Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side along an optical axis: a first lens with positive refractive power, the first side of the first lens being a convex surface, and the second side of the first lens being a concave surface; a second lens with negative refractive power, the first side of the second lens being a concave surface, and the second side of the second lens being a concave surface; a third lens with positive refractive power, the first side of the third lens being a convex surface, and the second side of the third lens being a convex surface; a fourth lens with refractive power; a fifth lens with refractive power, the sign of the refractive power of the fifth lens being opposite to that of the fourth lens; and a sixth lens with refractive power; wherein the number of lenses with refractive power in the optical lens is six; and the optical lens satisfies: 3≤F1 / F≤10.

Description

Technical Field

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

[0002] In recent years, with the continuous development of automotive intelligence and autonomous driving technologies, the market for automotive lenses has continued to grow. In the coming years, the number of automotive lenses will increase significantly to meet higher levels of autonomous driving functions and safety requirements. Automotive lenses refer to optical lenses installed on automobiles to achieve various functions. These lenses can include, for example, interior lenses, rearview lenses, front-view lenses, side-view lenses, and surround-view lenses. Among these, front-view and side-view lenses are key components for realizing ADAS (Advanced Driving Assistance Systems) and autonomous driving functions, and the market demand is particularly strong.

[0003] Forward-looking and side-looking cameras need to detect objects at medium to long distances, but medium to long distance imaging requires a longer focal length of the lens. However, long focal lengths are often accompanied by a reduction in the field of view (the field of view is generally around 30°), which leads to a smaller detection range and is not conducive to the development of autonomous driving. At the same time, a longer focal length will also result in a larger lens size, which is not conducive to the miniaturization of the lens.

[0004] Furthermore, due to the complexity of actual road detection scenarios, lenses need to have excellent object recognition capabilities, thus requiring high image quality. To adapt to a wider range of application scenarios, high resolution has become an urgent need. To meet these higher image quality requirements, more lens structures are often chosen, but this severely impacts lens miniaturization. While meeting the imaging requirements of automotive lenses, smaller lenses facilitate installation, but this creates a contradiction between high resolution and miniaturization in ordinary automotive lenses. Summary of the Invention

[0005] Considering the following problems with existing automotive lenses: they cannot simultaneously meet the requirements of high resolution and miniaturization; they cannot simultaneously meet the requirements of telephoto lenses with a large field of view. To address at least one of these problems, some embodiments of this application provide an optical lens and electronic device.

[0006] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having positive optical power, wherein a first side surface of the first lens is convex and a second side surface of the first lens is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave and a second side surface of the second lens is concave; a third lens having positive optical power, wherein a first side surface of the third lens is convex and a second side surface of the third lens is convex; a fourth lens having optical power; a fifth lens having optical power, wherein the sign of the optical power of the fifth lens is opposite to that of the fourth lens; and a sixth lens having optical power; wherein the number of lenses having optical power in the optical lens is six; and the optical lens satisfies: 3≤F1 / F≤10; wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens.

[0007] With this configuration, the optical lens of this application employs six lenses with optical power. Light from the first side first enters through the first side of the first lens and then exits through the second side of the first lens. The first lens has positive optical power, with its first side being convex and its second side being concave. This effectively converges light, preventing excessive divergence of object-side light, and thus maximizing the collection of light from a wide field of view into the rear optical system. While ensuring a large amount of light enters, this also helps improve the overall light transmission and illumination of the lens. Simultaneously, by controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens (i.e., 3≤F1 / F≤10), the effective focal length of the first lens and the total effective focal length of the optical lens are kept within a reasonable range, which is beneficial for collecting light from a wide field of view into the rear optical system and achieving telephoto capabilities. Furthermore, if the effective focal length of the first lens is not too large, it is beneficial for light convergence, achieving a wide field of view and a small aperture. If the effective focal length of the first lens is not too small, it is beneficial for controlling the rear light, achieving high resolution and a large image plane. The diverging light rays exiting the first lens enter the second lens: The second lens has negative optical power, with both its first and second sides being concave. This divergence disperses the central and peripheral rays from each field of view, increasing the aperture of the rear light source and enhancing system illumination. Simultaneously, the double-concave structure of the second lens further enhances light divergence, facilitating the correction of aberrations between peripheral and central rays, achieving high resolution. Under the same viewing angle, the light rays exiting from the second side of the second lens provide a larger light-receiving surface for the subsequent optical system, resulting in greater light intake and increased image brightness. The light rays exiting the second lens enter the third lens: The third lens has positive optical power, with both its first and second sides being convex. This allows for rapid convergence of the diverging light rays, altering their trajectory and bringing them closer to the optical axis. It is a crucial turning point in this architecture, facilitating smooth entry of light into the subsequent optical system, reducing the rear aperture, and improving resolution. Light rays exiting the third lens enter the fourth and fifth lenses: the fourth and fifth lenses have optical powers with opposite signs, which facilitates smooth light transition and improves image resolution. Light rays exiting the fifth lens, after entering the sixth lens, can smoothly reach the imaging plane, achieving high resolution.

[0008] According to an exemplary embodiment of this application, the fourth lens has positive optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex.

[0009] According to an exemplary embodiment of this application, the fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave.

[0010] According to an exemplary embodiment of this application, the fifth lens has negative optical power, the first side of the fifth lens is concave, and the second side of the fifth lens is either concave or convex.

[0011] According to an exemplary embodiment of this application, the fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex.

[0012] According to an exemplary embodiment of this application, the sixth lens has positive or negative optical power.

[0013] According to an exemplary embodiment of this application, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is either concave or convex.

[0014] According to an exemplary embodiment of this application, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is either a convex surface or a concave surface.

[0015] According to an exemplary embodiment of this application, the fourth lens and the fifth lens are glued together.

[0016] According to an exemplary embodiment of this application, the optical lens further includes an aperture stop located between the second lens and the third lens.

[0017] According to an exemplary embodiment of this application, all lenses in the optical lens are spherical glass lenses.

[0018] According to an exemplary embodiment of this application, the optical lens satisfies: 2≤TTL / F≤4.5; where TTL is the total optical length of the optical lens and F is the total effective focal length of the optical lens.

[0019] According to an exemplary embodiment of this application, the optical lens satisfies: 0.03≤|(HF×θ) / (F×θ)|≤0.1; where 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, and F is the total effective focal length of the optical lens.

[0020] According to an exemplary embodiment of this application, the optical lens satisfies: 5° / mm ≤ FOV / H ≤ 7.5° / mm; where FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0021] According to an exemplary embodiment of this application, the optical lens satisfies: -1≤F2 / F≤-0.2; where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens.

[0022] According to an exemplary embodiment of this application, the optical lens satisfies: 0.2≤F3 / F≤2; where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens.

[0023] According to an exemplary embodiment of this application, the combined focal length of the fourth lens and the fifth lens is a positive value.

[0024] According to an exemplary embodiment of this application, the optical lens satisfies: -2≤(1 / F1+1 / F2) / (1 / F)≤-0.5; where F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens.

[0025] According to an exemplary embodiment of this application, the optical lens satisfies: 0.05≤R11 / F1≤0.45; where R11 is the radius of curvature of the first side surface of the first lens, and F1 is the effective focal length of the first lens.

[0026] According to an exemplary embodiment of this application, the optical lens satisfies: 0.05≤R12 / F1≤0.7; where R12 is the radius of curvature of the second side surface of the first lens, and F1 is the effective focal length of the first lens.

[0027] According to an exemplary embodiment of this application, the optical lens satisfies: -2≤R31 / R32≤-0.3; where R31 is the radius of curvature of the first side surface of the third lens, and R32 is the radius of curvature of the second side surface of the third lens.

[0028] According to an exemplary embodiment of this application, the optical lens satisfies: 0.5≤R31 / F≤2.5; where R31 is the radius of curvature of the first side of the third lens, and F is the total effective focal length of the optical lens.

[0029] According to an exemplary embodiment of this application, the optical lens satisfies: 0.5≤R41 / F≤2; where R41 is the radius of curvature of the first side surface of the fourth lens, and F is the total effective focal length of the optical lens.

[0030] According to an exemplary embodiment of this application, the optical lens satisfies: 2≤R12 / d12≤18; where R12 is the radius of curvature of the second side surface of the first lens, and d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens.

[0031] According to an exemplary embodiment of this application, the optical lens satisfies: 0.1≤d3 / TTL≤0.25; where d3 is the center thickness of the third lens on the optical axis, and TTL is the total optical length of the optical lens.

[0032] According to an exemplary embodiment of this application, the optical lens satisfies: 0.3≤d3 / F3≤0.9; where d3 is the center thickness of the third lens on the optical axis and F3 is the effective focal length of the third lens.

[0033] According to an exemplary embodiment of this application, the optical lens satisfies: 0.7≤D62 / H≤1.3; where D62 is the aperture diameter on the second side of the sixth lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0034] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 3≤D11 / H / FOV×180°≤7, 0.03≤BFL / TTL≤0.35, 55°≤FOV×F / H≤70°, 13≤TTL / H / FOV×180°≤17, 0.8≤F / H≤1.8, 0.2≤|F4 / F|≤2.5, 0.1≤|F5 / F|≤5, 0.2≤|F6 / F|≤25, -3≤Fpositive / Fnegative <0, -12≤F1 / F2≤- 3. 0.5≤R11 / D11≤2, 0.5≤R12 / R11≤2.5, -2.5≤R21 / R22≤-0.3, 0.2≤(d1+d12+d2+d23) / TL≤0.5, and 0.1≤(d4+d5) / TL≤0.6; where D11 is the aperture diameter on the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, and TTL is the optical... The total optical length of the lens; F is the total effective focal length of the optical lens; F4 is the effective focal length of the fourth lens; F5 is the effective focal length of the fifth lens; F6 is the effective focal length of the sixth lens; F is the effective focal length of the positive lens in the fourth and fifth lenses; F-negative is the effective focal length of the negative lens in the fourth and fifth lenses; F1 is the effective focal length of the first lens; F2 is the effective focal length of the second lens; R11 is the radius of curvature of the first side surface of the first lens; R12 is the radius of curvature of the second side surface of the first lens; R21 is the curvature of the first side surface of the second lens. Radius, R22 is the radius of curvature of the second side surface of the second lens, d1 is the center thickness of the first lens on the optical axis, d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens, d2 is the center thickness of the second lens on the optical axis, d23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens, TL is the center distance on the optical axis from the first side surface of the first lens to the second side surface of the sixth lens in the optical lens, d4 is the center thickness of the fourth lens on the optical axis, and d5 is the center thickness of the fifth lens on the optical axis.

