Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side along an optical axis: a first lens with negative optical power; a second lens with negative optical power, a first side of the second lens being a concave surface; a third lens with positive optical power, a second side of the third lens being a convex surface; a fourth lens with negative optical power; a fifth lens with positive optical power, a first side of the fifth lens being a convex surface; a sixth lens with optical power, a first side of the sixth lens being a convex surface and a second side of the sixth lens being a concave surface; and a seventh lens with optical power, a first side of the seventh lens being a convex surface and a second side of the seventh lens being a concave surface. The number of lenses with optical power of the optical lens is seven. The optical lens satisfies: 0.08<=T23 / TTL<=0.2, 0.24<=(R14+R13) / TTL<=0.65 and 0.05<=BFL / TTL<=0.25.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0002] Automotive cameras are key components for autonomous driving assistance systems to acquire external information. With the rapid development of autonomous driving assistance systems, the demand for automotive cameras is also increasing. To meet the requirements of safe driving and due to their special installation locations, automotive cameras in autonomous driving assistance systems have more specific requirements compared to ordinary optical lenses.

[0003] Existing automotive lenses have at least the following problems: 1) Most have a large aperture number (FNO) and a small amount of light intake; 2) The resolution is not high and cannot meet the requirements of small FNO and high resolution at the same time; 3) They cannot meet the requirements of miniaturization and high resolution at the same time.

[0004] With the increasing demand for perception of the surrounding environment of driving vehicles, and in order to achieve higher radar detection capabilities for vehicle lenses, vehicle lenses are currently developing towards higher resolution, higher light throughput, smaller FNO, and miniaturization. Summary of the Invention

[0005] One aspect of this application provides an optical lens, which comprises, from a first side to a second side along the optical axis: a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, a sixth lens with optical power, and a seventh lens with optical power, wherein the optical lens has seven lenses with optical power; the first side of the second lens is concave; the second side of the third lens is convex; the first side of the fifth lens is convex; the first side of the sixth lens is convex and the second side is concave; the seventh lens has a first side of concave and a second side of convex; the second side of the seventh lens has a second side of concave; the third side of the second lens has a third side of concave; the fourth side of the fifth lens is convex; the fifth lens has a sixth side of concave and a seventh side of convex; the sixth lens has a seventh side of concave; the seventh lens has a seventh side of concave and a seventh side of concave; the second side of the third lens has a third side of concave; the third side of the second lens has a third side of concave; the fourth side of the fifth lens has a third side of concave; the fifth lens has a sixth side of concave; the sixth lens has a seventh side of concave; the seventh lens has a seventh side of concave and a seventh side of concave; the second side of the third lens has a third side of concave; the third side of the second lens has a third side of concave; the fourth side of the third lens has a third side of concave; the fifth lens has a sixth side of concave; the sixth lens has a seventh side of concave and a seventh ... One side is convex, and the second side is concave; the optical lens satisfies: 0.08≤T23 / TTL≤0.2, 0.24≤(R14+R13) / TTL≤0.65 and 0.05≤BFL / TTL≤0.25, where TTL is the distance on the optical axis from the first side of the first lens to the imaging plane of the optical lens, BFL is the distance on the optical axis from the second side of the seventh lens to the imaging plane of the optical lens, T23 is the distance between the second and third lenses on the optical axis, R13 is the radius of curvature of the first side of the seventh lens, and R14 is the radius of curvature of the second side of the seventh lens.

[0006] According to an exemplary embodiment of this application, the sixth lens has positive or negative optical power; the seventh lens has positive or negative optical power.

[0007] According to exemplary embodiments of this application, the first lens has a first concave side surface and a second convex or concave side surface; or, the first lens has a first convex side surface and a second concave side surface. The second lens has a second convex or concave side surface. The third lens has a first convex or concave side surface. The fourth lens has a first concave side surface and a second convex or concave side surface; or, the fourth lens has a first convex side surface and a second concave side surface. The fifth lens has a second concave or convex side surface.

[0008] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following: 0.15 ≤ TTL / H / FOV × 1° ≤ 0.35; 0.24 ≤ (F × θ) / D ≤ 0.45; 0.04 ≤ D / H / FOV × 1° ≤ 0.14; 0.12mm -1 ≤D / H / F≤0.25mm -1 0.01mm -1 ≤F / ENPD / D≤0.06mm -1 Wherein, FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

[0009] According to an exemplary embodiment of this application, the optical lens satisfies: 55°≤(FOV×F) / H≤63°, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0010] According to an exemplary embodiment of this application, the optical lens satisfies: 3≤TTL / F≤6.5, where F is the total effective focal length of the optical lens.

[0011] According to an exemplary embodiment of this application, the optical lens satisfies: 1.1≤F / H≤2.4, where F is the total effective focal length of the optical lens and H is the image height corresponding to the maximum field of view of the optical lens.

[0012] According to an exemplary embodiment of this application, the optical lens satisfies: |F6 / F|≥1.6, where F is the total effective focal length of the optical lens and F6 is the effective focal length of the sixth lens.

[0013] According to an exemplary embodiment of this application, the optical lens satisfies: 1° / mm≤FOV / F≤4.5° / mm, where FOV is the maximum field of view of the optical lens and F is the total effective focal length of the optical lens.

[0014] According to an exemplary embodiment of this application, the optical lens satisfies: 1.4≤T23 / T12≤14.5, where T12 is the distance between the first lens and the second lens on the optical axis.

[0015] According to an exemplary embodiment of this application, the optical lens satisfies: -0.92≤(1 / F1+1 / F2) / (1 / F)<0, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens.

[0016] According to an exemplary embodiment of this application, the optical lens satisfies: F4 / F≤-2, where F is the total effective focal length of the optical lens and F4 is the effective focal length of the fourth lens.

[0017] According to an exemplary embodiment of this application, the optical lens satisfies: 0 < R9 / R12 ≤ 3, where R9 is the radius of curvature of the first side surface of the fifth lens and R12 is the radius of curvature of the second side surface of the sixth lens.

[0018] According to an exemplary embodiment of this application, the optical lens satisfies: (F1+F2+F4) / 3F≤-5, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F4 is the effective focal length of the fourth lens.

[0019] According to an exemplary embodiment of this application, the optical lens satisfies: 0 < T56 / R11 ≤ 0.6, where T56 is the distance between the fifth lens and the sixth lens on the optical axis, and R11 is the radius of curvature of the first side surface of the sixth lens.

[0020] According to an exemplary embodiment of this application, the optical lens satisfies: |R12 / F6|≤1.6, where R12 is the radius of curvature of the second side surface of the sixth lens, and F6 is the effective focal length of the sixth lens.

[0021] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following: 0.7≤F / ENPD≤1.5; 0.85≤(H / 2) / (F×tan(θ / 2))≤1.05; 0.1≤R14 / TTL≤0.5; 1.6≤F3 / F≤15; 1.2≤F5 / F≤6.2; -8≤R3 / F≤-0.5; 1.8≤|F6 / F|≤17; 0.1≤T56 / R11≤0.4; 1≤F7 / F or F7 / F≤-10; wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F3 is the effective focal length of the third lens, F5 is the effective focal length of the fifth lens, R3 is the radius of curvature of the first side of the second lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, T56 is the distance between the fifth and sixth lenses on the optical axis, and R11 is the radius of curvature of the first side of the sixth lens.

[0022] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following: 57°≤(FOV×F) / H≤61°; 3.8≤TTL / F≤6.3; 0.19≤TTL / H / FOV×1°≤0.3; 0.28≤(F×θ) / D≤0.41; 0.06≤D / H / FOV×1°≤0.12; 0.14mm -1 ≤D / H / F≤0.22mm -1 ;0.07≤BFL / TTL≤0.21;1.3≤F / H≤2.1;0.7≤F / ENPD≤1.1;0.015mm -1 ≤F / ENPD / D≤0.045mm -1;0.89≤(H / 2) / (F×tan(θ / 2))≤1; 0.1≤T23 / TTL≤0.17; 2.2≤|F6 / F|≤12; 0.3≤(R14+R13) / TTL≤0.55 ;0.15≤R14 / TTL≤0.4; 1.4° / mm≤FOV / F≤3.5° / mm; 1.6≤T23 / T12≤10; -0.74≤(1 / F1+1 / F2) / (1 / F)≤- 0.19; 2.1≤F3 / F≤13.1; -17.2≤F4 / F≤-2.6; 1.6≤F5 / F≤4.7; 0.2≤R9 / R12≤2.1; -12≤(F1+F2+F4) / 3F≤-6.5; -5.7≤R3 / F≤-1; 0.02≤T56 / R11≤0.4; 0.06≤|R12 / F6|≤1.1; 1.5≤F7 / F≤12 or F7 / F≤-16; where F OV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, T12 is the distance between the first and second lenses on the optical axis, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R9 is the radius of curvature of the first side of the fifth lens, R12 is the radius of curvature of the second side of the sixth lens, R3 is the radius of curvature of the first side of the second lens, T56 is the distance between the fifth and sixth lenses on the optical axis, R11 is the radius of curvature of the first side of the sixth lens, and F7 is the effective focal length of the seventh lens.

[0023] Another aspect of this application provides an electronic device. The electronic device includes an optical lens according to this application, and at least one of an imaging element and a light source, wherein the imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto a target area after passing through the optical lens to form an image or illuminate the area.

