Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device, and relates to the field of optical elements. The optical lens comprises, in sequence along an optical axis from a first side to a second side: a first lens with optical power, the first side of which is a concave surface, and the second side of which is a convex surface; a second lens with positive optical power, the first side of which is a convex surface; a third lens with negative optical power, the first side of which is a concave surface, and the second side of which is a concave surface; a fourth lens with positive optical power, the second side of which is a convex surface; a fifth lens with positive optical power, the first side of which is a convex surface; and a sixth lens with negative optical power, the first side of which is a concave surface; the number of lenses with optical power in the optical lens is six; the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all full-glass spherical lenses. The optical lens has high resolution, high imaging quality, high stability, low cost and can be miniaturized.

Description

Technical Field

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

[0002] With the advancement of intelligent driving technology, advanced intelligent driving has gradually entered the public eye, and the solutions for intelligent driving are relatively open and transparent, namely visual perception and radar technology. Automotive optical lenses play a crucial role in long-distance detection and high-performance visual imaging, maintaining stable and efficient performance output even in low-cost, small-space, and harsh environments. For example, on highways, the forward-facing camera of an Advanced Driver-Assistance System (ADAS) can automatically determine distance to other vehicles, perform timely braking and acceleration, or achieve automatic lane changing and collision warning.

[0003] With technological advancements and fierce industry competition, high-performance, cost-effective lenses are currently key to breaking through the current limitations. In optical lenses, the more complex the lens surface shape, the greater the degree of freedom for optimization. However, spherical lenses can only provide one variable for surface shape control: the radius of curvature at the center of the sphere. Aspherical lenses, on the other hand, can introduce higher-order aspherical coefficients as additional variables depending on the expression, making aspherical designs more likely to offer better performance than spherical designs. Under the design requirement of cost reduction, achieving the imaging requirements of optical lenses containing aspherical lenses using an all-glass spherical lens is a goal pursued by those skilled in the art.

[0004] Furthermore, the limited space of existing automotive optical lenses restricts their performance requirements for large apertures and high light throughput, making it impossible to achieve a balance between low cost and high performance. Moreover, harsh environments lead to further material and structural limitations, which exacerbate the trend of declining resolution and sensitivity in automotive optical lenses. Summary of the Invention

[0005] This application aims to provide an optical lens and electronic device to solve at least one of the above-mentioned technical problems.

[0006] The first aspect of this application provides an optical lens comprising, along an optical axis from a first side to a second side: a first lens having optical power, wherein the first side is concave and the second side is convex; a second lens having positive optical power, wherein the first side is convex; a third lens having negative optical power, wherein the first side is concave and the second side is concave; a fourth lens having positive optical power, wherein the second side is convex; a fifth lens having positive optical power, wherein the first side is convex; and a sixth lens having negative optical power, wherein the first side is concave; and a lens having optical power in the optical lens. The number of lenses is six; the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens are all all-glass spherical lenses; the optical lenses satisfy the following relationships: 1.4≤F / ENPD≤1.75, 1.5≤TTL / F≤2.65, -0.85≤F3 / F≤-0.4 and -1≤R11 / F≤-0.35; where F is the focal length of the entire optical lens group, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F3 is the focal length of the third lens, and R11 is the central radius of curvature of the first side surface of the first lens.

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

[0008] In this application, the letters have the following meanings: DFOV is the maximum field of view of the optical lens; H is the image height corresponding to the maximum field of view of the optical lens; θ is the radian value of the maximum field of view of the optical lens; DMAX is the maximum value among the maximum apertures of all lenses corresponding to the maximum field of view of the optical lens; D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens; BFL is the optical back focal length of the optical lens; DST is the effective aperture of the aperture stop; F1 is the focal length of the first lens; F2 is the focal length of the second lens; F5 is the focal length of the fifth lens; F6 is the focal length of the sixth lens; F4 is the focal length of the fourth lens; T12 is the air gap between the first and second lenses; R12 is the central radius of curvature of the second side of the first lens; R21 is the central radius of curvature of the first side of the second lens; T56 is the air gap between the fifth and sixth lenses. Air gap, R61 is the center radius of curvature of the first side of the sixth lens, SAG51 is the sagitta of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sagitta of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, R31 is the center radius of curvature of the first side of the third lens, R32 is the center radius of curvature of the second side of the third lens, CT3 is the center thickness of the third lens, FR51 is the image-side focal length of the first side of the fifth lens, CT6 is the center thickness of the sixth lens, SAG12 is the sagitta of the second side of the first lens corresponding to the maximum field of view of the optical lens, SAG21 is the sagitta of the first side of the second lens corresponding to the maximum field of view of the optical lens, D42 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, CT1 is the center thickness of the first lens.

[0009] According to an exemplary embodiment of this application, the total optical length (TTL) of the optical lens satisfies: 25 ≤ TTL / 1mm ≤ 38.

[0010] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.3≤F / H≤2.2.

[0011] According to an exemplary embodiment of this application, the focal length F of the entire optical lens group and the focal length F1 of the first lens satisfy: 0 < |F / F1| ≤ 0.24.

[0012] According to an exemplary embodiment of this application, the focal length F5 of the fifth lens and the focal length F of the entire optical lens group satisfy: 0.6≤F5 / F≤1.3.

[0013] According to an exemplary embodiment of this application, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: -1.6≤F6 / F≤-0.65.

[0014] According to an exemplary embodiment of this application, the focal length F4 of the fourth lens and the focal length F of the entire optical lens group satisfy: 1.5≤F4 / F≤1.85.

[0015] According to an exemplary embodiment of this application, the air gap T12 between the first lens and the second lens, the central curvature radius R12 of the second side surface of the first lens and the central curvature radius R21 of the first side surface of the second lens satisfy: 0.65≤(T12-R12) / R21≤1.3.

[0016] According to an exemplary embodiment of this application, the air gap T56 between the fifth lens and the sixth lens satisfies the following condition with respect to the center curvature radius R61 of the first side surface of the sixth lens: -1.25≤T56 / R61≤-0.18.

[0017] According to an exemplary embodiment of this application, the sagitta SAG51 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens and the sagitta SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: -6≤SAG51 / SAG42≤-1.85.

[0018] According to an exemplary embodiment of this application, the central curvature radius R31 of the first side surface of the third lens, the central curvature radius R32 of the second side surface of the third lens, and the central thickness CT3 of the third lens satisfy: -2.2≤R31 / (R32-CT3)≤-0.7.

[0019] According to an exemplary embodiment of this application, the center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy: 0.03≤CT6 / F≤0.13.

[0020] According to an exemplary embodiment of this application, the center thickness CT6 of the sixth lens and the optical back focal length BFL of the optical lens satisfy the following condition: 0.11≤CT6 / BFL≤0.55.

[0021] According to an exemplary embodiment of this application, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45.

[0022] According to an exemplary embodiment of this application, the central curvature radius R11 of the first side surface of the first lens, the central thickness CT1 of the first lens, and the central curvature radius R12 of the second side surface of the first lens satisfy: 0.65≤R11 / (CT1+R12)≤1.7.

