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 negative optical power, the first side being a convex surface and the second side being a concave surface; a second lens with positive optical power, the first side being a concave surface and the second side being a convex surface; a third lens with negative optical power, the first side being a concave surface and the second side being a convex surface; a fourth lens with positive optical power; a fifth lens with optical power; a sixth lens with optical power, the sign of the optical power of the sixth lens being opposite to that of the fifth lens; a seventh lens with optical power; an eighth lens with optical power, the sign of the optical power of the eighth lens being opposite to that of the seventh lens; and a ninth lens with optical power; wherein the number of lenses with optical power in the optical lens is nine; and the optical lens satisfies 0.15 <= d45 / F <= 0.75.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical lens and an electronic device. BACKGROUND

[0002] In recent years, with the continuous development of automobile intelligence and automatic driving technology, the market of vehicle-mounted lenses continues to grow. In the next few years, the number of vehicle-mounted lenses will increase significantly to meet the higher level of automatic driving functions and safety requirements. Vehicle-mounted lenses refer to optical lenses installed on vehicles to achieve various functions, which may include, for example, interior-viewing lenses, rear-viewing lenses, front-viewing lenses, side-viewing lenses, surround-viewing lenses, etc.; among them, front-viewing lenses and side-viewing lenses are key components to realize ADAS (Advanced Driving Assistance System) and automatic driving functions, and the market demand is particularly strong.

[0003] Due to the complexity of actual road detection, the lens needs to have good recognition ability for objects, so the imaging quality of the lens itself is required to be high, and in order to adapt to more application scenarios, high resolution has become an urgent demand of people. In order to meet the higher imaging quality requirements, more lens structures are often selected, which will seriously affect the miniaturization of the lens; while meeting the imaging requirements of vehicle-mounted lenses, the smaller the lens is, the more convenient it is to install the vehicle-mounted lens, but this will lead to the contradiction between the high resolution and the miniaturization of ordinary vehicle-mounted lenses.

[0004] In addition, the ordinary vehicle-mounted lens also has the following problems: the overall size of the vehicle-mounted lens is reduced, which will affect the light flux size entering the lens, and the reduction of the light flux will affect the illumination, thereby causing the captured picture to be dark, which cannot meet the market demand; the vehicle-mounted lens applied to assist driving should reduce ghost image glare as much as possible to avoid serious ghost image halo affecting the judgment of the actual scene by the driver or the system; the vehicle-mounted lens applied to assist driving should also reduce chromatic aberration as much as possible to avoid serious chromatic aberration producing a diffraction spot, which affects the judgment of the actual scene; the CRA (Chief Ray Angle) design of the vehicle-mounted lens also needs to be matched with the chip, and the excessive CRA will bring serious color deviation problems. SUMMARY

[0005] Considering that the existing vehicle-mounted lenses have the following problems: they cannot meet the requirements of high resolution and miniaturization at the same time; the light transmission capability is not strong, and they cannot meet the demand in weak light environments such as night; they cannot meet the demand of weak ghost image; they cannot meet the demand of small chromatic aberration; and they cannot meet the requirement of small CRA of optical lenses. In order to at least solve one of the above problems, some embodiments of the present application provide an optical lens and an electronic device.

[0006] In a first aspect, the present application provides an optical lens comprising, in order from a first side to a second side along an optical axis: a first lens having negative optical power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens having positive optical power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having negative optical power, a first side of the third lens being concave, a second side of the third lens being convex; a fourth lens having positive optical power; a fifth lens having optical power; a sixth lens having optical power, a sign of the optical power of the sixth lens being opposite to a sign of the optical power of the fifth lens; a seventh lens having optical power; an eighth lens having optical power, a sign of the optical power of the eighth lens being opposite to a sign of the optical power of the seventh lens; and a ninth lens having optical power; wherein a number of lenses having optical power in the optical lens is nine; the optical lens satisfies: 0.15≤d45 / F≤0.75; wherein d45 is an on-axis distance from the second side of the fourth lens to the first side of the fifth lens, F is a total effective focal length of the optical lens.

