Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment, and the optical lens sequentially comprises a first lens with negative focal power from a first side to a second side along an optical axis, and the first side surface of the first lens is a concave surface; the second lens has focal power; the third lens has positive focal power, and the first side surface of the third lens is a convex surface; the fourth lens has focal power; the fifth lens has focal power; the sixth lens has focal power; a seventh lens with focal power; wherein at least one of the fourth lens, the fifth lens and the sixth lens is a positive focal power lens and a negative focal power lens; the number of lenses with focal power in the optical lens is seven. The optical lens comprises a diaphragm; the diaphragm is positioned between the third lens and the imaging surface; the optical lens satisfies the following conditions:-1.8 < = F1 / F < =-0.4, 0.45 < = L (STO-IMG) / TTL < = 0.7, 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] With the continuous development of automotive intelligence and autonomous driving technologies, the market for automotive cameras continues to grow. In the coming years, the number of automotive cameras will increase significantly to meet higher levels of autonomous driving functions and safety requirements. Among them, forward-facing cameras, as key components for realizing ADAS (Advanced Driver Assistance Systems) and autonomous driving functions, are in particularly strong market demand.

[0003] Forward-facing cameras need to detect objects at medium to long distances, but imaging at medium to long distances requires a longer focal length, resulting in a larger lens size, which is not conducive to lens miniaturization.

[0004] Because real-world road detection scenarios are quite complex, requiring lenses to have good object recognition capabilities, the imaging quality of the lenses themselves is required to be high. Furthermore, to adapt to a wider range of application scenarios, high resolution has gradually become an urgent need.

[0005] Meanwhile, the CRA (Chief Ray Angle) design of the optical lens also needs to match the chip; an excessively large CRA can cause serious color cast issues. Existing optical lenses cannot meet the requirement of a small CRA. A smaller CRA avoids stray light from hitting the lens barrel when the light exits from the rear, and can also match the automotive chip well, without causing color cast or vignetting.

[0006] Therefore, the market currently needs an optical lens that combines high resolution with miniaturization, high resolution, and small CRA to meet the needs of autonomous driving applications. Summary of the Invention

[0007] The first aspect of this application provides an optical lens comprising, along an optical axis from a first side to a second side, a first lens having negative optical power, the first side of which is concave; a second lens having optical power; a third lens having positive optical power, the first side of which is convex; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; and a seventh lens having optical power; wherein at least one of the fourth, fifth, and sixth lenses is a positive optical power lens and a negative optical power lens; the optical lens comprises seven lenses having optical power; and the optical lens includes an aperture stop located at the third side. Between the lens and the imaging plane; the optical lens satisfies: -1.8≤F1 / F≤-0.4, 0.45≤L(STO~IMG) / TTL≤0.7, 0.01≤|(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)|≤1.5; where F1 is the focal length of the first lens, F is the total focal length of the optical lens group, L(STO~IMG) is the center distance on the optical axis from the aperture stop of the optical lens to the imaging plane, 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.

[0008] According to an exemplary embodiment of this application, an optical lens satisfies any one of the following features: the second side surface of the first lens is concave; or, the second side surface of the first lens is convex; the second lens has positive optical power, its first side surface is concave and its second side surface is convex; or, the second lens has positive optical power, its first side surface is convex and its second side surface is convex; or, the second lens has negative optical power, its first side surface is convex and its second side surface is concave; the second side surface of the third lens is concave; or, the second side surface of the third lens is convex; the fourth lens has positive optical power, its first side surface is convex and its second side surface is concave; or, the fourth lens has positive optical power, its first side surface is concave and its second side surface is convex; or, the fourth lens has positive optical power, its first side surface is concave and its second side surface is convex; or, the fourth lens has negative optical power, its first side surface is concave and its second side surface is concave; the fifth lens has negative optical power, its first side surface is concave and its second side surface is concave; the second lens has positive optical power, its first side surface is concave and its second side surface is concave; the third lens has a concave second side surface, its second side surface is concave; the third lens has a concave second side surface, its second side surface is concave; the fourth lens has positive optical power, its first side surface is concave and its second side surface is concave; the fifth lens has negative optical power, its first side surface is concave and its second side surface is concave; the fifth lens has negative optical power, its first side surface is concave and its second side surface is concave; the sixth lens has a concave second side surface, its first side surface is concave and its second side surface is concave; the seventh lens has positive optical power, its first side surface is concave and its second side surface is concave; the fifth lens has negative optical power, its first side surface The fifth lens has a concave surface on its first side and a concave surface on its second side; or, the fifth lens has a negative optical power, with a convex surface on its first side and a concave surface on its second side; or, the fifth lens has a positive optical power, with a convex surface on its first side and a convex surface on its second side; the sixth lens has a negative optical power, with a concave surface on its first side and a concave surface on its second side; or, the sixth lens has a negative optical power, with a concave surface on its first side and a convex surface on its second side; or, the sixth lens has a positive optical power, with a concave surface on its first side and a convex surface on its second side; or, the sixth lens has a positive optical power, with a convex surface on its first side and a convex surface on its second side; the seventh lens has a negative optical power, with a concave surface on its first side and a concave surface on its second side; or, the seventh lens has a negative optical power, with a convex surface on its first side and a concave surface on its second side; or, the seventh lens has a positive optical power, with a convex surface on its first side and a concave surface on its second side.

[0009] According to an exemplary embodiment of this application, 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.

[0010] According to an exemplary embodiment of this application, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all glass spherical lenses.

[0011] According to an exemplary embodiment of this application, the aperture stop is disposed between the third lens and the fourth lens.

[0012] According to an exemplary embodiment of this application, the aperture stop is disposed between the fourth lens and the fifth lens.

[0013] According to an exemplary embodiment of this application, 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≤0.17.

[0014] According to an exemplary embodiment of this application, the air gap d23 between the second lens and the third lens and the total optical length TTL of the optical lens satisfy: 0.001≤d23 / TTL≤0.016.

[0015] According to an exemplary embodiment of this application, the radius of curvature of the first side of the seventh lens and the total focal length F of the optical lens satisfy: 0.2≤|R71 / F|≤1.35.

[0016] According to an exemplary embodiment of this application, 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 satisfy: 1.5≤F / H≤1.8.

[0017] According to an exemplary embodiment of this application, the air gap d12 between the first lens and the second lens and the total focal length F of the optical lens satisfy: 0.015≤d12 / F≤0.085.

[0018] According to an exemplary embodiment of this application, the radius of curvature R11 of the first side surface of the first lens and the total focal length F of the optical lens satisfy: -2≤R11 / F≤-0.65.

[0019] According to an exemplary embodiment of this application, the radius of curvature R72 of the second side of the seventh lens and the total focal length F of the optical lens satisfy: 0.2≤|R72 / F|≤6.5.

[0020] According to an exemplary embodiment of this application, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy: 1≤|F2 / F|≤3.

[0021] According to an exemplary embodiment of this application, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy: 0.6≤F3 / F≤1.8.

[0022] 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≤1.5.

[0023] According to an exemplary embodiment of this application, the center thickness d2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 0.005≤d2 / F≤0.35.

[0024] According to an exemplary embodiment of the present application, the air gap d34 between the third lens and the fourth lens and the overall focal length value F of the optical lens satisfy: 0 ≤ d34 / F ≤ 0.7.

[0025] According to an exemplary embodiment of the present application, 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 satisfies: 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 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 from the center to the edge direction, and Sag(D / 2) / (n + 1) is the sagittal height at one-(n + 1)-th of the optical axis from the center to the edge direction.