[0024] The optical lens provided in this application employs seven lenses. By controlling the ratio of the distance between the second and third lenses on the optical axis to the total optical length of the optical lens, the light passing through the first and second lenses is smoothly diffused to the rear lens group, increasing the light transmission of the optical system. This facilitates achieving a small FNO (field-to-noise ratio) for the optical system, while the relatively smooth light path improves the lens's resolving power. Simultaneously, by controlling the ratio of the sum of the curvature radii of the first and second sides of the seventh lens to the total optical length of the optical lens, the seventh lens, being convex-concave in shape with relatively small and similar curvature radii on both sides, facilitates a smooth transition of light to the imaging plane, correcting aberrations and improving resolving power. Furthermore, this ensures a moderate total optical length, contributing to lens miniaturization. Finally, by controlling the ratio of the distance from the second side of the seventh lens to the imaging plane on the optical axis to the total optical length of the optical lens, the back focal length of the optical lens can be reasonably controlled, providing space for optical element installation and focusing, avoiding mechanical interference, and further achieving lens miniaturization. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0027] Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0028] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0029] Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown;

[0030] Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown;

[0031] Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown;

[0032] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown;

[0033] Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown;

[0034] Figure 9A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown;

[0035] Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown;

[0036] Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown;

[0037] Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown;

[0038] Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown;

[0039] Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown;

[0040] Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown;

[0041] Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this application is shown;

[0042] Figure 17 The MTF (Modulation Transfer Function) curve of the optical lens according to Embodiment 1 of this application is shown;

[0043] Figure 18 The MTF curve of the optical lens according to Embodiment 3 of this application is shown;

[0044] Figure 19 The MTF curve of the optical lens according to Embodiment 8 of this application is shown;

[0045] Figure 20 The MTF curve of the optical lens according to Embodiment 9 of this application is shown;

[0046] Figure 21 The MTF curve of the optical lens according to Embodiment 15 of this application is shown;

[0047] Figure 22 The MTF curve of the optical lens according to Embodiment 16 of this application is shown. Detailed Implementation

[0048] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0050] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0051] It should be understood that the optical lens provided in this application can be used for photography, projection, and LiDAR lenses. When the optical lens provided in this application is used as a camera lens or a LiDAR receiver lens, the term "first side" as used herein refers to the object side, and "second side" refers to the image side. Light from the object side can, for example, form an image on the image side. The camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. When the optical lens provided in this application is used as a projection lens or a radar transmitter lens, the term "first side" as used herein refers to the object side, and "second side" refers to the light source side. The second side of the optical lens can be provided with a light source, which can provide light with or without image information. The light from the light source side is projected onto the first side after passing through the optical lens, for example, forming an image or illuminating an area on the first side.

[0052] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. For example, when the optical lens provided in this application is used for imaging, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging side is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0053] It should also be understood that the terms "comprising" and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0054] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] In an exemplary embodiment, the optical lens may include seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the first side to the second side.

[0057] In an exemplary embodiment, the first lens has negative optical power. The first side of the first lens is concave, and the second side is convex. The negative optical power of the first lens diverges light passing through it. Under the same field of view, light emitted from the second side of the first lens allows the rear optical system to have a larger light-receiving surface. The concave first side of the first lens allows the collected light to enter the rear optical system in a divergent manner as much as possible, while effectively reducing the angle between the incident edge light and the first side, improving the overall edge relative illumination of the lens. It also prevents the first side of the first lens from contacting and rubbing against other components, which is beneficial for the protection of the first lens and its coating. The convex second side of the first lens allows light to enter the rear optical system as smoothly as possible, which helps reduce the tolerance sensitivity of the lens and achieve a small front-end aperture.

[0058] In an exemplary embodiment, the first lens has negative optical power. The first side of the first lens is convex, and the second side is concave. The negative optical power of the first lens facilitates the reception and appropriate diffusion of light, resulting in a smooth transition of light paths. The first lens is meniscus-shaped and convex towards the first side, which corrects aberrations and helps reduce the aperture of the rear lens. The convex first side of the first lens maximizes the collection of light from various fields of view into the rear optical system, and in practical environments such as rain or snow, it facilitates the sliding of water droplets, reducing their impact on lens imaging.

[0059] In an exemplary embodiment, the first lens has negative optical power. The first side of the first lens is concave, and the second side is also concave. The negative optical power of the first lens diverges light rays passing through it. Under the same field of view, light rays exiting from the second side of the first lens can provide a larger light-receiving surface for the rear optical system. The first lens has a biconcave shape, which can diffuse the forward light rays twice and adjust the light path, ensuring a smooth light transition. This helps to achieve high light transmission and a small FNO while reducing tolerance sensitivity and improving resolution.

[0060] In an exemplary embodiment, the second lens has negative optical power. The first side of the second lens is concave, and the second side is convex. The second lens, with its negative optical power and meniscus shape, receives light rays passing through the first lens and further diffuses them. Together with the first lens, it achieves a smooth divergence of light rays, which is beneficial for improving the lens's resolving power. The concave first side of the second lens diverges light rays and effectively receives light rays diverged from the second side of the first lens, allowing for smooth light emission and improving the lens's field curvature and off-axis aberrations. The convex second side reduces the incident height of edge field rays, thereby reducing the rear aperture of the lens and contributing to lens miniaturization.

[0061] In an exemplary embodiment, the second lens has negative optical power. The first side surface of the second lens is concave, and the second side surface is also concave. The second lens, having negative optical power, receives and further diffuses light passing through the first lens, effectively dispersing the central and peripheral rays in each field of view, expanding the transmission aperture of the rear light, and increasing the lens's illumination. Furthermore, the biconcave structure of the second lens better disperses light, which is beneficial for correcting aberrations between peripheral and central rays, thereby achieving high resolution. Simultaneously, the biconcave shape of the second lens can alter the trajectory of peripheral rays, reducing the front aperture of the lens and thus decreasing its size, which is beneficial for lens miniaturization and cost reduction.

[0062] In an exemplary embodiment, the third lens has positive optical power. The first side of the third lens is convex, and the second side is convex. The third lens has positive optical power, and the shape of the third lens is biconvex, so that both sides can converge the light in front and adjust the light path; the second side is convex, which reduces the resolving pressure of the first side designed as a convex surface, and prevents the edge field of view beam from being steep due to the first side being too curved, which is beneficial to improving the resolving power of the lens.

[0063] In an exemplary embodiment, the third lens has positive optical power. The first side of the third lens is concave, and the second side is convex. The positive optical power of the third lens allows it to converge incident light rays, facilitating the entry of more light into the optical system, increasing light transmission, and converging diverging light rays, thus improving the lens's image quality. The concave first side of the third lens further converges forward light rays, thereby further increasing the system's light transmission and contributing to a small FNO (field-of-flight) resolution. The convex second side of the third lens converges diffused light rays and adjusts their trajectory, making it slightly smoother, which helps correct aberrations at the edges of the field of view and achieves high resolution.

[0064] In an exemplary embodiment, the fourth lens has negative optical power. The first side of the fourth lens is concave, and the second side is convex. The fourth lens has negative optical power, and its concave first side further diffuses the forward light, gradually increasing the beam diameter and thus further increasing the system's light transmission, which is beneficial for achieving a small FNO (field-of-flight) resolution. The convex second side of the fourth lens can adjust the increasingly diffused light path, making it slightly smoother, which is beneficial for correcting aberrations at the edges of the field of view and achieving high resolution of the lens.

[0065] In an exemplary embodiment, the fourth lens has negative optical power. The first side of the fourth lens is convex, and the second side is concave. The fourth lens has negative optical power, and its first side is convex, which allows for slight convergence adjustment of the light beam emitted from the third lens. In this case, the fourth lens can not only adjust the light path but also control the aperture of the rear lens to a certain extent, thereby achieving cost reduction. The second side of the fourth lens is concave, which further diffuses the light, contributing to high light transmission and a small FNO (no focal length).

[0066] In an exemplary embodiment, the fourth lens has negative optical power. The first side of the fourth lens is concave, and the second side is concave. The fourth lens has negative optical power, and both sides are concave, which can appropriately diffuse the light beam emitted from the third lens, increasing the beam diameter and thus increasing the light transmission of the lens, achieving a small FNO (Flight Noise).

[0067] In an exemplary embodiment, the fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is concave. The positive optical power of the fifth lens, combined with the negative optical power of the fourth lens in front, enables convergence and resolution, which is beneficial for lens miniaturization. Furthermore, the convex orientation of the first side of the fifth lens further converges the forward beam; the concave orientation of the fifth lens softens the rapidly converging beam, resulting in a smoother beam path at the edges of the field of view, which is beneficial for correcting edge field-of-view aberrations.

[0068] In an exemplary embodiment, the fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is convex. The fifth lens has positive optical power, which compensates for the negative optical power of the fourth lens in front, enabling convergence and resolution, thus facilitating lens miniaturization. The fifth lens is biconvex, allowing both sides to converge forward light and adjust the light path, which helps reduce the rear aperture and shorten the overall optical length of the lens, further contributing to miniaturization and cost reduction. The second side of the fifth lens is convex, alleviating the resolving pressure on the first side, which is designed as a convex surface, and preventing excessive curvature of the first side from causing steep edge field-of-view beam paths, thus improving the lens's resolving power.

[0069] In an exemplary embodiment, the sixth lens has positive optical power. The first side of the sixth lens is convex, and the second side is concave. The positive optical power of the sixth lens enables divergent light rays to converge smoothly into the rear optical system, which is beneficial for correcting system aberrations. The shape of the sixth lens is meniscus and convex towards the first side, which can collect as much wide-field light as possible into the rear optical system and fix the direction of large-angle light rays at the edges.

