and the total focal length value F of the optical lens satisfy: F / ENPD≤2. Setting in this way makes the optical lens have a smaller FNO, which is conducive to increasing the light quantity, and the increase of the entrance pupil diameter helps to improve the relative luminance, which is conducive to clear imaging of the optical lens in a dark environment. Preferably, F / ENPD≤1.8.

[0197] In the embodiment, the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≥0.05. Setting in this way is conducive to realizing a long back focal length of the optical lens, while reserving space for the installation and focusing of the optical elements, and avoiding interference between the optical elements. Preferably, BFL / TTL≥0.1.

[0198] In the embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: -2≤F4 / F5≤-0.3. Setting in this way makes the focal length of the fourth lens and the fifth lens similar, which is helpful for the smooth transition of light and the correction of chromatic aberration. Preferably, -1.8≤F4 / F5≤-0.5.

[0199] In the embodiment, the focal length value F3 of the third lens and the focal length value F6 of the sixth lens satisfy: F3 / F6≤3. Reasonably setting the focal length ratio of the third lens and the sixth lens is conducive to better adjusting chromatic aberration and improving the resolution of the optical lens. Preferably, 1≤F3 / F6≤2.5.

[0200] In the embodiment, the focal length value F3 of the third lens and the focal length value F7 of the seventh lens satisfy: F3 / F7≤0.5. Reasonably setting the focal length ratio of the third lens and the seventh lens is conducive to better adjusting chromatic aberration and improving the resolution. Preferably, F3 / F7≤0.25.

[0201] In the embodiment, a relationship between the curvature radius R13 of the first side surface of the seventh lens and the focal length F7 of the seventh lens satisfies: R13 / F7≤-0.1. Controlling R13 / F7 within a reasonable range can assist in smoothing the light path, especially the light path of the edge field of view, and better correct aberration and improve the imaging quality of the optical lens to achieve high resolving power. Preferably, -15≤R13 / F7≤-0.15.

[0202] In the embodiment, a relationship between the focal length F6 of the sixth lens and the overall focal length F of the optical lens satisfies: F6 / F≤1.5. The focal length of the sixth lens is small, and the secondary reflection between lenses is less likely to occur, reducing the risk of ghost image generation and improving the resolving power of the optical lens. Preferably, F6 / F≤1.2.

[0203] In the embodiment, a relationship between the air gap d12 between the sixth lens and the seventh lens and the overall optical length TTL of the optical lens satisfies: d12 / TTL≥0.1. Such a setting allows a certain spatial interval between the sixth lens and the seventh lens, which is conducive to smooth transition of light and less likely to reflect between lenses and the edges of the lenses, reducing the risk of ghost image generation. Preferably, d12 / TTL>0.12.

[0204] In the embodiment, a relationship between the focal length F3 of the third lens, the focal length F4 of the fourth lens, 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: F3 / R7+F4 / R8≤3. By controlling F3 / R7+F4 / R8 within a reasonable range, the reflected light between the fourth lens and the seventh lens can be effectively avoided from generating ghost images on the second side surface of the third lens, reducing ghost images on the imaging surface, and effectively improving the imaging quality of the optical lens. Preferably, -5≤F3 / R7+F4 / R8≤1.8.

[0205] In the embodiment, a relationship between the curvature radius R6 of the first side surface of the third lens and the curvature radius R7 of the second side surface of the third lens satisfies: R6 / R7≥-0.8. Reasonably setting the curvature radius of the third lens is conducive to smooth transition of light and reduces the tolerance sensitivity of the optical lens. Preferably, -0.7≤R6 / R7<0.

[0206] In the embodiment, a relationship between the curvature radius R11 of the first side surface of the sixth lens and the curvature radius R12 of the second side surface of the sixth lens satisfies: R11 / R12≤22. Reasonably setting the curvature radius of the sixth lens can correct the aberration of the optical lens and reduce the tolerance sensitivity of the optical lens. Preferably, -1.3≤R11 / R12≤20.

[0207] In the embodiment, the radius of curvature R2 of the second side surface of the first lens and the total focal length F of the optical lens satisfy: |R2 / F|≤4. Reasonably controlling the radius of curvature of the second side surface of the first lens and the total focal length F of the optical lens is beneficial to shrink the front end light, so that the height of the light entering the second lens is reduced, the front end aperture is reduced, and the optical lens is miniaturized. Preferably, |R2 / F|≤3.5.

[0208] Optionally, the optical lens can further include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0209] In the optical lens, the maximum field of view FOV of the optical lens is related to H, and the field of view corresponding to the image height is used. The total optical length TTL of the optical lens refers to the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis. The optical back focal length BFL of the optical lens refers to the distance from the center of the second side surface of the last lens of the optical lens to the center of the imaging surface.

[0210] The optical lens in the present application can adopt multiple lenses, for example, seven lenses as described above. In the present application, at least one of the lens surfaces of each lens is a non-spherical lens surface. The characteristic of the aspherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, 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. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the seventh lens can all use aspherical lenses.

[0211] In the exemplary embodiment, the first lens to the seventh lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focal length of the optical lens with temperature change, so as to improve the system stability. At the same time, using glass material can avoid the lens imaging blur caused by the temperature change of high and low temperature in the use environment, which affects the normal use of the lens. For example, the optical lens with all-glass design has a wide temperature range, and can maintain stable optical performance in the range of -40℃ to 105℃.

[0212] Specifically, when focusing on the resolution and reliability, the first lens to the seventh lens can all be glass aspherical lenses. Of course, in the application field with low temperature stability requirement, the first lens to the seventh lens in the optical lens can also be made of plastic. The optical lens made of plastic can effectively reduce the manufacturing cost. Of course, the first lens to the seventh lens in the optical lens can also be made of plastic and glass.