[0026] According to an exemplary embodiment of the present application, the optical lens satisfies any one of the following relationships:

[0027] 0.1 ≤ MAX(d34, d56) / F ≤ 0.6, 0.006 ≤ d12 / TTL ≤ 0.04, -0.3 ≤ SAG11 / (D11 / 2) ≤ -0.1, 0.2 ≤ |F4 / F| ≤ 3, 0.15 ≤ |F5 / F| ≤ 1.3, 0.1 ≤ |F6 / F| ≤ 3, 0.5 ≤ |F7 / F| ≤ 100, 0.005 ≤ F*(1 / F1 + 1 / F2 + 1 / F3) ≤ 1, -1.3 ≤ (1 / F1 + 1 / F2)*F ≤ -0.05, 0.05 ≤ d1 / d2 ≤ 2.5, 0 ≤ |(H - F*θ) / (F*θ)| ≤ 0.05, 0.06 ≤ D11 / H / F×1mm ≤ 0.12, 50° ≤ (FOV×F) / H ≤ 65°, 5 ≤ TTL / H / θ ≤ 8, 1.5 ≤ TTL / F ≤ 3, 0.28 ≤ D11 / TTL ≤ 0.42, 0.8 ≤ D11 / Dmax(L2~L7) ≤ 1.1, -3 ≤ R11 / D11 ≤ -0.5, -1 ≤ R11 / TTL ≤ -0.1, 0.7 ≤ d1 / d12 ≤ 10, 0.05 ≤ 丨R71 / R72丨 ≤ 2, 0.1 ≤ 丨SAG71 / (D71 / 2)丨 ≤ 0.4, 0.6 ≤ R31 / F3 ≤ 1.3, 0 ≤ d2 / F ≤ 0.23, 0.12 ≤ d34 / F ≤ 0.6, 0.25 ≤ MAX(d34, d56) / F ≤ 0.6, 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 and satisfies Sag(D / 2) / n > Sag(D / 2) / (n + 1), or when the first side is concave or the second side is convex, the sagittal height is negative and satisfies Sag(D / 2) / n < Sag(D / 2) / (n + 1);

[0028] Where d12 is the air gap between the first and second lenses, TTL is the total optical length of the optical lens, SAG11 is the sag corresponding to the maximum effective aperture of the first side of the first lens at the maximum field of view of the optical lens, D11 is the maximum effective aperture of the first side of the first lens at the maximum field of view of the optical lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third 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, F7 is the focal length of the seventh lens, F is the total focal length of the optical lens group, d1 is the center thickness of the first lens, d2 is the center thickness of the second 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, FOV is the maximum field of view of the optical lens, Dmax(L 2~L7) is the maximum value of the maximum effective light-transmitting aperture of the second to seventh lenses corresponding to the maximum field of view of the optical lens. R11 is the radius of curvature of the first side of the first lens. R71 is the radius of curvature of the first side of the seventh lens. R72 is the radius of curvature of the second side of the seventh lens. SAG71 is the sag corresponding to the maximum effective light-transmitting aperture of the first side of the seventh lens corresponding to the maximum field of view of the optical lens. D71 is the maximum effective light-transmitting aperture of the first side of the seventh lens corresponding to the maximum field of view of the optical lens. R31 is the radius of curvature of the first side of the third lens. 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.

[0029] According to an exemplary embodiment of this application, the optical lens satisfies any one of the following relationships:

[0030] 0.551 ≤ L(STO~IMG) / TTL ≤ 0.700, 0.042 ≤ d1 / F ≤ 0.160, 0.020 ≤ d12 / F ≤ 0.079, 0.008 ≤ d12 / TTL ≤ 0.034, 0.003 ≤ d23 / TTL ≤ 0.015, -1.685 ≤ R11 / F ≤ -0.761, 0.515 ≤ |R71 / F| ≤ 1.200, 0.652 ≤ |R72 / F| ≤ 6.000, -1.600 ≤ F1 / F ≤ -0.773, 1.200 ≤ |F2 / F| ≤ 2.500, 0.692 ≤ F3 / F ≤ 1.600, 1.287 ≤ D11 / D72 ≤ 1.481, -0.288 ≤ SAG11 / (D11 / 2) ≤ -0.120, 0.074 ≤ d2 / F ≤ 0.297, 0.006 ≤ d34 / F ≤ 0.497, 0.141 ≤ MAX(d34, d56) / F ≤ 0.497, 0.447 ≤ |F4 / F| ≤ 2.285, 0.330 ≤ |F5 / F| ≤ 0.931, 0.261 ≤ |F6 / F| ≤ 2.400, 0.716 ≤ |F7 / F| ≤ 95.361, 0.009 ≤ F*(1 / F1 + 1 / F2 + 1 / F3) ≤ 0.865, -1.072 ≤ (1 / F1 + 1 / F2)*F ≤ -0.078, 0.221 ≤ d1 / d2 ≤ 1.871, 0 ≤ |(H - F*θ) / (F*θ)| ≤ 0.037, 1.622 ≤ F / H ≤ 1.729, 0.085 ≤ D11 / H / F×1mm ≤ 0.098, 55.823° ≤ (FOV×F) / H ≤ 59.511°, 6.035 ≤ TTL / H / θ ≤ 7.128, 2.178 ≤ TTL / F ≤ 2.494, 0.314 ≤ D11 / TTL ≤ 0.383, 0.899 ≤ D11 / Dmax(L2~L7) ≤ 0.987, -2.122 ≤ R11 / D11 ≤ -0.939, -0.749 ≤ R11 / TTL ≤ -0.309, 0.923 ≤ d1 / d12 ≤ 8.001, 0.100 ≤ |R71 / R72| ≤ 1.347, 0.129 ≤ |SAG71 / (D71 / 2)| ≤ 0.296, 0.741 ≤ R31 / F3 ≤ 1.163, 0.03 ≤ |(1 / F4 + 1 / F5 + 1 / F6 + 1 / F7) / (1 / F)| ≤ 0.895;

[0031] Where F is the total focal length of the optical lens, TTL is the total optical length of the optical lens, FOV is 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, H is the image height corresponding to the maximum field of view of the optical lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third 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, F7 is the focal length of the seventh lens, R11 is the radius of curvature of the first side surface of the first lens, R31 is the radius of curvature of the first side surface of the third lens, R71 is the radius of curvature of the first side surface of the seventh lens, R72 is the radius of curvature of the second side surface of the seventh lens, d1 is the center thickness of the first lens, d12 is the air gap between the first and second lenses, d2 is the center thickness of the second lens, and 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, L(STO~IMG) is the center distance on the optical axis from the aperture stop to the imaging plane 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, 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, 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, SAG71 is the sag 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(D / 2) / n is the sag at the nth point of the optical axis along the edge direction, and Sag(D / 2) / (n+1) is the sag at the (n+1)th point of the optical axis along the edge direction.

[0032] 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.

[0033] 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; the fourth lens has optical power; the fifth lens has optical power; the sixth lens has optical power; and the seventh lens has optical power; at least one of the fourth, fifth, and sixth lenses is a positive optical power lens and one negative optical power lens.

[0034] The first lens has negative optical power to diverge light, preventing premature convergence and facilitating multiple aberration corrections by subsequent lenses. Its concave first side collects and diffuses object-side light, preventing excessive concentration and thus better controlling aberrations and sensitivity. By controlling the focal length F1 of the first lens relative to the overall focal length F of the optical lens (-1.8 ≤ F1 / F ≤ -0.4), the first lens has a smaller focal length, resulting in stronger light refraction and better light collection. This reduces the front aperture while improving resolving performance. It also facilitates reducing the air gap between the first and second lenses, and between the second and third lenses, shortening the time-to-live (TTL). The concave first side of the first lens also helps achieve telephoto capabilities.

[0035] The diverging rays exiting the first lens enter the second and third lenses. The third lens, with positive optical power, rapidly converges the diverging rays, altering their trajectory and bringing them closer to the optical axis. This facilitates smooth entry into the rear optical system, reducing the rear aperture, shortening the time-to-light (TTL), and improving resolution. The first side of the third lens is convex, converging the rays from the preceding lenses, reducing spherical aberration, lowering the edge ray height, and reducing the TTL.

[0036] An optical lens includes an aperture stop located between the third lens and the image plane. By controlling the center distance L(STO~IMG) between the aperture stop and the image plane on the optical axis and the total optical length (TTL) of the lens, i.e., 0.45≤L(STO~IMG) / TTL≤0.7, the aperture stop is positioned further back in the optical lens, closer to the image plane. Properly controlling the distance between the aperture stop and the image plane can effectively gather edge rays, correct coma and spherical aberration, improve resolution, and reduce CRA. It also facilitates the reduction of the aperture diameter of subsequent lenses, meeting the requirements of a smaller rear-end configuration.

