Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with positive focal power, a second lens with negative focal power and a third lens with positive focal power, the second lens has positive focal power, and the first side surface of the second lens is a convex surface; the third lens has negative focal power, and the second side surface of the third lens is a concave surface; the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a concave surface; the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the first side surface of the sixth lens is a concave surface; and the seventh lens has positive focal power, and the first side surface of the seventh lens is a convex surface. The problem that an optical lens in the prior art is difficult to give consideration to large aperture, miniaturization, small CRA, low cost and high illumination at the same time is solved.

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] In recent years, with the development of the optical field, the demand for optical lenses in daily life has increased, and optical lenses have been applied to more and more scenarios. For example, in the automobile driving industry, for driving safety, it is necessary to detect the driving environment more accurately, and optical lenses have become a key device for detecting information around the car. Especially with the continuous development of autonomous driving technology, traditional pure visual autonomous driving systems can no longer meet people's requirements for autonomous driving safety and reliability. Gated cameras that can simultaneously detect object distance and shape information have become the development trend of autonomous driving technology.

[0003] The principle of the optical lens of the vehicle-mounted gated camera is: through the high-speed switching shutter and the active illumination laser light source, the light signals reflected to the camera at different times can be received, so as to realize the imaging of objects in front of different depths of field. However, due to the extremely fast propagation speed of light, the shutter of the camera is open for a very short time each time. In order to achieve more accurate detection, it is necessary to increase the number of photons reaching the image plane per unit time and improve the signal-to-noise ratio. Existing vehicle-mounted access control optical lenses usually have some problems. For example, due to the limited intensity of the active infrared light source matched with the vehicle-mounted access control camera optical lens, there is a problem of insufficient light entering the lens after reflection, which affects the image quality; at the same time, since the vehicle-mounted access control camera optical lens requires a larger sensor to increase the amount of light entering a single pixel, its size is generally large and difficult to miniaturize; in addition, since the vehicle-mounted access control camera optical lens is large in size, more materials are required, the process is more difficult, and the cost itself is high. Due to cost constraints, more expensive materials and aspherical lenses cannot be used; and since the large aperture light beam of the large aperture lens has poor imaging quality, its edge field of view will intercept more large aperture light beams to ensure imaging quality, so it is difficult to achieve high illumination in the edge field of view, reduce the cone angle when the light reaches the imaging surface, and the incident angle of the main light.

[0004] That is to say, the optical lens in the prior art has the problem that it is difficult to simultaneously take into account large aperture, miniaturization, small CRA, low cost and high illumination. Summary of the invention

[0005] The main purpose of the present invention is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has a large aperture, miniaturization, a small CRA, a low cost and a high illumination that are difficult to take into account at the same time.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, an optical lens is provided, which comprises, from the first side to the second side: a first lens with positive optical power, wherein the first side surface of the first lens is a convex surface; a second lens with positive optical power, wherein the first side surface of the second lens is a convex surface; a third lens with negative optical power, wherein the second side surface of the third lens is a concave surface; a fourth lens with negative optical power, wherein the first side surface of the fourth lens is a concave surface, and the second side surface is a concave surface; a fifth lens with positive optical power, wherein the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface; a sixth lens with negative optical power, wherein the first side surface of the sixth lens is a concave surface; and a seventh lens with positive optical power, wherein the first side surface of the seventh lens is a convex surface.

[0007] Furthermore, the second side surface of the first lens is a concave surface.

[0008] Furthermore, the second side surface of the first lens is a convex surface.

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

[0010] Furthermore, the second side surface of the second lens is a convex surface.

[0011] Furthermore, the first side surface of the third lens is a convex surface.

[0012] Furthermore, the first side surface of the third lens is a concave surface.

[0013] Furthermore, the second side surface of the sixth lens is a convex surface.

[0014] Furthermore, the second side surface of the sixth lens is a concave surface.

[0015] Furthermore, the second side surface of the seventh lens is a concave surface.

[0016] Furthermore, the second side surface of the seventh lens is a convex surface.

[0017] Furthermore, the second lens and the third lens are cemented together to form a doublet lens.

[0018] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0019] Furthermore, a curvature radius R11 of the first side surface of the sixth lens element and a focal length value F of the entire optical lens group satisfy: R11 / F≤-0.05.

[0020] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the center of the imaging surface and the entire focal length value F of the optical lens satisfy: TTL / F≤1.5.

[0021] Furthermore, the air interval d5 between the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: d5 / F≤0.3.

[0022] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the clear aperture D of the first side surface of the first lens satisfy: F / ENPD / D≤0.2.

[0023] Furthermore, the actual image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.2.

[0024] Furthermore, the light clearance diameter D14 of the second side surface of the seventh lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D14 / H≤2.

[0025] Furthermore, the center thickness d3 of the second lens, the center thickness d4 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface satisfy: (d3+d4) / TTL≥0.03.

[0026] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8.

[0027] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥45.

[0028] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the clear aperture D of the first side surface of the first lens satisfy: F*θ / D≥0.08.

[0029] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: F6 / F≤-0.1.

[0030] Further, the curvature radius R3 of the first side surface of the second lens satisfies the following relationship with the entire focal length value F of the optical lens: R3 / F≥0.08. Further, the entire focal length value F of the optical lens satisfies the following relationship with the actual image height H corresponding to the maximum field of view of the optical lens: F / H≥1.1.

[0031] Furthermore, the focal length value F4 of the fourth lens element and the focal length value F of the entire optical lens group satisfy: F4 / F≤-0.1.

[0032] Furthermore, the focal length value F2 of the second lens element and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.05.

[0033] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface satisfy: d11 / TTL≤0.07.

[0034] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F≥0.1.

[0035] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, in order: a first lens having positive power; a second lens having positive power; a third lens having negative power; a fourth lens having negative power; a fifth lens having positive power; a sixth lens having negative power; and a seventh lens having positive power; wherein a radius of curvature R11 of a first side surface of the sixth lens satisfies the following relation with a focal length value F of the entire group of the optical lens: R11 / F≤-0.05.

[0036] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface is a concave surface.

[0037] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface is a convex surface.

[0038] Furthermore, the first side surface of the second lens is a convex surface, and the second side surface is a concave surface.

[0039] Furthermore, the first side surface of the second lens is a convex surface, and the second side surface is a convex surface.

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

[0041] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface is a concave surface.

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

[0043] Furthermore, the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface.

[0044] Furthermore, the first side surface of the sixth lens is a concave surface, and the second side surface is a convex surface.

[0045] Furthermore, the first side surface of the sixth lens is a concave surface, and the second side surface is a concave surface.

[0046] Furthermore, the first side surface of the seventh lens is a convex surface, and the second side surface is a concave surface.

[0047] Furthermore, the first side surface of the seventh lens is a convex surface, and the second side surface is a convex surface.

[0048] Furthermore, the second lens and the third lens are cemented together to form a doublet lens.

