Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens comprises a first lens with focal power; the second lens has focal power; the third lens has positive focal power, and the first side surface of the third lens and the second side surface of the third lens are convex surfaces; the fourth lens has focal 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 focal 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 focal power, and 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; the seventh lens has focal power, and the surface type of the first side face of the seventh lens is opposite to that of the second side face of the seventh lens. The optical lens solves at least one of the problems that an optical lens in the prior art has serious aberration problems such as chromatic aberration and distortion, the image definition is poor due to the influence of ghost images, and the requirements of high resolution and miniaturization cannot be met at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and an electronic device. Background Art

[0002] With the development of science and technology, the application scenarios of optical lenses are gradually increasing, and users' requirements for the optical performance of optical lenses are gradually increasing. The structure of optical lenses is developing in the direction of miniaturization, which leads to the miniaturization of optical lenses. Miniaturized optical lenses have problems such as insufficient resolution, serious aberration problems such as chromatic aberration and distortion, and limited clarity. Car lenses are key components for automatic driving assistance systems to obtain external information. With the rapid development of automatic driving assistance systems, the performance requirements for car optical lenses are also getting higher and higher.

[0003] With the development of automobile intelligence, Advanced Driver Assistance System (ADAS) has become an indispensable part of automobiles, and the on-board lens is the "pioneer" in the entire ADAS system. Through the front-view, rear-view and surround-view cameras, it can obtain all-round information inside and outside the vehicle, help the driver obtain road information, and thus help the driver make correct judgments to avoid the adverse consequences caused by limited vision. In order to meet the market demand for applications such as autonomous driving, in complex and changing road environments, it is necessary not only to pay attention to the close-up targets in front of the vehicle, but also to pay attention to the distant targets. In order to obtain long-distance perception and further improve the driver's judgment of the lens capture picture, the lens is required to have a telephoto lens, clear imaging within a small field of view, and low ghost image effect.

[0004] That is to say, the optical lenses in the prior art have serious aberration problems such as chromatic aberration and distortion, poor picture clarity due to ghost images, and cannot meet at least one of the requirements of high resolution and miniaturization at the same time. Summary of the invention

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

[0006] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an optical lens, which comprises, from the first side to the second side, in sequence: a first lens, the first lens having optical power; a second lens, the second lens having optical power; a third lens, the third lens having positive optical power, and the first side surface of the third lens and the second side surface of the third lens are both convex surfaces; a fourth lens, the fourth lens having optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; a fifth lens, the fifth lens having optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave; a sixth lens, the sixth lens having positive optical power, and at least one of the first side surface of the sixth lens and the second side surface of the sixth lens is convex; and a seventh lens, the seventh lens having optical power, and the surface shapes of the first side surface of the seventh lens and the second side surface of the seventh lens are opposite.

[0007] Furthermore, 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.

[0008] Furthermore, 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.

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

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

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

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

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

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

[0015] Furthermore, the fourth lens has positive refractive power.

[0016] Furthermore, the fourth lens has negative refractive power.

[0017] Furthermore, the fifth lens has negative refractive power.

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

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

[0020] Furthermore, 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] Furthermore, 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] Furthermore, the seventh lens has negative optical power, 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] Furthermore, the seventh lens has positive power, 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] Furthermore, the optical lens also includes a stop, and the stop 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] Furthermore, the second side surface of the second lens has an inflection point.

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

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

[0030] Furthermore, a curvature radius R2 of the second side surface of the first lens of the optical lens and a maximum light clearance diameter 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] Furthermore, the focal length F7 of the seventh lens element and the focal length F of the entire optical lens group satisfy: |F7 / F|≤35.

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

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

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

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

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

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

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

[0039] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: F6 / F≤1.5.

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

[0041] Further, 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 satisfy: F3 / R7+F4 / R8≤3.

[0042] Furthermore, 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] Furthermore, a curvature radius R2 of the second side surface of the first lens satisfies the following relationship with the entire focal length F of the optical lens: |R2 / F|≤4.

[0045] According to another aspect of the present invention, an optical lens is provided, comprising, from the first side to the second side, in sequence: a first lens, the first lens having optical power; a second lens, the second lens having optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having optical power; a fifth lens, the fifth lens having optical power; a sixth lens, the sixth lens having positive optical power; a seventh lens, the seventh lens having optical power; a curvature radius R9 of the first side surface of the fifth lens and the focal length value F of the entire group of the optical lens satisfy the following relationship: R9 / F≥2.

[0046] Furthermore, 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.

[0047] Furthermore, 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.

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

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

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

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

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

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

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

[0055] Furthermore, the fourth lens has positive 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.

[0056] Furthermore, the fourth lens has negative 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.

[0057] Furthermore, the fifth lens has negative 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.

[0058] Furthermore, the fifth lens has positive 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.

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

[0060] Furthermore, 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.

[0061] Furthermore, 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.

[0062] Furthermore, the seventh lens has negative optical power, 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.

[0063] Furthermore, the seventh lens has positive power, 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.

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

[0065] Furthermore, the optical lens also includes a stop, and the stop 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 an inflection point.

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

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

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

[0070] Furthermore, a curvature radius R2 of the second side surface of the first lens of the optical lens and a maximum light clearance diameter 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] Furthermore, the focal length F7 of the seventh lens element and the focal length F of the entire optical lens group satisfy: |F7 / F|≤35.

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

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

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

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

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

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

[0078] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: F6 / F≤1.5.

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

[0080] Further, 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 satisfy: F3 / R7+F4 / R8≤3.

[0081] Furthermore, 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] Furthermore, a curvature radius R2 of the second side surface of the first lens satisfies the following relationship with the entire focal length F of the optical lens: |R2 / F|≤4.

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

[0085] According to the technical solution of the present invention, the optical lens 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 in sequence, wherein the first lens has optical power; the second lens has optical power; the third lens has positive optical power, and 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, and the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; the fifth lens has optical power, and the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave; the sixth lens has positive optical power, and at least one of the first side surface of the sixth lens and the second side surface of the sixth lens is convex; the seventh lens has optical power, and the surface shapes of the first side surface of the seventh lens and the second side surface of the seventh lens are opposite.