[0023] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 52≤(DFOV×F) / H / 1°≤65, 0.065≤TTL / H / DFOV×1°≤0.15, 2.3≤TTL / DMAX≤3.3, 0.75≤(F×θ) / D11 / 1rad≤1.1, 0.02≤D11 / H / DFOV×1°≤0.05, 0.06≤BFL / TTL≤0.18, 0.5≤DST / F≤0. 8. 0 < |(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.045, 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1, 0.6≤F2 / F≤1.8, 0.3≤FR51 / F≤0.7, 1.58≤F4 / F≤1.65, -1.65≤SAG12 / SAG21≤-0.65 or -0.165≤SAG42 / (D42 / 2)≤-0.045.

[0024] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 56.842≤(DFOV×F) / H / 1°≤59.185, 1.779≤TTL / F≤2.376, 0.085≤TTL / H / DFOV×1°≤0.123, 2.515≤TTL / DMAX≤3.108, 0.805≤(F×θ) / D11 / 1rad≤0.956, 0.027≤D11 / H / DFOV×1°≤0.043, 0.071 ≤BFL / TTL≤0.168, 1.451≤F / H≤1.984, 1.4≤F / ENPD≤1.7, 0.607≤DST / F≤0.745, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1ra d) / (1mm-1mm×1rad)≤0.032, 0.934≤(H / 2) / (F×tan(θ / 2))≤0.987, 0.027≤|F / F1|≤0.203, 0.785≤F2 / F≤1.545, -0 .817≤F3 / F≤-0.521, 1.6≤F4 / F≤1.605, 0.763≤F5 / F≤1.067, -1.234≤F6 / F≤-0.814, -0.795≤R11 / F≤-0.643, 0.787 ≤(T12-R12) / R21≤1.179, -1.058≤T56 / R61≤-0.237, -5.351≤SAG51 / SAG42≤-2.353, -1.911≤R31 / (R32-CT3)≤-0. 85, 0.495≤FR51 / F≤0.584, 0.044≤CT6 / F≤0.097, -1.415≤SAG12 / SAG21≤-0.808, 0.127≤CT6 / BFL≤0.506, -0.141≤SAG42 / (D42 / 2)≤-0.061, 0.849≤R11 / (CT1+R12)≤1.35, 29.0006≤TTL / 1mm≤35.0001 or 28.6459≤DFOV / 1°≤40.514.

[0025] The second aspect of this application provides an electronic device comprising an optical lens as described in the exemplary embodiments above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the light source is located on a second side of the optical lens, and the light emitted by the light source is projected onto a first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side of the optical lens.

[0026] The optical lens according to the embodiments of this application employs six lenses with optical power, wherein the first side of the first lens is concave and the second side of the first lens is convex. Object-side parallel light first arrives at the first side of the first lens and diverges, then passes through the second side of the first lens and is moderately converged; the incident angles of the light rays on the two sides of the first lens are evenly distributed, which can correct preliminary aberrations.

[0027] The second lens has positive optical power. The first lens only slightly deflects the light, resulting in almost no rapid beam contraction. Relying on the strong positive optical power of the second lens, parallel light can be converged significantly, enabling both compact size and substantial correction of spherical aberration. It also allows light to enter smoothly and fill the entrance pupil, achieving a small aperture. The first side of the second lens is convex, receiving light transmitted from the second side (convex) of the first lens. This avoids abrupt changes in the light's deflection angle that could lead to high sensitivity, and further compresses the light as it enters the entrance pupil, facilitating a larger aperture.

[0028] The third lens has negative optical power, which can directly cancel the positive spherical aberration generated by the strong positive lens of the second lens. The negative optical power of the third lens also provides reverse axial chromatic aberration, which compensates for the positive chromatic aberration of the second lens, reducing axial chromatic aberration of the optical lens, ensuring clear colors for signal lights and targets at both near and far distances, and eliminating chromatic aberration blurring of targets at different distances. The first side surface of the third lens is concave, and the second side surface is also concave. The double concave shape of the third lens can share the pressure of aberration and field curvature correction, raise the beam height, adjust the incident angle of edge rays, and adapt the beam to the aperture diameter.

[0029] The fourth lens has positive optical power, which can converge light rays, control the beam height at the rear, and prevent the subsequent aperture from being too large. The positive lens of the fourth lens adjusts the incident posture of the light rays at the edge of the field of view and absorbs the residual aberrations of the previous group. The positive lens of the fourth lens and the negative lens of the adjacent third lens form a positive-negative pair to achieve achromatic aberration. The second side surface of the fourth lens is convex.

[0030] The fifth lens has positive optical power, distributing the converging pressure of the subsequent lens groups, avoiding the excessively steep surface of the fourth lens, reducing higher-order spherical aberrations produced by a single lens, and making it easier to achieve large-aperture imaging. The four and fifth lenses, two consecutive positive lenses, progressively converge light rays, allowing for flexible adjustment of the light tilt angle reaching the sixth lens. The first side surface of the fifth lens is convex, while the second side surface of the fourth lens and the first side surface of the fifth lens are continuously convex. This double convergence of light rays diverging through the third lens (a double-concave negative lens) avoids excessive light divergence and energy loss.

[0031] The sixth lens has negative optical power, which can reverse the deflection of dispersed light of different wavelengths, correct transverse chromatic aberration, and ensure that lane lines and traffic lights are imaged without obvious color fringing. The first side of the sixth lens is concave, which can correct aberrations and field curvature of the convex surface in front, which helps to improve resolution. The diverging light can flexibly adjust the angle of light incident on the chip surface, improving image cleanliness.

[0032] The first, second, third, fourth, fifth, and sixth lenses are all all-glass spherical lenses. The lenses from the first to the sixth lens are made of glass, and through the combination of materials and structure, a heat-free function is achieved.

[0033] By rationally allocating the optical power ratio of the six lenses, the lens surface structure, and the center thickness and curvature parameters of each lens on the optical axis, while controlling the overall size and optical ratio of the optical lens, the optical lens can meet the following requirements: 1.4≤F / ENPD≤1.75, 1.5≤TTL / F≤2.65, -0.85≤F3 / F≤-0.4, and -1≤R11 / F≤-0.35. This enables the realization of a low-cost vehicle-mounted telephoto lens that also balances a large aperture and low sensitivity.

[0034] The focal length F of the entire optical lens assembly and the entrance pupil diameter ENPD of the optical lens satisfy the condition: 1.4≤F / ENPD≤1.75, which gives the optical lens a large aperture and enables it to adapt to low-light environments during use.

[0035] The total optical length and the total focal length F of the optical lens satisfy the condition: 1.5≤TTL / F≤2.65, which balances the total optical length and the total focal length of the optical lens and achieves the long focal length and miniaturization characteristics required by the optical lens.

[0036] The focal length F3 of the third lens satisfies the following condition with the overall focal length F of the optical lens group: -0.85≤F3 / F≤-0.4. The third lens moderately raises the height of the rear light rays, broadening the beam to match the requirements of high-resolution, large-area imaging. It also allows the fourth, fifth, and sixth lenses to share the light load, balancing the generation of spherical aberration and astigmatism between the front and rear groups. After the third lens reshapes the beam trajectory, the rear lenses can independently perform fine correction of residual aberrations, principal ray angles, and distortion, improving image quality.

