Optical lens and related device

Abstract

An optical lens and a related device are applied to the technical field of optical imaging. The optical lens comprises at least seven lenses which are sequentially and coaxially arranged from an object side to an image side, the at least seven lenses comprise at least four lenses with positive focal power and at least three lenses with negative focal power, and the at least seven lenses at least comprise two meniscus lenses, two biconcave lenses and three biconvex lenses. According to the optical lens, an optical structure of at least seven lenses is adopted, through arrangement of the shapes of the at least seven lenses and reasonable distribution of focal power, the optical lens can be shared by a laser radar and a camera, and light rays are collected and stably transmitted to a light sensing surface of the laser radar and a light sensing surface of the camera for imaging; the high resolution performance of the optical lens is improved, so that the advantage that the optical lens can be combined with the point cloud data of the laser radar and the image data of the camera is utilized, and the intelligent driving perception precision is improved.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to an optical lens and related devices. Background Art

[0002] With the advancement of information technology and computer vision, detection technology has made rapid progress. A wide variety of detection devices have brought great convenience to people's lives and travel. Detection devices can be thought of as the "eyes" that perceive the environment. They include vision sensors such as cameras and radar sensors such as millimeter-wave radar, lidar, and ultrasonic radar. Among them, lidar (light detection and ranging) offers significant advantages in detection range, ranging accuracy, and reliability, and features near-24 / 7 operation. It is a key sensor in the perception field and plays a vital role in intelligent driving, intelligent transportation, surveying and mapping, and intelligent manufacturing. Cameras offer higher resolution and color perception capabilities, providing rich visual information and using image recognition technology to identify objects such as traffic signs, pedestrians, and vehicles.

[0003] Therefore, there is an urgent need for a feasible solution to combine the advantages of lidar point cloud data and camera image data to improve the perception accuracy of intelligent driving. Summary of the Invention

[0004] The embodiments of the present application provide an optical lens and related devices that can combine the advantages of laser radar point cloud data and camera image data to improve the perception accuracy of intelligent driving.

[0005] In a first aspect, an embodiment of the present application provides an optical lens, comprising: at least seven lenses coaxially arranged in sequence from the object side to the image side, the at least seven lenses including at least four lenses with positive optical focal length and at least three lenses with negative optical focal length, and the at least seven lenses including at least two meniscus lenses, two biconcave lenses, and three biconvex lenses.

[0006] In an embodiment of the present application, an optical lens is provided, which adopts an optical architecture of at least seven lenses. By setting the shapes of the at least seven lenses and the reasonable distribution of optical focal length, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens, and taking advantage of the fact that the optical lens can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0007] In one possible embodiment, the at least seven lenses include: 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. The first, fourth, fifth, seventh, and eighth lenses have positive focal power, while the second, third, and sixth lenses have negative focal power. The first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens.

[0008] In this embodiment, the first lens in the optical lens is a meniscus lens with positive focal length, which can collect light within the field of view as much as possible, allowing more light to enter the rear optical system, which is beneficial to increasing the back focus, and is beneficial to reducing the lens diameter of the second lens, ensuring the installability of the lens in the optical lens. The second lens in the optical lens is a meniscus lens with negative focal length, which is beneficial to smoothly transition the light collected by the first lens to the third lens, and can ensure the sensitivity of the optical lens tolerance. The third lens in the optical lens is a biconcave lens with negative focal length, and the fourth lens in the optical lens is a biconvex lens with positive focal length. Through the combined design of the third lens and the fourth lens, light of different wavelengths can be converged at the same point as much as possible after passing through the third lens and the fourth lens, thereby achieving the purpose of correcting chromatic aberration. The fifth lens in the optical lens is a meniscus lens with positive focal length, which can accurately control light of different field angles, correct optical distortion, and match the distortion of the transmitting lens, which can ensure the light receiving efficiency at a large angle and improve the imaging quality of the optical lens. The sixth lens in the optical lens is a biconcave lens with negative optical power, and the seventh lens in the optical lens is a biconvex lens with positive optical power. Through the combined design of the sixth lens and the seventh lens, light of different wavelengths can be converged on the same point as much as possible after passing through the sixth lens and the seventh lens, thereby achieving the purpose of further correcting chromatic aberration and the tolerance sensitivity of the optical lens. The eighth lens in the optical lens is a biconvex lens with positive optical power, which can improve the resolution performance of the optical lens. The embodiment of the present application adopts an optical architecture of eight lenses. By setting the shapes of the eight lenses and the reasonable distribution of optical power, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high resolution performance of the optical lens, thereby taking advantage of the fact that the optical lens can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0009] Optionally, the first lens and the second lens can be combined into a meniscus lens, which can collect as much light as possible in the field of view, allowing more light to enter the rear optical system, and facilitate the smooth transition of the collected light to the next lens, thereby ensuring the sensitivity of the optical lens tolerance.

[0010] In one possible embodiment, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave. The object-side surface of the second lens is convex, and the image-side surface of the second lens is concave. The object-side surface of the third lens is concave, and the image-side surface of the third lens is concave. The object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex. The object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex. The object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave. The object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex. The object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is convex.

[0011] In this embodiment, the object side surface of the first lens is convex and the image side surface is concave. By setting the first lens to a meniscus-shaped lens with a convex surface facing the object side and a positive optical power, the light in the field of view can be collected as much as possible, so that more light enters the rear optical system, which is conducive to increasing the back focus and reducing the lens aperture of the second lens, thereby ensuring the mountability of the lens in the optical lens. The object side surface of the second lens is convex and the image side surface is concave. By setting the second lens to a meniscus-shaped lens with a convex surface facing the object side and a negative optical power, the light collected by the first lens can be smoothly transferred to the third lens, and the sensitivity of the optical lens tolerance can be ensured. The object side surface of the third lens is concave and the image side surface is concave. The object side surface of the fourth lens is convex and the image side surface is convex. By setting the third lens to a biconcave lens with a negative optical power and the fourth lens to a biconvex lens with a positive optical power, light of different wavelengths can be converged at the same point as much as possible after passing through the third and fourth lenses, thereby achieving the purpose of correcting chromatic aberration. The object side surface of the fifth lens is concave, and the image side surface is convex. By setting the fifth lens as a meniscus-shaped positive optical power lens with the convex surface facing the image side, it is possible to precisely control light at different field angles, correct optical distortion, and match the distortion of the transmitting lens, thereby ensuring light reception efficiency at large angles and improving the imaging quality of the optical lens. The object side surface of the sixth lens is concave, and the image side surface is concave. The object side surface of the seventh lens is convex, and the image side surface is convex. By setting the sixth lens as a biconcave lens with negative optical power and the seventh lens as a biconvex lens with positive optical power, light of different wavelengths can be converged to the same point as much as possible after passing through the sixth and seventh lenses, thereby achieving the purpose of further correcting chromatic aberration and the tolerance sensitivity of the optical lens. The object side surface of the eighth lens is convex, and the image side surface is convex. By setting the eighth lens as a biconvex lens with positive optical power, the resolution performance of the optical lens can be improved.

[0012] In a possible implementation, the first lens, the second lens, the third lens, the fourth lens, the sixth lens, and the seventh lens are spherical lenses, and the fifth lens and the eighth lens are aspherical lenses.

[0013] In this embodiment, the first, second, third, fourth, sixth, and seventh lenses are spherical lenses, which can improve light transmission performance and optimize aberrations. The fifth and eighth lenses are aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have a better curvature radius characteristic, greater degrees of freedom, and the advantages of improving distortion and astigmatism. The use of aspherical lenses in the fifth and eighth lenses can better converge light and minimize aberrations that occur during imaging, thereby improving the imaging quality of the optical lens.

[0014] In a possible implementation, the third lens and the fourth lens are coupled to each other.

[0015] In this embodiment, the third lens and the fourth lens are coupled to each other, and specifically can be a glued design. Through the combined design of the third lens and the fourth lens, light of different wavelengths can be converged on the same point as much as possible after passing through the third lens and the fourth lens, thereby achieving the purpose of correcting chromatic aberration.

[0016] In a possible implementation, the third lens and the fourth lens are made of different materials.

[0017] In this embodiment, the third lens and the fourth lens are made of different materials, and different materials have different refractive properties for light of different wavelengths. This allows light of different wavelengths to converge on the same point as much as possible after passing through the third lens and the fourth lens, thereby achieving the purpose of correcting chromatic aberration.

[0018] In a possible implementation, the sixth lens and the seventh lens are coupled to each other.

[0019] In this embodiment, the sixth lens and the seventh lens are coupled to each other, and specifically can be a glued design. Through the combined design of the sixth lens and the seventh lens, light of different wavelengths can be converged on the same point as much as possible after passing through the sixth lens and the seventh lens, thereby achieving the purpose of correcting chromatic aberration.

[0020] In a possible implementation, the sixth lens and the seventh lens are made of different materials.

[0021] In this embodiment, the sixth lens and the seventh lens are made of different materials. Different materials have different refractive properties for light of different wavelengths. This allows light of different wavelengths to converge as closely as possible to the same point after passing through the sixth lens and the seventh lens, thereby achieving the purpose of correcting chromatic aberration.

[0022] In a possible implementation, the material of the seventh lens includes a first material, and the first material is used to suppress thermalization of the seventh lens.

[0023] In this embodiment, the seventh lens is made of the first material, such as material model H-ZPK1A, which is used to suppress thermalization of the seventh lens and ensure the light transmission performance and high resolution performance of the optical lens.

