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, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface; the second lens has focal power, and the first side surface of the second lens is a concave surface; the third lens has focal power, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side surface of the fourth lens is a convex surface; the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface; the sixth lens has focal power; a seventh lens with focal power; the eighth lens has focal power; the optical lens satisfies the following conditions: 0.086 < = T45 / F4 < = 0.308 and-5.235 < = R22 / F2 < =-0.233.

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] As vehicle driver assistance systems continue to upgrade, the requirements for image quality in automotive cameras are also constantly increasing. This has led to a continuous increase in the number of lenses included in automotive cameras, and consequently, a continuous increase in the size of automotive cameras. On the other hand, automotive cameras are usually installed in the fenders and under the rearview mirrors, where the space is relatively small. As the size of automotive cameras continues to increase, these installation locations are gradually becoming insufficient to meet the installation requirements.

[0003] In conclusion, existing automotive lenses struggle to balance image quality and miniaturization. Summary of the Invention

[0004] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along the optical axis: a first lens having negative optical power, the first side of the first lens being convex and the second side of the first lens being concave; a second lens having optical power, the first side of the second lens being concave; a third lens having optical power, the second side of the third lens being convex; a fourth lens having positive optical power, the first side of the fourth lens being convex; a fifth lens having positive optical power, the first side of the fifth lens being convex and the second side of the fifth lens being convex; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having optical power; the number of lenses having optical power in the optical lens is eight; the optical lens satisfies: 0.086≤T45 / F4≤0.308; -5.235≤R22 / F2≤-0.233.

[0005] According to an exemplary embodiment of this application, the second lens has a negative optical power and a concave second side surface; or, the second lens has a positive optical power and a convex second side surface; the third lens has a positive optical power and a convex first side surface; or, the third lens has a negative optical power and a concave first side surface; the fourth lens has a concave second side surface; or, the fourth lens has a convex second side surface; the sixth lens has a negative optical power, a concave first side surface, and a concave second side surface; or, the sixth lens has a negative optical power, a convex first side surface, and a concave second side surface; or, the sixth lens has a positive optical power, a convex first side surface, and a convex second side surface; the seventh lens has a negative optical power. The optical power of the seventh lens is positive, and both its first and second sides are convex; or, the optical power of the seventh lens is negative, and both its first and second sides are concave. The optical power of the eighth lens is negative, and both its first and second sides are convex; or, both its first and second sides are concave; or, both its first and second sides are concave; or, both its first and second sides are concave; or, both its first and second sides are convex; or, both its first and second sides are convex; or, both its first and second sides are concave.

[0006] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.36≤R11 / TTL≤1.306; 3.185≤R11 / F≤11.563; 0.436≤R21 / R32≤1.187.

[0007] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 7.089≤TTL / F≤10.191; 0.021≤TTL / H / FOV*1°≤0.035; 1.394≤F / ENPD≤1.898.

[0008] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.031≤|(HF*θ) / (F*θ)|≤0.1; 0.009≤D / H / FOV*1°≤0.014; 1.383≤(FOV*H) / (F*180°)≤2.218.

[0009] According to an exemplary embodiment of this application, the optical lens satisfies: -2.361≤F1 / F≤-1.406.

[0010] According to an exemplary embodiment of this application, the optical lens satisfies: 0.994≤|F2 / F|≤18.42.

[0011] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 1.459≤|F3 / F|≤7.602; 2.644≤F4 / F≤12.917.

[0012] According to an exemplary embodiment of this application, the optical lens satisfies: 1.74≤F5 / F≤3.61.

[0013] According to an exemplary embodiment of this application, the optical lens satisfies: 0.852≤|F6 / F|≤2.527.

[0014] According to an exemplary embodiment of this application, the optical lens satisfies: 1.103≤|F7 / F|≤2.539.

[0015] According to an exemplary embodiment of this application, the optical lens satisfies: 3.821≤|F8 / F|≤198.789.

[0016] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 37.25≤|Vd6-Vd7|≤54.004; 0≤|BFL-BFL'|≤0.009; 0.845≤F / F'≤1.148; 46.307≤Vd5 / Nd5≤76.125.

[0017] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.972≤F4 / F5≤6.234; 0.808≤|F5 / F6|≤2.405; -13.067≤F67 / F≤54.84; 0.626≤T45 / F≤1.456; 0.02≤T78 / F≤0.245; 0.606≤BFL / F≤1.638; -0.194≤φ23 / φ≤0.005.

[0018] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.07≤BFL / TTL≤0.196; 0.06≤d7 / TTL≤0.197; 0.014≤T78 / BFL≤0.276; 0.128≤T45 / F5+T78 / F7≤0.714.

[0019] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 8.339≤TTL / F≤8.862; 0.025≤TTL / H / FOV*1°≤0.03; 0.036≤|(HF*θ) / (F*θ)|≤0.088; 0.01≤D / H / FOV*1°≤0.012; 1.627≤(FOV*H) / (F*180°)≤1.93; -2.053≤F1 / F≤-1.654; 1.169≤|F2 / F|≤16.018;1.716≤|F3 / F|≤6.61;3.111≤F4 / F≤11.232;2.046≤F5 / F≤3.139;1.002≤|F6 / F|≤2.198;1.297≤|F7 / F|≤2.209;4.494≤|F8 / F|≤172.861;43.822≤|Vd6-Vd7|≤46.96;1.639≤F / ENPD≤1.65;-0.17≤φ23 / φ≤ 0.004; 0.081≤BFL / TTL≤0.17; 0≤|BFL-BFL'|≤0.007; 0.423≤R11 / TTL≤1.136; 3.747≤R11 / F≤10.055; -11.3 64≤F67 / F≤47.688; 0.513≤R21 / R32≤1.032; 0.07≤d7 / TTL≤0.172; 0.993≤F / F'≤1; 54.479≤Vd5 / Nd5≤66.196 ;1.142≤F4 / F5≤5.421; 0.95≤|F5 / F6|≤2.091; 0.023≤T78 / F≤0.214; 0.101≤T45 / F4≤0.268; 0.735≤T45 / F≤1 .266; 0.712≤BFL / F≤1.424; 0.017≤T78 / BFL≤0.24; 0.151≤T45 / F5+T78 / F7≤0.621; -4.553≤R22 / F2≤-0.254.

[0020] Where TTL is the total optical length of the optical lens, F is the focal length of the optical lens in the visible light band, F' is the focal length of the optical lens in the infrared band, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, φ23 is the combined optical power of the second and third lenses, φ is the optical power of the optical lens, BFL is the optical back focal length of the optical lens in the visible light band, BFL' is the optical back focal length of the optical lens in the infrared band; 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, and 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, F8 is the focal length of the eighth lens, and F67 is the combined focal length of the sixth and seventh lenses; Vd5 is the Abbe number of the fifth lens, Nd5 is the refractive index of the fifth lens, Vd6 is the Abbe number of the sixth lens, and Vd7 is the Abbe number of the seventh lens; R11 is the central radius of curvature of the first side surface of the first lens, R21 is the central radius of curvature of the first side surface of the second lens, R22 is the central radius of curvature of the second side surface of the second lens, R32 is the central radius of curvature of the second side surface of the third lens, d7 is the distance between the second side surface of the fourth lens and the aperture stop on the optical axis, T45 is the distance between the second side surface of the fourth lens and the first side surface of the fifth lens on the optical axis, and T78 is the distance between the second side surface of the seventh lens and the first side surface of the eighth lens on the optical axis.

[0021] A second aspect of this application provides an electronic device, including the aforementioned optical lens; 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; wherein 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 an illuminated area on the first side of the optical lens.