[0037] The central curvature radius R11 of the first side surface of the first lens satisfies the following condition with the focal length F of the entire optical lens group: -1≤R11 / F≤-0.35. The first side surface of the first lens is concave and relatively curved, which can effectively collect large-angle light from the object side and achieve the requirements of long focal length and large target surface imaging for the vehicle-mounted forward-looking optical lens. Attached Figure Description

[0038] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Figure 1 - Figure 14 Schematic diagrams of the optical lenses according to Embodiments 1-14 of this application are shown respectively; Figure 15 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown. Figure 16 A schematic diagram of the distortion of an optical lens according to Embodiment 1 of this application is shown; Figure 17 A schematic diagram of the relative illumination of an optical lens according to Embodiment 1 of this application is shown; Figure 18 A schematic diagram showing the height of the first side of the fifth lens corresponding to the maximum field of view of the optical lens according to an embodiment of the present application and the height of the second side of the fourth lens corresponding to the maximum field of view of the optical lens; Figure 19 A schematic diagram showing the height of the second side of the first lens corresponding to the maximum field of view of the optical lens according to an embodiment of the present application and the height of the first side of the second lens corresponding to the maximum field of view of the optical lens are shown.

[0039] Explanation of reference numerals in the attached figures: First lens L1; Second lens L2; ​​Third lens L3; Fourth lens L4; Fifth lens L5; Sixth lens L6; Aperture stop STO; Protective glass L7; Filter L8; Image plane IMA; The first side surface S1 of the first lens L1, and the second side surface S2 of the first lens L1; The first side surface S3 of the second lens L2, the second side surface S4 of the second lens L2; The first side surface S5 of the third lens L3, the second side surface S6 of the third lens L3; The first side surface S7 of the fourth lens L4, and the second side surface S8 of the fourth lens L4; The first side surface S9 of the fifth lens L5, and the second side surface S10 of the fifth lens L5; The first side surface S11 of the sixth lens L6, and the second side surface S12 of the sixth lens L6; The first side of the protective glass L7 is S13, and the second side of the protective glass L7 is S14. The first side surface S15 of filter L8, and the second side surface S16 of filter L8. Detailed Implementation

[0040] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. It should be noted that in this specification, the terms first, second, third, etc., are used only to distinguish one feature from another and do not indicate any limitation on the features. Therefore, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of this application. In the drawings, for ease of illustration, the thickness, size, and shape of the lenses have been slightly exaggerated. Specifically, the shapes of spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly drawn to scale.

[0041] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. It should also be understood that the terms "comprising," "including," and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the term "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration. Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., terms defined in common dictionaries) should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense, unless expressly so defined herein. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] The features, principles and other aspects of this application are described in detail below.

[0043] An optical lens according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0044] In an example embodiment, the optical lens can be used as, for example, an imaging optical lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is provided with an imaging surface. The imaging optical lens can be a vehicle-mounted optical lens, a security monitoring optical lens, or a radar receiver optical lens. In an example embodiment, the optical lens can be used as, for example, a projection optical lens or a lidar transmitter optical lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is provided with an image source surface. In an example embodiment, the optical lens provided in this application can be used as a light-receiving optical lens or a light-emitting optical lens. The light-receiving optical lens is typically used to collect light from the object-side space. The collected light is used to form detection information, including but not limited to imaging and laser point clouds. The light-emitting optical lens is typically used to transmit light from a light-emitting unit to the object-side space. According to the function of the light, the light transmitted to the object-side space can be divided into projection light for forming a projected image or detection light for detecting target information, etc. It is understood that when the optical lens provided in this application is used as a light-receiving optical lens such as a camera optical lens, a lidar receiver optical lens, a microscopic optical lens, or a telescope optical lens, the term "first side" as used herein can refer to the object side, and "second side" can refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. A camera optical lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting optical lens such as a projection optical lens or a lidar transmitter optical lens, the term "first side" as used herein can refer to the object side, and "second side" can refer to the light source side. In some possible implementations, the optical lens provided in this application can also simultaneously perform light-receiving and light-emitting functions. For example, the optical lens provided in this application is used in a lidar optical lens that shares a light-receiving and light-emitting path, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. For example, the optical lens provided in this application is used in an optical communication and radar integration optical lens, which simultaneously performs the functions of transmitting modulated optical signals and receiving radar echo beams.

[0045] In the example embodiment, the first lens has either negative or positive optical power. The first lens has a relatively low optical power. When parallel light from the outside world first enters the first lens, the light is refracted smoothly, distributing the light deflection pressure to the subsequent lenses. Because small-angle optical lenses have a small field of view but a long object distance (tens to hundreds of meters), the requirements for far-axis coma, spherical aberration, and distortion are stringent. The relatively low optical power of the first lens allows for smooth incident refraction, significantly reducing the fundamental aberrations generated by the preceding elements and reducing the aberration compensation burden on subsequent lenses. The first side of the first lens is concave, and the second side is convex. Object-side parallel light first arrives at the first side (concave) of the first lens and diverges, then moderately converges after passing through the second side (convex). The balanced distribution of the incident angles on the two sides of the first lens can correct initial aberrations.

[0046] In the example implementation, the second lens has positive optical power. The first lens only slightly deflects the light beam, resulting in almost no rapid contraction. Relying on the strong positive optical power of the second lens, parallel light can be converged significantly, enabling both compression to achieve a small size and substantial correction of spherical aberration. It also allows light to smoothly enter the rear, filling the entrance pupil and achieving a small aperture. The first side of the second lens is convex, receiving light transmitted from the second side (convex) of the first lens. This avoids abrupt changes in the light deflection angle that could lead to high sensitivity and further compresses the light entering the rear, facilitating a large aperture. The second side of the second lens can be concave or convex.

[0047] In the example embodiment, the third lens has negative optical power, which can directly cancel the positive spherical aberration generated by the strong positive lens of the second lens. The negative optical power of the third lens also provides reverse axial chromatic aberration, which compensates for the positive chromatic aberration of the second lens, reducing the axial chromatic aberration of the optical lens, ensuring clear colors for signal lights and targets at both near and far distances, and eliminating chromatic aberration blurring of targets at different distances. The first side surface of the third lens is concave, and the second side surface is also concave. The double concave shape of the third lens can share the pressure of aberration and field curvature correction, raise the beam height, adjust the incident angle of edge rays, and adapt the beam to the aperture aperture.

[0048] In the example embodiment, the fourth lens has positive optical power, which can converge light rays, control the height of the rear beam, and prevent the subsequent aperture from being too large; the positive lens of the fourth lens adjusts the incident posture of the edge field of view rays and absorbs the residual aberrations of the previous group; the positive lens of the fourth lens and the negative lens of the adjacent third lens form a positive-negative pair to achieve achromatic aberration. The first side surface of the fourth lens is convex or concave. The second side surface of the fourth lens is convex.