[0035] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 2.8≤TTL / F≤3.4, 4≤D11 / H / FOV×180°≤6, 0.035≤|(HF×θ) / (F×θ)|≤0.09, 0.05≤BFL / TTL≤0.3, 58°≤FOV×F / H≤65°, 6° / mm≤FOV / H≤7° / mm, 14≤TTL / H / FOV×180°≤16.7, 1.2≤F / H≤1.4, 3.5≤F1 / F≤8.5, -0.8≤F2 / F≤-0.5, 0.5≤F3 / F≤1.5, 0.3≤|F4 / F|≤2.2, 0.2≤|F5 / F|≤4.5, 0.5≤|F6 / F|≤20, 0.5≤F45 / F≤800, -2≤ Fpositive / Fnegative ≤ -0.1, -11 ≤ F1 / F2 ≤ -4, -1.65 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -1, 0.85 ≤ R11 / D11 ≤ 1.6, 0.1 ≤ R11 / F1 ≤ 0.4, 0.08 ≤ R12 / F1 ≤ 0.6, 1 < R12 / R11 ≤ 1.6, -2 ≤ R21 / R22 ≤ -0.5, -1.4 ≤ R31 / R3 2≤-0.45, 0.8≤R31 / F≤1.9, 0.7≤R41 / F≤1.7, 2.5≤R12 / d12≤16, 0.15≤d3 / TTL≤0.2, 0.4≤d3 / F3≤0.8, 0.22≤(d1+d12+d2+d23) / TL≤0.4, 0.2≤(d4+d5) / TL≤0.5, and 0.85≤D62 / H≤1.1; where TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, D11 is the aperture diameter on the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F45 is the combined focal length of the fourth and fifth lenses, F is the effective focal length of the positive lens in the fourth and fifth lenses, F-negative is the effective focal length of the negative lens in the fourth and fifth lenses, R11 is the radius of curvature of the first side of the first lens, and R12 is the radius of curvature of the second side of the first lens. R21 is the radius of curvature of the first side surface of the second lens, R22 is the radius of curvature of the second side surface of the second lens, R31 is the radius of curvature of the first side surface of the third lens, R32 is the radius of curvature of the second side surface of the third lens, R41 is the radius of curvature of the first side surface of the fourth lens, d12 is the axial distance between the second side surfaces of the first and third lenses, d3 is the center thickness of the third lens on the optical axis, d1 is the center thickness of the first lens on the optical axis, d2 is the center thickness of the second lens on the optical axis, d23 is the axial distance between the second side surface of the second lens and the first side surface of the third lens, TL is the center distance on the optical axis between the first side surface of the first lens and the second side surface of the sixth lens in the optical lens, d4 is the center thickness of the fourth lens on the optical axis, d5 is the center thickness of the fifth lens on the optical axis, and D62 is the aperture diameter on the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens.

[0036] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.6≤F3 / F≤1.25, 0.7≤|F6 / F|≤18, 0.153≤d3 / TTL≤0.195, and 0.88≤D62 / H≤1.06; where F3 is the effective focal length of the third lens, F is the total effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, d3 is the center thickness of the third lens on the optical axis, TTL is the total optical length of the optical lens, D62 is the aperture of the second side of the sixth lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0037] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 2.912≤TTL / F≤3.259, 4.341≤D11 / H / FOV×180°≤5.607, 0.047≤|(HF×θ) / (F×θ)|≤0.08, 0.079≤BFL / TTL≤0.233, 60.091°≤FOV×F / H≤62.291°, 6.378° / mm≤FOV / H≤6.491° / mm , 14.48≤TTL / H / FOV×180°≤16.151, 1.273≤F / H≤1.32, 3.855≤F1 / F≤6.857, -0.741≤F2 / F≤-0.585, 0.759≤F 3 / F≤1.16, 0.506≤|F4 / F|≤1.686, 0.349≤|F5 / F|≤3.295, 0.939≤|F6 / F|≤11.862, 0.97≤F45 / F≤585.845, - 1.452≤Fpositive / Fnegative≤-0.183, -9.819≤F1 / F2≤-5.334, -1.498≤(1 / F1+1 / F2) / (1 / F)≤-1.11, 0.973≤R11 / D11≤1.418, 0.166≤R11 / F1≤0.34, 0.188≤R12 / F1≤0.501, 1.13<R12 / R11≤1.476, -1.824≤R21 / R22≤-0.795, -1.2≤R 31 / R32≤-0.626, 1.099≤R31 / F≤1.717, 0.83≤R41 / F≤1.483, 3.895≤R12 / d12≤12.512, 0.161≤d3 / TTL≤0.186, 0.451≤d3 / F3≤0.699, 0.252≤(d1+d12+d2+d23) / TL≤0.366, 0.226≤(d4+d5) / TL≤0.41, and 0.915≤D62 / H≤1.029; where TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, D11 is the aperture diameter on the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F45 is the combined focal length of the fourth and fifth lenses, F is the effective focal length of the positive lens in the fourth and fifth lenses, F-negative is the effective focal length of the negative lens in the fourth and fifth lenses, R11 is the radius of curvature of the first side of the first lens, and R12 is the radius of curvature of the second side of the first lens. R21 is the radius of curvature of the first side surface of the second lens, R22 is the radius of curvature of the second side surface of the second lens, R31 is the radius of curvature of the first side surface of the third lens, R32 is the radius of curvature of the second side surface of the third lens, R41 is the radius of curvature of the first side surface of the fourth lens, d12 is the axial distance between the second side surfaces of the first and third lenses, d3 is the center thickness of the third lens on the optical axis, d1 is the center thickness of the first lens on the optical axis, d2 is the center thickness of the second lens on the optical axis, d23 is the axial distance between the second side surface of the second lens and the first side surface of the third lens, TL is the center distance on the optical axis between the first side surface of the first lens and the second side surface of the sixth lens in the optical lens, d4 is the center thickness of the fourth lens on the optical axis, d5 is the center thickness of the fifth lens on the optical axis, and D62 is the aperture diameter on the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens.

[0038] 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.

[0039] A third aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having positive optical power, wherein a first side surface of the first lens is convex and a second side surface of the first lens is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave and a second side surface of the second lens is concave; a third lens having positive optical power, wherein a first side surface of the third lens is convex and a second side surface of the third lens is convex; a fourth lens having optical power; and a fifth lens having optical power, wherein the sign of the optical power of the fifth lens is opposite to that of the fourth lens; and a lens having optical power... The sixth lens; wherein the number of lenses with optical power in the optical lens is six; the optical lens satisfies one or more of the following relationships: 3≤F1 / F≤10, 0.05≤R11 / F1≤0.45, 0.05≤R12 / F1≤0.7 and 5° / mm≤FOV / H≤7.5° / mm; wherein F1 is the effective focal length of the first lens, F is the total effective focal length of the optical lens, R11 is the radius of curvature of the first side of the first lens, R12 is the radius of curvature of the second side of the first lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0040] With this configuration, the optical lens of this application employs six lenses with optical power. Light from the first side first enters through the first side of the first lens and then exits through the second side of the first lens. The first lens has positive optical power, with its first side being convex and its second side being concave. This effectively converges light, preventing excessive divergence of object-side light, and thus maximizing the collection of light from a wide field of view into the rear optical system. While ensuring a large amount of light enters, this also helps improve the overall light transmission and illumination of the lens. Simultaneously, by controlling the effective focal length and / or the radii of curvature on both sides of the first lens in relation to the total effective focal length of the optical lens (i.e., 3≤F1 / F≤10, 0.05≤R11 / F1≤0.45, and / or 0.05≤R12 / F1≤0.7), the focal length and radii of curvature on both sides of the first lens are rationally set, which helps to better collect light from a wide field of view, achieving a small aperture at the front end while satisfying the requirements for telephoto. At the same time, light can smoothly enter the second lens, which is beneficial for the control of rear light and further achieves high resolution. The diverging light rays exiting the first lens enter the second lens: The second lens has negative optical power, with both its first and second sides being concave. This divergence disperses the central and peripheral rays from each field of view, increasing the aperture of the rear light source and enhancing system illumination. Simultaneously, the double-concave structure of the second lens further enhances light divergence, facilitating the correction of aberrations between peripheral and central rays, achieving high resolution. Under the same viewing angle, the light rays exiting from the second side of the second lens provide a larger light-receiving surface for the subsequent optical system, resulting in greater light intake and increased image brightness. The light rays exiting the second lens enter the third lens: The third lens has positive optical power, with both its first and second sides being convex. This allows for rapid convergence of the diverging light rays, altering their trajectory and bringing them closer to the optical axis. It is a crucial turning point in this architecture, facilitating smooth entry of light into the subsequent optical system, reducing the rear aperture, and improving resolution. Light rays exiting the third lens enter the fourth and fifth lenses: the fourth and fifth lenses have optical powers with opposite signs, which facilitates smooth light transition and improves image resolution. Light rays exiting the fifth lens can smoothly reach the imaging plane after entering the sixth lens, achieving high resolution. At the same time, by controlling the maximum field of view and its corresponding image height of the optical lens, i.e., 5° / mm ≤ FOV / H ≤ 7.5° / mm, reasonable control of the maximum field of view and its corresponding image height of the optical lens is beneficial for achieving a large field of view while also accommodating a large image plane.

[0041] A fourth aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having positive optical power, wherein a first side surface of the first lens is convex and a second side surface of the first lens is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave and a second side surface of the second lens is concave; a third lens having positive optical power, wherein a first side surface of the third lens is convex and a second side surface of the third lens is convex; a fourth lens having optical power; and a fifth lens having optical power, wherein the fifth lens... The optical power of the third lens and the fourth lens have opposite signs; and the sixth lens has optical power; wherein the number of lenses with optical power in the optical lens is six; the optical lens satisfies one or more of the following relationships: -2≤R31 / R32≤-0.3, 0.5≤R31 / F≤2.5 and 0.2≤F3 / F≤2; wherein R31 is the radius of curvature of the first side of the third lens, R32 is the radius of curvature of the second side of the third lens, F is the total effective focal length of the optical lens, and F3 is the effective focal length of the third lens.