[0049] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0050] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the center of the imaging surface and the entire focal length value F of the optical lens satisfy: TTL / F≤1.5.

[0051] Furthermore, the air interval d5 between the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: d5 / F≤0.3.

[0052] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the clear aperture D of the first side surface of the first lens satisfy: F / ENPD / D≤0.2.

[0053] Furthermore, the actual image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.2.

[0054] Furthermore, the light clearance diameter D14 of the second side surface of the seventh lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D14 / H≤2.

[0055] Furthermore, the center thickness d3 of the second lens, the center thickness d4 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface satisfy: (d3+d4) / TTL≥0.03.

[0056] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8.

[0057] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥45.

[0058] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the clear aperture D of the first side surface of the first lens satisfy: F*θ / D≥0.08.

[0059] Furthermore, the focal length F6 of the sixth lens element and the focal length F of the entire optical lens group satisfy: F6 / F≤-0.1.

[0060] Furthermore, a curvature radius R3 of the first side surface of the second lens and a focal length value F of the entire optical lens group satisfy: R3 / F≥0.08.

[0061] Furthermore, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≥1.1.

[0062] Furthermore, the focal length value F4 of the fourth lens element and the focal length value F of the entire optical lens group satisfy: F4 / F≤-0.1.

[0063] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F≥0.1.

[0064] Furthermore, the focal length value F2 of the second lens element and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.05.

[0065] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface satisfy: d11 / TTL≤0.07.

[0066] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0067] According to the technical solution of the present invention, the optical lens comprises, from the first side to the second side, a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with positive focal power, wherein the first side surface of the first lens is a convex surface; the first side surface of the second lens is a convex surface; the second side surface of the third lens is a concave surface; the first side surface of the fourth lens is a concave surface, and the second side surface is a concave surface; the first side surface of the fifth lens is a convex surface, and the second side surface is a convex surface; the first side surface of the sixth lens is a concave surface; and the first side surface of the seventh lens is a convex surface.

[0068] The first lens has positive focal length, and the first side surface of the first lens is convex, which is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens; the second side surface can be convex or concave. When the second side surface of the first lens is concave, it helps to refract light more smoothly, which is conducive to reducing the tolerance sensitivity of the lens; when the second side surface of the first lens is convex, the biconvex shape is combined with the positive focal length, which is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens.

[0069] The second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface can be concave or convex. When the second side surface of the second lens is concave, the shape is a crescent, which can smoothly receive and further converge the light, which is beneficial to increase the aperture and increase the amount of light entering; when the second side surface of the second lens is convex, the shape is biconvex and the lens shape is flat, which can receive and further converge the light, reduce the total length of the system, and is beneficial to increase the aperture of the optical lens and increase the amount of light entering.

[0070] The third lens has negative focal power, and the first side of the third lens can be convex or concave, and the second side is concave; when the first side of the third lens is convex, the shape is a crescent, and the shape is gentle, which is conducive to receiving the light converged by the first lens and the second lens, reducing the light energy loss at the interface, and making it smoothly transition to the aperture, reducing the system sensitivity; when the first side of the third lens is concave, the shape is biconcave and the lens shape is gentle, which can reduce the degree of deflection of the light emitted by the front lens, which is conducive to the smooth passage of light, reducing the light energy loss at the interface, improving the relative illumination, and reducing the system sensitivity. The fourth lens has negative focal power, and the first side of the fourth lens is concave, and the second side is concave. The fourth lens adopts a biconcave shape, which can diverge the light beam passing through the aperture, increase the light cone angle, and help reduce CRA and improve illumination.

[0071] The fifth lens has positive power, the first side surface of the fifth lens is convex, and the second side surface is convex. The fifth lens is biconvex and can cooperate with the negative power lenses of the fourth lens and the sixth lens to correct the field curvature.

[0072] The sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface can be convex or concave. When the second side surface of the sixth lens is convex, it is in the shape of a crescent, which can receive and diverge the light in front, so that the edge field of view light beam reaches the seventh lens at a higher height and a wider width, which is conducive to increasing the cone angle of the edge field of view light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field of view. When the second side surface of the sixth lens is concave, it is in the shape of a double concave, which can receive and diverge the light in front, so that the edge field of view light beam reaches the seventh lens at a higher height and a wider width, which is conducive to increasing the cone angle of the edge field of view light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field of view.

[0073] The seventh lens has positive focal power, and the first side surface of the seventh lens is convex, and the second side surface can be convex or concave. When the second side surface of the seventh lens is concave, the shape is a crescent, which can make the light converge to the imaging surface, which is conducive to reducing the back working distance of the optical lens and achieving a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface; the second side surface is concave, which is conducive to smoothing the light and improving the resolution. When the second side surface of the seventh lens is convex, the shape is biconvex, which can make the light converge to the imaging surface faster, which is conducive to reducing the back working distance of the optical lens and achieving a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface.

[0074] The present application adopts seven lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of large aperture, miniaturization, small CRA, low cost and high illumination. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] 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:

[0076] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0077] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0078] Figure 3 A schematic diagram showing the structure of an optical lens according to Example 3 of the present invention is shown;

[0079] Figure 4 A schematic diagram showing the structure of an optical lens according to Example 4 of the present invention is shown;

[0080] Figure 5A schematic diagram showing the structure of an optical lens according to Example 5 of the present invention is shown;

[0081] Figure 6 A schematic diagram showing the structure of an optical lens according to Example 6 of the present invention is shown;

[0082] Figure 7 A schematic diagram showing the structure of an optical lens according to Example 7 of the present invention is shown;

[0083] Figure 8 A schematic diagram showing the structure of an optical lens according to Example 8 of the present invention is shown;

[0084] Fig. 9 A schematic diagram showing the structure of an optical lens according to Example 9 of the present invention is shown;

[0085] Fig.10 A schematic diagram showing the structure of an optical lens according to Example 10 of the present invention is shown;

[0086] Fig.11 A schematic diagram showing the structure of an optical lens according to Example 11 of the present invention is shown;

[0087] Fig.12 A schematic structural diagram of an optical lens according to Example 12 of the present invention is shown.

[0088] The above drawings include the following reference numerals:

[0089] L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; L3, third lens; S4, first side surface of the third lens; S5, second side surface of the third lens; STO, aperture; L4, fourth lens; S7, first side surface of the fourth lens; S8, second side surface of the fourth lens; L5, fifth lens; S9, first side surface of the fifth lens; S10, second side surface of the fifth lens; L6, sixth lens; S11, first side surface of the sixth lens; S12, second side surface of the sixth lens; L7, seventh lens; S13, first side surface of the seventh lens; S14, second side surface of the seventh lens; S15, first side surface of the protective glass; S16, second side surface of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 first side is called the first side of the lens, and the surface of each lens close to the second 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 knowledgeable person 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.