[0070] In an exemplary embodiment, the sixth lens has negative optical power. The first side of the sixth lens is convex, and the second side is concave. The sixth lens has negative optical power, and its convex first side can converge light rays, causing them to bend towards the center, thus improving the imaging quality of the lens's central field of view. Its concave second side can further correct system aberrations, improve image quality, and optimize optical performance such as distortion and CRA (Chief Ray Angle).

[0071] In an exemplary embodiment, the seventh lens has positive optical power. The first side of the seventh lens is convex, and the second side is concave. The positive optical power of the seventh lens facilitates rapid light convergence, reducing the back focal length to some extent and thus reducing the overall system length. The convex first side of the seventh lens can converge and focus the light emitted from the sixth lens, transmitting it to the second side for final resolution, which is beneficial for lens miniaturization. The concave second side of the seventh lens can smooth out the final trajectory of the forward beam, allowing the light to transition smoothly to the imaging plane, avoiding abrupt changes, which helps reduce the lens's tolerance sensitivity and thus improves the lens's resolving power.

[0072] In an exemplary embodiment, the seventh lens has negative optical power. The first side of the seventh lens is convex, and the second side is concave. The negative optical power of the seventh lens can appropriately diverge the light from the front optical system, balancing the resolving power of each field of view and facilitating low distortion. The crescent shape of the seventh lens (approaching a concentric circle) allows large-aperture light from the front end to smoothly enter the chip surface, improving the lens's resolving power. The convex and concave shapes of the seventh lens, in conjunction with those of the sixth lens, allow light to converge smoothly to the imaging plane, balancing the resolving power of each field of view and further improving the lens's imaging quality.

[0073] In an exemplary embodiment, the seventh lens is an aspherical lens. By reasonably setting the curvature radii of its two sides, the aberrations caused by the front lens can be effectively corrected, thereby further improving the resolution quality of the lens. Moreover, the aspherical lens has different curvatures at different positions, which can adjust the light path to converge on the imaging surface, thereby better correcting aberrations and improving resolution.

[0074] In an exemplary embodiment, the optical lens satisfies: 0.08 ≤ T23 / TTL ≤ 0.2, where TTL is the distance on the optical axis from the first side of the first lens to the imaging plane of the optical lens, and T23 is the distance between the second and third lenses on the optical axis. Both the first and second lenses have negative optical power. By controlling the distance between the second and third lenses on the optical axis, the light passing through the first and second lenses is smoothly diffused to the rear lens group, increasing the light transmission of the optical system and helping to reduce FNO. Simultaneously, the smooth light path helps to improve the lens's resolution. More specifically, the optical lens satisfies: 0.1 ≤ T23 / TTL ≤ 0.17, which is more conducive to achieving high light transmission and high resolution.

[0075] In an exemplary embodiment, the optical lens satisfies: 0.24 ≤ (R14 + R13) / TTL ≤ 0.65, where TTL is the distance on the optical axis from the first side of the first lens to the imaging plane of the optical lens, R13 is the radius of curvature of the first side of the seventh lens, and R14 is the radius of curvature of the second side of the seventh lens. Firstly, the seventh lens has a convex-concave shape with relatively small and similar radii of curvature on both sides, which facilitates a smooth transition of light to the imaging plane, corrects aberrations, and improves resolution. Simultaneously, it ensures a moderate TTL, which is beneficial for lens miniaturization. More specifically, the optical lens satisfies: 0.3 ≤ (R14 + R13) / TTL ≤ 0.55, which is even more conducive to achieving high resolution and miniaturization of the lens.

[0076] Furthermore, 0.24 ≤ (R14 + R13) / TTL ≤ 0.65 can be combined with |F6 / F| ≥ 1.6, allowing the sixth and seventh lenses to adjust the light path before imaging, which is more conducive to achieving high resolution. Even further, if the optical lens can satisfy at least one of the following conditions: 0.3 ≤ (R14 + R13) / TTL ≤ 0.55 and 2.2 ≤ |F6 / F| ≤ 12, the high resolution performance of the optical lens will be even better.

[0077] In an exemplary embodiment, the seventh lens is crescent-shaped with relatively similar radii of curvature on both sides, allowing it to have a larger effective focal length. This enables the light to be smoothly redirected to the imaging plane, resulting in high resolution. It also prevents rapid deflection of the outgoing beam and avoids steep light paths, thus giving the optical lens better resolution. Furthermore, when the seventh lens is a convex-concave aspherical lens, the radius of curvature changes gradually from the center to the edge, controlling the light path at the edge of the field of view, correcting aberrations, and further improving the imaging quality of the optical lens.

[0078] In an exemplary embodiment, the optical lens satisfies: 0.05 ≤ BFL / TTL ≤ 0.25, where TTL is the distance on the optical axis from the first side surface of the first lens to the imaging plane of the optical lens, and BFL is the distance on the optical axis from the second side surface of the seventh lens to the imaging plane of the optical lens. By reasonably controlling the back focal length of the lens, miniaturization can be achieved while reserving space for the installation and focusing of optical components, avoiding mechanical interference. More specifically, the optical lens satisfies: 0.07 ≤ BFL / TTL ≤ 0.21, which is more conducive to achieving lens miniaturization.

[0079] In an exemplary embodiment, the optical lens satisfies the following condition: 55° ≤ (FOV × F) / H ≤ 63°, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the above conditions, the lens can simultaneously satisfy both telephoto and large angular resolution. That is, when the chip pixel size is constant, the larger the chip size image height H, the higher the angular resolution, and angular resolution is positively correlated with image height H. More specifically, the optical lens satisfies the condition: 57° ≤ (FOV × F) / H ≤ 61°, which is more conducive to the lens simultaneously satisfying both telephoto and large angular resolution.

[0080] In an exemplary embodiment, the optical lens satisfies: 3 ≤ TTL / F ≤ 6.5, where F is the total effective focal length of the optical lens, and TTL is the distance along the optical axis from the first side of the first lens to the imaging plane of the optical lens, i.e., the total optical length of the lens. By controlling the above conditions, it is beneficial to achieve a shorter TTL for the same focal length, thereby realizing lens miniaturization. More specifically, the optical lens satisfies: 3.8 ≤ TTL / F ≤ 6.3, which is even more conducive to lens miniaturization.

[0081] In an exemplary embodiment, the optical lens satisfies: 0.15 ≤ TTL / H / FOV × 1° ≤ 0.35, where TTL is the distance along the optical axis from the first side of the first lens to the imaging plane of the optical lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the above conditions, it is beneficial to achieve a shorter TTL for the same focal length, thereby realizing lens miniaturization. More specifically, the optical lens satisfies: 0.19 ≤ TTL / H / FOV × 1° ≤ 0.3, which is even more conducive to lens miniaturization.

[0082] In an exemplary embodiment, the optical lens satisfies: 0.24 ≤ (F × θ) / D ≤ 0.45, where F is the total effective focal length of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens. By controlling the above conditions, the front aperture of the lens can be made smaller, reducing the volume of the lens's imaging system. More specifically, the optical lens satisfies: 0.28 ≤ (F × θ) / D ≤ 0.41, which is more conducive to achieving a small front aperture of the lens.

[0083] In an exemplary embodiment, the optical lens satisfies: 0.04 ≤ D / H / FOV × 1° ≤ 0.14, where FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens. By controlling the above conditions, the front aperture of the lens can be made smaller, which is beneficial for miniaturizing the lens. More specifically, the optical lens satisfies: 0.06 ≤ D / H / FOV × 1° ≤ 0.12, which is even more conducive to achieving a small front aperture of the lens.

[0084] In an exemplary embodiment, the optical lens satisfies: 0.12mm -1 ≤D / H / F≤0.25mm -1 Where F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens. By controlling the above conditions, under the condition of fixed focal length, the lens can be provided with the characteristics of large target surface and small aperture. More specifically, the optical lens satisfies: 0.14mm -1 ≤D / H / F≤0.22mm -1 This makes it easier to achieve a small aperture at the front of the lens.

[0085] In an exemplary embodiment, the optical lens satisfies: 1.1 ≤ F / H ≤ 2.4, where F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the total effective focal length and the image height corresponding to the maximum field of view of the optical lens, the optical lens possesses a large image plane and telephoto characteristics, which helps to improve the lens's resolving power. More specifically, the optical lens satisfies: 1.3 ≤ F / H ≤ 2.1, which is even more conducive to improving the lens's resolving power.

[0086] In an exemplary embodiment, the optical lens satisfies the condition: 0.7 ≤ F / ENPD ≤ 1.5, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. By controlling these conditions, a small FNO of the lens can be achieved, which is beneficial for increasing light transmission, and a large entrance pupil diameter helps improve the relative illumination of the lens. More specifically, the optical lens satisfies the condition: 0.7 ≤ F / ENPD ≤ 1.1, which is even more beneficial for increasing light transmission. In particular, this helps the optical lens to better capture objects at a distance.

[0087] In an exemplary embodiment, the optical lens satisfies: 0.01mm -1 ≤F / ENPD / D≤0.06mm -1 Where F is the total effective focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens. By controlling the above conditions, a small aperture can be ensured while maintaining high light transmission, thus achieving lens miniaturization. More specifically, the optical lens satisfies: 0.015mm. -1 ≤F / ENPD / D≤0.045mm -1 This makes it easier to achieve high light transmission and miniaturization of the lens.