[0213] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0214] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0215] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0216] Example 1

[0217] like Figure 1 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0218] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0219] In the present example, the focal length F of the optical lens is 15.1574 mm, the total length TTL of the optical lens is 30.4424 mm, and the maximum field of view FOV of the optical lens is 34.088°.

[0220] In the present example, the fourth lens and the fifth lens are cemented lenses, the second side surface of the fourth lens and the first side surface of the fifth lens are both S9, but the surface types of the two are different in the case of the same curvature radius, so the second side surface S9 of the fourth lens is a concave surface, and the first side surface S9 of the fifth lens is a convex surface.

[0221] In the present example, the first side surface of the seventh lens and the second side surface of the seventh lens are arranged to be reverse curved.

[0222] Table 1 shows the basic structure parameter table of the optical lens of Example 1, wherein the units of the curvature radius Radius and the thickness Thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0223]

[0224]

[0225] Table 1

[0226] In the present example, the second lens and the seventh lens are aspherical lenses. The surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0227]

[0228] wherein x is the distance sagittal height of the aspherical surface at a height of h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above); k is the conic coefficient; and A is the high-order term coefficient. Table 2 below shows the conic coefficient k and the high-order term coefficients A (4th order term coefficient), B (6th order term coefficient), C (8th order term coefficient), D (10th order term coefficient), E (12th order term coefficient), F (14th order term coefficient), and G (16th order term coefficient) that can be used for the surface of the aspherical lens in the present example.

[0229] Surf K A B C D E F G 3 26.0390 1.5713E-04 2.9150E-06 -2.6888E-07 1.7988E-08 -6.4330E-10 1.1734E-11 -8.5802E-14 4 97.9750 1.3915E-04 1.4870E-06 -1.3905E-07 9.7760E-09 -3.9328E-10 8.2924E-12 -8.8366E-14 13 -99.0000 -1.9532E-03 -7.5055E-05 7.0040E-06 -7.2906E-07 2.8734E-08 4.0162E-10 -4.7459E-11 14 6.1421 -1.5505E-03 -8.3902E-05 7.1487E-06 -5.4423E-07 2.4044E-08 -4.9359E-10 1.0962E-12

[0230] Table 2

[0231] Example Two

[0232] As Figure 2As 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0233] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0234] In this example, the focal length F of the optical lens is 15.129mm, the total length TTL of the optical lens is 30.3078mm, and the maximum field of view FOV of the optical lens is 34.5532°.

[0235] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0236] In this example, the first side and the second side of the seventh lens are set to be inverted.

[0237] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0238] Surf Radius Thickness Nd Vd 1 -11.5500 2.5000 1.63 35.70 2 -19.4430 0.2000 3 100.0000 4.4000 1.68 31.20 4 60.7200 0.4000 STO Infinity 0.1000 6 15.0000 3.3100 1.44 95.10 7 -101.0000 0.1000 8 8.9000 3.7000 1.69 53.38 9 46.0000 0.9000 1.69 31.16 10 8.2800 1.5000 11 10.4000 3.3900 1.69 53.38 12 70.0000 3.9000 13 199.0000 2.0000 1.68 31.20 14 13.8629 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.8900 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.0878 IMA / /

[0239] Table 3

[0240] In this example, the second and seventh lenses are aspherical lenses. Table 4 shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surfaces in this example.

[0241] Surf K A B C D E F G 3 26.0390 1.5891E-04 3.0339E-06 -2.6936E-07 1.7988E-08 -6.4330E-10 1.1734E-11 -8.5802E-14 4 97.9750 1.3757E-04 1.4479E-06 -1.3734E-07 9.7760E-09 -3.9328E-10 8.2924E-12 -8.8366E-14 13 -99.0000 -1.8922E-03 -7.4148E-05 7.0040E-06 -7.2906E-07 2.8697E-08 4.0162E-10 -4.7459E-11 14 6.1421 -1.5507E-03 -8.5706E-05 7.2759E-06 -5.4423E-07 2.4044E-08 -4.8969E-10 1.1174E-12

[0242] Table 4

[0243] Example 3

[0244] like Figure 3 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0245] 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 positive optical power, with its first side surface S3 being convex 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 concave. The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has negative optical power, with its first side surface S13 being convex and its second side surface S14 being concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0246] In this example, the focal length F of the optical lens is 15.2709mm, the total length TTL of the optical lens is 31.4813mm, and the maximum field of view FOV of the optical lens is 34.5862°.

[0247] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0248] In this example, the second side surface of the second lens, the first side surface of the seventh lens, and the second side surface of the seventh lens are set to be inverted.

[0249] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0250]

[0251]

[0252] Table 5

[0253] In this example, the second and seventh lenses are aspherical lenses. Table 6 shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0254] Surf K A B C D E F G 3 4.4000 4.4958E-05 3.4720E-06 -2.6487E-07 1.9867E-08 -6.3993E-10 1.1642E-11 -8.4682E-14 4 8.8000 1.3197E-04 2.7371E-06 -1.2362E-07 1.0674E-08 -3.9553E-10 7.4857E-12 -5.5913E-14 13 92.0000 -1.8580E-03 -4.9759E-05 5.8155E-06 -5.5485E-07 2.6308E-08 -2.6423E-10 -9.0175E-12 14 6.5500 -1.7344E-03 -7.4135E-05 8.4462E-06 -6.5065E-07 2.4456E-08 -2.8885E-10 -4.3926E-12

[0255] Table 6

[0256] Example 4

[0257] 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0258] The first lens L1 has negative focal 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 positive focal power, the first side S3 of the second lens is convex, and the second side S4 of the second lens is convex. The third lens L3 has positive focal 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 focal 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 negative focal power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The sixth lens L6 has positive focal power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave. The seventh lens L7 has negative focal power, the first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is concave. The filter has a first side S15 of the filter and a second side S16 of the filter, and the protection glass has a first side S17 of the protection glass and a second side S18 of the protection glass. Light from an object sequentially passes through the surfaces S1 to S18 and is finally imaged on an image plane IMA.