[0096] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0097] In an exemplary embodiment, the optical lens provided by the present application can be used as a vehicle-mounted lens. For the vehicle-mounted lens, the left side is the object side and the right side is the image side; the first side is the object side and the second side is the image side. Light from the object side can be imaged on the image side.

[0098] When the optical lens of the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. 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, and the imaging surface of the optical lens is the image source surface.

[0099] In order to solve the problem that it is difficult to simultaneously take into account large aperture, miniaturization, small CRA, low cost and high illumination in the optical lens in the prior art, the present invention provides an optical lens and an electronic device.

[0100] Embodiment 1

[0101] like Figures 1 to 12 As shown, the optical lens includes, from the first side to the second side, a first lens with positive power, a second lens with positive power, a third lens with negative power, a fourth lens with negative power, a fifth lens with positive power, a sixth lens with negative power and a seventh lens with positive power, wherein the first side surface of the first lens is convex; the first side surface of the second lens is convex; the second side surface of the third lens is concave; the first side surface of the fourth lens is concave, and the second side surface is concave; the first side surface of the fifth lens is convex, and the second side surface is convex; the first side surface of the sixth lens is concave; and the first side surface of the seventh lens is convex.

[0102] The first lens has positive focal length, and the first side surface of the first lens is convex, which is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens; the second side surface can be convex or concave. When the second side surface of the first lens is concave, it helps to refract light more smoothly, which is conducive to reducing the tolerance sensitivity of the lens; when the second side surface of the first lens is convex, the biconvex shape is combined with the positive focal length, which is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens.

[0103] The second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface can be concave or convex. When the second side surface of the second lens is concave, the shape is a crescent, which can smoothly receive and further converge the light, which is beneficial to increase the aperture and increase the amount of light entering; when the second side surface of the second lens is convex, the shape is biconvex and the lens shape is flat, which can receive and further converge the light, reduce the total length of the system, and is beneficial to increase the aperture of the optical lens and increase the amount of light entering.

[0104] The third lens has negative optical power, and the first side surface of the third lens can be convex or concave, and the second side surface is concave; when the first side surface of the third lens is convex, the shape is a crescent, and the shape is gentle, which is conducive to receiving the light converged by the first lens and the second lens, reducing the light energy loss at the interface, and making it smoothly transition to the aperture, reducing the system sensitivity; when the first side surface of the third lens is concave, the shape is double concave and the lens shape is gentle, which can reduce the deflection degree of the light emitted by the front lens, which is conducive to the smooth passage of light, reducing the light energy loss at the interface, improving the relative illumination, and reducing the system sensitivity.

[0105] The fourth lens has negative power, a first side surface of the fourth lens is concave, and a second side surface of the fourth lens is concave. The fourth lens adopts a biconcave shape, which can diverge the light beam passing through the aperture, increase the light cone angle, and is conducive to reducing CRA and improving illumination.

[0106] The fifth lens has positive power, the first side surface of the fifth lens is convex, and the second side surface is convex. The fifth lens is biconvex and can cooperate with the negative power lenses of the fourth lens and the sixth lens to correct the field curvature.

[0107] The sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface can be convex or concave. When the second side surface of the sixth lens is convex, it is in the shape of a crescent, which can receive and diverge the light in front, so that the edge field of view light beam reaches the seventh lens at a higher height and a wider width, which is conducive to increasing the cone angle of the edge field of view light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field of view. When the second side surface of the sixth lens is concave, it is in the shape of a double concave, which can receive and diverge the light in front, so that the edge field of view light beam reaches the seventh lens at a higher height and a wider width, which is conducive to increasing the cone angle of the edge field of view light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field of view.

[0108] The seventh lens has positive focal power, and the first side surface of the seventh lens is convex, and the second side surface can be convex or concave. When the second side surface of the seventh lens is concave, the shape is a crescent, which can make the light converge to the imaging surface, which is conducive to reducing the back working distance of the optical lens and achieving a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface; the second side surface is concave, which is conducive to smoothing the light and improving the resolution. When the second side surface of the seventh lens is convex, the shape is biconvex, which can make the light converge to the imaging surface faster, which is conducive to reducing the back working distance of the optical lens and achieving a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface.

[0109] The present application adopts seven lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of large aperture, miniaturization, small CRA, low cost and high illumination.

[0110] In this embodiment, the second side surface of the first lens is a concave surface, which helps to deflect the light more gently and helps to reduce the tolerance sensitivity of the lens.

[0111] In this embodiment, the second side surface of the first lens is a convex surface. The biconvex shape with positive optical power is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens.

[0112] In this embodiment, the second side surface of the second lens is a concave surface and has a meniscus shape, which can stably receive and further converge the light, which is beneficial to increase the aperture and improve the amount of light entering.

[0113] In this embodiment, the second side surface of the second lens is a convex surface. The shape is double convex and the lens shape is gentle, which can receive and further converge light, reduce the total length of the system, and is conducive to increasing the aperture of the optical lens and increasing the amount of light entering.

[0114] In this embodiment, the first side surface of the third lens is a convex surface, and has a meniscus shape, which is gentle and is conducive to receiving the light converged by the first lens and the second lens, reducing the light energy loss at the interface, and making it smoothly transition to the aperture, thereby reducing the system sensitivity.

[0115] In this embodiment, the first side surface of the third lens is concave. The shape is double concave and the lens shape is gentle, which can reduce the degree of deflection of the light emitted by the front lens, facilitate the smooth passage of light, reduce the light energy loss at the interface, improve the relative illumination, and reduce the system sensitivity.

[0116] In this embodiment, the second side surface of the sixth lens is a convex surface. The shape is a crescent, which can receive and diverge the front light, so that the edge field light beam reaches the seventh lens with a higher height and a wider width, which is beneficial to increase the cone angle of the edge field light beam when it reaches the imaging surface and reduce the incident angle of the main light, thereby improving the relative illumination of the edge field.

[0117] In this embodiment, the second side surface of the sixth lens is a concave surface. The shape is double concave, which can receive and diverge the front light, so that the edge field light beam reaches the seventh lens with a higher height and a wider width, which is conducive to increasing the cone angle of the edge field light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field.

[0118] In this embodiment, the second side surface of the seventh lens is a concave surface. The shape is a meniscus, which can make the light converge to the imaging surface, which is beneficial to reduce the rear working distance of the optical lens and achieve a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface; the second side surface is a concave surface, which is beneficial to smooth the light and improve the resolution.

[0119] In this embodiment, the second side surface of the seventh lens is a convex surface. The double convex shape can make the light converge to the imaging surface more quickly, which is beneficial to reduce the rear working distance of the optical lens and achieve a smaller total length of the optical lens. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface.