[0007] In this way, the optical lens of the present application adopts nine lenses with optical power, the first side light first enters the first side of the first lens, and then exits through the second side of the first lens: the first lens has negative optical power, the first side is convex, and the second side is concave, which can collect and diverge the light of a large field of view, so that the light exiting through the second side of the first lens can ensure that the subsequent optical system has a larger light receiving surface, which is conducive to the aberration correction of the rear optical system for the light of a large angle, and high resolution is achieved. The divergent light exiting the first lens enters the second lens: the second lens has positive optical power, the first side is concave, and the second side is convex, which can effectively compress the light diverged by the first lens, so that the light smoothly enters the rear optical system; at the same time, the first side of the second lens and the second side of the first lens are matched with each other, which is conducive to the second lens to better receive the light in front, so that the light transitions smoothly, not only reduces the light sensitivity and improves the resolution quality, but also reduces the loss of light energy and improves the illumination of the peripheral field of view. The light exiting the second lens enters the third lens: the third lens has negative optical power, the first side is concave, and the second side is convex, which can diverge the light converging through the second lens, and disperse the central light and the edge light of each field of view, which is conducive to the regulation of the light by the rear lens and improves the resolution quality. The light exiting the third lens enters the fourth lens: the fourth lens has positive optical power, which can quickly converge the light with a divergent trend in front, so as to change the light trend, so that the light is closer to the optical axis, which is a key light trend turning point in the architecture of the optical lens, which is conducive to the effective convergence of the light and the smooth entry of the light into the rear optical system, reduces the rear aperture, and improves the resolution quality. The light exiting the fourth lens enters the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite optical power, which is more conducive to the smooth transition of the light and improves the resolution quality; at the same time, by controlling the ratio of the on-axis gap between the fourth lens and the fifth lens to the total effective focal length of the optical lens, i.e. 0.15≤d45 / F≤0.75, the ratio of the on-axis gap between the fourth lens and the fifth lens to the total effective focal length is controlled, which is not only conducive to the effective convergence of the light to reduce the rear aperture, but also conducive to the smooth transition of the light to the fifth lens, reduces the system sensitivity, and improves the imaging quality; in addition, by controlling the on-axis gap between the fourth lens and the fifth lens not to be too large, the height of the edge light can be effectively controlled, high relative illumination and small distortion are achieved, and the imaging quality is improved. The light exiting the sixth lens enters the seventh lens, the eighth lens and the ninth lens in turn: the seventh lens and the eighth lens have opposite optical power, so that the light can smoothly reach the imaging surface after passing through the seventh lens, the eighth lens and the ninth lens, and high resolution is achieved.

[0008] According to an example embodiment of the present application, the first side of the fourth lens is convex, and the second side of the fourth lens is convex or concave.

[0009] According to one exemplary embodiment of the present application, the fifth lens has a positive focal power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex or concave.

[0010] According to one exemplary embodiment of the present application, the fifth lens has a negative focal power, the first side surface of the fifth lens is concave or convex, and the second side surface of the fifth lens is concave.

[0011] According to one exemplary embodiment of the present application, the sixth lens has a negative focal power, the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is concave or convex.

[0012] According to one exemplary embodiment of the present application, the sixth lens has a negative focal power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0013] According to one exemplary embodiment of the present application, the sixth lens has a positive focal power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0014] According to one exemplary embodiment of the present application, the seventh lens has a positive focal power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex.

[0015] According to one exemplary embodiment of the present application, the seventh lens has a negative focal power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave.

[0016] According to one exemplary embodiment of the present application, the seventh lens has a negative focal power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex.

[0017] According to one exemplary embodiment of the present application, the eighth lens has a negative focal power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave or convex.

[0018] According to one exemplary embodiment of the present application, the eighth lens has a positive focal power, the first side surface of the eighth lens is convex or concave, and the second side surface of the eighth lens is convex.

[0019] According to one exemplary embodiment of the present application, the ninth lens has a negative focal power or a positive focal power.

[0020] According to one exemplary embodiment of the present application, the first side surface of the ninth lens is convex or concave, and the second side surface of the ninth lens is convex or concave.

[0021] According to one exemplary embodiment of the present application, the second lens and the third lens are bonded to each other or separated from each other.

[0022] According to an example embodiment of the present application, the fifth lens and the sixth lens are cemented to each other.

[0023] According to an example embodiment of the present application, the seventh lens and the eighth lens are cemented to each other.

[0024] According to an example embodiment of the present application, the optical lens satisfies: 0.025≤d45 / TTL≤0.12; wherein, d45 is the on-axis distance from the second side surface of the fourth lens to the first side surface of the fifth lens, and TTL is the total optical length of the optical lens.

[0025] According to an example embodiment of the present application, the optical lens satisfies: 0.015≤d89 / TTL≤0.07; wherein, d89 is the on-axis distance from the second side surface of the eighth lens to the first side surface of the ninth lens, and TTL is the total optical length of the optical lens.

[0026] According to an example embodiment of the present application, the optical lens satisfies: 0.3≤R21 / R32<1; wherein, R21 is the curvature radius of the first side surface of the second lens, and R32 is the curvature radius of the second side surface of the third lens.