[0049] In the example implementation, the fifth lens has positive optical power, distributing the converging pressure of the subsequent lens group, avoiding an excessively steep surface of the fourth lens, reducing higher-order spherical aberrations generated by a single lens, and making it easier to achieve large-aperture imaging. The four and fifth lenses, two consecutive positive lenses, progressively converge light rays, allowing for flexible adjustment of the light angle reaching the sixth lens. The first side of the fifth lens is convex, and the second side of the fourth lens and the first side of the fifth lens are continuously convex, converging the diverging light rays emitted by the third lens with a double concave negative element twice, avoiding excessive light divergence and energy loss. The second side of the fifth lens can be concave or convex.

[0050] In the example implementation, the sixth lens has a negative optical power. Light passing through the fourth and fifth lenses, two positive lenses, easily produces residual transverse chromatic aberration. The sixth lens, being close to the image plane, has extremely high efficiency in deflecting the principal rays at the edge of the field of view. The negative optical power of the sixth lens allows it to deflect dispersive light of different wavelengths in the opposite direction, correcting transverse chromatic aberration and ensuring that lane lines and traffic lights are imaged without obvious color fringing. The first side of the sixth lens is concave, which can correct aberrations and field curvature of the convex surface in front, improving resolution. The diverging light can flexibly adjust the angle of light incident on the chip surface, improving image cleanliness. The second side of the sixth lens can be either convex or concave.

[0051] In an example embodiment, the optical lens may further include an aperture stop disposed between the second lens and the third lens. The aperture stop, located between the second and third lenses, facilitates effective light convergence entering the optical lens, reduces the lens aperture at the rear end of the optical lens, and lowers the assembly sensitivity of the optical lens.

[0052] In the example implementation, the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens are all all-glass spherical lenses. The lenses of the first to sixth lenses are made of glass, and through the combination of materials and structure, a heat-free function is achieved.

[0053] In the example embodiment, the second side surface of the second lens and the first side surface of the third lens are both spherical, with opposite surface shapes, similar absolute values ​​of their central radii of curvature, and small central air gaps on both sides. When the aperture stop is not limited between the second and third lenses, the second and third lenses tend to be cemented together, and they can be cemented together as a composite.

[0054] In an example embodiment, the optical lens may further include an infrared cut-off filter (IR) located between the sixth lens and the image plane to filter light of different wavelengths. The optical lens may also, as needed, have a cover glass (CG) between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0055] In an example embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0056] In the example implementation, the total optical length (TTL) of the optical lens satisfies: 25 ≤ TTL / 1mm ≤ 38. Preferably, 29.0006 ≤ TTL / 1mm ≤ 35.0001. Controlling the TTL range allows the optical lens sufficient space to arrange six global surface glass lenses, enabling precise correction of field curvature, chromatic aberration, and distortion, achieving high MTF at long distances. When the TTL is excessively compressed, it leads to crowded lens arrangement, difficulty in allocating positive and negative optical power, poor far-field edge resolution, and large errors in the telephoto distance calculation of the optical lens.

[0057] In the example implementation, the maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45. Preferably, 28.6459 ≤ DFOV / 1° ≤ 40.514. The DFOV can be the maximum field of view when paired with an imaging chip with a diagonal size of 9.25mm. Controlling the range of DFOV ensures that the optical lens has sufficient lateral field of view to avoid blind spots such as curves, merging points, and road signs, while also preventing ranging errors, distortion, and edge dimming caused by an excessively large field of view.

[0058] In the example implementation, the maximum field of view (DFOV) of the optical lens, the focal length F of the entire optical lens assembly, and the image height H corresponding to the maximum field of view satisfy: 52 ≤ (DFOV × F) / H / 1° ≤ 65. Preferably, 56.842 ≤ (DFOV × F) / H / 1° ≤ 59.185. Controlling the range of this relationship allows the optical lens to possess telephoto and large-aperture characteristics, realizing the telephoto function of the lens and eight million or even ten million pixels.

[0059] In the example implementation, the total optical length (TTL) of the optical lens and the focal length (F) of the entire optical lens assembly satisfy: 1.5 ≤ TTL / F ≤ 2.65. Preferably, 1.779 ≤ TTL / F ≤ 2.376. By controlling the range of this relationship, the total optical length and focal length of the optical lens are balanced, achieving the required telephoto and miniaturized characteristics of the optical lens.

[0060] In the example implementation, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (DFOV) of the optical lens, and the maximum field of view (DFOV) of the optical lens satisfy the following condition: 0.065 ≤ TTL / H / DFOV × 1° ≤ 0.15. Preferably, 0.085 ≤ TTL / H / DFOV × 1° ≤ 0.123. By controlling the range of this relationship, the optical lens can achieve both miniaturization and large-area imaging, meeting the application scenarios of eight million or even ten million pixels.

[0061] In the example implementation, the total optical length (TTL) of the optical lens and the maximum value (DMAX) of the maximum aperture of each lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 2.3 ≤ TTL / DMAX ≤ 3.3. Preferably, 2.515 ≤ TTL / DMAX ≤ 3.108. By controlling the range of this relationship and keeping the ratio of the total optical length to the maximum lens aperture small, the entire optical lens can be made more compact and smaller.

[0062] In the example embodiment, the focal length F of the entire optical lens assembly, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy: 0.75 ≤ (F×θ) / D11 / 1rad ≤ 1.1. Preferably, 0.805 ≤ (F×θ) / D11 / 1rad ≤ 0.956. By controlling the range of this relationship, when the maximum field of view of the optical lens is constant, a smaller maximum aperture of the optical lens can result in a smaller front aperture of the optical lens, thereby reducing the imaging volume of the optical lens.

[0063] In the example embodiment, the maximum aperture D11 of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view DFOV of the optical lens satisfy: 0.02≤D11 / H / DFOV×1°≤0.05. Preferably, 0.027≤D11 / H / DFOV×1°≤0.043. Controlling the range of this relationship allows the optical lens to have miniaturization and large target surface characteristics, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0064] In the example implementation, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the following condition: 0.06 ≤ BFL / TTL ≤ 0.18. Preferably, 0.071 ≤ BFL / TTL ≤ 0.168. By controlling the range of this relationship, while satisfying miniaturization, a certain amount of space is left for the back end to achieve low sensitivity.

[0065] In the example implementation, the focal length F of the entire optical lens assembly and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.3 ≤ F / H ≤ 2.2. Preferably, 1.451 ≤ F / H ≤ 1.984. By controlling the range of this relationship, the optical lens possesses telephoto and large-area characteristics, realizing the telephoto function of the optical lens and eight million or even ten million pixels.

[0066] In the example embodiment, the focal length F of the entire optical lens assembly and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.4 ≤ F / ENPD ≤ 1.75. Preferably, 1.4 ≤ F / ENPD ≤ 1.7. By controlling the range of this relationship, the optical lens can have a larger aperture, enabling it to adapt to low-light environments during use.

[0067] In the example implementation, the effective aperture diameter (DST) of the aperture stop and the total focal length (F) of the optical lens satisfy the following condition: 0.5 ≤ DST / F ≤ 0.8. Preferably, 0.607 ≤ DST / F ≤ 0.745. By controlling the range of this relationship, a larger ratio of aperture stop diameter to total focal length results in a larger aperture number for the optical lens.

