Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. In order from a first side to a second side along an optical axis, the optical lens comprises: a first lens with negative optical power, a first side surface of the first lens being concave, and a second side surface of the first lens being concave; a second lens with optical power, a first side surface of the second lens being convex, and a second side surface of the second lens being concave; a third lens with positive optical power; a fourth lens with optical power; a fifth lens with optical power, the fifth lens and the fourth lens being opposite in sign of optical power, and the fifth lens and the fourth lens being cemented together; and a sixth lens with positive optical power, a first side surface of the sixth lens being convex; wherein the number of lenses with optical power in the optical lens is six; the optical lens satisfies: 0.1<=|(H-F*theta) / (F*theta)|<=0.3, -8<=R1 / F<=-1.8, and -1.5<=F*(1 / F1+1 / F2)<=-0.5.

Description

Technical Field

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

[0002] In recent years, with the upgrading and iteration of automotive lenses, compared with ordinary optical lenses, automotive lenses have stricter standards and requirements while pursuing safe driving. For example, concealed installation has become the mainstream method for automotive lenses, in order to meet the dual requirements of aesthetic appearance and convenient installation at the same time, and also to promote the development of automotive lenses towards smaller aperture and more compact size.

[0003] Secondly, with the rise of the autonomous driving market, automotive cameras are increasingly being used in driver assistance systems. These cameras need to keep pace with chip development, especially front-view cameras which require megapixel resolution, no ghosting interference, and convenient image recognition. In addition to achieving high-definition imaging, automotive cameras also need to achieve clear recognition in low-light environments, requiring larger apertures.

[0004] In addition, since automotive lenses operate in environments with large temperature differences, they should have good thermal stability to reduce the impact of temperature on imaging performance. Summary of the Invention

[0005] Considering the following problems with existing automotive lenses: they cannot simultaneously meet the requirements of small aperture, high resolution, and miniaturization; although they can achieve megapixel clarity, aberrations such as lens distortion and ghosting cannot be addressed; their light transmission capability is weak, resulting in high imaging noise in low-light environments such as nighttime or rainy days, failing to meet requirements; and the pursuit of high resolution and miniaturization leads to unclear images under high and low temperature conditions. To address at least one of these problems, some embodiments of this application provide an optical lens and electronic device.

[0006] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having negative optical power, wherein a first side surface of the first lens is concave and a second side surface of the first lens is concave; a second lens having optical power, wherein a first side surface of the second lens is convex and a second side surface of the second lens is concave; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having optical power, wherein the optical power of the fifth lens and the fourth lens have opposite signs and are cemented together; and a sixth lens having positive optical power, wherein the sixth lens... The first side surface of the lens is convex; the number of lenses with optical power in the optical lens is six; the optical lens satisfies: 0.1≤|(HF×θ) / (F×θ)|≤0.3, -8≤R1 / F≤-1.8 and -1.5≤F×(1 / F1+1 / F2)≤-0.5; where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, θ is the radian value of the maximum field of view of the optical lens, R1 is the radius of curvature of the first side surface of the first lens, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens.

[0007] With this configuration, the optical lens of this application uses six lenses with optical power. Light from the first side first enters through the first side of the first lens and then exits through the second side of the first lens. The first lens has negative optical power and is biconcave in shape. This not only reduces the risk of surface scratches and bumps by setting the first side as a concave surface, which is conducive to collecting light from a large field of view into the optical system, but also further diverges the light by setting the second side as a concave surface, thereby controlling the aperture of the rear lens and achieving miniaturization. At the same time, by controlling the ratio between the radius of curvature of the first side of the first lens and the total effective focal length of the optical lens, i.e., -8≤R1 / F≤-1.8, the radius of curvature of the first side of the first lens can be reasonably controlled, which is conducive to the first lens to collect light and expand the beam, thereby achieving long focal length and large distortion of the lens. The diverging light rays exiting the first lens enter the second lens: The first side of the second lens is convex, and the second side is concave. This not only allows the convex first side to work with the first lens, facilitating the entry of edge field-of-view rays into the second lens and ensuring their smooth arrival at the rear optical system, reducing light energy loss and contributing to a large field of view, but also allows the concave second side to appropriately diverge the light rays entering through the first side of the second lens and converge them in an upward trend, resulting in smoother light divergence and improved resolution, thus contributing to high resolution. Simultaneously, by controlling the relationship between the effective focal lengths of the first and second lenses and the total effective focal length of the optical lens (-1.5 ≤ F × (1 / F1 + 1 / F2) ≤ -0.5), the focal lengths of the first and second lenses and the optical lens are rationally managed. This allows the first lens to quickly converge and diverge light, while the second lens provides a smooth transition, which is beneficial for long focal lengths and results in a large angular resolution in the imaging center area, leading to superior image quality. The light rays exiting the second lens enter the third lens: The third lens has positive optical power, which facilitates light convergence. Light rays exiting the third lens enter the fourth and fifth lenses: The fourth and fifth lenses have optical powers of opposite signs and are cemented together, which reduces the air gap between the two lenses, making the overall optical system compact. This is beneficial for improving optical performance such as resolution, distortion optimization, and CRA (Chief Ray Angle), and can reduce ghosting to some extent. Light rays exiting the fifth lens enter the sixth lens: The sixth lens has positive optical power and its first side is convex, which is conducive to light convergence and makes the light path transition smoothly. This avoids excessive light loss caused by the large difference between the large field of view light rays and the chip's chief ray when they reach the image plane, which is beneficial for improving the illumination of the edge field of view. At the same time, by controlling the relationship between the image height and radian value corresponding to the maximum field of view of the optical lens and the total effective focal length, i.e., 0.1≤|(HF×θ) / (F×θ)|≤0.3, the focal length of the lens can be reasonably adjusted while keeping the lens field of view and image plane size unchanged, increasing distortion and improving the angular resolution of the center field of view.

[0008] 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. Attached Figure Description

[0009] 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.