[0024] Optionally, the first material includes but is not limited to low expansion coefficient glass material, optical plastic, special composite material, etc., and the embodiment of the present application does not impose any limitation on this.

[0025] In a possible implementation, the material of the eighth lens includes a second material, and the second material is used to suppress thermalization of the eighth lens.

[0026] In this embodiment, the eighth lens is made of the second material, such as material D-FK61, which is used to suppress thermalization of the eighth lens and ensure the light transmission performance and high resolution performance of the optical lens.

[0027] Optionally, the second material includes but is not limited to low expansion coefficient glass material, optical plastic, special composite material, etc., and the embodiment of the present application does not impose any limitation on this.

[0028] In one possible embodiment, the object-side surface of the first lens satisfies the following relationship: 0.2≤R1 / T≤0.36, where R1 is the radius of curvature of the object-side surface of the first lens, and T is the distance from the center of the object-side surface of the first lens to the imaging plane of the optical lens on the optical axis.

[0029] In one possible embodiment, the focal length of the second lens element satisfies the following relationship: -0.24≤f2 / T≤-0.1, where f2 is the focal length of the second lens element, and T is the distance from the center of the object-side surface of the first lens element to the imaging surface of the optical lens element on the optical axis.

[0030] In a possible implementation, the Abbe coefficients of the third lens and the fourth lens satisfy the following relationship: 1.5≤vd3 / vd4≤3, where vd3 is the Abbe coefficient of the third lens, and vd4 is the Abbe coefficient of the fourth lens.

[0031] In one possible implementation, the object-side surface and the image-side surface of the fifth lens element satisfy the following relationship: 0.15≤R8 / R9≤0.6, where R8 is the radius of curvature of the object-side surface of the fifth lens element, and R9 is the radius of curvature of the image-side surface of the fifth lens element.

[0032] In a possible implementation, the Abbe coefficients of the sixth lens and the seventh lens satisfy the following relationship: 0.2≤vd6 / vd7≤0.7, where vd6 is the Abbe coefficient of the sixth lens and vd7 is the Abbe coefficient of the seventh lens.

[0033] In one possible implementation, the object-side surface and the image-side surface of the eighth lens element satisfy the following relationship: -1.5≤R13 / R14≤-0.9, where R13 is the radius of curvature of the object-side surface of the eighth lens element, and R14 is the radius of curvature of the image-side surface of the eighth lens element.

[0034] In a second aspect, embodiments of the present application provide an optical lens comprising: a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group, arranged coaxially from the object side to the image side. The first lens group is configured to collect light in the object space and transmit the light to the second lens group. The second lens group is configured to refract light to correct chromatic aberration. The third lens group is configured to refract light to correct optical distortion. The fourth lens group is configured to refract light to further correct chromatic aberration. The fifth lens group is configured to suppress thermalization during light transmission.

[0035] In an embodiment of the present application, an optical lens is provided, which adopts an optical architecture of five groups of lenses. By setting the optical characteristics of the five groups of lenses, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens. The advantage of the optical lens in combining the point cloud data of the laser radar and the image data of the camera can be utilized to improve the perception accuracy of intelligent driving.

[0036] In one possible embodiment, the first lens group includes a first lens and a second lens, the second lens group includes a third lens and a fourth lens, the third lens group includes a fifth lens, the fourth lens group includes a sixth lens and a seventh lens, and the fifth lens group includes an eighth lens. The first lens, the fourth lens, the fifth lens, the seventh lens, and the eighth lens have positive focal power, and the second lens, the third lens, and the sixth lens have negative focal power. The first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens. Alternatively, the first lens group includes a ninth lens, the second lens group includes a third lens and a fourth lens, the third lens group includes a fifth lens, the fourth lens group includes a sixth lens and a seventh lens, and the fifth lens group includes an eighth lens. The fourth lens, the fifth lens, the seventh lens, and the eighth lens have positive focal power, and the ninth lens, the third lens, and the sixth lens have negative focal power. The ninth lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens.

[0037] In this embodiment, the first lens in the first lens group is a meniscus lens with positive focal length, which can collect as much light as possible within the field of view, allowing more light to enter the rear optical system, thereby increasing the back focus and reducing the lens diameter of the second lens, ensuring the installability of the lenses in the optical lens. The second lens in the first lens group is a meniscus lens with negative focal length, which can facilitate the smooth transition of light collected by the first lens to the third lens and ensure the sensitivity of the optical lens tolerance. Alternatively, the first lens and the second lens can be combined into a meniscus lens with negative focal length, so that the first lens group only needs to include a ninth lens to collect light within the field of view and smoothly transition the collected light to the next lens. The third lens in the second lens group is a biconcave lens with negative focal length, and the fourth lens in the second lens group is a biconvex lens with positive focal length. Through the combined design of the third and fourth lenses, light of different wavelengths can be converged to the same point as much as possible after passing through the third and fourth lenses, thereby achieving the purpose of correcting chromatic aberration. The fifth lens in the third lens group is a positive meniscus lens that precisely controls light at varying field angles, corrects optical distortion, and matches the distortion of the transmitting lens, ensuring light reception efficiency at wide angles and improving imaging quality. The sixth lens in the fourth lens group is a negative-power biconcave lens, while the seventh lens in the fourth lens group is a positive-power biconvex lens. The combined design of the sixth and seventh lenses ensures that light of different wavelengths converges as closely as possible to the same point after passing through the sixth and seventh lenses, further correcting chromatic aberration and improving the tolerance sensitivity of the optical lens. The eighth lens in the fifth lens group is a positive-power biconvex lens that improves the resolution of the optical lens.

[0038] In one possible embodiment, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave. The object-side surface of the second lens is convex, and the image-side surface of the second lens is concave. The object-side surface of the third lens is concave, and the image-side surface of the third lens is concave. The object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex. The object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex. The object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave. The object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex. The object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is convex.

[0039] In a possible implementation, the first lens, the second lens, the third lens, the fourth lens, the sixth lens, and the seventh lens are spherical lenses, and the fifth lens and the eighth lens are aspherical lenses.

[0040] In a possible implementation, the third lens and the fourth lens are coupled to each other.

[0041] In a possible implementation, the third lens and the fourth lens are made of different materials.

[0042] In a possible implementation, the sixth lens and the seventh lens are coupled to each other.

[0043] In a possible implementation, the sixth lens and the seventh lens are made of different materials.

[0044] In a possible implementation, the material of the seventh lens includes a first material, and the first material is used to suppress thermalization of the seventh lens.

[0045] In a possible implementation, the material of the eighth lens includes a second material, and the second material is used to suppress thermalization of the eighth lens.

[0046] In one possible embodiment, the object-side surface of the first lens satisfies the following relationship: 0.2≤R1 / T≤0.36, where R1 is the radius of curvature of the object-side surface of the first lens, and T is the distance from the center of the object-side surface of the first lens to the imaging plane of the optical lens on the optical axis.

[0047] In one possible embodiment, the focal length of the second lens element satisfies the following relationship: -0.24≤f2 / T≤-0.1, where f2 is the focal length of the second lens element, and T is the distance from the center of the object-side surface of the first lens element to the imaging surface of the optical lens element on the optical axis.

[0048] In a possible implementation, the Abbe coefficients of the third lens and the fourth lens satisfy the following relationship: 1.5≤vd3 / vd4≤3, where vd3 is the Abbe coefficient of the third lens, and vd4 is the Abbe coefficient of the fourth lens.

[0049] In one possible implementation, the object-side surface and the image-side surface of the fifth lens element satisfy the following relationship: 0.15≤R8 / R9≤0.6, where R8 is the radius of curvature of the object-side surface of the fifth lens element, and R9 is the radius of curvature of the image-side surface of the fifth lens element.

[0050] In a possible implementation, the Abbe coefficients of the sixth lens and the seventh lens satisfy the following relationship: 0.2≤vd6 / vd7≤0.7, where vd6 is the Abbe coefficient of the sixth lens and vd7 is the Abbe coefficient of the seventh lens.

[0051] In one possible implementation, the object-side surface and the image-side surface of the eighth lens element satisfy the following relationship: -1.5≤R13 / R14≤-0.9, where R13 is the radius of curvature of the object-side surface of the eighth lens element, and R14 is the radius of curvature of the image-side surface of the eighth lens element.

[0052] Regarding the optical lens described in the second aspect and any possible implementation, its optical characteristics can refer to the first aspect and the corresponding implementation.

[0053] Regarding the technical effects brought about by the second aspect and any possible implementation method, reference may be made to the introduction of the technical effects corresponding to the first aspect and the corresponding implementation method.

[0054] In a third aspect, an embodiment of the present application provides an optical imaging device, which includes a spectroscopic component and the optical lens described in any one of the first to second aspects and any possible implementation manner.

[0055] The optical lens and the beam splitter assembly are coaxially arranged in sequence from the object side to the image side. The beam splitter assembly is used to receive the light from the optical lens and split the light from the optical lens for transmission.

[0056] In an embodiment of the present application, an optical imaging device is provided. The optical imaging device adopts an optical architecture in which a spectroscopic component is placed behind an optical lens. By setting the optical characteristics of the optical lens, the laser radar and the camera can share the optical lens and the spectroscopic component. The spectroscopic component transmits the light from the optical lens to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging. The optical imaging device can take advantage of the combination of the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0057] In a possible implementation, the light splitting component includes a prism formed by splicing a first prism and a second prism, and a splicing surface of the first prism and the second prism forms a first angle with the optical axis of the optical lens.