[0086] The first lens has negative focal length, the first side of the first lens is concave, and the second side of the first lens is concave. The first lens is set as a negative lens, which is conducive to proper diffusion of light. 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 collect as much light of a large field of view as possible to enter the rear optical system, increasing the light throughput of the optical lens. The first lens is a spherical lens, and a waterproof film can be added to the first lens, which is conducive to reducing processing costs.

[0087] 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. The first lens is set as a negative lens, and the first side surface is concave, so that the first side surface of the first lens has a divergent effect on the light, avoiding excessive concentration of the object side light, and the second side surface of the first lens is convex, which cooperates with the first side surface which is concave, which is conducive to controlling the aperture of the rear lens and facilitating the design of the optical lens in the direction of miniaturization.

[0088] The first lens has negative focal length, 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, so as to collect as much light of a large field of view as possible to enter the rear optical system, which is beneficial to increase the light throughput of the optical lens and improve the illumination, and is also beneficial to control the aperture of the rear lens and realize a small aperture design; setting the first lens to have negative focal length and setting the second side surface to be concave can control the direction of large-angle light at the edge of the lens, which is beneficial to a smooth transition of light and can reduce the sensitivity of the optical lens.

[0089] The first lens has positive focal length, the first side surface of the first lens is convex, and the second side surface of the first lens is convex. Setting the first lens to have positive focal length and a biconvex surface is conducive to collecting more light into the optical lens and improving the overall illumination of the optical lens. The second side surface of the first lens is set to a convex surface, which has a converging effect on the light, is conducive to compressing the rear light and realizing a small-caliber and miniaturized design.

[0090] The second lens has positive focal length, 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 have positive focal length and is a meniscus structure convex to the first side, so that as much light as possible fills the entrance pupil, which is beneficial to the improvement of the illumination of the imaging surface. The light emitted by the second lens is well received by the third lens, and at the same time changes the trend of the light, making the rear optical system smoother.

[0091] The second lens has positive focal length, 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 have positive focal length, which has a converging effect on the light. When used with the first lens with negative focal length, it is beneficial for the light to smoothly enter the rear lens, thereby improving the resolution. At the same time, the first side of the second lens is set to be convex, which changes the trend of the edge light, realizes the reduction of the front diameter of the optical lens, reduces the volume of the optical lens, is beneficial to miniaturization, and is beneficial to cost reduction.

[0092] The second lens has negative optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens is set to have negative optical power, and the first side surface of the second lens is convex, which can further converge the light, reduce the light aperture, and avoid excessive divergence of the object side light. With the second side surface being concave, the light trend transitions smoothly, which is conducive to controlling the aperture of the rear lens and achieving miniaturization.

[0093] 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. The second lens is set to have negative optical power and a double concave structure, which has a divergent effect on light, can disperse the central light and edge light of each field of view, expand the aperture, increase the illumination of the optical lens, and at the same time is conducive to the aberration correction of the edge light and the central light to achieve high resolution.

[0094] The third lens has positive focal length, and the first side surface of the third lens and the second side surface of the third lens are both convex surfaces. The third lens is set to have positive focal length, which converges the light. On the one hand, it allows the light emitted by the second lens to smoothly enter the rear optical system, and on the other hand, it lowers the angle of entering the rear optical system, reduces the diameter of the rear port of the optical lens, and achieves miniaturization. The third lens is set to a double convex structure, so that the light emitted by the second lens smoothly transitions to the rear, thereby reducing sensitivity, which is conducive to reducing aberrations and improving resolution. At the same time, the light emitted by the second lens is well received by the third lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0095] The fourth lens has positive focal power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The fourth lens has positive focal power, the first side surface is convex to receive the second side surface of the third lens which is also convex, the light has roughly the same trend on the second side surface of the third lens and the first side surface of the fourth lens, the light has no large deflection, effectively reducing the loss of light energy caused by reflection between lenses, and improving the illumination of the image surface. Controlling the image side surface of the fourth lens to be concave is conducive to the optical lens having a longer back focus.

[0096] The fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The 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 convex. The fourth lens with negative optical power is conducive to collecting the light incident through the third lens and appropriately diverging it, so that the light trend transitions smoothly.

[0097] 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. The fifth lens is set to have negative optical power, and the fifth lens has a divergent effect on the light. At the same time, the fifth lens is set to be a meniscus concave toward the image side, which is conducive to collecting the light emitted by the fourth lens and making the light trend transition smoothly. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, image quality can be improved, and optical performance such as distortion and CRA can be optimized.

[0098] The fifth lens has positive focal length, the first side of the fifth lens is convex, and the second side of the fifth lens is concave. Setting the fifth lens to have positive focal length, and the fifth lens being a positive lens in a cemented lens, in combination with the fourth lens having negative focal length is beneficial to correcting the chromatic aberration of the optical lens, and the convex-concave structure can reduce the degree of deflection of the light emitted from the front lens, which is beneficial to the smooth passage of light, reduces the light energy loss at the interface, improves the relative illumination, and reduces the sensitivity of the optical lens.

[0099] The sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have positive focal length and setting the image side surface to be concave is conducive to light convergence, reducing the aperture and total length of the optical lens, and is conducive to miniaturization of the optical lens. At the same time, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is conducive to reducing the risk of ghost images.

[0100] The sixth lens has positive focal length, the first side of the sixth lens is convex, and the second side of the sixth lens is convex. The sixth lens is set to have positive focal length and is biconvex, so that the sixth lens can further converge light, effectively reducing the aperture and total length of the rear optical system, and can effectively correct the chromatic aberration of the optical lens when combined with the seventh lens. The second side of the fifth lens and the first side of the sixth lens have obvious shape differences, and the sixth lens has obvious changes in the direction of light. When the aperture of the sixth lens is the same, the front port aperture of the optical lens can be reduced, achieving the purpose of miniaturization of the optical lens.