[0027] According to an example embodiment of the present application, the optical lens satisfies: 4≤TTL / F≤7.5; wherein, TTL is the total optical length of the optical lens, and F is the total effective focal length of the optical lens.

[0028] According to an example embodiment of the present application, the optical lens satisfies: -4≤F1 / F≤-0.5; wherein, F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens.

[0029] According to an example embodiment of the present application, the optical lens satisfies: 2.5≤D / H / FOV×180°≤4.5; wherein, D is the clear aperture on the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, and FOV is the maximum field of view angle of the optical lens.

[0030] According to an example embodiment of the present application, the optical lens satisfies: 0.0005≤d34 / TTL≤0.006; wherein, d34 is the on-axis distance from the second side surface of the third lens to the first side surface of the fourth lens, and TTL is the total optical length of the optical lens.

[0031] According to an example embodiment of the present application, the optical lens satisfies: 0.5≤D92 / H≤1.5; wherein, D92 is the clear aperture on the second side surface of the ninth lens corresponding to the maximum field of view angle of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens.

[0032] According to an example embodiment of the present application, the optical lens satisfies: 0.6≤F / H≤0.85; wherein F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens.

[0033] According to an example embodiment of the present application, the optical lens satisfies: 0.05≤BFL / TTL≤0.15; wherein BFL is the optical back focal length of the optical lens, and TTL is the total track length of the optical lens.

[0034] According to an example embodiment of the present application, the combined focal length of the second lens and the third lens is negative.

[0035] According to an example embodiment of the present application, the combined focal length of the seventh lens and the eighth lens is positive.

[0036] According to an example embodiment of the present application, the fifth lens and the sixth lens are cemented with each other, and the seventh lens and the eighth lens are cemented with each other; the sum of the optical power of the cemented piece formed by the fifth lens and the sixth lens and the optical power of the cemented piece formed by the seventh lens and the eighth lens is positive.

[0037] According to an example embodiment of the present application, the optical lens satisfies: 1≤R11 / R12≤8; wherein R11 is the curvature radius of the first side surface of the first lens, and R12 is the curvature radius of the second side surface of the first lens.

[0038] According to an example embodiment of the present application, the optical lens satisfies: |(H-F×θ) / (F×θ)|≤0.1; wherein H is the image height corresponding to the maximum field angle of the optical lens, θ is the radian value of the maximum field angle of the optical lens, and F is the total effective focal length of the optical lens.

[0039] According to one example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 8≤TTL / H / FOVx180°≤12, 0.2≤F2 / F≤15, -18≤F3 / F≤-0.2, 0.2≤F4 / F≤25, 0.5≤|F5 / F|≤3.5, 0.3≤|F6 / F|≤3, 0.3≤|F7 / F|≤4.5, 0.3≤|F8 / F|≤9, |F9 / F|≥0.5, -2≤F2 / F3≤-0.3, -3.5≤F5 / F6≤-0.2, -4≤F7 / F8≤-0.01, 0.3≤R41 / F≤20, 50°≤(FOVxF) / H≤70°, 1≤|F56 / F|≤150, 0.1≤(d2+d3) / TTL≤0.25, 0.03≤(d5+d6) / TTL≤0.25, 0.03≤(d7+d8) / TTL≤0.25, 0.001≤d67 / TTL≤0.07, d45>d34, and R21>R32;

[0040] wherein TTL is the total optical length 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, F2 is the effective focal length of the second lens, F is the total effective focal length of the optical 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, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F9 is the effective focal length of the ninth lens, R41 is the radius of curvature of the first side surface of the fourth lens, F56 is the combined focal length of the fifth and sixth lenses, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d6 is the central thickness of the sixth lens on the optical axis, d7 is the central thickness of the seventh lens on the optical axis, d8 is the central thickness of the eighth lens on the optical axis, d67 is the on-axis distance from the second side surface of the sixth lens to the first side surface of the seventh lens, d45 is the on-axis distance from the second side surface of the fourth lens to the first side surface of the fifth lens, d34 is the on-axis distance from the second side surface of the third lens to the first side surface of the fourth lens, R21 is the radius of curvature of the first side surface of the second lens, and R32 is the radius of curvature of the second side surface of the third lens.