[0022] Light rays pass sequentially through the first, second, third, fourth, fifth, sixth, seventh, and eighth lenses, eventually forming an image on the image plane. During this process, the negative optical power first lens diverges the light rays, ensuring they maintain an upward trajectory. This allows the light rays exiting from the second side of the first lens to provide a larger light-receiving surface for subsequent lenses while maintaining a constant field of view. Designing the first side of the first lens as convex facilitates control over the aperture of subsequent lenses, enabling miniaturization. It also results in a smaller angle of incidence at the first side, allowing the light to reach the rear of the system smoothly after passing through the first lens, thus increasing the field of view. Designing the second side of the first lens as concave allows large-angle light rays passing through the first side to diverge rapidly, facilitating aberration correction by the rear lenses and achieving high resolution. The first side of the second lens is concave. This serves two purposes: firstly, it diverges light rays, causing a significant bend in the light as it enters the second lens, altering the trajectory of large-angle light and making the outgoing light smoother. This helps achieve a large field of view while improving aberrations. Secondly, it works in conjunction with the concave second side of the first lens to change the trajectory of peripheral light rays, reducing the front aperture of the lens and thus facilitating miniaturization and cost reduction. Furthermore, by satisfying -5.235 ≤ R²² / F² ≤ -0.233, light can be smoothly transmitted through the second lens, reducing system sensitivity. Setting the second side of the third lens to be convex reduces the incident height of large-angle light rays, thereby reducing the rear aperture and overall optical length of the lens. The fourth lens, with positive power, is convex to the first side, which facilitates light convergence, allowing light to smoothly transition to the rear lenses and improving resolution. Setting the surface of the fifth lens, also with positive power, to be biconvex helps reduce aberrations, improve image quality, and also ensures smooth light convergence to the image plane. Furthermore, by satisfying 0.086≤T45 / F4≤0.308, light rays can be effectively compressed and converged inward at the fourth lens, thus reaching the image plane as quickly as possible. This helps to reduce the aperture of the fourth lens and subsequent lenses, thereby achieving lens miniaturization. Moreover, controlling T45 / F4 also facilitates the fifth lens in converging forward light rays, improving image quality. Attached Figure Description

[0023] Figures 1-22 The structural schematic diagrams of the optical lenses of Embodiments 1 to 22 of this application are shown in sequence; Figure 23a and Figure 24aThe curves shown are, in order, the modulation transfer function (MTF) curves of the optical lenses in the visible light band in Embodiments 1 and 2 of this application. They represent the lens imaging modulation at different spatial frequencies under each field of view. The horizontal axis represents the spatial frequency (unit: lp / mm), and the vertical axis represents the OTF coefficient. Figure 23b and Figure 24b The following are the modulation transfer function curves of the optical lenses in the infrared band in Embodiments 1 and 2 of this application, respectively. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The features, principles and other aspects of this application are described in detail below.

[0032] An optical lens according to an exemplary embodiment of this application may include, for example, eight lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0033] In an exemplary embodiment, the optical lens provided in this application can be used as a light receiving lens or a light emitting lens, wherein: the light receiving lens is generally used to collect light from the object side, and the collected light is used to form detection information, including but not limited to imaging, laser point clouds, etc.; the light emitting lens is generally used to transmit light from the light emitting unit to the object side space, and the light transmitted to the object side can be divided into projection light for forming a projection image or detection light for detecting target information, etc., according to the function of the light.

[0034] 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 may refer to the object side, and "second side" may 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 may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0035] In some possible implementations, the optical lens provided in this application can also simultaneously perform both light receiving and light transmitting functions. For example, the optical lens provided in this application is used in a lidar system with shared light and light paths, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application is used in a system integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0036] In an exemplary embodiment, the first lens has negative optical power, which can diverge light rays and maintain their upward trend, providing a larger receiving surface for subsequent lenses while keeping the field of view constant; the use of a high refractive index material can reduce the front port diameter of the system. The first side of the first lens is convex, which can control the diameter of the subsequent lenses to achieve miniaturization, and can also reduce the incident angle of light rays and ensure smooth light transmission to increase the field of view; the second side is concave, which can quickly diverge large-angle light rays, making it easier for subsequent lenses to correct aberrations and achieve high resolution.

[0037] In an exemplary embodiment, the second lens has either negative or positive optical power. When it has negative optical power, the double concave shape, combined with the concave surface of the second side of the first lens, optimizes the uniformity of light illumination, compresses the optical path to make the system space more compact, and corrects field curvature, astigmatism, etc. When it has positive optical power, a concave-convex shape is used. The concave surface diverges light, making the outgoing light smoother and optimizing aberrations; the convex surface converges light and reduces the incident height of large-angle light, reducing the rear port diameter and total optical length of the lens. The two work together to improve the stability of the optical path.

[0038] In an exemplary embodiment, the third lens has positive or negative optical power: when it is positive optical power, the system is more compact, the total optical length is shortened, and aberrations are improved, resolution is enhanced, and thermal compensation is strengthened; when it is negative optical power, the axial length and rear port diameter of the system are further reduced, and aberrations and chromatic aberrations are corrected in conjunction with the front lens, thereby achieving good imaging effects in both infrared and visible light bands.

[0039] In an exemplary embodiment, cementing the second lens and the third lens together to form a first cemented lens helps to shorten the overall optical length, simplify the structure, and reduce assembly tolerance sensitivity and cost. Simultaneously, this cementing design reduces light loss, increases illumination, and effectively corrects field curvature, off-axis aberrations, and distortions, thereby optimizing image quality while maintaining system compactness.

[0040] In an exemplary embodiment, the fourth lens has positive optical power and the convex surface of the first side can converge the light emitted from the third lens, which is beneficial for smooth transition and improved resolution; the concave surface of the second side can increase the optical path difference between the central and edge fields of view and correct edge aberrations; the convex surface, together with the aperture stop and the fifth lens, restricts the light rays at the edge of the central field of view, corrects spherical aberration, and improves the central imaging quality and resolution.

[0041] In an exemplary embodiment, the fifth lens has positive optical power and is biconvex, which can effectively converge light. Preferably, an aspherical lens reduces aberrations and improves image quality, allowing light to reach the image plane smoothly. Using a positive lens material with a high Abbe number and low refractive index optimizes axial chromatic aberration and improves confocal performance in the infrared and visible light bands.

[0042] In an exemplary embodiment, at least two positive lenses in front of the sixth lens can easily introduce large aberrations. When the optical power is negative and the second side is concave, light rays can be diverged, aberrations can be corrected, and image quality can be improved. The concave first side can significantly bend the incident light rays, changing the trajectory of light rays at large angles. The convex first side, combined with a high refractive index, can increase the edge optical path, correct field curvature, and improve resolution. When the optical power is positive and the surface is biconvex, the light rays from the rear lens group can be converged and compressed, reducing the light beam height to achieve a small aperture.

[0043] In an exemplary embodiment, the seventh lens can have positive or negative optical power. With positive optical power, it has a biconvex shape, which can converge light to the eighth lens, reducing system sensitivity. It is cemented with the sixth lens to achromaticize, improving confocal performance for infrared and visible light. The convex surface of the first side can regulate light, while the convex surface of the second side can finely converge light to meet the incident light requirements of the eighth lens. With negative optical power, it has a biconcave shape. Cementing it with the sixth lens can shorten the overall system length, compact the structure, improve aberrations, enhance resolution, and facilitate assembly. Simultaneously, it diverges light, expands the imaging surface and effective light height, and enhances the aspherical correction capability of the eighth lens.

[0044] In an exemplary embodiment, the eighth lens may have negative or positive optical power. With negative optical power, a convex first side allows for a smooth transition of large-angle peripheral light rays, while a concave first side facilitates receiving light rays from the seventh lens and smoothing their path. A concave second side diverges light rays and smoothly transitions them to the image plane to meet the principal ray angle (CRA) requirement; a convex second side can control the divergence of the emitted light rays, improving resolution and illumination. With positive optical power, a convex first side can lower the light path, reduce field-of-view light loss, and improve illumination. A convex second side reduces the incident height of large-angle light rays, shortens the overall optical length, and reduces the rear aperture; a concave second side diverges light rays and smoothly transitions them to the image plane to meet the CRA requirement, improving resolution and illumination. The eighth lens is preferably aspherical to correct astigmatism and field curvature, improving the system's resolving power.

[0045] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the fourth and fifth lenses, to facilitate effective light convergence, thereby reducing the aperture of the rear lens of the system and lowering the system's assembly sensitivity. It should be understood that the placement of the aperture stop between the fourth and fifth lenses is merely exemplary, and this application does not impose specific limitations on it; the aperture stop may be placed in other positions as needed.