[0068] In the example embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0 < |(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.045. Preferably, 0.002≤|(HF×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.032. Controlling the range of this relationship results in a high angular refractive index in the central region of the optical lens, which is beneficial to improving the imaging effect in the central region.

[0069] In the example implementation, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the entire optical lens group, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1. Preferably, 0.934≤(H / 2) / (F×tan(θ / 2))≤0.987. By controlling the range of this relationship, the edge distortion of the optical lens is small, resulting in a large angular resolution for each field of view and good resolving capability for each field of view.

[0070] In the example embodiment, the focal length F of the entire optical lens group and the focal length F1 of the first lens satisfy: 0 < |F / F1| ≤ 0.24. Preferably, 0.027 ≤ |F / F1| ≤ 0.203. By controlling the range of this relationship, when light first enters the first lens, the light path is smooth, which can significantly reduce the fundamental aberrations generated by the front lens group, reduce the aberration compensation burden of subsequent lenses from the source, and improve image quality.

[0071] In the example embodiment, the focal length F2 of the second lens and the focal length F of the entire optical lens assembly satisfy: 0.6 ≤ F2 / F ≤ 1.8. Preferably, 0.785 ≤ F2 / F ≤ 1.545. By controlling the range of this relationship, compressed light can enter the rear, filling the entrance pupil, reducing light energy loss and increasing light flux, thus achieving a large aperture.

[0072] In the example implementation, the focal length F3 of the third lens and the focal length F of the entire optical lens group satisfy: -0.85≤F3 / F≤-0.4. Preferably, -0.817≤F3 / F≤-0.521. By controlling the range of this relationship, the third lens can appropriately raise the height of the rear light rays, stretching the beam to match the imaging requirements of high-pixel, large-area targets, and allowing the rear fourth, fifth, and sixth lenses to share the light load, balancing the generation of spherical aberration and astigmatism in the front and rear groups. After the third lens diverges and reshapes the beam trajectory, the rear lenses can independently perform fine correction of residual aberration, chief ray angle (CRA), and distortion, improving image quality.

[0073] In the example embodiment, the focal length F4 of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: 1.5 ≤ F4 / F ≤ 1.85. Preferably, 1.58 ≤ F4 / F ≤ 1.65. Further, 1.6 ≤ F4 / F ≤ 1.605. By controlling the range of this relationship, the fourth lens converges the light rays, preventing excessive divergence of the light rays after passing through the biconcave negative third lens, which would lead to uncontrollable aperture and total length of subsequent lenses.

[0074] In the example implementation, the focal length F5 of the fifth lens and the focal length F of the entire optical lens assembly satisfy: 0.6 ≤ F5 / F ≤ 1.3. Preferably, 0.763 ≤ F5 / F ≤ 1.067. By controlling the range of this relationship, the fifth lens not only further converges the light emitted from the front positive fourth lens, reducing light energy loss, but also works with the rear sixth negative lens to achieve field curvature balance and chromatic aberration correction, disperse the convergence load of the optical lens, and improve the full field-of-view imaging performance.

[0075] In the example implementation, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: -1.6 ≤ F6 / F ≤ -0.65. Preferably, -1.234 ≤ F6 / F ≤ -0.814. The sixth lens bears the aberration pressure generated by the static front, controlling the range of this relationship. While balancing aberrations, it also controls the landing point of light on the image plane, improving the sensor imaging quality, smoothing the trend of continuous light convergence, adjusting the optical path difference between the center and edge fields of view, and facilitating the control of the CRA of light incident on the chip surface.

[0076] In the example embodiment, the central radius of curvature R11 of the first side surface of the first lens and the focal length F of the entire optical lens assembly satisfy: -1≤R11 / F≤-0.35. Preferably, -0.795≤R11 / F≤-0.643. By controlling the range of this relationship, the first side surface of the first lens is concave and relatively curved, which can effectively collect large-angle light from the object side, achieving the long-focal-length and large-target-area imaging requirements of the vehicle-mounted forward-looking optical lens.

[0077] In the example embodiment, the air gap T12 between the first lens and the second lens, the central radius of curvature R12 of the second side surface of the first lens, and the central radius of curvature R21 of the first side surface of the second lens satisfy the following condition: 0.65 ≤ (T12 - R12) / R21 ≤ 1.3. Preferably, 0.787 ≤ (T12 - R12) / R21 ≤ 1.179. Controlling the range of this relationship allows light to quickly enter the second lens after exiting the first lens, avoiding light loss due to divergence from the concave surface of the first side surface of the first lens, and increasing the light transmission.

[0078] In the example embodiment, the air gap T56 between the fifth and sixth lenses and the center radius of curvature R61 of the first side surface of the sixth lens satisfy: -1.25 ≤ T56 / R61 ≤ -0.18. Preferably, -1.058 ≤ T56 / R61 ≤ -0.237. By controlling the range of this relationship, while ensuring the total optical length of the small optical lens, the air gap between the positive fifth lens and the negative sixth lens is appropriately increased, and the second side surface of the third lens is gently sloping. This is beneficial because the light emitted from the third lens into the fourth lens is not excessively deflected, thus reducing the sensitivity at this point.

[0079] In the example implementation, the sag SAG51 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens and the sag SAG42 of the second side of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: -6 ≤ SAG51 / SAG42 ≤ -1.85. A schematic diagram of SAG51 and SAG42 is shown below. Figure 18 As shown. It should be noted that the sagitta value is positive when the optical axis of the lens runs from the first side to the second side, and negative in the opposite direction. Preferably, -5.351 ≤ SAG51 / SAG42 ≤ -2.353. By controlling the range of this relationship, the surface shape of the first convex surface of the fifth lens is more gently sloping than that of the second convex surface of the fourth lens. This avoids excessive superposition of the two convergence angles of light, which would cause the light to be sharply deflected when entering the sixth lens, contributing to the low sensitivity at the rear of the lens.

[0080] In the example embodiment, the central radius of curvature R31 of the first side of the third lens, the central radius of curvature R32 of the second side of the third lens, and the central thickness CT3 of the third lens satisfy: -2.2 ≤ R31 / (R32-CT3) ≤ -0.7. Preferably, -1.911 ≤ R31 / (R32-CT3) ≤ -0.85. By controlling the range of this relationship, the third lens has a certain central thickness, which regulates the optical path difference of light rays in each field of view, appropriately diverges the beam, raises the beam height, adjusts the incident angle of edge rays, adapts the beam to the aperture stop size, optimizes the light distribution at the aperture stop, and improves vignetting. In addition, if the central thickness of the third lens becomes thinner, the optical path of light passing through the third lens is shorter, and the light heights of the two surfaces are almost the same, which will lead to severe coupling of aberrations between the two surfaces.

[0081] In the example embodiment, the single-sided focal length FR51 of the first side of the fifth lens and the overall focal length F of the optical lens assembly satisfy: 0.3 ≤ FR51 / F ≤ 0.7. Preferably, 0.495 ≤ FR51 / F ≤ 0.584. FR51 refers to the single-sided focal length of the first side of the fifth lens on the glass medium side when light enters from air. By controlling the range of this relationship, the light is effectively converged on the first side of the fifth lens, which is beneficial for further correcting aberrations caused by the concave surface in front and improving image quality.

