Optical lens and electronic device

Abstract

This disclosure provides an optical lens and an electronic device. The optical lens, along its optical axis from a first side to a second side, sequentially includes: 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 positive optical power; a fifth lens with either positive or negative optical power, the second side of which is concave; a sixth lens with either positive or negative optical power, the first side of which is convex and the second side of which is concave; and a seventh lens with either positive or negative optical power, the first side of which is convex and the second side of which is concave. The number of lenses with optical power in the optical lens is seven. The optical lens satisfies the following: 1≤FOV / F≤3.8, 0.15≤R14 / TTL≤0.5, 3≤TTL / F≤5.5, and 2.5≤(F3+F4) / 2 / F≤7.5.

Description

Technical Field

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

[0002] With the improvement of imaging quality, optical lenses have been widely used in various fields, such as intelligent detection, security monitoring, smartphones, and automotive driver assistance systems, playing an irreplaceable role. At the same time, lens manufacturers in various fields are investing heavily in the research and development of lens performance to enhance the competitiveness of their products.

[0003] In particular, with the rapid development of automotive driver assistance systems (ADAS) and LiDAR systems, optical lenses have been widely used in these systems. For example, optical lenses play an irreplaceable role in automotive driver assistance systems such as reversing cameras, dashcams, automatic parking, panoramic parking systems, and wayfinding systems, as well as in LiDAR systems such as LiDAR transmitters and receivers. Therefore, as one of the main tools for transmitting information between vehicles and / or LiDAR systems, the market demand for the resolution of optical lenses mounted on vehicles and / or LiDAR systems is increasing.

[0004] Typically, most lens manufacturers choose to increase the number of lens elements to improve the lens's resolving power, but this significantly impacts lens miniaturization and increases costs. Furthermore, automotive driver assistance systems have high safety requirements; for more accurate signal detection, they usually need a larger amount of light to increase the field of view. However, current automotive lenses either have insufficient light intake or, while increasing light intake, introduce problems such as large CRA (Critical Area Reduction) and significant distortion. Summary of the Invention

[0005] This disclosure provides an optical lens comprising, along an optical axis from a first side to a second side: a first lens having negative optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having either positive or negative optical power, the second side of which is concave; a sixth lens having either positive or negative optical power, the first side of which is convex and the second side of which is concave; and a seventh lens having either positive or negative optical power, the first side of which is convex and the second side of which is concave. The optical lens comprises seven lenses having optical power. The optical lens can satisfy the following: 1≤FOV / F≤3.8, 0.15≤R14 / TTL≤0.5, 3≤TTL / F≤5.5 and 2.5≤(F3+F4) / 2 / F≤7.5, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, R14 is the radius of curvature of the second side of the seventh lens, TTL is the total optical length of the optical lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

[0006] In one embodiment, the first side surface of the first lens is concave, and the second side surface is convex.

[0007] In one embodiment, the first side surface of the first lens is concave, and the second side surface is concave.

[0008] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0009] In one embodiment, the first side surface of the second lens is concave, and the second side surface is convex.

[0010] In one embodiment, the first side surface of the second lens is concave, and the second side surface is also concave.

[0011] In one embodiment, the first side surface of the second lens is convex, and the second side surface is concave.

[0012] In one embodiment, the first side surface of the third lens is convex, and the second side surface is convex.

[0013] In one embodiment, the first side of the third lens is convex, and the second side is concave.

[0014] In one embodiment, the first side surface of the third lens is concave, and the second side surface is convex.

[0015] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave.

[0016] In one embodiment, the first side surface of the fourth lens is convex, and the second side surface is convex.

[0017] In one embodiment, the first side surface of the fourth lens is concave, and the second side surface is convex.

[0018] In one embodiment, the first side surface of the fifth lens is either convex or concave.

[0019] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.12≤TTL / H / FOV≤0.33, 0.1≤D / H / F≤0.25, and 0.01≤F / ENPD / D≤0.075, where TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view 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, F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens.

[0020] In one embodiment, the optical lens may satisfy at least one of the following conditions: |(HF×θ) / (F×θ)|≤0.045 and 0.9≤(H / 2) / (F×tan(θ / 2))≤1.05, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

[0021] In one embodiment, the optical lens may satisfy: 0.06≤BFL / TTL≤0.14, where BFL is the back focal length of the optical lens and TTL is the total optical length of the optical lens.

[0022] In one embodiment, the optical lens may satisfy: 1.2≤F / H≤2.3, 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.

[0023] In one embodiment, the optical lens may satisfy: -18≤F2 / F≤-2.5, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens.

[0024] In one embodiment, the optical lens may satisfy: 2≤F3 / F≤7.8, where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens.

[0025] In one embodiment, the optical lens may satisfy: T67 / TTL≤0.08, where T67 is the air gap on the optical axis between the second side surface of the sixth lens and the first side surface of the seventh lens, and TTL is the total optical length of the optical lens.

[0026] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.25≤R13 / (R14+CT7)≤1.6, 0<SAG13 / R13≤0.5, and 0<SAG14 / R14≤0.18, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, CT7 is the center thickness of the seventh lens on the optical axis, SAG13 is the sagitta of the first side of the seventh lens, and SAG14 is the sagitta of the second side of the seventh lens.

[0027] In one embodiment, the optical lens may satisfy: 0.02≤T27 / TTL≤0.2, where T27 is the air gap on the optical axis between the second side surface of the second lens and the first side surface of the seventh lens, and TTL is the total optical length of the optical lens.

[0028] In one embodiment, the optical lens may satisfy: -1.2≤(1 / F1+1 / F2) / (1 / F)≤-0.2, where F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens.

[0029] In one embodiment, the optical lens may satisfy: 0≤(T34+T45) / (CT3+CT4)≤0.45, where T34 is the air gap on the optical axis between the second side of the third lens and the first side of the fourth lens, T45 is the air gap on the optical axis between the second side of the fourth lens and the first side of the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis.

[0030] In one embodiment, the optical lens can satisfy: 0 < (1 / F5 + 1 / F6 + 1 / F7) / (1 / F) ≤ 1.1, where F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, and F is the total effective focal length of the optical lens.

[0031] In one embodiment, the first side surface of the first lens is convex, the second side surface is concave, and R1 / F ≥ 7; or, the first side surface of the first lens is concave, the second side surface is either convex or concave, and -2.5 ≤ R1 / F ≤ -0.8. R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens.

[0032] In one embodiment, the optical lens may satisfy at least one of the following conditions: T12 / TTL≤0.15, 55≤(FOV×F) / H≤63, 0.7≤F / ENPD≤1.5, -18≤F1 / F≤-1, 1≤F4 / F≤11, and 0<R11 / R12≤6, where T12 is the air gap on the optical axis between the second side surface of the first lens and the first side surface of the second lens, TTL is the total optical length of the optical lens, 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, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens.

[0033] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.009≤(T34+T45) / (CT3+CT4)≤0.31, 0.03≤SAG13 / R13≤0.35, 0.02≤SAG14 / R14≤0.13, 0.04≤(1 / F5+1 / F6+1 / F7) / (1 / F)≤0.77, 57≤(FOV×F) / H≤60, 3.2≤TTL / F≤5, 0.15≤TTL / H / FOV≤0.29, 0.11≤D / H / F≤0.2, 0.006≤|(HF×θ) / (F×θ)|≤0.038, 0.07≤BFL / TTL≤0.12, 1.4≤F / H≤2.1, 0.7≤F / ENPD≤1.1, 0.02≤ F / ENPD / D≤0.065, 0.92≤(H / 2) / (F×tan(θ / 2))≤0.98, -13.5≤F2 / F≤-3.4, 2.6≤F3 / F ≤6.3, 0.005≤T67 / TTL≤0.06, 3.2≤(F3+F4) / 2 / F≤6.4, 0.18≤R14 / TTL≤0.4, 1.4≤FOV / F≤3.1, 0.35≤R13 / (R14+CT7)≤1.4, 0.04≤T27 / TTL≤0.18, -12≤F1 / F≤-1.5, 1.8≤F4 / F≤8.5, -0.91≤(1 / F1+1 / F2) / (1 / F)≤-0.26, 0.01≤T12 / TTL≤0.13 and 0.1≤R11 / R12≤4.5, where T34 is the air gap on the optical axis between the second side of the third lens and the first side of the fourth lens, T45 is the air gap on the optical axis between the second side of the fourth lens and the first side of the fifth lens, CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, SAG13 is the sag of the first side of the seventh lens, SAG14 is the sag of the second side of the seventh lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, 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, TTL is the total optical 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 optical lens... The maximum field of view in radians; BFL is the back focal length of the optical lens; ENPD is the entrance pupil diameter of the optical lens; F2 is the effective focal length of the second lens; F3 is the effective focal length of the third lens; T67 is the air gap on the optical axis between the second side of the sixth lens and the first side of the seventh lens; F4 is the effective focal length of the fourth lens; R14 is the radius of curvature of the second side of the seventh lens; R13 is the radius of curvature of the first side of the seventh lens; CT7 is the center thickness of the seventh lens on the optical axis; T27 is the air gap on the optical axis between the second side of the second lens and the first side of the seventh lens; F1 is the effective focal length of the first lens; T12 is the air gap on the optical axis between the second side of the first lens and the first side of the second lens; R11 is the radius of curvature of the first side of the sixth lens; R12 is the radius of curvature of the second side of the sixth lens.

[0034] This disclosure also provides an electronic device including the optical lens described in the above embodiments. The electronic device further includes at least one of an imaging element and a light source. The imaging element converts the optical image 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.

[0035] The optical lens provided in this disclosure employs seven lenses. By controlling the optical power and surface shape of each lens and combining them with optical technical parameters, the lens can achieve at least one of the following beneficial effects: high resolution, miniaturization, and high light transmission. For example, by setting the first two lenses (the first and second lenses) as negative optical power lenses, the incident light can be continuously and smoothly diffused, increasing the light transmission of the optical system while reducing the imaging pressure on subsequent lenses, which is beneficial for achieving higher resolution and a smaller FNO in the system. The sixth and seventh lenses are both convex and concave in shape, which plays a role in continuously converging the light, allowing the light to converge smoothly to the imaging plane, correcting edge field aberrations, reducing the sensitivity of the rear lenses, and thus improving image quality. It is also beneficial for the rear small aperture. The optical lens also satisfies the following conditions: 1≤FOV / F≤3.8, 0.15≤R14 / TTL≤0.5, 3≤TTL / F≤5.5, and 2.5≤(F3+F4) / 2 / F≤7.5. By ensuring the optical lens satisfies the condition 2.5 ≤ (F3 + F4) / 2 / F ≤ 7.5, the focal length distribution of the third and fourth lenses can be controlled, resulting in a larger average focal length. This allows light rays diverging from the first and second lenses to converge smoothly onto the fifth lens, reducing lens sensitivity and improving resolution. Furthermore, by ensuring the optical lens satisfies the condition 0.15 ≤ R14 / TTL ≤ 0.5, a final smoothing adjustment of the light before imaging can be made, which is beneficial for correcting aberrations and improving image quality. Satisfying the condition 3 ≤ TTL / F ≤ 5.5 facilitates the miniaturization of the optical lens. Moreover, satisfying the condition 1 ≤ FOV / F ≤ 3.8 allows for high resolution while maintaining a constant image plane size. In particular, the optical lens's telephoto characteristics are advantageous for its performance in long-distance detection applications. Attached Figure Description

[0036] Other features, objects, and advantages of this disclosure will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Wherein:

[0037] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of the present disclosure is shown;

[0038] Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of the present disclosure is shown;

[0039] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of the present disclosure is shown;