[0046] In an exemplary embodiment, at least one inflection point is present on the first side surface and the second side surface of the eighth lens. This arrangement helps to balance aberrations in the central and peripheral fields of view, thereby improving resolution.

[0047] In an exemplary embodiment, the surfaces of the fifth and eighth lenses may have one or more aspherical surfaces.

[0048] In an exemplary embodiment, the optical lens may further include a filter located between the eighth 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.

[0049] 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 photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0050] TTL is the total optical length of the optical lens; F is the focal length of the optical lens in the visible light band; F' is the focal length of the optical lens in the infrared band; H is the image height corresponding to the maximum field of view of the optical lens; FOV is the maximum field of view of the optical lens; θ is the radian value corresponding to the maximum field of view of the optical lens; D is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens; ENPD is the entrance pupil diameter of the optical lens; φ23 is the combined optical power of the second and third lenses; φ is the optical power of the optical lens; BFL is the optical back focal length of the optical lens in the visible light band; BFL' is the optical back focal length of the optical lens in the infrared band; 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; F... F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, F8 is the focal length of the eighth lens, and F67 is the combined focal length of the sixth and seventh lenses; Vd5 is the Abbe number of the fifth lens, Nd5 is the refractive index of the fifth lens, Vd6 is the Abbe number of the sixth lens, and Vd7 is the Abbe number of the seventh lens; R11 is the central radius of curvature of the first side surface of the first lens, R21 is the central radius of curvature of the first side surface of the second lens, R22 is the central radius of curvature of the second side surface of the second lens, R32 is the central radius of curvature of the second side surface of the third lens, d7 is the distance between the second side surface of the fourth lens and the aperture stop on the optical axis, T45 is the distance between the second side surface of the fourth lens and the first side surface of the fifth lens on the optical axis, and T78 is the distance between the second side surface of the seventh lens and the first side surface of the eighth lens on the optical axis.

[0051] In an exemplary embodiment, 7.089 ≤ TTL / F ≤ 10.191. Preferably, 8.339 ≤ TTL / F ≤ 8.862. This effectively limits the lens length, facilitating lens miniaturization.

[0052] In an exemplary embodiment, 0.021 ≤ TTL / H / FOV*1° ≤ 0.035. Preferably, 0.025 ≤ TTL / H / FOV*1° ≤ 0.03. This effectively limits the lens length while keeping the image height constant, facilitating lens miniaturization.

[0053] In an exemplary embodiment, 0.031 ≤ |(HF*θ) / (F*θ)| ≤ 0.1. Preferably, 0.036 ≤ |(HF*θ) / (F*θ)| ≤ 0.088. Thus, while keeping the maximum field of view and image height constant, the lens focal length can be reasonably increased, emphasizing the imaging effect in the central area of ​​the image plane and reducing distortion.

[0054] In an exemplary embodiment, 0.009 ≤ D / H / FOV*1° ≤ 0.014. Preferably, 0.01 ≤ D / H / FOV*1° ≤ 0.012. This effectively limits the lens front diameter while keeping the image height and maximum field of view constant, facilitating miniaturization.

[0055] In an exemplary embodiment, 1.383 ≤ (FOV*H) / (F*180°) ≤ 2.218. Preferably, 1.627 ≤ (FOV*H) / (F*180°) ≤ 1.93. This allows for a smaller lens focal length while maintaining the same image height and maximum field of view, helping the system receive light from a wider angle and reducing distortion.

[0056] In an exemplary embodiment, -2.361 ≤ F1 / F ≤ -1.406. Preferably, -2.053 ≤ F1 / F ≤ -1.654. ​​This allows for a reasonable allocation of the focal length of the first lens, which is beneficial for light rays with a large field of view to enter the optical system.

[0057] In an exemplary embodiment, 0.994 ≤ |F² / F| ≤ 18.42. Preferably, 1.169 ≤ |F² / F| ≤ 16.018. This is beneficial for collecting light from a large field of view, better receiving the light diverging from the first lens, and increasing the amount of light transmitted.

[0058] In an exemplary embodiment, 1.459 ≤ |F3 / F| ≤ 7.602. Preferably, 1.716 ≤ |F3 / F| ≤ 6.61. This allows the third lens to smoothly receive the forward light while simultaneously reducing the aperture of the rear lens rapidly.

[0059] In an exemplary embodiment, 2.644 ≤ F4 / F ≤ 12.917. Preferably, 3.111 ≤ F4 / F ≤ 11.232. This allows the light to be effectively compressed and converged inward at the fourth lens, reaching the image plane faster, which is beneficial for reducing the aperture of the rear lens and achieving miniaturization.

[0060] In an exemplary embodiment, 1.74 ≤ F5 / F ≤ 3.61. Preferably, 2.046 ≤ F5 / F ≤ 3.139. This is beneficial for converging the light from the front. The fifth lens, combined with its own material coefficient, enables the fifth lens to play a significant role in chromatic aberration and thermal compensation, which is conducive to achieving good imaging effects of the lens in the infrared and visible light bands.

[0061] In an exemplary embodiment, 0.852 ≤ |F6 / F| ≤ 2.527. Preferably, 1.002 ≤ |F6 / F| ≤ 2.198. This allows the sixth lens to smoothly receive the light from the front and enables the aperture of the rear lens to decrease rapidly.

[0062] In an exemplary embodiment, 1.103 ≤ |F7 / F| ≤ 2.539. Preferably, 1.297 ≤ |F7 / F| ≤ 2.209. This allows for a reasonable allocation of the focal length of the seventh lens, ensuring a smooth transition of light to the rear optical system, while also facilitating light collection, ensuring sufficient light transmission, and improving resolution.

[0063] In an exemplary embodiment, 3.821 ≤ |F8 / F| ≤ 198.789. Preferably, 4.494 ≤ |F8 / F| ≤ 172.861. This allows the eighth lens to smoothly receive the light emitted from the seventh lens, thereby ensuring smooth light emission to the image plane and reducing sensitivity.

[0064] In an exemplary embodiment, 37.25 ≤ |Vd6-Vd7| ≤ 54.004. Preferably, 43.822 ≤ |Vd6-Vd7| ≤ 46.96. This allows for a larger dispersion difference between the sixth and seventh lenses, effectively correcting axial chromatic aberration and improving the lens's confocal performance in both the infrared and visible light bands.

[0065] In an exemplary embodiment, 1.394 ≤ F / ENPD ≤ 1.898. Preferably, 1.639 ≤ F / ENPD ≤ 1.65. This is beneficial for the lens to have a reasonable aperture value, thereby improving illumination.

[0066] In an exemplary embodiment, -0.194 ≤ φ23 / φ ≤ 0.005. Preferably, -0.17 ≤ φ23 / φ ≤ 0.004. This effectively corrects astigmatism and improves lens resolution.

[0067] In an exemplary embodiment, 0.07 ≤ BFL / TTL ≤ 0.196. Preferably, 0.081 ≤ BFL / TTL ≤ 0.17. This allows the optical lens to have a suitable back focal length, thereby reserving space for the installation and focusing of optical components, avoiding interference between mechanisms, and balancing a long back focal length with system miniaturization.

[0068] In an exemplary embodiment, 0 ≤ |BFL-BFL'| ≤ 0.009. Preferably, 0 ≤ |BFL-BFL'| ≤ 0.007. This ensures that the optimal imaging plane (chip plane) of the lens differs less between the visible and infrared light bands, which helps improve the lens's confocal performance in both the infrared and visible light bands.

[0069] In an exemplary embodiment, 0.36 ≤ R11 / TTL ≤ 1.306 or 3.185 ≤ R11 / F ≤ 11.563. Preferably, 0.423 ≤ R11 / TTL ≤ 1.136 or 3.747 ≤ R11 / F ≤ 10.055. This allows the pupil image of the ghost image to be moved away from the focal plane, reducing the relative energy value of the ghost image and improving the quality of the image captured by the lens.

[0070] In an exemplary embodiment, -13.067 ≤ F67 / F ≤ 54.84. Preferably, -11.364 ≤ F67 / F ≤ 47.688. This effectively controls the light path within the second cemented lens, reduces aberrations caused by large-angle light emitted from the fifth lens, and makes the lens structure more compact, facilitating miniaturization.