[0088] In an exemplary embodiment, the optical lens satisfies: 0.85 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.05, where F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens. By controlling the ratio of the actual image height to the ideal image height, it is helpful to achieve a large angular resolution. More specifically, the optical lens satisfies: 0.89 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1, which is even more conducive to achieving a large angular resolution.

[0089] In an exemplary embodiment, the optical lens satisfies: |F6 / F|≥1.6, where F is the total effective focal length of the optical lens and F6 is the effective focal length of the sixth lens. By reasonably allocating the effective focal length of the sixth lens, the forward light can be collected as much as possible and smoothly transitioned to the imaging plane, correcting aberrations and further resolving the image, thereby ensuring the system's light transmission while achieving high resolution. More specifically, the optical lens satisfies: 1.8≤|F6 / F|≤17; the optical lens can also satisfy: 2.2≤|F6 / F|≤12, which is more conducive to achieving high resolution. In an exemplary embodiment, the sixth lens is crescent-shaped, and the radii of curvature of its first and second sides can tend to be similar, and the value of F6 can tend to infinity. By reasonably designing, a sixth lens with positive or negative optical power can be obtained. For example, in several embodiments of this application, the effective focal length F6 of the sixth lens has an absolute value exceeding 100mm. In this case, the sixth lens mainly plays the role of adjusting the light path and correcting aberrations.

[0090] Furthermore, the sixth and seventh lenses are meniscus-shaped, and |F6 / F|≥1.6 can be combined with 0<R9 / R12≤3 to ensure continuous light convergence, balance the aberrations of the optical lens, improve image quality, and facilitate the realization of a small aperture at the rear end. Even further, the optical lens can satisfy at least one of the following conditions: 1.8≤|F6 / F|≤17, 2.2≤|F6 / F|≤12, and 0.2≤R9 / R12≤2.1, which further enhances the image quality of the optical lens and enables miniaturization.

[0091] In an exemplary embodiment, the optical lens satisfies: 0.1 ≤ R14 / TTL ≤ 0.5, where TTL is the distance on the optical axis from the first side surface of the first lens to the imaging plane of the optical lens, and R14 is the radius of curvature of the second side surface of the seventh lens. The second side surface of the seventh lens is concave, which can soften the final trajectory of the forward beam, allowing the light to diverge appropriately, which is beneficial for the smooth transition of light to the imaging plane, thereby achieving high light transmission and high resolution of the lens. More specifically, the optical lens satisfies: 0.15 ≤ R14 / TTL ≤ 0.4, which is even more conducive to achieving high light transmission and high resolution of the lens.

[0092] In an exemplary embodiment, the optical lens satisfies the following condition: 1° / mm ≤ FOV / F ≤ 4.5° / mm, where FOV is the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. By controlling these conditions, it is beneficial to achieve high resolution while maintaining the image plane size. More specifically, the optical lens satisfies the following condition: 1.4° / mm ≤ FOV / F ≤ 3.5° / mm, which is even more conducive to improving the lens's resolving power. In particular, the optical lens has telephoto characteristics, which makes it more effective for long-range information detection, and further, gives the optical lens good performance for long-range radar detection.

[0093] In an exemplary embodiment, the optical lens satisfies: 1.4 ≤ T23 / T12 ≤ 14.5, where T12 is the distance between the first and second lenses on the optical axis, and T23 is the distance between the second and third lenses on the optical axis. Both the first and second lenses have negative optical power. By reducing the distance between the first and second lenses on the optical axis, the optical path between them is reduced, allowing for progressive diffusion of the light beam within a shorter distance. This is beneficial for aberration correction and miniaturization. Simultaneously, increasing the distance between the second and third lenses on the optical axis increases the light transmission of the optical system, which helps reduce FNO and improve resolution. More specifically, the optical lens satisfies: 1.6 ≤ T23 / T12 ≤ 10, which is more conducive to achieving high light transmission.

[0094] In an exemplary embodiment, the optical lens satisfies: -0.92 ≤ (1 / F1 + 1 / F2) / (1 / F) < 0, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens. Both the first and second lenses have negative optical power. By increasing the optical power of the first and second lenses, the exit angle of light passing through the second lens is reduced, which is beneficial for a smooth transition of light transmitted to the rear optical system and improves resolution. More specifically, the optical lens satisfies: -0.74 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -0.19, which is more conducive to achieving high resolution of the lens.

[0095] Furthermore, -0.92≤(1 / F1+1 / F2) / (1 / F)<0 can be combined with 0.08≤T23 / TTL≤0.2, which is beneficial for achieving high light transmission and high image quality. Even further, the optical lens can satisfy at least one of the following conditions: -0.74≤(1 / F1+1 / F2) / (1 / F)≤-0.19 and 0.1≤T23 / TTL≤0.17, which is even more conducive to achieving high resolution and a small FNO.

[0096] In an exemplary embodiment, the optical lens satisfies: 1.6 ≤ F3 / F ≤ 15, where F is the total effective focal length of the optical lens and F3 is the effective focal length of the third lens. By rationally allocating the effective focal length of the third lens, diffused light rays can be gathered, which is beneficial for lens miniaturization and further improves resolution. More specifically, the optical lens satisfies: 2.1 ≤ F3 / F ≤ 13.1, which is more conducive to achieving high resolution.

[0097] In an exemplary embodiment, the optical lens satisfies: F4 / F≤-2, where F is the total effective focal length of the optical lens and F4 is the effective focal length of the fourth lens. The fourth lens has negative optical power. By reasonably allocating the effective focal length of the fourth lens, the light rays already converged by the third lens can be smoothly transitioned and further diffused, thereby increasing the light transmission of the lens and achieving a small FNO. Secondly, if the effective focal length of the fourth lens is too small, the diffused light beam will further diffuse rapidly, and the light path will become steep, making it difficult to achieve high resolution of the lens. Therefore, in order to ensure high resolution of the lens, the effective focal length of the fourth lens in this application is relatively large. More specifically, the optical lens satisfies: -17.2≤F4 / F≤-2.6, which is more conducive to achieving high resolution of the lens. In exemplary embodiments, in several embodiments of this application, the effective focal length F4 of the fourth lens has an absolute value exceeding 100mm. In this case, the ability of the fourth lens to diverge light is slightly weaker, and it can mainly play the role of smoothly transitioning light.

[0098] In an exemplary embodiment, the optical lens satisfies: 1.2 ≤ F5 / F ≤ 6.2, where F is the total effective focal length of the optical lens and F5 is the effective focal length of the fifth lens. By rationally allocating the effective focal length of the fifth lens, while receiving the diffused light beam from the front, optical power compensation is achieved through the front fourth lens, which has negative optical power, thus enabling convergence and resolution. Furthermore, the relatively large effective focal length of the fifth lens avoids excessively steep convergence of light rays, thereby achieving high resolution. More specifically, the optical lens satisfies: 1.6 ≤ F5 / F ≤ 4.7, which is even more conducive to achieving high resolution.

[0099] In an exemplary embodiment, the optical lens satisfies: 0 < R9 / R12 ≤ 3, where R9 is the radius of curvature of the first side surface of the fifth lens and R12 is the radius of curvature of the second side surface of the sixth lens. The first side surface of the fifth lens and the second side surface of the sixth lens are curved in the same direction, which better collects forward-diverging light rays and smooths the trajectory of the edge field of view beam, thus facilitating the correction of edge field of view aberrations. More specifically, the optical lens satisfies: 0.2 ≤ R9 / R12 ≤ 2.1, which is more conducive to achieving high resolution.

[0100] In an exemplary embodiment, the optical lens satisfies: (F1+F2+F4) / 3F≤-5, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F4 is the effective focal length of the fourth lens. The first, second, and fourth lenses all have negative optical power. By controlling the distribution of the effective focal lengths of the first, second, and fourth lenses, the average focal length of the three lenses is made larger, resulting in a smoother light path in front of the lens, reducing the sensitivity of the first to fourth lenses, and improving the image quality of the lens while maintaining a small FNO. More specifically, the optical lens satisfies: -12≤(F1+F2+F4) / 3F≤-6.5, which is more conducive to achieving high resolution.

[0101] In an exemplary embodiment, the optical lens satisfies: -8 ≤ R3 / F ≤ -0.5, where F is the total effective focal length of the optical lens, and R3 is the radius of curvature of the first side surface of the second lens. By controlling the radius of curvature of the first side surface of the second lens, the light rays diverging from the second side surface of the first lens can be received and continued to diverge, which is beneficial to increasing the light transmission of the lens, while making the light rays exit smoothly, which is beneficial to improving the field curvature isometric aberration of the lens. More specifically, the optical lens satisfies: -5.7 ≤ R3 / F ≤ -1, which is more conducive to achieving high resolution of the lens.

[0102] Furthermore, -8 ≤ R3 / F ≤ -0.5 can be combined with -0.92 ≤ (1 / F1 + 1 / F2) / (1 / F) < 0 to ensure smooth light divergence to the third lens, thereby achieving both a small FNO and high image quality in the optical lens. Even further, the optical lens can satisfy at least one of the following conditions: -5.7 ≤ R3 / F ≤ -1 and -0.74 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -0.19, which is even more conducive to achieving a small FNO and high image quality in the optical lens.