[0040] Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of the present disclosure is shown;

[0041] Figure 5A schematic diagram of the structure of an optical lens according to Embodiment 5 of the present disclosure is shown;

[0042] Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of the present disclosure is shown;

[0043] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of the present disclosure is shown;

[0044] Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of the present disclosure is shown;

[0045] Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of the present disclosure is shown;

[0046] Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of the present disclosure is shown;

[0047] Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of the present disclosure is shown;

[0048] Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of the present disclosure is shown;

[0049] Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of the present disclosure is shown;

[0050] Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of the present disclosure is shown;

[0051] Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of the present disclosure is shown;

[0052] Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of the present disclosure is shown;

[0053] Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 17 of the present disclosure is shown;

[0054] Figure 18 A schematic diagram of the structure of an optical lens according to Embodiment 18 of the present disclosure is shown;

[0055] Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this disclosure is shown;

[0056] Figure 20 A schematic diagram of the structure of an optical lens according to Embodiment 20 of the present disclosure is shown;

[0057] Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 21 of the present disclosure is shown;

[0058] Figure 22 A schematic diagram of the structure of an optical lens according to Embodiment 22 of the present disclosure is shown;

[0059] Figure 23 The MTF (Modulation Transfer Function) curve of the optical lens according to Embodiment 1 of this disclosure is shown;

[0060] Figure 24 The MTF curve of the optical lens according to Embodiment 7 of this disclosure is shown;

[0061] Figure 25 The MTF curve of the optical lens according to Embodiment 8 of this disclosure is shown;

[0062] Figure 26 The MTF curve of the optical lens according to Embodiment 9 of this disclosure is shown;

[0063] Figure 27 The MTF curve of the optical lens according to Embodiment 12 of this disclosure is shown;

[0064] Figure 28 The MTF curve of the optical lens according to Embodiment 14 of this disclosure is shown;

[0065] Figure 29 The MTF curve of the optical lens according to Embodiment 17 of this disclosure is shown;

[0066] Figure 30 The MTF curve of the optical lens according to Embodiment 18 of this disclosure is shown. Detailed Implementation

[0067] To better understand this disclosure, various aspects of this disclosure will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this disclosure and are not intended to limit the scope of this disclosure 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.

[0068] 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 disclosure, the first lens discussed below may also be referred to as the second lens or the third lens.

[0069] 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 drawn strictly to scale.

[0070] 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 judging the convexity / concavity by the sign of the R value (R refers to the radius of curvature of the paraxial region). The surface of each lens closest to the first side is called the first side surface of the lens, the surface of each lens closest to the second side is called the second side surface of the lens, and the surface of the optical lens closest to the second side is called the second side surface of the optical lens. Exemplarily, the first side can be the object side and the second side can be the image side; or, the first side can be the imaging side and the second side can be the image source side. For example, when the optical lens provided in this disclosure is used for imaging, the surface of each lens closest to the subject (i.e., the first side) is called the object side surface of the lens, and the surface of each lens closest to the imaging side (i.e., the second side) is called the image side surface of the lens. Regarding the side surface of an object, when the R value is positive, it is determined to be a convex surface, and when the R value is negative, it is determined to be a concave surface; regarding the side surface of an image, when the R value is positive, it is determined to be a concave surface, and when the R value is negative, it is determined to be a convex surface.

[0071] It should be understood that the optical lens provided in this disclosure can be used for imaging, projection, and lidar imaging. When the optical lens provided in this disclosure is used as an imaging lens or 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 imaging 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 disclosure is used as a projection lens or a lidar 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.

[0072] It should also be understood that the terms "comprising," "including," 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 describing embodiments of this disclosure, the word "may" is used to mean "one or more embodiments of this disclosure." And the term "exemplary" is intended to refer to an example or illustration.

[0073] 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 disclosure pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0074] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0075] The features, principles and other aspects of this disclosure are described in detail below.

[0076] In an exemplary embodiment, the optical lens may include, for example, 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.

[0077] In an exemplary embodiment, the optical lens can be used as, for example, an imaging lens, where a first side of the optical lens can be the object side and a second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is provided with an imaging surface.

[0078] In an exemplary embodiment, the optical lens can be used as, for example, a projection lens or a lidar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is provided with the image source surface of the optical lens.

[0079] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0080] In an exemplary embodiment, an aperture stop may be provided between the third and fourth lenses or between the fourth and fifth lenses to limit light and further improve the imaging quality of the optical lens. This disclosure, by providing an aperture stop, can reduce the size of the lens element behind the aperture stop, thereby shortening the overall length of the lens, which is beneficial for effectively converging light entering the optical lens, reducing the diameter of the front lens element, and lowering the lens assembly sensitivity. However, it should be noted that the position of the aperture stop disclosed herein is merely an example and not a limitation; in alternative embodiments, the aperture stop may be placed in other positions as needed.

[0081] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a concave-convex surface. Having negative optical power allows the first lens to diverge light passing through it. Under the same field of view, light emitted from the second side of the first lens can provide a larger light-receiving surface for subsequent optical lenses, which is beneficial for increasing the aperture and achieving high luminous flux and a small F-number (FNO); it also allows for light diffusion, thereby increasing the optical path at the edge of the field of view, which is beneficial for aberration correction. The first side of the first lens is concave, which is beneficial for receiving sufficient light and for diffracting the collected light into the subsequent optical lenses as much as possible. It also effectively reduces the angle between the incident light from the edge of the field of view and the first side, improving the overall edge relative illumination of the lens. The second side of the first lens is convex, which is beneficial for smoothly transmitting the collected light to the second lens and the rear, which can help reduce lens sensitivity while ensuring sufficient light transmission.

[0082] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a convex-concave surface. Having negative optical power allows the first lens to diverge light passing through it, increasing the light aperture and facilitating high luminous flux and a small field of view (FNO). The first side surface of the first lens is convex, which helps to converge light, reducing the diameter of the received light beam and thus controlling the size of subsequent lenses (second to seventh lenses) to a certain extent, thereby facilitating lens miniaturization and cost reduction. The second side surface of the first lens is concave, which helps to smoothly direct light into the second lens, preventing steep edge light paths and improving lens resolution.

[0083] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a concave-convex shape. Having negative optical power allows the first lens to diverge light passing through it, increasing the aperture and facilitating high luminous flux and low field of view (FNO). The first lens is a biconcave lens, which can diffuse the incident light twice to adjust the light path, ensuring a smooth transition and reducing sensitivity while achieving high luminous flux and low FNO, thus improving resolution.

[0084] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a convex-concave surface. Having negative optical power and being a meniscus lens is beneficial for receiving and diffusing light emitted from the first lens. Combined with the first lens, it helps to achieve a smooth and diffused light path, which is beneficial for high light throughput and improved resolution. The first side surface of the second lens is convex, which helps to slightly converge the light diffused by the first lens. In this case, the second lens can not only adjust the light path but also control the aperture of subsequent third to seventh lenses to a certain extent, thereby achieving cost reduction. The second side surface of the second lens is concave, which helps to further diffuse the light to further achieve high light throughput of the lens, thereby increasing the lens's light transmission and contributing to a small FNO (F-number of non-optical elements).

[0085] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex surface. The negative optical power of the second lens allows it to work in conjunction with the negative optical power of the first lens to achieve a smoother, more diffused light path, which is beneficial for achieving high light throughput and improved resolution. The first concave surface of the second lens can further diffuse the light emitted from the first lens, gradually increasing the light diameter and thus further increasing the lens's light throughput, which is beneficial for achieving a small FNO (field-of-flight) resolution. The convex surface of the second 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 imaging.

[0086] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex surface. The negative optical power of the second lens, combined with the negative optical power of the first lens, achieves a smooth divergence of light rays, which is beneficial for achieving high light throughput and improving resolution. The second lens is a biconcave lens, which can further diffuse the light emitted from the first lens to rapidly increase the light diameter, thereby increasing the lens's light throughput and achieving a small FNO (field-noise ratio). Furthermore, both the first and second sides of the second lens may be relatively gently concave surfaces, which helps reduce sensitivity and alleviate the imaging pressure on subsequent lenses.

[0087] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-concave surface. Positive optical power in the third lens facilitates light convergence, allowing more light to enter the optical lens, increasing luminous flux, and converging forward-diverging light, thus improving image quality. The first side surface of the third lens is convex, which helps to slightly converge the light diffused by the first and second lenses, adjusting the light path to a slightly smoother state, thereby alleviating the resolving pressure on the edge field of view from subsequent third to seventh lenses. The second side surface of the third lens is concave, which further diffuses the light, increasing the lens's light transmission and contributing to high luminous flux and low FNO.

[0088] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a concave-convex surface. Positive optical power in the third lens facilitates light convergence, allowing more light to enter the optical lens, increasing light throughput, and converging forward-diverging light, thus improving image quality. Positive optical power in the third lens allows for appropriate pairing with the first and second lenses. The first side of the third lens is concave, which helps to further diffuse the light diffused by the first and second lenses, thereby further increasing the lens's light throughput and achieving a small FNO (field-of-flight) resolution. The second side of the third lens is convex, which helps to form the third lens as a meniscus lens, effectively softening and gradually converging the gradually diffusing light. Since the light will be resolved at the rear end of the third lens, the smooth light path helps correct edge field-of-view aberrations, thereby achieving high lens resolution.

[0089] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. The third lens is a biconvex lens, which is beneficial because both the first and second sides of the third lens can converge the forward light rays to adjust the light path. In addition, the second side is convex, which can reduce the resolving pressure on the first side and prevent the first side from being too curved (an overly curved convex surface may cause the light path at the edge of the field of view to be steep, which is not conducive to resolving).

[0090] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave surface. Having positive optical power in the fourth lens facilitates the convergence of incident light rays, compensates for the optical power of the first and second lenses with negative optical power, and allows for convergent imaging when combined with the third lens with positive optical power, thus contributing to high lens resolution. Although the increased light diffusion from the first and second lenses with negative optical power is sufficient to achieve high luminous flux and a small FNO, high resolution cannot be achieved solely by the third lens with positive optical power. Therefore, by setting the fourth lens to have positive optical power and a convex first side, it is beneficial to further converge and focus the light rays emitted from the third lens for convergent imaging. The concave second side of the fourth lens helps to soften the rapidly converging light rays, smoothing the edge field of view and correcting edge field of view aberrations.

[0091] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a concave-convex surface. The positive optical power of the fourth lens is advantageous for pairing with the third lens, which also has positive optical power, to compensate for the optical power of the first and second lenses, which have negative optical power, thereby facilitating high lens resolution. The concave first side of the fourth lens helps to slightly diffuse and soften the light converged by the third lens, preventing the edge field of view from becoming steep, thus helping to correct edge field of view aberrations and achieving high lens resolution. The convex second side of the fourth lens can be paired with the third lens to further converge the light and transmit it to the rear end for resolution. During this process, the light gradually narrows, which helps to reduce the aperture of the fifth to seventh lenses at the rear end, thereby achieving lens cost reduction and miniaturization.

[0092] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. The positive optical power of the fourth lens is advantageous for combining with a third lens that also has positive optical power to achieve converging resolution, thus contributing to high lens resolution. The fourth lens is a biconvex lens, which allows both the first and second sides of the fourth lens to converge forward light rays to adjust the light path. Furthermore, the second side being convex can reduce the resolving pressure on the first side and prevent the first side from becoming excessively curved (an excessively curved convex surface may cause steep light paths at the edges of the field of view, thus hindering resolution).