[0058] In this embodiment, the spectroscopic component is coaxially arranged with the optical lens, and the splicing surface of the first prism and the second prism in the spectroscopic component forms a first angle with the optical axis of the optical lens, so that after the light from the optical lens is transmitted to the splicing surface of the first prism and the second prism in the spectroscopic component, a turning light path and a straight light path are formed, thereby achieving the purpose of spectroscopic transmission.

[0059] In one possible embodiment, the optical imaging device further includes a first sensor and a second sensor, wherein the first sensor and the second sensor are respectively disposed on a light splitting path of a light splitting component, and the light splitting component is used to split the light from the optical lens and transmit it to the first sensor and the second sensor.

[0060] In this embodiment, different sensors can be respectively arranged on the turning light path and the straight light path of the spectroscopic component, so that different sensors share the optical lens and the spectroscopic component. The spectroscopic component transmits the light from the optical lens to different sensors for imaging, so that the optical imaging device can combine the perception advantages of different sensors to improve the perception accuracy of intelligent driving.

[0061] In a possible implementation, the first sensor includes an infrared light sensor, and the second sensor includes a visible light sensor.

[0062] In this embodiment, the first sensor includes an infrared light sensor, such as a lidar, and the second sensor includes a visible light sensor, such as a camera. This embodiment combines the advantages of lidar point cloud data and camera image data to improve the accuracy of intelligent driving perception.

[0063] In one possible implementation, the first sensor includes a lidar sensor, and the second sensor includes an image sensor.

[0064] In a possible implementation, the first sensor is disposed on a deflecting optical path of the light splitting component, and the second sensor is disposed on a straight optical path of the light splitting component.

[0065] In this embodiment, since the defocus amount of the turning light path of the spectroscopic component is greatly affected by the movement of the spectroscopic component, a first sensor (infrared light sensor) with a larger depth of field (DOF) can be set on the turning light path of the spectroscopic component, and the defocus amount of the straight light path of the spectroscopic component is less affected by the movement of the spectroscopic component, so a second sensor (visible light sensor) with a smaller DOF can be set on the straight light path of the spectroscopic component, thereby achieving high-quality imaging of the first sensor and the second sensor.

[0066] In a possible implementation, the first sensor is offset from the center of the light splitting component by a first distance.

[0067] In this embodiment, by displacing the first sensor from the center of the light splitting component by a first distance, the field of view (FOV) of the first sensor can be changed, thereby enabling the first sensor to detect the sky or the ground.

[0068] In a possible implementation, the field of view angle of the optical lens is greater than or equal to the larger field of view angle of the first sensor and the second sensor.

[0069] In this embodiment, since the FOVs of the first sensor and the second sensor are different and the first sensor and the second sensor share an optical lens, in order to match sensors with different FOVs, the field of view angle of a single optical lens is designed according to the sensor with a larger FOV, and can be backward compatible with sensors with a smaller FOV, thereby achieving a ratio of different FOVs of the first sensor and the second sensor.

[0070] In a fourth aspect, embodiments of the present application provide a sensing device, comprising at least one optical lens as described in the first aspect, or the optical lens as described in the second aspect, or the optical imaging device as described in the third aspect. Furthermore, the sensing device includes a housing, and the optical lens or the optical imaging device is housed within the housing.

[0071] Optionally, the perception device includes a sensor that uses light to perceive the environment, such as one or more of a laser radar, a camera, or a fusion perception device, etc. The fusion perception device fuses at least two types of sensors among the laser radar, camera, radar, etc.

[0072] In a fifth aspect, an embodiment of the present application provides a terminal comprising at least one optical lens as described in the first aspect, or the optical lens as described in the second aspect, or the optical imaging device as described in the third aspect, or the sensing device as described in the fourth aspect.

[0073] Optionally, the terminal may be a means of transportation, such as a car, truck, aircraft, drone, slow transport vehicle, spacecraft, or ship, etc., which may be used in any possible scenario, and the embodiments of the present application do not impose any restrictions on this.

[0074] Optionally, the terminal is a vehicle, a drone or a robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0076] Figure 1A A schematic diagram of an application scenario of a radar provided in an embodiment of the present application;

[0077] Figure 1B A schematic diagram of an application scenario of a radar provided in an embodiment of the present application;

[0078] Figure 2 A schematic diagram of the architecture of a radar provided in an embodiment of the present application;

[0079] Figure 3 A schematic diagram of a light splitting architecture provided in an embodiment of the present application;

[0080] Figure 4 A schematic structural diagram of an optical lens provided in an embodiment of the present application;

[0081] Figure 5 A schematic structural diagram of another optical lens provided in an embodiment of the present application;

[0082] Figure 6 A schematic diagram of a light path provided in an embodiment of the present application;

[0083] Figure 7 A schematic structural diagram of an optical imaging device provided in an embodiment of the present application;

[0084] Figure 8 A schematic diagram of a light path provided in an embodiment of the present application;

[0085] Figure 9 A schematic diagram of a FOV provided in an embodiment of the present application;

[0086] Figure 10 A schematic diagram of another FOV provided in an embodiment of the present application;

[0087] Figure 11 A schematic diagram of a sensing device provided in an embodiment of the present application;

[0088] Figure 12 A schematic diagram of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solutions and advantages of this application clearer, the embodiments of this application will be described below in conjunction with the drawings in the embodiments of this application.

[0090] The terms "first" and "second" in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to the process, method, product, or device.

[0091] The “embodiment” mentioned herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that in the various embodiments of the present application, unless otherwise specified and there is a logical conflict, the terms and / or descriptions between the various embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment according to their inherent logical relationship.

[0092] It should be understood that in the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0093] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0094] In order to more clearly describe the solution of this application, some possible application scenarios of lidar are introduced below.

[0095] See also Figure 1A and Figure 1B , Figure 1A and Figure 1B Schematic diagram of application scenarios of the radar provided in an embodiment of the present application.

[0096] like Figure 1A and Figure 1B As shown, this exemplary application scenario takes the laser radar installed on a vehicle as an example.

[0097] Vehicles can be, for example, autonomous vehicles, smart vehicles, electric vehicles, or digital vehicles. LiDAR can be deployed at various locations on the vehicle (see Figure 1B For example, LiDAR can be deployed in any one or more of the four directions of the vehicle, namely, front, rear, left, and right, to capture information about the vehicle's surroundings. Figure 1A For example, the laser radar is deployed in front of the vehicle. The laser radar can sense Figure 1A The fan-shaped area shown in the dotted box can be called the detection area of the laser radar (or the field of view of the laser radar).

[0098] In one possible implementation, a lidar can acquire the vehicle's latitude and longitude, speed, and orientation, or related information (e.g., target distance, target speed, target pose, or grayscale image) of targets within a certain range (e.g., other nearby vehicles) in real time or periodically. The lidar or the vehicle can determine the vehicle's position and / or plan a path based on this information. For example, the vehicle's longitude and latitude can be used to determine the vehicle's location, its speed and orientation can be used to determine its future travel direction and destination, or the distances to surrounding objects can be used to determine the number and density of obstacles around the vehicle. Furthermore, it can optionally be combined with advanced driving assistance systems (ADAS) to enable assisted or autonomous driving. It should be understood that the principle by which lidar detects target related information is that the lidar emits detection light in a certain direction. If a target is within the lidar's detection area, the target reflects the received detection light back to the lidar (the reflected detection light is referred to as an echo signal). The lidar then determines the target's related information based on the echo signal.

[0099] It should be noted that the above application scenarios are merely examples. The laser radar provided in this application (including the optical waveguide assembly provided in this application) can also be applied in a variety of other possible scenarios, not limited to the scenarios exemplified above. For example, the laser radar can also be installed on a drone as an airborne radar. For another example, the laser radar can also be installed on a roadside unit (RSU) as a roadside traffic laser radar, enabling intelligent vehicle-road collaborative communication. For another example, the laser radar can be installed on an automated guided vehicle (AGV), where an AGV is a transport vehicle equipped with an electromagnetic or optical automatic navigation device that can travel along a specified navigation path and has safety protection and various transfer functions. A full list of these is omitted here. It should be understood that the application scenarios described in this application are intended to more clearly illustrate the technical solutions of this application and do not constitute a limitation of the technical solutions provided in this application. Persons skilled in the art will recognize that as new application scenarios emerge, the technical solutions provided in this application will also be applicable to similar technical problems.

[0100] Based on the above content, the above application scenarios can be applied to unmanned driving, automatic driving, assisted driving, intelligent driving, connected vehicles, security detection, remote interaction, surveying and mapping or artificial intelligence and other fields.

[0101] The following combination Figure 2 , introduce some related concepts of lidar.

[0102] Laser radar, also known as optical radar, is the abbreviation of light detection and ranging system, and can also be called Laser Radar or LADAR (laser detection and ranging).