[0010] Figures 1 to 11 A schematic diagram of the structure of an optical lens according to Embodiments 1 to 11 of this application is shown;

[0011] Figure 12 A schematic diagram of the modulation transfer function (MTF) of an optical lens according to Embodiment 1 of this application is shown;

[0012] Figure 13 A schematic diagram of the distortion of an optical lens according to Embodiment 1 of this application is shown. Detailed Implementation

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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 formal sense, unless expressly so specified herein.

[0019] 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.

[0020] The features, principles and other aspects of this application are described in detail below.

[0021] An optical lens according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0022] 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 space, 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 space 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.

[0023] 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, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0024] 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.

[0025] In an exemplary embodiment, the first lens may have negative optical power, and its first side surface may be concave, as may its second side surface. The first lens is a negative lens, capable of diverging light. The concave design of the first side surface reduces the risk of surface scratches and impacts, and also facilitates the collection of light rays with a large field of view into the optical system. The concave design of the second side surface of the first lens further diverges light, thereby controlling the aperture of the rear lens and achieving a miniaturized design.

[0026] In an exemplary embodiment, the second lens may have positive or negative optical power, and its first side may be, for example, convex, and its second side may be, for example, concave.

[0027] In the first example, the second lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The second lens is a positive lens and has a meniscus shape convex towards the first side, which facilitates light convergence, allowing the light path to smoothly transition to the rear, thereby reducing the height of the incident light rays and thus reducing the aperture of the rear lens. The second side surface of the second lens is concave, which can diverge light rays entering from the first side surface of the second lens and converge them in an upward trend, resulting in smoother light divergence and thus improving resolution, which is beneficial for obtaining high resolution.

[0028] In the second example, the second lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The second lens being a negative lens is beneficial for receiving light rays entering through the first lens and further smoothing out the light rays collected by the first lens, thus expanding the light width to achieve the required imaging size. Simultaneously, the combination of the second and first lenses, achieving a convex-concave fit between two negative lenses in the same direction, allows for a smoother outgoing light beam, which is beneficial for achieving small aberrations. The first side surface of the second lens being convex facilitates the entry of edge field rays into the second lens and their smooth arrival at the rear optical system, enabling the reception of light rays emitted from the first lens, reducing light energy loss, and achieving a large field of view. The second side surface of the second lens being concave appropriately diverges the upward-sloping light rays emitted from the second side surface of the first lens, allowing for a smooth transition of peripheral light rays and reaching a higher imaging position.

[0029] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, convex or concave, and its second side surface may be, for example, convex or concave.

[0030] In the first example, the third lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The third lens is a positive lens and has a biconvex shape, which can effectively converge diverging light rays from the front, compress the angle of the incident light rays, achieve a smooth transition of light, and allow the diverging light rays to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. The fact that both the first and second sides of the third lens are convex helps to compress the light, converge the light rays diverging through the second lens, and ensure a smooth transition of light paths, allowing them to smoothly enter the rear optical system. It also further reduces the light entering the rear optical system, thus reducing the optical path length of the rear light rays, achieving a shorter TTL, and consequently, miniaturization.

[0031] In the second example, 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 is a positive lens, and the first side surface is concave, which facilitates the collection of forward light rays, reduces the amplitude of changes in light trajectory, and minimizes aberrations. The second side surface of the third lens is convex, which helps to compress the direction of light diffusion and facilitates control over the aperture of the rear lens.

[0032] In an exemplary embodiment, the fourth lens may have positive or negative optical power.

[0033] In the first example, the fourth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, concave. The fourth lens is a negative lens and has a biconcave shape, which makes the light rays have obvious light reversal after entering, ensuring that the edge rays and center rays of each field of view are clearly distinguished, changing the trend of the edge rays, which is beneficial to the aberration correction of the center and edge rays of each field of view, and facilitates the realization of high resolution.

[0034] In the second example, the fourth lens may have negative optical power, and its first side may be, for example, convex, and its second side may be, for example, concave. As a negative lens, the fourth lens diverges light rays, and by controlling its focal length, it can effectively correct various aberrations introduced by the preceding positive lens, thus improving image quality. The first side of the fourth lens is convex and has a gentler shape, which facilitates a smoother transition of light rays entering from the third lens, reducing lens sensitivity.

[0035] In the third example, the fourth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The fourth lens is a positive lens and has a biconvex shape, which helps to further converge the light entering the fourth lens and smoothly enter the rear lens, thereby improving resolution while reducing the rear aperture and achieving miniaturization.

[0036] In an exemplary embodiment, the fifth lens may have positive or negative optical power; however, the optical power of the fifth lens is opposite to that of the fourth lens, which enables a smooth transition of light.

[0037] In the first example, the fifth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The fifth lens is a positive lens and is biconvex in shape, which enables the light rays entering through the fourth lens to be further converged and smoothly enter the rear lens, thereby improving the resolving power of the optical system.

[0038] In the second example, the fifth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, concave. The fifth lens is a negative lens and has a biconcave shape, which facilitates proper light diffusion and, combined with the positive optical power of the fourth lens, further diverges the light converged by the fourth lens. The first side of the fifth lens is concave, which diverges the light emitted from the fourth lens, and the light rays in the edge field of view show an upward trend, which helps the image point on the image plane to move away from the optical axis, achieving a matching effect with a large chip and obtaining a larger image. The second side of the fifth lens is also concave, which diverges the light, allowing it to reach a higher imaging position, reducing the incident angle of light entering the chip, helping to improve illumination and reduce chromatic aberration.

[0039] It is worth noting that cementing the fourth and fifth lenses together to form a cemented doublet reduces the air gap between the two lenses, resulting in a more compact overall optical system structure. It also reduces the number of assembly components between the fourth and fifth lenses, thereby reducing manufacturing processes and lowering costs. Furthermore, cemented lenses can reduce tolerance sensitivity issues such as tilting / eccentricity that occur during lens assembly.