[0041] According to one example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 5.5≤TTL / F≤7, 9≤TTL / H / FOVx180°≤11, -3≤F1 / F≤-1, 0.5≤F2 / F≤12, -15≤F3 / F≤-0.5, 0.5≤F4 / F≤20, 0.7≤|F5 / F|≤3.2, 0.5≤|F6 / F|≤2.5, 0.5≤|F7 / F|≤4.2, 0.5≤|F8 / F|≤7, 0.5≤|F9 / F|≤500, -1.5≤F2 / F3≤-0.5, -2.8≤F5 / F6≤-0.4, -3.5≤F7 / F8≤-0.05, 0.03≤d45 / TTL≤0.11, 0.02≤d89 / TTL≤0.06, 3≤D / H / FOVx180°≤3.5, 0.5≤R41 / F≤15, 0.5≤R21 / R32≤0.8, 0.001≤d34 / TTL≤0.005, 0.8≤D92 / H≤1.1, 55°≤(FOVxF) / H≤65°, 0.7≤F / H≤0.75, 0.075≤BFL / TTL≤0.11, -100≤F23 / F≤-3, 1.5≤|F56 / F|≤120, 0.2≤F78 / F≤25, 0.25≤(1 / F56+1 / F78) / (1 / F)≤1.5, 1.5≤R11 / R12≤6.5, 0.005≤|(H-Fxθ) / (Fxθ)|≤0.07, 0.13≤(d2+d3) / TTL≤0.22, 0.05≤(d5+d6) / TTL≤0.2, 0.06≤(d7+d8) / TTL≤0.2, 0.005≤d67 / TTL≤0.065, and 0.18≤d45 / F≤0.66;

[0042] Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length 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, 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, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F9 is the effective focal length of the ninth lens, D is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, d45 is the axial distance from the second side of the fourth lens to the first side of the fifth lens, d89 is the axial distance from the second side of the eighth lens to the first side of the ninth lens, R41 is the curvature radius of the first side of the fourth lens, R21 is the curvature radius of the first side of the second lens, R32 is the curvature radius of the second side of the third lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, D92 is the clear aperture on the second side of the ninth lens corresponding to the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens; F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth 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, θ is the radian value of the maximum field angle of the optical lens, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d6 is the central thickness of the sixth lens on the optical axis, d7 is the central thickness of the seventh lens on the optical axis, d8 is the central thickness of the eighth lens on the optical axis, d67 is the axial distance from the second side of the sixth lens to the first side of the seventh lens.

[0043] According to an example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.5≤F4 / F≤5, 1≤|F9 / F|≤250, -80≤F23 / F≤-4, 2≤|F56 / F|≤100, 0.5≤F78 / F≤6, and 0.35≤(1 / F56+1 / F78) / (1 / F)≤0.9.

[0044] Wherein, F4 is the effective focal length of the fourth lens, F is the total effective focal length of the optical lens, F9 is the effective focal length of the ninth lens, F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth lens.

[0045] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 6.012TTL / F6.591, 9.586TTL / H / FOVx180°10.711, -2.529F1 / F-1.683, 1.761F2 / F8.298, -10.483F3 / F-1.907, 2.016F4 / F15.52, 1.028|F5 / F|2.57, 0.808|F6 / F|1.942, 0.845|F7 / F|3.065, 1.053|F8 / F|5.751, 2|F9 / F|162.158, -1.3F2 / F3-0.792, -2.183F5 / F6-0.694, -2.608F7 / F8-0.166, 0.04d45 / TTL0.089, 0.025d89 / TTL0.047, 3.243D / H / FOVx180°3.337, 1.524R41 / F11.645, 0.578R21 / R32 0.739, 0.002d34 / TTL0.004, 0.888D92 / H1.022, 58.224°(FOVxF) / H60.503°, 0.717F / H0.745, 0.082BFL / TTL0.098, -67.705F23 / F-5.472, 2.735|F56 / F|82.355, 1.264F78 / F15.614, 0.429(1 / F56+1 / F78) / (1 / F)0.767, 2.022R11 / R12 5.277, 0.016|(H-Fx0) / (Fx0)|0.053, 0.166(d2+d3) / TTL0.206, 0.088(d5+d6) / TTL0.176, 0.085(d7+d8) / TTL0.165, 0.011d67 / TTL0.048, and 0.255d45 / F0.544;

[0046] Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length 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, 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, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F9 is the effective focal length of the ninth lens, D is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, d45 is the axial distance from the second side of the fourth lens to the first side of the fifth lens, d89 is the axial distance from the second side of the eighth lens to the first side of the ninth lens, R41 is the curvature radius of the first side of the fourth lens, R21 is the curvature radius of the first side of the second lens, R32 is the curvature radius of the second side of the third lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, D92 is the clear aperture on the second side of the ninth lens corresponding to the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens; F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth 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, θ is the radian value of the maximum field angle of the optical lens, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d6 is the central thickness of the sixth lens on the optical axis, d7 is the central thickness of the seventh lens on the optical axis, d8 is the central thickness of the eighth lens on the optical axis, d67 is the axial distance from the second side of the sixth lens to the first side of the seventh lens.