[0093] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-concave surface. Positive optical power in the fifth lens facilitates the convergence of light rays and the adjustment of their trajectory. The first side surface of the fifth lens is convex, which further reduces the converged light rays from the third and fourth lenses, decreasing the light diameter and thus reducing the aperture of the sixth and seventh lenses, further miniaturizing the lens. The second side surface of the fifth lens is concave, which helps to moderate the rapidly converging light rays, contributing to high-quality image resolution.

[0094] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a convex-concave surface. Having negative optical power and a convex first side surface is beneficial for adjusting the trajectory of edge rays, reducing sensitivity, and correcting aberrations. Furthermore, the convex first side surface of the fifth lens allows the light to be pre-convex. The concave second side surface of the fifth lens appropriately diffuses the converging light, resulting in a smoother optical path with minimal light refraction, reducing lens sensitivity, and facilitating edge field-of-view aberration correction. This reduces the imaging burden on the sixth and seventh lenses, ultimately improving the overall resolution of the lens.

[0095] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a concave-convex shape. The fifth lens is a biconcave lens, which helps to slightly diffuse and mitigate the light rays converged by the third and fourth lenses. When light exits from the fifth lens, the light rays can enter the sixth lens at a smaller angle of incidence. A smaller angle of incidence means that the resolving pressure of the sixth lens can be relieved, ultimately improving the overall resolving power of the lens and improving the image quality of the lens.

[0096] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-concave surface. Having positive optical power is beneficial for converging light and adjusting its trajectory. The sixth lens can be used in conjunction with the third and fourth lenses to perform the functions of converging and focusing light rays, reducing the resolving pressure on the third and fourth lenses, improving the lens's resolving power, and reducing the rear aperture and overall length of the lens. The first side surface of the sixth lens is convex, which further converges and focuses forward light rays, improving not only lens resolving power but also reducing the aperture of the subsequent seventh lens, thus achieving lens miniaturization. The second side surface of the sixth lens is concave, which helps to smooth the light trajectory and correct edge field-of-view aberrations, further achieving high lens resolution.

[0097] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. Having negative optical power in the sixth lens is beneficial for appropriately adjusting the light path and correcting aberrations. The first side of the sixth lens is convex and the second side is concave, which allows the first side to first converge the light, and then the second side to appropriately diffuse the light, making the entire process smooth and without significant light deflection, reducing lens sensitivity. It also facilitates edge field-of-view aberration correction, thereby helping to share the imaging burden with the fifth and seventh lenses and improving the overall resolving power of the lens.

[0098] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-concave surface. Positive optical power in the seventh lens facilitates rapid light convergence, reducing the lens's back focal length to some extent, thereby reducing the overall lens length. The first side of the seventh lens is convex, which helps to converge and focus the light emitted from the sixth lens, transmitting it to the second side for final resolution, thus contributing to miniaturization. The second side of the seventh lens is concave, which helps to smooth the final path of the forward light, allowing for a smoother transition of light to the imaging plane, avoiding abrupt changes, reducing lens sensitivity, and thus improving the resolving power of the optical lens. Preferably, the seventh lens may be an aspherical lens, and the curvature of the two sides of the seventh lens can be appropriately set to effectively correct aberrations caused by the front lens, further improving the resolving quality. Furthermore, the seventh lens may work in conjunction with the third, fourth, and sixth lenses to smooth the final path of the forward light, ultimately achieving high resolution of the lens.

[0099] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a convex-concave surface. Having negative optical power allows the seventh lens to appropriately diverge the light from the front optical lens, balancing the resolving power of each field of view and achieving low distortion. The shape of the seventh lens is crescent-shaped (e.g., its shape can approximate a concentric circle), which facilitates the smooth entry of large-aperture light rays from the front onto the imaging surface, improving the resolving power of the optical lens. Furthermore, the shape of the seventh lens, in conjunction with the shape (convex-concave) of the sixth lens, allows the light to smoothly transition to the imaging surface, balancing the resolving power of each field of view and further improving image quality. Preferably, the seventh lens may be an aspherical lens, and the curvature of its two sides can be appropriately set to effectively correct aberrations caused by the front lens, further improving resolving quality. Furthermore, the seventh lens may work in conjunction with the third, fourth, and sixth lenses to smooth the final path of the front light rays, thereby ultimately achieving high resolution of the lens.

[0100] In an exemplary embodiment, the total length (TTL) of the optical lens involved in this disclosure can be the distance along the optical axis from the center of the first side surface of the first lens to the second side surface of the optical lens. The back focal length (BFL) of the optical lens involved in this disclosure can be the distance along the optical axis from the center of the second side surface of the seventh lens to the second side surface of the optical lens. The field of view (FOV) involved in this disclosure refers to the maximum field of view of the optical lens, which is related to the image height (H) corresponding to the maximum field of view of the optical lens.

[0101] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 1 ≤ FOV / F ≤ 3.8, where FOV is the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. More specifically, FOV and F further satisfy: 1.4 ≤ FOV / F ≤ 3.1. Satisfying 1 ≤ FOV / F ≤ 3.8 is beneficial for controlling the full field of view FOV and effective focal length F of the lens within a certain proportional range, thereby achieving high resolution while maintaining the image plane size. In particular, the optical lens has telephoto characteristics, making it more effective for long-range information detection, and further, it can be applied to long-range radar detection.

[0102] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.15 ≤ R14 / TTL ≤ 0.5, where R14 is the radius of curvature of the second side surface of the seventh lens, and TTL is the total optical length of the optical lens. More specifically, R14 and TTL further satisfy: 0.18 ≤ R14 / TTL ≤ 0.4. Satisfying 0.15 ≤ R14 / TTL ≤ 0.5 is beneficial for ensuring that the radius of curvature of the second side surface of the seventh lens is positive (i.e., the surface shape is concave) and that the radius of curvature value is small. This, in turn, helps to appropriately diverge the light rays passing through the second side surface of the seventh lens, appropriately softens the trajectory of the light rays before imaging, facilitates a smooth transition of light rays to the imaging plane, corrects aberrations, and improves resolution. Furthermore, 0.15≤R14 / TTL≤0.5 can be combined with 0.06≤BFL / TTL≤0.14, which is more conducive to achieving miniaturization while ensuring resolution. Preferably, the optical lens can further satisfy at least one of the following conditions: 0.18≤R14 / TTL≤0.4 and 0.07≤BFL / TTL≤0.12, which is more conducive to the high resolution and miniaturization of the optical lens.

[0103] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 3 ≤ TTL / F ≤ 5.5, where F is the total effective focal length of the optical lens and TTL is the total optical length of the optical lens. More specifically, TTL and F can further satisfy: 3.2 ≤ TTL / F ≤ 5. Satisfying 3 ≤ TTL / F ≤ 5.5 is beneficial for achieving lens miniaturization.

[0104] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 2.5 ≤ (F3 + F4) / 2 / F ≤ 7.5, where F is the total effective focal length of the optical lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens. More specifically, F3, F4, and F can further satisfy: 3.2 ≤ (F3 + F4) / 2 / F ≤ 6.4. Satisfying 2.5 ≤ (F3 + F4) / 2 / F ≤ 7.5 is beneficial for both the third and fourth lenses to have positive optical power, and it is beneficial for controlling the focal length distribution of the third and fourth lenses, resulting in a larger average focal length value of the third and fourth lenses. This allows the light rays diverging from the second lens to converge smoothly onto the fifth lens under the action of the third and fourth lenses, reducing lens sensitivity and improving resolution. Furthermore, 2.5 ≤ (F3 + F4) / 2 / F ≤ 7.5 can be combined with 2 ≤ F3 / F ≤ 7.8 to ensure smooth light convergence, reduce light energy loss, and improve image quality. Preferably, the optical lens can further satisfy at least one of the following conditions simultaneously: 3.2≤(F3+F4) / 2 / F≤6.4 and 2.6≤F3 / F≤6.3, resulting in better high light transmission and high resolution performance. Furthermore, the three characteristics 2.5≤(F3+F4) / 2 / F≤7.5, 2≤F3 / F≤7.8, and -18≤F2 / F≤-2.5 work together to better control the light path from the second to the fourth lens, reduce light sensitivity, and ensure both high light transmission and high resolution performance. Preferably, the optical lens can further satisfy at least one of the following conditions simultaneously: 3.2≤(F3+F4) / 2 / F≤6.4, 2.6≤F3 / F≤6.3, and -13.5≤F2 / F≤-3.4, resulting in even better resolution performance.

[0105] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.12 ≤ TTL / H / FOV ≤ 0.33, where TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. More specifically, TTL, H, and FOV can further satisfy: 0.15 ≤ TTL / H / FOV ≤ 0.29. Satisfying 0.12 ≤ TTL / H / FOV ≤ 0.33 is beneficial for achieving lens miniaturization.

[0106] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.1 ≤ D / H / F ≤ 0.25, where H is the image height corresponding to the maximum field of view 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 F is the total effective focal length of the optical lens. More specifically, D, H, and F can further satisfy: 0.11 ≤ D / H / F ≤ 0.2. Satisfying 0.1 ≤ D / H / F ≤ 0.25 is beneficial for the lens to have characteristics such as a large target surface and a small aperture under the condition that the total effective focal length of the lens is constant.

[0107] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.01 ≤ F / ENPD / D ≤ 0.075, where D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. More specifically, F, ENPD, and D can further satisfy: 0.02 ≤ F / ENPD / D ≤ 0.065. Satisfying 0.01 ≤ F / ENPD / D ≤ 0.075 is beneficial for achieving characteristics such as small aperture and miniaturization of the lens while maintaining high light transmission.

[0108] In an exemplary embodiment, the optical lens according to this disclosure satisfies: |(HF×θ) / (F×θ)|≤0.045, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view of the optical lens. More specifically, H, F, and θ further satisfy: 0.006≤|(HF×θ) / (F×θ)|≤0.038. Satisfying |(HF×θ) / (F×θ)|≤0.045 helps to make the overall distortion of the lens close to 0, thereby ensuring that the angular resolution of the lens is nearly consistent across the entire image height, achieving high-quality imaging.

[0109] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.9 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.05, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view of the optical lens. More specifically, H, F, and θ further satisfy: 0.92 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 0.98. Satisfying 0.9 ≤ (H / 2) / (F×tan(θ / 2)) ≤ 1.05 allows the optical lens to possess characteristics such as low distortion and high resolution by controlling the ratio of the actual image height to the ideal image height.

[0110] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.06 ≤ BFL / TTL ≤ 0.14, where BFL is the back focal length of the optical lens and TTL is the total optical length of the optical lens. More specifically, BFL and TTL further satisfy: 0.07 ≤ BFL / TTL ≤ 0.12. Satisfying 0.06 ≤ BFL / TTL ≤ 0.14 is beneficial for the lens to have a shorter back focal length, which in turn facilitates lens miniaturization and a smaller incident angle of the principal ray on the imaging plane. This ensures high response sensitivity of the receiving chip (located on the imaging plane), ultimately achieving superior detection performance of the optical lens (such as a lidar).

[0111] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 1.2 ≤ F / H ≤ 2.3, 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. More specifically, F and H further satisfy: 1.4 ≤ F / H ≤ 2.1. Satisfying 1.2 ≤ F / H ≤ 2.3 is beneficial for controlling the total effective focal length and image height of the lens within a certain range, which helps the optical lens to have a large image plane and telephoto characteristics, thereby improving resolution.