[0103] LiDAR uses light as a detection medium, utilizing the emission and reception of lasers to detect targets, for example, to measure distance, velocity, or azimuth. LiDAR can measure distance to a target based on the laser's time of flight, which is the time difference between the laser's transmission and reception. Alternatively, it can measure distance to a target based on the phase difference between the transmitted laser signal and the received echo of the same laser signal. LiDAR's greatest advantage lies in its ability to create clear three-dimensional (3D) images of targets using Doppler imaging technology. LiDAR uses the emission and reception of lasers to collect information such as the 3D coordinates, reflectivity, and texture of a large number of densely packed points on the target's surface. Based on this collected information, LiDAR creates a 3D model of the target, builds a 3D point cloud, and creates an environmental map to achieve environmental awareness. Compared with traditional passive imaging technologies such as visible light and infrared, lidar imaging technology has subverted the traditional two-dimensional projection imaging mode. It can collect depth information of the target surface and obtain relatively complete spatial information of the target. After data processing, it reconstructs the three-dimensional surface of the target to obtain a three-dimensional graphic that better reflects the geometric shape of the target. At the same time, it can also obtain rich feature information such as the reflection characteristics and movement speed of the target surface, providing sufficient information support for data processing such as target detection, identification, and tracking, and reducing the difficulty of the algorithm.

[0104] See also Figure 2 , Figure 2 A schematic diagram of the architecture of a radar provided in an embodiment of the present application.

[0105] like Figure 2 As shown, the laser radar mainly includes a laser emitting part (or system) 100, a laser receiving part (or system) 200 and a signal processing part (or system) 300.

[0106] Among them, the laser emitting part 100 includes an excitation source (or laser driver), a laser, and an emitting optical system. The excitation source drives the laser to emit a laser beam (or laser pulse), and the laser beam (or laser pulse) is emitted outward through the emitting optical system. The laser receiving part 200 includes a receiving optical system and a detector. When the laser beam emitted from the laser radar encounters the target object, it interacts with the target object to form a reflected / scattered echo beam. The echo beam is collected by the receiving optical system and received by the detector. The optical signal is converted into an electrical signal, and the electrical signal is passed to the signal processing part 300 after being processed by the analog front end. The signal processing part 300 processes the received signal to obtain information such as the distance, speed, azimuth, etc. of the target object. In addition, information such as the surface morphology and physical properties of the target can be obtained to establish an object model. The detector is typically a photodetector, which converts the received light signal into an electrical signal. This electrical signal is typically an analog signal. The signal processing unit 300 is typically used to process digital signals, such as a digital signal processor (DSP). Therefore, the analog electrical signal is converted into a digital signal via an analog-to-digital converter (ADC) and provided to the signal processing unit 300. The electrical signal can also be amplified and then converted into a digital signal via an analog-to-digital converter before being provided to the signal processing unit 300. The signal processing unit 300 includes signal processing circuitry for processing the digital signal to obtain information such as the distance, speed, and azimuth of the target object and further establish an object model. The lidar also includes control circuitry, such as a control unit for controlling the excitation source and a control unit for controlling the scan drive circuit. These two control units can be integrated or independent. Furthermore, the signal processing circuit and the control circuit can be integrated or independent.

[0107] In addition, in one implementation, the laser emitting part 100 may also include a laser modulator and a beam controller. The laser beam emitted by the laser passes through the beam controller. Under the control of the laser modulator, the beam controller controls the direction and number of lines of the emitted laser beam. The laser beam emitted from the beam controller passes through the emitting optical system and is emitted outward.

[0108] The laser radar system may also include a scanning unit (or system) 400. The laser beam emitted by the laser is scanned across a plane by the scanning unit 400 to generate real-time planar image information. The scanning unit 400 primarily comprises a scanning mechanism and a scanning drive circuit. The scanning drive circuit is used to drive the scanning mechanism, which transforms the laser beam from a "line" to a "plane" under the action of the scanning mechanism.

[0109] As mentioned in the background technology section, there is an urgent need for a feasible solution to combine the advantages of lidar point cloud data and camera image data to improve the accuracy of intelligent driving perception.

[0110] See also Figure 3 , Figure 3 A schematic diagram of a light splitting architecture provided in an embodiment of the present application.

[0111] like Figure 3 As shown, the spectroscopic architecture includes but is not limited to: a light source, a transmitting lens, a spectroscopic prism, a first receiving lens, a first sensor, a second receiving lens, and a second sensor.

[0112] Among them, the infrared signal light emitted by the light source is collimated and uniformed by the transmitting lens and then emitted into the object space. The signal light and ambient light (visible light) from the object space are incident on the beam splitter (BS) and divided into a transmission path and a turning path. The ambient light is transmitted and then converged by the second receiving lens to the photosensitive surface of the second sensor (such as a camera); the signal light is reflected by the BS and then converged by the first receiving lens to the photosensitive surface of the first sensor (such as Lidar).

[0113] The design of the spectroscopic architecture with the spectroscopic prism placed in front of the receiving lens is relatively easy, and the size of the dual lenses of the first receiving lens and the second receiving lens can be made smaller. However, on the one hand, since the transmitting lens must ensure sufficient emission efficiency, the transmitting lens has a large aperture. Therefore, the height of the entire machine is limited by the aperture of the transmitting lens. On the other hand, since the first sensor (such as Lidar) and the second sensor (such as a camera) do not share a receiving lens, there may be distortion mismatch between the different FOVs of the two. At the same time, the distortion mismatch of the two receiving lenses at high and low temperatures will also lead to an increase in the pixel-level alignment deviation of the first sensor (such as Lidar) and the second sensor (such as a camera), which in turn leads to lower intelligent driving perception accuracy.

[0114] In view of this, the embodiments of the present application provide an optical lens and related devices, which are applied to the field of optical imaging technology, such as optical imaging of lidar and cameras, and can combine the advantages of lidar point cloud data and camera image data to improve the perception accuracy of intelligent driving.

[0115] The optical lens and related devices provided in this application will be described below with reference to the accompanying drawings.

[0116] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of an optical lens provided in an embodiment of the present application. The optical lens is used in the field of optical imaging technology, such as optical imaging of laser radar and cameras.

[0117] like Figure 4As shown, the optical lens includes:

[0118] At least seven lenses are coaxially arranged in sequence from the object side to the image side.

[0119] The at least seven lenses include at least four lenses with positive optical power and at least three lenses with negative optical power.

[0120] The at least seven lenses include at least two meniscus lenses, two biconcave lenses, and three biconvex lenses.

[0121] It can be understood that the optical lens in the embodiment of the present application adopts an optical architecture of at least seven lenses. By setting the shapes of the at least seven lenses and the reasonable distribution of optical focal length, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens, and taking advantage of the fact that the optical lens can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0122] In a possible embodiment, the at least seven lenses include:

[0123] First lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7 and eighth lens L8.

[0124] Among them, the first lens L1, the fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8 have positive refractive power, and the second lens L2, the third lens L3, and the sixth lens L6 have negative refractive power.

[0125] The first lens L1 is a meniscus lens, the second lens L2 is a meniscus lens, the third lens L3 is a biconcave lens, the fourth lens L4 is a biconvex lens, the fifth lens L5 is a meniscus lens, the sixth lens L6 is a biconcave lens, the seventh lens L7 is a biconvex lens, and the eighth lens L8 is a biconvex lens.

[0126] It can be understood that the first lens L1 in the optical lens can be a meniscus lens with positive optical power, which can collect light in the field of view as much as possible, allowing more light to enter the rear optical system, which is beneficial to increasing the back focus and reducing the lens aperture of the second lens L2, thereby ensuring the mountability of the lens in the optical lens.

[0127] The second lens L2 in the optical lens can be a meniscus lens with negative optical power, which is conducive to smoothly transitioning the light collected by the first lens L1 to the third lens L3 and can ensure the sensitivity of the optical lens tolerance.

[0128] The third lens L3 in the optical lens can be a biconcave lens with negative optical power, and the fourth lens L4 in the optical lens can be a biconvex lens with positive optical power. Through the combined design of the third lens L3 and the fourth lens L4, light of different wavelengths can be converged on the same point as much as possible after passing through the third lens L3 and the fourth lens L4, thereby achieving the purpose of correcting chromatic aberration.

[0129] The fifth lens L5 in this optical lens can be a meniscus lens with positive optical power, which can accurately control light at different field angles, correct optical distortion, and match the distortion of the transmitting lens, thereby ensuring the light receiving efficiency at a large angle and improving the imaging quality of the optical lens.

[0130] The sixth lens L6 in the optical lens can be a biconcave lens with negative optical power, and the seventh lens L7 in the optical lens can be a biconvex lens with positive optical power. Through the combined design of the sixth lens L6 and the seventh lens L7, light of different wavelengths can be converged on the same point as much as possible after passing through the sixth lens L6 and the seventh lens L7, thereby achieving the purpose of further correcting chromatic aberration and the tolerance sensitivity of the optical lens.

[0131] The eighth lens L8 in the optical lens can be a biconvex lens with positive optical power, which can improve the resolution performance of the optical lens.

[0132] Optionally, the first lens L1 and the second lens L2 can be combined into a meniscus lens, which can collect as much light as possible in the field of view, allowing more light to enter the rear optical system, and facilitate the smooth transition of the collected light to the next lens, thereby ensuring the sensitivity of the optical lens tolerance.

[0133] The embodiment of the present application adopts an optical architecture with eight lenses (L1, L2, L3, L4, L5, L6, L7, L8). By setting the shapes of the eight lenses and reasonably distributing the optical focal length, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens. The advantage of the optical lens is that it can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0134] In a possible embodiment, the object-side surface S1 of the first lens L1 is convex, and the image-side surface S2 of the first lens L1 is concave.