[0120] In this embodiment, the second lens and the third lens are bonded to form a double bonded lens. The use of the double bonded lens can effectively correct chromatic aberration, reduce the total length of the optical lens, and allow the light to smoothly transition to the rear system, thereby optimizing the CRA, illumination, distortion and other performances of the optical system. The second lens has positive focal length, which is conducive to further converging the light converged by the first lens and achieving a large aperture. When matched with the negative focal length lens of the third lens, it is conducive to a smooth transition of the light to the rear end and improved resolution. The second lens is made of a material with a low refractive index and a large Abbe number, and the third lens is made of a material with a high refractive index and a small Abbe number. The bonding of the two material lenses can effectively correct the chromatic aberration of the optical system. At the same time, the second lens and the third lens are bonded together, which reduces the number of assembly parts between the two lenses, which is conducive to reducing the process and the overall weight, and reducing costs. It can also reduce the loss of light energy caused by reflection between lenses, improve the illumination of the image plane, and weaken ghost images. The focal lengths of the double-bonded lenses are similar, which is conducive to a smooth transition of light and improved image quality. Since the light transitions smoothly when passing through the bonding surface, the sensitivity to tolerances such as eccentricity and tilt between the two lenses is low, so the sensitivity to tolerances of the lenses during assembly can be reduced. The double-bonded lenses are conducive to a reasonable distribution of focal lengths, help to achieve thermal compensation, and improve the performance of optical lenses at different temperatures.

[0121] In this embodiment, the optical lens further includes an aperture, which is arranged between the third lens and the fourth lens. The first lens and the second lens are both positive in power, which is conducive to converging a wider light beam into the system, thereby achieving a larger aperture, while the third lens has a negative power, which is conducive to smoothing the light converging in front and eliminating aberrations at the same time; the light after passing through the third lens has a relatively stable trend, and the aberrations are effectively eliminated. Arranging an aperture here is conducive to achieving a large aperture, high resolution and lower tolerance sensitivity.

[0122] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens satisfies the following relationship with the focal length F of the entire optical lens group: R11 / F≤-0.05. The first side surface of the sixth lens is concave, which is conducive to diverging the light beam and can increase the height and width of the large field of view light beam when it reaches the seventh lens, which is conducive to increasing the cone angle when the light reaches the imaging surface and reducing the incident angle of the main light, achieving a small CRA, and improving the relative illumination of the edge field of view. Preferably, R11 / F≤-0.1.

[0123] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the center of the imaging surface, and the whole group focal length value F of the optical lens satisfy: TTL / F≤1.5. By constraining this conditional expression, the ratio of the total optical length of the optical lens to the whole group focal length value of the optical lens is very small, which is conducive to reducing the length of the optical lens and achieving miniaturization under the same focal length. Preferably, TTL / F≤1.4.

[0124] In this embodiment, the air gap d5 between the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens set: d5 / F≤0.3. Satisfying this conditional expression is conducive to shortening the air gap between the third lens and the fourth lens, and is conducive to reducing the total length of the optical lens. Preferably, 0 <d5 / F≤0.25。

[0125] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the aperture D of the first side surface of the first lens satisfy: F / ENPD / D≤0.2. When this condition is met, when the front port diameter is constant, a larger aperture can be achieved, which is beneficial to increase the amount of light entering and improve the illumination of the imaging surface. Preferably, F / ENPD / D≤0.1.

[0126] In this embodiment, the actual image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.2. Satisfying this conditional expression makes the difference between the ideal image height and the actual image height smaller, and smaller distortion can be achieved. Preferably, |(HF*θ) / (F*θ)|≤0.08.

[0127] In this embodiment, the clear aperture D14 of the second side surface of the seventh lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D14 / H≤2. By constraining this conditional expression, the clear aperture of the second side surface of the seventh lens is close to the maximum image height, which is beneficial to reduce the incident angle of the main light on the imaging surface and improve the relative illumination of the edge field of view. Preferably, 0.8≤D14 / H≤1.5.

[0128] In this embodiment, the center thickness d3 of the second lens, the center thickness d4 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface, satisfy: (d3+d4) / TTL≥0.03. By constraining this conditional expression, appropriately increasing the center thickness of the double-cemented lens within a certain range is conducive to enhancing the ability to control light, and is conducive to controlling more light to enter the rear system and improving relative illumination. Preferably, (d3+d4) / TTL≥0.06.

[0129] In this embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8. By constraining this conditional expression, the aperture of the optical lens is made larger, so that more light can reach the imaging surface, thereby improving the illumination at the imaging surface. Preferably, F / ENPD≤1.6.

[0130] In this embodiment, the maximum field of view FOV of the optical lens, the focal length value F of the entire set of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥45. By constraining this conditional expression, under the condition of a fixed image height, the focal length is longer, which is conducive to achieving a large angular resolution. Preferably, FOV*F / H≥50. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0131] In this embodiment, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the light aperture D of the first side surface of the first lens satisfy: F*θ / D≥0.08. When this conditional expression is satisfied, when the focal length and field angle of the optical lens are fixed, the front port aperture is guaranteed to be smaller, which is conducive to the miniaturization of the optical lens. Preferably, F*θ / D≥0.15.

[0132] 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≤-0.1. By constraining this conditional expression, the focal length of the sixth lens is guaranteed to be negative, which is conducive to increasing the height of the edge field of view light beam at the seventh lens, reducing its main light incident angle at the imaging surface, and improving the relative illumination of the edge of the imaging surface. Preferably, -2≤F6 / F≤-0.3.

[0133] In this embodiment, the radius of curvature R3 of the first side surface of the second lens satisfies the value F of the entire group focal length of the optical lens: R3 / F≥0.08. The first side surface of the second lens is convex, which is conducive to quickly converging light, reducing the total length of the system, and is more conducive to converging a wider light beam into the lens, increasing the amount of light entering the lens, and thus improving the illumination of the image plane. Preferably, R3 / F≥0.15.

[0134] In this embodiment, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: F / H ≥ 1.1. Satisfying this conditional expression is conducive to improving the ratio of focal length to image height and achieving high angular resolution. Preferably, F / H ≥ 1.5.

[0135] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≤-0.1. The fourth lens adopts negative focal power, and the front lens can allocate more positive focal power, thereby converging a wider light beam into the aperture to achieve a large aperture; at the same time, the light converged in the front can be smoothly transitioned to improve the resolution. Preferably, F4 / F≤-0.2.

[0136] In this embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F ≥ 0.1. The first lens adopts a positive focal length, which is conducive to converging a wider light beam into the optical lens, increasing the amount of light entering the optical lens, and thus improving the illumination of the imaging surface. Preferably, F1 / F ≥ 0.3

[0137] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.05. The second lens adopts a positive focal length, which is conducive to converging a wider light beam into the lens, increasing the amount of light entering the lens, thereby increasing the illumination of the image plane, and is conducive to quickly converging light and reducing the total length of the system. Preferably, F2 / F≥0.15.