[0042] With this configuration, the optical lens of this application employs six lenses with optical power. Light from the first side first enters through the first side of the first lens and then exits through the second side of the first lens. The first lens has positive optical power, with a convex first side and a concave second side, effectively converging light and preventing excessive divergence of object-side light. This allows for the collection of light from a large field of view into the subsequent optical system, ensuring a large amount of light enters while also improving the overall light transmission and illumination of the lens. The diverging light exiting the first lens enters the second lens. The second lens has negative optical power, with both a concave first and second side, which diverges light, separating the central and peripheral light rays from each field of view, expanding the aperture of the subsequent light source, and increasing the system illumination. Simultaneously, the double-concave structure of the second lens further enhances light divergence, facilitating the correction of aberrations between peripheral and central light rays, achieving high resolution. Under the same viewing angle, the light exiting through the second side of the second lens provides a larger light-receiving surface for the subsequent optical system, resulting in a greater amount of light entering and increasing image brightness. The light rays emitted from the second lens enter the third lens: The third lens has positive optical power, and its first and second sides are convex. It can quickly converge light rays that are diverging in front, changing the direction of the light rays and bringing them closer to the optical axis. It is a key light turning point in this architecture, which is conducive to the smooth entry of light rays into the rear optical system, reducing the rear aperture and improving the resolution quality. At the same time, by controlling the relationship between the curvature radius of the two sides of the third lens and / or the effective focal length and the total effective focal length of the optical lens, i.e., -2≤R31 / R32≤-0.3, 0.5≤R31 / F≤2.5 and / or 0.2≤F3 / F≤2, the focal length of the third lens is made positive and small, which can quickly converge the light rays, and / or by reasonably setting the curvature radius of the two sides of the third lens, the light rays can be reasonably transitioned, which helps the system reduce sensitivity and achieve high resolution while miniaturizing. Light rays exiting the third lens enter the fourth and fifth lenses: the fourth and fifth lenses have optical powers with opposite signs, which facilitates smooth light transition and improves image resolution. Light rays exiting the fifth lens, after entering the sixth lens, can smoothly reach the imaging plane, achieving high resolution.

[0043] A fifth aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having positive optical power, wherein a first side surface of the first lens is convex and a second side surface of the first lens is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave and a second side surface of the second lens is concave; a third lens having positive optical power, wherein a first side surface of the third lens is convex and a second side surface of the third lens is convex; a fourth lens having optical power; a fifth lens having optical power, wherein the sign of the optical power of the fifth lens is opposite to that of the fourth lens; and a sixth lens having optical power; wherein the number of lenses having optical power in the optical lens is six; and the optical lens satisfies one or more of the following relationships: 0.2≤F3 / F≤2, 0.3≤d3 / F3≤0.9, and 0.1≤d3 / TTL≤0.25; wherein d3 is the center thickness of the third lens along the optical axis, F3 is the effective focal length of the third lens, F is the total effective focal length of the optical lens, and TTL is the total optical length of the optical lens.

[0044] With this configuration, the optical lens of this application employs six lenses with optical power. Light from the first side first enters through the first side of the first lens and then exits through the second side of the first lens. The first lens has positive optical power, with a convex first side and a concave second side, effectively converging light and preventing excessive divergence of object-side light. This allows for the collection of light from a large field of view into the subsequent optical system, ensuring a large amount of light enters while also improving the overall light transmission and illumination of the lens. The diverging light exiting the first lens enters the second lens. The second lens has negative optical power, with both a concave first and second side, which diverges light, separating the central and peripheral light rays from each field of view, expanding the aperture of the subsequent light source, and increasing the system illumination. Simultaneously, the double-concave structure of the second lens further enhances light divergence, facilitating the correction of aberrations between peripheral and central light rays, achieving high resolution. Under the same viewing angle, the light exiting through the second side of the second lens provides a larger light-receiving surface for the subsequent optical system, resulting in a greater amount of light entering and increasing image brightness. The light rays emitted from the second lens enter the third lens: The third lens has positive optical power, and its first and second sides are convex. It can quickly converge the light rays that are diverging in front, changing the light trajectory and bringing the light closer to the optical axis. It is a key light turning point in this architecture, which is conducive to the smooth entry of light into the rear optical system, reducing the rear port diameter and improving the resolution quality. At the same time, by controlling the ratio of the center thickness of the third lens to the effective focal length of the third lens and / or the total optical length of the optical lens, namely 0.2≤F3 / F≤2, 0.3≤d3 / F3≤0.9 and / or 0.1≤d3 / TTL≤0.25, the focal length of the third lens is positive and small, which can quickly converge the light rays. By reasonably setting the center thickness of the third lens, it is beneficial to increase the optical path, smooth the light trajectory, reduce the system sensitivity, and achieve high resolution. At the same time, it can effectively converge the light rays in front, reduce the rear port diameter, reduce the TTL, and achieve miniaturization. Light rays exiting the third lens enter the fourth and fifth lenses: the fourth and fifth lenses have optical powers with opposite signs, which facilitates smooth light transition and improves image resolution. Light rays exiting the fifth lens, after entering the sixth lens, can smoothly reach the imaging plane, achieving high resolution. Attached Figure Description

[0045] 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.

[0046] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0047] Figure 2The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown.

[0048] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0049] Figure 4 The modulation transfer function curve of the optical lens according to Embodiment 2 of this application is shown;

[0050] Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0051] Figure 6 The modulation transfer function curve of the optical lens according to Embodiment 3 of this application is shown;

[0052] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown;

[0053] Figure 8 The modulation transfer function curve of the optical lens according to Embodiment 4 of this application is shown;

[0054] Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown;

[0055] Figure 10 The modulation transfer function curve of the optical lens according to Embodiment 5 of this application is shown;

[0056] Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown;

[0057] Figure 12 The modulation transfer function curve of the optical lens according to Embodiment 6 of this application is shown;

[0058] Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown;

[0059] Figure 14 The modulation transfer function curve of the optical lens according to Embodiment 7 of this application is shown;

[0060] Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown;

[0061] Figure 16 The modulation transfer function curve of the optical lens according to Embodiment 8 of this application is shown;

[0062] Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown;

[0063] Figure 18 The modulation transfer function curve of the optical lens according to Embodiment 9 of this application is shown;

[0064] Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown;

[0065] Figure 20 The modulation transfer function curve of the optical lens according to Embodiment 10 of this application is shown;

[0066] Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown;

[0067] Figure 22 The modulation transfer function curve of the optical lens according to Embodiment 11 of this application is shown;

[0068] Figure 23 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown;

[0069] Figure 24 The modulation transfer function curve of the optical lens according to Embodiment 12 of this application is shown;

[0070] Figure 25 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown;

[0071] Figure 26 The modulation transfer function curve of the optical lens according to Embodiment 13 of this application is shown;

[0072] Figure 27 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown;

[0073] Figure 28 The modulation transfer function curve of the optical lens according to Embodiment 14 of this application is shown;

[0074] Figure 29 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown;

[0075] Figure 30 The modulation transfer function curve of the optical lens according to Embodiment 15 of this application is shown. Detailed Implementation

[0076] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0077] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0078] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0079] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0080] It should also be understood that the terms "comprising," "including," and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0081] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense, unless expressly so specified herein.

[0082] 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.

[0083] The features, principles and other aspects of this application are described in detail below.

[0084] 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.

[0085] In an exemplary embodiment, the optical lens provided in this application can be used as a light receiving lens or a light emitting lens, wherein: the light receiving lens is generally used to collect light from the object-side space, and the collected light is used to form detection information, including but not limited to imaging, laser point clouds, etc.; the light emitting lens is generally used to transmit light from the light emitting unit to the object-side space, and the light transmitted to the object-side space can be divided into projection light for forming a projection image or detection light for detecting target information, etc., according to the function of the light.

[0086] It is understood that when the optical lens provided in this application is used as a light-receiving lens such as a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. A camera lens may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0087] In some possible implementations, the optical lens provided in this application can also simultaneously perform both light receiving and light transmitting functions. For example, the optical lens provided in this application is used in a lidar system with shared light and light paths, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application is used in a system integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0088] In an exemplary embodiment, the first lens may have positive optical power, with its first side surface being convex and its second side surface being concave. The first lens is a positive lens, effectively converging light and preventing excessive divergence of object-side light, thus maximizing the collection of light from a wide field of view into the rear optical system. The increased light intake also improves the overall light transmission and illumination of the lens. The convex design of the first side surface further facilitates the collection of light from a wide field of view into the rear optical system, and in practical applications (such as rain or snow), it helps water droplets slide off, reducing their impact on image quality. The concave design of the second side surface of the first lens allows large-angle light from the first side surface to diverge rapidly, which is beneficial for the rear optical system to correct aberrations in large-angle light, achieving high resolution.

[0089] In an exemplary embodiment, the second lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, concave. The second lens is a negative lens, which has a diverging effect on light, dispersing the central and peripheral rays in each field of view, expanding the aperture of the rear light source, and increasing the system illumination. Simultaneously, the biconcave structure of the second lens can also better diverge light, which is beneficial for correcting aberrations between peripheral and central rays, achieving high resolution. Furthermore, under the same viewing angle, the light emitted from the second side surface of the second lens allows the subsequent optical system to have a larger light-receiving surface, achieving a greater amount of light intake and increasing image brightness. The first side surface of the second lens is concave, which can be combined with the concave second side surface of the first lens, allowing the second lens to better receive forward light, resulting in a smoother light transition, reduced light sensitivity, improved resolution quality, and reduced light energy loss, thus increasing the illumination of the peripheral field of view. The second side surface of the second lens is concave, which can further diverge light, appropriately increasing the distance between peripheral rays and reducing distortion.

[0090] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may also be, for example, convex. The third lens is a positive lens, capable of rapidly converging light rays that are generally diverging in front, changing the light trajectory and bringing the light closer to the optical axis. It is a key light inflection point in this architecture, facilitating the smooth entry of light into the rear optical system, reducing the rear port diameter, and improving resolution quality. The first side surface of the third lens is convex, which has a converging effect on light, further reducing aberrations and contributing to high resolution, thus improving the resolving power of the optical system. The second side surface of the third lens is convex, causing the light rays in the edge field of view to continuously converge, which helps to reduce the rear port diameter, achieve miniaturization, and simultaneously ensures a smooth light trajectory at the rear end, allowing it to smoothly enter the fourth lens, reducing light sensitivity and improving resolution quality.