[0259] In this example, the focal length F of the optical lens is 15.2607 mm, the total track length TTL of the optical lens is 29.9913 mm, and the maximum field of view FOV of the optical lens is 34.664°.

[0260] In this example, the fourth lens and the fifth lens are cemented lenses, the second side of the fourth lens and the first side of the fifth lens are both S9, but the surface types of the second side of the fourth lens and the first side of the fifth lens are different in the case of the same radius of curvature, so the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0261] In this example, the second side of the second lens, the first side of the seventh lens, and the second side of the seventh lens are configured to be reverse curved.

[0262] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0263] Surf Radius Thickness Nd Vd 1 -14.4700 1.4600 1.63 35.70 2 31.2600 0.2400 3 22.3700 4.2000 1.68 31.20 4 -50.0000 1.0000 STO Infinity 0.1000 6 15.0000 3.4000 1.44 95.10 7 -115.8000 0.1000 8 8.9000 3.7000 1.69 53.38 9 150.0000 0.9000 1.69 31.16 10 6.7200 1.6300 11 9.1700 3.4400 1.69 53.38 12 40.8000 3.9000 13 47.1600 2.0000 1.68 31.20 14 13.6700 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.8900 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1013 IMA / /

[0264] Table 7

[0265] In this example, the second lens and the seventh lens are aspheric lenses. Table 8 shows the conic coefficient k and the high-order term coefficients of the aspheric lens surface that can be used in this example.

[0266] Surf K A B C D E F G 3 4.4000 4.5292E-05 3.4953E-06 -2.6487E-07 1.8064E-08 -6.3212E-10 1.1732E-11 -8.3666E-14 4 8.8000 1.3197E-04 2.7371E-06 -1.2346E-07 1.0713E-08 -3.9553E-10 7.5519E-12 -5.5361E-14 13 92.0000 -1.8580E-03 -4.9759E-05 5.8155E-06 -5.5485E-07 2.5173E-08 -2.6423E-10 -9.1979E-12 14 6.5500 -1.7344E-03 -7.4235E-05 8.3612E-06 -6.5065E-07 2.4456E-08 -2.8885E-10 -4.3926E-12

[0267] Table 8

[0268] Example 5

[0269] like Figure 5 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0270] 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 positive 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 concave. The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S13 being convex and its second side surface S14 being concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0271] In this example, the focal length F of the optical lens is 15.1181mm, the total length TTL of the optical lens is 30.952mm, and the maximum field of view FOV of the optical lens is 34.5322°.

[0272] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0273] In this example, the first side and the second side of the seventh lens are set to be inverted.

[0274] Table 9 shows the basic structure parameter table of the optical lens of Example Five, wherein the units of the radius of curvature Radius and the thickness / distance are millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0275]

[0276]

[0277] Table 9

[0278] In the present example, the second lens and the seventh lens are aspherical lenses. Table 10 shows the conic constant k and the coefficients of the higher order terms of the aspherical lens surface that can be used in the present example.

[0279] Surf K A B C D E F G 3 4.7000 1.2368E-04 3.6778E-06 -2.9824E-07 1.6757E-08 -6.3560E-10 1.2915E-11 -1.2891E-13 4 -100.0000 3.7914E-04 6.2363E-06 -5.2680E-08 1.1355E-08 -4.0035E-10 7.4857E-12 9.3522E-15 13 41.2400 -1.9349E-03 -1.8842E-05 7.0240E-07 -3.3839E-07 2.6991E-08 -7.9261E-10 -7.6518E-13 14 3.9000 -1.8643E-03 -1.0330E-04 9.0019E-06 -6.7459E-07 2.4707E-08 -2.9804E-10 -4.2038E-12

[0280] Table 10

[0281] Example Six

[0282] As shown in Table 11, 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA. Figure 6 The first lens L1 has a negative focal power, the first side surface S1 of the first lens is a concave surface, and the second side surface S2 of the first lens is a concave surface. The second lens L2 has a positive focal power, the first side surface S3 of the second lens is a convex surface, and the second side surface S4 of the second lens is a concave surface. The third lens L3 has a positive focal power, the first side surface S6 of the third lens is a convex surface, and the second side surface S7 of the third lens is a convex surface. The fourth lens L4 has a positive focal power, the first side surface S8 of the fourth lens is a convex surface, and the second side surface S9 of the fourth lens is a concave surface. The fifth lens L5 has a negative focal power, the first side surface S9 of the fifth lens is a convex surface, and the second side surface S10 of the fifth lens is a concave surface. The sixth lens L6 has a positive focal power, the first side surface S11 of the sixth lens is a concave surface, and the second side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a negative focal power, the first side surface S13 of the seventh lens is a convex surface, and the second side surface S14 of the seventh lens is a concave surface. The filter has a first side surface S15 and a second side surface S16 of the filter, and the protective glass has a first side surface S17 and a second side surface S18 of the protective glass. Light from an object passes through the surfaces S1 to S18 in order and is finally imaged on the imaging surface IMA.

[0283]

[0284] ​In the present example, the focal length F of the optical lens is 15.1436 mm, the total length TTL of the optical lens is 30.94 mm, and the maximum field of view FOV of the optical lens is 34.708°.