[0112] In an exemplary embodiment, the optical lens according to this disclosure satisfies: -18 ≤ F2 / F ≤ -2.5, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens. More specifically, F2 and F can further satisfy: -13.5 ≤ F2 / F ≤ -3.4. Satisfying -18 ≤ F2 / F ≤ -2.5 is beneficial for the lens to simultaneously possess characteristics such as high light throughput and high resolution. Specifically, by reasonably allocating the optical power of the second lens, the second lens can have a negative optical power, which allows the light already diffused by the first lens to smoothly transition to the second lens and allows the second lens to further diffuse the light emitted by the first lens, thereby increasing the amount of light entering the lens and achieving a small FNO. In addition, the effective focal length of the second lens can be controlled within a relatively large range to ensure high resolution of the lens. For example, if the effective focal length of the second lens is too small, the diffused light will diffuse further and rapidly, and the light path will become steep, making it difficult to achieve high resolution of the lens. Furthermore, -18≤F2 / F≤-2.5 can be combined with 2.5≤(F3+F4) / 2 / F≤7.5 to ensure that the diverging light rays from the first and second lenses converge smoothly to the fifth lens, reducing light energy loss, lowering lens sensitivity, and alleviating the imaging pressure on subsequent lenses, thereby facilitating high resolution. Preferably, the optical lens can further satisfy at least one of the following conditions simultaneously: -13.5≤F2 / F≤-3.4 and 3.2≤(F3+F4) / 2 / F≤6.4, resulting in even better light transmission and final imaging performance.

[0113] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 2≤F3 / F≤7.8, where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens. More specifically, F3 and F further satisfy: 2.6≤F3 / F≤6.3. Satisfying 2≤F3 / F≤7.8 helps to control the effective focal length of the third lens within a reasonable range, which in turn helps the third lens adjust the refraction angle of the light transmitted through the second lens, allowing the light to converge smoothly after passing through the second lens, reducing the degree of light refraction, and improving resolution. Furthermore, -18≤F2 / F≤-2.5 can be combined with 2≤F3 / F≤7.8 to ensure that the diffused light passing through the second lens converges smoothly, with a relatively small light refraction angle, which helps to ensure high light transmission while reducing sensitivity and improving resolution. Preferably, the optical lens can further satisfy at least one of the following conditions: -13.5≤F2 / F≤-3.4 and 2.6≤F3 / F≤6.3, which improves the high light transmission and high resolution performance of the optical lens.

[0114] In an exemplary embodiment, the optical lens according to this disclosure satisfies: T67 / TTL ≤ 0.08, where T67 is the air gap on the optical axis between the second side surface of the sixth lens and the first side surface of the seventh lens, and TTL is the total optical length of the optical lens. More specifically, T67 and TTL further satisfy: 0.005 ≤ T67 / TTL ≤ 0.06. Satisfying T67 / TTL ≤ 0.08 is beneficial for having a smaller air gap between the sixth and seventh lenses, allowing the light converged by the sixth lens to be rapidly transmitted to the seventh lens in a converging manner within this smaller gap for final imaging. Furthermore, the smaller air gap makes the sixth and seventh lenses more compact, thereby facilitating lens miniaturization.

[0115] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.25 ≤ R13 / (R14+CT7) ≤ 1.6, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, and CT7 is the center thickness of the seventh lens on the optical axis. More specifically, R13, R14, and CT7 further satisfy: 0.35 ≤ R13 / (R14+CT7) ≤ 1.4. Satisfying 0.25 ≤ R13 / (R14+CT7) ≤ 1.6 is beneficial for making the seventh lens a meniscus lens convex towards the first side, with a shape approximately concentric circles. Combined with the sixth lens, this can smooth the final path of forward light rays, correct aberrations, and ultimately achieve high resolution of the lens.

[0116] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0.02 ≤ T27 / TTL ≤ 0.2, where T27 is the air gap on the optical axis between the second side surface of the second lens and the first side surface of the seventh lens, and TTL is the total optical length of the optical lens. More specifically, T27 and TTL further satisfy: 0.04 ≤ T27 / TTL ≤ 0.18. Satisfying 0.02 ≤ T27 / TTL ≤ 0.2 is beneficial for having a smaller air gap between the second and seventh lenses, allowing the light rays emitted by the second lens to be rapidly and converged within this smaller gap before being transmitted to the seventh lens for final imaging. Furthermore, the smaller air gap makes the structure between the second and seventh lenses more compact, thereby facilitating lens miniaturization.

[0117] In an exemplary embodiment, the optical lens according to this disclosure satisfies: -1.2 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -0.2, where F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. More specifically, F1, F2, and F further satisfy: -0.91 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -0.26. Satisfying -1.2 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -0.2 is beneficial for both the first and second lenses to have negative optical power. By controlling the optical power of the second lens, the light entering the lens can be further diffused after passing through the first and second lenses to increase the lens's light transmission. At the same time, adjusting the light path after passing through the first and second lenses to make it smoother is beneficial for correcting aberrations in the edge field of view and achieving high-resolution imaging of the lens.

[0118] In an exemplary embodiment, the optical lens according to this disclosure satisfies: T12 / TTL ≤ 0.15, where T12 is the air gap on the optical axis between the second side surface of the first lens and the first side surface of the second lens, and TTL is the total optical length of the optical lens. More specifically, T12 and TTL can further satisfy: 0.01 ≤ T12 / TTL ≤ 0.13. Satisfying T12 / TTL ≤ 0.15 allows the air gap between the first lens and the second lens to be controlled within a reasonable range, enabling light passing through the first lens to smoothly enter the second lens, reducing the imaging pressure on the rear optical lens, improving image quality, and simultaneously facilitating the use of small apertures for both the first and second lenses.

[0119] In an exemplary embodiment, the optical lens according to this disclosure 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. More specifically, FOV, F, and H can further satisfy: 57 ≤ (FOV × F) / H ≤ 60. Satisfying 55 ≤ (FOV × F) / H ≤ 63 allows the lens to have a larger angular resolution (positively correlated with H under unit angle conditions), which is beneficial for improving lens resolution.

[0120] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 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. More specifically, F and ENPD further satisfy: 0.7 ≤ F / ENPD ≤ 1.1. Satisfying 0.7 ≤ F / ENPD ≤ 1.5 is beneficial for the lens to have a small FNO, which is beneficial for increasing light transmission, increasing the entrance pupil diameter, and helping to improve relative illumination. In particular, it helps the optical lens to better capture objects at a distance.

[0121] In an exemplary embodiment, the optical lens according to this disclosure satisfies: -18 ≤ F1 / F ≤ -1, where F is the total effective focal length of the optical lens and F1 is the effective focal length of the first lens. More specifically, F1 and F may further satisfy: -12 ≤ F1 / F ≤ -1.5. Satisfying -18 ≤ F1 / F ≤ -1 facilitates the first lens to have a negative optical power and helps control the focal length value of the first lens, thereby increasing the amount of light entering the lens, achieving a small FNO, and simultaneously making the light path after passing through the first lens smoother, reducing the degree of light deflection, and improving resolution.

[0122] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 1 ≤ F4 / F ≤ 11, where F is the total effective focal length of the optical lens and F4 is the effective focal length of the fourth lens. More specifically, F4 and F further satisfy: 1.8 ≤ F4 / F ≤ 8.5. Satisfying 1 ≤ F4 / F ≤ 11 is beneficial for the fourth lens to have positive optical power and for controlling the focal length value of the fourth lens. This facilitates adjusting the refraction angle of light transmitted through the third lens, allowing the light to converge smoothly after passing through the fourth lens, reducing the degree of light refraction, and improving resolution.

[0123] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0 < R11 / R12 ≤ 6, where R11 is the radius of curvature of the first side of the sixth lens, and R12 is the radius of curvature of the second side of the sixth lens. More specifically, R11 and R12 further satisfy: 0.1 ≤ R11 / R12 ≤ 4.5. Satisfying 0 < R11 / R12 ≤ 6 is beneficial for making the sixth lens a meniscus lens convex towards the first side, allowing light to be appropriately converged and smoothly transitioned when passing through the sixth lens, thereby reducing the resolving pressure on the sixth and seventh lenses and facilitating both miniaturization and high lens resolution.

[0124] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0 < SAG13 / R13 ≤ 0.5, where R13 is the radius of curvature of the first side surface of the seventh lens, and SAG13 is the sag of the first side surface of the seventh lens, i.e., SAG13 is the distance on the optical axis from the intersection of the first side surface of the seventh lens and the optical axis to the vertex of the effective radius of the first side surface of the seventh lens. More specifically, SAG13 and R13 can further satisfy: 0.03 ≤ SAG13 / R13 ≤ 0.35. Satisfying 0 < SAG13 / R13 ≤ 0.5 allows for the control of the final light path of the lens by reasonably controlling the ratio of the sag of the first side surface of the seventh lens to the radius of curvature, enabling the light to converge smoothly to the imaging plane, which is beneficial for improving resolution.

[0125] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0 < SAG14 / R14 ≤ 0.18, where R14 is the radius of curvature of the second side surface of the seventh lens, and SAG14 is the sag of the second side surface of the seventh lens, i.e., the distance from the intersection of the second side surface of the seventh lens and the optical axis to the vertex of the effective radius of the second side surface of the seventh lens on the optical axis. More specifically, SAG14 and R14 further satisfy: 0.02 ≤ SAG14 / R14 ≤ 0.13. Satisfying 0 < SAG14 / R14 ≤ 0.18 allows for the control of the final light path of the lens by reasonably controlling the ratio of the sag of the second side surface of the seventh lens to the radius of curvature, enabling the light to converge smoothly to the imaging plane, which is beneficial for improving resolution. Furthermore, the seventh lens can be a convex-concave aspherical lens. The radius of curvature of the lens changes trendwise from the center to the edge, which can balance the aberrations of lenses in different fields of view and improve image quality. Furthermore, 0 < SAG13 / R13 ≤ 0.5 can be combined with 0 < SAG14 / R14 ≤ 0.18, which is more conducive to aberration correction and thus better imaging effect. Preferably, the optical lens can further satisfy at least one of the following conditions: 0.03 ≤ SAG13 / R13 ≤ 0.35 and 0.02 ≤ SAG14 / R14 ≤ 0.13, which is conducive to achieving high resolution. Furthermore, it can also be combined with 0 < R11 / R12 ≤ 6 and / or 0.06 ≤ BFL / TTL ≤ 0.14. The sixth and seventh lenses are both convex and concave in shape, and their curvature radii are controlled. On the one hand, this is conducive to the smoother convergence of light to the imaging plane, correcting aberrations and improving resolution. On the other hand, it is conducive to achieving small aperture and miniaturization at the rear end. Preferably, the optical lens can further satisfy at least one of the following conditions: 0.1≤R11 / R12≤4.5 and 0.07≤BFL / TTL≤0.12, so that the optical lens has better resolution and miniaturization.

[0126] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0 ≤ (T34 + T45) / (CT3 + CT4) ≤ 0.45, where T34 is the air gap on the optical axis between the second side of the third lens and the first side of the fourth lens, T45 is the air gap on the optical axis between the second side of the fourth lens and the first side of the fifth lens, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. More specifically, T34, T45, CT3, and CT4 further satisfy: 0.009 ≤ (T34 + T45) / (CT3 + CT4) ≤ 0.31. Satisfying 0 ≤ (T34 + T45) / (CT3 + CT4) ≤ 0.45 allows for relatively small air gaps between the third and fourth lenses, and between the fourth and fifth lenses. This allows for better coordination with the third and fourth lenses, which have positive optical power, enabling progressive convergence of light rays over a shorter path. This facilitates aberration correction and miniaturization of the system. Furthermore, 0 ≤ (T34 + T45) / (CT3 + CT4) ≤ 0.45 can be combined with 2.5 ≤ (F3 + F4) / 2 / F ≤ 7.5 to ensure that diverging light rays from the first and second lenses converge smoothly to the fifth lens. This reduces the sensitivity of the fifth lens and lessens the imaging burden on subsequent lenses, thus contributing to high resolution. Preferably, the optical lens can further satisfy at least one of the following conditions simultaneously: 0.009 ≤ (T34 + T45) / (CT3 + CT4) ≤ 0.31 and 3.2 ≤ (F3 + F4) / 2 / F ≤ 6.4, resulting in even better final imaging performance.