[0037] The light rays exiting the third lens enter the fourth, fifth, sixth, and seventh lenses. By controlling the focal lengths of the fourth lens (F4), fifth lens (F5), sixth lens (F6), and seventh lens (F7) with the overall focal length F of the optical lens, i.e., 0.01 ≤ |(1 / F4 + 1 / F5 + 1 / F6 + 1 / F7) / (1 / F)| ≤ 1.5, it is beneficial for the light to smoothly transition at the rear of the lens, smoothly enter the imaging plane, reduce light loss, effectively correct aberrations, and achieve high resolution. Attached Figure Description

[0038] 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.

[0039] Figure 1A schematic diagram is shown showing the sag(D / 2) / n at one-nth of the optical axis along the edge of the lens and the sag(D / 2) / (n+1) at one-nth of the optical axis along the edge of the lens;

[0040] Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0041] Figure 3 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown.

[0042] Figure 4 The F-Tan (Theta) distortion curve of the optical lens according to Embodiment 1 of this application is shown;

[0043] Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0044] Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0045] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown;

[0046] Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown;

[0047] Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown;

[0048] Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown;

[0049] Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown;

[0050] Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown;

[0051] Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The features, principles, and other aspects of this application are described in detail below.

[0060] 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.

[0061] In an exemplary embodiment, the optical lens can be used as, for example, an imaging lens, where a first side of the optical lens can be the object side and a second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is provided with an imaging surface.

[0062] 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.

[0063] 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. A 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 can refer to the object side, and "second side" can refer to the light source side. In some possible implementations, the optical lens provided in this application can also simultaneously perform the functions of light receiving and light emitting.

[0064] For example, the optical lens provided in this application is used in a lidar system that uses a shared optical path for both transmitting and receiving laser 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 transmits modulated optical signals and receives radar echo beams.

[0065] 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 negative optical power of the first lens is used to diverge light rays, preventing them from converging prematurely and facilitating multiple corrections of aberrations by subsequent lenses. The concave first side surface of the first lens collects light rays from the object side and then diverges them appropriately, preventing excessive concentration of light rays, thereby allowing for better control of aberrations and sensitivity. The convex second side surface of the first lens converges the light rays from the first side, reducing spherical aberration and distributing the effect of subsequent lenses in correcting spherical aberration.

[0066] 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 negative optical power of the first lens is used to diverge light rays, preventing premature convergence and facilitating multiple aberration corrections by subsequent lenses. The concave first side surface of the first lens collects object-side light rays and then diverges them appropriately, preventing excessive light concentration, thereby achieving better control over aberrations and sensitivity. The concave second side surface of the first lens prevents excessive light convergence, reduces the optical path of edge rays to the second lens, reduces the impact of lens eccentricity tolerance, and thus reduces sensitivity.

[0067] 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 has positive optical power, converging the light rays diverging from the first lens, which helps reduce the rear aperture. Simultaneously, it appropriately controls the light path, beginning to correct aberrations such as spherical aberration, laying the foundation for performance improvement and achieving high resolution. The first side surface of the second lens is convex, used to converge the light rays emitted from the first lens, correcting spherical aberration, while avoiding the problem of an excessively large front aperture caused by excessive light divergence. The second side surface of the second lens is convex, working in conjunction with the first side surface to further converge the light rays, allowing for reasonable convergence of light rays from the edge field of view, which is beneficial for reducing coma.

[0068] In an exemplary embodiment, the second 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 positive optical power of the second lens converges the light rays diverging from the first lens, which helps reduce the rear aperture and appropriately controls the light path, beginning to correct aberrations such as spherical aberration, thus laying the foundation for performance improvement and achieving high resolution. The concave first side surface of the second lens receives the light rays emitted from the first lens, sharing the divergence pressure of the first lens and avoiding aberrations and excessive sensitivity caused by the first lens's excessive optical power. The convex second side surface of the second lens allows for reasonable convergence of light rays from the edge field of view, which helps reduce coma.

[0069] 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 negative optical power of the second lens further diverges the light rays emitted by the first lens, paving the way for the positive optical power of the third lens to converge the light rays. This also helps increase the light transmission of the optical lens and improve resolution. The convex first side surface of the second lens is used to converge the light rays emitted from the first lens, correcting spherical aberration, and avoiding the problem of an excessively large front aperture caused by excessive light divergence. The concave second side surface of the second lens can appropriately further diverge the light rays, facilitating a smooth transition of light to subsequent lenses and improving performance and sensitivity.

[0070] 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, having positive optical power, rapidly converges light rays that generally diverge in front, changing the light trajectory and bringing the light closer to the optical axis. It is a key light inflection point in this optical lens architecture, facilitating the smooth entry of light into the rear optical system, reducing the rear aperture, shortening the TTL, and improving resolution. The first side surface of the third lens is convex, converging the light rays from the preceding lens, reducing spherical aberration, lowering the edge ray height, and reducing the TTL. The second side surface of the third lens is also convex, further converging the light rays, and simultaneously forming a biconvex structure with the first convex side surface, reducing the deflection of incident and outgoing light rays and lowering sensitivity.

[0071] 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, concave. The third lens, having positive optical power, rapidly converges light rays that generally diverge in front, changing the light trajectory and bringing the light closer to the optical axis. It is a key light inflection point in this optical lens architecture, facilitating the smooth entry of light into the rear optical system, reducing the rear aperture, shortening the TTL, and improving resolution. The first side surface of the third lens is convex, converging the light rays from the preceding lens, reducing spherical aberration, lowering the edge ray height, and reducing the TTL. The second side surface of the third lens is concave, reasonably dispersing the light rays converged from the first side, avoiding excessive convergence of light, which helps increase light transmission and achieve a large aperture and a small FNO (F-Number).

[0072] 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, having positive optical power, further converges light rays, preparing for the concentration of rear light rays and facilitating the realization of a small rear aperture; simultaneously, it shares the converging pressure of the third lens, reducing optical lens sensitivity and improving image quality. The first side surface of the fourth lens is convex, which is beneficial for converging light rays emitted through the third lens, reducing the light beam height, decreasing the size of the rear lens group, and achieving miniaturization; the second side surface of the fourth lens is convex, which can cooperate with the first side surface to achieve greater converging capability, share more optical power, and reduce the pressure on other lenses.

[0073] 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 positive optical power of the fourth lens further converges light rays, preparing for the concentration of rear light rays and facilitating the realization of a small rear aperture; simultaneously, it shares the converging pressure of the third lens, reducing the sensitivity of the optical lens and improving image quality. The convexity of the first side surface of the fourth lens helps to converge the light rays emitted through the third lens, reducing the light beam height, decreasing the size of the rear lens group, and achieving miniaturization; the concaveness of the second side surface of the fourth lens allows for reasonable adjustment of the divergence of light rays in the edge field of view, increasing the angle between the upper and lower light rays in the edge field of view, and improving relative illumination. At the same time, it appropriately diverges light rays, widening the gaps between edge light rays and reducing distortion.

[0074] In an exemplary embodiment, the fourth 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 positive optical power of the fourth lens further converges light rays, preparing for the focusing of rear light rays, which is beneficial for achieving a small rear aperture; at the same time, it shares the converging pressure of the third lens, reducing the sensitivity of the optical lens and improving image quality. The concave first side surface of the fourth lens appropriately corrects and diffracts the incoming light rays, which is beneficial for correcting spherical aberration and improving resolution. The convex second side surface of the fourth lens appropriately converges light rays, which is beneficial for achieving a small rear aperture.

[0075] 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 negative optical power of the fourth lens appropriately diverges light rays, widens the gaps between peripheral light rays, reduces distortion, and improves resolution. The biconcave shape of the fourth lens is beneficial for correcting aberrations, allowing the central and peripheral field rays to return to their ideal positions, thereby improving resolution.

[0076] 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 negative optical power of the fifth lens appropriately diverges light rays, adjusts the trajectory of edge rays, reduces distortion, and improves image quality. The concave first side surface of the fifth lens, by diverging light rays, can be used to balance the remaining spherical aberration of the preceding optical lens, increasing the light transmission of the optical lens and achieving high resolution. The concave second side surface of the fifth lens further diverges light rays, raises the light beam height, enlarges the image plane, and improves relative illumination, thus achieving high resolution.