[0138] In this embodiment, the center thickness d11 of the sixth lens satisfies the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface: d11 / TTL≤0.07. Satisfying this conditional formula can make the ratio of the center thickness of the sixth lens to the total optical length of the optical lens smaller. When the total optical length is the same, the center thickness of the sixth lens is smaller, which is beneficial to increase the cone angle of the edge field of view light beam when it reaches the imaging surface and reduce the incident angle of the main light, thereby improving the relative illumination of the edge field of view. Preferably, d11 / TTL≤0.05.

[0139] Embodiment 2

[0140] like Figures 1 to 12As shown, the optical lens includes, from the first side to the second side, in sequence: a first lens with positive focal power; a second lens with positive focal power; a third lens with negative focal power; a fourth lens with negative focal power; a fifth lens with positive focal power; a sixth lens with negative focal power; a seventh lens with positive focal power; the radius of curvature R11 of the first side surface of the sixth lens and the focal length value F of the entire group of the optical lens satisfy: R11 / F≤-0.05. The first side surface of the sixth lens adopts a concave surface, which is conducive to diverging the light beam, and can increase the height and width of the large field of view light beam when it reaches the seventh lens, which is conducive to increasing the cone angle when the light reaches the imaging surface and reducing the incident angle of the main light, so as to achieve a small CRA and improve the relative illumination of the edge field of view. Preferably, R11 / F≤-0.1.

[0141] In this embodiment, the first side surface of the first lens is convex, and the second side surface is concave. The first lens has positive focal power, and the first side surface of the first lens is convex, which is conducive to quickly converging light, reducing the total length of the system, and collecting light with a larger aperture, and increasing the amount of light entering the optical lens; the second side surface of the first lens is concave, which helps to deflect the light more gently, and helps to reduce the tolerance sensitivity of the lens.

[0142] In this embodiment, the first side surface of the first lens is a convex surface, and the second side surface is a convex surface. The first lens has positive focal length, and the first side surface of the first lens is a convex surface, which is conducive to collecting light with a larger aperture and increasing the amount of light entering the optical lens; the second side surface of the first lens is a convex surface, and the biconvex shape with positive focal length is conducive to quickly converging light, reducing the total length of the system, collecting light with a larger aperture, and increasing the amount of light entering the optical lens.

[0143] In this embodiment, the first side surface of the second lens is convex, and the second side surface is concave. The shape is a crescent, which can smoothly receive and further converge the light, which is conducive to increasing the aperture and improving the amount of light entering.

[0144] In this embodiment, the first side surface of the second lens is convex, and the second side surface is convex. The shape is double convex and the lens shape is gentle, which can receive and further converge light, reduce the total length of the system, and is conducive to increasing the aperture of the optical lens and increasing the amount of light entering.

[0145] In this embodiment, the first side surface of the third lens is convex, and the second side surface is concave. The shape is a meniscus, and the shape is gentle, which is conducive to receiving the light converged by the first lens and the second lens, reducing the light energy loss at the interface, and making it smoothly transition to the aperture, reducing the system sensitivity.

[0146] In this embodiment, the first side surface of the third lens is concave, and the second side surface is concave. The shape is double concave and the lens shape is gentle, which can reduce the degree of deflection of the light emitted by the front lens, facilitate the smooth passage of light, reduce the light energy loss at the interface, improve the relative illumination, and reduce the system sensitivity.

[0147] In this embodiment, the first side surface of the fourth lens is concave, and the second side surface is concave. The fourth lens adopts a biconcave shape, which can diverge the light beam passing through the aperture, increase the light cone angle, and is conducive to reducing CRA and improving illumination.

[0148] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The fifth lens is biconvex, and can cooperate with the negative power lens of the fourth lens and the sixth lens to correct the field curvature.

[0149] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface is convex. The shape is a crescent, which can receive and diverge the front light, so that the edge field light beam reaches the seventh lens with a higher height and a wider width, which is conducive to increasing the cone angle of the edge field light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field.

[0150] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface is concave. The shape is double concave, which can receive and diverge the front light, so that the edge field light beam reaches the seventh lens with a higher height and a wider width, which is conducive to increasing the cone angle of the edge field light beam when it reaches the imaging surface and reducing the incident angle of the main light, thereby improving the relative illumination of the edge field.

[0151] In this embodiment, the first side surface of the seventh lens is convex, and the second side surface is concave. The shape is a meniscus, which can make the light converge to the imaging surface, which is beneficial to reduce the rear working distance of the optical lens and achieve a smaller total optical length. At the same time, it can also increase the cone angle of the light beam reaching the imaging surface and improve the illumination of the imaging surface; the second side surface is concave, which is beneficial to smooth the light and improve the resolution.

[0152] In this embodiment, the first side surface of the seventh lens is convex, and the second side surface is convex. The double convex shape can make the light converge to the imaging surface more quickly, which is beneficial to reduce the rear working distance of the optical lens, achieve a smaller total length of the optical lens, and at the same time increase the cone angle of the light beam reaching the imaging surface, thereby improving the illumination of the imaging surface.

[0153] The present application adopts seven lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of large aperture, miniaturization, small CRA, low cost and high illumination.

[0154] In this embodiment, the second lens and the third lens are bonded to form a double bonded lens. The use of the double bonded lens can effectively correct chromatic aberration, reduce the total length of the optical lens, and allow the light to smoothly transition to the rear system, thereby optimizing the CRA, illumination, distortion and other performances of the optical system. The second lens has positive focal length, which is conducive to further converging the light converged by the first lens and achieving a large aperture. When matched with the negative focal length lens of the third lens, it is conducive to a smooth transition of the light to the rear end and improved resolution. The second lens is made of a material with a low refractive index and a large Abbe number, and the third lens is made of a material with a high refractive index and a small Abbe number. The bonding of the two material lenses can effectively correct the chromatic aberration of the optical system. At the same time, the second lens and the third lens are bonded together, which reduces the number of assembly parts between the two lenses, which is conducive to reducing the process and the overall weight, and reducing costs. It can also reduce the loss of light energy caused by reflection between lenses, improve the illumination of the image plane, and weaken ghost images. The focal lengths of the double-bonded lenses are similar, which is conducive to a smooth transition of light and improved image quality. Since the light transitions smoothly when passing through the bonding surface, the sensitivity to tolerances such as eccentricity and tilt between the two lenses is low, so the sensitivity to tolerances of the lenses during assembly can be reduced. The double-bonded lenses are conducive to a reasonable distribution of focal lengths, help to achieve thermal compensation, and improve the performance of optical lenses at different temperatures.

[0155] In this embodiment, the optical lens further includes an aperture, which is arranged between the third lens and the fourth lens. The first lens and the second lens are both positive in power, which is conducive to converging a wider light beam into the system, thereby achieving a larger aperture, while the third lens has a negative power, which is conducive to smoothing the light converging in front and eliminating aberrations at the same time; the light after passing through the third lens has a relatively stable trend, and the aberrations are effectively eliminated. Arranging an aperture here is conducive to achieving a large aperture, high resolution and lower tolerance sensitivity.