[0103] In an exemplary embodiment, the optical lens satisfies the following condition: 0 < T56 / R11 ≤ 0.6, where T56 is the distance between the fifth and sixth lenses on the optical axis, and R11 is the radius of curvature of the first side surface of the sixth lens. By reasonably controlling the above conditions, the forward light can be better collected and the light can be deflected towards the center, thereby improving the imaging quality of the central field of view. For example, appropriately lengthening the distance between the fifth and sixth lenses on the optical axis and / or reducing the curvature of the first side surface of the sixth lens helps to reduce the height of the light entering the sixth lens, thus achieving a small aperture. More specifically, the optical lens satisfies: 0.02 ≤ T56 / R11 ≤ 0.4; furthermore, the optical lens satisfies: 0.1 ≤ T56 / R11 ≤ 0.4, which is more conducive to achieving high resolution of the lens.

[0104] In an exemplary embodiment, the optical lens satisfies: |R12 / F6|≤1.6, where R12 is the radius of curvature of the second side surface of the sixth lens, and F6 is the effective focal length of the sixth lens. By reasonably controlling the above conditions, the light path can be appropriately moderated, so that there is no large beam deflection when the light passes through the sixth lens, reducing the system sensitivity. At the same time, it is beneficial to correct aberrations in the edge field of view, thereby sharing the imaging pressure with the fifth and seventh lenses, and ultimately improving the overall resolution of the system. More specifically, the optical lens satisfies: 0.06≤|R12 / F6|≤1.1, which is more conducive to achieving high resolution of the lens.

[0105] Furthermore, |R12 / F6|≤1.6 can be combined with 0<T56 / R11≤0.6, which facilitates the smooth convergence of light to the imaging plane, ultimately improving the overall resolution of the system. Even further, the optical lens can satisfy at least one of the following conditions: 0.06≤|R12 / F6|≤1.1, 0.02≤T56 / R11≤0.4, and 0.1≤T56 / R11≤0.4, resulting in even better high-resolution performance.

[0106] In an exemplary embodiment, the optical lens satisfies: 1 ≤ F7 / F, where F is the total effective focal length of the optical lens and F7 is the effective focal length of the seventh lens. By controlling the seventh lens to be a positive lens and by reasonably controlling the above conditions, it is beneficial for light to converge, reducing the back focal length to a certain extent, and thus reducing the overall system length. For example, appropriately increasing the effective focal length of the seventh lens is beneficial for the light to converge smoothly to the imaging plane, improving the resolution quality. More specifically, the optical lens satisfies: 1.5 ≤ F7 / F ≤ 12, which is more conducive to achieving high resolution.

[0107] In an exemplary embodiment, the optical lens satisfies: F7 / F ≤ -10, where F is the total effective focal length of the optical lens and F7 is the effective focal length of the seventh lens. By controlling the seventh lens to be a negative lens and having a relatively large absolute value of its focal length, it is beneficial to perform final smoothing adjustments on the light before imaging, correcting aberrations and improving resolution. More specifically, the optical lens satisfies: F7 / F ≤ -16, which is more conducive to achieving high resolution.

[0108] In an exemplary embodiment, the seventh lens is crescent-shaped, and the radii of curvature of its first and second sides can tend to be similar. The effective focal length of the seventh lens can tend to infinity. A seventh lens with positive or negative optical power can be obtained through reasonable design. For example, in several embodiments of this application, the effective focal length of the seventh lens has an absolute value exceeding 100mm. In this case, the seventh lens mainly functions to adjust the light path and correct aberrations.

[0109] In an exemplary embodiment, the optical lens may include an aperture stop for limiting the light beam, thereby further improving the image quality of the optical lens. For example, the aperture stop may be positioned between the third and fourth lenses, which helps to balance the aperture sizes of the front and rear lenses, achieving a small FNO while smoothing the light path. For example, the aperture stop may be positioned between the fifth and sixth lenses, which also helps to balance the aperture sizes of the front and rear lenses, achieving a small FNO while smoothing the light path. However, it should be noted that the positions of the aperture stops disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be positioned in other locations as needed.

[0110] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the seventh lens and the imaging surface. The filter can filter light of different wavelengths, and the protective glass can prevent damage to components (e.g., chips) on the second side of the optical lens.

[0111] In an exemplary embodiment, the first to seventh lenses can be spherical lenses or aspherical lenses. This application does not specifically limit the number of spherical and aspherical lenses; when image quality is a primary concern, the number of aspherical lenses can be increased, and even all lenses can be aspherical. The characteristic of aspherical lenses is that their curvature changes continuously from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the image quality of the lens. The use of aspherical lenses helps correct system aberrations and improves resolving power. Specifically, for example, when resolving power is a primary concern, all lenses can be aspherical. For example, the seventh lens is an aspherical lens, which can adjust the convergence of light rays to the imaging plane, better correcting aberrations and improving the lens's resolving power.

[0112] In an exemplary embodiment, the first to seventh lenses may be glass lenses and / or plastic lenses. This application does not specifically limit the number of glass lenses and plastic lenses. Optical lenses made of glass can suppress the shift of the back focus of an optical lens due to temperature changes, thereby improving the stability of the optical lens. Using glass can avoid problems such as lens blurring caused by high and low temperature changes in the operating environment, and problems affecting the normal use of the lens. For example, when temperature performance is a primary concern, all lenses can be made of glass.

[0113] The optical lens according to the above embodiments of this application, through the reasonable setting of the shape and power of each lens, as well as optical technical parameters, can have at least one beneficial effect such as high resolution, miniaturization, small front aperture, high light transmission, low distortion, long focal length, and high imaging quality.

[0114] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven lenses. If desired, the optical lens may also include other numbers of lenses.

[0115] It should be noted that the optical lenses provided in Embodiments 1 to 16 of this application can all achieve good imaging quality, and their MTF curves are quite similar. Therefore, the optical lenses provided in this application... Figures 17 to 22 The MTF curves of Embodiments 1, 3, 8, 9, 15, and 16 are shown only as examples. The MTF curves of other embodiments are not shown individually, and those skilled in the art should be able to understand them based on the disclosure of this application. It should be understood that MTF stands for Modulation Transfer Function, which describes the ability of an optical system to "reproduce" the object from the image side. The horizontal axis of the modulation transfer function curve represents the spatial frequency, measured in line pairs per millimeter (lp / mm), and the vertical axis represents the optical modulation function value, i.e., the MTF value.

[0116] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0117] Example 1

[0118] Figure 1 A schematic diagram of the optical lens of Embodiment 1 of this application is shown. Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7.

[0119] The first lens L1 has negative optical power, with its first side surface S1 being concave and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being convex and its second side surface S8 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has negative optical power, with its first side surface S12 being convex and its second side surface S13 being concave. The seventh lens L7 has positive optical power, with its first side surface S14 being convex and its second side surface S15 being concave.

[0120] The optical lens may also include an aperture stop STO (plane S11), which may be positioned between the fifth lens L5 and the sixth lens L6.

[0121] The optical lens may also include a filter L8 having a first side surface S16 and a second side surface S17, and a protective glass L9 having a first side surface S18 and a second side surface S19.

[0122] Table 1 shows the basic parameters of each lens in the optical lens of Example 1.

[0123] Table 1

[0124] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -27.4315 8.0008 1.85 23.79 S2 -37.9333 3.0145 S3 -28.6277 8.0001 1.90 31.32 S4 -40.2491 13.4819 S5 89.4352 8.1854 1.90 31.32 S6 -173.6858 0.5000 S7 28.4656 6.6769 1.52 64.20 S8 20.4326 8.5001 S9 18.8349 8.0025 1.85 23.79 S10 36.1828 3.2816 STO(S11) endless 0.8002 S12 16.3998 3.3534 1.90 31.32 S13 13.5582 1.0429 S14 11.1914 6.7378 1.68 30.71 S15 13.6443 3.1239 S16 endless 1.1000 1.52 54.09 S17 endless 1.2762 S18 endless 0.5000 1.52 54.09 S19 endless 1.3675 IMA endless

[0125] In this embodiment, the first side surface S14 and the second side surface S15 of the seventh lens L7 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0126]

[0127] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 1.

[0128] Table 2

[0129] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.4555 4.8353E-06 1.6973E-06 -5.3760E-08 8.0639E-10 -5.0941E-12 0.0000E+00 0.0000E+00 S15 2.4142 4.7452E-05 5.9961E-08 -1.3782E-07 5.4834E-09 -8.5666E-11 0.0000E+00 0.0000E+00

[0130] The FNO of the optical lens in Example 1 is 0.7. For example... Figure 17As shown, the edge field of view of the optical lens of Embodiment 1 has an MTF value exceeding 0.39 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Embodiment 1 has good imaging quality.

[0131] Example 2

[0132] In this embodiment and the following embodiments, for the sake of brevity, the omitted parts are similar to the description in Embodiment 1.

[0133] Figure 2 A schematic diagram of the optical lens structure of Embodiment 2 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 3, and will not be described further.

[0134] Table 3 shows the basic parameters of each lens in the optical lens of Example 2.