[0077] 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 has negative optical power, appropriately diverging light, adjusting the trajectory of edge rays, reducing distortion, and improving image quality. The first side surface of the fifth lens is convex, used for light collection by the optical lens, gathering forward light, and its cooperating second side surface (concave) adjusts and balances spherical aberration and coma, improving resolution. The second side surface of the fifth lens is concave, further diverging light, allowing light to smoothly enter the rear optical lens, reducing the sensitivity of the optical lens, and improving resolution quality.

[0078] 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, having positive optical power, can control the light beam height, thereby reducing the light beam and decreasing the lens volume. Simultaneously, it filters out poorly resolving images in the outer field of view, thus reducing costs and improving resolution. The fifth lens is biconvex, further converging the light beam and reducing the rear aperture.

[0079] 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, having positive optical power, further effectively converges incoming light rays, causing the light rays to be deflected along the optical axis, thus reducing the rear aperture. The first side surface of the sixth lens is convex, adjusting the height of the rear group of rays, reducing the light deflection pressure on the seventh lens, and working in conjunction with the seventh lens to ensure that light rays accurately enter the imaging plane. The second side surface of the sixth lens is convex, further converging the light rays, reducing central and peripheral aberration differences, and improving resolution.

[0080] 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 positive optical power of the sixth lens further effectively converges incoming light rays, causing the light rays to be deflected along the optical axis, thus reducing the rear aperture. The concave first side surface of the sixth lens can better transmit light rays, reduce optical lens sensitivity, balance spherical aberration and coma, and improve resolution. The convex second side surface of the sixth lens appropriately converges light rays, reduces central and peripheral aberration differences, and improves resolution.

[0081] 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, concave. The negative optical power of the sixth lens allows light to diverge more effectively into the rear lens, adjusting the height of peripheral rays on the image plane, which helps improve the Chief Ray Angle (CRA) and enhances image quality. The concave first side surface of the sixth lens better facilitates light transmission, reduces optical lens sensitivity, and improves resolution. The concave second side surface of the sixth lens makes the light entering the seventh lens smoother, reducing spatial sensitivity at that location and improving resolving performance.

[0082] 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 negative optical power of the sixth lens allows light to diverge more effectively into the rear lens, adjusting the height of peripheral rays on the image plane, which helps improve CRA (Collateral Resonance Aspect Ratio) and image quality. The concave first side surface of the sixth lens better facilitates light transmission, reduces optical lens sensitivity, and improves resolution. The convex second side surface of the sixth lens appropriately converges light, reducing the rear aperture.

[0083] 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, with its positive optical power, further converges and adjusts the light rays in front, bringing them closer to the imaging plane, achieving miniaturization, reducing light loss, and better converging the light onto the image plane, correcting spherical aberration, and improving image quality. The first side surface of the seventh lens is convex, correcting optical lens aberrations, adjusting optical path differences across fields of view, and balancing resolution. The second side surface of the seventh lens is concave, further diverging the light rays, improving edge illumination, and enhancing CRA (Corrective Aberration Reduction).

[0084] In an exemplary embodiment, the seventh lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, convex. The seventh lens, with its negative optical power, diverges the light rays emitted by the sixth lens, further adjusting the divergence of the forward light rays, increasing the illumination of the peripheral field of view, correcting distortion, improving CRA, and enhancing resolution quality. The concave first side of the seventh lens further diverges the light rays, allowing them to reach a higher imaging position, achieving large image plane imaging, improving image quality, and simultaneously correcting optical lens aberrations, correcting optical path differences in different fields of view, and balancing resolution. The convex second side of the seventh lens lowers the light beam height, reduces field curvature, coma, and other primary aberrations, improves resolution, and ensures that the CRA is not excessive, reducing the risk of color cast in the image.

[0085] 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, having negative optical power, diverges the light rays emitted by the sixth lens, further adjusting the divergence of the forward light rays, increasing the illumination of the peripheral field of view, reducing distortion, improving CRA, and enhancing resolution quality. The first side surface of the seventh lens is concave, further diverging the light rays so that they can reach a higher imaging position, achieving large image plane imaging, improving image quality, and simultaneously correcting optical lens aberrations, correcting optical path differences in different fields of view, and balancing resolution. The second side surface of the seventh lens is concave, further diverging the light rays, increasing edge illumination, and simultaneously achieving a large image plane.

[0086] In an exemplary embodiment, the seventh 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 seventh lens, with its negative optical power, diverges the light emitted from the sixth lens, further adjusting the divergence of forward light, increasing the illumination of the peripheral field of view, correcting distortion, improving CRA, and enhancing resolution quality. The first side surface of the seventh lens, being convex, corrects optical lens aberrations, adjusts optical path differences across fields of view, and balances resolution. The second side surface of the seventh lens, being concave, further diverges light, increasing edge illumination and improving CRA.

[0087] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the third lens and the fourth lens or between the fourth lens and the fifth lens. By placing an aperture stop between the third lens and the fourth lens or between the fourth lens and the fifth lens, it is beneficial to effectively converge the light entering the optical lens, reduce the lens aperture at the rear end of the optical lens, and decrease the assembly sensitivity of the optical lens. It should be understood that placing the aperture stop between the third lens and the fourth lens or between the fourth lens and the fifth lens is merely exemplary, and this application does not impose specific limitations on it. The aperture stop may be placed in other positions as needed.

[0088] In an exemplary embodiment, the fourth and fifth lenses can form a cemented lens, and the fifth and sixth lenses can also form a cemented lens. Light rays diverge after passing through the first and second lenses, and the third lens rapidly converges the light rays, achieving a change in the light's trajectory. This introduces a significant optical path difference, making it difficult to completely eliminate chromatic aberration. Setting two of the fourth 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, resolution can be improved, and optical performance such as distortion and CRA can be optimized. The use of cemented lenses allows for the full correction of various aberrations in optical lenses. While maintaining a compact structure, it improves resolution and optimizes optical performance such as distortion and CRA (Corrective Aberration Reduction). Cemented negative lenses have a higher refractive index (compared to positive lenses), enabling light to converge effectively and smoothly at the final image, ensuring a stable arrival at the imaging plane and reducing overall weight and cost. Cemented lenses reduce light loss caused by reflections between lens elements. The combination of high and low refractive indices facilitates a rapid transition of light from the front, allowing for a larger aperture and increased light transmission. The use of cemented lenses reduces the air gap between two lens elements, resulting in a more compact overall optical lens structure. Furthermore, the use of cemented lenses reduces tolerance sensitivity issues such as tilting / eccentricity that occur during the assembly of individual lens units. Finally, the assembly method for the entire lens group reduces the number of assembly steps.

[0089] In an exemplary embodiment, the first to seventh lenses of the optical lens can preferably be all-glass spherical lenses, which effectively reduces 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.

[0090] 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, provide a protective glass between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0091] 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).

[0092] In an exemplary embodiment, the center distance L(STO~IMG) between the aperture stop and the imaging plane on the optical axis of the optical lens satisfies the following condition: 0.45≤L(STO~IMG) / TTL≤0.7. Preferably, 0.551≤L(STO~IMG) / TTL≤0.700. The total optical length TTL of the optical lens is the distance from the object-side center of the first lens to the center of the imaging focal plane. Since the aperture stop is located further back in the optical lens and closer to the imaging plane, controlling this relationship allows for proper management of the distance from the aperture stop to the imaging plane, effectively converging edge rays, correcting coma and spherical aberration, improving resolution, and reducing CRA. This also facilitates a reduction in the aperture of subsequent lenses, meeting the requirement for a smaller rear end. The preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0093] In an exemplary embodiment, 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 ≤ 0.17. Preferably, 0.042 ≤ d1 / F ≤ 0.160. The center thickness d1 of the first lens is the center distance on the optical axis from the first side surface to the second side surface of the first lens. By controlling this relationship, the thickness of the first lens can be reasonably controlled within a small range, which is beneficial for achieving a small TTL (Time To Live) capability; at the same time, it reduces the optical path length of light within the lens, making the light deviation between the second side surface and the first side surface smaller, thus reducing the sensitivity of the optical lens. The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0094] In an exemplary embodiment, the air gap d12 between the first lens and the second lens satisfies the following relationship with the overall focal length F of the optical lens: 0.015 ≤ d12 / F ≤ 0.085. Preferably, 0.020 ≤ d12 / F ≤ 0.079. The air gap d12 is the center distance on the optical axis between the second side surface of the first lens and the first side surface of the second lens. By controlling this relationship, a smaller air gap between the first and second lenses allows for timely light collection after the light from the first lens diverges, effectively reducing the lens aperture and TTL, while also reducing light loss and increasing light transmission. A preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0095] 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 satisfy the following condition: 0.006 ≤ d12 / TTL ≤ 0.04. Preferably, 0.008 ≤ d12 / TTL ≤ 0.034. By controlling this relationship, a smaller air gap between the first and second lenses is beneficial for shortening the total length of the optical lens and for controlling the optical path between the first and second lenses, preventing excessive unwanted light from entering, correcting coma, and achieving high resolution. The preferred range provides better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0096] In an exemplary embodiment, the air gap d23 between the second and third lenses and the total optical length (TTL) of the optical lens satisfy the following condition: 0.001 ≤ d23 / TTL ≤ 0.016. Preferably, 0.003 ≤ d23 / TTL ≤ 0.015. The air gap d23 between the second and third lenses is the center distance on the optical axis between the second side surface of the second lens and the first side surface of the third lens. By controlling this relationship, a small air gap between the second and third lenses, combined with the convex first side surface of the third lens, allows the third lens to better collect light, reduce light loss, and increase light transmission. Simultaneously, it avoids excessive divergence of light from the front, alleviates the converging pressure on the third lens, reduces the sensitivity of the optical lens, and improves image quality. Furthermore, by reasonably compressing the air gap between the second and third lenses, a short TTL is achieved while maintaining high resolution. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization of the optical lens.

