Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment. The optical lens sequentially comprises a first lens with negative focal power, a second lens with focal power, a third lens with positive focal power, a fourth lens with focal power, a fifth lens with focal power, a sixth lens with focal power and a seventh lens with focal power from a first side to a second side along an optical axis. The first side surface of the first lens is a concave surface; the first side surface and the second side surface of the third lens are convex surfaces. At least one of the fourth lens, the fifth lens and the sixth lens has positive focal power, and at least one of the fourth lens, the fifth lens and the sixth lens has negative focal power. The number of the lenses with focal power in the optical lens is seven. The optical lens satisfies the following conditions: 0 < = d12 / F < = 0.045, 0 < = d67 / TTL < = 0.06, and 0.01 < = (1 / F4 + 1 / F5 + 1 / F6 + 1 / F7) / (1 / F) < = 1.5.

Description

Technical Field

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

[0002] In recent years, advanced driver assistance systems (ADAS) have become increasingly popular among users, leading to a growing demand for automotive cameras used to acquire information about the vehicle's external environment. Automotive cameras are optical lenses installed in automobiles to perform various functions, including, for example, interior cameras, rearview cameras, front-view cameras, side-view cameras, and surround-view cameras. For instance, the front-view camera is an indispensable key component for realizing ADAS (Advanced Driver Assistance Systems) and autonomous driving functions.

[0003] High resolution and miniaturization are the core competitive qualities of automotive lenses. However, to meet the needs of specific application scenarios, forward-looking lenses must be able to clearly image targets at medium to long distances. Achieving medium to long distance imaging usually requires a longer focal length in optical design, resulting in a larger size for the forward-looking lens and making miniaturization impossible. Furthermore, to conceal the lens during installation, a smaller front aperture is often necessary. Additionally, due to the complexity of actual road conditions, the forward-looking lens needs good object recognition capabilities, thus placing high demands on its resolution. Summary of the Invention

[0004] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along the optical axis, a first lens with positive optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with optical power, a fifth lens with optical power, a sixth lens with optical power, and a seventh lens with optical power. The first lens has a concave first side surface; the third lens has a convex first side surface and a convex second side surface. At least one of the fourth, fifth, and sixth lenses has positive optical power, and at least one lens has negative optical power. The number of lenses with optical power in the optical lens is seven. The optical lens satisfies: 0 ≤ d12 / F ≤ 0.045, 0 ≤ d67 / TTL ≤ 0.06, and 0.01 ≤ |(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)| ≤ 1.5.

[0005] According to an exemplary embodiment of this application, the second side surface of the first lens is concave or convex.

[0006] According to an exemplary embodiment of this application, the second lens has negative optical power, a first side surface of the second lens is concave, and a second side surface of the second lens is convex; or, the second lens has negative optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is concave; or, the second lens has positive optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is concave; or, the second lens has positive optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is convex.

[0007] According to an exemplary embodiment of this application, the fourth lens has negative optical power, with a first side surface that is concave and a second side surface that is concave; or, the fourth lens has negative optical power, with a first side surface that is convex and a second side surface that is concave; or, the fourth lens has positive optical power, with a first side surface that is convex and a second side surface that is concave; or, the fourth lens has positive optical power, with a first side surface that is convex and a second side surface that is convex.

[0008] According to an exemplary embodiment of this application, the fifth lens has negative optical power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave; or, the fifth lens has negative optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave; or, the fifth lens has positive optical power, the first side surface of the fifth lens is convex.

[0009] According to an exemplary embodiment of this application, the sixth lens has negative optical power, a first side surface of the sixth lens is concave, and a second side surface of the sixth lens is convex; or, the sixth lens has negative optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave; or, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave; or, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is convex; or, the sixth lens has positive optical power, a first side surface of the sixth lens is concave, and a second side surface of the sixth lens is convex.

[0010] According to an exemplary embodiment of this application, the seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is concave; or, the seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex; or, the seventh lens has positive optical power, the first side of the seventh lens is convex, and the second side of the seventh lens is concave.

[0011] According to an exemplary embodiment of this application, the first to seventh lenses are all glass spherical lenses.

[0012] According to an exemplary embodiment of the present application, the third lens and the fourth lens are cemented to form a cemented lens; alternatively, the fourth lens and the fifth lens are cemented to form a cemented lens; alternatively, the fifth lens and the sixth lens are cemented to form a cemented lens.

[0013] According to an exemplary embodiment of the present application, the optical lens further includes an aperture stop, and the aperture stop is located between the second lens and the third lens.

[0014] According to an exemplary embodiment of the present application, the central distance L (L1~STO) from the first side surface of the first lens to the center of the aperture stop on the optical axis and the total optical length TTL of the optical lens satisfy: 0.05 ≤ L (L1~STO) / TTL ≤ 0.165.

[0015] According to an exemplary embodiment of the present application, for the seventh lens, when the first side surface of the seventh lens is convex or the second side surface is concave, the sagittal height is positive and satisfies: Sag(D / 2) / n > Sag(D / 2) / (n + 1); when the first side surface of the seventh lens is concave or the second side surface is convex, the sagittal height is negative and satisfies: Sag(D / 2) / n < Sag(D / 2) / (n + 1); where Sag(D / 2) / n is the sagittal height at one nth of the optical axis towards the edge direction, and Sag(D / 2) / (n + 1) is the sagittal height at one (n + 1)th of the optical axis towards the edge direction.

[0016] According to an exemplary embodiment of the present application, the focal length value F2 of the second lens and the overall focal length value F of the optical lens satisfy: 0.5 ≤ |F2 / F| ≤ 6.

[0017] According to an exemplary embodiment of the present application, the focal length value F4 of the fourth lens and the overall focal length value F of the optical lens satisfy: -3 ≤ F4 / F ≤ 13.

[0018] According to an exemplary embodiment of the present application, the central thickness d1 of the first lens and the overall focal length value F of the optical lens satisfy: 0.02 ≤ d1 / F ≤ 0.18.

[0019] According to an exemplary embodiment of the present application, the radius of curvature R11 of the first side surface of the first lens and the overall focal length value F of the optical lens satisfy: -1.4 ≤ R11 / F ≤ -0.6.

[0020] According to an exemplary embodiment of the present application, the radius of curvature R71 of the first side surface of the seventh lens and the overall focal length value F of the optical lens satisfy: 0.2 ≤ |R71 / F| ≤ 1.5.

[0021] According to an exemplary embodiment of this application, the optical back focal length (BFL) of the optical lens and the optical total length (TTL) of the optical lens satisfy the following condition: 0.02 ≤ BFL / TTL ≤ 0.115.

[0022] According to an exemplary embodiment of this application, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy: -10≤F1 / F≤-0.3.

[0023] According to an exemplary embodiment of this application, the focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy: -2≤F7 / F≤55.

[0024] According to an exemplary embodiment of this application, the air gap d67 between the sixth and seventh lenses and the total focal length F of the optical lens satisfy: 0 ≤ d67 / F ≤ 0.125.

[0025] According to an exemplary embodiment of this application, the center thickness d2 of the second lens and the center thickness d3 of the third lens satisfy: 0.1≤d2 / d3≤1.

[0026] According to an exemplary embodiment of this application, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens and the maximum effective aperture D72 of the second side of the seventh lens corresponding to the maximum field of view of the optical lens satisfy: 1≤D11 / D72≤1.3.