[0101] The sixth lens has positive 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 set to have positive power, and the incident light of the front lens can be converged to the seventh lens, which is beneficial to control the size of CRA, and the surface shape of the first side surface of the sixth lens is relatively flat, which is beneficial to reduce the sensitivity of the optical lens and improve the overall resolution.

[0102] The seventh lens has negative 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 the radius of curvature is large, and the surface shape is relatively flat. When the light passes through the second side surface of the seventh lens, it has little effect on the light trend, which is conducive to achieving a small CRA while ensuring the luminous flux. The seventh lens has negative power, and the second side surface is concave. After the light passes through the second side surface of the sixth lens, the light tends to converge upward, which can make the light quickly accumulate at the height of the imaging surface, which is conducive to expanding the imaging range.

[0103] The seventh lens has positive focal 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 focal power, and the shape of the seventh lens is gentle. The seventh lens is an aspherical lens. The aspherical lens has the characteristics of different curvature radii, which can balance the aberration caused by the front lens and improve the resolution of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0105] Figure 1A schematic diagram of the structure of an optical lens according to Example 1 of the present invention is shown;

[0106] Figure 2 A schematic diagram of the optical lens structure of Example 2 of the present invention is shown;

[0107] Figure 3 A schematic diagram of the structure of an optical lens according to Example 3 of the present invention is shown;

[0108] Figure 4 A schematic diagram of the structure of an optical lens according to Example 4 of the present invention is shown;

[0109] Figure 5 A schematic diagram of the structure of an optical lens according to Example 5 of the present invention is shown;

[0110] Figure 6 A schematic diagram of the structure of an optical lens according to Example 6 of the present invention is shown;

[0111] Figure 7 A schematic diagram of the optical lens structure of Example 7 of the present invention is shown;

[0112] Figure 8 A schematic diagram of the structure of an optical lens according to Example 8 of the present invention is shown;

[0113] Fig. 9 A schematic diagram of the structure of an optical lens according to Example 9 of the present invention is shown;

[0114] Fig.10 A schematic diagram of the structure of an optical lens according to Example 10 of the present invention is shown;

[0115] Fig.11 A schematic diagram of the structure of an optical lens according to Example 11 of the present invention is shown;

[0116] Fig.12 A schematic diagram of the optical lens structure of Example 12 of the present invention is shown. DETAILED DESCRIPTION

[0117] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0118] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0119] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0120] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0121] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0122] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the first side of the lens, and the surface of each lens close to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0123] This application generally protects an ordinary optical lens. In the accompanying drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side and the second side is the image side.

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

[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 in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0126] In order to solve at least one of the problems in the prior art that optical lenses have serious aberration problems such as chromatic aberration and distortion, poor picture clarity due to ghost images, and cannot simultaneously meet the requirements of high resolution and miniaturization, the present invention provides an optical lens and an electronic device.

[0127] Embodiment 1

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

[0129] Optionally, the first lens has a negative optical power, the first side of the first lens is a concave surface, and the second side of the first lens is a concave surface. The first lens is set as a negative lens, which is conducive to proper diffusion of light. At the same time, the first lens is set to 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 collect as much light as possible from a large field of view to enter the rear optical system, increasing the light throughput of the optical lens. The first lens is a spherical lens, and a waterproof film can be added to the first lens, which is conducive to reducing processing costs.

[0130] Optionally, the first lens has a 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 divergent effect on the light, avoiding excessive concentration of the object-side light, and the second side surface of the first lens is a convex surface, which cooperates with the first side surface which is a concave surface, which is conducive to controlling the aperture of the rear lens and facilitating the design of the optical lens in the direction of miniaturization.

[0131] Optionally, the first lens has a negative optical focal length, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface. The first side surface of the first lens is a convex surface, so as to collect as much light of a large field of view as possible to enter the rear optical system, which is beneficial to increase the light throughput of the optical lens and improve the illumination, and is also beneficial to control the aperture of the rear lens and realize a small aperture design; setting the first lens to have a negative optical focal length and setting the second side surface to a concave surface can control the direction of the large-angle light at the edge of the lens, which is beneficial to a smooth transition of light and can reduce the sensitivity of the optical lens.

[0132] Optionally, the first lens has positive focal length, the first side surface of the first lens is convex, and the second side surface of the first lens is convex. Setting the first lens to have positive focal length and a biconvex surface is conducive to collecting more light into the optical lens, improving the overall illumination of the optical lens, and the second side surface of the first lens is set to a convex surface, which has a converging effect on the light, is conducive to compressing the rear light, and realizing a small-caliber and miniaturized design.

[0133] Optionally, the second lens has positive focal length, 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 length and is a meniscus structure convex to the first side surface, so that as much light as possible fills the entrance pupil, which is beneficial to the improvement of the illumination of the imaging surface. The light emitted by the second lens is well received by the third lens, and at the same time, the trend of the light is changed, making the rear optical system smoother.

[0134] Optionally, the second lens has positive focal length, 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 have positive focal length, which has a converging effect on light, and is matched with the first lens with negative focal length, which is conducive to the smooth entry of light into the rear lens, thereby improving the resolution. At the same time, the first side of the second lens is set to be convex, which changes the trend of the edge light, realizes the reduction of the front port diameter of the optical lens, reduces the volume of the optical lens, is conducive to miniaturization and cost reduction.

[0135] Optionally, the second lens has negative focal length, 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 length, and the first side surface of the second lens is convex, which can further converge the light, reduce the light aperture, and avoid excessive divergence of the object side light. The second side surface is concave, so that the light trend transitions smoothly, which is conducive to controlling the aperture of the rear lens and achieving miniaturization.

[0136] Optionally, the second lens has negative focal length, 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 set to have negative focal length and a double concave structure, which has a divergent effect on light, can disperse the central light and the edge light of each field of view, expand the aperture, increase the illumination of the optical lens, and is conducive to the aberration correction of the edge light and the central light to achieve high resolution.