[0097] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens satisfies the following relationship with the overall focal length F of the optical lens: -2 ≤ R11 / F ≤ -0.65. Preferably, -1.685 ≤ R11 / F ≤ -0.761. By controlling this relationship, the first side surface of the first lens is concave, and the R11 value is small, resulting in strong light processing capability. This facilitates the re-divergence of incident light, thereby adjusting spherical aberration and limb coma, which is beneficial for the subsequent lens to receive light and reduces the sensitivity of the optical lens. Reasonable control of R11 helps achieve low distortion in the optical lens. A preferred range yields better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0098] In an exemplary embodiment, the radius of curvature R71 of the first side of the seventh lens and the overall focal length F of the optical lens satisfy the following condition: 0.2 ≤ |R71 / F| ≤ 1.35. Preferably, 0.515 ≤ |R71 / F| ≤ 1.200. By controlling this relationship, a smaller R71 value can better adjust the direction of light, allowing light to enter the imaging plane smoothly, improving CRA, and enhancing image quality while maintaining miniaturization. Simultaneously, it can effectively deflect light, resulting in better transition of edge light, correcting coma, and improving resolution. Furthermore, it can adjust the optical path length of the central and edge fields of view, achieving low lens distortion. A preferred range yields better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0099] In an exemplary embodiment, the radius of curvature R72 of the second side surface of the seventh lens and the overall focal length F of the optical lens satisfy the following condition: 0.2 ≤ |R72 / F| ≤ 6.5. Preferably, 0.652 ≤ |R72 / F| ≤ 6.000. By controlling this relationship, a smaller R72 value can be achieved, effectively adjusting the angle at which the principal ray enters the image plane, thus realizing a small CRA (Curvature Radius Aspect Ratio). Simultaneously, it allows for effective processing of the light entering the imaging plane, improving distortion and relative illumination, and enhancing image quality. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization of the optical lens.

[0100] In an exemplary embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -1.8 ≤ F1 / F ≤ -0.4. Preferably, -1.600 ≤ F1 / F ≤ -0.773. By controlling this relationship, a smaller F1 value results in stronger light deflection capability, which is beneficial for light collection, reducing the front aperture while improving resolution performance. This also paves the way for reducing the air gap between the first and second lenses, and between the second and third lenses, thus shortening the time-to-live (TTL). The concave first side of the first lens facilitates telephoto lenses. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0101] In an exemplary embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy: 1 ​​≤ |F2 / F| ≤ 3. Preferably, 1.200 ≤ |F2 / F| ≤ 2.500. By controlling this relationship, a smaller F2 value can effectively transmit light to the third lens, balance edge field-of-view aberrations, and improve resolution while ensuring high light transmission. It can also alleviate the light processing burden on the first and third lenses, reduce the sensitivity of the optical lens, and improve image quality. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0102] In an exemplary embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: 0.6 ≤ F3 / F ≤ 1.8. Preferably, 0.692 ≤ F3 / F ≤ 1.600. By controlling this relationship, the third lens is positive, and the F3 value is relatively small, which can quickly converge light, allowing the light to enter the rear optical lens smoothly. This effectively reduces optical lens aberrations, corrects spherical aberration, improves image quality, and balances the small aperture and miniaturization of the rear end. The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0103] 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 satisfy: 1 ​​≤ D11 / D72 ≤ 1.5. Preferably, 1.287 ≤ D11 / D72 ≤ 1.481. By controlling this relationship, the aperture sizes of the first and seventh lenses are reasonable and similar, enabling miniaturization of the optical lens while maintaining a reasonable aperture distribution among the lenses. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization in the optical lens.

[0104] 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 satisfies the following condition: -0.3 ≤ SAG11 / (D11 / 2) ≤ -0.1. Preferably, -0.288 ≤ SAG11 / (D11 / 2) ≤ -0.120. 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 rays, adjusting the light trend, improving resolution performance, and at the same time, it can better reduce the aperture of the first lens. The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0105] In an exemplary embodiment, the center thickness d2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 0.005 ≤ d2 / F ≤ 0.35. Preferably, 0.074 ≤ d2 / F ≤ 0.297. The center thickness d2 of the second lens is the center distance on the optical axis between the first and second sides of the second lens. By controlling this relationship, the center thickness of the second lens can be reasonably controlled, which is beneficial for adjusting the angle of light rays emitted from the first lens after passing through the second lens and entering the third lens; it also facilitates the convergence of light rays by the third lens, balances aberrations, and improves resolution. Furthermore, 0.005 ≤ d2 / F ≤ 0.23, reducing the center thickness of the second lens, can better facilitate the transition of light rays diverging from the first lens, reduce light loss, increase the light transmission of the optical lens, and improve resolution quality. The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0106] In an exemplary embodiment, the air gap d34 between the third and fourth lenses satisfies the following condition with respect to the focal length F of the entire optical lens: 0 ≤ d34 / F ≤ 0.7. Preferably, 0.006 ≤ d34 / F ≤ 0.497. The air gap d34 between the third and fourth lenses is the center distance on the optical axis between the second side of the third lens and the first side of the fourth lens. By controlling this relationship, the air gap between the third and fourth lenses can be effectively adjusted and compensated for the field curvature of the entire optical lens, thereby improving resolution. Furthermore, 0.12 ≤ d34 / F ≤ 0.6, appropriately increasing the distance between the third and fourth lenses, helps alleviate the converging pressure of the rear lens, achieving both high resolution and miniaturization. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization in the optical lens.