[0071] In an exemplary embodiment, 0.436 ≤ R21 / R32 ≤ 1.187. Preferably, 0.513 ≤ R21 / R32 ≤ 1.032. Further, 0.819 ≤ R21 / R32 ≤ 1.032. This allows the shape of the first cemented lens to be approximately circular, which facilitates a smooth transition of light and thus improves image quality.

[0072] In the exemplary embodiment, 0.06 ≤ d7 / TTL ≤ 0.197. Preferably, 0.07 ≤ d7 / TTL ≤ 0.172. This setting helps to reduce lens reflection, achieving a ghosting-free effect. It also allows for a smaller rear port diameter, enabling smooth light transition and ensuring image quality.

[0073] In an exemplary embodiment, 0.845 ≤ F / F' ≤ 1.148. Preferably, 0.993 ≤ F / F' ≤ 1. This allows the lens to have a focal length in the infrared band that is close to its focal length in the visible band, thereby enabling the lens to achieve clear imaging in both the infrared and visible bands simultaneously.

[0074] In an exemplary embodiment, 46.307 ≤ Vd5 / Nd5 ≤ 76.125. Preferably, 54.479 ≤ Vd5 / Nd5 ≤ 66.196. The fifth lens is a positive lens. By selecting a material with a low refractive index and a high Abbe number to fabricate the fifth lens, axial chromatic aberration can be effectively corrected, and the confocal performance in the infrared and visible light bands can be improved.

[0075] In an exemplary embodiment, 0.972 ≤ F4 / F5 ≤ 6.234. Preferably, 1.142 ≤ F4 / F5 ≤ 5.421. This design allows the fourth and fifth lenses to have similar focal lengths, which helps to smooth the light transition and improve image quality.

[0076] In an exemplary embodiment, 0.808 ≤ |F5 / F6| ≤ 2.405. Preferably, 0.95 ≤ |F5 / F6| ≤ 2.091. This design contributes to a smoother light transition and improved image quality.

[0077] In an exemplary embodiment, 0.02 ≤ T78 / F ≤ 0.245. Preferably, 0.023 ≤ T78 / F ≤ 0.214. This allows light to reach the image plane faster, achieving miniaturization while maintaining a small CRA (Cryptographic Resonance Aspect Ratio) and improving image quality.

[0078] In an exemplary embodiment, 0.086 ≤ T45 / F4 ≤ 0.308. Preferably, 0.101 ≤ T45 / F4 ≤ 0.268. This is beneficial for the fifth lens to converge the light from the front, thereby improving image quality.

[0079] In an exemplary embodiment, 0.626 ≤ T45 / F ≤ 1.456. Preferably, 0.735 ≤ T45 / F ≤ 1.266. This allows light to transition smoothly to the lens behind the fifth lens, thereby reducing the sensitivity of the optical system.

[0080] In an exemplary embodiment, 0.606 ≤ BFL / F ≤ 1.638. Preferably, 0.712 ≤ BFL / F ≤ 1.424. This satisfies the requirement of a long back focal length for the lens while keeping the system focal length constant, avoids mechanical interference, and balances the requirements of a long back focal length with lens miniaturization.

[0081] In an exemplary embodiment, 0.014 ≤ T78 / BFL ≤ 0.276. Preferably, 0.017 ≤ T78 / BFL ≤ 0.24. This allows for optimization of the light incident angle and suppression of stray light through a long back focal length, while also enabling aberration correction through the coordinated use of multiple lenses. This achieves control over light and aberration correction, thereby improving image uniformity and sharpness.

[0082] In an exemplary embodiment, 0.128 ≤ T45 / F5 + T78 / F7 ≤ 0.714. Preferably, 0.151 ≤ T45 / F5 + T78 / F7 ≤ 0.621. This allows light to be transmitted smoothly through the system, reducing system sensitivity.

[0083] In an exemplary embodiment, -5.235 ≤ R²² / F² ≤ -0.233. Preferably, -4.553 ≤ R²² / F² ≤ -0.254. This allows light to be transmitted smoothly in the first cemented lens, reducing system sensitivity.

[0084] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the eight lenses mentioned above. By rationally allocating the optical parameters of each lens, the optical lens achieves small aperture, miniaturization, high resolution, low sensitivity, long back focal length, low distortion, and high illumination, and can be well matched with, for example, automotive chips. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of, for example, automotive applications.

[0085] Those skilled in the art should understand that the total optical length (TTL) of the optical lens used above refers to the axial distance from the first side surface of the first lens to the imaging plane or image source plane; the back focal length (BFL) of the optical lens refers to the axial distance from the second side surface of the eighth lens to the imaging plane or 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).

[0086] 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 an embodiment is described using eight lenses as an example, the optical lens is not limited to including eight lenses. If desired, the optical lens may also include other numbers of lenses.

[0087] In all embodiments of this application, within the range of 0 lp / mm to 60 lp / mm, the modulation transfer function curve decreases smoothly and uniformly from the center to the edge of the field of view, regardless of whether it is in the visible light band or the infrared band, resulting in good image quality and good detail resolution. Specific embodiments of optical lenses applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0088] Example 1

[0089] like Figure 1As shown, the optical lens in this embodiment includes, sequentially from the first side to the second side along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The second lens L2 and the third lens L3 are cemented together to form a first cemented lens, and the sixth lens L6 and the seventh lens L7 are cemented together to form a second cemented lens. Both the first side surface S14 and the second side surface S15 of the eighth lens L8 have at least one inflection point.

[0090] The first lens L1 has negative optical power, with a convex first side surface S1 and a concave second side surface S2. The second lens L2 has negative optical power, with a concave first side surface S3 and a concave second side surface S4. The third lens L3 has positive optical power, with a convex first side surface S4 and a convex second side surface S5. The fourth lens L4 has positive optical power, with a convex first side surface S6 and a convex second side surface S7. The fifth lens L5 has positive optical power, with a convex first side surface S9 and a convex second side surface S10. The sixth lens L6 has negative optical power, with a concave first side surface S11 and a concave second side surface S12. The seventh lens L7 has positive optical power, with a convex first side surface S12 and a convex second side surface S13. The eighth lens L8 has negative optical power, with a convex first side surface S14 and a concave second side surface S15.

[0091] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the eighth lens L8 and the image plane IMA. The filter IR has a first side surface S16 and a second side surface S17, and the protective glass CG has a first side surface S18 and a second side surface S19. 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.

[0092] Table 1 shows the basic parameters of the optical lens of Example 1.

[0093] Table 1

[0094]

[0095] In Example 1, the surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical formula:

[0096]

[0097] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 give the conic coefficient k and higher-order coefficients that can be used for each aspherical surface in Example 1.

[0098] Table 2-1

[0099]

[0100] Table 2-2

[0101]

[0102] like Figure 23a and Figure 23b As shown, regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.7 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0103] Example 2

[0104] like Figure 2 As shown, the main difference between the optical lens of this embodiment and that of Embodiment 1 is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different. Table 3 shows the basic parameters of the optical lens of Embodiment 2.

[0105] Table 3

[0106]

[0107] Tables 4-1 and 4-2 provide the conic coefficient k and higher-order coefficients that can be used for each aspherical surface in Example 2.

[0108] Table 4-1

[0109] Face number k A4 A6 A8 A10 S9 1.7257 -1.3887E-03 1.8676E-04 -9.8362E-05 2.4294E-05 S10 -0.3100 -4.9338E-04 2.0177E-04 -8.9356E-05 2.1497E-05 S14 -103.2124 -1.9510E-03 -2.2712E-05 -2.1746E-05 8.3737E-06 S15 8.3359 -2.2217E-03 -1.6402E-04 7.1846E-05 -1.6738E-05

[0110] Table 4-2

[0111] Face number A12 A14 A16 A18 A20 S9 -3.8914E-06 3.8569E-07 -2.3076E-08 7.5589E-10 -1.0581E-11 S10 -3.3868E-06 3.3918E-07 -2.0774E-08 7.0035E-10 -9.8298E-12 S14 -1.9169E-06 2.6045E-07 -2.0957E-08 9.1802E-10 -1.6856E-11 S15 2.3277E-06 -1.9794E-07 1.0100E-08 -2.8404E-10 3.3853E-12

[0112] like Figure 24a and Figure 24b As shown, regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0113] Example 3

[0114] like Figure 3 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; and the first side surface S11 of the sixth lens L6 is convex. Table 5 shows the basic parameters of the optical lens of Embodiment 3.