[0082] In the example embodiment, the center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy: 0.03≤CT6 / F≤0.13. Preferably, 0.044≤CT6 / F≤0.097. Controlling the range of this relationship is beneficial for achieving lightweight optical lenses, and the smaller center thickness of the sixth lens results in lower sensitivity to temperature drift.

[0083] In the example embodiment, the sagitta SAG12 of the second side surface of the first lens corresponding to the maximum field of view of the optical lens and the sagitta SAG21 of the first side surface of the second lens corresponding to the maximum field of view of the optical lens satisfy: -1.65 ≤ SAG12 / SAG21 ≤ -0.65. Preferably, -1.415 ≤ SAG12 / SAG21 ≤ -0.808. A schematic diagram of SAG12 and SAG21 is shown below. Figure 19 As shown. Controlling the range of this relationship can balance the degree of refraction of the central and peripheral rays, avoiding excessive bending of the peripheral rays and preventing the generation of advanced spherical aberration and coma; moreover, the light rays converge at this point with two refraction angles that are close to each other, which helps to reduce sensitivity and improve imaging stability.

[0084] In the example implementation, the center thickness CT6 of the sixth lens and the optical back focal length BFL of the optical lens satisfy the following condition: 0.11 ≤ CT6 / BFL ≤ 0.55. Preferably, 0.127 ≤ CT6 / BFL ≤ 0.506. To control this relationship, the sixth lens is a negative power lens with a thin center thickness. The beam converged by the fourth and fifth lenses is incident on the sixth lens, where the negative lens effect of the sixth lens diverges the converging beam, delaying beam convergence and resulting in a longer optical back focal length. A longer optical back focal length allows for sufficient assembly space for optical lens components, sensors, etc., reducing assembly tolerance sensitivity.

[0085] In the example implementation, the sag SAG42 of the second side surface of the fourth lens corresponding to the maximum field of view of the optical lens and the maximum aperture D42 of the second side surface of the fourth lens corresponding to the maximum field of view of the optical lens satisfy: -0.165≤SAG42 / (D42 / 2)≤-0.045. Preferably, -0.141≤SAG42 / (D42 / 2)≤-0.061. By controlling the range of this relationship, the sag of the second side surface of the fourth lens, combined with a larger effective aperture, results in a smaller angle deflection of light rays exiting from the second side surface at the edge of the field of view. This also reduces the reflectivity of light rays reaching subsequent lenses, weakening stray light and secondary ghosting formed by back-and-forth reflections within the air gap between the fourth and fifth lenses, and improving the imaging performance of the automotive optical lens in backlight (headlights, sunlight).

[0086] In the example embodiment, the central radius of curvature R11 of the first side surface of the first lens, the central thickness CT1 of the first lens, and the central radius of curvature R12 of the second side surface of the first lens satisfy: 0.65≤R11 / (CT1+R12)≤1.7. Preferably, 0.849≤R11 / (CT1+R12)≤1.35. Controlling the range of this relationship allows the first lens, which is close to the object-side light source, to have a relatively smooth path when collecting object-side light, avoiding too much aberration at the source. Furthermore, satisfying this relationship allows the first lens to achieve light collection with a smaller aperture.

[0087] In the example implementation, the optical lenses satisfy the following conditions: 0 < |F / F1| ≤ 0.24, 0.6 ≤ F2 / F ≤ 1.8, -0.85 ≤ F3 / F ≤ -0.4, 1.5 ≤ F4 / F ≤ 1.85, 0.6 ≤ F5 / F ≤ 1.3, and -1.6 ≤ F6 / F ≤ -0.65. By controlling the range of these relationships, the first lens has a weak optical power, which can smoothly guide light into the system. The second lens can flexibly adjust the light according to the first lens, allowing the light to transition smoothly in front. The third lens, together with the positive fourth and fifth lenses, forms a negative-positive ratio of strong optical power, dominating the imaging effect of the light. The sixth lens negatively controls the final imaging power and the final field curvature correction. This joint constraint achieves the simultaneous requirements of spherical aberration balance, chromatic aberration control, distortion suppression, 8-megapixel high resolution, and miniaturization. Under the all-glass spherical constraint, the above-mentioned collaborative architecture achieves joint correction of multiple aberrations solely through the focal length ratio of the spherical lenses.

[0088] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the six lenses mentioned above. By rationally allocating the optical parameters of each lens, the optical lens achieves small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, low distortion, small principal angle, high illumination, and good manufacturability. It can also be well-matched to, for example, automotive chips without producing vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of, for example, automotive applications.

[0089] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0090] Example 1 The following is for reference Figure 1 Describes an optical lens according to Embodiment 1 of this application. For example... Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. An aperture stop STO can be positioned between the second lens L2 and the third lens L3.

[0091] The first lens L1 has negative optical power, its first side surface S1 is concave, and its second side surface S2 is convex.

[0092] The second lens L2 has positive optical power, and its first side surface S3 is convex, and its second side surface S4 is convex.

[0093] The third lens L3 has negative optical power, and its first side surface S5 is concave, and its second side surface S6 is concave.

[0094] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0095] The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave.

[0096] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0097] An image plane IMA is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. A protective glass L7 is provided between the sixth lens L6 and the image plane IMA. The protective glass L7 has a first side surface S13 and a second side surface S14. Table 1 shows the basic parameters of the optical lens of Embodiment 1.

[0098] Table 1. Basic parameters of the optical lens in Example 1

[0099] Figure 15 In this context, T represents the meridian / tangential direction. From Figure 15 As can be seen, the optical lens of Example 1 achieves a peak MTF of over 0.6 in the 0° center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the 17.27° edge field of view at a spatial frequency of 119 lp / mm. It has good imaging quality in each field of view and achieves high imaging quality of eight million or even ten million pixels. Figure 16 The example illustrates the distortion values ​​of 436nm wavelength light under different fields of view of the optical lens of Example 1. Figure 16 The black dashed line in the middle represents the baseline where the distortion value is 0. From... Figure 16 As can be seen, the optical lens of Example 1 has less distortion at the edge of the field of view, which is beneficial to having a large angular resolution in each field of view and high imaging quality in each field of view. Figure 17 The example illustrates the relative illumination of the optical lens of Embodiment 1 in the Y-direction field of view. The Y-direction is the Y-axis direction of the optical lens's X, Y, and Z axes. From Figure 17 As can be seen, the optical lens of Example 1 can achieve a relative illumination of over 50% (i.e., 0.5) at the edge field of view, exhibiting strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 1 has good imaging quality.

[0100] Example 2 The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the first lens L1 has positive optical power; the second side surface S4 of the second lens L2 is concave; and the first side surface S7 of the fourth lens L4 is concave. Table 2 shows the basic parameters of the optical lens of Embodiment 2.

[0101] Table 2 Basic parameters of the optical lens in Example 2

[0102] The optical lens of Example 2 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 2 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 2 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 2 possesses excellent image quality.

[0103] Example 3 The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is concave. Table 3 shows the basic parameters of the optical lens of Embodiment 3.

[0104] Table 3. Basic parameters of the optical lens in Example 3

[0105] The optical lens of Example 3 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 3 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 3 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 3 possesses excellent image quality.