[0107] In an exemplary embodiment, the air gap d34 between the third and fourth lenses, the air gap d56 between the fifth and sixth lenses, and the overall focal length F of the optical lens satisfy the following condition: 0.1 ≤ MAX(d34, d56) / F ≤ 0.6. Preferably, 0.141 ≤ MAX(d34, d56) / F ≤ 0.497. The air gap d56 between the fifth and sixth lenses is the center distance on the optical axis between the second side of the fifth lens and the first side of the sixth lens. By controlling this relationship and reasonably controlling the range of d34 or d56, the field curvature of the entire optical lens can be effectively adjusted and compensated, thereby improving resolution. Furthermore, 0.25 ≤ MAX(d34, d56) / F ≤ 0.6, appropriately increasing d34 or d56, can change the light reflection between the lenses, which is beneficial for the ghost image focal point to be further away from the image plane, thus reducing ghost images. The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0108] In an exemplary embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.2 ≤ |F4 / F| ≤ 3. Preferably, 0.447 ≤ |F4 / F| ≤ 2.285. By controlling this relationship, a smaller F4 value is maintained, resulting in stronger light refraction capability, which is beneficial for correcting spherical aberration and improving resolution. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0109] In an exemplary embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: 0.15 ≤ |F5 / F| ≤ 1.3. Preferably, 0.330 ≤ |F5 / F| ≤ 0.931. By controlling this relationship, a smaller F5 value can effectively regulate the light from the rear optical lens, change the light path, and improve resolution. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0110] In an exemplary embodiment, the focal length F6 of the sixth lens and the total focal length F of the optical lens satisfy the following condition: 0.1 ≤ |F6 / F| ≤ 3. Preferably, 0.261 ≤ |F6 / F| ≤ 2.400. By controlling this relationship, the F6 range can be reasonably set to ensure that light enters the last lens smoothly, correcting coma and improving resolution. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0111] In an exemplary embodiment, the focal length F7 of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 0.5 ≤ |F7 / F| ≤ 100. Preferably, 0.716 ≤ |F7 / F| ≤ 95.361. By controlling this relationship, the F7 range can be reasonably managed, which helps to balance the aberrations of the overcorrected front lens and improve resolution; at the same time, it controls the convergence of edge rays, making the image-side aperture and image height of the seventh lens close, achieving a small CRA (Cost Reduction Aspect Ratio). The preferred range achieves better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0112] In an exemplary embodiment, the focal lengths F1 of the first lens, F2 of the second lens, and F3 of the third lens, together with the total focal length F of the optical lens group, satisfy the following condition: 0.005 ≤ F*(1 / F1 + 1 / F2 + 1 / F3) ≤ 1. Preferably, 0.009 ≤ F*(1 / F1 + 1 / F2 + 1 / F3) ≤ 0.865. By controlling this relationship, the optical power distribution of the front lens group (first lens / second lens / third lens) is controlled, which facilitates the smooth passage of light through the aperture stop after entering the optical lens, balances coma, and improves performance; it also facilitates the reception of light by the rear lens group, reducing the sensitivity of lenses near the aperture stop. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0113] In an exemplary embodiment, the focal length F1 of the first lens, the focal length F2 of the second lens, and the total focal length F of the optical lens satisfy the following condition: -1.3 ≤ (1 / F1 + 1 / F2) * F ≤ -0.05. Preferably, -1.072 ≤ (1 / F1 + 1 / F2) * F ≤ -0.078. By controlling this relationship, the focal length distribution of the first lens / second lens is controlled to diverge edge field of view rays, providing more light to enter subsequent lenses, which is beneficial to improving relative illumination. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0114] In an exemplary embodiment, the center thickness d1 of the first lens and the center thickness d2 of the second lens satisfy: 0.05 ≤ d1 / d2 ≤ 2.5. Preferably, 0.221 ≤ d1 / d2 ≤ 1.871. By controlling this relationship, and by controlling the ratio of the center thicknesses of the first and second lenses, the divergence of edge rays can be controlled, facilitating the adjustment of spherical aberration balance and improving resolution. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in optical lenses.

[0115] 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 satisfy: 0 ≤ |(HF*θ) / (F*θ)| ≤ 0.05. Preferably, 0 ≤ |(HF*θ) / (F*θ)| ≤ 0.037. By controlling this relationship, lens distortion can be effectively reduced, and the compression of the image at the edge of the field of view can be decreased. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0116] 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 satisfy the following condition: 1.5 ≤ F / H ≤ 1.8. Preferably, 1.622 ≤ F / H ≤ 1.729. By controlling this relationship, a reasonable balance between aberrations in the center and edge fields of view is achieved, which is beneficial for improving resolution. A preferred range yields better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0117] 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 satisfy the following condition: 0.06 ≤ D11 / H / F × 1mm ≤ 0.12. Preferably, 0.085 ≤ D11 / H / F × 1mm ≤ 0.098. By controlling this relationship, a small aperture at the front end can be achieved while maintaining high resolution. A preferred range results in better performance and is more conducive to achieving both high resolution and miniaturization of the optical lens.

[0118] 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 satisfy the following condition: 50° ≤ (FOV × F) / H ≤ 65°. Preferably, 55.823° ≤ (FOV × F) / H ≤ 59.511°. By controlling this relationship, it is beneficial to achieve both telephoto and wide-angle resolution. A preferred range yields better results and is more conducive to achieving high resolution while miniaturizing the optical lens.

[0119] 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 satisfy: 5 ≤ TTL / H / θ ≤ 8. Preferably, 6.035 ≤ TTL / H / θ ≤ 7.128. By controlling this relationship, the length of the lens can be effectively limited while maintaining high resolution, which is beneficial for lens miniaturization. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization of the optical lens.

[0120] In an exemplary embodiment, the total optical length (TTL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: 1.5 ≤ TTL / F ≤ 3. Preferably, 2.178 ≤ TTL / F ≤ 2.494. By controlling this relationship, lens miniaturization can be achieved while maintaining high resolution. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization in optical lenses.

[0121] 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 satisfies the following relationship with the total optical length TTL of the optical lens: 0.28 ≤ D11 / TTL ≤ 0.42. Preferably, 0.314 ≤ D11 / TTL ≤ 0.383. By controlling this relationship, the relationship between the maximum aperture of the first side of the first lens and TTL is balanced, thereby achieving miniaturization of the entire optical lens. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization in the optical lens.

[0122] 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 Dmax((L2~L7) of the second to seventh lenses corresponding to the maximum field of view of the optical lens satisfy: 0.8≤D11 / Dmax((L2~L7)≤1.1. Preferably, 0.899≤D11 / Dmax(L2~L7)≤0.987. By controlling this relationship, the maximum aperture corresponding to the maximum field of view of the first side of the first lens and the maximum aperture of the second to seventh lenses corresponding to the maximum field of view are kept close to each other, so that the entire optical lens can meet the small aperture requirement, and the light height is basically close, avoiding stray light interference with resolution and improving the imaging quality. The preferred range achieves better results and is more conducive to the optical lens to achieve high resolution while miniaturization.

[0123] 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 satisfy the following: -3 ≤ R11 / D11 ≤ -0.5. Preferably, -2.122 ≤ R11 / D11 ≤ -0.939. By controlling this relationship, the ratio of R11 to D11 can be reasonably set to achieve high resolution while maintaining a small aperture. A preferred range yields better results and is more conducive to achieving both high resolution and miniaturization of the optical lens.

[0124] 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 satisfy the following condition: -1 ≤ R11 / TTL ≤ -0.1. Preferably, -0.749 ≤ R11 / TTL ≤ -0.309. By controlling this relationship, and rationally setting the relationship between R11 and TTL, it is beneficial to adjust the focus of ghost images with other lenses and reduce ghost image energy. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0125] In an exemplary embodiment, the center thickness d1 of the first lens and the air gap d12 between the first and second lenses satisfy the following condition: 0.7 ≤ d1 / d12 ≤ 10. Preferably, 0.923 ≤ d1 / d12 ≤ 8.001. By controlling this relationship, the ratio of d1 to d12 is managed, ensuring that the diverging light rays from the first lens smoothly enter subsequent lenses, thus reducing sensitivity. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in optical lenses.

[0126] In an exemplary embodiment, the radius of curvature R71 of the first side surface of the seventh lens and the radius of curvature R72 of the second side surface of the seventh lens satisfy: 0.05 ≤ |R71 / R72| ≤ 2. Preferably, 0.100 ≤ |R71 / R72| ≤ 1.347. By controlling this relationship, R71 and R72 are reasonably set, effectively transferring light to the imaging plane and improving image resolution. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in optical lenses.

[0127] 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 satisfies the following condition: 0.1 ≤ |SAG71 / (D71 / 2)| ≤ 0.4. Preferably, 0.129 ≤ |SAG71 / (D71 / 2)| ≤ 0.296. By controlling this relationship, the sag and aperture of the first side of the seventh lens can be reasonably controlled, and the angle between the upper and lower rays at the edge of the field of view can be controlled, which is beneficial to improving relative illumination. A preferred range achieves better results and is more conducive to achieving high resolution while maintaining miniaturization in the optical lens.

[0128] In an exemplary embodiment, the radius of curvature R31 of the first side surface of the third lens and the focal length F3 of the third lens satisfy the following condition: 0.6 ≤ R31 / F3 ≤ 1.3. Preferably, 0.741 ≤ R31 / F3 ≤ 1.163. The third lens has positive optical power, and the first side surface is convex, which can effectively converge light. By controlling this relationship, the relationship between R31 and F3 can be reasonably managed, allowing light to smoothly enter the rear optical lens, reducing light loss, lowering the sensitivity of the optical lens, improving image quality, and achieving miniaturization. The preferred range achieves better results and is more conducive to achieving high resolution and miniaturization of the optical lens.