[0127] In an exemplary embodiment, the optical lens according to this disclosure satisfies: 0 < (1 / F5 + 1 / F6 + 1 / F7) / (1 / F) ≤ 1.1, where F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, and F is the total effective focal length of the optical lens. More specifically, F5, F6, F7, and F further satisfy: 0.04 ≤ (1 / F5 + 1 / F6 + 1 / F7) / (1 / F) ≤ 0.77. Satisfying 0 < (1 / F5 + 1 / F6 + 1 / F7) / (1 / F) ≤ 1.1 allows for reasonable control of the optical power ratio of the fifth to seventh lenses, enabling light to converge smoothly to the imaging plane and reasonably controlling the light path, which is beneficial to improving the imaging stability of the optical lens.

[0128] In an exemplary embodiment, the first side surface of the first lens is convex, and the second side surface is concave. The optical lens according to this disclosure satisfies: R1 / F ≥ 7, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens. More specifically, R1 and F further satisfy: 11 ≤ R1 / F ≤ 26. By setting the first side surface of the first lens to be convex and controlling its radius of curvature to be relatively large, this disclosure can ensure light collection while further controlling the size of subsequent second to seventh lenses, thereby facilitating system miniaturization and cost reduction.

[0129] In an exemplary embodiment, the first side surface of the first lens is concave, and the second side surface is either convex or concave. The optical lens according to this disclosure satisfies: -2.5 ≤ R1 / F ≤ -0.8, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens. More specifically, R1 and F further satisfy: -2.2 ≤ R1 / F ≤ -1.1. This disclosure, by setting the first side surface of the first lens to be concave and reasonably controlling the ratio of its radius of curvature to the total focal length of the lens, facilitates the collection of more light, allowing it to enter the rear optical system in a divergent manner. This facilitates achieving a small focal length non-noise (FNO). Furthermore, it effectively reduces the angle between the incident edge field-of-view light and the first side surface, improving the overall edge relative illumination of the lens. In an exemplary embodiment, as needed, the optical lens of this disclosure may further include a filter and / or protective glass disposed between the seventh lens and the second side surface of the optical lens to filter light of different wavelengths and prevent damage to components (e.g., chips) on the second side of the optical lens.

[0130] In an exemplary embodiment, the first to seventh lenses can be spherical lenses or aspherical lenses. Exemplarily, the first to sixth lenses can be spherical lenses, and the seventh lens can be an aspherical lens. This disclosure does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when image quality is a primary concern. Specifically, to improve the resolving quality of the optical lens, the first, second, third, fourth, fifth, sixth, and seventh lenses can all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens 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 lens aberrations and improve resolving power. By setting the seventh lens as an aspherical lens, this disclosure allows the seventh lens to have different curvatures at different positions, which in turn helps to adjust the direction of light rays to converge on the image plane, thus better correcting aberrations and improving resolution.

[0131] The optical lens according to the above embodiments of this disclosure, through the rational setting of the shape and power of each lens, achieves at least one beneficial effect such as miniaturization, high resolution, low distortion, high luminous flux, low FNO, small aperture, low sensitivity, low cost, and good image quality using only 7 lenses. This optical lens can also effectively control back focus shift when used in high and low temperature environments, thus adapting to more demanding operating conditions. Simultaneously, this optical lens facilitates a significant reduction in its overall length, achieving lens miniaturization and enabling assembly in space-constrained applications in specialized fields.

[0132] In an exemplary embodiment, the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh lens can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving lens stability. Simultaneously, using glass avoids image blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. Specifically, when resolution and reliability are paramount, the first to seventh lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to seventh lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0133] 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 disclosure. For example, although seven lenses have been 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.

[0134] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0135] It should be noted that the optical lenses provided in Embodiments 1 to 21 of this disclosure can all achieve good imaging quality, and their modulation transfer function curves are relatively similar. Therefore, this disclosure only shows the MTF curves of Embodiments 1, 7-9, 12, 14 and 17 by way of example. The MTF curves of other embodiments are not shown one by one, and those skilled in the art should also be able to know them based on the content of this disclosure.

[0136] Example 1

[0137] The following is for reference Figure 1 The optical lens according to Embodiment 1 of this disclosure is described. Figure 1A schematic diagram of the structure of an optical lens according to Embodiment 1 of this disclosure is shown.

[0138] like Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis: first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6 and seventh lens L7.

[0139] 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 positive optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has negative optical power, with its first side surface S10 being convex and its second side surface S11 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.

[0140] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4 to improve image quality. Optionally, 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. The filter L8 can be used to correct color aberrations, and the protective glass L9 can be used to protect the image sensor chip IMA located on the second side surface of the optical lens.

[0141] The optical lens provided in this disclosure can be used, for example, as an imaging lens, in which light from an object sequentially passes through each surface S1 to S19 and is finally imaged onto a second side surface (i.e., an imaging surface) disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this disclosure can also be used, for example, as a projection lens or a lidar transmitter lens, in which light from the image source side sequentially passes through each surface S19 to S1 and is finally projected onto a first side surface (i.e., a projection surface, not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0142] Table 1 shows the basic parameters of the optical lens of Example 1, where the radius of curvature and thickness / distance are in millimeters (mm).

[0143] Table 1

[0144] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -35.5392 10.0103 1.67 47.29 S2 -81.3459 9.0100 S3 -19.7472 9.8711 1.67 47.29 S4 -28.3553 0.0984 S5 100.7497 7.9829 1.90 31.32 S6 -125.6199 9.3644 STO infinity -9.2744 S8 25.1244 9.1316 1.67 47.29 S9 45.4589 0.0797 S10 21.1603 5.4900 1.85 23.79 S11 17.2030 1.4729 S12 17.0739 5.8660 1.90 31.32 S13 13.4685 1.4637 S14 13.2822 9.2576 1.68 30.71 S15 25.7513 3.2196 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0145] In Embodiment 1, the first side surface S14 and the second side surface S15 of the seventh lens L7 are aspherical surfaces, and the surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0146]

[0147] 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 and A16 that can be used for the aspherical surfaces S14 and S15 in Example 1.

[0148] Table 2

[0149]

[0150] The FNO of the optical lens in Example 1 is 0.7. From Figure 23 As can be seen, the MTF value of the edge field of view of the optical lens of Example 1 is 0.67 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 1 has good imaging quality.

[0151] Example 2

[0152] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this disclosure is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this disclosure is shown. Table 3 shows the basic parameters of the optical lens of Embodiment 2, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0153] like Figure 2 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 3, and for the sake of simplicity, it will not be described in detail here.

[0154] Table 3

[0155] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -20.7730 8.0049 1.67 47.29 S2 -37.5589 3.0019 S3 -135.0060 5.0022 1.67 47.29 S4 199.0000 3.0049 S5 68.2563 9.8535 1.90 31.32 S6 -84.6963 3.1540 STO infinity -3.0544 S8 18.3430 5.8560 1.67 47.29 S9 27.1363 0.0885 S10 20.5541 4.9945 1.85 23.79 S11 16.8876 1.3842 S12 18.7902 5.7030 1.90 31.32 S13 15.0558 0.3261 S14 12.0519 10.0084 1.68 30.71 S15 18.8311 2.3819 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0156] Table 4 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 2.

[0157] Table 4

[0158]

[0159] The optical lens of Example 2 has an FNO of 0.9. The MTF value of the edge field of view of the optical lens of Example 2 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.51. Therefore, the optical lens given in Example 2 has good imaging quality.

[0160] Example 3

[0161] The following is for reference Figure 3 The optical lens according to Embodiment 3 of this disclosure is described. Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this disclosure is shown. Table 5 shows the basic parameters of the optical lens of Embodiment 3, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0162] like Figure 3 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 5, and for the sake of simplicity, it will not be described in detail here.

[0163] Table 5

[0164]

[0165]

[0166] Table 6 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 3.

[0167] Table 6

[0168] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.2386 -1.8433E-05 -4.8926E-07 8.1365E-09 -7.7557E-11 -1.1120E-12 9.4297E-15 0.0000E+00 S15 4.2569 4.1827E-05 -1.2628E-06 1.0231E-07 -1.0576E-08 3.5678E-10 -5.5899E-12 0.0000E+00

[0169] The optical lens of Example 3 has an FNO of 0.9. The MTF value of the edge field of view of the optical lens of Example 3 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.7. Therefore, the optical lens provided in Example 3 has good image quality.

[0170] Example 4

[0171] The following is for reference Figure 4 The optical lens according to Embodiment 4 of this disclosure is described. Figure 4A schematic diagram of the structure of an optical lens according to Embodiment 4 of this disclosure is shown. Table 7 shows the basic parameters of the optical lens of Embodiment 4, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0172] like Figure 4 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 7, and for the sake of simplicity, it will not be described in detail here.

[0173] Table 7

[0174]

[0175]

[0176] Table 8 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 4.

[0177] Table 8

[0178] Face number k A4 A6 A8 A10 A12 A14 A16 S14 1.9432 -3.3388E-05 -1.5965E-07 5.1990E-09 -6.0130E-11 3.2719E-13 -7.1742E-16 0.0000E+00 S15 -2.7979 2.0172E-04 -5.3980E-07 2.1606E-07 -5.5208E-09 5.9998E-11 2.8835E-13 0.0000E+00

[0179] The optical lens of Example 4 has an FNO of 0.7. The MTF value of the edge field of view of the optical lens of Example 4 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.67. Therefore, the optical lens given in Example 4 has good image quality.

[0180] Example 5

[0181] The following is for reference Figure 5 The optical lens according to Embodiment 5 of this disclosure is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this disclosure is shown. Table 9 shows the basic parameters of the optical lens of Embodiment 5, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0182] like Figure 5 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 9, and for the sake of simplicity, it will not be described in detail here.

[0183] Table 9

[0184] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -30.3642 10.0001 1.67 47.29 S2 -48.9207 3.1800 S3 -18.7201 4.9994 1.67 47.29 S4 -30.0474 0.0996 S5 56.3381 5.6667 1.90 31.32 S6 292.1984 0.3977 STO infinity 0.4912 S8 -199.0000 4.9996 1.67 47.29 S9 -61.6516 0.1010 S10 23.7150 6.3689 1.85 23.79 S11 18.1476 0.0969 S12 16.6519 10.0004 1.90 31.32 S13 55.6102 2.0801 S14 19.9494 9.9943 1.68 30.71 S15 14.5253 2.7320 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0185] Table 10 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 5.

[0186] Table 10

[0187] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -1.3372 -3.6924E-05 -5.4997E-07 1.1245E-08 -3.4918E-10 4.9171E-12 -2.6461E-14 0.0000E+00 S15 3.5787 -5.2926E-05 1.4889E-06 -2.9859E-07 1.8613E-08 -6.0246E-10 7.4131E-12 0.0000E+00

[0188] The optical lens of Example 5 has an FNO of 1.1. The edge field of view of the optical lens of Example 5 has an MTF value of 0.73 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 5 has good image quality.

[0189] Example 6

[0190] The following is for reference Figure 6 The optical lens according to Embodiment 6 of this disclosure is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this disclosure is shown. Table 11 shows the basic parameters of the optical lens of Embodiment 6, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0191] like Figure 6 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 11, and for the sake of simplicity, it will not be described in detail here.