[0135] Through the embodiment of the present application, the first lens L1 is set to be a meniscus-shaped positive optical power lens with the convex surface facing the object side. This can collect as much light as possible within the field of view, allowing more light to enter the rear optical system, which is beneficial to increasing the back focus and reducing the lens diameter of the second lens L2, thereby ensuring the mountability of the lens in the optical lens.

[0136] In a possible embodiment, the object-side surface S3 of the second lens L2 is convex, and the image-side surface S4 of the second lens L2 is concave.

[0137] According to the embodiment of the present application, the second lens L2 is set as a meniscus-shaped lens with negative optical power and a convex surface facing the object side. This can smoothly transition the light collected by the first lens L1 to the third lens L3 and ensure the sensitivity of the optical lens tolerance.

[0138] In a possible embodiment, the object-side surface S5 of the third lens L3 is concave, and the image-side surface S6 of the third lens L3 is concave. The object-side surface S6 of the fourth lens L4 is convex, and the image-side surface S7 of the fourth lens L4 is convex.

[0139] According to the embodiment of the present application, the third lens element L3 is configured as a biconcave lens with negative optical power, and the fourth lens element L4 is configured as a biconvex lens with positive optical power. This allows light of different wavelengths to converge as closely as possible on the same point after passing through the third lens element L3 and the fourth lens element L4, thereby achieving the purpose of correcting chromatic aberration.

[0140] In a possible embodiment, the object-side surface S8 of the fifth lens L5 is concave, and the image-side surface S9 of the fifth lens L5 is convex.

[0141] Through the embodiments of the present application, the fifth lens L5 is set to a meniscus-shaped positive optical power lens with the convex surface facing the image side, which can accurately control the light of different field angles, correct optical distortion, and match the distortion of the transmitting lens, thereby ensuring the light receiving efficiency at a large angle and improving the imaging quality of the optical lens.

[0142] In a possible embodiment, the object-side surface S10 of the sixth lens L6 is concave, and the image-side surface S11 of the sixth lens L6 is concave. The object-side surface S11 of the seventh lens L7 is convex, and the image-side surface S12 of the seventh lens L7 is convex.

[0143] According to the embodiment of the present application, the sixth lens element L6 is configured as a biconcave lens with negative optical power, and the seventh lens element L7 is configured as a biconvex lens with positive optical power. This allows light of different wavelengths to converge as closely as possible on the same point after passing through the sixth lens element L6 and the seventh lens element L7, thereby further correcting chromatic aberration and improving the tolerance sensitivity of the optical lens.

[0144] In a possible embodiment, the object-side surface S13 of the eighth lens L8 is a convex surface, and the image-side surface S14 of the eighth lens L8 is a convex surface.

[0145] According to the embodiment of the present application, the eighth lens L8 is set to be a biconvex lens with positive refractive power, which can improve the resolution performance of the optical lens.

[0146] Optionally, the optical lens may further include: a stop STO.

[0147] The aperture STO may be disposed between the fourth lens L4 and the fifth lens L5.

[0148] It is understood that the aperture STO can be used to adjust the intensity of light passing through to improve imaging quality. In addition, by placing the aperture STO before each lens, the size of the entire lens can be reduced, achieving miniaturization of the optical lens.

[0149] In a possible embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7 are spherical lenses.

[0150] According to the embodiments of the present application, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the sixth lens L6, and the seventh lens L7 are designed as spherical lenses, which can improve the light transmission performance and optimize aberrations.

[0151] In a possible embodiment, the fifth lens L5 and the eighth lens L8 are aspherical lenses.

[0152] Through the embodiments of the present application, the fifth lens L5 and the eighth lens L8 are designed as aspherical lenses. Aspherical lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have a better curvature radius and greater degrees of freedom, with the advantages of improving distortion and astigmatism. The use of aspherical lenses for the fifth lens L5 and the eighth lens L8 enhances light convergence and minimizes aberrations that occur during imaging, thereby improving the imaging quality of the optical lens.

[0153] In a possible embodiment, the third lens L3 and the fourth lens L4 are coupled to each other.

[0154] It can be understood that the third lens L3 and the fourth lens L4 are coupled to each other, and specifically can be a cemented design. Through the combined design of the third lens L3 and the fourth lens L4, light of different wavelengths can be converged on the same point as much as possible after passing through the third lens L3 and the fourth lens L4, thereby achieving the purpose of correcting chromatic aberration.

[0155] Optionally, the materials of the third lens L3 and the fourth lens L4 are different.

[0156] It can be understood that the third lens L3 and the fourth lens L4 are made of different materials, and different materials have different refractive properties for light of different wavelengths. This can enable light of different wavelengths to converge on the same point as much as possible after passing through the third lens L3 and the fourth lens L4, thereby achieving the purpose of correcting chromatic aberration.

[0157] In a possible embodiment, the sixth lens L6 and the seventh lens L7 are coupled to each other.

[0158] It can be understood that the sixth lens L6 and the seventh lens L7 are coupled to each other, and specifically can be a cemented design. Through the combined design of the sixth lens L6 and the seventh lens L7, light of different wavelengths can be converged to the same point as much as possible after passing through the sixth lens L6 and the seventh lens L7, thereby achieving the purpose of correcting chromatic aberration.

[0159] Optionally, the sixth lens L6 and the seventh lens L7 are made of different materials.

[0160] It can be understood that the sixth lens L6 and the seventh lens L7 are made of different materials, and different materials have different refractive properties for light of different wavelengths. This can enable light of different wavelengths to converge as much as possible on the same point after passing through the sixth lens L6 and the seventh lens L7, thereby achieving the purpose of correcting chromatic aberration.

[0161] In a possible embodiment, the material of the seventh lens L7 includes the first material.

[0162] The first material is used to suppress thermalization of the seventh lens L7.

[0163] Optionally, the first material includes but is not limited to low expansion coefficient glass material, optical plastic, special composite material, etc., and the embodiment of the present application does not impose any limitation on this.

[0164] It is understandable that the seventh lens L7 adopts the first material, such as the material with model H-ZPK1A, which is used to suppress the thermalization of the seventh lens L7, thereby ensuring the light transmission performance and high resolution performance of the optical lens.

[0165] In a possible embodiment, the material of the eighth lens L8 includes the second material.

[0166] The second material is used to suppress thermalization of the eighth lens L8.

[0167] Optionally, the second material includes but is not limited to low expansion coefficient glass material, optical plastic, special composite material, etc., and the embodiment of the present application does not impose any limitation on this.

[0168] It is understandable that the eighth lens L8 uses the second material, such as material with model D-FK61, to suppress the thermalization of the eighth lens L8, thereby ensuring the light transmission performance and high resolution performance of the optical lens.

[0169] Optionally, the object-side surface of the first lens L1 satisfies the following relationship:

[0170] 0.2≤R1 / T≤0.36.

[0171] Wherein, R1 is the curvature radius of the object-side surface of the first lens L1, and T is the distance from the center of the object-side surface of the first lens L1 to the imaging surface of the optical lens on the optical axis.

[0172] It can be understood that the first lens L1 meeting the above-mentioned focal length f1 can collect light within the field of view as much as possible, allowing more light to enter the rear optical system, which is beneficial to increasing the back focus and reducing the lens aperture of the second lens L2, ensuring the mountability of the lenses in the optical lens.

[0173] Optionally, the focal length of the second lens L2 satisfies the following relationship:

[0174] -0.24≤f2 / T≤-0.1.

[0175] Wherein, f2 is the focal length of the second lens L2, and T is the distance from the center of the object-side surface of the first lens L1 to the imaging surface of the optical lens on the optical axis.

[0176] It can be understood that the second lens L2 meeting the above-mentioned focal length f2 is conducive to smoothly transitioning the light collected by the first lens L1 to the third lens L3, and can ensure the sensitivity of the optical lens tolerance.

[0177] Optionally, the Abbe coefficients of the third lens L3 and the fourth lens L4 satisfy the following relationship:

[0178] 1.5≤vd3 / vd4≤3.

[0179] Wherein, vd3 is the Abbe coefficient of the third lens L3, and vd4 is the Abbe coefficient of the fourth lens L4.

[0180] It can be understood that the third lens L3 satisfying the above-mentioned Abbe coefficient vd3 and the fourth lens L4 satisfying the above-mentioned Abbe coefficient vd4 can make light of different wavelengths converge on the same point as much as possible after passing through the third lens L3 and the fourth lens L4, thereby achieving the purpose of correcting chromatic aberration.

[0181] Optionally, the object-side surface S8 and the image-side surface S9 of the fifth lens L5 satisfy the following relationship:

[0182] 0.15≤R8 / R9≤0.6.

[0183] Here, R8 is the curvature radius of the object-side surface S8 of the fifth lens L5, and R9 is the curvature radius of the image-side surface S9 of the fifth lens L5.

[0184] It can be understood that the fifth lens L5 that meets the above-mentioned curvature radii R8 and R9 can accurately control light at different field angles, correct optical distortion, and match the distortion of the transmitting lens, thereby ensuring the light receiving efficiency at a large angle and improving the imaging quality of the optical lens.

[0185] Optionally, the Abbe coefficients of the sixth lens L6 and the seventh lens L7 satisfy the following relationship:

[0186] 0.2≤vd6 / vd7≤0.7.

[0187] Here, vd6 is the Abbe coefficient of the sixth lens L6, and vd7 is the Abbe coefficient of the seventh lens L7.