[0106] Example 4 The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S10 of the fifth lens L5 is a convex surface. Table 4 shows the basic parameters of the optical lens of Embodiment 4.

[0107] Table 4. Basic parameters of the optical lens in Example 4

[0108] The optical lens of Example 4 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 4 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 4 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 4 possesses excellent image quality.

[0109] Example 5 The following is for reference Figure 5 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the second side surface S10 of the fifth lens L5 is convex, while the second side surface S12 of the sixth lens L6 is concave. Table 5 shows the basic parameters of the optical lens of Embodiment 5.

[0110] Table 5. Basic parameters of the optical lens in Example 5

[0111] The optical lens of Example 5 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 5 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 5 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 5 possesses excellent image quality.

[0112] Example 6 The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 6 shows the basic parameters of the optical lens of Embodiment 6.

[0113] Table 6 Basic parameters of the optical lens in Example 6

[0114] The optical lens of Example 6 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 6 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 6 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 6 possesses excellent image quality.

[0115] Example 7 The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 7 shows the basic parameters of the optical lens of Embodiment 7.

[0116] Table 7 Basic parameters of the optical lens in Example 7

[0117] The optical lens of Example 7 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good imaging quality across all fields of view, achieving high imaging quality at the level of eight million or even ten million pixels. The optical lens of Example 7 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high imaging quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 7 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 7 possesses excellent imaging quality.

[0118] Example 8 The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 8 shows the basic parameters of the optical lens of Embodiment 8.

[0119] Table 8 Basic parameters of the optical lens in Example 8

[0120] The optical lens of Example 8 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 8 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 8 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 8 possesses excellent image quality.

[0121] Example 9 The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 9 shows the basic parameters of the optical lens of Embodiment 9.

[0122] Table 9. Basic parameters of the optical lens in Example 9

[0123] The optical lens of Example 9 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good imaging quality across all fields of view, achieving high imaging quality at the level of eight million or even ten million pixels. The optical lens of Example 9 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high imaging quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 9 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 9 possesses excellent imaging quality.

[0124] Example 10 The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is concave. Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0125] Table 10 Basic parameters of the optical lens in Example 10

[0126] The optical lens of Example 10 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 10 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 10 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 10 possesses excellent image quality.

[0127] Example 11 The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is concave. Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0128] Table 11 Basic parameters of the optical lens in Example 11

[0129] The optical lens of Example 11 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good imaging quality across all fields of view, achieving high imaging quality at the level of eight million or even ten million pixels. The optical lens of Example 11 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high imaging quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 11 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 11 possesses excellent imaging quality.

[0130] Example 12 The following is for reference Figure 12 Describes an optical lens according to Embodiment 12 of this application. For example... Figure 12 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different. Table 12 shows the basic parameters of the optical lens of Embodiment 12.

[0131] Table 12 Basic parameters of the optical lens in Example 12

[0132] The optical lens of Example 12 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 12 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 12 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 12 possesses excellent image quality.

[0133] Example 13 The following is for reference Figure 13 Describes an optical lens according to Embodiment 13 of this application. For example... Figure 13 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; and a filter L8 is provided between the sixth lens L6 and the protective glass L7; the filter L8 has a first side surface S15 and a second side surface S16. Table 13 shows the basic parameters of the optical lens of Embodiment 13.

[0134] Table 13 Basic parameters of the optical lens in Example 13

[0135] The optical lens of Example 13 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 13 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 13 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 13 possesses excellent image quality.

[0136] Example 14 The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 14 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the central radius of curvature and lens thickness of each lens surface are different; the first side surface S7 of the fourth lens L4 is concave; the second side surface S10 of the fifth lens L5 is convex; and the second side surface S12 of the sixth lens L6 is concave. Table 14 shows the basic parameters of the optical lens of Embodiment 14.

[0137] Table 14 Basic parameters of the optical lens in Example 14

[0138] The optical lens of Example 14 achieves a peak MTF of over 0.6 in the center field of view, over 0.4 in the 12.01° field of view, and over 0.2 in the edge field of view at a spatial frequency of 119 lp / mm. This results in good image quality across all fields of view, achieving high image quality at the level of eight million or even ten million pixels. The optical lens of Example 14 exhibits less distortion in the edge field of view, which is beneficial for having a large angular resolution and high image quality in all fields of view. Furthermore, the relative illumination of the optical lens of Example 14 can reach over 50% in the edge field of view, resulting in strong brightness uniformity and more uniform and clear imaging across all fields of view. Therefore, the optical lens provided in Example 14 possesses excellent image quality.

[0139] Tables 15-1 and 15-2 provide the basic parameters of the optical lenses in Examples 1-14, such as F, FNO, ENPD, TTL, DFOV, θ, H, BFL, DST, DMAX, D11, D12, D21, D22, D31, D32, D41, D42, D51, D52, D61, D62, SAG12, SAG21, SAG42, SAG51, and FR51. Wherein, D12 is the maximum light-transmitting aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, D21 is the maximum light-transmitting aperture of the first side of the second lens corresponding to the maximum field of view of the optical lens, D22 is the maximum light-transmitting aperture of the second side of the second lens corresponding to the maximum field of view of the optical lens, D31 is the maximum light-transmitting aperture of the first side of the third lens corresponding to the maximum field of view of the optical lens, D32 is the maximum light-transmitting aperture of the second side of the third lens corresponding to the maximum field of view of the optical lens, D41 is the maximum light-transmitting aperture of the first side of the fourth lens corresponding to the maximum field of view of the optical lens, D51 is the maximum light-transmitting aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D52 is the maximum light-transmitting aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, D61 is the maximum light-transmitting aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, and D62 is the maximum light-transmitting aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens.

[0140] Table 15-1 Basic parameters of the optical lenses in Examples 1-7

[0141] Table 15-2 Basic parameters of the optical lenses in Examples 8-14

[0142] In summary, the relationships in each embodiment of Examples 1-14 satisfy the relationships shown in Tables 16-1 and 16-2.

[0143] Table 16-1 Relationships in Examples 1-7

[0144] Table 16-2 Relationships in Examples 8-14

[0145] This application also provides an electronic device, including a first device and / or a second device. The first device may be, for example, a lidar transmitter, and the second device may be, for example, a lidar receiver. The first device may include the optical lens and light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device may include the optical lens as described in the exemplary embodiments above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element is disposed on the second side of the optical lens (e.g., disposed on the imaging surface), and the imaging element may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0146] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with optical power has a first concave side and a second convex side; A second lens with positive optical power has a convex first side surface; A third lens with negative optical power has a concave first side and a concave second side. The fourth lens has positive optical power, and its second side surface is convex. The fifth lens with positive optical power has a convex first side surface; The sixth lens, which has negative optical power, has a concave first side surface; The optical lens has six lenses with optical power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all all-glass spherical lenses; The optical lens satisfies the following relationships: 1.4≤F / ENPD≤1.75, 1.5≤TTL / F≤2.65, -0.85≤F3 / F≤-0.4 and -1≤R11 / F≤-0.35; Wherein, F is the focal length of the entire optical lens group, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, F3 is the focal length of the third lens, and R11 is the center radius of curvature of the first side surface of the first lens.