[0285] In the present example, the fourth lens and the fifth lens are cemented lenses, the second side of the fourth lens and the first side of the fifth lens are both S9, but the surface types of the two are different in the case of the same curvature radius, so the second side S9 of the fourth lens is a concave surface, and the first side S9 of the fifth lens is a convex surface.

[0286] In the present example, the first side of the seventh lens and the second side of the seventh lens are configured to be reverse curved.

[0287] Table 11 shows the basic structure parameter table of the optical lens of Example Six, wherein the units of the curvature radius Radius and the thickness Thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0288] Surf Radius Thickness Nd Vd 1 -23.6600 1.3000 1.63 35.70 2 15.6500 0.4400 3 15.4400 4.1900 1.68 31.20 4 200.0000 0.3900 STO Infinity 0.1000 6 15.0000 3.6100 1.44 95.10 7 -27.6700 0.1000 8 8.9000 3.7000 1.69 53.38 9 245.5200 0.9000 1.69 31.16 10 7.4000 2.8400 11 -200.0000 3.5400 1.69 53.38 12 -11.0000 3.9000 13 28.8300 2.0000 1.68 31.20 14 10.8400 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.9000 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1000 IMA / /

[0289] Table 11

[0290] In the present example, the second lens and the seventh lens are aspherical lenses. Table 12 shows the conic coefficient k and the high-order term coefficients of the aspherical lens surface that can be used in the present example.

[0291] Surf K A B C D E F G 3 4.7000 1.2293E-04 3.7142E-06 -2.9824E-07 1.6778E-08 -6.3560E-10 1.2944E-11 -1.2866E-13 4 -100.0000 3.7914E-04 6.2314E-06 -5.2264E-08 1.1355E-08 -3.9206E-10 7.6354E-12 9.0535E-15 13 41.2000 -1.9217E-03 -1.8842E-05 6.9383E-07 -3.3839E-07 2.6991E-08 -7.9261E-10 -7.6518E-13 14 3.8000 -1.8643E-03 -1.0536E-04 9.0019E-06 -6.6927E-07 2.4707E-08 -2.9804E-10 -4.2038E-12

[0292] Table 12

[0293] Example Seven

[0294] As shown in Figure 7 , the optical lens sequentially includes, 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0295] The first lens L1 has negative focal power, the first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has positive focal power, the first side S3 of the second lens is convex, and the second side S4 of the second lens is convex. The third lens L3 has positive focal 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 focal 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 negative focal power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The sixth lens L6 has positive focal power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave. The seventh lens L7 has positive focal power, the first side S13 of the seventh lens is concave, and the second side S14 of the seventh lens is convex. The filter has a first side S15 of the filter and a second side S16 of the filter, and the protection glass has a first side S17 of the protection glass and a second side S18 of the protection glass. Light from an object sequentially passes through the surfaces S1 to S18 and is finally imaged on an imaging plane IMA.

[0296] In this example, the focal length F of the optical lens is 14.7268 mm, the total length TTL of the optical lens is 30.962 mm, and the maximum field of view FOV of the optical lens is 34.1154°.

[0297] In this example, the fourth lens and the fifth lens are cemented lenses, the second side of the fourth lens and the first side of the fifth lens are both S9, but the surface types of the second side of the fourth lens and the first side of the fifth lens are different in the case of the same radius of curvature, so the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0298] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0299] Surf Radius Thickness Nd Vd 1 400.0000 1.3000 1.63 35.70 2 11.5800 1.7500 3 30.0400 4.5000 1.68 31.20 4 -45.9000 0.1000 STO Infinity 0.1000 6 15.0000 3.2600 1.44 95.10 7 -350.3100 0.1000 8 8.1200 3.7000 1.69 53.38 9 150.0000 0.9000 1.69 31.16 10 5.6000 2.0220 11 10.0000 3.3100 1.69 53.38 12 60.0000 4.0000 13 -150.0000 2.0000 1.68 31.20 14 -100.0000 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.8900 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1000 IMA / /

[0300] Table 13

[0301] In this example, the second lens and the seventh lens are aspherical lenses. Table 14 shows the conic coefficients k and the high-order term coefficients of the aspherical lens surfaces that can be used in this example.

[0302]

[0303]

[0304] Table 14

[0305] Example 8

[0306] like Figure 8 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0307] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is convex, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0308] In this example, the focal length F of the optical lens is 14.7435mm, the total length TTL of the optical lens is 30.962mm, and the maximum field of view FOV of the optical lens is 34.057°.

[0309] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0310] Table 15 shows the basic structural parameters of the optical lens in Example 8, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0311]

[0312]

[0313] Table 15

[0314] In this example, the second and seventh lenses are aspherical lenses. Table 16 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example.

[0315] Surf K A B C D E F G 3 -23.0000 -5.9740E-05 6.5768E-07 -3.0341E-07 1.6891E-08 -5.8648E-10 1.1655E-11 -1.0897E-13 4 58.0000 -9.0931E-05 2.2335E-06 -2.1678E-07 1.3005E-08 -3.4176E-10 2.9253E-12 4.5004E-14 13 28.7200 -1.2344E-03 1.2368E-04 -3.1245E-05 3.4670E-06 -1.9870E-07 5.8698E-09 -7.1184E-11 14 -31.0500 4.8519E-04 -2.5360E-04 3.2240E-05 -2.7184E-06 1.4449E-07 -4.2068E-09 5.0378E-11

[0316] Table 16

[0317] Example 9

[0318] like Figure 9 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0319] 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 positive 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 concave. The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has negative optical power, with its first side surface S13 being convex and its second side surface S14 being concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0320] In this example, the focal length F of the optical lens is 15.3277mm, the total length TTL of the optical lens is 30.91mm, and the maximum field of view FOV of the optical lens is 34.3811°.