[0137] In this embodiment, the third lens has positive focal length, the first side surface of the third lens and the second side surface of the third lens are both convex surfaces, and the third lens is set to have positive focal length, which has a convergence effect on the light, on the one hand, the light emitted by the second lens can smoothly enter the rear optical system, and on the other hand, the angle of entering the rear optical system is lowered, the rear port diameter of the optical lens is reduced, and miniaturization is achieved. The third lens is set to a double convex structure, so that the light emitted by the second lens smoothly transitions to the rear, thereby reducing sensitivity, which is conducive to reducing aberrations and improving resolution. At the same time, the light emitted by the second lens is well received by the third lens, reducing the loss of light in 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 surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The fourth lens has positive focal power, the first side surface is convex to receive the second side surface of the third lens which is also convex, the light has roughly the same trend on the second side surface of the third lens and the first side surface of the fourth lens, the light has no large deflection, effectively reduces the loss of light energy caused by reflection between lenses, and improves the illumination of the image plane. Controlling the image side surface of the fourth lens to be concave is conducive to the optical lens having a longer back focus.

[0139] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The 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 convex. The fourth lens with negative optical power is conducive to collecting the light incident through the third lens and appropriately diverging it, so that the light trend transitions smoothly.

[0140] Optionally, 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. The fifth lens is set to have negative optical power, and the fifth lens has a divergent effect on the light. At the same time, the fifth lens is set to be a meniscus concave toward the image side, which is conducive to collecting the light emitted by the fourth lens and making the light trend transition smoothly. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, image quality can be improved, and optical properties such as distortion and CRA can be optimized.

[0141] Optionally, the fifth lens has positive focal length, the first side of the fifth lens is convex, and the second side of the fifth lens is concave. Setting the fifth lens to have positive focal length, and the fifth lens being a positive lens in a cemented lens, in combination with the fourth lens having negative focal length is beneficial to correcting the chromatic aberration of the optical lens, and the convex-concave structure can reduce the degree of deflection of the light emitted by the front lens, which is beneficial to the smooth passage of light, reduces the light energy loss at the interface, improves the relative illumination, and reduces the sensitivity of the optical lens.

[0142] Optionally, the sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have positive focal length and setting the image side surface to be concave is conducive to light convergence, reducing the aperture and total length of the optical lens, and is conducive to miniaturization of the optical lens. At the same time, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is conducive to reducing the risk of ghost images.

[0143] Optionally, the sixth lens has positive focal length, the first side of the sixth lens is convex, and the second side of the sixth lens is convex. The sixth lens is set to have positive focal length and is biconvex, so that the sixth lens can further converge light, effectively reducing the aperture and total length of the rear optical system, and can effectively correct the chromatic aberration of the optical lens when combined with the seventh lens. The second side of the fifth lens and the first side of the sixth lens have obvious shape differences, and the sixth lens significantly changes the light trend. When the aperture of the sixth lens is the same, the front port aperture of the optical lens can be reduced, thereby achieving the purpose of miniaturization of the optical lens.

[0144] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is a concave surface, and the second side surface of the sixth lens is a convex surface. The sixth lens is set to have positive power, and the incident light of the front lens can be converged to the seventh lens, which is beneficial to control the size of CRA, and the surface shape of the first side surface of the sixth lens is relatively flat, which is beneficial to reduce the sensitivity of the optical lens and improve the overall resolution.

[0145] Optionally, the seventh lens has negative focal 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 the radius of curvature is large, and the surface shape is relatively flat. When the light passes through the second side surface of the seventh lens, it has little effect on the light trend, which is conducive to achieving a small CRA while ensuring the luminous flux. The seventh lens has negative focal power, and the second side surface is concave. After the light passes through the second side surface of the sixth lens, the light tends to converge upward, which can make the light quickly accumulate at the height of the imaging surface, which is conducive to expanding the imaging range.

[0146] Optionally, the seventh lens has positive focal 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 focal power, and the shape of the seventh lens is gentle. The seventh lens is an aspherical lens. The aspherical lens has the characteristics of different curvature radii, which can balance the aberration caused by the front lens and improve the resolution of the optical lens.

[0147] In this embodiment, the fourth lens and the fifth lens are glued together to form a glued lens. This arrangement allows the light passing through the front lens to smoothly transition to the rear optical lens, which is beneficial to reducing the total length of the optical lens, so that various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the distortion, CRA and other optical properties can be optimized. At the same time, the glued lens can reduce the air gap between the two lenses and reduce the total length of the optical lens. At the same time, the dispersion of the two lenses is complementary, which is beneficial to reducing chromatic aberration and improving imaging quality. At the same time, the assembly components between the two lenses are reduced, the process is reduced, and the cost is reduced. It can further reduce the field curvature, correct the off-axis point aberration of the optical lens, and the reasonable distribution of focal length is conducive to achieving thermal compensation and obtaining good temperature performance.

[0148] In this embodiment, the optical lens further includes an aperture, which is disposed between the second lens and the third lens. Disposing the aperture between the second lens and the third lens is conducive to effectively converging the light entering the optical lens, reducing the lens aperture at the rear end of the optical lens, and reducing 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 an inflection point.

[0150] Optionally, the second side surface of the second lens has an inflection point. The inflection is beneficial to balancing aberrations and improving resolution.

[0151] In this embodiment, the second lens and the seventh lens are aspherical lenses. Using two aspherical lenses is beneficial to correcting the aberration of the optical lens and improving the resolution.

[0152] In this embodiment, the total optical length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤4. Limiting TTL / F within a reasonable range can effectively limit the length of the optical lens, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤3.

[0153] In this 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. Reasonable setting of the ratio of the radius of curvature of the second side surface of the first lens to the aperture is conducive to reducing the height of the light entering the second lens, which is conducive to achieving a small aperture, while taking into account the processability of the lens, and avoiding the difficulty in molding the first lens due to the small radius of curvature. Preferably, -5≤R2 / D2≤4.