[0156] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the center of the imaging surface, and the whole group focal length value F of the optical lens satisfy: TTL / F≤1.5. By constraining this conditional expression, the ratio of the total optical length of the optical lens to the whole group focal length value of the optical lens is very small, which is conducive to reducing the length of the optical lens and achieving miniaturization under the same focal length. Preferably, TTL / F≤1.4.

[0157] In this embodiment, the air gap d5 between the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens set: d5 / F≤0.3. Satisfying this conditional expression is conducive to shortening the air gap between the third lens and the fourth lens, and is conducive to reducing the total length of the optical lens. Preferably, 0 <d5 / F≤0.25。

[0158] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the aperture D of the first side surface of the first lens satisfy: F / ENPD / D≤0.2. When this condition is met, when the front port diameter is constant, a larger aperture can be achieved, which is beneficial to increase the amount of light entering and improve the illumination of the imaging surface. Preferably, F / ENPD / D≤0.1.

[0159] In this embodiment, the actual image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.2. Satisfying this conditional expression makes the difference between the ideal image height and the actual image height smaller, and smaller distortion can be achieved. Preferably, |(HF*θ) / (F*θ)|≤0.08.

[0160] In this embodiment, the clear aperture D14 of the second side surface of the seventh lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D14 / H≤2. By constraining this conditional expression, the clear aperture of the second side surface of the seventh lens is close to the maximum image height, which is beneficial to reduce the incident angle of the main light on the imaging surface and improve the relative illumination of the edge field of view. Preferably, 0.8≤D14 / H≤1.5.

[0161] In this embodiment, the center thickness d3 of the second lens, the center thickness d4 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface, satisfy: (d3+d4) / TTL≥0.03. By constraining this conditional expression, appropriately increasing the center thickness of the double-cemented lens within a certain range is conducive to enhancing the ability to control light, and is conducive to controlling more light to enter the rear system and improving relative illumination. Preferably, (d3+d4) / TTL≥0.06.

[0162] In this embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.8. By constraining this conditional expression, the aperture of the optical lens is made larger, so that more light can reach the imaging surface, thereby improving the illumination at the imaging surface. Preferably, F / ENPD≤1.6.

[0163] In this embodiment, the maximum field of view FOV of the optical lens, the focal length value F of the entire set of the optical lens, and the actual image height H corresponding to the maximum field of view of the optical lens satisfy: FOV*F / H≥45. By constraining this conditional expression, under the condition of a fixed image height, the focal length is longer, which is conducive to achieving a large angular resolution. Preferably, FOV*F / H≥50. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0164] In this embodiment, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the light aperture D of the first side surface of the first lens satisfy: F*θ / D≥0.08. When this conditional expression is satisfied, when the focal length and field angle of the optical lens are fixed, the front port aperture is guaranteed to be smaller, which is conducive to the miniaturization of the optical lens. Preferably, F*θ / D≥0.15.

[0165] 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≤-0.1. By constraining this conditional expression, the focal length of the sixth lens is guaranteed to be negative, which is conducive to increasing the height of the edge field of view light beam at the seventh lens, reducing its main light incident angle at the imaging surface, and improving the relative illumination of the edge of the imaging surface. Preferably, -2≤F6 / F≤-0.3.

[0166] In this embodiment, the radius of curvature R3 of the first side surface of the second lens satisfies the value F of the entire group focal length of the optical lens: R3 / F≥0.08. The first side surface of the second lens is convex, which is conducive to quickly converging light, reducing the total length of the system, and is more conducive to converging a wider light beam into the lens, increasing the amount of light entering the lens, and thus improving the illumination of the image plane. Preferably, R3 / F≥0.15.

[0167] In this embodiment, the entire focal length value F of the optical lens and the actual image height H corresponding to the maximum field angle of the optical lens satisfy: F / H ≥ 1.1. Satisfying this conditional expression is conducive to improving the ratio of focal length to image height and achieving high angular resolution. Preferably, F / H ≥ 1.5.

[0168] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≤-0.1. The fourth lens adopts negative focal power, and the front lens can allocate more positive focal power, thereby converging a wider light beam into the aperture to achieve a large aperture; at the same time, the light converged in the front can be smoothly transitioned to improve the resolution. Preferably, F4 / F≤-0.2.

[0169] In this embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F≥0.1. The first lens adopts a positive focal length, which is conducive to converging a wider light beam into the optical lens, increasing the amount of light entering the optical lens, and thus improving the illumination of the imaging surface. Preferably, F1 / F≥0.3.

[0170] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≥0.05. The second lens adopts a positive focal length, which is conducive to converging a wider light beam into the lens, increasing the amount of light entering the lens, thereby increasing the illumination of the image plane, and is conducive to quickly converging light and reducing the total length of the system. Preferably, F2 / F≥0.15.

[0171] In this embodiment, the center thickness d11 of the sixth lens satisfies the total optical length of the optical lens, that is, the center distance TTL from the center of the first side surface of the first lens to the imaging surface: d11 / TTL≤0.07. Satisfying this conditional formula can make the ratio of the center thickness of the sixth lens to the total optical length of the optical lens smaller. When the total optical length is the same, the center thickness of the sixth lens is smaller, which is beneficial to increase the cone angle of the edge field of view light beam when it reaches the imaging surface and reduce the incident angle of the main light, thereby improving the relative illumination of the edge field of view. Preferably, d11 / TTL≤0.05.

[0172] Optionally, the optical lens may further include a color filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0173] The optical lens in the present application may use multiple lenses, such as the seven lenses mentioned above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. The characteristics of aspherical lenses are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with a constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberrations and improving astigmatism aberrations. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0174] In an exemplary embodiment, the present solution does not limit the plastic and glass of the lens. If the focus is on temperature performance, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can 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 the stability of the system. At the same time, the use of glass material can avoid the lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the optical lens. For example, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the seventh lens can all be glass aspherical lenses. Of course, in applications where temperature stability requirements are low, the first lens to the seventh lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the seventh lens in the optical lens can also be made of a combination of plastic and glass.

[0175] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element that converts 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.

[0176] 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.

[0177] 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.

[0178] It should be noted that any one of the following examples 1 to 12 is applicable to all embodiments of the present application.

[0179] Example 1

[0180] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0181] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0182] 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0183] In this example, the total effective focal length F of the optical lens is 38.457 mm, the maximum field of view FOV of the optical lens is 16.600°, and the total length TTL of the optical lens is 46.048 mm.