[0091] In an exemplary embodiment, the fourth lens may have positive or negative optical power, and its first side may be convex and its second side may be convex or concave.

[0092] In the first example, the fourth lens may have positive optical power, and its first side may be, for example, convex, and its second side may be, for example, convex. The fourth lens is a positive lens and has a biconvex shape, which further converges the light rays from the front into the rear optical system, which is beneficial for achieving miniaturization and high resolution at the rear end and improving the resolution quality of the optical system.

[0093] In the second example, the fourth lens may have negative optical power, and its first side may be, for example, convex, and its second side may be, for example, concave. The fourth lens is a positive lens and has a convex-concave shape, which can appropriately diverge the light rays converging in front, allowing the light rays to smoothly transition to the rear optical system and improve image quality.

[0094] In an exemplary embodiment, the fifth lens may have positive or negative optical power; however, the positive and negative optical power properties of the fifth lens are opposite to those of the fourth lens.

[0095] In the first example, the fifth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, concave. The fifth lens is a negative lens and is biconcave in shape, which can receive and diverge the light rays that are continuously converged by the third and fourth lenses, so as to separate the edge rays, improve the peripheral illumination, and achieve large image plane imaging; at the same time, it also helps to disperse the edge rays and achieve small distortion.

[0096] In the second example, the fifth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, convex. The fifth lens is a negative lens with a concave-convex shape, capable of receiving light rays that have been continuously converged by the third and fourth lenses and appropriately diverging them, resulting in smoother light emission, which helps improve aberrations and achieve high resolution.

[0097] In the third example, the fifth lens may have positive optical power, and its first side may be, for example, convex, and its second side may be, for example, convex. The fifth lens is a positive lens and has a biconvex shape, which can moderately converge light rays that smoothly transition in front, which is beneficial for achieving miniaturization of the rear end and high resolution, thereby improving the resolving power of the optical system.

[0098] It is worth noting that the fourth and fifth lenses are cemented together to form a cemented lens. In this way, although the light diverges after passing through the first and second lenses and then converges rapidly through the third lens, introducing a significant optical path difference and making it difficult to completely eliminate chromatic aberration, this application not only optimizes the optical power and surface shape of the first, second, and third lenses to allow light to enter the fourth lens more smoothly from the third lens, but also further improves chromatic aberration correction by setting the fourth and fifth lenses as cemented lenses. This allows for the full correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA (chief ray angle) while maintaining a compact structure.

[0099] Furthermore, the cementation of the fourth and fifth lenses effectively eliminates ghosting effects on the lens, ensuring high resolution while eliminating ghosting. It should be understood that cemented lenses, being negative lenses, have a higher refractive index (compared to positive lenses), allowing light to converge smoothly and effectively at the final point, ensuring a stable arrival at the image plane and reducing overall weight and cost. Cemented lenses also reduce light loss caused by reflections between lens elements, and the combination of high and low refractive indices facilitates a rapid transition of light from the front, increasing the aperture and light transmission. Cemented lenses also reduce the air gap between the two lenses, resulting in a more compact overall optical structure and reducing tolerance sensitivity issues such as overall eccentricity of lens units during assembly.

[0100] In an exemplary embodiment, the sixth lens may have positive or negative optical power.

[0101] In the first example, the sixth lens may have negative optical power, with its first side being, for example, convex and its second side being, for example, concave. The sixth lens is a negative lens, diverging the light rays emitted by the fourth and fifth lenses, further adjusting the divergence of the forward light rays, increasing the illumination of the peripheral field of view, and improving resolution. The convex design of the first side of the sixth lens results in a smaller angle of incidence, allowing more light to enter the optical system and achieving high throughput; it also facilitates the convergence of incident light rays transmitted through the forward optical system, enabling them to quickly reach the image plane and achieving a short total optical length (TTL). The concave design of the second side of the sixth lens diverges the light rays, allowing them to reach a higher imaging position and achieving large image plane imaging; simultaneously, the increased spacing between light rays further reduces distortion.

[0102] In the second example, the sixth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, concave. The sixth lens is a negative lens, diverging the light rays emitted by the fourth and fifth lenses, further adjusting the divergence of the forward light rays, increasing the illumination of the peripheral field of view, and improving resolution. The concave first side of the sixth lens can diverge the converging light rays in front, reducing optical path difference and improving image quality. The concave second side of the sixth lens can further effectively diverge the light rays, allowing them to reach a higher imaging position and achieving large image plane imaging; simultaneously, the increased spacing between the light rays further reduces distortion.

[0103] In the third example, the sixth lens may have negative optical power, and its first side may be, for example, concave, and its second side may be, for example, convex. The sixth lens is a negative lens, diverging the light rays emitted by the fourth and fifth lenses, further adjusting the divergence of the forward light rays, increasing the illumination of the peripheral field of view, and improving image quality. The sixth lens is a negative lens with a concave-convex shape. First, the concave first side diverges the forward light rays that tend to converge, allowing the light rays to reach a higher imaging position, achieving large image plane imaging and improving image quality. Then, the convex second side appropriately converges the light rays diverged by the first side, achieving both high resolution and a small rear aperture.

[0104] In the fourth example, the sixth lens may have positive optical power, with its first side being, for example, convex and its second side being, for example, concave. As a positive lens, the sixth lens can further converge and adjust the light rays from the front, bringing them closer to the imaging plane, achieving miniaturization, reducing light loss, and improving image quality. The convex design of the first side of the sixth lens results in a smaller angle of incidence, allowing more light to enter the optical system and achieving high throughput; it also facilitates the convergence of incident light rays transmitted by the front optical system, enabling them to quickly reach the image plane and facilitating a short time-to-live (TTL). The concave design of the second side of the sixth lens appropriately diverges the light rays converged by the first side, reducing the angle of incidence of light entering the chip, which helps improve illumination and image quality.

[0105] In the fifth example, the sixth lens may have positive optical power, with its first side being, for example, concave and its second side being, for example, convex. As a positive lens, the sixth lens can further converge and adjust the light rays from the front, bringing them closer to the imaging surface, achieving miniaturization, reducing light loss, and improving image quality. The sixth lens, being a positive lens with a concave-convex shape, firstly, uses its concave first side to better receive the light rays from the front, allowing for a smooth light transition, reducing system sensitivity, while appropriately diverging the light to improve edge illumination and reduce distortion; then, its convex second side appropriately converges the light rays diverged by the first side, facilitating the near-perpendicular arrival of the light at the chip, helping to reduce CRA and improve image quality.

[0106] In the sixth example, the sixth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The sixth lens is a positive lens, capable of further converging and adjusting the light rays in front, bringing them closer to the image plane, achieving miniaturization, reducing light loss, and improving image quality. The sixth lens is a positive lens and is biconvex in shape. Firstly, the first side surface, being convex, reduces the angle of incidence of light, allowing more light to enter the optical system and achieving high throughput. Simultaneously, it facilitates the convergence of incident light rays transmitted by the front optical system, enabling them to quickly reach the image plane, thus contributing to a short time-to-live (TTL). Then, the second side surface, also convex, further converges the light rays in front, reducing the rear aperture.

[0107] It is worth noting that the sixth lens has at least one concave surface, that is, at least one of the first and second sides of the sixth lens is concave, which is more conducive to the control of light, and facilitates the improvement of image quality and the achievement of high resolution.

[0108] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the second lens and the third lens. By disposing of an aperture stop between the second and third lenses, it is beneficial to effectively converge the light entering the optical system, reduce the lens apertures at the front and rear ends of the optical system, increase the light transmission, and reduce the sensitivity of the optical lens during assembly. It should be understood that disposing the aperture stop between the second and third lenses is merely exemplary, and this application does not impose specific limitations on it; the aperture stop may be disposed in other positions as needed.

[0109] It is worth noting that all lenses in the optical lens of this application can be implemented as spherical glass lenses, that is, the optical lens can adopt all-glass spherical lenses, so as to effectively reduce costs while meeting temperature performance and high resolution requirements. It should be understood that when the focus is on resolution performance, aspherical lenses can also be added to the optical lens to further improve resolution quality; when the focus is on cost, glass lenses can be replaced with plastic lenses to reduce lens costs.

[0110] In addition, in order to balance the aberrations of the central and peripheral fields of view and improve resolution, the optical lens of this application may also be a recurved lens, which will not be elaborated further in this application.

[0111] In an exemplary embodiment, the optical lens may further include a filter located between the sixth lens and the image plane to filter light of different wavelengths. It should be understood that the optical lens may also provide a protective glass between the filter and the image plane as needed to prevent damage to internal components (e.g., chips) of the optical lens.

[0112] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0113] In an exemplary embodiment, the total optical length (TTL) and the total effective focal length (F) of the optical lens can satisfy: 2 ≤ TTL / F ≤ 4.5. Preferably, 2.8 ≤ TTL / F ≤ 3.4. Further, 2.912 ≤ TTL / F ≤ 3.259. By controlling this relationship, the ratio between the total optical length and the total effective focal length of the optical lens can be reasonably managed, which is beneficial for miniaturization while also considering telephoto capabilities. It is understood that the preferred range (e.g., 2.8 ≤ TTL / F ≤ 3.4) and further ranges (e.g., 2.912 ≤ TTL / F ≤ 3.259) of each relationship disclosed in this application can achieve better results and achieve higher image quality.

[0114] In an exemplary embodiment, the aperture D11 on 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 (FOV) of the optical lens can satisfy: 3 ≤ D11 / H / FOV × 180° ≤ 7. Preferably, 4 ≤ D11 / H / FOV × 180° ≤ 6. Further, 4.341 ≤ D11 / H / FOV × 180° ≤ 5.607. By controlling this relationship, the front aperture of the optical lens, the maximum field of view of the optical lens, and its corresponding image height can be reasonably controlled, which is beneficial to achieve high resolution while realizing a small aperture at the front of the lens, thus taking into account both a large field of view and a large image plane.