[0192] Table 11

[0193] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -20.7716 8.0002 1.67 47.29 S2 -56.1819 1.4943 S3 -101.3767 4.7501 1.67 47.29 S4 155.9132 1.3122 S5 143.9431 8.0003 1.90 31.32 S6 -82.4556 -0.5941 STO infinity 2.0993 S8 23.3414 10.0010 1.67 47.29 S9 55.0433 1.5098 S10 20.8213 5.0929 1.85 23.79 S11 17.0759 1.5160 S12 14.5868 6.5002 1.90 31.32 S13 27.4793 0.7323 S14 18.8917 7.1732 1.68 30.71 S15 14.6465 4.5462 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0194] Table 12 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 6.

[0195] Table 12

[0196] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -2.2343 -5.8225E-05 -1.0415E-06 9.9613E-09 -3.0051E-11 -5.2869E-13 5.2115E-15 0.0000E+00 S15 -1.4324 8.1660E-05 -3.0332E-07 -1.6530E-08 3.0869E-09 -9.0007E-11 9.1968E-13 0.0000E+00

[0197] 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 of 0.73 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 6 has good image quality.

[0198] Example 7

[0199] The following is for reference Figure 7 The optical lens according to Embodiment 7 of this disclosure is described. Figure 7A schematic diagram of the structure of an optical lens according to Embodiment 7 of this disclosure is shown. Table 13 shows the basic parameters of the optical lens of Embodiment 7, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0200] like Figure 7 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 13, and for the sake of simplicity, it will not be described in detail here.

[0201] Table 13

[0202]

[0203]

[0204] Table 14 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 7.

[0205] Table 14

[0206] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -1.2103 -2.3498E-05 -3.0501E-07 4.4874E-09 -3.9083E-11 1.9021E-13 -3.7130E-16 0.0000E+00 S15 0.1608 -1.5372E-06 1.6220E-06 -2.7005E-08 1.9762E-10 5.1742E-12 -5.2299E-14 0.0000E+00

[0207] The FNO of the optical lens in Example 7 is 0.7. From Figure 24 As can be seen, the MTF value of the edge field of view of the optical lens of Example 7 is 0.68 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 7 has good imaging quality.

[0208] Example 8

[0209] The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this disclosure. For example... Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this disclosure is shown. Table 15 shows the basic parameters of the optical lens of Embodiment 8, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0210] like Figure 8 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 15, and for the sake of simplicity, it will not be described in detail here.

[0211] Table 15

[0212] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -21.6550 8.0001 1.67 47.29 S2 -67.0054 1.4667 S3 -87.0950 4.7500 1.67 47.29 S4 198.9994 1.4999 S5 160.2250 8.0001 1.90 31.32 S6 -81.4904 0.0602 STO infinity 1.4399 S8 23.3543 7.6553 1.67 47.29 S9 51.0365 1.5179 S10 20.2259 5.1739 1.85 23.79 S11 16.5328 1.5010 S12 15.0436 6.9187 1.90 31.32 S13 21.1080 0.9188 S14 14.6614 8.6335 1.68 30.71 S15 15.7234 4.4899 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0213] Table 16 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 8.

[0214] Table 16

[0215]

[0216]

[0217] The FNO of the optical lens in Example 8 is 1.1. From Figure 25 As can be seen, the MTF value of the edge field of view of the optical lens of Example 8 is 0.73 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 8 has good imaging quality.

[0218] Example 9

[0219] The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this disclosure. For example... Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this disclosure is shown. Table 17 shows the basic parameters of the optical lens of Embodiment 9, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0220] like Figure 9 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 17, and for the sake of simplicity, it will not be described in detail here.

[0221] Table 17

[0222] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -29.2911 9.9990 1.67 47.29 S2 -55.0053 2.6121 S3 -18.8466 7.3525 1.67 47.29 S4 -30.2557 0.0996 S5 78.9406 4.9999 1.90 31.32 S6 -513.6046 0.0689 STO infinity 0.5384 S8 -198.9961 4.9999 1.67 47.29 S9 -63.0306 0.0997 S10 22.4299 7.3682 1.85 23.79 S11 17.5183 0.3415 S12 17.5494 10.0007 1.90 31.32 S13 40.9495 2.2267 S14 19.3185 10.0013 1.68 30.71 S15 17.2163 3.3126 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0223] Table 18 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 9.

[0224] Table 18

[0225] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.6360 -2.6625E-05 -6.6262E-07 1.7238E-08 -3.6602E-10 3.9875E-12 -1.7690E-14 0.0000E+00 S15 5.8809 -9.0182E-05 2.0744E-06 -3.9029E-07 1.8278E-08 -4.4562E-10 3.4306E-12 0.0000E+00

[0226] The FNO of the optical lens in Example 9 is 1.1. From Figure 26 As can be seen, the MTF value of the edge field of view of the optical lens of Example 9 is 0.76 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 9 has good imaging quality.

[0227] Example 10

[0228] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this disclosure is described. For example... Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this disclosure is shown. Table 19 shows the basic parameters of the optical lens of Embodiment 10, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0229] like Figure 10 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 19, and for the sake of simplicity, it will not be described in detail here.

[0230] Table 19

[0231] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -26.6748 8.5459 1.75 37.50 S2 93.8608 3.5979 S3 -216.9187 8.8367 1.71 53.87 S4 54.2630 2.7699 S5 90.9213 5.8754 1.74 44.90 S6 -74.0457 0.5573 S7 56.0580 7.2706 1.74 44.90 S8 -152.4581 0.0993 STO infinity 0.1003 S10 30.8544 9.8360 1.73 51.49 S11 95.9510 1.4159 S12 20.0930 9.9663 1.50 81.61 S13 13.9499 3.6629 S14 16.3806 10.0028 1.59 60.53 S15 31.5217 2.6298 S16 infinity 1.1000 1.52 64.17 S17 infinity 3.1473 S18 infinity 0.5000 1.52 64.17 S19 infinity 1.8264 IMA / /

[0232] Table 20 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 10.

[0233] Table 20

[0234] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.6854 -2.5896E-05 -3.1669E-07 1.7586E-10 -2.8224E-11 1.4040E-13 -1.5754E-16 0.0000E+00 S15 0.5202 -1.6267E-05 -9.2009E-07 4.0953E-09 -1.0887E-10 2.5862E-12 -1.6567E-14 0.0000E+00

[0235] 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 of 0.5 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 10 has good image quality.

[0236] Example 11

[0237] The following is for reference Figure 11 An optical lens according to embodiment 11 of this disclosure is described. For example... Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this disclosure is shown. Table 21 shows the basic parameters of the optical lens of Embodiment 11, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0238] like Figure 11 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 21, and for the sake of simplicity, it will not be described in detail here.

[0239] Table 21

[0240]

[0241]

[0242] Table 22 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 11.

[0243] Table 22

[0244] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.4626 -1.8192E-05 -2.8348E-07 7.1330E-10 -3.9496E-11 2.5718E-13 -9.9057E-16 0.0000E+00 S15 1.0806 -1.1971E-05 -6.5897E-07 -8.8014E-09 1.5197E-12 1.7522E-12 -1.5772E-14 0.0000E+00

[0245] 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 of 0.51 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 11 has good image quality.

[0246] Example 12

[0247] The following is for reference Figure 12 Describes an optical lens according to Embodiment 12 of this disclosure. For example... Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this disclosure is shown. Table 23 shows the basic parameters of the optical lens of Embodiment 12, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0248] like Figure 12 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 23, and for the sake of simplicity, it will not be described in detail here.

[0249] Table 23

[0250] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -26.0089 4.7965 1.90 31.32 S2 -43.6041 4.0379 S3 -17.7037 4.2517 1.85 23.79 S4 -30.8656 0.0981 S5 -68.9051 4.9982 1.85 23.79 S6 -39.0876 0.1923 S7 -198.9999 5.1926 1.90 31.32 S8 -45.7641 0.1987 STO infinity 0.0060 S10 24.2977 8.0033 1.85 23.79 S11 51.6970 1.9941 S12 20.2691 8.0039 1.90 31.32 S13 14.8210 3.4943 S14 16.5596 8.0133 1.81 40.66 S15 23.4139 2.0946 S16 infinity 1.1000 1.52 54.09 S17 infinity 2.7016 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.2277 IMA / /

[0251] Table 24 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 12.

[0252] Table 24

[0253] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.7181 -2.6153E-05 -2.4063E-07 -6.1645E-10 -1.6663E-11 9.5541E-14 0.0000E+00 0.0000E+00 S15 -0.3951 -1.3451E-07 -1.3986E-06 3.6016E-08 -7.0063E-10 5.3730E-12 0.0000E+00 0.0000E+00

[0254] The optical lens of Example 12 has an FNO of 0.9. From Figure 27 As can be seen, the MTF value of the edge field of view of the optical lens of Example 12 is 0.71 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 12 has good imaging quality.

[0255] Example 13

[0256] The following is for reference Figure 13 An optical lens according to embodiment 13 of this disclosure is described. For example... Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this disclosure is shown. Table 25 shows the basic parameters of the optical lens of Embodiment 13, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0257] like Figure 13 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 25, and for the sake of simplicity, it will not be described in detail here.

[0258] Table 25

[0259] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -37.4864 10.0001 1.76 40.11 S2 -139.4611 10.0001 S3 -20.0842 3.8073 1.50 62.09 S4 -49.5536 6.0071 S5 535.6423 9.7165 1.74 44.90 S6 -61.7800 0.4646 S7 45.2177 6.7388 1.74 44.90 S8 -4423.4651 0.1000 STO infinity 0.0992 S10 23.8358 9.4383 1.74 44.90 S11 201.9630 0.1075 S12 201.2569 8.0588 1.76 40.11 S13 45.2094 1.4145 S14 35.9901 10.0002 1.68 30.71 S15 25.0203 2.7868 S16 infinity 1.1000 1.52 64.17 S17 infinity 2.2520 S18 infinity 0.5000 1.52 64.17 S19 infinity 1.6790 IMA / /

[0260] Table 26 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 13.

[0261] Table 26

[0262] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -7.2799 -1.8067E-05 -1.6182E-07 3.6747E-09 -4.2414E-11 2.9330E-13 -8.5774E-16 0.0000E+00 S15 5.3264 -3.7823E-05 5.9933E-07 -6.7278E-09 1.4927E-10 -2.0676E-13 -1.4131E-14 0.0000E+00

[0263] The optical lens of Example 13 has an FNO of 0.9. The MTF value of the edge field of view of the optical lens of Example 13 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.64. Therefore, the optical lens given in Example 13 has good image quality.

[0264] Example 14

[0265] The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this disclosure. For example... Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this disclosure is shown. Table 27 shows the basic parameters of the optical lens of Embodiment 14, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0266] like Figure 14 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 27, and for the sake of simplicity, it will not be described in detail here.

[0267] Table 27

[0268]

[0269]

[0270] Table 28 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 14.

[0271] Table 28

[0272] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -6.1338 -2.2508E-05 -2.2568E-07 3.9950E-09 -3.9649E-11 2.2856E-13 -5.3561E-16 0.0000E+00 S15 1.8738 -2.8523E-05 1.8796E-07 3.9632E-09 -4.5089E-12 1.3910E-12 -1.7484E-14 0.0000E+00

[0273] The optical lens of Example 14 has an FNO of 0.9. From Figure 28 As can be seen, the MTF value of the edge field of view of the optical lens of Example 14 is 0.64 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 14 has good image quality.

[0274] Example 15

[0275] The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this disclosure. For example... Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this disclosure is shown. Table 29 shows the basic parameters of the optical lens of Embodiment 15, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0276] like Figure 15 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 29, and for the sake of simplicity, it will not be described in detail here.