[0027] According to an exemplary embodiment of this application, the optical lens satisfies any one of the following relationships: 0≤|(HF*θ) / (F*θ)|≤0.05, 0.06≤D11 / H / F*1mm≤0.085, 1.5≤TTL / F≤2.5, 0.02≤d2 / F≤0.2, 0≤d12 / TTL≤0.02, -0.3≤SAG11 / (D11 / 2)≤-0.1, 0.2≤|F2 / F3|≤4.5 , 0.01≤(d12+d67) / F3≤0.25, 0.2≤F3 / F≤2, 0.05≤|(1 / F1+1 / F2)*TTL|≤2.5, 0.1≤L(L1~STO) / F≤0.4 , 1.6≤F / H≤1.8, -2.5≤R11 / D11≤-0.5, -0.7≤R11 / TTL≤-0.2, 50°≤(FOV×F) / H≤65°, 5≤TTL / H / θ≤7, 1. 6≤F / ENPD≤1.9, 0.25≤D11 / TTL≤0.4, 0.1≤|SAG71 / (D71 / 2)|≤0.4, 0.2≤(d3+d4+d5+d6) / TL≤0.8, 0 .7≤D11 / Dmax(L2~L7)≤1.1, -0.1≤SAG11 / F≤-0.02, 0.005≤|F / F5|≤3, 0.001≤|F / F6|≤2.5, 0.05≤(d 23+d34+d56) / F≤0.8, 0.01≤d23 / F≤0.65, 0.05≤d23 / F≤0.65. For the first to sixth lenses, when the first side surface is convex or the second side surface is concave, the sagitta is positive, satisfying Sag(D / 2) / n>Sag(D / 2) / (n+1). For the first to sixth lenses, when the first side surface is concave or the second side surface is convex, the sagitta is negative, satisfying Sag(D / 2) / n. <Sag(D / 2) / (n+1)。H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D11 is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, d2 is the center thickness of the second lens, SAG11 is the sag corresponding to the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F1 is the focal length of the first lens, L (L1~STO) is the center distance on the optical axis from the first side of the first lens to the aperture stop, R11 is the radius of curvature of the first side of the first lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and SAG71 is the image height corresponding to the maximum effective aperture of the first side of the seventh lens corresponding to the maximum field of view of the optical lens. Sag, D71 is the maximum effective aperture of the first side of the seventh lens corresponding to the maximum field of view of the optical lens, d3 is the center thickness of the third lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, d6 is the center thickness of the sixth lens, TL is the center distance on the optical axis from the first side of the first lens to the second side of the seventh lens, Dmax(L2~L7) is the maximum value of the maximum effective aperture of the second to seventh lenses corresponding to the maximum field of view of the optical lens, d23 is the air gap between the second and third lenses, d34 is the air gap between the third and fourth lenses, d56 is the air gap between the fifth and sixth lenses, Sag(D / 2) / n is the sag at the nth point of the optical axis along the edge direction, Sag(D / 2) / (n+1) is the sag at the (n+1)th point of the optical axis along the edge direction.

[0028] According to an exemplary embodiment of this application, the optical lens satisfies any one of the following relationships: 0.006≤d12 / F≤0.044, 0.003≤d67 / TTL≤0.055, 0.033≤|(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)|≤0.91, 0.09≤L(L1~STO) / TTL≤0.16, 0.909≤|F2 / F|≤5.276, -2.229≤F4 / F≤11.073, 0.04≤d1 / F≤0.149, -1.362≤R11 / F≤-0.736, 0.478≤|R71 / F|≤1.26 9. 0.057≤BFL / TTL≤0.107, -9.233≤F1 / F≤-0.668, -1.03≤F7 / F≤48.361, 0.006≤d67 / F≤0.12, 0.267≤d2 / d3≤0.981, 1.113≤D11 / D72≤1.239, 0.009≤|(HF*θ) / (F*θ)|≤0.03, 0.068≤D11 / H / F*1mm≤0.079, 1.916≤TTL / F≤2.322, 0.088≤d2 / F≤0.171, 0.003≤d12 / TTL≤0.019, -0.244≤SAG 11 / (D11 / 2)≤-0.128, 0.513≤|F2 / F3|≤4, 0.014≤(d12+d67) / F3≤0.21, 0.619≤F3 / F≤1.771, 0.165≤|(1 / F1+1 / F2)*TTL|≤1.974, 0.202≤L(L 1~STO) / F≤0.354, 1.625≤F / H≤1.717, -1.981≤R11 / D11≤-1.086, -0.586≤R11 / TTL≤-0.327, 55.924°≤(FOV×F) / H≤59.098°, 5.23≤TTL / H / θ≤6 .361, 1.7≤F / ENPD≤1.8, 0.278≤D11 / TTL≤0.371, 0.127≤|SAG71 / (D71 / 2)|≤0.297, 0.31≤(d3+d4+d5+d6) / TL≤0.692, 0.801≤D11 / Dmax(L2~ L7)≤1.013, -0.087≤SAG11 / F≤-0.044, 0.011≤|F / F5|≤2.058, 0.006≤|F / F6|≤1.557, 0.086≤(d23+d34+d56) / F≤0.633 or 0.013≤d23 / F≤0.57.Where L (L1~STO) is the center distance on the optical axis from the first side surface of the first lens to the aperture stop, F2 is the focal length of the second lens, d1 is the center thickness of the first lens, R11 is the radius of curvature of the first side surface of the first lens, R71 is the radius of curvature of the first side surface of the seventh lens, BFL is the optical back focal length of the optical lens, F1 is the focal length of the first lens, F7 is the focal length of the seventh lens, d2 is the center thickness of the second lens, d3 is the center thickness of the third lens, D11 is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, D72 is the maximum effective aperture of the second side surface of the seventh lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, and SAG11 is the sag height corresponding to the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens. F3 is the focal length of the third lens, R11 is the radius of curvature of the first side of the first lens, FOV is the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, SAG71 is the sag corresponding to the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens, D71 is the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, d6 is the center thickness of the sixth lens, TL is the center distance on the optical axis from the first side of the first lens to the second side of the seventh lens, Dmax (L2~L7) is the maximum value of the maximum effective aperture of the second to seventh lenses corresponding to the maximum field of view of the optical lens, d23 is the air gap between the second and third lenses, d34 is the air gap between the third and fourth lenses, and d56 is the air gap between the fifth and sixth lenses.

[0029] The second aspect of this application provides an electronic device comprising an optical lens as described in the exemplary embodiments above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the light source is located on a second side of the optical lens, and the light emitted by the light source is projected onto a first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side of the optical lens.

[0030] The optical lens according to the embodiments of this application employs seven lenses with optical power, wherein the first lens has negative optical power and its first side surface is concave. The second lens has optical power. The third lens has positive optical power and its first side surface is convex, and its second side surface is convex. The fourth lens has optical power. The fifth lens has optical power. The sixth lens has optical power. The seventh lens has optical power. At least one of the fourth, fifth, and sixth lenses has positive optical power, and at least one lens has negative optical power. The optical lens has seven lenses with optical power.

[0031] This application, through a reasonable combination of the optical power and surface shape of the first to seventh lenses, controls the ratio of the air gap between the first and second lenses to the overall focal length of the optical lens, i.e., 0≤d12 / F≤0.045. This reduces the air gap between the first and second lenses, allowing the first lens to collect light promptly after diverging, which is beneficial for reducing the front aperture. It also reduces light loss, increases the light transmission of the optical lens, and further improves image quality. On the other hand, this application, by controlling the ratio of the air gap between the sixth and seventh lenses to the total optical length of the optical lens, i.e., 0≤d67 / TTL≤0.06, reduces the air gap between the sixth and seventh lenses, which is beneficial for light collection, reduces the total optical length of the optical lens, and enables miniaturization of the optical lens. Furthermore, it alters the light reflection between the lenses, making it easier for the ghost image focal point to be further away from the image plane, thereby reducing ghosting and improving image quality. On the other hand, by controlling the focal lengths of the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the entire focal length of the optical lens, i.e. 0.01≤|(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)|≤1.5, this application facilitates a smooth transition of light at the rear end of the optical lens, allowing it to smoothly enter the image plane, reducing light loss, effectively correcting aberrations, and achieving high resolution of the optical lens. Attached Figure Description

[0032] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0033] Figure 1-11 A schematic diagram of the structure of an optical lens according to embodiments 1-11 of this application is shown;

[0034] Figure 12a The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown.

[0035] Figure 12bThe F-Tan (Theta) distortion curve of the optical lens according to Embodiment 1 of this application is shown;

[0036] Figure 13a The modulation transfer function curve of the optical lens according to Embodiment 2 of this application is shown;

[0037] Figure 13b The F-Tan (Theta) distortion curve of the optical lens according to Embodiment 2 of this application is shown;

[0038] Figure 14 A schematic diagram of Sag(D / 2) / n and Sag(D / 2) / (n+1) according to an embodiment of this application is shown. Detailed Implementation

[0039] To better understand this application, various aspects of this application 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 application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0040] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0041] 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.

[0042] In this paper, 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 of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0043] 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 application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should 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 formalized sense, unless expressly so specified herein.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] The features, principles and other aspects of this application are described in detail below.

[0047] An optical lens according to an exemplary embodiment of this application 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, which are arranged sequentially from the first side to the second side along the optical axis.

[0048] 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 rays from the object side can be imaged on the image side. The second side of the optical lens is provided with an imaging surface. The imaging lens can be, for example, an automotive lens, a security monitoring lens, or a radar receiver lens.

[0049] 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.