[0184] Table 1 shows a basic structural parameter table of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0185] Surf Radius Thickness Nd Vd 1 29.567 6.747 1.91 35.25 2 199.587 2.945 3 19.831 4.709 1.69 54.54 4 75.817 1.454 1.92 18.90 5 20.341 3.095 STO Infinity 1.489 7 -33.180 0.670 1.50 66.02 8 14.013 2.759 9 17.349 6.233 1.59 68.34 10 -27.983 6.752 11 -12.388 0.681 1.62 56.71 12 -85.230 0.100 13 21.295 2.790 1.81 22.70 14 137.586 2.616 15 Infinity 0.800 1.52 64.20 16 Infinity 2.209 IMA / /

[0186] Table 1

[0187] Example 2

[0188] like Figure 2 , which is a schematic diagram of the optical lens structure of Example 2.

[0189] like Figure 2 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0190] 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0191] In this example, the total effective focal length F of the optical lens is 38.276 mm, the maximum field of view FOV of the optical lens is 16.600°, and the total length TTL of the optical lens is 45.924 mm.

[0192] Table 2 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0193] Surf Radius Thickness Nd Vd 1 29.629 6.782 1.91 35.25 2 194.826 2.888 3 19.559 5.177 1.69 54.54 4 84.888 1.445 1.92 18.90 5 20.469 3.077 STO Infinity 1.478 7 -32.825 0.816 1.50 66.02 8 14.281 3.903 9 17.209 5.874 1.59 68.34 10 -26.726 6.753 11 -12.233 0.680 1.62 56.71 12 -112.121 0.529 13 22.255 2.551 1.81 22.70 14 121.777 2.658 15 Infinity 0.800 1.52 64.20 16 Infinity 0.513 IMA / /

[0194] Table 2

[0195] Example 3

[0196] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0197] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0198] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0199] In this example, the total effective focal length F of the optical lens is 30.724 mm, the maximum field of view FOV of the optical lens is 20.000°, and the total length TTL of the optical lens is 36.022 mm.

[0200] Table 3 shows the basic structural parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0201] Surf Radius Thickness Nd Vd 1 21.860 6.180 1.91 35.25 2 137.567 0.388 3 12.189 6.390 1.69 54.54 4 -200.000 1.394 1.92 18.90 5 7.396 2.540 STO Infinity 1.139 7 -14.761 0.692 1.50 66.02 8 21.892 0.534 9 12.638 4.581 1.59 68.34 10 -18.901 4.172 11 -8.936 0.677 1.62 56.71 12 -19.667 0.127 13 14.631 3.129 1.81 22.70 14 177.861 2.609 15 Infinity 0.800 1.52 64.20 16 Infinity 0.670 IMA / /

[0202] Table 3

[0203] Example 4

[0204] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0205] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0206] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0207] In this example, the total effective focal length F of the optical lens is 30.778 mm, the maximum field of view FOV of the optical lens is 20.000°, and the total length TTL of the optical lens is 35.983 mm.

[0208] Table 4 shows the basic structural parameter table of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0209] Surf Radius Thickness Nd Vd 1 21.860 6.181 1.91 35.25 2 137.615 0.389 3 12.189 6.390 1.69 54.54 4 -185.427 1.394 1.92 18.90 5 7.395 2.548 STO Infinity 1.143 7 -14.753 0.693 1.50 66.02 8 21.884 0.497 9 12.645 4.568 1.59 68.34 10 -18.937 4.165 11 -8.931 0.686 1.62 56.71 12 -19.658 0.116 13 14.631 3.135 1.81 22.70 14 175.258 2.610 15 Infinity 0.800 1.52 64.20 16 Infinity 0.670 IMA / /

[0210] Table 4

[0211] Example 5

[0212] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0213] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0214] 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0215] In this example, the total effective focal length F of the optical lens is 35.541 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 42.929 mm.

[0216] Table 5 shows the basic structural parameter table of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0217] Surf Radius Thickness Nd Vd 1 24.144 5.583 1.91 35.25 2 200.121 0.100 3 16.175 4.886 1.69 54.54 4 96.2014 1.680 1.92 18.90 5 13.154 2.371 STO Infinity 1.187 7 -25.552 0.842 1.50 66.02 8 13.541 2.640 9 17.164 5.684 1.59 68.34 10 -22.228 5.876 11 -13.205 0.987 1.62 56.71 12 -226.118 0.155 13 21.297 5.384 1.81 22.70 14 -203.765 2.969 15 Infinity 0.800 1.52 64.20 16 Infinity 1.127 IMA / /

[0218] Table 5

[0219] Example 6

[0220] like Figure 6 Shown is a schematic diagram of the optical lens structure of Example 6.

[0221] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0222] 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive power, the first side surface S13 of the seventh lens is convex, and the second side surface S14 of the seventh lens is convex. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0223] In this example, the total effective focal length F of the optical lens is 35.041 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 41.259 mm.

[0224] Table 6 shows the basic structural parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0225] Surf Radius Thickness Nd Vd 1 23.245 5.758 1.91 35.25 2 148.530 0.089 3 15.841 4.752 1.69 54.54 4 83.845 1.781 1.92 18.90 5 13.113 2.379 STO Infinity 1.157 7 -25.398 0.844 1.50 66.02 8 14.864 1.423 9 17.195 5.187 1.59 68.34 10 -26.317 5.796 11 -12.434 1.787 1.62 56.71 12 -358.135 0.100 13 19.162 5.436 1.81 22.70 14 -176.729 3.258 15 Infinity 0.800 1.52 64.20 16 Infinity 0.714 IMA / /

[0226] Table 6

[0227] Example 7

[0228] like Figure 7 The figure shows the schematic diagram of the optical lens structure of Example 7.

[0229] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0230] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is concave, 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 convex, and the second side surface S14 of the seventh lens is concave. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0231] In this example, the total effective focal length F of the optical lens is 35.100 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.063 mm.

[0232] Table 7 shows the basic structural parameter table of the optical lens of Example 7, wherein the units of the radius of curvature Radius and the thickness / distance are both millimeters (mm).

[0233] Surf Radius Thickness Nd Vd 1 23.555 6.281 1.91 35.25 2 187.769 0.706 3 19.351 6.252 1.69 54.54 4 -58.312 1.266 1.92 18.90 5 16.881 1.919 STO Infinity 0.849 7 -44.131 0.702 1.50 66.02 8 12.254 4.551 9 16.200 7.750 1.59 68.34 10 -23.810 4.052 11 -16.420 0.749 1.62 56.71 12 151.313 0.908 13 18.614 4.263 1.81 22.70 14 65.683 2.800 15 Infinity 0.800 1.52 64.20 16 Infinity 0.216 IMA / /

[0234] Table 7

[0235] Example 8

[0236] like Figure 8 Shown is a schematic diagram of the optical lens structure of Example 8.

[0237] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0238] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is concave, 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 convex, and the second side surface S14 of the seventh lens is concave. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0239] In this example, the total effective focal length F of the optical lens is 34.910 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 43.092 mm.