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

3. The optical lens according to any one of claims 1 to 2, characterized in that, The total optical length (TTL) of the optical lens satisfies: 25 ≤ TTL / 1mm ≤ 38.

4. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F of the entire optical lens assembly and the image height H corresponding to the maximum field of view of the optical lens satisfy: 1.3≤F / H≤2.

2.

5. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F of the entire optical lens assembly and the focal length F1 of the first lens satisfy the following condition: 0 < |F / F1| ≤ 0.

24.

6. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F5 of the fifth lens satisfies the following condition with respect to the focal length F of the entire optical lens group: 0.6≤F5 / F≤1.

3.

7. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F6 of the sixth lens satisfies the following condition with respect to the focal length F of the entire optical lens group: -1.6≤F6 / F≤-0.

65.

8. The optical lens according to any one of claims 1 to 2, characterized in that, The focal length F4 of the fourth lens satisfies the following condition with respect to the focal length F of the entire optical lens group: 1.5≤F4 / F≤1.

85.

9. The optical lens according to any one of claims 1 to 2, characterized in that, The air gap T12 between the first lens and the second lens, the center curvature radius R12 of the second side of the first lens and the center curvature radius R21 of the first side of the second lens satisfy: 0.65≤(T12-R12) / R21≤1.

3.

10. The optical lens according to any one of claims 1 to 2, characterized in that, The air gap T56 between the fifth lens and the sixth lens satisfies the following condition with respect to the center curvature radius R61 of the first side surface of the sixth lens: -1.25≤T56 / R61≤-0.

18.

11. The optical lens according to any one of claims 1 to 2, characterized in that, The sag of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, SAG51, and the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, SAG42, satisfy the following: -6≤SAG51 / SAG42≤-1.

85.

12. The optical lens according to any one of claims 1 to 2, characterized in that, The central curvature radius R31 of the first side surface of the third lens, the central curvature radius R32 of the second side surface of the third lens, and the central thickness CT3 of the third lens satisfy the following condition: -2.2≤R31 / (R32-CT3)≤-0.

7.

13. The optical lens according to any one of claims 1 to 2, characterized in that, The center thickness CT6 of the sixth lens and the focal length F of the entire optical lens group satisfy the following condition: 0.03≤CT6 / F≤0.

13.

14. The optical lens according to any one of claims 1 to 2, characterized in that, The center thickness CT6 of the sixth lens and the optical back focal length BFL of the optical lens satisfy the following condition: 0.11≤CT6 / BFL≤0.

55.

15. The optical lens according to any one of claims 1 to 2, characterized in that, The maximum field of view (DFOV) of the optical lens satisfies: 25 ≤ DFOV / 1° ≤ 45.

16. The optical lens according to any one of claims 1 to 2, characterized in that, The central radius of curvature R11 of the first side surface of the first lens, the central thickness CT1 of the first lens, and the central radius of curvature R12 of the second side surface of the first lens satisfy: 0.65≤R11 / (CT1+R12)≤1.

7.

17. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following relationships: 52≤(DFOV×F) / H / 1°≤65, 0.065≤TTL / H / DFOV×1°≤0.15, 2.3≤TTL / DMAX≤3.3, 0.75≤(F×θ) / D11 / 1 rad≤1.1, 0.02≤D11 / H / DFOV×1°≤0.05, 0.06≤BFL / TTL≤0.18, 0.5≤DST / F≤0.8, 0<|(HF×θ) / (F×θ) |×(1mm×1rad) / (1mm-1mm×1rad)≤0.045, 0.85≤(H / 2) / (F×tan(θ / 2))≤1.1, 0.6≤F2 / F≤1.8, 0.3≤FR51 / F≤0.7, 1.58≤F4 / F≤1.65, -1.65≤SAG12 / SAG21≤-0.65 or -0.165≤SAG42 / (D42 / 2)≤-0.045; Wherein, DFOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, DST is the effective aperture of the aperture stop, FR51 is the image-side focal length of the first side of the fifth lens, F4 is the focal length of the fourth lens, SAG12 is the sag of the second side of the first lens corresponding to the maximum field of view of the optical lens, SAG21 is the sag of the first side of the second lens corresponding to the maximum field of view of the optical lens, SAG42 is the sag of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, and D42 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens.

18. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following relationships: 56.842≤(DFOV×F) / H / 1°≤59.185, 1.779≤TTL / F≤2.376, 0.085≤TTL / H / DFOV×1°≤0.123, 2.515≤TTL / DMAX≤3.108, 0.805≤(F×θ) / D11 / 1rad≤0.956, 0.027≤D11 / H / DFOV×1°≤0.043, 0.071≤BFL / TTL≤0.168, 1.451≤F / H≤1.984, 1.4≤F / ENPD≤1.7, 0.607≤DST / F≤0.745, 0.002≤|(H-F×θ) / (F×θ)|×(1mm×1rad) / (1mm-1mm×1rad)≤0.032, 0.934≤(H / 2) / (F×tan(θ / 2))≤0.987, 0.027≤|F / F1|≤0.203, 0.785≤F2 / F≤1.545, -0.817≤F3 / F≤-0.521, 1.6≤F4 / F≤1.605, 0.763≤F5 / F≤1.067, -1.234≤F6 / F≤-0.814, -0.795≤R11 / F≤-0.643, 0.787≤(T12-R12) / R21≤1.179, -1.058≤T56 / R61≤-0.237, -5.351≤SAG51 / SAG42≤-2.353, -1.911≤R31 / (R32-CT3)≤-0.85, 0.495≤FR51 / F≤0.584, 0.044≤CT6 / F≤0.097, -1.415≤SAG12 / SAG21≤-0.808, 0.127≤CT6 / BFL≤0.506, -0.141≤SAG42 / (D42 / 2)≤-0.061, 0.849≤R11 / (CT1+R12)≤1.35, 29.0006≤TTL / 1mm≤35.0001 or 28.6459≤DFOV / 1°≤40.514; Wherein, DFOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, DMAX is the maximum value among the maximum apertures of each lens corresponding to the maximum field of view of the optical lens, D11 is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, DST is the effective aperture of the aperture stop, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, F4 is the focal length of the fourth lens, T12 is the air gap between the first lens and the second lens, R12 is the central radius of curvature of the second side of the first lens, R21 is the central radius of curvature of the first side of the second lens, and T56 is the air gap between the fifth lens and the sixth lens. R61 is the center radius of curvature of the first side of the sixth lens, SAG51 is the sagitta of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, SAG42 is the sagitta of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, R31 is the center radius of curvature of the first side of the third lens, R32 is the center radius of curvature of the second side of the third lens, CT3 is the center thickness of the third lens, FR51 is the image-side focal length of the first side of the fifth lens, CT6 is the center thickness of the sixth lens, SAG12 is the sagitta of the second side of the first lens corresponding to the maximum field of view of the optical lens, SAG21 is the sagitta of the first side of the second lens corresponding to the maximum field of view of the optical lens, D42 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, and CT1 is the center thickness of the first lens.

19. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 18; as well as At least one of an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

Images