[0050] In exemplary embodiments, the optical lens provided in this application can serve as a light receiving lens or a light emitting lens. The light receiving lens is typically used to collect light from the object-side space, and the collected light is used to form detection information, including but not limited to imaging and laser point clouds. The light emitting lens is typically used to transmit light from the light emitting unit to the object-side space. According to the function of the light, the light transmitted to the object-side space can be divided into projection light for forming a projected image or detection light for detecting target information. It is understood that when the optical lens provided in this application is used as a light receiving lens such as a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, the term "first side" as used herein can refer to the object side, and "second side" can refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. The camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0051] In some possible implementations, the optical lens provided in this application can also simultaneously perform both light receiving and light transmitting functions. For example, the optical lens provided in this application is used in a lidar system with shared light and light paths, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application is used in a system integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0052] In an exemplary embodiment, the first lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, concave. The first lens is a negative lens and has a diverging effect on light. The first lens allows light rays exiting through the second side surface of the first lens to have a larger light-receiving surface for the subsequent lens group under the same field of view. The concave first side surface of the first lens can effectively collect light, which is beneficial for reducing the front aperture and improving the imaging quality of the optical lens. The concave second side surface of the first lens can further diverge light, which is beneficial for increasing the light transmission of the optical lens and achieving high light transmission. The first lens may be made of a high refractive index material, which can reduce the incident angle of the incident light and is beneficial for reducing the small front aperture.

[0053] In an exemplary embodiment, the first lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The first lens is a negative lens and has a diverging effect on light. The first lens allows light rays exiting through the second side surface of the first lens to have a larger light-receiving surface for the rear lens group under the same field of view. The concave first side surface of the first lens effectively collects light, which helps to reduce the front aperture and improve the imaging quality of the optical lens. The convex second side surface of the first lens effectively converges light, which helps to reduce the rear aperture. The first lens may be made of a high refractive index material, which can reduce the incident angle of the incident light and helps to reduce the small front aperture.

[0054] In an exemplary embodiment, the second lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The second lens is a negative lens and has a diverging effect on light. The second lens can further diverge light, which helps to increase the light transmission of the optical lens and improve its imaging quality. The first side surface of the second lens is convex, which can further converge the light rays incident through the first lens, providing a better foundation for the light resolving power of the subsequent lens group. The second side surface of the second lens is concave, which can correct the residual aberrations of the first side surface and improve the resolving power of the optical lens.

[0055] In an exemplary embodiment, the second lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The second lens is a negative lens and has a diverging effect on light. The second lens can further diverge light, increasing the light transmission of the optical lens and improving its imaging quality. The concave first side surface of the second lens can receive light emitted from the first lens, reducing the sensitivity of the optical lens, improving its resolution, and achieving high resolution. The convex second side surface of the second lens can converge light, allowing it to better enter the rear lens group.

[0056] In an exemplary embodiment, the second lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The second lens is a positive lens and has a converging effect on light. The second lens can converge the light rays emitted by the first lens, which is beneficial for reducing the front aperture. Furthermore, the second lens can appropriately control the direction of light rays, thereby improving the resolving power of the optical lens. The convex first side surface of the second lens can further converge the light rays incident through the first lens, providing a better foundation for optimizing the light resolving power of the subsequent lens group. The convex second side surface of the second lens can correct the aberrations caused by the two sides of the first lens and the first side surface of the second lens. Simultaneously, the second side surface of the second lens, in conjunction with the first side surface of the second lens, can further converge light rays, reduce aberrations of light rays at different angles, and improve the imaging quality of the optical lens.

[0057] In an exemplary embodiment, the second lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The second lens is a positive lens and has a converging effect on light. The second lens can converge the light rays emitted by the first lens, which is beneficial for reducing the front aperture. Furthermore, the second lens can appropriately control the light path, thereby improving the resolving power of the optical lens. The convex first side surface of the second lens can further converge the light rays incident through the first lens, providing a better foundation for optimizing the light resolution of the subsequent lens group. The concave second side surface of the second lens can appropriately diverge light rays, which is beneficial for increasing the light aperture and improving the resolving power of the optical lens.

[0058] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The third lens is a positive lens and has a converging effect on light. The third lens can quickly converge the diverging light rays from the front group to change the light trajectory, bringing the light closer to the optical axis. This facilitates the light rays' smooth entry into the rear group lens, reduces the rear aperture, and improves the resolution of the optical lens. The convex first side surface of the third lens can converge the light rays from the front group, reducing field curvature and lowering the light beam height, which helps reduce costs and achieve miniaturization of the optical lens. The convex second side surface of the third lens can correct coma and other aberrations generated by the first and second lenses, and, in conjunction with the first and second lenses, achieve a high-resolution structure, which is beneficial for maximizing performance.

[0059] In an exemplary embodiment, the fourth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The fourth lens is a positive lens and has a converging effect on light. The fourth lens can further converge the light rays passing through the third lens, relieving the converging pressure on the third lens, enabling better light transition, reducing the sensitivity of the subsequent lens group, and improving the resolution of the optical lens. The first side surface of the fourth lens is convex, which can effectively converge the light rays emitted from the third lens, reducing the light beam height and decreasing the size of the subsequent lens group, thus contributing to the miniaturization of the optical lens. The second side surface of the fourth lens is convex, which, in conjunction with the first side surface, can achieve greater converging capability, thereby distributing more optical power and reducing the pressure on other lenses.

[0060] In an exemplary embodiment, the fourth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The fourth lens is a positive lens and has a converging effect on light. The fourth lens can further converge the light rays passing through the third lens, relieving the converging pressure on the third lens, enabling better light transition, reducing the sensitivity of the subsequent lens group, and improving the resolution of the optical lens. The convexity of the first side surface of the fourth lens can effectively converge the light rays emitted from the third lens, reducing the light beam height and decreasing the size of the subsequent lens group, which is beneficial for the miniaturization of the optical lens. The concaveness of the second side surface of the fourth lens can appropriately diverge the light rays, widening the gaps between edge light rays, and reducing the distortion of the optical lens.

[0061] In an exemplary embodiment, the fourth lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, concave. The fourth lens is a negative lens and has a diverging effect on light. The fourth lens can appropriately diverge light, widening the gap between peripheral light rays, which can reduce the distortion of the optical lens and improve its resolving power. The fourth lens has a biconcave structure, which is beneficial for correcting aberrations, allowing the central and peripheral field rays to return to their ideal positions, thus improving the resolving power of the optical lens.

[0062] In an exemplary embodiment, the fourth lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The fourth lens is a negative lens and has a diverging effect on light. The fourth lens can appropriately diverge light, widening the gaps between edge rays, thereby reducing optical lens distortion and improving the resolution of the optical lens. The convex first side surface of the fourth lens can effectively converge the light emitted from the third lens, reducing the light beam height and decreasing the size of the rear lens group, which is beneficial for miniaturization of the optical lens. The concave second side surface of the fourth lens is conducive to diverging light and can improve the illumination of the optical lens.

[0063] In an exemplary embodiment, the fifth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The fifth lens is a positive lens and has a converging effect on light. The fifth lens can adjust the height of light rays, suppressing light rays and reducing the size of the lens, which is beneficial for miniaturization of optical lenses. The fifth lens has a biconvex structure, which can further converge light rays, thus helping to reduce the rear aperture.

[0064] In an exemplary embodiment, the fifth lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, concave. The fifth lens is a negative lens and has a diverging effect on light. The fifth lens can adjust the trajectory of edge rays, reducing distortion and improving the image quality of the optical lens. The concave first side surface of the fifth lens diverges light, which helps increase the light transmission of the optical lens and improve its resolving power. The concave second side surface of the fifth lens further diverges light, raising the light beam height and enlarging the image plane. Simultaneously, it can balance aberrations and improve the resolving power of the optical lens.

[0065] In an exemplary embodiment, the fifth lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The fifth lens is a negative lens and has a diverging effect on light. The fifth lens can adjust the trajectory of edge rays, reducing distortion and improving the image quality of the optical lens. The convex first side surface of the fifth lens can collect light from the front lens group; the first and second sides work together to adjust and balance spherical aberration and coma, improving the resolving power of the optical lens. The concave second side surface of the fifth lens further diverges light, allowing it to smoothly enter the rear lens group, reducing the sensitivity of the optical lens and improving its resolving power.

[0066] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The sixth lens is a positive lens and has a converging effect on light. The sixth lens can effectively converge light, allowing the light to be deflected along the optical axis, which helps to reduce the rear aperture. The first side surface of the sixth lens is convex, which can adjust the height of the rear group of light rays and reduce the light deflection pressure on the seventh lens. The sixth lens can cooperate with the seventh lens to allow light to accurately enter the imaging plane. The second side surface of the sixth lens is convex, which can effectively converge light, reduce aberrations around the center, and improve the resolving power of the optical lens.