[0129] In an exemplary embodiment, Figure 1A schematic diagram showing the sagitta Sag(D / 2) / n at the n-th part of the optical axis of the lens in the edge direction and the sagitta Sag(D / 2) / (n + 1) at the (n + 1)-th part of the optical axis of the lens in the edge direction. When the first surface type is convex or the second surface is concave, the sagitta is positive, and the sagitta Sag(D / 2) / n at the n-th part of the optical axis of the lens in the edge direction and the sagitta Sag(D / 2) / (n + 1) at the (n + 1)-th part of the optical axis of the lens in the edge direction satisfy: Sag(D / 2) / n > Sag(D / 2) / (n + 1); when the first surface type is concave or the second surface type is convex, the sagitta is negative, and the sagitta Sag(D / 2) / n at the n-th part of the optical axis of the lens in the edge direction and the sagitta Sag(D / 2) / (n + 1) at the (n + 1)-th part of the optical axis of the lens in the edge direction satisfy: Sag(D / 2) / n < Sag(D / 2) / (n + 1). In this optical lens architecture, the second lens and the seventh lens are relatively sensitive. By controlling the surface types of the second lens and the seventh lens, their sagitta changes monotonically as the aperture on both sides of the lens increases, enabling the surface type of the lens to change slightly and the change in focal length to be stable when the lens is under high and low temperature changes, thereby achieving stable imaging under high and low temperature changes. Preferably, the surface types of the first lens to the seventh lens all satisfy this feature, and the temperature stability is better. In the preferred range, the implementation effect is better, which is more conducive to the optical lens achieving high resolution while兼顾miniaturization.

[0130] In an exemplary embodiment, the focal length value F4 of the fourth lens, the focal length value F5 of the fifth lens, the focal length value F6 of the sixth lens, and the focal length value F7 of the seventh lens and the overall focal length value F of the optical lens satisfy: 0.01 ≤ 丨(1 / F4 + 1 / F5 + 1 / F6 + 1 / F7) / (1 / F)丨 ≤ 1.5. Preferably, 0.03 ≤ 丨(1 / F4 + 1 / F5 + 1 / F6 + 1 / F7) / (1 / F)丨 ≤ 0.895. Reasonably controlling the combination of the optical powers of the fourth lens to the seventh lens is beneficial for the light to smoothly transition at the rear end of the optical lens, enter the imaging surface smoothly, reduce light loss, effectively correct aberrations, and achieve high resolution. In the preferred range, the implementation effect is better, which is more conducive to the optical lens achieving high resolution while兼顾miniaturization.

[0131] The optical lens according to the above embodiment of the present application can use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical parameters of each lens, the advantages of small aperture, miniaturization, high resolution, low sensitivity, small distortion, small principal light angle, and high illuminance of the optical lens are achieved. The optical lens has good temperature performance, small changes in imaging effects at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiment of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0132] 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 of the first lens to the imaging plane or the image source plane; 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).

[0133] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If desired, the optical lens may also include other numbers of lenses.

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

[0135] Example 1

[0136] The following is for reference Figure 2 Describes an optical lens according to Embodiment 1 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0137] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0138] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0139] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0140] The fourth lens L4 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0141] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0142] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0143] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0144] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0145] Table 1 shows the basic parameters of the optical lens of Example 1.

[0146] Table 1

[0147] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -17.364 2.483 1.74 28.30 S2 -294.000 0.310 S3 264.000 3.569 1.90 37.05 S4 -28.308 0.532 S5 18.407 1.171 2.00 28.32 S6 66.697 2.644 STO infinity 1.235 S8 -25.524 0.740 1.70 30.05 S9 9.021 6.500 1.50 81.61 S10 -27.105 1.462 S11 13.004 5.273 1.73 54.68 S12 -41.631 6.327 S13 -9.267 0.662 1.76 26.61 S14 -93.098 2.162 S15 infinity 0.500 1.52 64.20 S16 infinity 0.124 IMA infinity /

[0148] Taking Example 1 as an example, from Figure 3 As can be seen, the MTF peak value of the optical lens in Example 1 at a spatial frequency of 119 lp / mm (119 line pairs / mm) reaches 0.69. From Figure 4 As can be seen, the optical lens of Embodiment 1 exhibits less distortion. Therefore, the optical lens provided in Embodiment 1 has better imaging quality. The optical lenses of other embodiments of this application all have a peak MTF value exceeding 0.6 at a spatial frequency of 119 lp / mm (119 line pairs / mm), which meets the high resolution capability of 8M (eight million) pixels and has low distortion, so further details are omitted.

[0149] Example 2

[0150] The following is for reference Figure 5 Describes an optical lens according to Embodiment 2 of this application.

[0151] like 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0152] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0153] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0154] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0155] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0156] The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is concave.

[0157] The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0158] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0159] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0160] Table 2 shows the basic parameters of the optical lens in Example 2.

[0161] Table 2

[0162]

[0163]

[0164] Example 3

[0165] The following is for reference Figure 6 Describes an optical lens according to Embodiment 3 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0166] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0167] The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0168] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0169] The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being concave.

[0170] The fifth lens L5 has negative optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0171] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0172] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0173] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0174] Table 3 shows the basic parameters of the optical lens of Example 3.

[0175] Table 3

[0176]

[0177]

[0178] Example 4

[0179] The following is for reference Figure 7 Describes an optical lens according to Embodiment 4 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0180] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0181] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0182] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0183] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0184] The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is concave.

[0185] The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0186] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0187] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0188] Table 4 shows the basic parameters of the optical lens of Example 4.

[0189] Table 4

[0190] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -25.463 1.205 1.81 25.37 S2 19.507 1.063 S3 192.613 3.061 1.91 35.25 S4 -21.725 0.100 S5 13.272 6.000 2.00 29.13 S6 -85.679 2.167 STO infinity -0.030 S8 84.134 2.286 1.50 81.56 S9 -9.519 0.600 1.87 20.02 S10 11.714 1.839 S11 -40.977 2.701 2.00 28.32 S12 -12.244 4.337 S13 15.302 6.000 1.88 40.81 S14 18.098 2.046 S15 infinity 0.500 1.52 64.20 S16 infinity 0.125 IMA infinity /

[0191] Example 5

[0192] The following is for reference Figure 8 Describes an optical lens according to Embodiment 5 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0193] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0194] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0195] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0196] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0197] The fifth lens L5 has negative optical power, and its first side surface S10 is concave, and its second side surface S11 is concave.

[0198] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0199] The seventh lens L7 has negative optical power, with its first side surface S13 being concave and its second side surface S14 being convex.

[0200] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0201] Table 5 shows the basic parameters of the optical lens of Example 5.

[0202] Table 4

[0203] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -18.454 0.650 1.72 29.50 S2 20.897 0.704 S3 42.032 2.948 2.00 28.32 S4 -46.806 0.100 S5 14.737 3.751 1.68 55.56 S6 -107.824 2.375 STO infinity 4.243 S8 18.324 3.162 1.73 54.67 S9 -30.275 0.744 S10 -14.601 4.420 1.78 26.08 S11 6.298 4.580 1.95 32.32 S12 -33.380 2.936 S13 -7.928 0.887 1.81 25.37 S14 -21.943 1.375 S15 infinity 0.500 1.52 64.20 S16 infinity 0.125 IMA infinity /

[0204] Example 6

[0205] The following is for reference Figure 9 Describes an optical lens according to Embodiment 6 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0206] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0207] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0208] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0209] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0210] The fifth lens L5 has negative optical power, and its first side surface S10 is concave, and its second side surface S11 is concave.

[0211] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0212] The seventh lens L7 has negative optical power, and its first side surface S13 is convex and its second side surface S14 is concave.

[0213] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0214] Table 6 shows the basic parameters of the optical lens of Example 6.