[0135] Table 3

[0136] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -27.2044 8.0003 1.85 23.79 S2 -40.4637 3.0168 S3 -28.1331 8.0001 1.90 31.32 S4 -41.6016 13.1172 S5 62.0253 8.1763 1.90 31.32 S6 -195.0137 0.4999 S7 199.0088 3.6053 1.52 64.20 S8 66.2335 0.4942 S9 19.9728 8.0002 1.85 23.79 S10 29.2653 5.7850 STO(S11) endless 0.4999 S12 16.0945 3.4813 1.90 31.32 S13 13.2465 0.4999 S14 9.7855 5.5637 1.68 30.71 S15 12.5654 4.0187 S16 endless 1.1000 1.52 54.09 S17 endless 2.5000 S18 endless 0.5000 1.52 54.09 S19 endless 1.3670 IMA endless

[0137] Table 4 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 2. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0138] Table 4

[0139] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.2450 -2.5876E-05 1.5862E-06 -4.2602E-08 5.1962E-10 -3.8873E-12 0.0000E+00 0.0000E+00 S15 -0.1712 1.9174E-04 2.0198E-06 -6.4790E-08 9.1979E-10 -1.1286E-11 0.0000E+00 0.0000E+00

[0140] The optical lens of Example 2 has an FNO of 0.7. The edge field of view of the optical lens of Example 2 has an MTF value exceeding 0.41 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 2 has good imaging quality.

[0141] Example 3

[0142] Figure 3 A schematic diagram of the optical lens structure of Embodiment 3 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 5, and will not be described further.

[0143] Table 5 shows the basic parameters of each lens in the optical lens of Example 3.

[0144] Table 5

[0145] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -26.0129 8.0002 1.85 23.79 S2 -58.8285 3.0134 S3 -30.948 8.0011 1.90 31.32 S4 -42.227 11.3816 S5 62.3732 6.9283 1.90 31.32 S6 -221.0752 0.4999 S7 28.3945 3.7463 1.52 64.20 S8 21.1497 1.8245 S9 19.1414 8.0001 1.85 23.79 S10 54.3356 4.1406 STO(S11) endless 0.9945 S12 159.0859 5.7284 1.90 31.32 S13 33.3936 0.4999 S14 10.5887 6.7735 1.68 30.71 S15 13.8544 3.9710 S16 endless 1.1000 1.52 54.09 S17 endless 2.1999 S18 endless 0.5000 1.5200 54.09 S19 endless 1.2271 IMA endless

[0146] Table 6 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 3. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0147] Table 6

[0148] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.1599 -2.2257E-05 8.6916E-07 -3.1166E-08 4.8143E-10 -3.3906E-12 0.0000E+00 0.0000E+00

[0149]

[0150] The FNO of the optical lens in Example 3 is 0.9. For example... Figure 18 As shown, the MTF value of the edge field of view of the optical lens of Embodiment 3 exceeds 0.74 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Embodiment 3 has good imaging quality.

[0151] Example 4

[0152] Figure 4 A schematic diagram of the optical lens structure of Embodiment 4 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 7, and will not be described further.

[0153] Table 7 shows the basic parameters of each lens in the optical lens of Example 4.

[0154] Table 7

[0155] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -31.7733 3.2860 1.85 23.79 S2 200.1331 3.4218 S3 -61.9679 3.3955 1.90 31.32 S4 -99.0501 9.8389 S5 106.3746 6.2537 1.90 31.32 S6 -70.6363 4.5620 S7 -32.489 2.9575 1.52 64.20 S8 -70.788 0.4717 S9 28.6297 8.0009 1.85 23.79 S10 86.6499 3.0558 STO(S11) endless 1.2190 S12 19.1603 8.4973 1.90 31.32 S13 13.7033 2.4659 S14 12.2916 8.5815 1.68 30.71 S15 30.0883 4.8557 S16 endless 1.1000 1.52 54.09 S17 endless 4.8552 S18 endless 0.5000 1.52 54.09 S19 endless 1.2271 IMA endless

[0156] Table 8 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 4. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0157] Table 8

[0158] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.0716 -3.3927E-05 -2.3325E-07 -1.1778E-09 -8.1837E-12 -1.6161E-13 0.0000E+00 0.0000E+00 S15 3.2478 4.9480E-05 1.2477E-07 -1.5752E-08 3.5436E-11 2.2311E-13 0.0000E+00 0.0000E+00

[0159] The optical lens of Example 4 has an FNO of 0.9. The edge field of view of the optical lens of Example 4 has an MTF value exceeding 0.44 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 4 has good image quality.

[0160] Example 5

[0161] Figure 5 A schematic diagram of the optical lens structure of Embodiment 5 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 9, and will not be described further.

[0162] Table 9 shows the basic parameters of each lens in the optical lens of Example 5.

[0163] Table 9

[0164] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -24.8131 2.9314 1.85 23.79 S2 200.0103 3.0043 S3 -70.6327 8.0000 1.90 31.32 S4 -125.8425 8.9122 S5 66.8701 9.1518 1.90 31.32 S6 -71.503 2.9193 S7 -67.1443 3.9482 1.52 64.20 S8 -207.6351 0.4230 S9 24.7024 8.0000 1.85 23.79 S10 48.4229 6.1326 STO(S11) endless 0.5000 S12 195.0003 5.2971 1.90 31.32 S13 90.3946 0.5000 S14 13.4244 8.2229 1.68 30.71 S15 20.7818 6.7655 S16 endless 1.1000 1.52 54.09 S17 endless 6.7142 S18 endless 0.5000 1.52 54.09 S19 endless 1.2271 IMA endless

[0165] Table 10 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 5. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0166] Table 10

[0167] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.1053 -1.8923E-05 2.5668E-07 -5.3647E-09 3.6666E-11 -1.4292E-13 0.0000E+00 0.0000E+00 S15 0.7903 9.8659E-05 -8.3321E-07 1.5925E-08 -1.7696E-10 5.7369E-13 0.0000E+00 0.0000E+00

[0168] The optical lens of Example 5 has an FNO of 0.9. The edge field of view of the optical lens of Example 5 has an MTF value exceeding 0.43 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 5 has good image quality.

[0169] Example 6

[0170] Figure 6 A schematic diagram of the optical lens structure of Embodiment 6 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 11, and will not be described further.

[0171] Table 11 shows the basic parameters of each lens in the optical lens of Example 6.

[0172] Table 11

[0173] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -29.178 1.6814 1.85 23.79 S2 200.0056 5.1384 S3 -22.7957 5.7830 1.90 31.32 S4 -29.3517 9.9961 S5 66.7603 6.4827 1.90 31.32 S6 -125.2635 2.8204 S7 -125.3888 3.8895 1.52 64.20 S8 144.1109 0.4780 S9 20.3849 8.5518 1.85 23.79 S10 74.0051 3.9953 STO(S11) endless 1.0371 S12 213.9296 3.2418 1.90 31.32 S13 30.3303 0.4333 S14 11.3745 7.7691 1.68 30.71 S15 21.6123 5.9379 S16 endless 1.1000 1.52 54.09 S17 endless 6.7303 S18 endless 0.5000 1.52 54.09 S19 endless 1.2271 IMA endless

[0174] Table 12 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 6. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0175] Table 12

[0176] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.2461 -2.2287E-05 1.4600E-07 -7.3599E-09 9.4561E-11 -6.8259E-13 0.0000E+00 0.0000E+00 S15 2.4609 1.4647E-04 -9.4636E-07 4.2807E-08 -6.4981E-10 2.1183E-12 0.0000E+00 0.0000E+00

[0177] The optical lens of Example 6 has an FNO of 1.1. The edge field of view of the optical lens of Example 6 has an MTF value exceeding 0.49 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 6 has good imaging quality.

[0178] Example 7

[0179] Figure 7 A schematic diagram of the optical lens structure of Embodiment 7 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has negative optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 13, and will not be described further.

[0180] Table 13 shows the basic parameters of each lens in the optical lens of Example 7.

[0181] Table 13

[0182] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -22.3649 2.4874 1.85 23.79 S2 -28.8294 1.1118 S3 -32.6609 3.6588 1.90 31.32 S4 99.0946 8.8628 S5 70.084 7.9112 1.90 31.32 S6 -63.2904 5.4825 S7 24.1528 5.0230 1.52 64.20 S8 17.4504 5.9521 S9 18.8017 7.9314 1.85 23.79 S10 75.5142 3.7927 STO(S11) endless 1.6788 S12 189.0859 3.0163 1.90 31.32 S13 52.2067 1.1174 S14 13.0176 8.8428 1.68 30.71 S15 17.0877 3.9159 S16 endless 1.1000 1.52 54.09 S17 endless 4.6934 S18 endless 0.5000 1.52 54.09 S19 endless 1.2271 IMA endless

[0183] Table 14 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 7. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0184] Table 14

[0185] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.4696 -2.2596E-05 5.1380E-07 -2.0769E-08 2.7502E-10 -1.8102E-12 0.0000E+00 0.0000E+00 S15 -0.5165 1.0688E-04 -1.6064E-06 8.0078E-08 -2.0760E-09 1.3674E-11 0.0000E+00 0.0000E+00

[0186] The optical lens of Example 7 has an FNO of 1.1. The edge field of view of the optical lens of Example 7 has an MTF value exceeding 0.44 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 7 has good imaging quality.

[0187] Example 8

[0188] Figure 8 A schematic diagram of the optical lens structure of Embodiment 8 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from the data in Table 15, and will not be described further.

[0189] The optical lens may also include an aperture stop STO (plane S7), which may be positioned between the third lens L3 and the fourth lens L4.

[0190] Table 15 shows the basic parameters of each lens in the optical lens of Example 8.