[0240] Table 8 shows the basic structural parameter table of the optical lens of Example 8, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0241] Surf Radius Thickness Nd Vd 1 23.020 6.222 1.91 35.25 2 180.538 0.650 3 19.850 6.219 1.69 54.54 4 -53.006 1.230 1.92 18.90 5 17.689 1.872 STO Infinity 0.810 7 -42.843 0.638 1.50 66.02 8 13.158 4.490 9 18.880 6.780 1.59 68.34 10 -23.709 3.982 11 -16.687 0.674 1.62 56.71 12 172.054 0.851 13 18.441 4.118 1.81 22.70 14 70.393 2.950 15 Infinity 0.800 1.52 64.20 16 Infinity 0.807 IMA / /

[0242] Table 8

[0243] Example 9

[0244] like Fig. 9 The figure shows a schematic diagram of the optical lens structure of Example 9.

[0245] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0246] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is concave, 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 convex, and the second side surface S14 of the seventh lens is convex. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0247] In this example, the total effective focal length F of the optical lens is 36.735 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 42.715 mm.

[0248] Table 9 shows the basic structural parameter table of the optical lens of Example 9, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0249] Surf Radius Thickness Nd Vd 1 23.306 6.292 1.91 35.25 2 215.354 1.008 3 18.020 6.516 1.69 54.54 4 -43.736 0.729 1.92 18.90 5 15.000 1.968 STO Infinity 0.874 7 -33.376 0.643 1.50 66.02 8 13.057 2.837 9 16.152 7.604 1.59 68.34 10 -21.835 4.857 11 -11.521 0.677 1.62 56.71 12 173.084 0.100 13 22.544 4.266 1.81 22.70 14 -200.003 2.894 15 Infinity 0.800 1.52 64.20 16 Infinity 0.650 IMA / /

[0250] Table 9

[0251] Example 10

[0252] like Fig.10 The figure shows a schematic diagram of the optical lens structure of Example 10.

[0253] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0254] 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 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 negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative power, the first side surface S11 of the sixth lens is concave, 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 convex, and the second side surface S14 of the seventh lens is convex. The light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0255] In this example, the total effective focal length F of the optical lens is 34.619 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 42.857 mm.

[0256] Table 10 shows the basic structural parameter table of the optical lens of Example 10, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0257] Surf Radius Thickness Nd Vd 1 24.064 6.751 1.91 35.25 2 187.577 0.569 3 18.934 6.325 1.69 54.54 4 -47.956 0.703 1.92 18.90 5 17.298 1.975 STO Infinity 1.104 7 -42.561 1.453 1.50 66.02 8 13.440 2.518 9 16.915 6.452 1.59 68.34 10 -25.034 4.940 11 -13.421 0.831 1.62 56.71 12 56.606 0.230 13 17.844 4.829 1.81 22.70 14 -158.089 2.730 15 Infinity 0.800 1.52 64.20 16 Infinity 0.650 IMA / /

[0258] Table 10

[0259] Example 11

[0260] like Fig.11 The figure shows a schematic diagram of the optical lens structure of Example 11.

[0261] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0262] The first lens L1 has 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0263] In this example, the total effective focal length F of the optical lens is 37.865 mm, the maximum field of view FOV of the optical lens is 16.600°, and the total length TTL of the optical lens is 45.783 mm.

[0264] Table 11 shows the basic structural parameter table of the optical lens of Example 11, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0265] Surf Radius Thickness Nd Vd 1 45.635 5.812 1.91 35.25 2 -496.078 0.100 3 17.884 5.497 1.69 54.54 4 31.040 1.445 1.92 18.90 5 19.109 3.426 STO Infinity 2.533 7 -40.189 0.700 1.50 66.02 8 20.265 5.097 9 22.830 4.966 1.59 68.34 10 -34.473 9.329 11 -12.169 0.700 1.62 56.71 12 -47.664 0.100 13 28.677 2.392 1.81 22.70 14 189.755 2.598 15 Infinity 0.800 1.52 64.20 16 Infinity 0.289 IMA / /

[0266] Table 11

[0267] Example 12

[0268] like Fig.12 , which is a schematic diagram of the optical lens structure of Example 12.

[0269] 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, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0270] 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 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 negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 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 convex. The sixth lens L6 has negative 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 positive 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 light from the first side passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a cemented lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0271] In this example, the total effective focal length F of the optical lens is 37.309 mm, the maximum field of view FOV of the optical lens is 16.600°, and the total length TTL of the optical lens is 44.897 mm.

[0272] Table 12 shows the basic structural parameter table of the optical lens of Example 12, wherein the units of the radius of curvature Radius and the thickness / distance are both millimeters (mm).

[0273] Surf Radius Thickness Nd Vd 1 45.444 5.934 1.91 35.25 2 -494.554 0.100 3 17.937 5.500 1.69 54.54 4 31.007 1.440 1.92 18.90 5 19.036 3.338 STO Infinity 2.409 7 -45.655 0.700 1.50 66.02 8 19.761 4.933 9 22.634 4.989 1.59 68.34 10 -34.185 9.302 11 -12.126 0.700 1.62 56.71 12 -38.653 0.100 13 31.764 2.261 1.81 22.70 14 140.456 2.300 15 Infinity 0.800 1.52 64.20 16 Infinity 0.091 IMA / /

[0274] Table 12

[0275] In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 13.

[0276]

[0277]

[0278] Table 13

[0279] Table 14 gives the effective focal length F of the optical lenses of Examples 1 to 12, the effective focal length F1, F2, F4, F6, etc. of each lens, (unit: mm).

[0280]

[0281]

[0282] Table 14

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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 positive optical power, wherein a first side surface of the first lens is a convex surface; a second lens having positive optical power, wherein the first side surface of the second lens is a convex surface; a third lens having negative optical power, wherein the second side surface of the third lens is a concave surface; a fourth lens having negative optical power, wherein the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a concave surface; a fifth lens having positive optical power, wherein the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex; a sixth lens having negative optical power, wherein the first side surface of the sixth lens is a concave surface; A seventh lens element having positive optical power, wherein the first side surface of the seventh lens element is a convex surface.

2. The optical lens according to claim 1, characterized in that: The second side surface of the first lens is a concave surface.

3. The optical lens according to claim 1, characterized in that: The second side surface of the first lens is a convex surface.

4. The optical lens according to claim 1, characterized in that: The second side surface of the second lens is a concave surface.

5. The optical lens according to claim 1, characterized in that: The second side surface of the second lens is a convex surface.

6. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a convex surface.

7. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a concave surface.

8. The optical lens according to claim 1, characterized in that: The second side surface of the sixth lens is a convex surface.

9. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having positive optical power; a second lens having positive optical power; a third lens having negative optical power; a fourth lens having negative optical power; a fifth lens having positive refractive power; a sixth lens having negative optical power; a seventh lens having positive refractive power; The curvature radius R11 of the first side surface of the sixth lens satisfies the following relationship with the entire focal length F of the optical lens: R11 / F≤-0.

05.

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