[0040] Understandably, cemented doublet lenses also offer the following advantages: reduced light loss due to lens reflections, thus improving illumination; effective correction of chromatic aberration in the optical system, while retaining some chromatic aberration to balance the system's overall aberration; and the ability to improve resolution, optimize optical performance such as distortion or CRA (chromatic aberration refraction), and reduce ghosting to some extent while maintaining a compact structure. It is worth noting that by appropriately allocating the focal lengths of the fourth and fifth lenses, thermal compensation can be achieved, resulting in good temperature performance.

[0041] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side may be, for example, convex, and its second side may be, for example, convex or concave.

[0042] In the first example, the sixth lens may have positive optical power, and its first side may be, for example, convex, and its second side may be, for example, concave. The sixth lens is a positive lens and has a meniscus shape convex towards the first side, causing light rays to converge before and after passing through the sixth lens, and reducing the upward trend of the light rays. This prevents excessive light loss due to the large difference in light intensity between the large field-of-view rays and the chip's main ray when they reach the image plane, thus improving the illumination at the edge of the field of view. Simultaneously, the gentle shape of the sixth lens allows light rays exiting the fifth lens to smoothly enter the rear, and its larger central thickness further smooths the light path transition, improving astigmatism and field curvature, and enhancing the resolving power of the optical system.

[0043] In the second example, the fourth lens may have positive optical power, and its first side may be, for example, convex, and its second side may be, for example, convex. The fourth lens is a positive lens and has a biconvex shape, which is conducive to light convergence, compresses the angle of incident light, achieves a smooth light transition, allows diverging light to smoothly enter the rear, further makes the light path transition smoothly, and facilitates the reduction of the rear port diameter.

[0044] 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. By disposing of the aperture stop between the third and fourth lenses, it is advantageous to increase the aperture diameter, effectively concentrate the light entering the optical system, reduce the lens apertures at the front and rear ends of the optical system, and decrease the sensitivity of the optical lens during assembly. It should be understood that disposing the aperture stop between the third and fourth lenses is merely exemplary, and this application does not impose specific limitations on it; the aperture stop may be disposed in other positions as needed.

[0045] In an exemplary embodiment, the optical lens can be a spherical lens or an aspherical lens. It should be understood that aspherical lenses can also be plasticized to achieve cost reduction without affecting temperature performance.

[0046] In an exemplary embodiment, the optical lens may further include a filter located between the sixth lens and the image plane to filter light of different wavelengths. It should be understood that the optical lens may also provide a protective glass between the filter and the image plane as needed to prevent damage to internal components (e.g., chips) of the optical lens.

[0047] 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).

[0048] In an exemplary embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view can satisfy: 0.5 ≤ F / H ≤ 1. Preferably, 0.62 ≤ F / H ≤ 0.8. Further, 0.685 ≤ F / H ≤ 0.728. By controlling this relationship, the ratio between the total effective focal length and the image height of the optical lens can be controlled within a certain range, which is beneficial to improving lens resolution. It is understood that further ranges of each relationship disclosed in this application (such as 0.685 ≤ F / H ≤ 0.728) can achieve better results and achieve higher imaging quality.

[0049] In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: |F2 / F|≥4. Preferably, 1200≥|F2 / F|≥6.5. Further, 1049.506≥|F2 / F|≥7.243. By controlling this relationship, the second lens is controlled to have a larger focal length, allowing light to transition effectively and smoothly, which is beneficial for correcting aberrations and achieving high resolution. It should be understood that the larger the absolute value of the effective focal length of the second lens, the smaller its impact on the light trajectory; for example, in Embodiment 2 below, the absolute value of the effective focal length of the second lens is 4278.838. When the absolute value of the effective focal length of the second lens is greater than 4278.838, especially when it is infinitely large, the second lens has almost no impact on the light trajectory, which is beneficial for achieving a smooth transition of light.

[0050] In an exemplary embodiment, the total effective focal length F of the optical lens, the effective focal length F2 of the second lens, and the effective focal length F3 of the third lens can satisfy: 0.05 ≤ F × (1 / F2 + 1 / F3) ≤ 1.5. Preferably, 0.085 ≤ F × (1 / F2 + 1 / F3) ≤ 1.2. Further, 0.101 ≤ F × (1 / F2 + 1 / F3) ≤ 0.975. By controlling this relationship, the optical power of the second and third lenses is controlled to be used in a positive and negative combination, and the combined optical power and the total effective focal length of the optical lens are within the above range, which can effectively correct the astigmatism of the lens and improve the resolution of the lens.

[0051] In an exemplary embodiment, the center thickness d6 of the sixth lens on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.13 ≤ d6 / TTL ≤ 0.3. Preferably, 0.15 ≤ d6 / TTL ≤ 0.29. Further, 0.153 ≤ d6 / TTL ≤ 0.281. By controlling this relationship, the center thickness of the sixth lens can be reasonably controlled within a certain range, which is beneficial for smooth light transition, correction of field curvature, and achievement of high resolution. It is understood that, considering cost, the center thickness of the sixth lens mentioned in this application should not be too large.

[0052] In an exemplary embodiment, the Abbe number Vd2 of the second lens and the Abbe number Vd3 of the third lens can satisfy: 0.4 ≤ Vd2 / Vd3 ≤ 1.2. Preferably, 0.5 ≤ Vd2 / Vd3 ≤ 1.1. Further, 0.649 ≤ Vd2 / Vd3 ≤ 1. By controlling this relationship, the Abbe numbers of the second and third lenses can be reasonably selected, which is beneficial for correcting chromatic aberration and improving resolving power.

[0053] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: 1.1 ≤ F6 / F ≤ 3.5. Preferably, 1.25 ≤ F6 / F ≤ 3.2. Further, 1.744 ≤ F6 / F ≤ 3.146. By controlling this relationship, the focal length of the sixth lens is kept positive, which can converge light, reduce the rear aperture, and ensure that distortion is increased and the angular resolution at the center remains unchanged while keeping the lens field of view and image plane size constant.