[0215] Table 6

[0216] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -12.062 0.960 1.69 31.18 S2 -39.589 0.317 S3 20.871 3.205 1.81 22.76 S4 11.809 0.385 S5 12.759 3.198 1.91 35.25 S6 -41.767 3.015 STO infinity 4.570 S8 21.727 2.001 1.88 40.81 S9 -44.191 0.969 S10 -13.346 2.374 1.81 25.38 S11 13.379 2.699 1.88 40.81 S12 -37.360 1.229 S13 13.914 4.855 2.00 28.32 S14 10.331 4.219 S15 infinity 0.500 1.52 64.20 S16 infinity 0.130 IMA infinity /

[0217] Example 7

[0218] The following is for reference Figure 10 Describes an optical lens according to Embodiment 7 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0219] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0220] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0221] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0222] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0223] The fifth lens L5 has negative optical power, and its first side surface S10 is concave, and its second side surface S11 is concave.

[0224] The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex.

[0225] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0226] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0227] Table 7 shows the basic parameters of the optical lens of Example 7.

[0228] Table 7

[0229]

[0230]

[0231] Example 8

[0232] The following is for reference Figure 11 Describes an optical lens according to Embodiment 8 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0233] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0234] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0235] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0236] The fourth lens L4 has positive optical power, with its first side surface S8 being concave and its second side surface S9 being convex.

[0237] The fifth lens L5 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0238] The sixth lens L6 has negative optical power, and its first side surface S11 is concave and its second side surface S12 is concave.

[0239] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0240] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0241] Table 8 shows the basic parameters of the optical lens of Example 8.

[0242] Table 8

[0243] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -11.961 2.499 1.81 25.38 S2 -31.765 0.312 S3 22.658 3.592 1.87 20.02 S4 12.075 0.521 S5 13.710 2.517 2.00 29.13 S6 236.000 3.678 STO infinity 0.227 S8 -576.000 1.612 2.00 28.32 S9 -25.574 0.292 S10 12.032 6.500 1.73 54.67 S11 -11.266 2.410 2.00 25.46 S12 7.722 0.613 S13 8.826 2.732 2.00 28.32 S14 22.449 6.563 S15 infinity 0.500 1.52 64.20 S16 infinity 0.130 IMA infinity /

[0244] Example 9

[0245] The following is for reference Figure 12 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 12 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. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0246] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0247] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0248] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0249] The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0250] The fifth lens L5 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0251] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0252] The seventh lens L7 has negative optical power, and its first side surface S13 is concave, and its second side surface S14 is concave.

[0253] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0254] Table 9 shows the basic parameters of the optical lens of Example 9.

[0255] Table 9

[0256] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -10.519 1.826 1.74 44.85 S2 -31.667 0.273 S3 21.154 3.144 1.76 27.58 S4 10.919 0.425 S5 12.004 4.335 1.73 34.93 S6 -42.660 0.733 STO infinity 2.684 S8 71.783 1.912 1.56 64.21 S9 -22.805 0.100 S10 12.872 4.274 3.46 76.16 S11 -9.627 5.282 1.76 27.58 S12 -233.387 1.002 S13 -16.400 4.451 1.71 29.50 S14 24.000 3.013 S15 infinity 0.500 1.52 64.20 S16 infinity 0.128 IMA infinity /

[0257] Example 10

[0258] The following is for reference Figure 13 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 13 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. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0259] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0260] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0261] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0262] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0263] The fifth lens L5 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0264] The sixth lens L6 has negative optical power, and its first side surface S11 is concave and its second side surface S12 is concave.

[0265] The seventh lens L7 has positive optical power, with its first side surface S13 being convex and its second side surface S14 being concave.

[0266] An image plane IMA is disposed on the second side of the optical lens. 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. 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.

[0267] Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0268] Table 10

[0269] Face number Radius of curvature (mm) Thickness / Distance (mm) Refractive index Abbe number S1 -12.588 2.509 1.81 25.38 S2 -35.753 1.236 S3 22.593 3.607 1.87 20.02 S4 12.432 0.541 S5 13.889 2.684 2.00 29.13 S6 247.000 3.921 S7 159.512 1.601 2.00 28.32 S8 -33.120 0.100 STO infinity 0.100 S10 12.915 6.500 1.73 54.67 S11 -10.862 3.598 2.00 25.46 S12 7.778 0.571 S13 8.738 1.844 2.00 28.32 S14 23.909 6.640 S15 infinity 0.500 1.52 64.20 S16 infinity 0.130 IMA infinity

[0270] Table 11-1 lists the basic parameters of the optical lenses in Examples 1-10, such as F, ENPD, TTL, FOV, θ, H, F1, F2, F3, F4, F5, F6, F7, d1, d12, d2, d23, d34, d56, L (STO~IMG), D11, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, D71, D72, SAG11, and SAG71.

[0271] Table 11-1

[0272]

[0273]

[0274] In summary, the relationships in each embodiment of Examples 1-10 satisfy the relationships shown in Table 12-1.

[0275] Table 12-1

[0276]

[0277] This application also provides an electronic device including an optical lens as described in the exemplary embodiments above and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element is disposed on a second side of the optical lens, for example, on an imaging surface, and may be, for example, a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0278] This application also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above, with the light source located on a second side of the optical lens. Light emitted from the light source is projected onto a first side of the optical lens after passing through it, forming an image or illuminating an area on the first side.

[0279] This application also provides an electronic device, including a first device and 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.

[0280] 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; The third lens with positive optical power has a convex first side surface; A fourth lens with optical power; A fifth lens with optical power; A sixth lens with optical power; A seventh lens with optical power; Among them, the fourth lens, the fifth lens and the sixth lens shall have at least one positive power lens and one negative power lens; The optical lens has seven lenses with optical power. The optical lens includes an aperture stop, which is located between the third lens and the imaging plane; The optical lens satisfies the following conditions: -1.8≤F1 / F≤-0.4, 0.45≤L(STO~IMG) / TTL≤0.7, 0.01≤|(1 / F4+1 / F5+1 / F6+1 / F7) / (1 / F)|≤1.5; Wherein, F1 is the focal length of the first lens, F is the total focal length of the optical lens group, L (STO~IMG) is the center distance on the optical axis from the aperture stop of the optical lens to the imaging plane, 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 concave; or, The second side surface of the first lens is a convex surface; The second lens has positive optical power, with its first side surface being concave and its second side surface being convex; or, The second lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or, The second lens has negative optical power, and its first side surface is convex and its second side surface is concave. The second side surface of the third lens is concave; or... The second side surface of the third lens is a convex surface; The fourth lens has positive optical power, with its first side surface being convex and its second side surface being concave; or... The fourth lens has positive optical power, with its first side surface being concave and its second side surface being convex; or... The fourth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or... The fourth lens has negative optical power, and its first side surface is concave, and its second side surface is concave. The fifth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or... The fifth lens has negative optical power, its first side surface is convex, and its second side surface is concave; or... The fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex. The sixth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or... The sixth lens has negative optical power, its first side surface is concave, and its second side surface is convex; or... The sixth lens has positive optical power, with its first side surface being concave and its second side surface being convex; or... The sixth lens has positive optical power, and its first side surface is convex, and its second side surface is convex. The seventh lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or... The seventh lens has negative optical power, its first side surface is concave, and its second side surface is convex; or... The seventh lens has negative optical power, its first side surface is convex, and its second side surface is concave; or... The seventh lens has positive optical power, and its first side surface is convex and its second side surface is concave. 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; The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all glass spherical lenses; The aperture stop is positioned between the third lens and the fourth lens; or... The aperture is positioned between the fourth lens and the fifth lens.

3. 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 condition: 0.02≤d1 / F≤0.

17.

4. The optical lens according to claim 1 or 2, characterized in that, The air gap d23 between the second lens and the third lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001≤d23 / TTL≤0.

016.

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

35.

6. The optical lens according to any one of claims 1 or 2, characterized in that, 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 satisfy the following condition: 1.5≤F / H≤1.

8.

7. The optical lens according to any one of claims 1-5, characterized in that, The air gap d12 between the first lens and the second lens and the total focal length F of the optical lens satisfy the following condition: 0.015≤d12 / F≤0.

085.

8. The optical lens according to any one of claims 1-5, 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: -2≤R11 / F≤-0.

65.

9. The optical lens according to any one of claims 1-5, characterized in that, The radius of curvature R72 of the second side surface of the seventh lens satisfies the following condition with respect to the focal length F of the optical lens: 0.2 ≤ |R72 / F| ≤ 6.

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