[0154] In this embodiment, the focal length F7 of the seventh lens and the focal length F of the entire optical lens group satisfy: |F7 / F|≤35. Reasonable allocation of the focal length of the seventh lens allows light to enter the optical system smoothly, while facilitating light collection, ensuring light throughput, and improving resolution. Preferably, |F7 / F|≤32.

[0155] In this embodiment, the entrance pupil diameter ENPD of the optical lens satisfies the value F of the entire set of focal lengths of the optical lens: F / ENPD≤2. This configuration enables the optical lens to have a smaller FNO, which is beneficial to increase the amount of light passing through. The increase in the entrance pupil diameter helps to improve the relative illumination, which is beneficial for the optical lens to have clear imaging in a dark environment. Preferably, F / ENPD≤1.8.

[0156] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: BFL / TTL≥0.05. This setting is conducive to the optical lens to achieve a long back focus, and at the same time, it can reserve space for the installation and focusing of optical elements to avoid interference between optical elements. Preferably, BFL / TTL≥0.1.

[0157] In this 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. This arrangement makes the focal lengths of the fourth lens and the fifth lens similar, which helps to smoothly transition the light and correct chromatic aberration. Preferably, -1.8≤F4 / F5≤-0.5.

[0158] In this embodiment, the focal length value F3 of the third lens and the focal length value F6 of the sixth lens satisfy: F3 / F6≤3. Reasonable setting of the focal length ratio of the third lens and the sixth lens helps to better adjust the chromatic aberration and improve the resolution of the optical lens. Preferably, 1≤F3 / F6≤2.5.

[0159] In this 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. Reasonable setting of the focal length ratio of the third lens to the seventh lens helps to better adjust chromatic aberration and improve resolution. Preferably, F3 / F7≤0.25.

[0160] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the focal length F of the entire optical lens group satisfy: R9 / F≥2. Controlling R9 / F within a reasonable range can help smooth the trend of light, especially the smooth trend of light in the edge field of view, better correct aberrations, improve the imaging quality of the optical lens, and achieve high resolution. Preferably, R9 / F≥2.5.

[0161] In this 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 smooth the trend of light, especially the smooth trend of light in the edge field of view, better correct aberrations, improve the imaging quality of the optical lens, and achieve high resolution. Preferably, -15≤R13 / F7≤-0.15.

[0162] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F≤1.5. The focal length of the sixth lens is small, and secondary reflection between lenses is not easy to occur, which reduces the risk of generating ghost images and improves the resolution of the optical lens. Preferably, F6 / F≤1.2.

[0163] In this embodiment, the air interval d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy: d12 / TTL≥0.1. This arrangement allows a certain space interval between the sixth lens and the seventh lens, which is conducive to a smooth transition of light, and is less likely to be reflected between the lenses and at the edges of the lenses, reducing the risk of ghost images. Preferably, d12 / TTL>0.12.

[0164] In this embodiment, 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 satisfy: F3 / R7+F4 / R8≤3. By controlling F3 / R7+F4 / R8 within a reasonable range, it is possible to effectively avoid the ghost image generated by the reflected light from the fourth lens to the seventh lens on the second side surface of the third lens, reduce the ghost image generated at the imaging surface, and effectively improve the imaging quality of the optical lens. Preferably, -5≤F3 / R7+F4 / R8≤1.8.

[0165] In this embodiment, 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 satisfy: R6 / R7≥-0.8. Reasonable setting of 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.

[0166] In this embodiment, 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 satisfy: R11 / R12≤22. Reasonable setting of 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.

[0167] In this embodiment, the curvature radius R2 of the second side surface of the first lens and the focal length value F of the entire optical lens group satisfy: |R2 / F|≤4. Reasonable control of the curvature radius of the second side surface of the first lens and the focal length value of the entire optical lens group is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, the front port diameter is reduced, and it is conducive to miniaturization of the optical lens. Preferably, |R2 / F|≤3.5.

[0168] Embodiment 2

[0169] like Figures 1 to 12 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the first side to the second side, the first lens has a focal power; the second lens has a focal power; the third lens has a positive focal power; the fourth lens has a focal power; the fifth lens has a focal power; the sixth lens has a positive focal power; the seventh lens has a focal power; the radius of curvature R9 of the first side surface of the fifth lens satisfies the whole group focal length value F of the optical lens: R9 / F≥2. Controlling R9 / F within a reasonable range can help smooth the trend of light, especially the smooth trend of light in the edge field of view, 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 a negative optical power, the first side of the first lens is a concave surface, and the second side of the first lens is a concave surface. The first lens is set as a negative lens, which is conducive to proper diffusion of light. At the same time, the first lens is set to 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 collect as much light as possible from a large field of view to enter the rear optical system, increasing the light throughput of the optical lens. The first lens is a spherical lens, and a waterproof film can be added to the first lens, which is conducive to reducing processing costs.

[0171] Optionally, the first lens has a 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 divergent effect on the light, avoiding excessive concentration of the object-side light, and the second side surface of the first lens is a convex surface, which cooperates with the first side surface which is a concave surface, which is conducive to controlling the aperture of the rear lens and facilitating the design of the optical lens in the direction of miniaturization.

[0172] Optionally, the first lens has a negative optical focal length, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface. The first side surface of the first lens is a convex surface, so as to collect as much light of a large field of view as possible to enter the rear optical system, which is beneficial to increase the light throughput of the optical lens and improve the illumination, and is also beneficial to control the aperture of the rear lens and realize a small aperture design; setting the first lens to have a negative optical focal length and setting the second side surface to a concave surface can control the direction of the large-angle light at the edge of the lens, which is beneficial to a smooth transition of light and can reduce the sensitivity of the optical lens.