[0054] In an exemplary embodiment, the radius of curvature R1 of the first side surface of the first lens and the total effective focal length F of the optical lens can satisfy: -8 ≤ R1 / F ≤ -1.8. Preferably, -6.2 ≤ R1 / F ≤ -2.4. Further, -5.508 ≤ R1 / F ≤ -2.814. By controlling this relationship, the ratio of the radius of curvature of the first side surface of the first lens to the total effective focal length is controlled, which is beneficial for the first lens to achieve light collection and beam expansion, and to achieve long focal length and large distortion of the lens.

[0055] In an exemplary embodiment, as in Embodiment 4 and Embodiment 10 below, the on-axis distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens and the overall optical length TTL of the optical lens may satisfy: 0.095 ≤ d56 / TTL ≤ 0.18. Preferably, 0.11 ≤ d56 / TTL ≤ 0.15. Further, 0.122 ≤ d56 / TTL ≤ 0.147. By controlling this relationship, reasonably controlling the relatively large distance between the fourth lens and the fifth lens is beneficial for having a longer distance for correcting various aberrations after the light exits through the fifth lens, and improving the imaging quality.

[0056] In an exemplary embodiment, as in Embodiments 1 to 3, Embodiments 5 to 9, and Embodiment 11 below, the on-axis distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens and the overall optical length TTL of the optical lens may satisfy: 0 < d56 / TTL ≤ 0.08. Preferably, 0.003 ≤ d56 / TTL ≤ 0.075. Further, 0.004 ≤ d56 / TTL ≤ 0.076. By controlling this relationship, reasonably controlling the relatively small distance between the fourth lens and the fifth lens is beneficial for miniaturization, and at the same time, it can also avoid affecting the aperture due to excessive divergence of light.

[0057] In an exemplary embodiment, the overall optical length TTL of the optical lens, the total effective focal length F of the optical lens, and the maximum field angle FOV of the optical lens may satisfy: 0.035 ≤ TTL / (F × FOV) × 1° ≤ 0.08. Preferably, 0.05 ≤ TTL / (F × FOV) × 1° ≤ 0.065. Further, 0.051 ≤ TTL / (F × FOV) × 1° ≤ 0.055. By controlling this relationship, it is possible to effectively limit the length of the lens under the condition of the same lens focal length and maximum field angle, which is beneficial for realizing the miniaturization of the lens.

[0058] Similarly, in an exemplary embodiment, the overall optical length TTL of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens may satisfy: 2.5 ≤ TTL / (F × θ) ≤ 4. Preferably, 2.9 ≤ TTL / (F × θ) ≤ 3.5. Further, 2.934 ≤ TTL / (F × θ) ≤ 3.168. By controlling this relationship, it is possible to effectively limit the length of the lens under the condition of the same lens focal length and maximum field angle, which is beneficial for realizing the miniaturization of the lens.

[0059] In an exemplary embodiment, the total optical length TTL of the optical lens and the total effective focal length F of the optical lens may satisfy: 4 ≤ TTL / F ≤ 6.5. Preferably, 5 ≤ TTL / F ≤ 6. Further, 5.12 ≤ TTL / F ≤ 5.528. By controlling this relationship, reasonably controlling the ratio between the total optical length and the focal length of the lens can effectively limit the length of the lens, which is beneficial to realizing the miniaturization of the lens.

[0060] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: -2 ≤ F1 / F ≤ -0.8. Preferably, -1.6 ≤ F1 / F ≤ -1. Further, -1.349 ≤ F1 / F ≤ -1.083. By controlling this relationship, reasonably controlling the first lens as a negative lens and further reasonably distributing the focal lengths of the lenses is beneficial for light with a large viewing angle to enter the optical system, realizing long focal length, large distortion, and miniaturization.

[0061] In an exemplary embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens may satisfy: 1.6 ≤ F / EPND ≤ 2.2. Preferably, 1.7 ≤ F / EPND ≤ 2.1. Further, 1.792 ≤ F / EPND ≤ 2. By controlling this relationship, reasonably controlling the total effective focal length and the entrance pupil diameter of the optical lens can achieve a small FNO (f-number) of the optical lens, which is beneficial to increasing the light transmission amount and improving the relative illuminance.

[0062] In an exemplary embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens may satisfy: -7 ≤ F45 / F ≤ 8.5. Preferably, -5 ≤ F45 / F ≤ 7. Further, -3.862 ≤ F45 / F ≤ 5.65. By controlling this relationship, reasonably controlling the focal length distribution of the fourth lens and the fifth lens helps to achieve thermal compensation and obtain good temperature performance.

[0063] In an exemplary embodiment, the radius of curvature R4 of the second side of the second lens and the total optical length TTL of the optical lens may satisfy: 0 < R4 / TTL ≤ 0.4. Preferably, 0.12 ≤ R4 / TTL ≤ 0.32. Further, 0.147 ≤ R4 / TTL ≤ 0.302. By controlling this relationship, reasonably controlling the radius of curvature of the second side of the second lens helps to change the light reflection path of the ghost image on the second side of the second lens, and further changes the optical path, making the ghost image more divergent when converging on the image plane and the energy level weaker, thereby weakening the ghost image.

[0064] In an exemplary embodiment, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens may satisfy: 0.1 ≤ |(H - F×θ) / (F×θ)| ≤ 0.3. Preferably, 0.125 ≤ |(H - F×θ) / (F×θ)| ≤ 0.25. Further, 0.163 ≤ |(H - F×θ) / (F×θ)| ≤ 0.213. By controlling this relationship, while ensuring that the field angle of the lens and the size of the imaging surface remain unchanged, the focal length of the lens can be reasonably adjusted, the distortion can be increased, and the angular resolution of the central field can be improved.

[0065] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 0 < F3 / F ≤ 15. Preferably, 0.5 ≤ F3 / F ≤ 12. Further, 0.972 ≤ F3 / F ≤ 9.121. By controlling this relationship, the third lens is controlled to be a positive lens, which can refract the light rays with a diverging and rising trend in the front, quickly converge the light rays, make the light rays converge faster in the lens, avoid the further divergence of the light rays emitted in the front, reduce the total optical length and the rear aperture, collect the front light rays, avoid light loss, and improve the imaging quality.