[0115] Table 5

[0116]

[0117] Tables 6-1 and 6-2 provide the conic coefficient k and higher-order coefficients that can be used for each aspherical surface in Example 3.

[0118] Table 6-1

[0119]

[0120]

[0121] Table 6-2

[0122] Face number A12 A14 A16 A18 A20 S9 -3.8987E-06 3.8550E-07 -2.3024E-08 7.6173E-10 -1.0773E-11 S10 -3.4289E-06 3.3823E-07 -1.9955E-08 6.4585E-10 -8.7991E-12 S14 -1.8992E-06 2.6078E-07 -2.1014E-08 9.0847E-10 -1.6250E-11 S15 2.3174E-06 -1.9838E-07 1.0126E-08 -2.8083E-10 3.2277E-12

[0123] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.5 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0124] Example 4

[0125] like Figure 4 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; and the first side surface S11 of the sixth lens L6 is convex. Table 7 shows the basic parameters of the optical lens of Embodiment 4.

[0126] Table 7

[0127]

[0128] Tables 8-1 and 8-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 4.

[0129] Table 8-1

[0130] Face number k A4 A6 A8 A10 S9 1.3363 -1.2593E-03 1.8662E-04 -9.4167E-05 2.4319E-05 S10 -0.5129 3.9545E-04 1.7332E-04 -8.0321E-05 2.1322E-05 S14 137.7668 -1.0632E-03 2.9930E-05 -2.5885E-05 8.4370E-06 S15 12.2364 -3.4240E-04 -2.2284E-04 7.4103E-05 -1.6675E-05

[0131] Table 8-2

[0132] Face number A12 A14 A16 A18 A20 S9 -3.8989E-06 3.8547E-07 -2.3026E-08 7.6170E-10 -1.0772E-11 S10 -3.4293E-06 3.3821E-07 -1.9956E-08 6.4586E-10 -8.8003E-12 S14 -1.9012E-06 2.6096E-07 -2.0996E-08 9.0867E-10 -1.6347E-11 S15 2.3204E-06 -1.9838E-07 1.0115E-08 -2.8139E-10 3.2779E-12

[0133] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.5 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0134] Example 5

[0135] like Figure 5 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; the first side surface S11 of the sixth lens L6 is convex; the first side surface S14 of the eighth lens L8 is concave; and there is no inflection point on the first side surface S14 of the eighth lens L8. Table 9 shows the basic parameters of the optical lens of Embodiment 5.

[0136] Table 9

[0137]

[0138] Tables 10-1 and 10-2 provide the conic coefficient k and higher-order coefficients that can be used for each aspherical surface in Example 5.

[0139] Table 10-1

[0140] Face number k A4 A6 A8 A10 S9 1.3310 -1.4004E-03 1.8057E-04 -9.0657E-05 2.3332E-05 S10 -1.7455 4.6994E-04 1.5522E-04 -7.5384E-05 2.0723E-05 S14 149.9555 -1.4846E-03 -8.5810E-06 -2.2264E-05 8.4882E-06 S15 9.3384 -1.1813E-03 -1.7258E-04 6.2890E-05 -1.6449E-05

[0141] Table 10-2

[0142] Face number A12 A14 A16 A18 A20 S9 -3.8140E-06 3.8632E-07 -2.3558E-08 7.8825E-10 -1.1135E-11 S10 -3.4250E-06 3.4522E-07 -2.0375E-08 6.3249E-10 -7.5405E-12 S14 -1.9673E-06 2.6492E-07 -2.0725E-08 8.7264E-10 -1.5316E-11 S15 2.3900E-06 -2.0365E-07 1.0088E-08 -2.6819E-10 2.9334E-12

[0143] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0144] Example 6

[0145] like Figure 6As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; the first side surface S11 of the sixth lens L6 is convex; the first side surface S14 of the eighth lens L8 is concave; and there is no inflection point on the first side surface S14 of the eighth lens L8. Table 11 shows the basic parameters of the optical lens of Embodiment 6.

[0146] Table 11

[0147]

[0148] Tables 12-1 and 12-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 6.

[0149] Table 12-1

[0150] Face number k A4 A6 A8 A10 S9 1.3067 -1.3830E-03 1.8264E-04 -9.0568E-05 2.3332E-05 S10 -1.8892 4.8617E-04 1.5516E-04 -7.5430E-05 2.0724E-05 S14 149.9999 -1.9529E-03 -2.4177E-05 -2.2185E-05 8.4989E-06 S15 8.6449 -1.5714E-03 -1.8325E-04 6.2867E-05 -1.6448E-05

[0151] Table 12-2

[0152]

[0153]

[0154] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0155] Example 7

[0156] like Figure 7 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the second lens L2 is positive, and the second side surface S4 of the second lens L2 is convex; the optical power of the third lens L3 is negative, and the first side surface S4 of the third lens L3 is concave; the eighth lens L8 has no inflection point. Table 13 shows the basic parameters of the optical lens of Embodiment 7.

[0157] Table 13

[0158]

[0159] Tables 14-1 and 14-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 7.

[0160] Table 14-1

[0161] Face number k A4 A6 A8 A10 S9 3.9094 -1.5068E-03 1.5877E-04 -9.0805E-05 2.3287E-05 S10 -3.6343 -2.3602E-03 3.2511E-04 -9.9186E-05 2.3327E-05 S14 0.5834 -4.0245E-03 -6.5740E-05 -1.2587E-05 7.7138E-06 S15 -0.9663 -2.5618E-03 -2.1759E-04 7.5714E-05 -1.6592E-05

[0162] Table 14-2

[0163]

[0164]

[0165] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0166] Example 8

[0167] like Figure 8 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the second lens L2 is positive, and the second side surface S4 of the second lens L2 is convex; the optical power of the third lens L3 is negative, and the first side surface S4 of the third lens L3 is concave; the eighth lens L8 has no inflection point. Table 15 shows the basic parameters of the optical lens of Embodiment 8.

[0168] Table 15

[0169]

[0170] Tables 16-1 and 16-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 8.

[0171] Table 16-1

[0172] Face number k A4 A6 A8 A10 S9 3.9094 -1.5731E-03 1.6044E-04 -9.0828E-05 2.3275E-05 S10 -3.6343 -2.3603E-03 3.2280E-04 -9.9247E-05 2.3333E-05 S14 0.5834 -3.9715E-03 -7.3147E-05 -1.2540E-05 7.7248E-06 S15 -0.9663 -2.5657E-03 -2.2339E-04 7.5668E-05 -1.6582E-05

[0173] Table 16-2

[0174]

[0175]

[0176] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0177] Example 9

[0178] like Figure 9As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the second lens L2 is positive, and the second side surface S4 of the second lens L2 is convex; the optical power of the third lens L3 is negative, and the first side surface S4 of the third lens L3 is concave; the first side surface S11 of the sixth lens L6 is convex; and the second side surface S15 of the eighth lens L8 has no inflection point. Table 17 shows the basic parameters of the optical lens of Embodiment 9.

[0179] Table 17

[0180]

[0181] Tables 18-1 and 18-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 9.

[0182] Table 18-1

[0183] Face number k A4 A6 A8 A10 S9 3.9094 -1.3539E-03 1.7259E-04 -8.9853E-05 2.3392E-05 S10 -3.6343 -1.6361E-03 2.3426E-04 -9.1855E-05 2.3285E-05 S14 0.5834 -3.5340E-03 -8.4022E-05 -1.3191E-05 7.6688E-06 S15 -0.9663 -1.9828E-03 -2.5741E-04 7.6184E-05 -1.6764E-05

[0184] Table 18-2

[0185] Face number A12 A14 A16 A18 A20 S9 -3.8038E-06 3.8451E-07 -2.3564E-08 7.9921E-10 -1.1500E-11 S10 -3.6577E-06 3.5376E-07 -2.0570E-08 6.5950E-10 -8.9596E-12 S14 -1.9819E-06 2.6814E-07 -2.0287E-08 8.1186E-10 -1.3511E-11 S15 2.3130E-06 -1.9723E-07 1.0125E-08 -2.8617E-10 3.4084E-12

[0186] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0187] Example 10

[0188] like Figure 10 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the second lens L2 is positive, and the second side surface S4 of the second lens L2 is convex; the optical power of the third lens L3 is negative, and the first side surface S4 of the third lens L3 is concave; the first side surface S11 of the sixth lens L6 is convex; and the eighth lens L8 has no inflection point. Table 19 shows the basic parameters of the optical lens of Embodiment 10.