[0173] Optionally, the first lens has positive focal length, the first side surface of the first lens is convex, and the second side surface of the first lens is convex. Setting the first lens to have positive focal length and a biconvex surface is conducive to collecting more light into the optical lens, improving the overall illumination of the optical lens, and the second side surface of the first lens is set to a convex surface, which has a converging effect on the light, is conducive to compressing the rear light, and realizing a small-caliber and miniaturized design.

[0174] Optionally, the second lens has positive focal length, 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 length and is a meniscus structure convex to the first side surface, so that as much light as possible fills the entrance pupil, which is beneficial to the improvement of the illumination of the imaging surface. The light emitted by the second lens is well received by the third lens, and at the same time, the trend of the light is changed, making the rear optical system smoother.

[0175] Optionally, the second lens has positive focal length, 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 have positive focal length, which has a converging effect on light, and is matched with the first lens with negative focal length, which is conducive to the smooth entry of light into the rear lens, thereby improving the resolution. At the same time, the first side of the second lens is set to be convex, which changes the trend of the edge light, realizes the reduction of the front port diameter of the optical lens, reduces the volume of the optical lens, is conducive to miniaturization and cost reduction.

[0176] Optionally, the second lens has negative focal length, 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 length, and the first side surface of the second lens is convex, which can further converge the light, reduce the light aperture, and avoid excessive divergence of the object side light. The second side surface is concave, so that the light trend transitions smoothly, which is conducive to controlling the aperture of the rear lens and achieving miniaturization.

[0177] Optionally, the second lens has negative focal length, 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 set to have negative focal length and a double concave structure, which has a divergent effect on light, can disperse the central light and the edge light of each field of view, expand the aperture, increase the illumination of the optical lens, and is conducive to the aberration correction of the edge light and the central light to achieve high resolution.

[0178] In this embodiment, the third lens has positive focal length, the first side surface of the third lens and the second side surface of the third lens are both convex surfaces, and the third lens is set to have positive focal length, which has a convergence effect on the light, on the one hand, the light emitted by the second lens can smoothly enter the rear optical system, and on the other hand, the angle of entering the rear optical system is lowered, the rear port diameter of the optical lens is reduced, and miniaturization is achieved. The third lens is set to a double convex structure, so that the light emitted by the second lens smoothly transitions to the rear, thereby reducing sensitivity, which is conducive to reducing aberrations and improving resolution. At the same time, the light emitted by the second lens is well received by the third lens, reducing the loss of light in 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 surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The fourth lens has positive focal power, the first side surface is convex to receive the second side surface of the third lens which is also convex, the light has roughly the same trend on the second side surface of the third lens and the first side surface of the fourth lens, the light has no large deflection, effectively reduces the loss of light energy caused by reflection between lenses, and improves the illumination of the image plane. Controlling the image side surface of the fourth lens to be concave is conducive to the optical lens having a longer back focus.

[0180] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave. The 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 convex. The fourth lens with negative optical power is conducive to collecting the light incident through the third lens and appropriately diverging it, so that the light trend transitions smoothly.

[0181] Optionally, 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. The fifth lens is set to have negative optical power, and the fifth lens has a divergent effect on the light. At the same time, the fifth lens is set to be a meniscus concave toward the image side, which is conducive to collecting the light emitted by the fourth lens and making the light trend transition smoothly. By controlling the focal length of the fifth lens, various aberrations caused by the front positive lens can be effectively corrected, image quality can be improved, and optical properties such as distortion and CRA can be optimized.

[0182] Optionally, the fifth lens has positive focal length, the first side of the fifth lens is convex, and the second side of the fifth lens is concave. Setting the fifth lens to have positive focal length, and the fifth lens being a positive lens in a cemented lens, in combination with the fourth lens having negative focal length is beneficial to correcting the chromatic aberration of the optical lens, and the convex-concave structure can reduce the degree of deflection of the light emitted by the front lens, which is beneficial to the smooth passage of light, reduces the light energy loss at the interface, improves the relative illumination, and reduces the sensitivity of the optical lens.

[0183] Optionally, the sixth lens has positive focal length, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have positive focal length and setting the image side surface to be concave is conducive to light convergence, reducing the aperture and total length of the optical lens, and is conducive to miniaturization of the optical lens. At the same time, the second side surface of the sixth lens has a large curvature and a relatively flat surface, which is conducive to reducing the risk of ghost images.

[0184] Optionally, the sixth lens has positive focal length, the first side of the sixth lens is convex, and the second side of the sixth lens is convex. The sixth lens is set to have positive focal length and is biconvex, so that the sixth lens can further converge light, effectively reducing the aperture and total length of the rear optical system, and can effectively correct the chromatic aberration of the optical lens when combined with the seventh lens. The second side of the fifth lens and the first side of the sixth lens have obvious shape differences, and the sixth lens significantly changes the light trend. When the aperture of the sixth lens is the same, the front port aperture of the optical lens can be reduced, thereby achieving the purpose of miniaturization of the optical lens.

[0185] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is a concave surface, and the second side surface of the sixth lens is a convex surface. The sixth lens is set to have positive power, and the incident light of the front lens can be converged to the seventh lens, which is beneficial to control the size of CRA, and the surface shape of the first side surface of the sixth lens is relatively flat, which is beneficial to reduce the sensitivity of the optical lens and improve the overall resolution.

[0186] Optionally, the seventh lens has negative focal 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 the radius of curvature is large, and the surface shape is relatively flat. When the light passes through the second side surface of the seventh lens, it has little effect on the light trend, which is conducive to achieving a small CRA while ensuring the luminous flux. The seventh lens has negative focal power, and the second side surface is concave. After the light passes through the second side surface of the sixth lens, the light tends to converge upward, which can make the light quickly accumulate at the height of the imaging surface, which is conducive to expanding the imaging range.

[0187] Optionally, the seventh lens has positive focal 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 focal power, and the shape of the seventh lens is gentle. The seventh lens is an aspherical lens. The aspherical lens has the characteristics of different curvature radii, which can balance the aberration caused by the front lens and improve the resolution of the optical lens.