[0067] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The sixth lens is a positive lens and has a converging effect on light. The sixth lens can effectively converge light rays, allowing them to be deflected along the optical axis, which is beneficial for reducing the rear aperture. The concave first side surface of the sixth lens can better transition light rays, reducing the sensitivity of the optical lens and improving its resolving power. The convex second side surface of the sixth lens can effectively converge light rays, reducing aberrations around the center and periphery, and improving the resolving power of the optical lens.

[0068] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The sixth lens is a positive lens and has a converging effect on light. The sixth lens can effectively converge the incoming light, allowing the light to be deflected along the optical axis, which helps to reduce the rear aperture. The convexity of the first side surface of the sixth lens allows adjustment of the height of the rear group of light rays, reducing the light deflection pressure on the seventh lens. The sixth lens, in conjunction with the seventh lens, allows light to enter the image plane precisely. The concave nature of the second side surface of the sixth lens makes the light entering the seventh lens smoother, reducing the spatial sensitivity at the corresponding location and improving the resolving power of the optical lens.

[0069] In an exemplary embodiment, the sixth lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The sixth lens is a negative lens and has a diverging effect on light. The sixth lens allows light to diverge more effectively before entering the rear lens group, adjusting the height of peripheral rays on the image plane, which helps improve the CRA (Chief Ray Angle) and enhances the image quality of the optical lens. The convex first side surface of the sixth lens can appropriately converge light, which helps reduce the rear aperture. The concave second side surface of the sixth lens makes the light entering the seventh lens smoother, reducing spatial sensitivity at the corresponding location and improving the resolving power of the optical lens.

[0070] In an exemplary embodiment, the sixth lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The sixth lens is a negative lens and has a diverging effect on light. The sixth lens allows light to diverge more effectively into the rear lens group, adjusting the height of peripheral rays on the image plane, which helps improve CRA (Collateral Resonance Aspect Ratio) and enhances the image quality of the optical lens. The concave first side surface of the sixth lens better facilitates light transmission, reduces system sensitivity, and improves resolution. The convex second side surface of the sixth lens appropriately converges light, which helps reduce the rear aperture.

[0071] In an exemplary embodiment, the seventh lens may have negative optical power, with its first side surface being, for example, concave and its second side surface being, for example, convex. The seventh lens is a negative lens and has a diverging effect on light. The seventh lens can diverge the light emitted from the sixth lens, further adjusting the divergence of the front group of light rays, increasing the illumination of the peripheral field of view, reducing optical lens distortion, improving CRA, and enhancing the resolution of the optical lens. The concave first side surface of the seventh lens further diverges light rays, allowing them to reach a higher imaging position, thereby achieving large image plane imaging and improving the image quality of the optical lens. It can also correct optical lens aberrations, adjust optical path differences across fields of view, and balance resolution. The convex second side surface of the seventh lens lowers the height of light rays, correcting primary aberrations such as field curvature and coma, further improving the resolution of the optical lens. It also ensures that CRA is not excessive, reducing the risk of color cast in the image.

[0072] In an exemplary embodiment, the seventh lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, concave. The seventh lens is a negative lens and has a diverging effect on light. The seventh lens can diverge the light emitted by the sixth lens, further adjust the divergence of the front group of light rays, increase the illumination of the peripheral field of view, reduce optical lens distortion, and thus improve CRA (Corrective Aberration) and the resolution of the optical lens. The concave first side surface of the seventh lens can further diverge light rays, allowing them to reach a higher imaging position, thereby achieving large image plane imaging and improving the image quality of the optical lens. It can also correct optical lens aberrations, adjust optical path differences in various fields of view, and balance resolution. The concave second side surface of the seventh lens can further diverge light rays, increase edge illumination, and further improve CRA.

[0073] In an exemplary embodiment, the seventh lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The seventh lens is a positive lens and has a converging effect on light. The seventh lens can further converge the front group of light rays, bringing them closer to the image plane, which is beneficial for the miniaturization of the optical lens, reducing light loss, and improving the image quality of the optical lens. The convex first side surface of the seventh lens can correct aberrations in the optical lens, correct optical path differences in various fields of view, and balance resolving power. The concave second side surface of the seventh lens can further diverge light, improve edge illumination, and help improve CRA (Corrective Aspect Ratio).

[0074] In exemplary embodiments, the third lens and the fourth lens are cemented together to form a cemented lens, or the fourth lens and the fifth lens are cemented together to form a cemented lens, or the fifth lens and the sixth lens are cemented together to form a cemented lens. Light rays diverge after passing through the first and second lenses. The third lens quickly converges the light rays, achieving a change in the light ray's trajectory, but this introduces a significant optical path difference, making it difficult to completely eliminate chromatic aberration. This application, by setting two of the third to sixth lenses as cemented lenses, is more conducive to correcting chromatic aberration, allowing various aberrations of the optical lens to be fully corrected. Under the premise of a compact structure, it can improve resolution, optimize distortion, and improve CRA (chromatic aberration response). Cemented lenses can reduce the air gap between lenses, shorten the overall optical length, and make the overall structure of the optical lens more compact. Cemented lenses can reduce tolerance sensitivity issues such as overall eccentricity during lens assembly. Cemented lenses can replace the air-glass interface between lenses with a cemented interface, reducing light loss caused by inter-lens reflections and improving the overall light transmittance of the optical lens. By employing a matching combination of high and low refractive index materials, it is possible to create apertures with larger diameters, thereby increasing the light transmission of the optical lens. Furthermore, cemented lenses can effectively correct various aberrations in the optical lens; by cementing positive and negative lenses, spherical aberration and chromatic aberration can be effectively eliminated, improving image quality.

[0075] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the second lens and the third lens. By placing an aperture stop between the second and third lenses, it is beneficial to effectively converge light, reduce the lens aperture at the front and rear ends of the optical system, increase light transmission, balance optical performance, and reduce the sensitivity of the optical lens during assembly. It should be understood that the placement of the aperture stop between the second and third lenses is merely exemplary, and this application does not impose specific limitations on it; the aperture stop may be placed in other positions as needed.

[0076] In the exemplary embodiment, the first to seventh lenses are all glass spherical lenses. By employing all-glass spherical lenses, this application can effectively reduce costs while meeting temperature performance and high resolution requirements. However, when resolving performance is the primary concern, aspherical lenses can be added to further improve resolving quality; when cost is the primary concern, glass lenses can be replaced with plastic lenses to reduce lens costs.

[0077] In an exemplary embodiment, the optical lens may further include a filter located between the seventh lens and the image plane to filter light of different wavelengths. The optical lens may also, as needed, have a protective glass between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0078] 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 a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0079] In an exemplary embodiment, the air gap d12 between the first lens and the second lens and the total focal length F of the optical lens can satisfy: 0 ≤ d12 / F ≤ 0.045. Preferably, 0.006 ≤ d12 / F ≤ 0.044. By controlling this relationship, the air gap between the first lens and the second lens can be reduced, allowing the first lens to collect light promptly after diverging, which is beneficial for reducing the front aperture. Simultaneously, it can reduce light loss and increase the light transmission of the optical lens.

[0080] In an exemplary embodiment, the air gap d67 between the sixth and seventh lenses and the total optical length TTL of the optical lens can satisfy: 0 ≤ d67 / TTL ≤ 0.06. Preferably, 0.003 ≤ d67 / TTL ≤ 0.055. By controlling this relationship, the air gap between the sixth and seventh lenses can be reduced, which is beneficial for light collection, and the total optical length of the optical lens can be reduced, enabling miniaturization of the optical lens. Furthermore, it can alter the light reflection between the lenses, making it easier for the ghost image focal point to move away from the image plane, thereby reducing ghosting.

[0081] In an exemplary embodiment, the focal lengths F4, F5, F6, and F7 of the fourth lens, and the entire focal length F of the optical lens can satisfy 0.01 ≤ |(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)| ≤ 1.5. Preferably, 0.033 ≤ |(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)| ≤ 0.91. By controlling this relationship, light can smoothly transition at the rear end of the optical lens to enter the image plane, reducing light loss, effectively correcting aberrations, and achieving high resolution of the optical lens.

[0082] In an exemplary embodiment, the central distance L (L1~STO) from the first side of the first lens to the center of the aperture on the optical axis and the total optical length TTL of the optical lens satisfy: 0.05 ≤ L (L1~STO) / TTL ≤ 0.165. Preferably, 0.09 ≤ L (L1~STO) / TTL ≤ 0.16. By controlling this relationship, the aperture can be set at a reasonable position to control the short distance from the first lens to the aperture. When the first side of the first lens is concave, the front group of lenses can quickly diverge light, reduce the front aperture, improve the resolution performance, and achieve high resolution of the optical lens.