[0321] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0322] In this example, the first side and the second side of the seventh lens are set to be inverted.

[0323] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0324] Surf Radius Thickness Nd Vd 1 -18.5800 1.3800 1.63 35.70 2 40.0000 1.2900 3 20.2700 3.2000 1.68 31.20 4 233.8000 0.3100 STO Infinity 1.1700 6 15.3000 4.9200 1.44 95.10 7 -37.3000 0.1000 8 9.9000 3.6800 1.69 53.38 9 78.6100 0.7700 1.69 31.16 10 6.9200 1.6500 11 8.5800 3.5300 1.69 53.38 12 45.3300 3.8700 13 234.0500 1.0900 1.68 31.20 14 12.2200 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.9000 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1200 IMA / /

[0325] Table 17

[0326] In this example, the second and seventh lenses are aspherical lenses. Table 18 shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0327] Surf K A B C D E F G 3 1.0300 -5.2126E-05 2.0239E-06 -2.6236E-07 1.8029E-08 -6.4381E-10 1.1753E-11 -8.6697E-14 4 200.0000 3.4583E-05 8.8520E-07 -1.2276E-07 9.8451E-09 -3.9927E-10 8.3477E-12 -7.5303E-14 13 123.0000 -3.7391E-03 4.4140E-05 9.6091E-06 -8.8206E-07 2.4832E-08 6.5405E-10 -3.3472E-11 14 -8.6300 -3.1383E-03 8.9607E-05 4.4185E-06 -6.2007E-07 2.6220E-08 -3.6559E-10 -9.9284E-13

[0328] Table 18

[0329] Example 10

[0330] like Figure 10 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0331] The first lens L1 has negative focal 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 positive focal 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 focal 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 focal 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 negative focal power, the first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The sixth lens L6 has positive focal power, the first side S11 of the sixth lens is convex, and the second side S12 of the sixth lens is concave. The seventh lens L7 has negative focal power, the first side S13 of the seventh lens is convex, and the second side S14 of the seventh lens is concave. The filter has a first side S15 of the filter and a second side S16 of the filter, and the protection glass has a first side S17 of the protection glass and a second side S18 of the protection glass. Light from an object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane IMA.

[0332] In this example, the focal length F of the optical lens is 15.3486 mm, the total track length TTL of the optical lens is 30.9339 mm, and the maximum field of view FOV of the optical lens is 34.3811°.

[0333] In this example, the fourth lens and the fifth lens are cemented lenses, the second side of the fourth lens and the first side of the fifth lens are both S9, but the surface types of the second side of the fourth lens and the first side of the fifth lens are different in the case of the same radius of curvature, so the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0334] In this example, the first side of the seventh lens and the second side of the seventh lens are arranged to be reverse curved.

[0335] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0336] Surf Radius Thickness Nd Vd 1 -18.6000 1.4000 1.63 35.70 2 40.1000 1.2700 3 20.3000 3.2200 1.68 31.20 4 233.8000 0.3100 STO Infinity 1.1739 6 15.3000 4.9200 1.44 95.10 7 -37.3000 0.1000 8 9.9000 3.6900 1.69 53.38 9 78.6100 0.7700 1.69 31.16 10 6.9200 1.6500 11 8.5900 3.5300 1.69 53.38 12 45.3300 3.8700 13 234.0000 1.0900 1.68 31.20 14 12.2200 0.9300 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.9000 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1100 IMA / /

[0337] Table 19

[0338] In this example, the second lens and the seventh lens are aspheric lenses. Table 20 shows the conic coefficient k and the high-order term coefficients of the aspheric lens surface that can be used in this example.

[0339] Surf K A B C D E F G 3 1.0300 -4.8899E-05 1.9814E-06 -2.6863E-07 1.8029E-08 -6.5669E-10 1.1753E-11 -8.6697E-14 4 200.2000 3.5274E-05 8.8697E-07 -1.2276E-07 9.8487E-09 -3.9927E-10 8.3294E-12 -7.3739E-14 13 123.4000 -3.7558E-03 4.4140E-05 9.6091E-06 -8.8206E-07 2.4832E-08 6.5405E-10 -3.3472E-11 14 -8.6000 -3.1383E-03 9.0703E-05 4.4416E-06 -5.9623E-07 2.6220E-08 -3.6694E-10 -9.9284E-13

[0340] Table 20

[0341] Example 11

[0342] like Figure 11 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0343] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave 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 negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S13 being convex and its second side surface S14 being concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0344] In this example, the focal length F of the optical lens is 14.9032mm, the total length TTL of the optical lens is 29.97mm, and the maximum field of view FOV of the optical lens is 33.9166°.

[0345] In this example, the fourth and fifth lenses are cemented lenses. The second side of the fourth lens and the first side of the fifth lens are both S9. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side S9 of the fourth lens is concave, and the first side S9 of the fifth lens is convex.

[0346] Table 21 shows the basic structural parameters of the optical lens in Example 11, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0347]

[0348]

[0349] Table 21

[0350] In this example, the second and seventh lenses are aspherical lenses. Table 22 shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0351] Surf K A B C D E F G 3 97.6000 -8.6954E-04 1.1461E-05 -2.6592E-07 1.3070E-08 -5.7551E-10 1.3585E-11 -1.2072E-13 4 -4.9700 -2.7249E-04 4.1411E-06 2.4539E-07 -1.2886E-08 -2.1264E-10 3.0923E-11 -6.373E-13 13 0.5000 -1.1133E-03 -4.5865E-05 5.8099E-06 -4.3713E-07 1.7375E-08 -3.4258E-10 2.4865E-12 14 -0.2800 -1.4690E-03 -1.1260E-04 1.4529E-05 -9.8473E-07 2.0687E-08 6.0237E-10 -2.5832E-11

[0352] Table 22

[0353] Example 12

[0354] 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 sixth lens L6, a seventh lens L7, a filter, a protective glass, and an imaging surface IMA.