[0188] In this embodiment, the fourth lens and the fifth lens are glued together to form a glued lens. This arrangement allows the light passing through the front lens to smoothly transition to the rear optical lens, which is beneficial to reducing the total length of the optical lens, so that various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the distortion, CRA and other optical properties can be optimized. At the same time, the glued lens can reduce the air gap between the two lenses and reduce the total length of the optical lens. At the same time, the dispersion of the two lenses is complementary, which is beneficial to reducing chromatic aberration and improving imaging quality. At the same time, the assembly components between the two lenses are reduced, the process is reduced, and the cost is reduced. It can further reduce the field curvature, correct the off-axis point aberration of the optical lens, and the reasonable distribution of focal length is conducive to achieving thermal compensation and obtaining good temperature performance.

[0189] In this embodiment, the optical lens further includes an aperture, which is disposed between the second lens and the third lens. Disposing the aperture between the second lens and the third lens is conducive to effectively converging the light entering the optical lens, reducing the lens aperture at the rear end of the optical lens, and reducing 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 an inflection point.

[0191] Optionally, the second side surface of the second lens has an inflection point. The inflection is beneficial to balancing aberrations and improving resolution.

[0192] In this embodiment, the second lens and the seventh lens are aspherical lenses. Using two aspherical lenses is beneficial to correcting the aberration of the optical lens and improving the resolution.

[0193] In this embodiment, the total optical length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤4. Limiting TTL / F within a reasonable range can effectively limit the length of the optical lens, which is conducive to miniaturization of the optical lens. Preferably, TTL / F≤3.

[0194] In this 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. Reasonable setting of the ratio of the radius of curvature of the second side surface of the first lens to the aperture is conducive to reducing the height of the light entering the second lens, which is conducive to achieving a small aperture, while taking into account the processability of the lens, and avoiding the difficulty in molding the first lens due to the small radius of curvature. Preferably, -5≤R2 / D2≤4.

[0195] In this embodiment, the focal length F7 of the seventh lens and the focal length F of the entire optical lens group satisfy: |F7 / F|≤35. Reasonable allocation of the focal length of the seventh lens allows light to enter the optical system smoothly, while facilitating light collection, ensuring light throughput, and improving resolution. Preferably, |F7 / F|≤32.

[0196] In this embodiment, the entrance pupil diameter ENPD of the optical lens satisfies the value F of the entire set of focal lengths of the optical lens: F / ENPD≤2. This configuration enables the optical lens to have a smaller FNO, which is beneficial to increase the amount of light passing through. The increase in the entrance pupil diameter helps to improve the relative illumination, which is beneficial for the optical lens to have clear imaging in a dark environment. Preferably, F / ENPD≤1.8.

[0197] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: BFL / TTL≥0.05. This setting is conducive to the optical lens to achieve a long back focus, and at the same time, it can reserve space for the installation and focusing of optical elements to avoid interference between optical elements. Preferably, BFL / TTL≥0.1.

[0198] In this 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. This arrangement makes the focal lengths of the fourth lens and the fifth lens similar, which helps to smoothly transition the light and correct chromatic aberration. Preferably, -1.8≤F4 / F5≤-0.5.

[0199] In this embodiment, the focal length value F3 of the third lens and the focal length value F6 of the sixth lens satisfy: F3 / F6≤3. Reasonable setting of the focal length ratio of the third lens and the sixth lens helps to better adjust the chromatic aberration and improve the resolution of the optical lens. Preferably, 1≤F3 / F6≤2.5.

[0200] In this 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. Reasonable setting of the focal length ratio of the third lens to the seventh lens helps to better adjust chromatic aberration and improve resolution. Preferably, F3 / F7≤0.25.

[0201] In this 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 smooth the trend of light, especially the smooth trend of light in the edge field of view, better correct aberrations, improve the imaging quality of the optical lens, and achieve high resolution. Preferably, -15≤R13 / F7≤-0.15.

[0202] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F≤1.5. The focal length of the sixth lens is small, and secondary reflection between lenses is not easy to occur, which reduces the risk of generating ghost images and improves the resolution of the optical lens. Preferably, F6 / F≤1.2.

[0203] In this embodiment, the air interval d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy: d12 / TTL≥0.1. This arrangement allows a certain space interval between the sixth lens and the seventh lens, which is conducive to a smooth transition of light, and is less likely to be reflected between the lenses and at the edges of the lenses, reducing the risk of ghost images. Preferably, d12 / TTL>0.12.

[0204] In this embodiment, 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 satisfy: F3 / R7+F4 / R8≤3. By controlling F3 / R7+F4 / R8 within a reasonable range, it is possible to effectively avoid the ghost image generated by the reflected light from the fourth lens to the seventh lens on the second side surface of the third lens, reduce the ghost image generated at the imaging surface, and effectively improve the imaging quality of the optical lens. Preferably, -5≤F3 / R7+F4 / R8≤1.8.

[0205] In this embodiment, 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 satisfy: R6 / R7≥-0.8. Reasonable setting of 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 this embodiment, 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 satisfy: R11 / R12≤22. Reasonable setting of 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 this embodiment, the curvature radius R2 of the second side surface of the first lens and the focal length value F of the entire optical lens group satisfy: |R2 / F|≤4. Reasonable control of the curvature radius of the second side surface of the first lens and the focal length value of the entire optical lens group is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, the front port diameter is reduced, and it is conducive to miniaturization of the optical lens. Preferably, |R2 / F|≤3.5.

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

[0209] In the above optical lens, the maximum field of view FOV of the optical lens is associated with 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 of the first lens to the imaging surface of the optical lens on the optical axis. The optical back focus BFL of the optical lens refers to the distance from the center of the second side of the last lens of the optical lens to the center of the imaging surface.

[0210] The optical lens in the present application may use multiple lenses, such as the seven lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the seventh lens can all use an aspherical lens.