[0083] In an exemplary embodiment, for the seventh lens, when the first side of the seventh lens is convex or the second side is concave, the sagittal height is positive and can satisfy: Sag(D / 2) / n > Sag(D / 2) / (n + 1). When the first side of the seventh lens is concave or the second side is convex, the sagittal height is negative and can satisfy: Sag(D / 2) / n < Sag(D / 2) / (n + 1). As Figure 14 shown, Sag(D / 2) / n is the sagittal height at one - nth of the optical axis towards the edge direction, and Sag(D / 2) / (n + 1) is the sagittal height at one - (n + 1)th of the optical axis towards the edge direction. By controlling this relationship, the surface shape of the seventh lens can be controlled, such that the sagittal height can vary monotonically as the aperture on both sides of the lens increases, and when the environment temperature changes from high to low, the change in the surface shape of the lens is small, so that the change in focal length is relatively stable, thereby achieving stable imaging under high - low temperature environment changes.

[0084] In an exemplary embodiment, the focal length value F2 of the second lens and the overall focal length value F of the optical lens can satisfy: 0.5 ≤ |F2 / F| ≤ 6. Preferably, 0.909 ≤ |F2 / F| ≤ 5.276. By controlling this relationship, the focal length range of the second lens can be set within a reasonable range, which can effectively transition the divergent light passing through the first lens, so that the light can enter the rear group of lenses more smoothly, and achieve high light - passing quantity of the optical lens.

[0085] In an exemplary embodiment, the focal length value F4 of the fourth lens and the overall focal length value F of the optical lens can satisfy: - 3 ≤ F4 / F ≤ 13. Preferably, - 2.229 ≤ F4 / F ≤ 11.073. By controlling this relationship, the focal length range of the fourth lens can be set within a reasonable range, which is beneficial to controlling optical aberrations, improving the imaging quality of the optical lens, and achieving high resolution of the optical lens.

[0086] In an exemplary embodiment, the center thickness d1 of the first lens and the total focal length F of the optical lens can satisfy: 0.02 ≤ d1 / F ≤ 0.18. Preferably, 0.04 ≤ d1 / F ≤ 0.149. The first lens has negative optical power, and the first side surface of the first lens is concave. By controlling this relationship, the center thickness of the first lens can be made smaller, which allows for a further reduction in lens aperture while still collecting light from the field of view. Simultaneously, it can appropriately alleviate the light-gathering pressure on the second lens, reduce system sensitivity, and improve the resolving power of the optical lens.

[0087] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the total focal length F of the optical lens can satisfy: -1.4 ≤ R11 / F ≤ -0.6. Preferably, -1.362 ≤ R11 / F ≤ -0.736. The first lens has negative optical power, and the first side surface of the first lens is concave. By controlling this relationship, the radius of curvature of the first side surface of the first lens can be controlled within a reasonable range. A smaller radius of curvature allows for better adjustment of the incident light path, reducing the lens aperture while maintaining the resolving power of the optical lens. Furthermore, by controlling the radius of curvature of the first side surface of the first lens, distortion of the optical lens can be reduced.

[0088] In an exemplary embodiment, the radius of curvature R71 of the first side surface of the seventh lens and the overall focal length F of the optical lens can satisfy: 0.2 ≤ |R71 / F| ≤ 1.5. Preferably, 0.478 ≤ |R71 / F| ≤ 1.269. By controlling this relationship, the radius of curvature of the first side surface of the seventh lens can be controlled within a reasonable range. A smaller radius of curvature allows for better adjustment of the incident light trajectory, enabling the light to enter the image plane smoothly, improving CRA (Curvature Aspect Ratio), and thus enhancing the imaging quality of the optical lens, achieving high resolution. It also facilitates the miniaturization of the optical lens.

[0089] In an exemplary embodiment, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens can satisfy the following ratio: 0.02 ≤ BFL / TTL ≤ 0.115. Preferably, 0.057 ≤ BFL / TTL ≤ 0.107. By controlling this relationship, the ratio of the optical back focal length to the total optical length of the optical lens can be controlled within a reasonable range, providing a suitable optical back focal length while meeting the miniaturization requirements of the optical lens.

[0090] In an exemplary embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens can satisfy: -10 ≤ F1 / F ≤ -0.3. Preferably, -9.233 ≤ F1 / F ≤ -0.668. By controlling this relationship, the light deflection capability can be enhanced, which is beneficial for light collection, reducing the front aperture, and achieving high resolution of the optical lens. Furthermore, when the first side surface of the first lens is concave, it is beneficial for achieving a telephoto lens.

[0091] In an exemplary embodiment, the focal length F7 of the seventh lens and the total focal length F of the optical lens can satisfy: -2 ≤ F7 / F ≤ 55. Preferably, -1.03 ≤ F7 / F ≤ 48.361. By controlling this relationship, the focal length range of the seventh lens can be controlled within a reasonable range, which is beneficial for adjusting the light path and improving CRA. At the same time, it can also ensure the maximum image height and reserve a certain amount of back focal length margin.

[0092] In an exemplary embodiment, the air gap d67 between the sixth and seventh lenses and the overall focal length F of the optical lens can satisfy: 0 ≤ d67 / F ≤ 0.125. Preferably, 0.006 ≤ d67 / F ≤ 0.12. By controlling this relationship, the air gap between the sixth and seventh lenses can be reduced, which is beneficial for light collection, and the overall length of the optical lens can be reduced, achieving miniaturization of the optical lens. Furthermore, it can also change the light reflection between the lenses, making it easier for the ghost image focal point to be further away from the image plane, thereby reducing ghosting.

[0093] In an exemplary embodiment, the center thickness d2 of the second lens and the center thickness d3 of the third lens can satisfy: 0.1 ≤ d2 / d3 ≤ 1. Preferably, 0.267 ≤ d2 / d3 ≤ 0.981. By controlling this relationship, the center thicknesses of the second and third lenses can be controlled within a reasonable range, allowing for better adjustment of the light path before and after the aperture stop, improving image quality, and enhancing the resolving power of the optical lens.

[0094] In an exemplary embodiment, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens and the maximum effective aperture D72 of the second side of the seventh lens corresponding to the maximum field of view of the optical lens can satisfy: 1 ​​≤ D11 / D72 ≤ 1.3. Preferably, 1.113 ≤ D11 / D72 ≤ 1.239. By controlling this relationship, the aperture sizes of the first lens and the seventh lens can be made similar and within a reasonable range, enabling miniaturization of the optical lens while maintaining a reasonable aperture distribution among the lenses.

[0095] In an exemplary embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens can satisfy: 0 ≤ |(HF*θ) / (F*θ)| ≤ 0.05. Preferably, 0.009 ≤ |(HF*θ) / (F*θ)| ≤ 0.03. By controlling this relationship, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the maximum field of view of the optical lens can be controlled within a reasonable range, which can effectively reduce the distortion of the optical lens.

[0096] In an exemplary embodiment, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens can satisfy: 0.06≤D11 / H / F*1mm≤0.085. Preferably, 0.068≤D11 / H / F*1mm≤0.079. By controlling this relationship, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens can be controlled within a reasonable range, allowing for a reduction in the front aperture while maintaining high resolution.

[0097] In an exemplary embodiment, the total optical length (TTL) of the optical lens and the total focal length (F) of the optical lens can satisfy: 1.5 ≤ TTL / F ≤ 2.5. Preferably, 1.916 ≤ TTL / F ≤ 2.322. By controlling this relationship, the ratio of the total optical length to the total focal length of the optical lens can be controlled within a reasonable range, enabling miniaturization of the optical lens while maintaining high resolution.

[0098] In an exemplary embodiment, the center thickness d2 of the second lens and the total focal length F of the optical lens can satisfy: 0.02 ≤ d2 / F ≤ 0.2. Preferably, 0.088 ≤ d2 / F ≤ 0.171. By controlling this relationship, the center thickness of the second lens can be controlled within a reasonable range, which can better transition the light rays diverging from the first lens, reduce light loss, increase the light transmission of the optical lens, improve resolution quality, and achieve high light transmission and high resolution of the optical lens.

[0099] In an exemplary embodiment, the air gap d12 between the first lens and the second lens and the total optical length TTL of the optical lens can satisfy: 0 ≤ d12 / TTL ≤ 0.02. Preferably, 0.003 ≤ d12 / TTL ≤ 0.019. By controlling this relationship, the air gap between the first lens and the second lens can be reduced, allowing light rays that have diverged through the first lens to be collected in a timely manner, which is beneficial for reducing the front aperture. Simultaneously, it can also reduce light loss and increase the light transmission of the optical lens.