[0189] Table 19

[0190]

[0191] Tables 20-1 and 20-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 10.

[0192] Table 20-1

[0193] Face number k A4 A6 A8 A10 S9 3.9094 -2.5549E-03 1.9801E-04 -9.6571E-05 2.3345E-05 S10 -3.6343 -2.3317E-03 1.8651E-04 -8.4813E-05 2.2828E-05 S14 0.5834 -2.9148E-03 -3.1621E-04 2.8495E-05 3.4009E-06 S15 -0.9663 -2.2379E-03 -6.9801E-05 2.8399E-05 -1.2179E-05

[0194] Table 20-2

[0195] Face number A12 A14 A16 A18 A20 S9 -3.7838E-06 3.8330E-07 -2.3499E-08 7.8973E-10 -1.1326E-11 S10 -3.6578E-06 3.5439E-07 -2.0550E-08 6.5718E-10 -8.9284E-12 S14 -1.7745E-06 2.6882E-07 -2.0697E-08 8.1833E-10 -1.3228E-11 S15 2.2237E-06 -2.0630E-07 1.0089E-08 -2.3547E-10 1.7917E-12

[0196] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.5 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0197] Example 11

[0198] like Figure 11 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the eighth lens L8 is positive, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the second side surface S15 of the eighth lens L8. Table 21 shows the basic parameters of the optical lens of Embodiment 11.

[0199] Table 21

[0200]

[0201] Tables 22-1 and 22-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 11.

[0202] Table 22-1

[0203] Face number k A4 A6 A8 A10 S9 1.5482 -1.3270E-03 1.8972E-04 -9.7344E-05 2.4273E-05 S10 0.0498 -5.6676E-04 2.1100E-04 -8.8569E-05 2.1411E-05 S14 -149.9993 -2.0267E-03 -2.6506E-06 -2.1274E-05 8.3511E-06 S15 150.0000 -1.3245E-03 -1.6881E-04 7.2752E-05 -1.6756E-05

[0204] Table 22-2

[0205] Face number A12 A14 A16 A18 A20 S9 -3.8989E-06 3.8636E-07 -2.3156E-08 7.6733E-10 -1.1034E-11 S10 -3.3889E-06 3.3927E-07 -2.0770E-08 7.0599E-10 -1.0201E-11 S14 -1.9207E-06 2.6104E-07 -2.0964E-08 9.1830E-10 -1.6920E-11 S15 2.3262E-06 -1.9791E-07 1.0100E-08 -2.8387E-10 3.3786E-12

[0206] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0207] Example 12

[0208] like Figure 12 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the optical power of the eighth lens L8 is positive, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the second side surface S15 of the eighth lens L8. Table 23 shows the basic parameter table of the optical lens of Embodiment 12.

[0209] Table 23

[0210]

[0211] Tables 24-1 and 24-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 12.

[0212] Table 24-1

[0213] Face number k A4 A6 A8 A10 S9 1.5380 -1.3135E-03 1.8927E-04 -9.7280E-05 2.4275E-05 S10 0.2378 -5.8552E-04 2.1280E-04 -8.8530E-05 2.1405E-05 S14 149.2839 -2.0123E-03 -1.6188E-06 -2.1360E-05 8.3384E-06 S15 -150.0000 -1.2993E-03 -1.7061E-04 7.2721E-05 -1.6757E-05

[0214] Table 24-2

[0215] Face number A12 A14 A16 A18 A20 S9 -3.8991E-06 3.8634E-07 -2.3155E-08 7.6751E-10 -1.1054E-11 S10 -3.3894E-06 3.3926E-07 -2.0769E-08 7.0616E-10 -1.0208E-11 S14 -1.9214E-06 2.6103E-07 -2.0961E-08 9.1849E-10 -1.6931E-11 S15 2.3262E-06 -1.9791E-07 1.0100E-08 -2.8387E-10 3.3789E-12

[0216] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0217] Example 13

[0218] like Figure 13 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; the optical power of the sixth lens L6 is positive, and the first side surface S11 of the sixth lens L6 is convex; the second side surface S12 of the sixth lens L6 is convex; the optical power of the seventh lens L7 is negative, and the first side surface S12 of the seventh lens L7 is concave, and the second side surface S13 of the seventh lens L7 is concave; the optical power of the eighth lens L8 is positive, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the second side surface S15 of the eighth lens L8. Table 25 shows the basic parameter table of the optical lens of Embodiment 13.

[0219] Table 25

[0220]

[0221] Tables 26-1 and 26-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 13.

[0222] Table 26-1

[0223] Face number k A4 A6 A8 A10 S9 1.5641 -1.3504E-03 2.2558E-04 -9.8718E-05 2.2850E-05 S10 8.5254 7.5096E-04 1.8759E-04 -6.6527E-05 1.9039E-05 S14 4.0990 -2.1208E-03 -1.3561E-05 -2.7832E-05 9.1377E-06 S15 150.0000 -7.0606E-04 -2.2398E-04 7.0511E-05 -1.5949E-05

[0224] Table 26-2

[0225] Face number A12 A14 A16 A18 A20 S9 -3.4564E-06 3.4122E-07 -2.1590E-08 7.9841E-10 -1.3263E-11 S10 -3.3168E-06 3.5874E-07 -2.3006E-08 7.9516E-10 -1.1053E-11 S14 -1.9035E-06 2.3712E-07 -1.7508E-08 7.1223E-10 -1.2333E-11 S15 2.2478E-06 -1.9704E-07 1.0448E-08 -3.0475E-10 3.7334E-12

[0226] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0227] Example 14

[0228] like Figure 14 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; the optical power of the sixth lens L6 is positive, and the first side surface S11 of the sixth lens L6 is convex; the second side surface S12 of the sixth lens L6 is convex; the optical power of the seventh lens L7 is negative, and the first side surface S12 of the seventh lens L7 is concave, and the second side surface S13 of the seventh lens L7 is concave; the optical power of the eighth lens L8 is positive, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the second side surface S15 of the eighth lens L8. Table 27 shows the basic parameter table of the optical lens of Embodiment 14.

[0229] Table 27

[0230]

[0231] Tables 28-1 and 28-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 14.

[0232] Table 28-1

[0233] Face number k A4 A6 A8 A10 S9 1.7881 -1.3970E-03 2.8463E-04 -1.0302E-04 2.2286E-05 S10 8.4491 7.2234E-04 1.8042E-04 -6.5795E-05 1.9018E-05 S14 4.8767 -1.9292E-03 -3.4979E-05 -3.1577E-05 1.2313E-05 S15 40.0740 -5.9314E-04 -2.1548E-04 7.0646E-05 -1.5983E-05

[0234] Table 28-2

[0235] Face number A12 A14 A16 A18 A20 S9 -3.3297E-06 3.3591E-07 -2.1793E-08 8.1314E-10 -1.3242E-11 S10 -3.3203E-06 3.5874E-07 -2.2986E-08 7.9551E-10 -1.1155E-11 S14 -2.4479E-06 2.7027E-07 -1.6802E-08 5.4643E-10 -7.0975E-12 S15 2.2481E-06 -1.9689E-07 1.0445E-08 -3.0561E-10 3.7718E-12

[0236] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0237] Example 15

[0238] like Figure 15As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the eighth lens L8. Table 29 shows the basic parameters of the optical lens of Embodiment 15.

[0239] Table 29

[0240]

[0241] Tables 30-1 and 30-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 15.