[0355] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave 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 negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S13 being convex and its second side surface S14 being concave. The filter has a first side surface S15 and a second side surface S16, and the protective glass has a first side surface S17 and a second side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0356] In this example, the focal length F of the optical lens is 14.9016mm, the total length TTL of the optical lens is 29.95mm, and the maximum field of view FOV of the optical lens is 33.868°.

[0357] In the present example, the fourth lens and the fifth lens are cemented lenses, the second side surface of the fourth lens and the first side surface of the fifth lens are both S9, but the surface types of the two are different in the case of the same curvature radius, so the second side surface S9 of the fourth lens is a concave surface, and the first side surface S9 of the fifth lens is a convex surface.

[0358] Table 23 shows the basic structure parameter table of the optical lens of example twelve, wherein the units of the curvature radius Radius and the thickness Thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity indicates infinity.

[0359] Surf Radius Thickness Nd Vd 1 22.5000 3.0000 1.63 35.70 2 -45.0000 0.5000 3 -96.0800 3.0000 1.68 31.20 4 9.7000 0.7400 STO Infinity 0.1000 6 56.9500 4.0000 1.44 95.10 7 -9.4300 0.1000 8 60.0000 2.4200 1.69 53.38 9 40.0000 1.0000 1.69 31.16 10 50.0000 0.1000 11 22.6000 4.0000 1.69 53.38 12 -19.7000 4.0000 13 7.9700 2.0000 1.68 31.20 14 4.5000 2.0000 15 Infinity 0.5000 1.52 64.20 16 Infinity 1.8900 17 Infinity 0.5000 1.52 64.20 18 Infinity 0.1000 IMA / /

[0360] Table 23

[0361] In the present example, the second lens and the seventh lens are aspherical lenses. Table 24 shows the conic coefficient k and each high-order term coefficient of the aspherical lens surface that can be used in the present example.

[0362] Surf K A B C D E F G 3 97.6000 -8.7015E-04 1.1461E-05 -2.6513E-07 1.3070E-08 -5.7551E-10 1.3585E-11 -1.2072E-13 4 -4.9700 -2.7249E-04 4.1415E-06 2.4539E-07 -1.2886E-08 -2.1264E-10 3.0923E-11 -6.373E-13 13 0.5000 -1.1133E-03 -4.5865E-05 5.8099E-06 -4.3713E-07 1.7375E-08 -3.4258E-10 2.4865E-12 14 -0.2700 -1.4690E-03 -1.1260E-04 1.4529E-05 -9.8473E-07 2.0687E-08 6.0237E-10 -2.5832E-11

[0363] Table 24

[0364] In summary, examples one to twelve satisfy the relationship shown in Table 25.

[0365]

[0366]

[0367] Table 25 Table 26 gives the total focal length value F (unit: millimeter) of the optical lens of examples one to twelve.

[0368] Parameter / Example 1 2 3 4 5 6 7 8 9 10 11 12 F 15.1574 15.1290 15.2709 15.2607 15.1181 15.1436 14.7268 14.7435 15.3277 15.3486 14.9032 14.9016 TTL 30.4424 30.3078 31.4813 29.9913 30.9520 30.9400 30.9620 30.9620 30.9100 30.9339 29.9700 29.9500 BFL 3.9200 3.9078 3.9313 3.9213 3.9300 3.9300 3.9200 3.9300 3.9500 3.9400 5.0000 4.9900 ENPD 9.2142 9.1970 9.2832 9.2770 9.1903 9.2059 8.9525 8.9626 9.3178 9.3304 9.0597 9.0587 F1 -51.4729 -51.4586 -15.5159 -15.5085 -14.7647 -14.7622 -18.9526 -18.9556 -19.9554 -19.9836 24.2246 24.2246 F2 -233.4956 -235.6090 23.0258 23.0258 24.1145 24.1150 27.0646 27.0410 32.0880 32.1387 -12.6684 -12.6695 F3 30.0729 30.0729 30.5541 30.5544 22.7884 22.7901 32.9225 32.9217 25.4916 25.4916 18.8144 18.8124 F4 15.1920 15.2182 13.4376 13.4376 13.1724 13.1724 12.1933 12.1933 15.9098 15.9089 -177.8589 -181.2720 F5 -14.6811 -14.6902 -10.1611 -10.1611 -11.0134 -11.0088 -8.4017 -8.4017 -10.9796 -10.9796 270.2050 276.7803 F6 17.1734 17.1348 16.2754 16.2546 16.5826 16.5826 16.7708 16.7661 14.6162 14.6371 15.7200 15.7200 F7 -21.7573 -21.7709 -28.6992 -28.6992 -26.4678 -26.4678 429.3854 429.3785 -18.7921 -18.7924 -19.6480 -19.6480 d12 3.9000 3.9000 3.9000 3.9000 3.9000 3.9000 4.0000 4.0000 3.8700 3.8700 4.0000 4.0000 D2 12.0696 12.0151 11.8637 11.8477 11.0420 11.0581 10.8592 10.8592 11.0967 11.0831 10.1186 10.1128 R2 -19.4400 -19.4430 31.2600 31.2600 15.6500 15.6500 11.5800 11.5860 40.0000 40.1000 -45.0000 -45.0000 R6 15 15 15 15 15 15 15 15 15.3 15.3 -9.43 -9.43 R7 -101 -101 -115.84 -115.8 -27.67 -27.67 -350.31 -350 -37.3 -37.3 60.1 60 R8 8.9000 8.9000 8.9000 8.9000 8.9000 8.9000 8.1200 8.1200 9.9000 9.9000 39.8000 40.0000 R9 46.4200 46.0000 150.0000 150.0000 245.5200 245.5200 150.0000 150.0000 78.6100 78.6100 50.0000 50.0000 R11 10.4200 10.4000 9.1800 9.1700 -200.0000 -200.0000 10.0000 10.0000 8.5800 8.5900 22.6000 22.6000 R12 70.0000 70.0000 40.8200 40.8000 -11.0000 -11.0000 60.0000 60.1000 45.3300 45.3300 -19.7000 -19.7000 R13 200.0000 199.0000 47.1600 47.1600 28.8300 28.8300 -150.0000 -150.0000 234.0500 234.0000 7.9700 7.9700