[0277] Table 29

[0278] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -31.3160 8.0000 1.52 52.19 S2 250.0000 8.0000 S3 -19.2949 3.3764 1.59 61.25 S4 -34.1826 5.0000 S5 599.8442 9.8292 1.74 44.90 S6 -62.6161 4.0000 S7 46.1706 5.9840 1.74 44.90 S8 29614.6295 -0.0011 STO infinity 0.1049 S10 23.8535 8.8862 1.74 44.90 S11 97.4800 1.0000 S12 101.5771 8.2342 1.74 44.90 S13 55.6928 1.0000 S14 33.8524 9.6604 1.68 30.71 S15 23.8358 2.5380 S16 infinity 1.1000 1.52 64.17 S17 infinity 2.5428 S18 infinity 0.5000 1.52 64.17 S19 infinity 2.4832 IMA / /

[0279] Table 30 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 15.

[0280] Table 30

[0281] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -5.9287 -2.1684E-05 -2.0027E-07 3.7567E-09 -3.8419E-11 2.4289E-13 -6.6089E-16 0.0000E+00 S15 1.8936 -3.2451E-05 5.5761E-07 -8.8697E-10 -6.2840E-11 4.1898E-12 -4.2846E-14 0.0000E+00

[0282] The optical lens of Example 15 has an FNO of 0.9. The edge field of view of the optical lens of Example 15 has an MTF of 0.6 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 15 has good image quality.

[0283] Example 16

[0284] The following is for reference Figure 16 Describes an optical lens according to Embodiment 16 of this disclosure. For example... Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this disclosure is shown. Table 31 shows the basic parameters of the optical lens of Embodiment 16, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0285] like Figure 16 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has negative optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 31, and for the sake of simplicity, it will not be described in detail here.

[0286] Table 31

[0287] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -38.2639 10.0034 1.76 26.61 S2 -121.9880 10.0001 S3 -20.2701 5.7534 1.60 60.60 S4 -47.7930 5.9880 S5 -297.3553 5.5095 1.74 44.90 S6 -58.0477 2.4323 S7 53.9304 6.0926 1.74 44.90 S8 -240.0000 0.1000 STO infinity 0.1003 S10 23.6823 8.6903 1.74 44.90 S11 124.0578 1.0330 S12 134.1485 8.7824 1.76 26.61 S13 54.4528 1.0000 S14 30.4975 9.5757 1.68 30.71 S15 21.6484 2.4581 S16 infinity 1.1000 1.52 64.17 S17 infinity 2.6219 S18 infinity 0.5000 1.52 64.17 S19 infinity 2.5629 IMA / /

[0288] Table 32 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 16.

[0289] Table 32

[0290] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -3.9578 -1.6899E-05 -1.8200E-07 3.2067E-09 -3.5610E-11 2.2529E-13 -5.6563E-16 0.0000E+00 S15 2.8469 -2.4064E-05 1.1818E-07 1.5833E-10 6.4819E-11 1.0808E-12 -1.7484E-14 0.0000E+00

[0291] The optical lens of Example 16 has an FNO of 0.9. The MTF value of the edge field of view of the optical lens of Example 16 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.67. Therefore, the optical lens given in Example 16 has good image quality.

[0292] Example 17

[0293] The following is for reference Figure 17 Describes an optical lens according to Embodiment 17 of this disclosure. For example... Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 17 of this disclosure is shown. Table 33 shows the basic parameters of the optical lens of Embodiment 17, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0294] like Figure 17As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 33, and for the sake of simplicity, it will not be described in detail here.

[0295] Table 33

[0296] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -20.2633 3.9986 1.90 31.32 S2 -46.6295 0.9297 S3 -115.5127 3.9993 1.85 23.79 S4 281.3708 3.0256 S5 -150.6276 4.9985 1.85 23.79 S6 -40.1163 0.1955 S7 38.9848 8.0005 1.90 31.32 S8 81.1407 1.3851 STO infinity 0.6165 S10 23.5521 7.9925 1.85 23.79 S11 35.8659 1.9926 S12 22.7911 7.9956 1.90 31.32 S13 46.4439 1.9044 S14 20.4266 7.9971 1.81 40.66 S15 14.9630 2.2600 S16 infinity 1.1000 1.52 54.09 S17 infinity 2.2406 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.2277 IMA / /

[0297] Table 34 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 17.

[0298] Table 34

[0299] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -2.3013 -1.0447E-05 -7.2365E-07 1.0956E-08 -1.2834E-10 5.8932E-13 0.0000E+00 0.0000E+00 S15 1.8411 -2.1757E-05 -1.5887E-06 1.1842E-07 -3.9074E-09 4.8163E-11 0.0000E+00 0.0000E+00

[0300] The optical lens of Example 17 has an FNO of 0.9. From Figure 29 As can be seen, the MTF value of the edge field of view of the optical lens of Example 17 is 0.73 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 17 has good image quality.

[0301] Example 18

[0302] The following is for reference Figure 18 Describes an optical lens according to Embodiment 18 of this disclosure. For example... Figure 18 A schematic diagram of the structure of an optical lens according to Embodiment 18 of this disclosure is shown. Table 35 shows the basic parameters of the optical lens of Embodiment 18, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0303] like Figure 18 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 35, and for the sake of simplicity, it will not be described in detail here.

[0304] Table 35

[0305]

[0306]

[0307] Table 36 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 18.

[0308] Table 36

[0309] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -3.8162 -1.1360E-05 -2.0921E-07 4.2972E-09 -4.0237E-11 1.4465E-13 0.0000E+00 0.0000E+00 S15 1.0352 -1.2376E-05 -2.6172E-08 5.2898E-08 -1.3526E-09 1.2517E-11 0.0000E+00 0.0000E+00

[0310] The optical lens of Example 18 has an FNO of 0.9. From Figure 30 As can be seen, the MTF value of the edge field of view of the optical lens of Example 18 is 0.71 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 18 has good image quality.

[0311] Example 19

[0312] The following is for reference Figure 19 Describes an optical lens according to Embodiment 19 of this disclosure. For example... Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this disclosure is shown. Table 37 shows the basic parameters of the optical lens of Embodiment 19, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0313] like Figure 19 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has negative optical power. The surface shape of each lens can be obtained from Table 37, and for the sake of simplicity, it will not be described in detail here.

[0314] Table 37

[0315] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 200.4392 3.9733 1.69 54.86 S2 79.6641 6.5222 S3 -18.2591 8.0958 1.73 54.68 S4 -37.8090 2.3468 S5 88.9893 8.0189 1.63 35.71 S6 -199.0000 2.0194 S7 34.3314 8.0390 1.69 53.35 S8 78.0204 1.3917 STO infinity -1.2265 S10 24.6562 8.0778 1.83 37.23 S11 41.3127 2.1718 S12 20.8213 7.8461 1.75 52.32 S13 36.8930 0.6812 S14 19.2046 8.0994 1.81 40.66 S15 13.9413 2.2965 S16 infinity 1.1000 1.52 54.09 S17 infinity 2.1997 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.2277 IMA / /

[0316] Table 38 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 19.

[0317] Table 38

[0318] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -2.9847 -7.6672E-06 -3.8300E-07 1.8523E-09 -1.2690E-11 6.5523E-14 0.0000E+00 0.0000E+00 S15 1.8254 -3.6522E-05 -1.8926E-06 5.9428E-08 -9.6803E-10 5.5547E-12 0.0000E+00 0.0000E+00

[0319] The optical lens of Example 19 has an FNO of 0.9. The MTF value of the edge field of view of the optical lens of Example 19 at a spatial frequency of 50 lp / mm (line pairs / mm) is 0.61. Therefore, the optical lens given in Example 19 has good image quality.

[0320] Example 20

[0321] The following is for reference Figure 20 An optical lens according to embodiment 20 of this disclosure is described. For example... Figure 20A schematic diagram of the structure of an optical lens according to Embodiment 20 of this disclosure is shown. Table 39 shows the basic parameters of the optical lens of Embodiment 20, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0322] like Figure 20 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 39, and for the sake of simplicity, it will not be described in detail here.

[0323] Table 39

[0324] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -27.6226 4.0660 1.67 47.29 S2 -49.1873 2.5120 S3 -19.2382 6.6823 1.67 47.29 S4 -31.6886 0.1407 S5 78.3164 5.0013 1.90 31.32 S6 -199.0000 -0.1590 STO infinity 1.4484 S8 -198.7272 5.0130 1.67 47.29 S9 -63.4468 0.0997 S10 22.5965 7.3906 1.85 23.79 S11 17.6476 0.9945 S12 17.9494 9.8293 1.90 31.32 S13 39.6326 2.3134 S14 19.1868 10.0020 1.68 30.71 S15 16.9059 3.4612 S16 infinity 1.1000 1.52 54.09 S17 infinity 0.5000 S18 infinity 0.5000 1.52 54.09 S19 infinity 0.5000 IMA / /

[0325] Table 40 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 20.

[0326] Table 40

[0327] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.6650 -2.7136E-05 -6.6228E-07 1.8205E-08 -3.6837E-10 3.7547E-12 -1.5275E-14 0.0000E+00 S15 5.5141 -9.0058E-05 1.7654E-06 -3.7296E-07 1.8111E-08 -4.5154E-10 3.6383E-12 0.0000E+00

[0328] The optical lens of Example 20 has an FNO of 1.1. The edge field of view of the optical lens of Example 20 has an MTF of 0.76 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 20 has good image quality.

[0329] Example 21

[0330] The following is for reference Figure 21 Describes an optical lens according to embodiment 21 of this disclosure. For example... Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 21 of this disclosure is shown. Table 41 shows the basic parameters of the optical lens of Embodiment 21, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0331] like Figure 21 As 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 positive optical power. The fifth lens L5 has negative optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 41, and for the sake of simplicity, it will not be described in detail here.

[0332] Table 41

[0333]

[0334]

[0335] Table 42 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 21.

[0336] Table 42

[0337] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.9857 -3.7245E-05 -9.2320E-07 5.7505E-09 -9.1181E-11 -7.1202E-13 1.3239E-14 0.0000E+00 S15 2.1764 9.1740E-05 4.4325E-07 -6.7138E-08 2.1544E-09 -4.6162E-11 8.6663E-13 0.0000E+00

[0338] The optical lens of Example 21 has an FNO of 1.1. The edge field of view of the optical lens of Example 21 has an MTF value of 0.69 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens given in Example 21 has good imaging quality.

[0339] Example 22

[0340] The following is for reference Figure 22 Describes an optical lens according to embodiment 22 of this disclosure. For example... Figure 22 A schematic diagram of the structure of an optical lens according to Embodiment 22 of this disclosure is shown. Table 43 shows the basic parameters of the optical lens of Embodiment 22, wherein the units of radius of curvature and thickness / distance are millimeters (mm).

[0341] like Figure 22 As 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 positive optical power. The fifth lens L5 has positive optical power. The sixth lens L6 has positive optical power. The seventh lens L7 has positive optical power. The surface shape of each lens can be obtained from Table 43, and for the sake of simplicity, it will not be described in detail here.

[0342] Table 43

[0343]

[0344]

[0345] Table 44 provides the conic coefficients and higher-order coefficients that can be used for each aspherical surface in Example 22.