[0115] In an exemplary embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens can satisfy: 0.03≤|(HF×θ) / (F×θ)|≤0.1. Preferably, 0.035≤|(HF×θ) / (F×θ)|≤0.09. Further, 0.047≤|(HF×θ) / (F×θ)|≤0.08. By controlling this relationship, the image height, total effective focal length, and radian value corresponding to the maximum field of view of the optical lens can be reasonably controlled, which is beneficial to achieve low distortion while satisfying high resolution, and to more realistically reproduce the captured objects and scenes.

[0116] In an exemplary embodiment, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens can satisfy: 0.03 ≤ BFL / TTL ≤ 0.35. Preferably, 0.05 ≤ BFL / TTL ≤ 0.3. Further, 0.079 ≤ BFL / TTL ≤ 0.233. By controlling this relationship, the optical back focal length and optical total length (TTL) of the optical lens can be reasonably managed, which is beneficial for flexibly adjusting the lens thickness and air gap, achieving miniaturization while also considering a suitable back focal length.

[0117] In an exemplary embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view can satisfy: 55° ≤ FOV × F / H ≤ 70°. Preferably, 58° ≤ FOV × F / H ≤ 65°. Further, 60.091° ≤ FOV × F / H ≤ 62.291°. By controlling this relationship, the total effective focal length, image height, and field of view of the optical lens can be managed, which is beneficial for achieving high resolution while also realizing telephoto capabilities and a large field of view.

[0118] In an exemplary embodiment, the maximum field of view (FOV) of the optical lens and the corresponding image height (H) can satisfy the following condition: 5° / mm ≤ FOV / H ≤ 7.5° / mm. Preferably, 6° / mm ≤ FOV / H ≤ 7° / mm. Further, 6.378° / mm ≤ FOV / H ≤ 6.491° / mm. By controlling this relationship, the maximum field of view and its corresponding image height of the optical lens can be reasonably managed, which is beneficial for achieving a large field of view while also considering a large image plane.

[0119] In an exemplary embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view (FOV) of the optical lens, and the maximum field of view (FOV) of the optical lens can satisfy: 13 ≤ TTL / H / FOV × 180° ≤ 17. Preferably, 14 ≤ TTL / H / FOV × 180° ≤ 16.7. Further, 14.48 ≤ TTL / H / FOV × 180° ≤ 16.151. By controlling this relationship, the total optical length, maximum field of view, and corresponding image height of the optical lens can be reasonably controlled, which is beneficial for miniaturization while taking into account both a large field of view and a large image plane.

[0120] In an exemplary embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 0.8 ≤ F / H ≤ 1.8. Preferably, 1.2 ≤ F / H ≤ 1.4. Further, 1.273 ≤ F / H ≤ 1.32. By controlling this relationship, the total effective focal length and image height of the optical lens can be reasonably managed, which is beneficial for the optical system to meet high resolution while also taking into account telephoto capabilities.

[0121] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: 3≤F1 / F≤10. Preferably, 3.5≤F1 / F≤8.5. Further, 3.855≤F1 / F≤6.857. By controlling this relationship, the effective focal length of the first lens and the total effective focal length of the optical lens are kept within a reasonable range, which is beneficial for collecting light from a large field of view into the rear optical system and achieving telephoto capabilities. In addition, if the effective focal length of the first lens is not too large, it is beneficial for light convergence, achieving a large field of view and a small aperture; if the effective focal length of the first lens is not too small, it is beneficial for controlling the rear light, achieving high resolution and a large image plane.

[0122] In an exemplary embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: -1≤F2 / F≤-0.2. Preferably, -0.8≤F2 / F≤-0.5. Further, -0.741≤F2 / F≤-0.585. By controlling this relationship, the effective focal length of the second lens is kept relatively small, which is beneficial for better diverging of the light rays converging in front, increasing the light flux, and enabling the edge rays to be effectively diverged, thereby improving edge illumination; at the same time, it is beneficial for increasing the distance between edge rays to achieve small distortion.

[0123] It is worth noting that this application combines the relation -1≤F2 / F≤-0.2 with the relation 3≤F1 / F≤10, which enables large field-of-view light rays to be collected and diffused better, making it more conducive to achieving a small aperture at the front end.

[0124] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 0.2 ≤ F3 / F ≤ 2. Preferably, 0.5 ≤ F3 / F ≤ 1.5. More preferably, 0.6 ≤ F3 / F ≤ 1.25. Further, 0.759 ≤ F3 / F ≤ 1.16. By controlling this relationship, the effective focal length of the third lens is kept relatively small, which can effectively converge the diverging light rays, reduce the rear aperture, and shorten the TTL. In addition, the third lens of this application is a key light turning point in this architecture. Reasonably controlling the range of the relationship F3 / F is beneficial to improving image quality while ensuring miniaturization.

[0125] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can satisfy: 0.2 ≤ |F4 / F| ≤ 2.5. Preferably, 0.3 ≤ |F4 / F| ≤ 2.2. Further, 0.506 ≤ |F4 / F| ≤ 1.686. By controlling this relationship, the effective focal length of the fourth lens can be managed, allowing for better control of light trajectory and enabling better light entry into the rear optical system, thus improving image quality.

[0126] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.1 ≤ |F5 / F| ≤ 5. Preferably, 0.2 ≤ |F5 / F| ≤ 4.5. Further, 0.349 ≤ |F5 / F| ≤ 3.295. By controlling this relationship, the effective focal length of the fifth lens can be controlled, which is beneficial for better controlling the light path, allowing light to enter the rear optical system more effectively, and improving image quality.

[0127] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: 0.2 ≤ |F6 / F| ≤ 25. Preferably, 0.5 ≤ |F6 / F| ≤ 20. More preferably, 0.7 ≤ |F6 / F| ≤ 18. Further, 0.939 ≤ |F6 / F| ≤ 11.862. By controlling this relationship, the effective focal length of the sixth lens is controlled, so that the light rays emitted from the fifth lens can reach the imaging plane approximately perpendicularly after passing through the sixth lens, which is beneficial for achieving a small CRA and improving image quality.

[0128] In an exemplary embodiment, the combined focal length F45 of the fourth and fifth lenses and the total effective focal length F of the optical lens can satisfy: F45 / F > 0; that is, the combined focal length F45 of the fourth and fifth lenses is a positive value. Preferably, 0.5 ≤ F45 / F ≤ 800. Further, 0.97 ≤ F45 / F ≤ 585.845. By controlling this relationship, ensuring that the combined focal length of the fourth and fifth lenses is positive, it is possible to further converge the light rays converging in front, alleviate the converging pressure of the third lens, reduce system sensitivity, and improve resolution quality. In addition, further controlling the combined focal length of the fourth and fifth lenses within a reasonable range is beneficial for the smooth transition of light to the sixth lens, making the light rays converge gently overall, improving image quality while reducing the rear aperture.

[0129] In an exemplary embodiment, the effective focal length Fpositive of the positive lens and the effective focal length Fnegative of the negative lens in the fourth and fifth lenses can satisfy: -3 ≤ Fpositive / Fnegative < 0. Preferably, -2 ≤ Fpositive / Fnegative ≤ -0.1. Further, -1.452 ≤ Fpositive / Fnegative ≤ -0.183. By controlling this relationship, the focal lengths of the positive and negative lenses in the cemented lens can be reasonably matched, which is beneficial to smooth the light path in the cemented lens, reduce light energy loss, better correct chromatic aberration, and improve resolution quality.

[0130] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: -12 ≤ F1 / F2 ≤ -3. Preferably, -11 ≤ F1 / F2 ≤ -4. Further, -9.819 ≤ F1 / F2 ≤ -5.334. By controlling this relationship, the focal length pairing of the first and second lenses can be reasonably managed, so that the focal length of the second lens is smaller than that of the first lens. This facilitates better entry of light from a large field of view into the optical system, thereby achieving a large field of view while maintaining a small aperture, and simultaneously achieving a telephoto lens.

[0131] In an exemplary embodiment, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, and the total effective focal length F of the optical lens can satisfy: -2≤(1 / F1+1 / F2) / (1 / F)≤-0.5. Preferably, -1.65≤(1 / F1+1 / F2) / (1 / F)≤-1. Further, -1.498≤(1 / F1+1 / F2) / (1 / F)≤-1.11. By controlling this relationship, the optical power of the first and second lenses can be reasonably set, making the overall light rays in front diverge, which can increase the light transmission, improve the relative illumination, increase the design freedom of the rear lens, and achieve high resolution.

[0132] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the aperture D11 on the first side surface of the first lens corresponding to the maximum field of view of the optical lens can satisfy: 0.5 ≤ R11 / D11 ≤ 2. Preferably, 0.85 ≤ R11 / D11 ≤ 1.6. Further, 0.973 ≤ R11 / D11 ≤ 1.418. By controlling this relationship, the ratio range between the radius of curvature of the first side surface of the first lens and the aperture can be reasonably controlled, thereby simultaneously achieving a small front-end aperture and a large field of view.

[0133] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the first lens and the effective focal length F1 of the first lens can satisfy: 0.05≤R11 / F1≤0.45. Preferably, 0.1≤R11 / F1≤0.4. Further, 0.166≤R11 / F1≤0.34. By controlling this relationship, the ratio range between the radius of curvature of the first side surface of the first lens and the effective focal length of the first lens can be reasonably controlled, which is beneficial to better collecting light from a large field of view, so as to achieve a large field of view while satisfying the telephoto requirement; at the same time, it can make the pupil image of the ghost image far away from the focal plane, so that the ghost image light rays on the image plane are relatively divergent, effectively reducing the relative energy value of the ghost image and improving the quality of the image formed by the lens.

[0134] In an exemplary embodiment, the radius of curvature R12 of the second side surface of the first lens and the effective focal length F1 of the first lens can satisfy: 0.05≤R12 / F1≤0.7. Preferably, 0.08≤R12 / F1≤0.6. Further, 0.188≤R12 / F1≤0.501. By controlling this relationship, the ratio range between the radius of curvature of the second side surface of the first lens (which is concave) and the effective focal length of the first lens can be reasonably controlled, allowing light to smoothly enter the second lens after passing through the first lens. This helps to reduce system sensitivity and improve resolution quality.

[0135] In an exemplary embodiment, the radius of curvature R12 of the second side of the first lens and the radius of curvature R11 of the first side of the first lens can satisfy: 0.5 ≤ R12 / R11 ≤ 2.5. Preferably, 1 < R12 / R11 ≤ 1.6. Further, 1.13 < R12 / R11 ≤ 1.476. By controlling this relationship, the ratio range of the radii of curvature on both sides of the first lens can be reasonably controlled, which is beneficial for collecting light rays with a large field of view into the optical system and realizing large-angle imaging; at the same time, it is beneficial for realizing a small aperture at the front end.