[0100] In an exemplary embodiment, the sag SAG11 corresponding to the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens and the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens can satisfy: -0.3≤SAG11 / (D11 / 2)≤-0.1. Preferably, -0.244≤SAG11 / (D11 / 2)≤-0.128. By controlling this relationship, the surface shape of the first side of the first lens can be reasonably set, which is beneficial for collecting field light, adjusting the light path, improving resolution performance, and reducing the front aperture.

[0101] In an exemplary embodiment, the focal length F2 of the second lens and the focal length F3 of the third lens can satisfy: 0.2 ≤ |F2 / F3| ≤ 4.5. Preferably, 0.513 ≤ |F2 / F3| ≤ 4. By controlling this relationship, the ratio of the focal length of the second lens to the focal length of the third lens can be set within a reasonable range, allowing light to pass smoothly through the aperture stop, reducing the sensitivity of the optical lens, and improving the imaging quality of the optical lens.

[0102] In an exemplary embodiment, the air gap d12 between the first and second lenses, the air gap d67 between the sixth and seventh lenses, and the focal length F3 of the third lens can satisfy: 0.01 ≤ (d12 + d67) / F3 ≤ 0.25. Preferably, 0.014 ≤ (d12 + d67) / F3 ≤ 0.21. By controlling the air gap between the first and second lenses, and the air gap between the sixth and seventh lenses, in conjunction with the focal length of the third lens, light can transition smoothly within the optical lens, reducing the sensitivity of the optical lens and improving its resolving quality.

[0103] In an exemplary embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens group can satisfy: 0.2 ≤ F3 / F ≤ 2. Preferably, 0.619 ≤ F3 / F ≤ 1.771. The third lens has a positive focal length, and the focal length is relatively small. By controlling this relationship, the third lens can quickly converge light, allowing the light to enter the rear lens group smoothly, effectively reducing aberrations in the optical lens and improving image quality. Simultaneously, it can also reduce the rear aperture, achieving miniaturization of the optical lens.

[0104] In an exemplary embodiment, the focal length F1 of the first lens, the focal length F2 of the second lens, and the total optical length (TTL) of the optical lens can satisfy: 0.05 ≤ |(1 / F1 + 1 / F2) * TTL| ≤ 2.5. Preferably, 0.165 ≤ |(1 / F1 + 1 / F2) * TTL| ≤ 1.974. By controlling this relationship, the optical power of the front group lenses (such as the first and second lenses) can be adjusted, allowing light to enter the optical lens while maintaining a small aperture at the front end, thereby increasing light transmission and achieving high resolution.

[0105] In an exemplary embodiment, the center distance L (L1~STO) from the first side surface of the first lens to the aperture stop on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.1≤L(L1~STO) / F≤0.4. Preferably, 0.202≤L(L1~STO) / F≤0.354. By controlling this relationship, the aperture stop can be controlled at a reasonable position, reducing the distance from the first lens to the aperture stop. The first side surface of the first lens is concave, allowing the front lens group to achieve rapid light divergence, reducing the front aperture and improving resolving performance.

[0106] In an exemplary embodiment, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 1.6 ≤ F / H ≤ 1.8. Preferably, 1.625 ≤ F / H ≤ 1.717. By controlling this relationship, the total focal length F of the optical lens and the image height corresponding to the maximum field of view of the optical lens can be controlled within a reasonable range, thereby improving the resolving power of the optical lens.

[0107] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the maximum effective aperture D11 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens can satisfy: -2.5 ≤ R11 / D11 ≤ -0.5. Preferably, -1.981 ≤ R11 / D11 ≤ -1.086. By controlling this relationship, the ratio of the radius of curvature of the first side surface of the first lens to the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens can be controlled within a reasonable range, which can improve the resolving power of the optical lens while reducing the front aperture.

[0108] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the total optical length TTL of the optical lens can satisfy: -0.7 ≤ R11 / TTL ≤ -0.2. Preferably, -0.586 ≤ R11 / TTL ≤ -0.327. By controlling this relationship, the ratio of the radius of curvature of the first side surface of the first lens to the total optical length of the optical lens can be controlled within a reasonable range, which is beneficial for changing the light path and reducing ghosting.

[0109] In an exemplary embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens can satisfy: 50° ≤ (FOV × F) / H ≤ 65°. Preferably, 55.924° ≤ (FOV × F) / H ≤ 59.098°. By controlling this relationship, the maximum field of view, the total focal length (F) of the optical lens, and the image height corresponding to the maximum field of view of the optical lens can be controlled within a reasonable range, which is beneficial for achieving telephoto capabilities while also maintaining a large angular resolution.

[0110] In an exemplary embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) corresponding to the maximum field of view of the optical lens can satisfy: 5 ≤ TTL / H / θ ≤ 7. Preferably, 5.23 ≤ TTL / H / θ ≤ 6.361. By controlling this relationship, the total optical length of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) corresponding to the maximum field of view of the optical lens can be set within a reasonable range. This effectively limits the length of the optical lens while maintaining high resolution, enabling miniaturization of the optical lens.

[0111] In an exemplary embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy: 1.6 ≤ F / ENPD ≤ 1.9. Preferably, 1.7 ≤ F / ENPD ≤ 1.8. By controlling this relationship, the ratio of the overall focal length F of the optical lens to the entrance pupil diameter of the optical lens can be set within a reasonable range, achieving high light transmission of the optical lens while realizing miniaturization and high resolution.

[0112] In an exemplary embodiment, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.25≤D11 / TTL≤0.4. Preferably, 0.278≤D11 / TTL≤0.371. By controlling this relationship, the relationship between the maximum effective aperture of the first side of the first lens and the total optical length can be balanced, thereby achieving miniaturization of the optical lens.

[0113] In an exemplary embodiment, the sag SAG71 corresponding to the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens and the maximum effective aperture D71 of the first side of the seventh lens at the maximum field of view of the optical lens can satisfy: 0.1≤|SAG71 / (D71 / 2)|≤0.4. Preferably, 0.127≤|SAG71 / (D71 / 2)|≤0.297. By controlling this relationship, the sag corresponding to the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens and the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens can be controlled within a reasonable range, which is beneficial for the light emitted from the sixth lens to enter the seventh lens smoothly, and can balance the illuminance and CRA of the optical lens.

[0114] In an exemplary embodiment, the center thicknesses d3, d4, d5, and d6 of the third lens, and the center distance TL between the first side surface of the first lens and the second side surface of the seventh lens on the optical axis can satisfy: 0.2 ≤ (d3 + d4 + d5 + d6) / TL ≤ 0.8. Preferably, 0.31 ≤ (d3 + d4 + d5 + d6) / TL ≤ 0.692. By controlling this relationship, the ratio of the center thicknesses of the third, fourth, fifth, and sixth lenses to the center distance between the first side surface of the first lens and the second side surface of the sixth lens on the optical axis can be controlled within a reasonable range. This allows the overall light path to converge smoothly and continuously, which is beneficial for achieving a telephoto lens, reducing optical lens distortion, and balancing low sensitivity and a short overall optical length.

[0115] In an exemplary embodiment, the maximum effective aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens and the maximum value Dmax (L2~L7) of the maximum effective apertures of the second to seventh lenses corresponding to the maximum field of view of the optical lens can satisfy: 0.7≤D11 / Dmax(L2~L7)≤1.1. Preferably, 0.801≤D11 / Dmax(L2~L7)≤1.013. By controlling this relationship, the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens can be close to the maximum effective aperture of the second to seventh lenses, so that the optical lens can meet the small aperture requirement. At the same time, it can also make the aperture distribution of each lens more balanced.

[0116] In an exemplary embodiment, the sagitta SAG11 corresponding to the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens can satisfy the following condition with the overall focal length F of the optical lens: -0.1 ≤ SAG11 / F ≤ -0.02. Preferably, -0.087 ≤ SAG11 / F ≤ -0.044. By controlling this relationship, the sagitta corresponding to the maximum effective aperture of the first side of the seventh lens at the maximum field of view of the optical lens can be controlled within a reasonable range. Combined with the negative optical power of the first lens, it can better collect light, reduce the front aperture, and also change the light path, thus reducing ghosting.

[0117] In an exemplary embodiment, the total focal length F of the optical lens and the focal length F5 of the fifth lens can satisfy: 0.005 ≤ |F / F5| ≤ 3. Preferably, 0.011 ≤ |F / F5| ≤ 2.058. By controlling this relationship, the focal length range of the fifth lens can be set within a reasonable range, which is beneficial for smooth light transition, reduces the sensitivity of the optical lens, and improves the resolution of the optical lens.