[0066] In an exemplary embodiment, the effective focal length F4 of the fourth lens, the effective focal length F5 of the fifth lens, and the total effective focal length F of the optical lens may satisfy: 1.2 ≤ (|F4| + |F5|) / F ≤ 20. Preferably, 1.5 ≤ (|F4| + |F5|) / F ≤ 18. Further, 1.652 ≤ (|F4| + |F5|) / F ≤ 15.238. By controlling this relationship, the ratio of the sum of the focal lengths of the fourth lens and the fifth lens to the total focal length of the optical lens is reasonably controlled to be small, so that the light rays can transition quickly in the cemented lens, which is beneficial to miniaturization.

[0067] In an exemplary embodiment, the radius of curvature R3 of the first side surface of the second lens, the radius of curvature R4 of the second side surface of the second lens, and the central thickness d2 of the second lens on the optical axis may satisfy: 0.65 ≤ R3 / (R4 + d2) ≤ 1.1. Preferably, 0.7 ≤ R3 / (R4 + d2) ≤ 0.95. Further, 0.66 ≤ R3 / (R4 + d2) ≤ 0.88. By controlling this relationship, the radius of curvature and the central thickness on both sides of the second lens are reasonably controlled to have a shape similar to concentric circles, ensuring that the deflection angle between the incident light rays and the outgoing light rays is small, generating small aberration, and being beneficial to achieving high resolution.

[0068] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F6 of the sixth lens can satisfy: -1≤F1 / F6≤-0.25. Preferably, -0.9≤F1 / F6≤-0.3. Further, -0.635≤F1 / F6≤-0.415. By controlling this relationship, the optical power of the first and sixth lenses can be reasonably allocated, allowing the light collected by the system to converge on the image plane at the rear end, achieving a larger central angular resolution and improving image quality.

[0069] In an exemplary embodiment, the maximum field of view (FOV) of the optical lens, the image height (H) corresponding to the maximum field of view, and the total effective focal length (F) of the optical lens can satisfy: 60° ≤ FOV × F / H ≤ 80°. Preferably, 65° ≤ FOV × F / H ≤ 75°. Further, 68.472° ≤ FOV × F / H ≤ 72.806°. By controlling this relationship, the focal length, maximum field of view, and image height of the lens can be managed, allowing the lens to achieve both a large field of view and a long focal length.

[0070] In an exemplary embodiment, the radius of curvature R2 of the second side surface of the first lens, the axial distance d12 between the second side surface of the first lens and the first side surface of the second lens, and the radius of curvature R3 of the first side surface of the second lens can satisfy: 0.2 ≤ (R2 + d12) / R3 ≤ 1.5. Preferably, 0.3 ≤ (R2 + d12) / R3 ≤ 1.25. Further, 0.577 ≤ (R2 + d12) / R3 ≤ 1.131. By controlling this relationship, the radii of curvature of the second side surface of the first lens and the first side surface of the second lens, as well as the air gap between the front and rear lenses, are kept small, allowing the light collected by the first lens to be effectively diverged and expanded, thus achieving a large field of view and telephoto focal length for the optical lens.

[0071] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 0 < |F1 / F2| ≤ 0.22. Preferably, 0.001 < |F1 / F2| ≤ 0.185. Further, 0.001 < |F1 / F2| ≤ 0.164. By controlling this relationship, the focal length ratio of the first lens and the second lens can be reasonably managed, enabling the system to smoothly collect light from a large field of view. Furthermore, configuring a second lens with a larger focal length allows for a smoother light transition, avoiding the introduction of large field-of-view aberrations.

[0072] In an exemplary embodiment, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens can satisfy the following condition: 0.015 ≤ BFL / TTL ≤ 0.28. Preferably, 0.025 ≤ BFL / TTL ≤ 0.25. Further, 0.047 ≤ BFL / TTL ≤ 0.24. By controlling this relationship, the back focal length and optical total length of the optical lens can be balanced, which is beneficial for miniaturization and back-end module assembly.

[0073] In an exemplary embodiment, the radius of curvature R3 of the first side surface of the second lens and the effective focal length F1 of the first lens can satisfy: -2.8 ≤ R3 / F1 ≤ -0.3. Preferably, -2.5 ≤ R3 / F1 ≤ -0.6. Further, -2.029 ≤ R3 / F1 ≤ -0.772. By controlling this relationship, the curvature of the first side surface of the second lens is controlled to regulate the incident light rays, making the central field of view rays and the peripheral field of view rays more distinct, which is beneficial for achieving large distortion and improving the resolution of the central region.

[0074] In an exemplary embodiment, the radius of curvature R4 of the second side surface of the second lens and the effective focal length F3 of the third lens can satisfy: 0.08 ≤ R4 / F3 ≤ 2. Preferably, 0.1 ≤ R4 / F3 ≤ 1.85. Further, 0.119 ≤ R4 / F3 ≤ 1.631. By controlling this relationship, the ratio of the radius of curvature of the second side surface of the second lens to the focal length of the third lens is controlled, preventing excessive light dispersion that could affect the system aperture.

[0075] In an exemplary embodiment, the axial distance d23 between the second side surface of the second lens and the first side surface of the third lens, the axial distance d12 between the second side surface of the first lens and the first side surface of the second lens, the center thickness d2 of the second lens on the optical axis, and the effective focal length F2 of the second lens can satisfy: 0 < (d23 + d12 + d2) / F2 ≤ 0.175. Preferably, 0.001 ≤ (d23 + d12 + d2) / F2 ≤ 0.15. Further, 0.001 ≤ (d23 + d12 + d2) / F2 ≤ 0.131. By controlling this relationship, the distances before and after the second lens and the focal length of the second lens itself can be controlled, allowing the light emitted through the second lens to transition smoothly, achieving a long focal length and low sensitivity of the lens.