[0191] Table 15

[0192] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -35.917 5.3446 1.67 47.29 S2 -96.8076 4.0008 S3 -24.9701 4.9994 1.67 47.29 S4 -32.203 9.9978 S5 72.6844 7.5040 1.90 31.32 S6 -164.1995 0.4414 STO (S7) endless 2.7382 S8 -38.7369 4.8043 1.67 47.29 S9 -63.3343 1.1059 S10 29.2792 8.0064 1.85 23.79 S11 64.3751 4.0067 S12 21.456 8.0082 1.90 31.32 S13 36.7431 3.0971 S14 16.7792 7.5037 1.68 30.71 S15 12.7272 3.8435 S16 endless 1.1000 1.52 54.09 S17 endless 0.5000 S18 endless 0.5000 1.52 54.09 S19 endless 0.5000 IMA endless

[0193] Table 16 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 8. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0194] Table 16

[0195] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.1306 -1.5716E-05 -5.1046E-07 1.3076E-08 -2.3623E-10 2.0042E-12 -6.6281E-15 0.0000E+00 S15 -0.0615 1.3145E-04 1.2994E-06 1.7217E-08 -7.6791E-11 7.7486E-12 1.3780E-13 0.0000E+00

[0196] The FNO of the optical lens in Example 8 is 0.9. For example... Figure 19 As shown, the edge field of view of the optical lens of Embodiment 8 has an MTF value exceeding 0.74 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Embodiment 8 has good imaging quality.

[0197] Example 9

[0198] Figure 9 A schematic diagram of the optical lens structure of Embodiment 9 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from the data in Table 17, and will not be described further.

[0199] The optical lens may also include an aperture stop STO (plane S7), which may be positioned between the third lens L3 and the fourth lens L4.

[0200] Table 17 shows the basic parameters of each lens in the optical lens of Example 9.

[0201] Table 17

[0202] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -32.7579 8.0061 1.67 47.29 S2 -64.9337 3.9517 S3 -22.4906 4.9890 1.67 47.29 S4 -32.2052 9.9886 S5 108.9883 4.9964 1.90 31.32 S6 -379.4863 0.0932 STO (S7) endless 0.0919 S8 36.6612 4.9257 1.67 47.29 S9 24.3554 2.7297 S10 26.323 8.0074 1.85 23.79 S11 126.0749 4.0071 S12 21.12 8.0061 1.90 31.32 S13 35.1841 3.5941 S14 18.2499 8.0214 1.68 30.71 S15 13.7964 4.0085 S16 endless 1.1000 1.52 54.09 S17 endless 0.5000 S18 endless 0.5000 1.52 54.09 S19 endless 0.5000 IMA endless

[0203] Table 18 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 9. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0204] Table 18

[0205] Face number k A4 A6 A8 A10 A12 A14 A16 S14 0.1559 -1.8665E-05 -5.5714E-07 1.6486E-08 -2.9215E-10 2.5149E-12 -8.9147E-15 0.0000E+00 S15 -0.0767 7.5226E-05 2.4587E-06 -1.6449E-08 -1.4181E-09 8.6423E-11 -1.0654E-12 0.0000E+00

[0206] The FNO of the optical lens in Example 9 is 0.9. For example... Figure 20 As shown, the edge field of view of the optical lens of Embodiment 9 has an MTF value exceeding 0.73 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Embodiment 9 has good imaging quality.

[0207] Example 10

[0208] Figure 10 A schematic diagram of the optical lens structure of Embodiment 10 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from the data in Table 19, and will not be described further.

[0209] The optical lens may also include an aperture stop STO (plane S7), which may be positioned between the third lens L3 and the fourth lens L4.

[0210] Table 19 shows the basic parameters of each lens in the optical lens of Example 10.

[0211] Table 19

[0212]

[0213]

[0214] Table 20 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 10. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0215] Table 20

[0216] Face number k A4 A6 A8 A10 A12 A14 A16 S14 0.2387 -3.2327E-05 -6.4428E-07 1.4634E-08 -2.5920E-10 2.1026E-12 -6.5606E-15 0.0000E+00 S15 -0.3578 1.7975E-04 2.5201E-06 -1.0281E-07 8.2158E-09 -2.1667E-10 2.9347E-12 0.0000E+00

[0217] The optical lens of Example 10 has an FNO of 0.9. The edge field of view of the optical lens of Example 10 has an MTF value exceeding 0.69 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 10 has good imaging quality.

[0218] Example 11

[0219] Figure 11 A schematic diagram of the optical lens structure of Embodiment 11 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from the data in Table 21, and will not be described further.

[0220] The optical lens may also include an aperture stop STO (plane S7), which may be positioned between the third lens L3 and the fourth lens L4.

[0221] Table 21 shows the basic parameters of each lens in the optical lens of Embodiment 11.

[0222] Table 21

[0223]

[0224]

[0225] Table 22 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 11. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0226] Table 22

[0227] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.5343 -6.7494E-05 -8.7180E-07 1.2317E-08 -2.6904E-10 2.7880E-12 -9.8192E-15 0.0000E+00 S15 1.8176 -1.0476E-04 -4.9809E-06 -1.0224E-07 7.7484E-09 -1.8808E-10 9.4372E-13 0.0000E+00

[0228] The optical lens of Example 11 has an FNO of 0.9. The edge field of view of the optical lens of Example 11 has an MTF value exceeding 0.54 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 11 has good imaging quality.

[0229] Example 12

[0230] Figure 12A schematic diagram of the optical lens structure of Embodiment 12 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from the data in Table 23, and will not be described further.

[0231] The optical lens may also include an aperture stop STO (plane S7), which may be positioned between the third lens L3 and the fourth lens L4.

[0232] Table 23 shows the basic parameters of each lens in the optical lens of Example 12.

[0233] Table 23

[0234]

[0235]

[0236] Table 24 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 12. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0237] Table 24

[0238] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -1.4031 -1.1927E-04 4.2316E-07 -2.0647E-08 -3.2735E-10 1.6095E-11 -1.3153E-13 0.0000E+00 S15 -0.1999 3.5398E-05 -7.8913E-06 2.8310E-07 6.3679E-09 -6.3347E-10 1.1549E-11 0.0000E+00

[0239] The optical lens of Example 12 has an FNO of 1.1. The edge field of view of the optical lens of Example 12 has an MTF value exceeding 0.58 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 12 has good imaging quality.

[0240] Example 13

[0241] Figure 13 A schematic diagram of the optical lens structure of Embodiment 13 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 25, and will not be described further.

[0242] Table 25 shows the basic parameters of each lens in the optical lens of Example 13.

[0243] Table 25

[0244]

[0245]

[0246] Table 26 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 13. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0247] Table 26

[0248] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.4658 8.3159E-05 -7.8447E-07 1.2526E-08 -6.1693E-11 1.7919E-13 0.0000E+00 0.0000E+00 S15 0.8460 3.0084E-04 -1.1900E-05 4.1754E-07 -6.5282E-09 4.6725E-11 0.0000E+00 0.0000E+00

[0249] The optical lens of Example 13 has an FNO of 1.1. The edge field of view of the optical lens of Example 13 has an MTF value exceeding 0.6 at a spatial frequency of 25 lp / mm. Therefore, the optical lens provided in Example 13 has good imaging quality.

[0250] Example 14

[0251] Figure 14 A schematic diagram of the optical lens structure of Embodiment 14 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 27, and will not be described further.

[0252] Table 27 shows the basic parameters of each lens in the optical lens of Example 14.

[0253] Table 27

[0254]

[0255]

[0256] Table 28 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 14. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0257] Table 28

[0258] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.5988 1.6904E-05 3.7754E-07 -8.1645E-09 8.2060E-11 -4.0831E-13 0.0000E+00 0.0000E+00 S15 1.1744 7.6018E-05 -1.2643E-07 5.1583E-09 7.0382E-11 -4.0345E-12 0.0000E+00 0.0000E+00

[0259] The optical lens of Example 14 has an FNO of 1.1. The edge field of view of the optical lens of Example 14 has an MTF value exceeding 0.64 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 14 has good imaging quality.

[0260] Example 15

[0261] Figure 15 A schematic diagram of the optical lens structure of Embodiment 15 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 29, and will not be described further.

[0262] Table 29 shows the basic parameters of each lens in the optical lens of Example 15.

[0263] Table 29

[0264]

[0265]

[0266] Table 30 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 15. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0267] Table 30

[0268] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -1.7697 -2.6786E-05 -2.4680E-08 -5.7907E-09 6.0775E-11 -1.9906E-13 0.0000E+00 0.0000E+00 S15 0.4176 8.7764E-05 -1.3450E-06 5.5338E-08 -8.4489E-10 6.8915E-12 0.0000E+00 0.0000E+00

[0269] The optical lens of Example 15 has an FNO of 1.1. The edge field of view of the optical lens of Example 15 has an MTF value exceeding 0.67 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 15 has good imaging quality.

[0270] Example 16

[0271] Figure 16 A schematic diagram of the optical lens structure of Embodiment 16 of this application is shown. The first lens L1 has negative optical power, the second lens L2 has negative optical power, the third lens L3 has positive optical power, the fourth lens L4 has negative optical power, the fifth lens L5 has positive optical power, the sixth lens L6 has positive optical power, and the seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from the data in Table 31, and will not be described further.

[0272] Table 31 shows the basic parameters of each lens in the optical lens of Example 16.

[0273] Table 31

[0274]

[0275]

[0276] Table 32 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for the aspherical surfaces S14 and S15 in Example 16. The aspherical surface shape can be limited by, but is not limited to, the formula (1) given in Example 1 above.