[0242] Table 30-1

[0243] Face number k A4 A6 A8 A10 S9 1.5585 -1.3775E-03 1.8607E-04 -9.7510E-05 2.4263E-05 S10 -1.1748 -3.8998E-04 2.0981E-04 -8.9016E-05 2.1388E-05 S14 149.9960 -2.5767E-03 -1.1446E-05 -2.0975E-05 8.3568E-06 S15 149.9989 -1.9583E-03 -1.6684E-04 7.2907E-05 -1.6759E-05

[0244] Table 30-2

[0245] Face number A12 A14 A16 A18 A20 S9 -3.8995E-06 3.8633E-07 -2.3157E-08 7.6718E-10 -1.1090E-11 S10 -3.3894E-06 3.3933E-07 -2.0763E-08 7.0626E-10 -1.0250E-11 S14 -1.9218E-06 2.6089E-07 -2.0974E-08 9.1828E-10 -1.6808E-11 S15 2.3255E-06 -1.9790E-07 1.0101E-08 -2.8371E-10 3.3741E-12

[0246] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0247] Example 16

[0248] like Figure 16 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; there is no inflection point on the eighth lens L8. Table 31 shows the basic parameter table of the optical lens of Embodiment 16.

[0249] Table 31

[0250]

[0251] Tables 32-1 and 32-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 16.

[0252] Table 32-1

[0253] Face number k A4 A6 A8 A10 S9 1.5343 -1.3710E-03 1.8637E-04 -9.7323E-05 2.4267E-05 S10 -0.9401 -3.9090E-04 2.0557E-04 -8.8929E-05 2.1409E-05 S14 150.0001 -2.5808E-03 -1.1459E-05 -2.1246E-05 8.3348E-06 S15 -149.9832 -2.1163E-03 -1.6539E-04 7.2959E-05 -1.6764E-05

[0254] Table 32-2

[0255] Face number A12 A14 A16 A18 A20 S9 -3.9000E-06 3.8631E-07 -2.3152E-08 7.6778E-10 -1.1089E-11 S10 -3.3885E-06 3.3929E-07 -2.0770E-08 7.0594E-10 -1.0199E-11 S14 -1.9223E-06 2.6095E-07 -2.0965E-08 9.1852E-10 -1.6889E-11 S15 2.3252E-06 -1.9790E-07 1.0101E-08 -2.8370E-10 3.3715E-12

[0256] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0257] Example 17

[0258] like Figure 17 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S8 of the fourth lens L4 is concave; and the second lens L2 and the third lens L3 are not cemented together. Table 33 shows the basic parameters of the optical lens of Embodiment 17.

[0259] Table 33

[0260]

[0261]

[0262] Tables 34-1 and 34-2 provide the conic coefficient k and higher-order coefficients that can be used for each aspherical surface in Example 17.

[0263] Table 34-1

[0264] Face number k A4 A6 A8 A10 S10 1.4075 -1.3442E-03 1.6770E-04 -9.5113E-05 2.4093E-05 S11 1.1327 -7.2691E-04 2.1751E-04 -8.9244E-05 2.1353E-05 S15 -10.1211 -2.3593E-03 -3.3415E-06 -2.2447E-05 8.4968E-06 S16 1.5259 -2.1062E-03 -1.7443E-04 7.3685E-05 -1.6769E-05

[0265] Table 34-2

[0266] Face number A12 A14 A16 A18 A20 S10 -3.8818E-06 3.8465E-07 -2.3187E-08 7.8614E-10 -1.1987E-11 S11 -3.3840E-06 3.3932E-07 -2.0790E-08 7.0617E-10 -1.0176E-11 S15 -1.9373E-06 2.6159E-07 -2.0829E-08 9.0271E-10 -1.6376E-11 S16 2.3252E-06 -1.9791E-07 1.0105E-08 -2.8395E-10 3.3762E-12

[0267] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.7 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0268] Example 18

[0269] like Figure 18 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S8 of the fourth lens L4 is concave; and the second lens L2 and the third lens L3 are not cemented together. Table 35 shows the basic parameters of the optical lens of Embodiment 18.

[0270] Table 35

[0271]

[0272]

[0273] Tables 36-1 and 36-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 18.

[0274] Table 36-1

[0275] Face number k A4 A6 A8 A10 S10 1.4071 -1.3073E-03 1.6658E-04 -9.4753E-05 2.4099E-05 S11 1.0748 -7.2954E-04 2.2234E-04 -8.9316E-05 2.1347E-05 S15 -4.9186 -2.3315E-03 -4.4104E-08 -2.2524E-05 8.4895E-06 S16 3.3778 -2.0773E-03 -1.7586E-04 7.3721E-05 -1.6773E-05

[0276] Table 36-2

[0277] Face number A12 A14 A16 A18 A20 S10 -3.8839E-06 3.8452E-07 -2.3173E-08 7.8831E-10 -1.2162E-11 S11 -3.3838E-06 3.3933E-07 -2.0791E-08 7.0615E-10 -1.0178E-11 S15 -1.9359E-06 2.6169E-07 -2.0836E-08 9.0155E-10 -1.6311E-11 S16 2.3253E-06 -1.9790E-07 1.0105E-08 -2.8397E-10 3.3763E-12

[0278] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.7 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0279] Example 19

[0280] like Figure 19 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; and the optical power of the eighth lens L8 is positive. Table 37 shows the basic parameters of the optical lens of Embodiment 19.

[0281] Table 37

[0282]

[0283]

[0284] Tables 38-1 and 38-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 19.

[0285] Table 38-1

[0286] Face number k A4 A6 A8 A10 S9 1.0768 -7.3468E-04 -1.1883E-04 1.9130E-05 1.1452E-06 S10 -0.1614 -7.9774E-04 2.1421E-04 -8.7250E-05 2.1081E-05 S14 145.6842 -2.8081E-03 1.8718E-05 -3.6274E-05 1.1328E-05 S15 149.9603 -1.7838E-03 -2.0180E-04 7.5985E-05 -1.6764E-05

[0287] Table 38-2

[0288] Face number A12 A14 A16 A18 A20 S9 -1.6392E-06 3.5023E-07 -3.6395E-08 1.9175E-09 -4.1582E-11 S10 -3.3699E-06 3.3930E-07 -2.0968E-08 7.1967E-10 -1.0528E-11 S14 -2.3465E-06 2.9305E-07 -2.1713E-08 8.6789E-10 -1.4393E-11 S15 2.2968E-06 -1.9638E-07 1.0189E-08 -2.9338E-10 3.5961E-12

[0289] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0290] Example 20

[0291] like Figure 20 As shown, the main differences between the optical lens of this embodiment and that of Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave; and the optical power of the eighth lens L8 is positive. Table 39 shows the basic parameters of the optical lens of Embodiment 20.

[0292] Table 39

[0293]

[0294]

[0295] Tables 40-1 and 40-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 20.

[0296] Table 40-1

[0297] Face number k A4 A6 A8 A10 S9 1.1135 -7.1049E-04 -1.2740E-04 1.9816E-05 1.2320E-06 S10 0.9578 -9.0029E-04 2.1782E-04 -8.7125E-05 2.1099E-05 S14 43.2997 -2.6030E-03 1.2147E-05 -3.2962E-05 1.1297E-05 S15 23.7856 -1.7200E-03 -2.0295E-04 7.6457E-05 -1.6767E-05

[0298] Table 40-2

[0299] Face number A12 A14 A16 A18 A20 S9 -1.6375E-06 3.5005E-07 -3.6426E-08 1.9175E-09 -4.1107E-11 S10 -3.3668E-06 3.3953E-07 -2.0959E-08 7.1989E-10 -1.0546E-11 S14 -2.3569E-06 2.9312E-07 -2.1627E-08 8.7389E-10 -1.4956E-11 S15 2.2961E-06 -1.9637E-07 1.0191E-08 -2.9335E-10 3.5912E-12

[0300] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.7 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0301] Example 21

[0302] like Figure 21 As shown, the main difference between the optical lens of this embodiment and that of Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave. Table 41 shows the basic parameters of the optical lens of Embodiment 21.

[0303] Table 41

[0304]

[0305]

[0306] Tables 42-1 and 42-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 21.