[0118] In an exemplary embodiment, the total focal length F of the optical lens and the focal length F6 of the sixth lens can satisfy: 0.001 ≤ |F / F6| ≤ 2.5. Preferably, 0.006 ≤ |F / F6| ≤ 1.557. By controlling this relationship, the focal length range of the sixth lens can be set within a reasonable range, which is beneficial for smooth light transition, reduces the sensitivity of the optical lens, and improves the resolving power of the optical lens.

[0119] In an exemplary embodiment, the air gaps d23 between the second and third lenses, d34 between the third and fourth lenses, and d56 between the fifth and sixth lenses, along with the overall focal length F of the optical lens, can satisfy the following: 0.05 ≤ (d23 + d34 + d56) / F ≤ 0.8. Preferably, 0.086 ≤ (d23 + d34 + d56) / F ≤ 0.633. By controlling this relationship, the air gaps between the second and third lenses, the third and fourth lenses, and the fifth and sixth lenses can be set within a reasonable range. This facilitates the control of light trajectory in the middle section of the optical lens, improving resolution performance while achieving miniaturization of the optical lens.

[0120] In an exemplary embodiment, the air gap d23 between the second lens and the third lens and the overall focal length value F of the optical lens satisfy: 0.01 ≤ d23 / F ≤ 0.65. Preferably, 0.013 ≤ d23 / F ≤ 0.57. By controlling this relationship, the air gap between the second lens and the third lens can be set within a reasonable range, which can better transmit light, is beneficial to regulating the light trend, can improve the resolution of the optical lens, and achieve high resolution.

[0121] In an exemplary embodiment, the air gap d23 between the second lens and the third lens and the overall focal length value F of the optical lens satisfy: 0.05 ≤ d23 / F ≤ 0.65. Preferably, 0.05 ≤ d23 / F ≤ 0.57. By controlling this relationship, the air gap between the second lens and the third lens can be made larger. Coupled with the convex surface on the object side of the third lens, it is beneficial to reduce the sensitivity of the optical lens and improve the imaging quality of the optical lens.

[0122] In an exemplary embodiment, for the first lens to the sixth lens, when the first side is convex or the second side is concave, the sagittal height is positive, Sag(D / 2) / n > Sag(D / 2) / (n + 1). For the first lens to the sixth lens, when the first side is concave or the second side is convex, the sagittal height is negative, Sag(D / 2) / n < Sag(D / 2) / (n + 1). As Figure 14 shown, Sag(D / 2) / n is the sagittal height at one nth of the optical axis towards the edge direction, and Sag(D / 2) / (n + 1) is the sagittal height at one (n + 1)th of the optical axis towards the edge direction. By controlling this relationship, the surface shape of the corresponding lens can be controlled, so that the sagittal height can change monotonically as the aperture on both sides of the lens increases. When the temperature of the lens changes in the high and low temperature environment, the change in the surface shape of the lens is small, so that the change in the focal length is relatively stable, and thus stable imaging under high and low temperature environment changes can be achieved.

[0123] According to the optical lens of the above embodiment of the present application, better optical effects can be achieved through the preferred ranges of each relationship, which is more conducive to achieving high resolution and miniaturization of the optical lens.

[0124] The optical lens according to the above embodiment of the present application can adopt multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical parameters of each lens, the advantages of small aperture, miniaturization, and high resolution of the optical lens are achieved. The temperature performance of this optical lens is good, the imaging effect changes little under high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above embodiment of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0125] Those skilled in the art should understand that the total optical length (TTL) of the optical lens used above refers to the axial distance from the first side surface of the first lens to the imaging plane or image source plane; the back focal length (BFL) of the optical lens refers to the axial distance from the second side surface of the seventh lens to the imaging plane or image source plane; the air gap refers to the axial distance between the sides of two adjacent lenses, for example, the air gap between the first lens and the second lens is the distance on the optical axis from the second side surface of the first lens to the first side surface of the second lens; the center thickness is the axial distance between the two sides of the lens, for example, the center thickness of the first lens is the distance on the optical axis from the first side surface of the first lens to the second side surface of the first lens; and the maximum field of view (FOV) of the optical lens is related to the image height (H), which refers to the field of view corresponding to the image height (H).

[0126] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0127] Example 1

[0128] The following is for reference Figure 1 Describes an optical lens according to Embodiment 1 of this application. For example... Figure 1 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0129] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0130] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0131] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0132] The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being concave.

[0133] The fifth lens L5 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0134] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0135] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0136] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0137] Table 1 shows the basic parameters of the optical lens of Example 1.

[0138] Table 1

[0139] Face number Central radius of curvature Thickness / Distance (mm) Refractive index Abbe number S1 -12.874 1.494 1.59 35.45 S2 -26.740 0.100 S3 108.913 1.363 1.75 25.05 S4 18.002 1.871 STO infinity -0.631 S6 20.810 2.909 1.88 40.81 S7 -29.808 0.100 S8 12.068 5.923 1.88 40.81 S9 10.077 3.779 S10 23.749 4.947 1.62 63.86 S11 -6.882 2.436 1.92 23.96 S12 -22.236 0.100 S13 13.539 5.960 2.00 28.32 S14 10.733 3.025 S15 infinity 0.500 1.52 64.21 S16 infinity 0.131 IMA infinity /

[0140] Example 2

[0141] The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The third lens L3 and the fourth lens L4 are cemented together to form a cemented lens. The aperture stop STO can be disposed between the second lens L2 and the third lens L3.

[0142] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0143] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0144] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0145] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0146] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0147] The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0148] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0149] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0150] Table 2 shows the basic parameters of the optical lens in Example 2.

[0151] Table 2

[0152]

[0153]

[0154] Example 3

[0155] The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0156] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0157] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0158] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0159] The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being concave.

[0160] The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0161] The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0162] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0163] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0164] Table 3 shows the basic parameters of the optical lens of Example 3.

[0165] Table 3

[0166]

[0167]

[0168] Example 4

[0169] The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0170] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0171] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0172] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0173] The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being concave.

[0174] The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0175] The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0176] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0177] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0178] Table 4 shows the basic parameters of the optical lens of Example 4.

[0179] Table 4

[0180] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -11.432 0.800 1.70 30.07 S2 20.862 0.350 S3 28.281 2.453 1.95 32.32 S4 -24.966 -0.461 STO infinity 5.673 S6 462.541 2.500 1.64 60.20 S7 -18.344 0.100 S8 11.686 6.003 1.61 60.59 S9 10251744.007 2.368 2.00 28.32 S10 110.679 1.473 S11 -104.281 5.977 1.50 81.61 S12 -7.960 0.209 S13 -7.432 5.555 2.00 20.71 S14 -177.221 1.375 S15 infinity 0.500 1.52 64.20 S16 infinity 0.125 IMA infinity /

[0181] Example 5

[0182] The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0183] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0184] The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave.

[0185] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0186] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0187] The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is concave.

[0188] The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0189] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0190] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0191] Table 5 shows the basic parameters of the optical lens of Example 5.

[0192] Table 5

[0193] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -14.504 1.553 1.81 22.69 S2 -25.021 0.526 S3 35.583 2.378 2.00 25.44 S4 720.655 0.067 STO infinity 8.904 S6 13.126 3.418 1.57 71.30 S7 -124.254 0.100 S8 10.508 3.208 1.69 53.35 S9 -69456.748 0.800 1.78 25.75 S10 7.216 0.890 S11 9.694 2.341 1.95 32.32 S12 25.221 1.588 S13 -11.927 5.727 1.76 26.61 S14 -339.980 1.375 S15 infinity 0.500 1.52 64.21 S16 infinity 0.125 IMA infinity /

[0194] Example 6

[0195] The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0196] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0197] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0198] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0199] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0200] The fifth lens L5 has negative optical power, and its first side surface S10 is concave, and its second side surface S11 is concave.

[0201] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0202] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0203] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0204] Table 6 shows the basic parameters of the optical lens of Example 6.

[0205] Table 6

[0206] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -13.019 0.600 1.69 26.33 S2 16.534 0.463 S3 24.799 2.572 1.92 24.32 S4 -25.236 0.989 STO infinity 0.022 S6 9.482 4.000 1.50 81.59 S7 -74.142 1.804 S8 17.834 3.380 1.68 57.50 S9 -30.671 1.113 S10 -10.081 3.000 3.66 58.74 S11 16.692 4.000 1.97 32.15 S12 -19.329 1.590 S13 -7.489 3.000 1.89 19.04 S14 -25.323 1.731 S15 infinity 0.500 1.52 64.20 S16 infinity 0.140 IMA infinity /

[0207] Example 7

[0208] The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0209] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0210] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0211] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0212] The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave.

[0213] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0214] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0215] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0216] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0217] Table 7 shows the basic parameters of the optical lens of Example 7.