[0076] In an exemplary embodiment, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, and the total effective focal length F of the optical lens can satisfy: -1.5 ≤ F × (1 / F1 + 1 / F2) ≤ -0.5. Preferably, -1.25 ≤ F × (1 / F1 + 1 / F2) ≤ -0.6. Further, -1.002 ≤ F × (1 / F1 + 1 / F2) ≤ -0.705. By controlling this relationship, the focal lengths of the first lens, the second lens, and the optical lens are controlled, allowing the first lens to quickly converge and diverge light, while the second lens provides a smooth transition. This facilitates achieving a telephoto lens, resulting in a larger angular resolution in the central region during imaging and superior image quality.

[0077] It is worth noting that this application can also achieve telephoto and large distortion of optical lenses through the mutual combination of the relation 0.1≤|(HF×θ) / (F×θ)|≤0.3, the relation -8≤R1 / F≤-1.8 and the relation -1.5≤F×(1 / F1+1 / F2)≤-0.5.

[0078] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the six lenses mentioned above. By rationally allocating the optical parameters of each lens, one or more advantages of the optical lens, such as small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, large distortion, small principal beam angle, high illumination, and manufacturability, are achieved. Furthermore, it can be well matched with various application chips, such as automotive chips, and can effectively suppress vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of applications such as automotive applications.

[0079] 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; the optical back focal length (BFL) of the optical lens refers to the axial distance from the second side of the sixth 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).

[0080] Furthermore, this application focuses on protecting the lens structure, and the lens surface shape is not limited to spherical or aspherical; if the focus is on image quality, the lens can be made entirely of aspherical lenses. The lens material is also not limited to plastic and glass; if the focus is on temperature performance, the lens can be made entirely of glass lenses.

[0081] 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 six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If desired, the optical lens may also include other numbers of lenses.

[0082] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units for the radius of curvature and thickness / distance in the basic parameters of the optical lens are mm.

[0083] Example 1

[0084] The following is for reference Figure 1 The optical lens according to Embodiment 1 of this application is described.

[0085] like Figure 1 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. 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.

[0086] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0087] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0088] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0089] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface is concave.

[0090] The fifth lens L5 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex.

[0091] The sixth lens L6 has positive optical power, with its first side surface S10 being convex and its second side surface S11 being concave.

[0092] An image plane IMA is disposed on the second side of the optical lens. A filter IR is disposed between the sixth lens L6 and the image plane IMA. The filter IR has a first side surface S12 and a second side surface S13. A protective glass CG is disposed between the filter IR and the image plane IMA. The protective glass CG has a first side surface S14 and a second side surface S15. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on 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.

[0093] Table 1 shows the basic parameters of the optical lens of Embodiment 1. It should be understood that the second side surface of the fourth lens L4 has exactly the same surface profile parameters as the first side surface S8 of the fifth lens L5.

[0094] Table 1

[0095]

[0096] from Figure 12 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) in each field of view can reach above 0.65; from Figure 13 As can be seen, the optical lens of Embodiment 1 introduces greater distortion at the edges, which is beneficial for highlighting the image quality of the central area. Therefore, the optical lens provided in Embodiment 1 has good image quality and can meet the high image quality requirements of three megapixels.

[0097] Example 2

[0098] The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second side surface S6 of the third lens L3 is concave, while the first side surface S7 of the fourth lens L4 is convex. Table 2 shows the basic parameters of the optical lens of Embodiment 2.

[0099] Table 2

[0100]

[0101] Tests have shown that the optical lens provided in Example 2 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0102] Example 3

[0103] The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second lens has positive optical power, the second side surface S6 of the third lens L3 is concave, and the second side surface S11 of the sixth lens L6 is convex. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0104] Table 3

[0105]

[0106] Tests have shown that the optical lens provided in Example 3 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0107] Example 4

[0108] The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the fourth lens L4 has positive optical power, with its first side surface S7 being convex and its second side surface being convex; the fifth lens L5 has negative optical power, with its first side surface S8 being concave and its second side surface S9 being concave; and the second side surface S11 of the sixth lens L6 is convex. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0109] Table 4

[0110]

[0111] Tests have shown that the optical lens provided in Example 4 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0112] Example 5

[0113] The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0114] Table 5

[0115]

[0116] Tests have shown that the optical lens provided in Example 5 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0117] Example 6

[0118] The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the first side surface S5 of the third lens L3 is concave, while the first side surface S7 of the fourth lens L4 is convex. Table 6 shows the basic parameters of the optical lens of Embodiment 6.

[0119] Table 6

[0120]

[0121] Tests have shown that the optical lens provided in Example 6 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0122] Example 7

[0123] The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the first side surface S5 of the third lens L3 is concave, while the first side surface S7 of the fourth lens L4 is convex. Table 7 shows the basic parameters of the optical lens of Embodiment 7.

[0124] Table 7

[0125]

[0126] Tests have shown that the optical lens provided in Example 7 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0127] Example 8

[0128] The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is convex. Table 8 shows the basic parameters of the optical lens of Embodiment 8.

[0129] Table 8

[0130]

[0131] Tests have shown that the optical lens provided in Example 8 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0132] Example 9

[0133] The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second lens L2 has positive optical power, the second side surface S6 of the third lens L3 is concave, and the second side surface S11 of the sixth lens L6 is convex. Table 9 shows the basic parameters of the optical lens of Embodiment 9.

[0134] Table 9

[0135]

[0136] Tests have shown that the optical lens provided in Example 9 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0137] Example 10

[0138] The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the fourth lens L4 has positive optical power, with its first side surface S7 being convex and its second side surface being convex; the fifth lens L5 has negative optical power, with its first side surface S8 being concave and its second side surface S9 being concave; and the second side surface S11 of the sixth lens L6 is convex. Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0139] Table 10

[0140]

[0141] Tests have shown that the optical lens provided in Example 10 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0142] Example 11

[0143] The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second lens L2 has positive optical power, the second side surface S6 of the third lens L3 is concave, and the first side surface S7 of the fourth lens L4 is convex. Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0144] Table 11

[0145]

[0146] Tests have shown that the optical lens provided in Example 11 has good imaging quality and can meet the high imaging quality requirements of three megapixels.