[0136] In an exemplary embodiment, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R22 of the second side surface of the second lens can satisfy: -2.5 ≤ R21 / R22 ≤ -0.3. Preferably, -2 ≤ R21 / R22 ≤ -0.5. Further, -1.824 ≤ R21 / R22 ≤ -0.795. By controlling this relationship, the ratio range of the radii of curvature on both sides of the second lens can be reasonably controlled, which can appropriately diverge the light, so that the subsequent optical system has a larger light receiving surface, which is beneficial to balancing aberrations and improving resolution quality.

[0137] In an exemplary embodiment, the radius of curvature R31 of the first side of the third lens and the radius of curvature R32 of the second side of the third lens can satisfy: -2≤R31 / R32≤-0.3. Preferably, -1.4≤R31 / R32≤-0.45. Further, -1.2≤R31 / R32≤-0.626. By controlling this relationship, not only is the positive optical power of the third lens controlled, serving as a key turning point for light in this architecture, but the radii of curvature on both sides of the third lens are also reasonably set, allowing light to have a reasonable transition, which helps to reduce system sensitivity and improve resolution quality.

[0138] In an exemplary embodiment, the radius of curvature R31 of the first side surface of the third lens and the total effective focal length F of the optical lens can satisfy: 0.5 ≤ R31 / F ≤ 2.5. Preferably, 0.8 ≤ R31 / F ≤ 1.9. Further, 1.099 ≤ R31 / F ≤ 1.717. By controlling this relationship, the first side surface of the third lens is controlled to be convex and have a small radius of curvature, which is beneficial for better light convergence, reducing the rear port diameter and shortening the TTL; at the same time, it is also beneficial for reducing light loss and improving image quality.

[0139] In an exemplary embodiment, the radius of curvature R31 of the first side surface of the third lens and the total effective focal length F of the optical lens can satisfy: 0.5 ≤ R41 / F ≤ 2. Preferably, 0.7 ≤ R41 / F ≤ 1.7. Further, 0.83 ≤ R41 / F ≤ 1.483. By controlling this relationship, the first side surface of the fourth lens is controlled to be convex and have a small radius of curvature, further converging the light rays converged by the third lens. This helps to alleviate the converging pressure of the third lens, reduce system sensitivity, and improve resolution quality.

[0140] In an exemplary embodiment, the radius of curvature R12 of the second side surface of the first lens and the axial distance d12 from the second side surface of the first lens to the first side surface of the second lens can satisfy: 2 ≤ R12 / d12 ≤ 18. Preferably, 2.5 ≤ R12 / d12 ≤ 16. Further, 3.895 ≤ R12 / d12 ≤ 12.512. By controlling this relationship, it is beneficial for the collected large field-of-view light to enter the second lens better, reducing light loss, improving imaging quality, and simultaneously achieving a large field of view and a small front-end aperture.

[0141] In an exemplary embodiment, the center thickness d3 of the third lens on the optical axis and the total optical length TTL of the optical lens can satisfy: 0.1 ≤ d3 / TTL ≤ 0.25. Preferably, 0.15 ≤ d3 / TTL ≤ 0.2. More preferably, 0.153 ≤ d3 / TTL ≤ 0.195. Further, 0.161 ≤ d3 / TTL ≤ 0.186. By controlling this relationship, the center thickness of the third lens can be reasonably controlled. Combined with a positive optical power for the third lens, light can be effectively converged, which helps to ensure high resolution while reducing the rear aperture, shortening the TTL, and achieving miniaturization.

[0142] In an exemplary embodiment, the central thickness d3 of the third lens on the optical axis and the total effective focal length F of the optical lens can satisfy: 0.3≤d3 / F3≤0.9. Preferably, 0.4≤d3 / F3≤0.8. Further, 0.451≤d3 / F3≤0.699. The third lens of this application is a positive lens, capable of converging light rays, and is a key light inflection point in this architecture, with significant light refraction. Simultaneously, appropriately increasing the central thickness of the third lens and rationally controlling its relationship with the effective focal length helps increase the optical path, effectively converge diverging light rays incident from the front, smooth the light path, reduce system sensitivity, and improve resolution quality.

[0143] In an exemplary embodiment, the center thickness d1 of the first lens on the optical axis, the axial distance d12 between the second side surface of the first lens and the first side surface of the second lens, the center thickness d2 of the second lens on the optical axis, the axial distance d23 between the second side surface of the second lens and the first side surface of the third lens, and the center distance TL between the first side surface of the first lens and the second side surface of the sixth lens in the optical lens can satisfy: 0.2≤(d1+d12+d2+d23) / TL≤0.5. Preferably, 0.22≤(d1+d12+d2+d23) / TL≤0.4. Further, 0.252≤(d1+d12+d2+d23) / TL≤0.366. By controlling this relationship, the center thickness and air gap of the first and second lenses, and the air gap between the second and third lenses can be reasonably controlled, making the front end structure of the optical lens compact and leaving sufficient space for the rear lens arrangement, which is beneficial to achieving high resolution while meeting miniaturization requirements.

[0144] In an exemplary embodiment, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, and the center distance TL between the first side surface of the first lens and the second side surface of the sixth lens on the optical axis can satisfy: 0.1 ≤ (d4 + d5) / TL ≤ 0.6. Preferably, 0.2 ≤ (d4 + d5) / TL ≤ 0.5. Further, 0.226 ≤ (d4 + d5) / TL ≤ 0.41. By controlling this relationship, the center thickness of the lenses in the cemented lens can be appropriately increased within a certain range, which is beneficial to enhancing the ability to control light and improving image quality.

[0145] In an exemplary embodiment, the aperture D62 on the second side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 0.7 ≤ D62 / H ≤ 1.3. Preferably, 0.85 ≤ D62 / H ≤ 1.1. More preferably, 0.88 ≤ D62 / H ≤ 1.06. Further, 0.915 ≤ D62 / H ≤ 1.029. By controlling this relationship, the aperture of the second side of the sixth lens is close to the image height, ensuring that the deflection angle of light reaching the imaging plane is small, which is beneficial for achieving a small CRA.

[0146] It is worth noting that this application can rationally set the focal length and radii of curvature of the first lens by combining the relationships 3≤F1 / F≤10, 0.05≤R11 / F1≤0.45, 0.05≤R12 / F1≤0.7, and 5° / mm≤FOV / H≤7.5° / mm. This is beneficial for better collecting light from a large field of view, so as to achieve a small aperture at the front end while satisfying the requirements of long focal length. At the same time, the light can enter the second lens smoothly, which is beneficial for the control of the rear light and further achieves high resolution.

[0147] Furthermore, this application can also achieve a positive and small focal length for the third lens by combining the relationships -2≤R31 / R32≤-0.3, 0.5≤R31 / F≤2.5, and 0.2≤F3 / F≤2. This allows the light to converge quickly. By reasonably setting the curvature radii on both sides of the third lens, the light can be properly transitioned, which helps to reduce the sensitivity of the system and achieve high resolution while miniaturizing the image.

[0148] In addition, this application can also achieve a positive and small focal length for the third lens by combining the relationship 0.3≤d3 / F3≤0.9 and the relationship 0.1≤d3 / TTL≤0.25, which can quickly converge light. By reasonably setting the center thickness of the third lens, it is beneficial to increase the optical path, smooth the light path, reduce the system sensitivity, and achieve high resolution. At the same time, it can effectively converge the light in front, reduce the rear port diameter, reduce the TTL, and achieve miniaturization.

[0149] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the six lenses mentioned above. By rationally allocating the optical parameters of each lens, one or more advantages of the optical lens, such as small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, low distortion, small principal beam angle, high illumination, and manufacturability, are achieved. Furthermore, it can be well matched with various application chips, such as automotive chips, and can effectively suppress vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of applications such as automotive applications.

[0150] Those skilled in the art should understand that the total optical length (TTL) of the optical lens used above refers to the axial distance from the first side surface of the first lens to the imaging plane or image source plane; the optical back focal length (BFL) of the optical lens refers to the axial distance from the second side surface of the sixth lens to the imaging plane or image source plane; the maximum field of view (FOV) of the optical lens is related to the image height (H), which refers to the field of view corresponding to the image height (H); the center thickness of each lens refers to the axial distance from the first side surface of the current lens to the second side surface of the current lens; the air gap refers to the axial distance between two adjacent lenses, such as the air gap between the first lens and the second lens, which refers to the axial distance between the second side surface of the first lens and the first side surface of the second lens.

[0151] Furthermore, this application focuses on protecting the lens structure, and the lens surface shape is not limited to spherical or aspherical; if the focus is on image quality, the lens can be made entirely of aspherical lenses. The lens material is also not limited to plastic and glass; if the focus is on temperature performance, the lens can be made entirely of glass lenses.

[0152] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If desired, the optical lens may also include other numbers of lenses.

[0153] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units for the radius of curvature and thickness / distance in the basic parameters of the optical lens are mm.

[0154] Example 1

[0155] The following is for reference Figure 1 The optical lens according to Embodiment 1 of this application is described.

[0156] like Figure 1As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. An aperture stop STO can be positioned between the second lens L2 and the third lens L3. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0157] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0158] The second lens L2 has negative optical power, and its first side surface S3 is concave, and its second side surface S4 is concave.

[0159] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0160] The fourth lens L4 has negative optical power, and its first side surface S8 is convex and its second side surface is concave.

[0161] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0162] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0163] An image plane IMA is disposed on the second side of the optical lens. A filter IR is disposed between the sixth lens L6 and the image plane IMA. The filter IR has a first side surface S13 and a second side surface S14. A protective glass CG is disposed between the filter IR and the image plane IMA. The protective glass CG has a first side surface S15 and a second side surface S16. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0164] Table 1 shows the basic parameters of the optical lens of Embodiment 1. It should be understood that the second side surface of the fourth lens L4 has exactly the same surface profile parameters as the first side surface S9 of the fifth lens L5.

[0165] Table 1

[0166]

[0167] from Figure 2 As can be seen, the MTF peak value of the optical lens in Example 1 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.6. Therefore, the optical lens given in Example 1 has good imaging quality and can achieve a high resolution of eight megapixels.