[0277] Table 32

[0278] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -1.0412 -9.9564E-06 -1.4339E-07 -3.4375E-09 1.9685E-11 -6.1336E-14 0.0000E+00 0.0000E+00 S15 1.1733 7.5511E-05 3.9564E-07 -3.2235E-08 7.2993E-10 -4.9168E-12 0.0000E+00 0.0000E+00

[0279] The optical lens of Example 16 has an FNO of 1.1. The edge field of view of the optical lens of Example 16 has an MTF value exceeding 0.77 at a spatial frequency of 50 lp / mm. Therefore, the optical lens provided in Example 16 has good imaging quality.

[0280] Tables 33 and 34 provide the parameter values ​​for the optical lenses in each of Examples 1 to 16. The unit of FOV is degrees (°), θ has no unit, and the units for other parameters are millimeters (mm).

[0281] Table 33

[0282] Parameters / Examples 1 2 3 4 5 6 7 8 F 17.712 17.423 17.434 17.482 17.428 17.361 17.515 17.425 ENPD 33.000 31.679 19.372 25.000 19.365 19.290 19.461 19.361 TTL 86.946 78.226 78.530 78.546 84.250 76.793 78.305 78.002 FOV 31.700 31.700 31.700 31.700 31.700 31.700 31.700 31.700 θ 0.553 0.553 0.553 0.553 0.553 0.553 0.553 0.553 H 9.374 9.391 9.400 9.402 9.390 9.410 9.377 9.425 D 34.135 31.506 27.697 27.521 26.384 23.668 25.395 27.097 BFL 7.368 9.486 8.998 12.538 16.307 15.495 11.436 6.444 F1 -187.536 -142.032 -65.499 -34.130 -27.490 -31.790 -150.665 -91.207 F2 -168.712 -138.946 -200.009 -200.347 -200.030 -200.001 -28.110 -235.465 F3 69.427 55.359 57.032 50.019 41.317 51.279 39.636 59.266 F4 -200.064 -200.038 -200.033 -123.076 -200.023 -133.241 -167.440 -166.611 F5 40.841 57.000 33.622 50.465 54.937 32.910 29.524 61.083 F6 -200.011 -200.005 -50.045 -200.027 -200.003 -41.300 -84.452 48.102 F7 45.936 37.999 37.984 26.837 40.454 28.406 45.246 -299.980

[0283] Table 34

[0284]

[0285]

[0286] In summary, the optical lenses of Examples 1 to 16 satisfy the relationships shown in Tables 35 and 36.

[0287] Table 35

[0288] Conditional / Example 1 2 3 4 5 6 7 8 (FOV×F) / H 59.8959 58.8114 58.7935 58.9395 58.8364 58.4835 59.2110 58.6087 TTL / F 4.9089 4.4897 4.5043 4.4930 4.8341 4.4232 4.4708 4.4765 TTL / H / FOV 0.2926 0.2628 0.2635 0.2635 0.2830 0.2574 0.2634 0.2611 (F×θ) / D 0.2871 0.3060 0.3483 0.3515 0.3655 0.4059 0.3816 0.3558 D / H / FOV 0.1149 0.1058 0.0929 0.0923 0.0886 0.0793 0.0854 0.0907 D / H / F 0.2056 0.1925 0.1690 0.1674 0.1612 0.1449 0.1546 0.1650 BFL / TTL 0.0847 0.1213 0.1146 0.1596 0.1936 0.2018 0.1460 0.0826 F / H 1.8895 1.8553 1.8547 1.8593 1.8560 1.8449 1.8679 1.8489 F / ENPD 0.5367 0.5500 0.9000 0.6993 0.9000 0.9000 0.9000 0.9000 F / ENPD / D 0.0157 0.0175 0.0325 0.0254 0.0341 0.0380 0.0354 0.0332 (H / 2) / (F×tan(θ / 2)) 0.9320 0.9492 0.9495 0.9471 0.9488 0.9545 0.9428 0.9525 T23 / TTL 0.1551 0.1677 0.1449 0.1253 0.1058 0.1302 0.1132 0.1282 |F6 / F| 11.2925 11.4791 2.8705 11.4420 11.4758 2.3789 4.8218 2.7606 (R14+R13) / TTL 0.2856 0.2857 0.3113 0.5396 0.4060 0.4296 0.3845 0.3783 R14 / TTL 0.1569 0.1606 0.1764 0.3831 0.2467 0.2814 0.2182 0.1632 FOV / F 1.7898 1.8194 1.8182 1.8133 1.8189 1.8259 1.8099 1.8192 T23 / T12 4.4724 4.3481 3.7770 2.8754 2.9665 1.9454 7.9716 2.4990 (1 / F1+1 / F2) / (1 / F) -0.1994 -0.2481 -0.3533 -0.5995 -0.7211 -0.6329 -0.7393 -0.2650 F3 / F 3.9198 3.1773 3.2712 2.8612 2.3707 2.9536 2.2630 3.4012 F4 / F -11.2955 -11.4810 -11.4734 -7.0402 -11.4770 -7.6746 -9.5599 -9.5617 F5 / F 2.3059 3.2715 1.9285 2.8867 3.1522 1.8956 1.6857 3.5055 R9 / R12 1.3892 1.5078 0.5732 2.0893 0.2733 0.6721 0.3601 0.7969 (F1+F2+F4) / 3F -10.4697 -9.2025 -8.9008 -6.8176 -8.1772 -7.0085 -6.5890 -9.4364 R3 / F -1.6163 -1.6147 -1.7751 -3.5447 -4.0528 -1.3130 -1.8648 -1.4330 T56 / R11 0.2489 0.3905 0.0323 0.2231 0.0340 0.0235 0.0289 0.1867 |R12 / F6| 0.0678 0.0662 0.6673 0.0685 0.4520 0.7344 0.6182 0.7639 F7 / F 2.5935 2.1809 2.1787 1.5351 2.3212 1.6362 2.5833 -17.2156

[0289] Table 36

[0290]

[0291]

[0292] The optical lenses provided in Embodiments 1-16 of this application can be used, for example, as automotive lenses. In this case, the IMA in the structural schematic diagram of the optical lenses in Embodiments 1-16 represents the imaging surface. Light from the object passes sequentially through each surface S1 to S19 and is finally imaged on the imaging surface disposed on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lenses provided in Embodiments 1-16 of this application can also be used, for example, as projection lenses or lidar transmitter lenses. In this case, the IMA in the structural schematic diagram of the optical lenses in Embodiments 1-16 can, for example, represent the light source surface. Light from the light source surface passes sequentially through each surface S19 to S1 and is finally projected onto the first side, for example, forming an image or illuminating an area on the first side.

[0293] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application, and at least one of an imaging element and a light source. The imaging element is used to convert the optical image formed by the optical lens into an electrical signal. Light emitted from the light source is projected onto a target area after passing through the optical lens to form an image or illuminate the area. When the electronic device includes an optical lens and an imaging element, it may be a standalone electronic device such as a rangefinder camera, an imaging module integrated into a rangefinder device, a standalone imaging device such as a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc., an imaging module integrated into a driver assistance system, or a lidar with at least a receiving end. When the electronic device includes an optical lens and a light source, it may be a projection module integrated into a mobile electronic device, a standalone projection device such as a projector, or a lidar with at least a transmitting end. When the electronic device includes an optical lens, an imaging element, and a light source, it may be, for example, a lidar with both a transmitting and receiving end.

[0294] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power; A second lens with negative optical power has a concave first side surface; The third lens has positive optical power, and its second side surface is convex. A fourth lens with negative optical power; The fifth lens with positive optical power has a convex first side surface; The sixth lens, which has optical power, has a convex first side and a concave second side. The seventh lens with optical power has a convex first side and a concave second side. The optical lens has seven lenses with optical power; and The optical lens satisfies the following conditions: 0.08≤T23 / TTL≤0.2, 0.24≤(R14+R13) / TTL≤0.65, and 0.05≤BFL / TTL≤0.25; Wherein, TTL is the distance from the first side of the first lens to the imaging surface of the optical lens on the optical axis, BFL is the distance from the second side of the seventh lens to the imaging surface of the optical lens on the optical axis, T23 is the distance between the second lens and the third lens on the optical axis, R13 is the radius of curvature of the first side of the seventh lens, and R14 is the radius of curvature of the second side of the seventh lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies at least one of the following: 0.15≤TTL / H / FOV×1°≤0.35;0.24≤(F×θ) / D≤0.45;0.04≤D / H / FOV×1°≤0.14;0.12mm -1 ≤D / H / F≤0.25mm -1 ;0.01mm -1 ≤F / ENPD / D≤0.06mm -1 ; Wherein, FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 55°≤(FOV×F) / H≤63°, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 3≤TTL / F≤6.5, where F is the total effective focal length of the optical lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 1.1≤F / H≤2.4, where F is the total effective focal length of the optical lens and H is the image height corresponding to the maximum field of view of the optical lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies: |F6 / F|≥1.6, where F is the total effective focal length of the optical lens and F6 is the effective focal length of the sixth lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following condition: 1° / mm ≤ FOV / F ≤ 4.5° / mm, where FOV is the maximum field of view of the optical lens and F is the total effective focal length of the optical lens.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies: 1.4≤T23 / T12≤14.5, where T12 is the distance between the first lens and the second lens on the optical axis.

9. The optical lens according to claim 1, characterized in that, The optical lens satisfies: -0.92≤(1 / F1+1 / F2) / (1 / F)<0, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens.

10. An electronic device, characterized in that, include: Optical lens according to any one of claims 1-9; as well as At least one of the imaging element and the light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal, and the light emitted by the light source is projected onto the target area after passing through the optical lens to form an image or illuminate the area.

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