[0346] Table 44

[0347] Face number k A4 A6 A8 A10 A12 A14 A16 S14 -0.94913 1.5337E-05 -2.5077E-07 -6.3474E-09 1.7480E-10 -3.5518E-12 1.9906E-14 0.0000E+00 S15 3.5034 -6.9463E-05 -1.7155E-06 -6.8291E-08 -1.4636E-09 6.6756E-11 -1.2549E-12 0.0000E+00

[0348] The optical lens of Example 22 has an FNO of 1.1. The edge field of view of the optical lens of Example 22 has an MTF value of 0.74 at a spatial frequency of 50 lp / mm (line pairs / mm). Therefore, the optical lens provided in Example 22 has good image quality.

[0349] Tables 45-1, 45-2, and 45-3 show the basic parameters of the optical lenses in Examples 1 to 22, such as F, FNO, ENPD, TTL, FOV, θ, H, D, SAG13, SAG14, BFL, F1, F2, F3, F4, F5, F6, and F7. The units for F, ENPD, TTL, H, D, SAG13, SAG14, BFL, F1, F2, F3, F4, F5, F6, and F7 are millimeters (mm), and the unit for FOV is degrees (°).

[0350] Table 45-1

[0351] Parameters / Examples 1 2 3 4 5 6 7 F 17.5091 17.3322 17.3181 17.4073 17.2077 17.4176 17.5217 FNO 0.7000 0.9000 0.9000 0.7000 1.1000 1.1000 0.7000 ENPD 25.0129 19.2580 19.2423 24.8675 15.6434 15.8342 25.0310 TTL 75.6437 62.3094 71.9909 79.0021 63.8079 64.7337 78.0017 FOV 31.7000 31.7000 31.7000 31.7000 31.7000 31.7000 31.7000 θ 0.5533 0.5533 0.5533 0.5533 0.5533 0.5533 0.5533 H 9.4038 9.4333 9.4411 9.4316 9.4625 9.4193 9.4038 D 31.9506 25.3438 26.0328 31.8518 21.1336 20.5675 31.2952 BFL 5.8196 4.9819 6.2600 5.6929 5.3320 7.1462 6.8496 F1 -106.4782 -88.2276 -88.5985 -105.5081 -156.6522 -55.7788 -65.0483 F2 -182.7469 -123.3134 -233.7296 -158.9729 -92.6652 -94.0514 -146.2636 F3 65.8785 45.1558 92.4678 50.2107 80.0068 61.7748 69.9443 F4 73.6107 69.1720 31.2175 64.6555 135.8029 55.5970 86.2552 F5 -299.9582 -300.0001 -63.2890 -72.4459 -196.7410 -300.0000 -208.2658 F6 -299.9909 -300.0000 -292.8153 28.4292 24.6229 29.2138 36.8499 F7 32.6130 32.5239 32.5964 -53.3960 -299.9989 -299.9673 299.9876 SAG13 3.6239 2.4414 3.5810 1.6712 1.3647 1.3081 2.5363 SAG14 1.0276 0.9793 1.5546 1.8858 1.1414 1.3490 1.5430

[0352] Table 45-2

[0353]

[0354]

[0355] Table 45-3

[0356] Parameters / Examples 15 16 17 18 19 20 21 22 F 17.5844 17.5284 17.3122 17.4843 17.2852 19.0862 13.6291 17.3929 FNO 0.9000 0.9000 0.9000 0.9000 0.9000 1.1000 1.1000 1.1000 ENPD 19.5383 19.4760 19.2358 19.4271 19.2058 17.3511 12.3901 15.8118 TTL 82.2383 84.3038 61.3600 71.4729 72.3809 61.3954 58.8877 78.7397 FOV 31.7000 31.7000 31.7000 31.7000 31.7000 28.6000 41.0000 31.7000 θ 0.5533 0.5533 0.5533 0.5533 0.5533 0.4992 0.7156 0.5533 H 9.3897 9.3983 9.4404 9.4062 9.4385 9.4526 9.3866 9.4129 D 27.3718 27.7895 23.7820 24.8012 26.2739 21.0471 17.9800 26.1130 BFL 9.1640 9.2429 6.3283 7.9123 6.3239 6.0612 6.0471 7.9211 F1 -55.2395 -81.2952 -44.6747 -62.8810 -200.0321 -104.9430 -40.3306 -112.0551 F2 -84.5019 -65.2189 -102.1173 -65.5107 -60.4626 -95.7165 -79.5719 -60.8744 F3 79.3975 99.4221 67.1393 94.2693 103.6457 65.6872 62.4528 108.6636 F4 64.3497 61.8188 79.9455 68.2716 85.2794 141.6631 56.1095 99.3257 F5 41.8401 39.3111 66.7031 63.8318 62.8141 -299.4661 -300.0003 85.0329 F6 -185.5004 -133.1082 44.8485 68.9203 54.3492 31.4279 33.2384 199.2220 F7 -199.7390 -199.9567 -199.9997 -200.0002 -200.0079 299.9968 50.0436 36.9707 SAG13 1.3271 1.6273 1.6315 1.6199 1.7007 1.7111 2.1909 2.8235 SAG14 1.3608 1.5000 1.3600 1.3624 1.3965 1.0994 1.2396 1.3533

[0357] In summary, Examples 1 to 22 satisfy the relationships shown in Tables 46-1, 46-2 and 46-3 respectively.

[0358] Table 46-1

[0359]

[0360]

[0361] Table 46-2

[0362] Conditional / Example 8 9 10 11 12 13 14 (FOV×F) / H 58.3778 58.1984 59.0262 59.2100 58.4260 59.0972 59.2023 TTL / F 3.7229 3.8455 4.6717 4.8467 3.4508 4.8089 4.6438 TTL / H / FOV 0.2163 0.2227 0.2744 0.2856 0.2006 0.2828 0.2736 D / H / F 0.1268 0.1285 0.1589 0.1631 0.1422 0.1684 0.1692 |(HF×θ) / (F×θ)| 0.0186 0.0156 0.0294 0.0324 0.0194 0.0305 0.0323 BFL / TTL 0.1097 0.0888 0.1126 0.0935 0.1106 0.0987 0.0881 F / H 1.8416 1.8359 1.8620 1.8678 1.8431 1.8643 1.8676 F / ENPD 1.1000 1.1000 0.9000 0.9000 0.9000 0.9000 0.9000 F / ENPD / D 0.0530 0.0523 0.0345 0.0335 0.0387 0.0324 0.0323 (H / 2) / (F×tan(θ / 2)) 0.9562 0.9592 0.9457 0.9428 0.9555 0.9446 0.9429 F2 / F -5.3467 -5.9596 -3.5538 -5.6271 -3.4970 -4.1526 -5.3318 F3 / F 3.6629 4.5958 3.2926 3.3326 6.0659 4.4257 4.8339 T67 / TTL 0.0142 0.0334 0.0448 0.0514 0.0583 0.0168 0.0123 (F3+F4) / 2 / F 3.5563 6.3451 3.2992 3.3020 4.9864 3.9900 3.9900 R14 / TTL 0.2433 0.2584 0.3856 0.3045 0.3909 0.2969 0.2801 FOV / F 1.8261 1.8298 1.8117 1.8075 1.8261 1.8089 1.8068 R13 / (R14+CT7) 0.6019 0.7098 0.3945 0.4114 0.5269 1.0259 0.9969 T27 / TTL 0.1074 0.0507 0.1053 0.1434 0.0999 0.0972 0.0948 F1 / F -3.0542 -6.5845 -1.5935 -1.6055 -4.9254 -4.1609 -4.2537 F4 / F 3.4497 8.0944 3.3058 3.2713 3.9068 3.5542 3.1460 (1 / F1+1 / F2) / (1 / F) -0.5144 -0.3197 -0.9089 -0.8006 -0.4890 -0.4811 -0.4226 T12 / TTL 0.0227 0.0392 0.0440 0.0499 0.0674 0.1187 0.0982 R11 / R12 0.7127 0.4286 1.4404 1.4363 1.3676 4.4517 4.4346 R1 / F -1.2475 -1.6908 -1.5245 -1.6211 -1.4982 -2.1391 -1.9214 (T34+T45) / (CT3+CT4) 0.1928 0.0707 0.0576 0.1790 0.0390 0.0403 0.0450 SAG13 / R13 0.1344 0.0842 0.1556 0.2072 0.1269 0.0343 0.0353 SAG14 / R14 0.0805 0.0610 0.0253 0.0361 0.0387 0.0484 0.0457 (1 / F5+1 / F6+1 / F7) / (1 / F) 0.5981 0.5876 0.5630 0.5221 0.6135 0.1720 0.1326

[0363] Table 46-3

[0364]

[0365]

[0366] This disclosure also provides an electronic device including an optical lens as described in the exemplary embodiments above and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element is disposed on a second side of the optical lens, for example, on an imaging surface on the second side, and may be, for example, a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0367] This disclosure also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above, with the light source located on a second side of the optical lens. Light emitted from the light source is projected onto a target area on a first side of the optical lens after passing through the lens, forming an image or illuminating an area in the target area.

[0368] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this disclosure 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-described features with (but not limited to) technical features in this disclosure that have similar functions.

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; A third lens with positive optical power; A fourth lens with positive optical power; A fifth lens having positive or negative optical power, the second side of which is concave; A sixth lens having positive or negative optical power, wherein its first side surface is convex and its second side surface is concave; and A seventh lens having positive or negative optical power has a first side surface that is convex and a second side surface that is concave. The optical lens has seven lenses with optical power. The optical lens satisfies the following conditions: 1≤FOV / F≤3.8, 0.15≤R14 / TTL≤0.5, 3≤TTL / F≤5.5, and 2.5≤(F3+F4) / 2 / F≤7.5, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, R14 is the radius of curvature of the second side surface of the seventh lens, TTL is the total optical length of the optical lens, F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

2. The optical lens according to claim 1, wherein, The first side surface of the first lens is concave, and the second side surface is convex; or... The first side surface of the first lens is concave, and the second side surface is concave; or... The first side of the first lens is convex, and the second side is concave.

3. The optical lens according to claim 1, wherein, The first side surface of the second lens is concave, and the second side surface is convex; or, the first side surface of the second lens is concave, and the second side surface is concave; or, the first side surface of the second lens is convex, and the second side surface is concave. The third lens has a first convex surface and a second convex surface; or, the third lens has a first convex surface and a second concave surface; or, the third lens has a first concave surface and a second convex surface; and The first side of the fourth lens is convex and the second side is concave; or, the first side of the fourth lens is convex and the second side is convex; or, the first side of the fourth lens is concave and the second side is convex.

4. The optical lens of claim 1, wherein, The first side surface of the fifth lens is either convex or concave.

5. The optical lens of any of claims 1-4, wherein, The optical lens satisfies at least one of the following conditions: 0.12≤TTL / H / FOV≤0.33, 0.1≤D / H / F≤0.25 and 0.01≤F / ENPD / D≤0.075, where H is the image height corresponding to the maximum field of view 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 ENPD is the entrance pupil diameter of the optical lens.

6. The optical lens according to any one of claims 1-4, wherein, The optical lens satisfies at least one of the following conditions: |(HF×θ) / (F×θ)|≤0.045 and 0.9≤(H / 2) / (F×tan(θ / 2))≤1.05, where 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.

7. The optical lens according to any one of claims 1-4, wherein, The optical lens satisfies the following condition: 0.06≤BFL / TTL≤0.14, where BFL is the back focal length of the optical lens.

8. The optical lens according to any one of claims 1-4, wherein, The optical lens satisfies the following condition: 1.2≤F / H≤2.3, where H is the image height corresponding to the maximum field of view of the optical lens.

9. The optical lens according to any one of claims 1-4, wherein, The optical lens satisfies the following condition: -18≤F2 / F≤-2.5, where 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 to 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 formed by the optical lens into an electrical signal. 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.

Images