[0369] Table 26

[0370] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0371] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application is limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Also, unless otherwise indicated herein, the materials described herein can be used in a variety of applications.

[0372] It should be noted that the terms "first", "second", and the like, as used in the description and the claims herein are intended to modify a particular disclosed embodiment unless otherwise indicated, but do not imply that the architecture having such designation must be the first or second among its field or order of importance. It is also to be understood that the use of the terms "first", "second", etc., was merely used to parameterize similar objects to distinguish one from another without necessarily causing or implying any actual such limitation in the application.

[0373] The preferred embodiments of the application are described herein with reference to the accompanying drawings, in which the same or similar elements in the drawings are referred to with the same or similar reference numerals. The application is not limited to the preferred embodiments described herein, but can be practiced with modification and alteration within the scope of the present application. Accordingly, the specification and drawings are to be regarded as illustrative in nature and explanations in the specification express more by way of non-limiting example.

Claims

1. An optical lens characterized in that, The optical lens is composed of seven lenses with optical power, sequentially comprising from the first side to the second side: a first lens having optical power; a second lens having optical power; a third lens having optical power, the first side of the third lens and the second side of the third lens are both convex; a fourth lens having optical power, the first side of the fourth lens is convex, and the second side of the fourth lens is concave; a fifth lens having optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave; a sixth lens having optical power, at least one of the first side of the sixth lens and the second side of the sixth lens is convex; a seventh lens having optical power, the face type of the first side of the seventh lens and the second side of the seventh lens is opposite; wherein the optical power of the first lens to the seventh lens is negative, negative, positive, positive, negative, positive, negative respectively; or the optical power of the first lens to the seventh lens is negative, positive, positive, positive, negative, positive, negative respectively; or the optical power of the first lens to the seventh lens is negative, positive, positive, positive, negative, positive, positive respectively; or the optical power of the first lens to the seventh lens is positive, negative, positive, negative, positive, positive, negative respectively; the curvature radius R6 of the first side of the third lens and the curvature radius R7 of the second side of the third lens satisfy: -0.8≤R6 / R7<0; the focal length value F3 of the third lens and the focal length value F6 of the sixth lens satisfy: 1≤F3 / F6≤3; the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: -2≤F4 / F5≤-0.3; the fourth lens and the fifth lens are cemented to form a cemented lens.

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

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

4. The optical lens of claim 1, wherein, The first lens has negative optical power, the first side of the first lens is convex, and the second side of the first lens is concave.

5. The optical lens of claim 1, wherein, The first lens has positive optical power, the first side of the first lens is convex, and the second side of the first lens is convex.

6. The optical lens of claim 1, wherein, The second lens has positive optical power, the first side of the second lens is convex, and the second side of the second lens is concave.

7. The optical lens of claim 1, wherein, The second lens has positive optical power, the first side of the second lens is convex, and the second side of the second lens is convex.

8. The optical lens of claim 1, wherein, The second lens has negative optical power, the first side of the second lens is convex, and the second side of the second lens is concave.

9. The optical lens of claim 1, wherein, The second lens has negative optical power, the first side of the second lens is concave, and the second side of the second lens is concave.

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

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

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

13. The optical lens of claim 1, wherein, The seventh lens has negative refractive power, the first side of the seventh lens is convex, and the second side of the seventh lens is concave.

14. The optical lens of claim 1, wherein, The seventh lens has positive refractive power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

15. 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.

16. The optical lens of claim 1, wherein, The first side of the seventh lens and the second side of the seventh lens have inflection points.

17. The optical lens of claim 16, wherein, The second side of the second lens has an inflection point.

18. The optical lens of claim 1, wherein, The second lens and the seventh lens are aspherical lenses.

19. The optical lens of any of claims 1 to 18, wherein, The total track length TTL of the optical lens and the total focal length F of the optical lens satisfy: TTL / F≤4.

20. The optical lens of any of claims 1 to 18, wherein, The radius of curvature R2 of the second side of the first lens of the optical lens and the maximum light aperture D2 of the second side of the first lens corresponding to the maximum field angle of the optical lens satisfy: -6≤R2 / D2≤5.

21. The optical lens of any of claims 1 to 18, wherein, The focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy: |F7 / F|≤35.

22. The optical lens of any of claims 1 to 18, wherein, The entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy: F / ENPD≤2.

23. The optical lens of any of claims 1 to 18, wherein, The optical back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: 0.05≤BFL / TTL≤0.1668.

24. The optical lens of any of claims 1 to 18, wherein, The focal length F3 of the third lens and the focal length F7 of the seventh lens satisfy: -1.3822≤F3 / F7≤0.

5.

25. The optical lens of any of claims 1 to 18, wherein, The radius of curvature R9 of the first side of the fifth lens and the total focal length F of the optical lens satisfy: 2≤R9 / F≤16.2401.