[0211] In an exemplary embodiment, the first lens to the seventh lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, an optical lens with an all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C.

[0212] Specifically, when focusing on resolution quality and reliability, the first to seventh lenses can all be glass aspheric lenses. Of course, in applications where temperature stability requirements are low, the first to seventh lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first to seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0213] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0214] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, 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 further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0216] Example 1

[0217] like Figure 1 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

[0219] In this 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 this example, the fourth lens and the fifth lens are cemented lenses, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0221] In this example, the first side surface of the seventh lens and the second side surface of the seventh lens are configured to be inversely curved.

[0222] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0223]

[0224]

[0225] Table 1

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

[0227]

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

[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 2

[0232] like Figure 2As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

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

[0236] In this example, the first side surface of the seventh lens and the second side surface of the seventh lens are configured to be inversely curved.

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

[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 lens and the seventh lens are aspherical lenses. Table 4 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface 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 includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

[0247] In this example, the fourth lens and the fifth lens are cemented lenses, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface 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 configured to be recurved.

[0249] Table 5 shows the basic structural parameters of the optical lens of Example 3, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0250]

[0251]

[0252] Table 5

[0253] In this example, the second lens and the seventh lens are aspherical lenses. Table 6 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for 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 includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

[0259] In this example, the focal length F of the optical lens is 15.2607 mm, the total 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, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0261] 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 configured to be recurved.

[0262] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[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 aspherical lenses. Table 8 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface 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 includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

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

[0273] In this example, the first side surface of the seventh lens and the second side surface of the seventh lens are configured to be inversely curved.

[0274] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0275]

[0276]

[0277] Table 9

[0278] In this example, the second lens and the seventh lens are aspherical lenses. Table 10 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this 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 6

[0282] like Figure 6 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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.

[0283] The first lens L1 has negative power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is concave, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

[0284] In this 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 this example, the fourth lens and the fifth lens are cemented lenses, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

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

[0287] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[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 this example, the second lens and the seventh lens are aspherical lenses. Table 12 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this 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 7

[0294] like Figure 7 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is concave, and the second side surface S14 of the seventh lens is convex. 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface 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, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0298] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[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 coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this example.

[0302]

[0303]

[0304] Table 14

[0305] Example 8

[0306] like Figure 8 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has positive power, the first side surface S13 of the seventh lens is concave, and the second side surface S14 of the seventh lens is convex. 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

[0308] In this example, the focal length F of the optical lens is 14.7435 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 34.057°.

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

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

[0311]

[0312]

[0313] Table 15

[0314] In this example, the second lens and the seventh lens are aspherical lenses. Table 16 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface 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 Fig. 9 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

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

[0322] In this example, the first side surface of the seventh lens and the second side surface of the seventh lens are configured to be inversely curved.

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

[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 lens and the seventh lens are aspherical lenses. Table 18 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for 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 Fig.10 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is concave, and the second side surface S2 of the first lens is concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has negative power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

[0332] In this example, the focal length F of the optical lens is 15.3486 mm, the total 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, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

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

[0335] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[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 aspherical lenses. Table 20 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface 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 Fig.11 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

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

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

[0347]

[0348]

[0349] Table 21

[0350] In this example, the second lens and the seventh lens are aspherical lenses. Table 22 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for 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 Fig.12 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture 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 power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S6 of the third lens is convex, and the second side surface S7 of the third lens is convex. The fourth lens L4 has negative power, the first side surface S8 of the fourth lens is convex, and the second side surface S9 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is convex. The seventh lens L7 has negative power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is concave. The 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 the object passes through the surfaces S1 to S18 in sequence and is finally imaged on the imaging surface IMA.

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

[0357] In this example, the fourth lens and the fifth lens are cemented lenses, and the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0358] Table 23 shows the basic structural parameters of the optical lens of Example 12, wherein the units of the radius of curvature Radius and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[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 this example, the second lens and the seventh lens are aspherical lenses. Table 24 shows the conic coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this 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 1 to 12 satisfy the relationship shown in Table 25.

[0365]

[0366]

[0367] Table 25 and Table 26 give the focal length values ​​F (unit: mm) of the entire group of optical lenses of Examples 1 to 12.

[0368] Parameters / Examples 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 invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0371] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0372] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0373] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having an optical power; a second lens having optical power; A third lens, the third lens has positive optical power, and the first side surface of the third lens and the second side surface of the third lens are both convex surfaces; a fourth lens, wherein the fourth lens has optical power, a first side surface of the fourth lens is a convex surface, and a second side surface of the fourth lens is a concave surface; a fifth lens having optical power, a first side surface of the fifth lens being a convex surface, and a second side surface of the fifth lens being a concave surface; a sixth lens having positive optical power, wherein 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; A seventh lens has optical power, and a first side surface of the seventh lens and a second side surface of the seventh lens have opposite surface shapes.

2. The optical lens according to claim 1, characterized in that: A curvature radius R13 of the first side surface of the seventh lens and a focal length F7 of the seventh lens satisfy the following relationship: R13 / F7≤-0.

1.

3. The optical lens according to claim 1, characterized in that: The focal length value F6 of the sixth lens and the focal length value F of the entire set of optical lenses satisfy the following condition: F6 / F≤1.

5.

4. The optical lens according to claim 1, characterized in that: The air interval d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy the following relationship: d12 / TTL≥0.

1.

5. The optical lens according to claim 1, characterized in that: 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 satisfy: F3 / R7+F4 / R8≤3.

6. The optical lens according to claim 1, characterized in that: 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.

7. The optical lens according to claim 1, characterized in that: 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.

8. The optical lens according to claim 1, characterized in that: The curvature radius R2 of the second side surface of the first lens satisfies the following relationship with the focal length F of the entire optical lens set: |R2 / F|≤4.

9. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having an 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 refractive power; a seventh lens having optical power; A curvature radius R9 of the first side surface of the fifth lens satisfies the following relationship with the entire focal length F of the optical lens: R9 / F≥2.

10. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images