[0218] Table 7

[0219]

[0220]

[0221] Example 8

[0222] The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0223] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0224] The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave.

[0225] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0226] The fourth lens L4 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0227] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0228] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0229] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0230] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0231] Table 8 shows the basic parameters of the optical lens of Example 8.

[0232] Table 8

[0233] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -12.069 2.316 1.92 20.88 S2 -14.491 0.100 S3 18.824 2.423 2.00 28.32 S4 33.196 0.406 STO infinity 2.314 S6 25.500 5.028 1.73 54.68 S7 -27.460 0.551 S8 -18.741 2.782 1.76 27.55 S9 8.880 5.500 1.75 50.95 S10 -31.203 1.052 S11 18.478 3.779 2.00 28.32 S12 -1403864.103 1.229 S13 -19.761 3.167 1.73 28.32 S14 16.949 2.228 S15 infinity 0.500 1.52 64.20 S16 infinity 0.129 IMA infinity /

[0234] Example 9

[0235] The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The third lens L3 and the fourth lens L4 are cemented together to form a cemented lens. The aperture stop STO can be disposed between the second lens L2 and the third lens L3.

[0236] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0237] The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave.

[0238] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0239] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0240] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0241] The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0242] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0243] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0244] Table 9 shows the basic parameters of the optical lens of Example 9.

[0245] Table 9

[0246] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -15.064 1.698 1.93 18.28 S2 -23.484 0.200 S3 21.462 2.648 1.94 19.18 S4 841.188 1.045 STO infinity 4.151 S6 21.462 3.604 3.42 83.34 S7 -15.933 1.500 1.80 21.22 S8 13.138 1.179 S9 41.113 3.681 1.88 40.76 S10 -37.746 0.624 S11 10.160 5.500 1.83 44.44 S12 7.937 0.959 S13 10.129 4.500 2.02 29.06 S14 12.375 3.029 S15 infinity 0.500 1.52 64.20 S16 infinity 0.125 IMA infinity /

[0247] Example 10

[0248] The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0249] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0250] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0251] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0252] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0253] The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is concave.

[0254] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0255] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0256] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0257] Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0258] Table 10

[0259] Face number Center radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -20.525 1.590 1.50 81.59 S2 100.000 0.665 S3 -36.864 1.618 1.99 23.83 S4 -70.000 0.220 STO infinity -0.020 S6 66.158 4.822 1.99 31.00 S7 -27.324 0.100 S8 13.319 3.823 3.52 88.58 S9 -17.309 2.104 1.92 24.29 S10 119.972 8.163 S11 17.329 5.066 1.95 33.78 S12 -25.068 1.809 S13 -10.494 3.041 1.95 17.94 S14 35.722 1.375 S15 infinity 0.500 1.52 64.20 S16 infinity 0.125 IMA infinity /

[0260] Example 11

[0261] The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0262] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0263] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0264] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0265] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0266] The fifth lens L5 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0267] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0268] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0269] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A filter IR and / or protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR and / or protective glass CG have a first side surface S15 and a second side surface S16.

[0270] Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0271] Table 11

[0272]

[0273]

[0274] like Figure 12a As shown, the MTF peak value of the center field of view of the optical lens in Example 1 reaches 0.7 at a spatial frequency of 119 LP / mm; Figure 13a As shown, the MTF peak value of the center field of view of the optical lens in Example 2 reaches 0.8 at a spatial frequency of 119 LP / mm; Figure 12b and Figure 13b As shown, both Embodiment 1 and Embodiment 2 exhibit relatively small distortion. The center field of view of the optical lenses in all embodiments of this application achieves a peak MTF of over 0.6 at a spatial frequency of 119 LP / mm, exhibiting relatively small distortion. They all meet the high resolution requirement of 8M (eight million) pixels and possess good imaging quality, which will not be elaborated further.

[0275] Table 12 provides the basic parameters of the optical lenses in Examples 1-11, as detailed in the table below.

[0276] Table 12

[0277]

[0278]

[0279] In summary, the relationships in each embodiment of Examples 1-11 satisfy the relationships shown in Table 13.

[0280] Table 13

[0281]

[0282]

[0283] This application also provides an electronic device, which includes a first device and / or a second device. The first device may be, for example, a lidar transmitter, and the second device may be, for example, a lidar receiver. The first device may include the optical lens and light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device may include the optical lens as described in the exemplary embodiments above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element is disposed on the second side of the optical lens (e.g., disposed on the imaging surface), and the imaging element may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0284] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power has a concave first side surface; A second lens with optical power; A third lens with positive optical power has a first convex side and a second convex side. A fourth lens with optical power; A fifth lens with optical power; A sixth lens with optical power; A seventh lens with optical power; At least one of the fourth lens, the fifth lens, and the sixth lens has positive optical power, and at least one of the lenses has negative optical power; The optical lens has seven lenses with optical power. The optical lens satisfies the following conditions: 0≤d12 / F≤0.045, 0≤d67 / TTL≤0.06, 0.01≤|(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)|≤1.5; Wherein, d12 is the air gap between the first lens and the second lens, F is the total focal length of the optical lens group, d67 is the air gap between the sixth lens and the seventh lens, TTL is the total optical length of the optical lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, and F7 is the focal length of the seventh lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies any one of the following characteristics: The second side surface of the first lens is either concave or convex; The second lens has negative optical power, with a first concave side and a second convex side; or, the second lens has negative optical power, with a first convex side and a second concave side; or, the second lens has positive optical power, with a first convex side and a second concave side; or, the second lens has positive optical power, with a first convex side and a second convex side. The fourth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or, the fourth lens has negative optical power, and its first side surface is convex, and its second side surface is concave; or, the fourth lens has positive optical power, and its first side surface is convex, and its second side surface is concave; or, the fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex. The fifth lens has negative optical power, and the first side of the fifth lens is concave and the second side of the fifth lens is concave; or, the fifth lens has negative optical power, and the first side of the fifth lens is convex and the second side of the fifth lens is concave; or, the fifth lens has positive optical power, and the first side of the fifth lens is convex. The sixth lens has negative optical power, a first side surface of the sixth lens is concave, and a second side surface of the sixth lens is convex; or, the sixth lens has negative optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave; or, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave; or, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is convex; or, the sixth lens has positive optical power, a first side surface of the sixth lens is concave, and a second side surface of the sixth lens is convex. The seventh lens has negative optical power, and the first side of the seventh lens is concave and the second side of the seventh lens is concave; or, the seventh lens has negative optical power, and the first side of the seventh lens is concave and the second side of the seventh lens is convex; or, the seventh lens has positive optical power, and the first side of the seventh lens is convex and the second side of the seventh lens is concave. The first lens through the seventh lens are all glass spherical lenses; The third lens is cemented with the fourth lens to form a cemented lens; or, the fourth lens is cemented with the fifth lens to form a cemented lens; or, the fifth lens is cemented with the sixth lens to form a cemented lens. The optical lens also includes an aperture stop, which is located between the second lens and the third lens.

3. The optical lens according to claim 1 or 2, characterized in that, The distance L (L1~STO) from the first side of the first lens to the center of the aperture on the optical axis satisfies the following condition with respect to the total optical length TTL of the optical lens: 0.05≤L(L1~STO) / TTL≤0.

165.

4. The optical lens according to claim 1 or 2, characterized in that, For the seventh lens, when the first side surface of the seventh lens is convex or the second side surface is concave, the sagittal height is a positive value, satisfying: Sag(D / 2) / n>Sag(D / 2) / (n+1); When the first side surface of the seventh lens is concave or the second side surface is convex, the sagittal value is negative, satisfying Sag(D / 2) / n. <Sag(D / 2) / (n+1); Wherein, Sag(D / 2) / n is the sag height at one-nth of the edge direction of the optical axis, and Sag(D / 2) / (n+1) is the sag height at one-n+1th of the edge direction of the optical axis.

5. The optical lens according to claim 1 or 2, characterized in that, The focal length F2 of the second lens and the total focal length F of the optical lens satisfy: 0.5≤|F2 / F|≤6.

6. The optical lens according to claim 1 or 2, characterized in that, The focal length F4 of the fourth lens satisfies the following condition with the total focal length F of the optical lens: -3≤F4 / F≤13.

7. The optical lens according to claim 1 or 2, characterized in that, The center thickness d1 of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.02≤d1 / F≤0.

18.

8. The optical lens according to claim 1 or 2, characterized in that, The radius of curvature R11 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: -1.4≤R11 / F≤-0.

6.

9. The optical lens according to claim 1 or 2, characterized in that, The radius of curvature R71 of the first side of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 0.2≤|R71 / F|≤1.

5.

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 an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

Images