26. The optical lens of any of claims 1 to 18, wherein, The radius of curvature R13 of the first side of the seventh lens and the focal length F7 of the seventh lens satisfy: -15≤R13 / F7≤-0.

1.

27. The optical lens of any of claims 1 to 18, wherein, The focal length F6 of the sixth lens and the total focal length F of the optical lens satisfy: F6 / F≤1.

5.

28. The optical lens of any of claims 1 to 18, wherein, The air gap d12 between the sixth lens and the seventh lens, the total track length TTL of the optical lens satisfy: 0.1≤d12 / TTL≤0.1336.

29. The optical lens of any of claims 1 to 18, wherein, The focal length F3 of the third lens, the focal length F4 of the fourth lens, 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: -5≤F3 / R7+F4 / R8≤3.

30. The optical lens of any of claims 1 to 18, wherein, The radius of curvature R11 of the first side of the sixth lens and the radius of curvature R12 of the second side of the sixth lens satisfy: -1.3≤R11 / R12≤22.

31. The optical lens of any of claims 1 to 18, wherein, The radius of curvature R2 of the second side of the first lens and the total focal length F of the optical lens satisfy: |R2 / F|≤4.

32. The optical lens of any of claims 1 to 18, wherein, The optical lens satisfies any one of the following conditional expressions: 1.9653≤TTL / F≤3; -5≤R2 / D2≤4; 1.2244≤|F7 / F|≤32; 1.645≤F / ENPD≤1.8; 0.1≤BFL / TTL≤0.1668; -1.8≤F4 / F5≤-0.5; 1≤F3 / F6≤2.5; -1.3822≤F3 / F7≤0.25; 2.5≤R9 / F≤16.2401; -15≤R13 / F7≤-0.15; 0.9536≤F6 / F≤1.2; 0.12≤d12 / TTL≤0.1336; -5≤F3 / R7+F4 / R8≤1.8; -0.7≤R6 / R7<0; -1.3≤R11 / R12≤20; 0.7858≤|R2 / F|≤3.5; 1.2244≤|F7 / F|≤1.8806; -15≤R13 / F7≤-9.1406; 0.6564≤F3 / R7+F4 / R8≤1.8; 0.1486≤R11 / R12≤0.2249; wherein TTL is the total track length of the optical lens; F is the focal length of the optical lens; R2 is the radius of curvature of the second side surface of the first lens; D2 is the maximum diameter of the first lens corresponding to the maximum field angle of the optical lens; F7 is the focal length of the seventh lens; ENPD is the entrance pupil diameter of the optical lens; BFL is the back focal length of the optical lens; F4 is the focal length of the fourth lens; F5 is the focal length of the fifth lens; F3 is the focal length of the third lens; F6 is the focal length of the sixth lens; R9 is the radius of curvature of the first side surface of the fifth lens; R13 is the radius of curvature of the first side surface of the seventh lens; d12 is the air gap between the sixth lens and the seventh lens; R7 is the radius of curvature of the second side surface of the third lens; R8 is the radius of curvature of the first side surface of the fourth lens; R6 is the radius of curvature of the first side surface of the third lens; R11 is the radius of curvature of the first side surface of the sixth lens; R12 is the radius of curvature of the second side surface of the sixth lens; R2 is the radius of curvature of the second side surface of the first lens; F is the focal length of the optical lens.

33. The optical lens of any of claims 1 to 18, wherein, The optical lens satisfies any one of the following conditional expressions:

1. 0.9653 ≤ TTL / F ≤ 2.1024; -4.4498 ≤ R2 / D2 ≤ 3.6181; 1.2244 ≤ |F7 / F| ≤ 29.1567; 0.1249 ≤ BFL / TTL ≤ 0.1668; -1.4513 ≤ F4 / F5 ≤ -0.6549; 1.1967 ≤ F3 / F6 ≤ 1.9636; -1.3822 ≤ F3 / F7 ≤ 0.0767; 3.0405 ≤ R9 / F ≤ 16.2401; -12.4547 ≤ R13 / F7 ≤ -0.3493; 0.9536 ≤ F6 / F ≤ 1.1388; 0.1239 ≤ d12 / TTL ≤ 0.1336; -4.2183 ≤ F3 / R7 + F4 / R8 ≤ 1.4122; -0.5421 ≤ R6 / R7 ≤ -0.0428; -1.1472 ≤ R11 / R12 ≤ 18.1818; 0.7858 ≤ |R2 / F| ≤ 3.0198; wherein TTL is the total track length of the optical lens; F is the focal length of the optical lens; R2 is the radius of curvature of the second side surface of the first lens; D2 is the maximum diameter of the first lens corresponding to the maximum field angle of the optical lens; F7 is the focal length of the seventh lens; ENPD is the entrance pupil diameter of the optical lens; BFL is the back focal length of the optical lens; F4 is the focal length of the fourth lens; F5 is the focal length of the fifth lens; F3 is the focal length of the third lens; F6 is the focal length of the sixth lens; R9 is the radius of curvature of the first side surface of the fifth lens; R13 is the radius of curvature of the first side surface of the seventh lens; d12 is the air gap between the sixth lens and the seventh lens; R7 is the radius of curvature of the second side surface of the third lens; R8 is the radius of curvature of the first side surface of the fourth lens; R6 is the radius of curvature of the first side surface of the third lens; R11 is the radius of curvature of the first side surface of the sixth lens; R12 is the radius of curvature of the second side surface of the sixth lens; R2 is the radius of curvature of the second side surface of the first lens; F is the focal length of the optical lens.

34. An electronic device, comprising: An optical lens according to any one of claims 1 to 33 and an imaging element for converting an optical image formed by the optical lens into an electric signal. An optical lens according to any one of claims 1 to 33 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images