[0147] Tables 12-1 and 12-2 provide the basic parameters of the optical lenses in Examples 1 to 11, such as TTL, F, FOV, H, ENPD, θ, F1, F2, F3, F4, F5, F6, F45, d6, d56, R1, R2, R3, R4, Vd2, Vd3, d2, d12, BFL, and d23. The unit for FOV in the tables is °, the unit for θ is the radian value corresponding to FOV, and the units for other parameters are mm.

[0148] Table 12-1

[0149]

[0150] Table 12-2

[0151]

[0152] In summary, the relationships in each of the embodiments in Examples 1 to 11 satisfy the relationships shown in Tables 13-1 and 13-2.

[0153] Table 13-1

[0154]

[0155] Table 13-2

[0156]

[0157] This application also provides an electronic device, which includes at least one of the optical lens, imaging element, and light source in the above exemplary embodiments; wherein the imaging element is used to convert the 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, and forms an image or illuminated area on the first side of the optical lens.

[0158] It is worth noting that the electronic device can be, but is not limited to, a lidar, a camera, or a projection lamp. Accordingly, the optical lens can serve as a light-emitting lens or a light-receiving lens. For example, in the case of a camera, the electronic device may include the optical lens described in the exemplary embodiments above and a photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal. The photoelectric sensor is disposed on a second side of the optical lens, for example, on the imaging surface, and can be implemented as a photocoupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0159] When the electronic device is a projection lamp, it may include the optical lens and light source described in the exemplary embodiments above, with the light source located on the second side of the optical lens. Light emitted from the light source is projected onto the first side of the optical lens after passing through it, forming an image or illuminating an area on the first side.

[0160] Furthermore, when the electronic device is a lidar, the receiving lens of the lidar can be implemented as the aforementioned optical lens, with the first side of the optical lens being the object side and the second side of the optical lens being the image side.

[0161] It is worth noting that the electronic device implemented as a lidar can include a first device and a second device. The first device can be implemented as a lidar transmitter, and the second device can be implemented as a lidar receiver. The first device can include the optical lens and light source in the exemplary embodiments described 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 can include the optical lens in the exemplary embodiments described above and a photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal. The photoelectric sensor is disposed on the second side of the optical lens (e.g., disposed on the imaging surface). The photoelectric sensor can be implemented as 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.

[0162] It is worth mentioning that this application also provides a vehicle that may include the aforementioned electronic equipment for acquiring information.

[0163] 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 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 concept of this application. For example, technical solutions formed by substituting the above-described 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 having negative optical power, wherein the first side surface of the first lens is concave and the second side surface of the first lens is concave; A second lens with optical power, wherein the first side surface of the second lens is convex and the second side surface of the second lens is concave; A third lens with positive optical power; A fourth lens with optical power; A fifth lens having optical power, wherein the sign of the optical power of the fifth lens is opposite to that of the fourth lens, and they are cemented together; and A sixth lens with positive optical power, wherein the first side surface of the sixth lens is convex; The optical lens contains six lenses with optical power. The optical lens satisfies the following conditions: 0.1≤|(HF×θ) / (F×θ)|≤0.3, -8≤R1 / F≤-1.8, 1.1≤F6 / F≤3.5, and -1.5≤F×(1 / F1+1 / F2)≤-0.5; Wherein, H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, θ is the radian value of the maximum field of view of the optical lens, R1 is the radius of curvature of the first side of the first lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F6 is the effective focal length of the sixth lens.

2. The optical lens according to claim 1, characterized in that, The second lens has positive or negative optical power; Alternatively, the first side surface of the third lens is convex, and the second side surface of the third lens is either convex or concave; or the first side surface of the third lens is concave, and the second side surface of the third lens is convex. Alternatively, the fourth lens has negative optical power, the first side of the fourth lens is concave or convex, and the second side of the fourth lens is concave; or the fourth lens has positive optical power, the first side of the fourth lens is convex, and the second side of the fourth lens is convex. Alternatively, the fifth lens may have positive optical power, with its first side surface being convex and its second side surface being convex; or the fifth lens may have negative optical power, with its first side surface being concave and its second side surface being concave. Alternatively, the second side surface of the sixth lens may be convex or concave.

3. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies the following conditions: 1.25 ≤ F6 / F ≤ 3.2; Wherein, F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens.

4. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 0.65≤R3 / (R4+d2)≤1.1; Wherein, R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, and d2 is the center thickness of the second lens on the optical axis.

5. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: -1≤F1 / F6≤-0.25; Wherein, F1 is the effective focal length of the first lens, and F6 is the effective focal length of the sixth lens.

6. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 0.2≤(R2+d12) / R3≤1.5; Wherein, R2 is the radius of curvature of the second side surface of the first lens, d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens, and R3 is the radius of curvature of the first side surface of the second lens.

7. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 4≤TTL / F≤6.5; Where TTL is the total optical length of the optical lens, and F is the total effective focal length of the optical lens.

8. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 0 < |F1 / F2| ≤ 0.22; Wherein, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens.

9. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: |F2 / F|≥4; Wherein, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens.

10. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 0 < (d2³ + d1² + d2) / F2 ≤ 0.175; Wherein, d23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens, d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens, d2 is the center thickness of the second lens on the optical axis, and F2 is the effective focal length of the second lens.

11. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies the following condition: 60°≤FOV×F / H≤80°; Wherein, FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

12. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies the following condition: 0.095≤d56 / TTL≤0.18; Wherein, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, and TTL is the total optical length of the optical lens.

13. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies: 0 <d56 / TTL≤0.08; Wherein, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, and TTL is the total optical length of the optical lens.

14. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.5≤F / H≤1, 0.05≤F×(1 / F2+1 / F3)≤1.5, 0.13≤d6 / TTL≤0.3, 0.4≤Vd2 / Vd3≤1.2, 0.035≤TTL / (F×FOV)×1°≤0.08, 2.5≤TTL / (F×θ)≤4, -2≤F1 / F≤-0.8, 1.6≤F / EPND≤2.2, -7≤F45 / F≤8.5, 0 <R4 / TTL≤0.4、0<F3 / F≤15、1.2≤(|F4|+|F5|) / F≤20、0.015≤BFL / TTL≤0.28、-2.8≤R3 / F1≤-0.3、0.08≤R4 / F3≤2; Wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, d6 is the center thickness of the sixth lens on the optical axis, TTL is the total optical length of the optical lens, Vd2 is the Abbe number of the second lens, Vd3 is the Abbe number of the third lens, FOV is the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F1 is the effective focal length of the first lens, ENPD is the entrance pupil diameter of the optical lens, F45 is the combined focal length of the fourth and fifth lenses, R4 is the radius of curvature of the second side surface of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, BFL is the optical back focal length of the optical lens, and R3 is the radius of curvature of the first side surface of the second lens.

15. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.62≤F / H≤0.8, 1200≥|F2 / F|≥6.5, 0.085≤F×(1 / F2+1 / F3)≤1.2, 0.15≤d6 / TTL≤0.29, 0.5≤Vd2 / Vd3≤1.1, -6.2≤R1 / F≤-2.4, 0.11≤d56 / TTL≤0.15 or 0.003≤d56 / TTL≤0.075, 0.05≤TTL / (F×FOV)×1°≤0.065, 2.9≤TTL / (F×θ)≤3.5, 5≤TTL / F≤6, -1.6≤F1 / F≤-1, 1.7≤F / EPND≤2.1, -5≤F45 / F≤7, 0.12≤R4 / T TL≤0.32, 0.125≤|(HF×θ) / (F×θ)|≤0.25, 0.5≤F3 / F≤12, 1.5≤(|F4|+|F5|) / F≤1 8. 0.7≤R3 / (R4+d2)≤0.95, -0.9≤F1 / F6≤-0.3, 65°≤FOV×F / H≤75°, 0.3≤(R2+d12) / R3≤1.25, 0.001<|F1 / F2|≤0.185, 0.025≤BFL / TTL≤0.25, -2.5≤R3 / F1≤-0.6, 0.1≤R4 / F3≤1.85, 0.001≤(d23+d12+d2) / F2≤0.15, -1.25≤F×(1 / F1+1 / F2)≤-0.6; Wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, d6 is the center thickness of the sixth lens on the optical axis, TTL is the total optical length of the optical lens, Vd2 is the Abbe number of the second lens, Vd3 is the Abbe number of the third lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, FOV is the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, and F1 is the total effective focal length of the second ... third lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, d6 is the center thickness of the sixth lens on the optical axis, TTL is the total optical length of the optical lens, TTL is the total optical length of the optical lens, TTL is the total optical length of the optical lens, T The effective focal length of the first lens is given by: ENPD is the entrance pupil diameter of the optical lens; F45 is the combined focal length of the fourth and fifth lenses; R4 is the radius of curvature of the second side surface of the second lens; F4 is the effective focal length of the fourth lens; F5 is the effective focal length of the fifth lens; R3 is the radius of curvature of the first side surface of the second lens; d2 is the center thickness of the second lens on the optical axis; R2 is the radius of curvature of the second side surface of the first lens; d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens; BFL is the optical back focal length of the optical lens; and d23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens.

16. The optical lens according to claim 1 or claim 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.685≤F / H≤0.728, 1049.506≥|F2 / F|≥7.243, 0.101≤F×(1 / F2+1 / F3)≤0.975, 0.153≤d6 / TTL≤0.281, 0.649≤Vd2 / Vd3≤1, 1.744≤F6 / F≤3.146, -5.508≤R1 / F≤-2.814, 0 .122≤d56 / TTL≤0.147 or 0.004≤d56 / TTL≤0.076, 0.051≤TTL / (F×FOV)×1°≤0.055, 2.934≤TTL / (F×θ)≤3.168, 5.12≤TTL / F≤5.528, -1.349≤F1 / F≤-1.083, 1.792≤F / EPND≤2, -3.862≤F45 / F≤5.65 , 0.147≤R4 / TTL≤0.302, 0.163≤|(HF×θ) / (F×θ)|≤0.213, 0.972≤F3 / F≤9.121, 1.652≤(|F4|+|F 5|) / F≤15.238, 0.66≤R3 / (R4+d2)≤0.88, -0.635≤F1 / F6≤-0.415, 68.472°≤FOV×F / H≤72.806°, 0.577≤(R2+d12) / R3≤1.131, 0.001<|F1 / F2|≤0.164, 0.047≤BFL / TTL≤0.24, -2.029≤R3 / F1≤-0 .772, 0.119≤R4 / F3≤1.631, 0.001≤(d23+d12+d2) / F2≤0.131, -1.002≤F×(1 / F1+1 / F2)≤-0.705; Wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, d6 is the center thickness of the sixth lens on the optical axis, TTL is the total optical length of the optical lens, Vd2 is the Abbe number of the second lens, Vd3 is the Abbe number of the third lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side surface of the first lens, d56 is the axial distance from the second side surface of the fifth lens to the first side surface of the sixth lens, FOV is the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, and F1 is the total effective focal length of the second ... third lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, d6 is the center thickness of the sixth lens on the optical axis, TTL is the total optical length of the optical lens, TTL is the total optical length of the optical lens, TTL is the total optical length of the optical lens, T The effective focal length of the first lens is given by: ENPD is the entrance pupil diameter of the optical lens; F45 is the combined focal length of the fourth and fifth lenses; R4 is the radius of curvature of the second side surface of the second lens; F4 is the effective focal length of the fourth lens; F5 is the effective focal length of the fifth lens; R3 is the radius of curvature of the first side surface of the second lens; d2 is the center thickness of the second lens on the optical axis; R2 is the radius of curvature of the second side surface of the first lens; d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens; BFL is the optical back focal length of the optical lens; and d23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens.

17. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 16; 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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