[0188] It can be understood that the sixth lens L6 meeting the aforementioned Abbe coefficient vd6 and the seventh lens L7 meeting the aforementioned Abbe coefficient vd7 can enable light of different wavelengths to converge on the same point as much as possible after passing through the sixth lens L6 and the seventh lens L7, thereby achieving the purpose of further correcting chromatic aberration and optical lens tolerance sensitivity.

[0189] Optionally, the object-side surface S13 and the image-side surface S14 of the eighth lens L8 satisfy the following relationship:

[0190] -1.5≤R13 / R14≤-0.9.

[0191] Here, R13 is the curvature radius of the object-side surface S13 of the eighth lens L8, and R14 is the curvature radius of the image-side surface S14 of the eighth lens L8.

[0192] It can be understood that the eighth lens L8 meeting the above curvature radii R13 and R14 can improve the resolution performance of the optical lens.

[0193] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of another optical lens provided in an embodiment of the present application. This optical lens is used in the field of optical imaging technology, such as optical imaging of laser radar and cameras.

[0194] It is understandable that the optical lens in the embodiment of the present application can be regarded as the above-mentioned Figure 4Alternatively, it can be understood that the optical lens in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this.

[0195] like Figure 5 As shown, the optical lens includes:

[0196] The first lens group, second lens group, third lens group, fourth lens group, and fifth lens group are coaxially arranged in sequence from the object side to the image side.

[0197] The first lens group is used to collect light in the object space and transmit the light to the second lens group.

[0198] The second lens group is used to refract light to correct chromatic aberration.

[0199] The third mirror group is used to refract light to correct optical distortion.

[0200] The fourth lens group is used to refract light to further correct chromatic aberration.

[0201] The fifth mirror group is used to suppress the thermalization of light during transmission.

[0202] It can be understood that the optical lens in the embodiment of the present application adopts an optical architecture of five groups of lenses. By setting the optical characteristics of the five groups of lenses, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens, and thus taking advantage of the fact that the optical lens can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0203] In a possible embodiment, the first lens group includes a first lens L1 and a second lens L2, the second lens group includes a third lens L3 and a fourth lens L4, the third lens group includes a fifth lens L5, the fourth lens group includes a sixth lens L6 and a seventh lens L7, and the fifth lens group includes an eighth lens L8.

[0204] Among them, the first lens L1, the fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8 have positive refractive power, and the second lens L2, the third lens L3, and the sixth lens L6 have negative refractive power.

[0205] The first lens L1 is a meniscus lens, the second lens L2 is a meniscus lens, the third lens L3 is a biconcave lens, the fourth lens L4 is a biconvex lens, the fifth lens L5 is a meniscus lens, the sixth lens L6 is a biconcave lens, the seventh lens L7 is a biconvex lens, and the eighth lens L8 is a biconvex lens.

[0206] It can be understood that the first lens L1 in the first lens group can be a meniscus lens with positive optical power, which can collect light in the field of view as much as possible, allowing more light to enter the rear optical system, which is beneficial to increasing the back focus and reducing the lens aperture of the second lens L2, ensuring the mountability of the lenses in the optical lens.

[0207] The second lens L2 in the first lens group can be a meniscus lens with negative optical power, which is conducive to smoothly transitioning the light collected by the first lens L1 to the third lens L3 and can ensure the sensitivity of the optical lens tolerance.

[0208] The third lens L3 in the second lens group can be a biconcave lens with negative optical power, and the fourth lens L4 in the second lens group can be a biconvex lens with positive optical power. Through the combined design of the third lens L3 and the fourth lens L4, light of different wavelengths can be converged to the same point as much as possible after passing through the third lens L3 and the fourth lens L4, thereby achieving the purpose of correcting chromatic aberration.

[0209] The fifth lens L5 in the third lens group can be a meniscus lens with positive optical power, which can accurately control light at different field angles, correct optical distortion, and match the distortion of the transmitting lens, thereby ensuring the light receiving efficiency at a large angle and improving the imaging quality of the optical lens.

[0210] The sixth lens L6 in the fourth lens group can be a biconcave lens with negative optical power, and the seventh lens L7 in the fourth lens group can be a biconvex lens with positive optical power. Through the combined design of the sixth lens L6 and the seventh lens L7, light of different wavelengths can be converged to the same point as much as possible after passing through the sixth lens L6 and the seventh lens L7, thereby achieving the purpose of further correcting chromatic aberration and optical lens tolerance sensitivity.

[0211] The eighth lens L8 in the fifth lens group can be a biconvex lens with positive optical power, which can improve the resolution performance of the optical lens.

[0212] Alternatively, the first lens group includes the ninth lens L9, the second lens group includes the third lens L3 and the fourth lens L4, the third lens group includes the fifth lens L5, the fourth lens group includes the sixth lens L6 and the seventh lens L7, and the fifth lens group includes the eighth lens L8.

[0213] Among them, the fourth lens L4, the fifth lens L5, the seventh lens L7, and the eighth lens L8 have positive refractive power, and the ninth lens L9, the third lens L3, and the sixth lens L6 have negative refractive power.

[0214] The ninth lens L9 is a meniscus lens, the third lens L3 is a biconcave lens, the fourth lens L4 is a biconvex lens, the fifth lens L5 is a meniscus lens, the sixth lens L6 is a biconcave lens, the seventh lens L7 is a biconvex lens, and the eighth lens L8 is a biconvex lens.

[0215] Optionally, the ninth lens L9 can be understood as a meniscus lens with negative optical power formed by combining the first lens L1 and the second lens L2. This allows the first lens group to only include the ninth lens, thereby achieving the goal of collecting as much light as possible within the field of view, allowing more light to enter the rear optical system, and facilitating a smooth transition of the collected light to the next lens, thereby ensuring sensitivity to optical lens tolerances.

[0216] The five lens groups in the embodiment of the present application adopt an optical architecture of eight lenses (L1, L2, L3, L4, L5, L6, L7, L8) or seven lenses (L9, L3, L4, L5, L6, L7, L8). By setting the shapes of the eight lenses or seven lenses and the reasonable distribution of optical focal length, the laser radar and the camera can share the optical lens, collect and smoothly transmit light to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby improving the high-resolution performance of the optical lens, and thus taking advantage of the fact that the optical lens can combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0217] Optionally, the optical properties of the eight lenses (L1, L2, L3, L4, L5, L6, L7, L8) in the embodiment of the present application can be specifically referred to above. Figure 4 The descriptions of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the eighth lens L8 are omitted here.

[0218] Optionally, the technical effects brought about by the optical characteristics of the optical lens in the embodiment of the present application can be specifically referred to above. Figure 4 The description of the technical effects brought about by the optical characteristics of the optical lens will not be repeated here.

[0219] In summary, the above Figure 4 、 Figure 5 It can be seen from the optical lenses described in the relevant embodiments that the path of light from the object space to the imaging surface of the imaging sensor.

[0220] For details, please refer to Figure 6 , Figure 6 A schematic diagram of a light path provided in an embodiment of the present application.

[0221] like Figure 6As shown, the light from the object space passes through the object-side surface S1 and image-side surface S2 of the first lens L1, the object-side surface S3 and image-side surface S4 of the second lens L2, the object-side surface S5 and image-side surface S6 of the third lens L3, the object-side surface S6 and image-side surface S7 of the fourth lens L4, the aperture STO, the object-side surface S8 and image-side surface S9 of the fifth lens L5, the object-side surface S10 and image-side surface S11 of the sixth lens L6, the object-side surface S11 and image-side surface S12 of the seventh lens L7, and the object-side surface S13 and image-side surface S14 of the eighth lens L8, and is finally imaged on the imaging plane of the imaging sensor.

[0222] Understandable, Figure 6 The light shown passes through Figure 4 、 Figure 5 The path from the optical lens to the imaging surface is shown only as an example and is not drawn strictly to scale, so it should not be used to limit the embodiments of the present application.

[0223] Optionally, the above Figure 4 、 Figure 5 The parameter information (curvature radius, thickness / spacing, material) of each component of the optical lens shown can be shown in Table 1 below:

[0224] Table 1

[0225]

[0226]

[0227] Among them, the above number 1 represents the object-side surface of the first lens L1, the number 2 represents the image-side surface of the first lens L1, the number 3 represents the object-side surface of the second lens L2, the number 4 represents the image-side surface of the second lens L2, the number 5 represents the object-side surface of the third lens L3, the number 6 represents the image-side surface of the third lens L3 and the object-side surface of the fourth lens L4, the number 7 represents the image-side surface of the fourth lens L4, the number STO represents the aperture stop, the number 8 represents the object-side surface of the fifth lens L5, the number 9 represents the image-side surface of the fifth lens L5 As to the side surfaces, serial number 10 denotes the object-side surface of the sixth lens L6, serial number 11 denotes the image-side surface of the sixth lens L6 and the object-side surface of the seventh lens L7, serial number 12 denotes the image-side surface of the seventh lens L7, serial number 13 denotes the object-side surface of the eighth lens L8, serial number 14 denotes the image-side surface of the eighth lens L8, serial number 15 denotes the object-side surface of the spectrometer assembly, serial number 16 denotes the image-side surface of the spectrometer assembly, serial number 17 denotes the front surface of the protective glass of the sensor, and serial number 18 denotes the rear surface of the protective glass of the sensor.