[0307] Table 42-1

[0308] Face number k A4 A6 A8 A10 S9 1.5645 -1.3588E-03 1.9687E-04 -9.8051E-05 2.4331E-05 S10 -0.5642 -1.0836E-04 1.5728E-04 -8.0680E-05 2.1193E-05 S14 -67.1217 -1.8634E-03 -4.4388E-05 -2.1283E-05 8.4965E-06 S15 -6.6692 -2.8390E-03 -1.3375E-04 7.1105E-05 -1.6745E-05

[0309] Table 42-2

[0310] Face number A12 A14 A16 A18 A20 S9 -3.8882E-06 3.8580E-07 -2.3079E-08 7.5596E-10 -1.0440E-11 S10 -3.4298E-06 3.3853E-07 -1.9953E-08 6.4474E-10 -8.8054E-12 S14 -1.9125E-06 2.6028E-07 -2.1024E-08 9.2283E-10 -1.6918E-11 S15 2.3285E-06 -1.9788E-07 1.0100E-08 -2.8423E-10 3.3875E-12

[0311] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.5 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0312] Example 22

[0313] like Figure 22 As shown, the main difference between the optical lens of this embodiment and that of Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S7 of the fourth lens L4 is concave. Table 43 shows the basic parameter table of the optical lens of Embodiment 22.

[0314] Table 43

[0315]

[0316]

[0317] Tables 44-1 and 44-2 provide the conic coefficients k and higher-order coefficients that can be used for each aspherical surface in Example 22.

[0318] Table 44-1

[0319] Face number k A4 A6 A8 A10 S9 1.5507 -1.3399E-03 1.9392E-04 -9.7972E-05 2.4329E-05 S10 -0.1389 -1.9024E-04 1.5534E-04 -8.0851E-05 2.1203E-05 S14 -95.8524 -2.1016E-03 -5.0424E-05 -2.1582E-05 8.4828E-06 S15 -2.9527 -2.9445E-03 -1.4906E-04 7.1851E-05 -1.6732E-05

[0320] Table 44-2

[0321] Face number A12 A14 A16 A18 A20 S9 -3.8894E-06 3.8572E-07 -2.3078E-08 7.5635E-10 -1.0475E-11 S10 -3.4285E-06 3.3850E-07 -1.9967E-08 6.4383E-10 -8.7008E-12 S14 -1.9119E-06 2.6032E-07 -2.1029E-08 9.2228E-10 -1.6849E-11 S15 2.3275E-06 -1.9793E-07 1.0101E-08 -2.8405E-10 3.3839E-12

[0322] Regardless of whether it is in the visible light band or the infrared band, the OTF coefficient of this embodiment is above 0.6 in the entire field of view. In the range of 0 lp / mm to 60 lp / mm, the curve decreases smoothly and evenly from the center to the edge of the field of view, which has good imaging quality and good detail resolution.

[0323] Tables 45-1 and 45-2 provide the basic parameters of the optical lenses used in Examples 1-22. E1-E22 represent Examples 1-22 respectively, FOV is in degrees, θ is in rad, and φ23 and φ are in mm. -1 All other parameters are in mm.

[0324] Table 45-1

[0325]

[0326]

[0327] In summary, the conditional expressions of each embodiment in Examples 1-22 satisfy Tables 46-1 and 46-2.

[0328] Table 46-1

[0329]

[0330] Table 46-2

[0331]

[0332]

[0333] This application also provides an electronic device comprising an 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 a second side of the optical lens, for example, on an imaging surface, and may be, for example, a photocoupled device (CCD), a complementary metal oxide semiconductor device (CMOS), an avalanche photodiode detector (APD), a single-photon avalanche photodiode detector (SPAD), or a silicon photomultiplier (SiPM), etc. Light from the first side is imaged on the second side after passing through the optical lens. The optical lens may be a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, etc. The electronic device may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, a lidar, a microscope, a night vision device, etc., and may include vehicle-mounted cameras, infrared cameras, drone cameras, night vision cameras, security monitoring cameras, lidar, microscopes, night vision devices, etc.

[0334] This application also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens. Optionally, the light source can be an edge-emitting laser (EEL), a vertical-cavity surface-emitting laser (VCSEL), a fiber laser, an LED light source, a fluorescent laser light source, or a tri-color laser light source, etc. 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 area on the first side. The optical lens can be a projection lens, an illumination lens, or a laser radar transmitter lens, etc. The electronic device can be a projector, a lighting lamp, a laser radar, etc., and electronic devices including projectors, lighting lamps, and laser radar. The above description is only a preferred embodiment of this application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the 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 equivalent features 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, wherein the first side surface of the first lens is convex and the second side surface of the first lens is concave; A second lens having optical power, wherein the first side surface of the second lens is concave. A third lens with optical power, wherein the second side surface of the third lens is convex; A fourth lens with positive optical power, wherein the first side surface of the fourth lens is convex; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex and the second side surface of the fifth lens is convex; A sixth lens with optical power; A seventh lens with optical power; An eighth lens with optical power; The optical lens has eight lenses with optical power. The optical lens satisfies: 0.086≤T45 / F4≤0.308; -5.235≤R²² / F²≤-0.233; Wherein, T45 is the distance between the second side surface of the fourth lens and the first side surface of the fifth lens on the optical axis, F4 is the focal length of the fourth lens, R22 is the central radius of curvature of the second side surface of the second lens, and F2 is the focal length of the second lens.

2. The optical lens according to claim 1, characterized in that, The second lens has a negative optical power and a concave second side surface; or, the second lens has a positive optical power and a convex second side surface. The third lens has a positive optical power and a convex first side surface; or, the third lens has a negative optical power and a concave first side surface. The second side surface of the fourth lens is concave; or, the second side surface of the fourth lens is convex. The optical power of the sixth lens is negative, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is concave; or, the optical power of the sixth lens is negative, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave; or, the optical power of the sixth lens is positive, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex. The seventh lens has a positive optical power, and its first side surface is convex, and its second side surface is convex; or, the seventh lens has a negative optical power, and its first side surface is concave, and its second side surface is concave. The eighth lens has a negative optical power, a convex first side surface, and a concave second side surface; or, the eighth lens has a negative optical power, a concave first side surface, and a concave second side surface; or, the eighth lens has a negative optical power, a concave first side surface, and a convex second side surface; or, the eighth lens has a positive optical power, a convex first side surface, and a convex second side surface; or, the eighth lens has a positive optical power, a convex first side surface, and a concave second side surface.

3. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.36≤R11 / TTL≤1.306; 3.185≤R11 / F≤11.563; 0.436≤R21 / R32≤1.187; Wherein, R11 is the center radius of curvature of the first side surface of the first lens, TTL is the total optical length of the optical lens, F is the focal length of the optical lens in the visible light band, R21 is the center radius of curvature of the first side surface of the second lens, and R32 is the center radius of curvature of the second side surface of the third lens.

4. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 7.089≤TTL / F≤10.191; 0.021≤TTL / H / FOV*1°≤0.035; 1.394≤F / ENPD≤1.898; Wherein, TTL is the total optical length of the optical lens, F is the focal length of the optical lens in the visible light band, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, and ENPD is the entrance pupil diameter of the optical lens.

5. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.031≤|(HF*θ) / (F*θ)|≤0.1; 0.009≤D / H / FOV*1°≤0.014; 1.383≤(FOV*H) / (F*180°)≤2.218; Wherein, H is the image height corresponding to the maximum field of view of the optical lens, F is the focal length of the optical lens in the visible light band, θ is the radian value corresponding to the maximum field of view of the optical lens, D is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

6. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies: -2.361≤F1 / F≤-1.406; Wherein, F is the focal length of the optical lens in the visible light band, and F1 is the focal length of the first lens.

7. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies: 0.994 ≤ |F2 / F| ≤ 18.42; Wherein, F is the focal length of the optical lens in the visible light band, and F2 is the focal length of the second lens.

8. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 1.459≤|F3 / F|≤7.602; 2.644≤F4 / F≤12.917; Wherein, F is the focal length of the optical lens in the visible light band, F3 is the focal length of the third lens, and F4 is the focal length of the fourth lens.

9. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies: 1.74≤F5 / F≤3.61; Wherein, F is the focal length of the optical lens in the visible light band, and F5 is the focal length of the fifth lens.

10. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 9; as well as At least one of 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.

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