[0168] Example 2

[0169] The following is for reference Figure 3 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 3 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different.

[0170] Table 2 shows the basic parameters of the optical lens in Example 2.

[0171] Table 2

[0172]

[0173] from Figure 4 As can be seen, the MTF peak value of the optical lens in Example 2 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.63. Therefore, the optical lens given in Example 2 has good imaging quality and can achieve a high resolution of eight megapixels.

[0174] Example 3

[0175] The following is for reference Figure 5 Describes an optical lens according to Embodiment 3 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 radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; the sixth lens L6 has positive optical power and its first side S11 is convex.

[0176] Table 3 shows the basic parameters of the optical lens of Example 3.

[0177] Table 3

[0178]

[0179] from Figure 6 As can be seen, the MTF peak value of the optical lens in Example 3 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.55. Therefore, the optical lens given in Example 3 has good imaging quality and can achieve a high resolution of eight megapixels.

[0180] Example 4

[0181] The following is for reference Figure 7 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 7As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; the sixth lens L6 has positive optical power and its first side S11 is convex.

[0182] Table 4 shows the basic parameters of the optical lens of Example 4.

[0183] Table 4

[0184]

[0185] from Figure 8 As can be seen, the MTF peak value of the optical lens in Example 4 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.55. Therefore, the optical lens given in Example 4 has good imaging quality and can achieve a high resolution of eight megapixels.

[0186] Example 5

[0187] The following is for reference Figure 9 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; the sixth lens L6 has positive optical power and its first side S11 is convex and its second side S12 is concave.

[0188] Table 5 shows the basic parameters of the optical lens of Example 5.

[0189] Table 5

[0190]

[0191] from Figure 10 As can be seen, the MTF peak value of the optical lens in Example 5 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.69. Therefore, the optical lens given in Example 5 has good imaging quality and can achieve a high resolution of eight megapixels.

[0192] Example 6

[0193] The following is for reference Figure 11 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 11As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; the sixth lens L6 has positive optical power and its first side S11 is convex and its second side S12 is concave.

[0194] Table 6 shows the basic parameters of the optical lens of Example 6.

[0195] Table 6

[0196]

[0197] from Figure 12 As can be seen, the MTF peak value of the optical lens in Example 6 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.69. Therefore, the optical lens given in Example 6 has good imaging quality and can achieve a high resolution of eight megapixels.

[0198] Example 7

[0199] The following is for reference Figure 13 Describes an optical lens according to Embodiment 7 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 radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave; the sixth lens L6 has a first side S11 that is convex and a second side S12 that is concave.

[0200] Table 7 shows the basic parameters of the optical lens of Example 7.

[0201] Table 7

[0202]

[0203] from Figure 14 As can be seen, the MTF peak value of the optical lens in Example 7 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.72. Therefore, the optical lens given in Example 7 has good imaging quality and can achieve a high resolution of eight megapixels.

[0204] Example 8

[0205] The following is for reference Figure 15 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 15As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave; the sixth lens L6 has a first side S11 that is convex and a second side S12 that is concave.

[0206] Table 8 shows the basic parameters of the optical lens of Example 8.

[0207] Table 8

[0208]

[0209] from Figure 16 As can be seen, the MTF peak value of the optical lens in Example 8 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.73. Therefore, the optical lens given in Example 8 has good imaging quality and can achieve a high resolution of eight megapixels.

[0210] Example 9

[0211] The following is for reference Figure 17 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 17 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave; and the second side S12 of the sixth lens L6 is concave.

[0212] Table 9 shows the basic parameters of the optical lens of Example 9.

[0213] Table 9

[0214]

[0215] from Figure 18 As can be seen, the MTF peak value of the optical lens in Example 9 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.74. Therefore, the optical lens given in Example 9 has good imaging quality and can achieve a high resolution of eight megapixels.

[0216] Example 10

[0217] The following is for reference Figure 19 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 19As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave; and the second side S12 of the sixth lens L6 is concave.

[0218] Table 10 shows the basic parameters of the optical lens of Embodiment 10.

[0219] Table 10

[0220]

[0221] from Figure 20 As can be seen, the MTF peak value of the optical lens of Example 10 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.75. Therefore, the optical lens given in Example 10 has good imaging quality and can achieve a high resolution of eight megapixels.

[0222] Example 11

[0223] The following is for reference Figure 21 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 21 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; and the sixth lens L6 has positive optical power.

[0224] Table 11 shows the basic parameters of the optical lens of Embodiment 11.

[0225] Table 11

[0226]

[0227] from Figure 22 As can be seen, the MTF peak value of the optical lens in Example 11 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.68. Therefore, the optical lens given in Example 11 has good imaging quality and can achieve a high resolution of eight megapixels.

[0228] Example 12

[0229] The following is for reference Figure 23 Describes an optical lens according to Embodiment 12 of this application. For example... Figure 23As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side is convex; the fifth lens L5 has negative optical power and its first side S9 is concave and its second side S10 is concave; and the sixth lens L6 has positive optical power.

[0230] Table 12 shows the basic parameters of the optical lens of Example 12.

[0231] Table 12

[0232]

[0233] from Figure 24 As can be seen, the MTF peak value of the optical lens in Example 12 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.7. Therefore, the optical lens given in Example 12 has good imaging quality and can achieve a high resolution of eight megapixels.

[0234] Example 13

[0235] The following is for reference Figure 25 Describes an optical lens according to Embodiment 13 of this application. For example... Figure 25 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side surface is convex; the fifth lens L5 has negative optical power and its first side surface S9 is concave.

[0236] Table 13 shows the basic parameters of the optical lens of Example 13.

[0237] Table 13

[0238]

[0239] from Figure 26 As can be seen, the MTF peak value of the optical lens in Example 13 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.72. Therefore, the optical lens given in Example 13 has good imaging quality and can achieve a high resolution of eight megapixels.

[0240] Example 14

[0241] The following is for reference Figure 27 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 27As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side surface is convex; the fifth lens L5 has negative optical power and its first side surface S9 is concave.

[0242] Table 14 shows the basic parameters of the optical lens of Example 14.

[0243] Table 14

[0244]

[0245] from Figure 28 As can be seen, the MTF peak value of the optical lens in Example 14 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.73. Therefore, the optical lens given in Example 14 has good imaging quality and can achieve a high resolution of eight megapixels.

[0246] Example 15

[0247] The following is for reference Figure 29 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 29 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power and its second side surface is convex; the fifth lens L5 has negative optical power and its first side surface S9 is concave.

[0248] Table 15 shows the basic parameters of the optical lens of Example 15.

[0249] Table 15

[0250]

[0251] from Figure 30 As can be seen, the MTF peak value of the optical lens in Example 15 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.72. Therefore, the optical lens given in Example 15 has good imaging quality and can achieve a high resolution of eight megapixels.

[0252] Tables 16-1 and 16-2 provide the basic parameters of the optical lenses used in Examples 1 to 15, such as FNO, TL, F, H, FOV, D11, θ, BFL, F1, F2, F3, F4, F5, F6, F45, F-positive, F-negative, R11, R12, R21, R22, R31, R32, R41, d12, d3, d1, d2, d23, TL, d4, d5, and D62. The unit for FOV in the tables is °, the unit for θ is the radian value corresponding to FOV, and the units for other parameters are mm.

[0253] Table 16-1

[0254]

[0255] Table 16-2

[0256]

[0257] In summary, the relationships in each of the embodiments in Examples 1 to 15 satisfy the relationships shown in Tables 17-1 and 17-2.

[0258] Table 17-1

[0259]

[0260] Table 17-2

[0261]

[0262] This application also provides an electronic device, which includes at least one of the optical lens, imaging element, and light source in the above exemplary embodiments; wherein the imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; wherein the light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

[0263] It is worth noting that the electronic device can be, but is not limited to, a lidar, a camera, or a projection lamp. Accordingly, the optical lens can serve as a light-emitting lens or a light-receiving lens. For example, in the case of a camera, the electronic device may include the optical lens described in the exemplary embodiments above and a photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal. The photoelectric sensor is disposed on a second side of the optical lens, for example, on the imaging surface, and can be implemented as a photocoupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0264] When the electronic device is a projection lamp, it may include the optical lens and light source described in the exemplary embodiments above, with the light source located on the second side of the optical lens. Light emitted from the light source is projected onto the first side of the optical lens after passing through it, forming an image or illuminating an area on the first side.

[0265] Furthermore, when the electronic device is a lidar, the receiving lens of the lidar can be implemented as the aforementioned optical lens, with the first side of the optical lens being the object side and the second side of the optical lens being the image side.

[0266] It is worth noting that the electronic device implemented as a lidar can include a first device and a second device. The first device can be implemented as a lidar transmitter, and the second device can be implemented as a lidar receiver. The first device can include the optical lens and light source in the exemplary embodiments described above. The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device can include the optical lens in the exemplary embodiments described above and a photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal. The photoelectric sensor is disposed on the second side of the optical lens (e.g., disposed on the imaging surface). The photoelectric sensor can be implemented as a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0267] It is worth mentioning that this application also provides a vehicle that may include the aforementioned electronic equipment for acquiring information.

[0268] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens characterized in that, sequentially include, along the optical axis from the first side to the second side: a first lens with positive refractive power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens with negative refractive power, a first side of the second lens being concave, a second side of the second lens being concave; a third lens with positive refractive power, a first side of the third lens being convex, a second side of the third lens being convex; a fourth lens with refractive power; a fifth lens with refractive power, a sign of the refractive power of the fifth lens being opposite to that of the fourth lens; and a sixth lens with refractive power; wherein a number of lenses with refractive power in the optical lens is six; the optical lens satisfies: 3≤F1 / F≤10; wherein F1 is an effective focal length of the first lens, and F is a total effective focal length of the optical lens.

2. The optical lens according to claim 1, wherein: the fourth lens has positive refractive power, a first side of the fourth lens being convex, a second side of the fourth lens being convex, or the fourth lens has negative refractive power, a first side of the fourth lens being convex, a second side of the fourth lens being concave; and / or, the fifth lens has negative refractive power, a first side of the fifth lens being concave, a second side of the fifth lens being concave or convex, or the fifth lens has positive refractive power, a first side of the fifth lens being convex, a second side of the fifth lens being convex; and / or, the sixth lens has positive refractive power or negative refractive power, or a first side of the sixth lens is concave, a second side of the sixth lens is concave or convex, or a first side of the sixth lens is convex, a second side of the sixth lens is convex or concave; and / or, the fourth lens and the fifth lens are cemented to each other; and / or, the optical lens further comprises a diaphragm between the second lens and the third lens; and / or, all lenses in the optical lens are spherical glass lenses.

3. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: 2≤TTL / F≤4.5; wherein TTL is an optical total length of the optical lens, and F is a total effective focal length of the optical lens.

4. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: 0.03≤|(H-F×θ) / (F×θ)|≤0.1; wherein H is an image height corresponding to a maximum field angle of the optical lens, θ is an arc value of the maximum field angle of the optical lens, and F is a total effective focal length of the optical lens.

5. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: 5° / mm≤FOV / H≤7.5° / mm; wherein FOV is a maximum field angle of the optical lens, and H is an image height corresponding to the maximum field angle of the optical lens.

6. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: -1≤F2 / F≤-0.2; wherein F2 is an effective focal length of the second lens, and F is a total effective focal length of the optical lens.

7. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: 0.2≤F3 / F≤2; wherein F3 is an effective focal length of the third lens, and F is a total effective focal length of the optical lens.

8. The optical lens of claim 1 or claim 2, wherein, The combined focal length of the fourth lens and the fifth lens is a positive value.

9. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: -2≤(1 / F1+1 / F2) / (1 / F)≤-0.5; Wherein, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens.

10. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies the following condition: 0.05 ≤ R11 / F1 ≤ 0.45; Wherein, R11 is the radius of curvature of the first side surface of the first lens, and F1 is the effective focal length of the first lens.

11. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies the following condition: 0.5 ≤ R31 / F ≤ 2.5; Wherein, R31 is the radius of curvature of the first side surface of the third lens, and F is the total effective focal length of the optical lens.

12. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0.1≤d3 / TTL≤0.25; Wherein, d3 is the center thickness of the third lens on the optical axis, and TTL is the total optical length of the optical lens.

13. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0.3 ≤ d3 / F3 ≤ 0.9; Wherein, d3 is the center thickness of the third lens on the optical axis, and F3 is the effective focal length of the third lens.

14. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 3≤D11 / H / FOV×180°≤7, 0.03≤BFL / TTL≤0.35, 55°≤FOV×F / H≤70°, 13≤TTL / H / FOV×180°≤17, 0.8≤F / H≤1.8, 0.2≤|F4 / F|≤2.5, 0.1≤|F5 / F|≤5, 0.2≤|F6 / F|≤25, -3≤Fpositive / Fnegative <0, -12≤F1 / F2 ≤-3, 0.5≤R11 / D11≤2, 0.5≤R12 / R11≤2.5, -2.5≤R21 / R22≤-0.3, 0.2≤(d1+d12+d2+d23) / TL≤0.5, 0.05≤R12 / F1≤0.7, -2≤R31 / R32≤-0.3, 0.5≤R41 / F≤2, 2≤R12 / d12≤18, 0.7≤D62 / H≤1.3 and 0.1≤(d4+d5) / TL≤0.6; Wherein, D11 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, BFL is the optical back focus of the optical lens, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, Fpositive is the effective focal length of the positive lens among the fourth lens and the fifth lens, Fnegative is the effective focal length of the negative lens among the fourth lens and the fifth lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, R11 is the curvature radius of the first side of the first lens, R12 is the curvature radius of the second side of the first lens, R21 is the curvature radius of the first side of the second lens, R22 is the curvature radius of the second side of the second lens, d1 is the central thickness of the first lens on the optical axis, d12 is the on-axis distance from the second side of the first lens to the first side of the second lens, d2 is the central thickness of the second lens on the optical axis, d23 is the on-axis distance from the second side of the second lens to the first side of the third lens, TL is the central distance on the optical axis from the first side of the first lens to the second side of the sixth lens in the optical lens, R31 is the curvature radius of the first side of the third lens, R32 is the curvature radius of the second side of the third lens, R41 is the curvature radius of the first side of the fourth lens, D62 is the clear aperture on the second side of the sixth lens corresponding to the maximum field angle of the optical lens, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis.

15. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 2.8≤TTL / F≤3.4, 4≤D11 / H / FOV×180°≤6, 0.035≤|(HF×θ) / (F×θ)|≤0.09, 0.05≤BFL / TTL≤0.3, 58°≤FOV×F / H≤65°, 6° / mm≤FOV / H≤7° / mm, 14≤TTL / H / FOV×180°≤16.7, 1.2≤F / H≤1.4, 3.5≤F1 / F≤8.5, -0.8≤F2 / F≤-0.5, 0.5≤F3 / F≤1.5, 0.3≤|F4 / F|≤2.2, 0.2≤|F5 / F|≤4.5, 0.5≤|F6 / F|≤20, 0.5≤F45 / F≤800, -2≤Fpositive / Fnegative≤-0 .1, -11≤F1 / F2≤-4, -1.65≤(1 / F1+1 / F2) / (1 / F)≤-1, 0.85≤R11 / D11≤1.6, 0.1≤R11 / F1≤0.4, 0.08≤R12 / F1≤0.6, 1<R12 / R11≤1.6, -2≤R21 / R22≤-0.5, -1.4≤R31 / R32≤-0.

45. 0.8≤R31 / F≤1.9, 0.7≤R41 / F≤1.7, 2.5≤R12 / d12≤16, 0.15≤d3 / TTL≤0.2, 0.4≤d3 / F3≤0.8, 0.22≤(d1+d12+d2+d23) / TL≤0.4, 0.2≤(d4+d5) / TL≤0.5, and 0.85≤D62 / H≤1.1; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, D11 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, θ is the radian value of the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F45 is the combined focal length of the fourth lens and the fifth lens, Fpositive is the effective focal length of the positive lens in the fourth lens and the fifth lens, Fnegative is the effective focal length of the negative lens in the fourth lens and the fifth lens, R11 is the curvature radius of the first side of the first lens, R12 is the curvature radius of the second side of the first lens, R21 is the curvature radius of the first side of the second lens, R22 is the curvature radius of the second side of the second lens, R31 is the curvature radius of the first side of the third lens, R32 is the curvature radius of the second side of the third lens, R41 is the curvature radius of the first side of the fourth lens, d12 is the axial distance from the second side of the first lens to the first side of the second lens, d3 is the central thickness of the third lens on the optical axis, d1 is the central thickness of the first lens on the optical axis, d2 is the central thickness of the second lens on the optical axis, d23 is the axial distance from the second side of the second lens to the first side of the third lens, TL is the central distance from the first side of the first lens to the second side of the sixth lens on the optical axis in the optical lens, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, D62 is the clear aperture on the second side of the sixth lens corresponding to the maximum field angle of the optical lens.

16. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 0.6≤F3 / F≤1.25, 0.7≤|F6 / F|≤18, 0.153≤d3 / TTL≤0.195 and 0.88≤D62 / H≤1.06; Wherein, F3 is the effective focal length of the third lens, F is the total effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, d3 is the central thickness of the third lens on the optical axis, TTL is the total optical length of the optical lens, D62 is the clear aperture on the second side of the sixth lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens.

17. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 2.912≤TTL / F≤3.259, 4.341≤D11 / H / FOV×180°≤5.607, 0.047≤|(HF×θ) / (F×θ)|≤0.08, 0.079≤BFL / TTL≤0.233, 60.091°≤FOV×F / H≤62.291°, 6.378° / mm≤FOV / H≤6.491° / mm, 14.48≤TTL / H / FOV×180°≤16.151, 1.273≤F / H≤1.32, 3.855≤F1 / F≤6.857, -0.741≤F2 / F≤-0.585, 0.759≤F3 / F≤1.16, 0 .506≤|F4 / F|≤1.686, 0.349≤|F5 / F|≤3.295, 0.939≤|F6 / F|≤11.862, 0.97≤F45 / F≤585.845, -1.452≤Fpositive / Fnegative ≤ -0.183, -9.819 ≤ F1 / F2 ≤ -5.334, -1.498 ≤ (1 / F1 + 1 / F2) / (1 / F) ≤ -1.11, 0.973 ≤ R11 / D11 ≤ 1.418, 0.166 ≤ R11 / F1 ≤ 0.34, 0.188 ≤ R12 / F1 ≤ 0.501, 1.13 < R12 / R11 ≤ 1.476, -1.824 ≤ R21 / R22 ≤ -0.795, -1.2 ≤ R31 / R32 ≤-0.626, 1.099≤R31 / F≤1.717, 0.83≤R41 / F≤1.483, 3.895≤R12 / d12≤12.512, 0.161≤d3 / TTL≤0.186, 0.451≤d3 / F3≤0.699, 0.252≤(d1+d12+d2+d23) / TL≤0.366, 0.226≤(d4+d5) / TL≤0.41 and 0.915≤D62 / H≤1.029; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, D11 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, θ is the radian value of the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F45 is the combined focal length of the fourth lens and the fifth lens, Fpositive is the effective focal length of the positive lens in the fourth lens and the fifth lens, Fnegative is the effective focal length of the negative lens in the fourth lens and the fifth lens, R11 is the curvature radius of the first side of the first lens, R12 is the curvature radius of the second side of the first lens, R21 is the curvature radius of the first side of the second lens, R22 is the curvature radius of the second side of the second lens, R31 is the curvature radius of the first side of the third lens, R32 is the curvature radius of the second side of the third lens, R41 is the curvature radius of the first side of the fourth lens, d12 is the axial distance from the second side of the first lens to the first side of the second lens, d3 is the central thickness of the third lens on the optical axis, d1 is the central thickness of the first lens on the optical axis, d2 is the central thickness of the second lens on the optical axis, d23 is the axial distance from the second side of the second lens to the first side of the third lens, TL is the central distance from the first side of the first lens to the second side of the sixth lens on the optical axis in the optical lens, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, D62 is the clear aperture on the second side of the sixth lens corresponding to the maximum field angle of the optical lens.

18. An electronic device, comprising: Comprise: The optical lens according to any one of claims 1-17; And At least one of an imaging element and a light source; Wherein, the imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; Wherein, the light source is located on the second side of the optical lens, the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illuminated area is formed on the first side of the optical lens.

Images