[0228] Optionally, the surface shape (z) of the fifth lens L5 may satisfy the following formula:

[0229]

[0230] Where z is the distance from the vertex of the aspheric surface to the height r along the optical axis, c is the paraxial curvature of the aspheric surface, c = 1 / R, R is the radius of curvature, k is the conic coefficient (conic), a4, a6, a8, a 10 The coefficients of the higher-order terms can be set as shown in Table 2 below:

[0231] Table 2

[0232] Serial number (S) k <![CDATA[a4]]> <![CDATA[a6]]> <![CDATA[a8]]> <![CDATA[a 10 ]]> 8 -6.36E+01 -3.26E-05 4.22E-07 3.27E-08 -3.51E-11 9 -1.31E+00 -3.71E-05 9.04E-06 -1.65E-09 3.59E-10

[0233] Optionally, the surface profile (z) of the eighth lens L8 may satisfy the following formula:

[0234]

[0235] Where z is the distance from the vertex of the aspheric surface to the height r along the optical axis, c is the paraxial curvature of the aspheric surface, c = 1 / R, R is the radius of curvature, k is the conic coefficient (conic), a4, a6, a8, a 10 The coefficients of the higher-order terms can be set as shown in Table 3 below:

[0236] Table 3

[0237] Serial number (S) k <![CDATA[a4]]> <![CDATA[a6]]> <![CDATA[a8]]> <![CDATA[a 10 ]]> 13 -2.53E+00 1.70E-05 4.34E-08 -1.83E-09 3.81E-11 14 -1.88E+00 8.82E-06 6.70E-08 -2.27E-09 4.37E-11

[0238] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of an optical imaging device provided in an embodiment of the present application. The optical imaging device is applied in the field of optical imaging technology, such as optical imaging of laser radar and camera.

[0239] It is understandable that the optical imaging device in the embodiment of the present application can be regarded as the above-mentioned Figure 4 or Figure 5 or, it can be understood that the optical imaging device in the embodiment of the present application can also be regarded as an embodiment that can be executed independently, and the present application does not limit this.

[0240] like Figure 7 As shown, the optical imaging device includes a light splitting component and the above Figure 4 or Figure 5 The optical lens described in the embodiment.

[0241] The optical lens and the light splitting component are coaxially arranged in sequence from the object side to the image side.

[0242] The spectroscopic component is used to receive the light from the optical lens and split the light from the optical lens for transmission.

[0243] It can be understood that the optical imaging device in the embodiment of the present application adopts an optical architecture in which the spectroscopic component is placed behind the optical lens. By setting the optical characteristics of the optical lens, the laser radar and the camera can share the optical lens and the spectroscopic component. The spectroscopic component transmits the light from the optical lens to the photosensitive surface of the laser radar and the photosensitive surface of the camera for imaging, thereby utilizing the advantages of the optical imaging device to combine the point cloud data of the laser radar and the image data of the camera to improve the perception accuracy of intelligent driving.

[0244] In a possible embodiment, the light splitting component includes a prism formed by splicing a first prism and a second prism, and a splicing surface of the first prism and the second prism forms a first angle with the optical axis of the optical lens.

[0245] It can be understood that the spectroscopic component is coaxially arranged with the optical lens, and the splicing surface of the first prism and the second prism in the spectroscopic component forms a first angle with the optical axis of the optical lens, so that after the light from the optical lens is transmitted to the splicing surface of the first prism and the second prism in the spectroscopic component, a turning light path and a straight light path are formed, thereby achieving the purpose of spectroscopic transmission.

[0246] In a possible embodiment, the optical imaging device further includes: a first sensor and a second sensor.

[0247] The first sensor and the second sensor are respectively arranged on the splitting optical path of the splitting component, and the splitting component is used to split the light of the optical lens and transmit it to the first sensor and the second sensor.

[0248] It can be understood that different sensors can be respectively arranged on the turning light path and the straight light path of the spectroscopic component, so that different sensors share the optical lens and the spectroscopic component. The spectroscopic component transmits the light from the optical lens to different sensors for imaging, so that the optical imaging device can combine the perception advantages of different sensors to improve the perception accuracy of intelligent driving.

[0249] In a possible embodiment, the first sensor includes an infrared light sensor, and the second sensor includes a visible light sensor.

[0250] Optionally, the first sensor includes an infrared light sensor, such as a lidar, and the second sensor includes a visible light sensor, such as a camera.

[0251] In a possible embodiment, the first sensor includes a lidar sensor, and the second sensor includes an image sensor.

[0252] It can be understood that through the embodiments of the present application, the advantages of the point cloud data of the lidar and the image data of the camera can be combined to improve the accuracy of intelligent driving perception.

[0253] In a possible embodiment, the first sensor is disposed on a deflecting light path of the light splitting component, and the second sensor is disposed on a straight light path of the light splitting component.

[0254] It can be understood that since the defocus amount of the turning light path of the spectroscopic component is greatly affected by the movement of the spectroscopic component, a first sensor (infrared light sensor) with a larger depth of field (DOF) can be set on the turning light path of the spectroscopic component, and the defocus amount of the straight light path of the spectroscopic component is less affected by the movement of the spectroscopic component, so a second sensor (visible light sensor) with a smaller DOF can be set on the straight light path of the spectroscopic component, thereby achieving high-quality imaging of the first sensor and the second sensor.

[0255] Optionally, see Figure 8 , Figure 8 A schematic diagram of a light path provided in an embodiment of the present application.

[0256] like Figure 8 As shown, light from the object space sequentially passes through the object-side surface S1 and image-side surface S2 of the first lens L1, the object-side surface S3 and image-side surface S4 of the second lens L2, the object-side surface S5 and image-side surface S6 of the third lens L3, the object-side surface S6 and image-side surface S7 of the fourth lens L4, the aperture STO, the object-side surface S8 and image-side surface S9 of the fifth lens L5, the object-side surface S10 and image-side surface S11 of the sixth lens L6, the object-side surface S11 and image-side surface S12 of the seventh lens L7, and the object-side surface S13 and image-side surface S14 of the eighth lens L8. When passing through the spectroscopic component, the spectroscopic component splits and transmits the light from the aforementioned optical lenses, refracts the infrared light and transmits it to the first sensor, where it is imaged on the imaging surface of the first sensor, and directly transmits the visible light to the second sensor, where it is imaged on the imaging surface of the second sensor.

[0257] Understandable, Figure 8 The light shown passes through Figure 7 The path of the optical imaging device reaching the imaging surface is shown only as an example and is not drawn strictly to scale, so it should not constitute a limitation to the embodiments of the present application.

[0258] Optionally, the above Figure 7 The parameter information of each component in the optical imaging device shown can be found in the above Figure 4 The parameter information of the optical lens shown will not be repeated here.

[0259] In a possible embodiment, the first sensor is offset from the center of the light splitting component by a first distance.

[0260] It can be understood that by displacing the first sensor from the center of the light splitting component by a first distance, the field of view (FOV) of the first sensor can be changed, thereby achieving the purpose of the first sensor detecting the sky or detecting the ground.

[0261] Optionally, see Figure 9 , Figure 9 A schematic diagram of a FOV provided in an embodiment of the present application.

[0262] like Figure 9 As shown, by setting the first sensor to be offset from the center of the light-splitting component by a first distance, the FOV of the first sensor can be changed, thereby achieving the purpose of the first sensor detecting the sky or detecting the ground.

[0263] In a possible embodiment, the field of view angle of the optical lens is greater than or equal to the larger field of view angle of the first sensor and the second sensor.

[0264] It can be understood that since the FOVs of the first sensor and the second sensor are different and the first sensor and the second sensor share an optical lens, in order to match sensors with different FOVs, the field of view angle of a single optical lens is designed according to the sensor with a larger FOV, and can be backward compatible with sensors with a smaller FOV, thereby achieving a ratio of different FOVs of the first sensor and the second sensor.

[0265] Optionally, see Figure 10 , Figure 10 A schematic diagram of another FOV provided in an embodiment of the present application.

[0266] like Figure 10 As shown, the field of view angle of a single optical lens is designed according to the larger FOV of the first sensor and the second sensor, that is, designed according to the FOV of the second sensor. It can be backward compatible with the sensor with a smaller FOV, that is, it can be backward compatible with the FOV of the first sensor, thereby realizing a ratio of different FOVs of the first sensor and the second sensor.

[0267] The present application provides a sensing device. Figure 11 , Figure 11 A schematic diagram of a sensing device provided in an embodiment of the present application.

[0268] like Figure 11 As shown, the sensing device 200 includes a light receiving device 100 and a light emitting device 300. The light receiving device 100 may be specifically described in the above description of the optical lens and the optical imaging device.

[0269] The light emitting device 300 is capable of generating an emission light beam. For example, the light emitting device 300 includes a light source. Exemplarily, the light source includes one or more of a vertical surface emitting laser and / or an edge emitting laser (EEL). Wherein, when the vertical surface emitting laser is arranged on a circuit board, the light emitting surface is parallel to the surface of the circuit board, such as one or more of a VCSEL, a PCSEL, a horizontal cavity surface-emitting laser (HCSEL), a fiber laser, etc. For example, the light source may be a single VCSEL chip, or a VCSEL chipset formed by splicing multiple VCSEL chips. An edge emitting laser refers to a laser that emits light through a side surface. In other words, when the edge emitting laser is arranged on a circuit board, the light emitting surface is a side surface (or perpendicular to the surface of the circuit board). Alternatively, the EEL may be replaced by other devices that emit light at the edge of a light emitting element, such as a silicon photonic chip.

[0270] The light receiving device 100 is used to receive a return light beam, which includes an echo of the transmitted light beam and may also include light from other light sources in the environment. The light transmitting device can obtain relevant information about the target in the environment based on the echo of the transmitted light beam.

[0271] Furthermore, the optical receiving device 100 is also used to receive a light beam from the object space. The light beam from the object space includes a return light beam and also includes background light. The optical receiving device 100 can use the feedback light beam to obtain at least a point cloud of the environment, and use the background light beam to obtain an image of the environment.

[0272] The embodiment of the present application also provides a terminal, which includes the optical lens or optical imaging device or sensing device provided by the present application. The terminal here may be an intelligent terminal or a vehicle such as a vehicle, a drone, or a robot. It should be understood that the vehicle here is a vehicle in a broad sense, which may be a vehicle (such as a commercial vehicle, a passenger car, a motorcycle, a flying car, a train, etc.), an industrial vehicle (such as a forklift, a trailer, a tractor, etc.), an engineering vehicle (such as an excavator, a bulldozer, a crane, etc.), an agricultural equipment (such as a mower, a harvester, etc.), etc. For another example, the robot may be an intelligent handling robot (automated guided vehicle, AGV), a walking conversational robot, a service robot, or other robots. One or more optical lenses or optical imaging devices or sensing devices provided by the present application are deployed on the terminal.

[0273] Optionally, the terminal may further include a glass component integrated with the sensing device.

[0274] For details, please refer to Figure 12 , Figure 12This is a schematic diagram of a vehicle provided in an embodiment of the present application. The sensing device can sense the surrounding environment of the vehicle and obtain relevant information about targets in the surrounding environment. The relevant information about these targets can be used to control the vehicle or assist the driver in driving. It should be understood that Figure 12 The sensing device installation locations shown are only examples. In practice, the detection device may be installed in other locations, such as on the top of the cabin, or at the front, side, or rear of the vehicle.

[0275] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An optical lens, characterized in that: The optical lens comprises: At least seven lenses coaxially arranged in sequence from the object side to the image side; The at least seven lenses include at least four lenses with positive optical power and at least three lenses with negative optical power; The at least seven lenses include at least two meniscus lenses, two biconcave lenses, and three biconvex lenses.

2. The optical lens according to claim 1, wherein: The at least seven lenses include: 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; The first lens, the fourth lens, the fifth lens, the seventh lens, and the eighth lens have positive refractive power, and the second lens, the third lens, and the sixth lens have negative refractive power; The first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens.

3. The optical lens according to claim 2, wherein: The object-side surface of the first lens is convex, and the image-side surface of the first lens is concave; The object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; The object-side surface of the third lens is concave, and the image-side surface of the third lens is concave; The object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex; The object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex; The object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; The object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex; The object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is convex.

4. The optical lens according to claim 2 or 3, wherein: The first lens, the second lens, the third lens, the fourth lens, the sixth lens, and the seventh lens are spherical lenses, and the fifth lens and the eighth lens are aspherical lenses.

5. The optical lens according to any one of claims 2 to 4, characterized in that: The third lens and the fourth lens are coupled to each other.

6. The optical lens according to any one of claims 2 to 5, characterized in that: The third lens and the fourth lens are made of different materials.

7. The optical lens according to any one of claims 2 to 6, characterized in that: The sixth lens and the seventh lens are coupled to each other.

8. The optical lens according to any one of claims 2 to 7, characterized in that: The sixth lens and the seventh lens are made of different materials.

9. The optical lens according to any one of claims 2 to 8, wherein: The material of the seventh lens includes a first material, and the first material is used to suppress thermalization of the seventh lens.

10. The optical lens according to any one of claims 2 to 9, characterized in that: The material of the eighth lens includes a second material for suppressing thermalization of the eighth lens.

11. The optical lens according to any one of claims 2 to 10, characterized in that: The object-side surface of the first lens satisfies the following relationship: 0.2≤R1 / T≤0.36; Wherein, R1 is the curvature radius of the object side surface of the first lens, and T is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis.

12. The optical lens according to any one of claims 2 to 11, characterized in that: The focal length of the second lens satisfies the following relationship: -0.24≤f2 / T≤-0.1; Wherein, f2 is the focal length of the second lens, and T is the distance from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis.

13. The optical lens according to any one of claims 2 to 12, characterized in that: The Abbe coefficients of the third lens and the fourth lens satisfy the following relationship: 1.5≤vd3 / vd4≤3; Wherein, vd3 is the Abbe coefficient of the third lens, and vd4 is the Abbe coefficient of the fourth lens.

14. The optical lens according to any one of claims 2 to 13, characterized in that: The object-side surface and the image-side surface of the fifth lens satisfy the following relationship: 0.15≤R8 / R9≤0.6; Wherein, R8 is the curvature radius of the object-side surface of the fifth lens, and R9 is the curvature radius of the image-side surface of the fifth lens.

15. The optical lens according to any one of claims 2 to 14, characterized in that: The Abbe coefficients of the sixth lens and the seventh lens satisfy the following relationship: 0.2≤vd6 / vd7≤0.7; Wherein, vd6 is the Abbe coefficient of the sixth lens, and vd7 is the Abbe coefficient of the seventh lens.

16. The optical lens according to any one of claims 2 to 15, characterized in that: The object-side surface and the image-side surface of the eighth lens satisfy the following relationship: -1.5≤R13 / R14≤-0.9; Wherein, R13 is the curvature radius of the object side surface of the eighth lens, and R14 is the curvature radius of the image side surface of the eighth lens.

17. An optical lens, characterized in that: The optical lens comprises: A first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group are coaxially arranged in sequence from the object side to the image side; The first mirror group is used to collect light in the object space and transmit the light to the second mirror group; The second lens group is used to refract light to correct chromatic aberration; The third lens group is used to refract light to correct optical distortion; The fourth lens group is used to refract light to further correct chromatic aberration; The fifth mirror group is used to suppress thermalization during light transmission.

18. The optical lens according to claim 17, wherein: The first lens group includes a first lens and a second lens, the second lens group includes a third lens and a fourth lens, the third lens group includes a fifth lens, the fourth lens group includes a sixth lens and a seventh lens, and the fifth lens group includes an eighth lens; The first lens, the fourth lens, the fifth lens, the seventh lens, and the eighth lens have positive optical power, and the second lens, the third lens, and the sixth lens have negative optical power. The first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens; or The first lens group includes a ninth lens, the second lens group includes a third lens and a fourth lens, the third lens group includes a fifth lens, the fourth lens group includes a sixth lens and a seventh lens, and the fifth lens group includes an eighth lens; The fourth lens, the fifth lens, the seventh lens, and the eighth lens have positive refractive power, and the ninth lens, the third lens, and the sixth lens have negative refractive power. The ninth lens is a meniscus lens, the third lens is a biconcave lens, the fourth lens is a biconvex lens, the fifth lens is a meniscus lens, the sixth lens is a biconcave lens, the seventh lens is a biconvex lens, and the eighth lens is a biconvex lens.

19. The optical lens according to claim 18, wherein: The object-side surface of the first lens is convex, and the image-side surface of the first lens is concave; The object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; The object-side surface of the third lens is concave, and the image-side surface of the third lens is concave; The object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is convex; The object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex; The object-side surface of the sixth lens is concave, and the image-side surface of the sixth lens is concave; The object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is convex; The object-side surface of the eighth lens is convex, and the image-side surface of the eighth lens is convex.

20. The optical lens according to claim 18 or 19, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the sixth lens, and the seventh lens are spherical lenses, and the fifth lens and the eighth lens are aspherical lenses.

21. An optical imaging device, characterized in that: The optical imaging device comprises: a light splitting component, and an optical lens according to any one of claims 1 to 16, or 17 to 20; Wherein, the optical lens and the beam splitting component are coaxially arranged in sequence from the object side to the image side; The light splitting component is used to receive the light from the optical lens and split the light from the optical lens for transmission.

22. The optical imaging device according to claim 21, wherein: The light splitting component includes a prism formed by splicing a first prism and a second prism, and a splicing surface of the first prism and the second prism forms a first angle with the optical axis of the optical lens.

23. The optical imaging device according to claim 21 or 22, characterized in that: The optical imaging device further includes: a first sensor, a second sensor; Wherein, the first sensor and the second sensor are respectively arranged on the light splitting path of the light splitting component; The light splitting component is used to split the light from the optical lens and transmit it to the first sensor and the second sensor.

24. The optical imaging device according to claim 23, wherein: The first sensor includes an infrared light sensor, and the second sensor includes a visible light sensor.

25. The optical imaging device according to claim 23, wherein: The first sensor includes a lidar sensor, and the second sensor includes an image sensor.

26. The optical imaging device according to claim 24 or 25, characterized in that: The first sensor is arranged on the deflection light path of the light splitting component, and the second sensor is arranged on the straight light path of the light splitting component.

27. The optical imaging device according to any one of claims 24 to 26, characterized in that: The first sensor is offset from the center of the light splitting component by a first distance.

28. The optical imaging device according to any one of claims 23 to 27, characterized in that: The field of view angle of the optical lens is greater than or equal to the larger field of view angle of the first sensor and the second sensor.

29. A terminal, characterized in that: The terminal includes the optical lens according to any one of claims 1 to 16, or the optical lens according to any one of claims 17 to 20, or the optical imaging device according to any one of claims 21 to 28, and the terminal also includes a glass component integrated with the optical imaging device.

Images