[0047] The second aspect of the present application provides an electronic device comprising the optical lens in the above example embodiments, and at least one of an imaging element and a light source, wherein the imaging element is configured to convert an optical image or optical information formed by the optical lens into an electrical signal, and the light source is located on the second side of the optical lens, and light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0048] In a third aspect, the present application provides an optical lens comprising, in order from a first side to a second side along an optical axis, a first lens having negative refractive power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens having positive refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having negative refractive power, a first side of the third lens being concave, a second side of the third lens being convex; a fourth lens having positive refractive power; a fifth lens having refractive power; a sixth lens having refractive power, a sign of the refractive power of the sixth lens being opposite to a sign of the refractive power of the fifth lens; a seventh lens having refractive power; an eighth lens having refractive power, a sign of the refractive power of the eighth lens being opposite to a sign of the refractive power of the seventh lens; and a ninth lens having refractive power; wherein a number of lenses having refractive power in the optical lens is nine; the optical lens satisfies one or more of the following relationships: 0.025≤d45 / TTL≤0.12, 0.3≤R41 / F≤20, 0.6≤F / H≤0.85, d45>d34, and 0.15≤d45 / F≤0.75; wherein d45 is an on-axis distance from the second side of the fourth lens to the first side of the fifth lens, TTL is an overall optical length of the optical lens, R41 is a radius of curvature of the first side of the fourth lens, F is an overall effective focal length of the optical lens, H is an image height corresponding to a maximum field of view of the optical lens, and d34 is an on-axis distance from the second side of the third lens to the first side of the fourth lens.

[0049] In this way, the light rays are convergent after passing through the first lens, the second lens and the third lens, and then exiting through the fourth lens. The large distance between the fourth lens and the fifth lens is conducive to effectively converging the light rays, reducing the rear aperture, and smoothly transitioning the light rays to the fifth lens, reducing the system sensitivity and improving the imaging quality. Further, the optical lens of the present application adopts nine lenses with optical power. The first side light first enters the first side of the first lens, and then exits through the second side of the first lens. The first lens has negative optical power, the first side is convex, and the second side is concave, which can collect and diverge the light rays of a large field of view, so that the light rays exiting through the second side of the first lens can ensure a larger light receiving surface for the subsequent optical system under the same field of view angle, which is conducive to aberration correction of the large-angle light rays by the rear optical system, and realizes high resolution. The divergent light rays exiting through the first lens enter the second lens. The second lens has positive optical power, the first side is concave, and the second side is convex, which can effectively compress the light rays diverged by the first lens, so that the light rays smoothly enter the rear optical system. At the same time, the first side of the second lens and the second side of the first lens are matched with each other, which is conducive to better receiving the light rays in front of the second lens, so that the light rays are smoothly transitioned, not only reducing the light sensitivity and improving the resolution quality, but also reducing the loss of light energy and improving the illumination of the peripheral field of view. The light rays exiting through the second lens enter the third lens. The third lens has negative optical power, the first side is concave, and the second side is convex, which can diverge the light rays converging through the second lens, and disperse the central light rays and the edge light rays of each field of view, which is conducive to the regulation of the light rays by the rear lens and improves the resolution quality. The light rays exiting through the third lens enter the fourth lens. The fourth lens has positive optical power, which can quickly converge the light rays with a divergent trend in front, change the light ray trend, and make the light rays closer to the optical axis. It is a key light ray trend turning point in the optical lens architecture, which is conducive to effectively converging the light rays and smoothly entering the rear optical system, reducing the rear aperture and improving the resolution quality. At the same time, the first side of the fourth lens is set as a convex surface, and the ratio between the curvature radius of the first side of the fourth lens and the total effective focal length of the optical lens is controlled, i.e. 0.3≤R41 / F≤20, which controls the curvature radius of the first side of the convex fourth lens within a reasonable range, effectively converges the light rays into the rear optical system, reduces the rear aperture and the optical total length, increases the light flux, and improves the imaging quality.The light rays that are overall converging after exiting the fourth lens enter the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite signs of optical power, which is more conducive to the smooth transition of light rays and improves the resolving power; at the same time, by controlling the on-axis gap between the fourth lens and the fifth lens, the total optical length and the total effective focal length of the optical lens, and the on-axis gap between the third lens and the fourth lens, i.e. 0.025≤d45 / TTL≤0.12, d45>d34 and / or 0.15≤d45 / F≤0.75, not only controls the on-axis gap between the fourth lens and the fifth lens to be greater than the on-axis gap between the third lens and the fourth lens, which is conducive to effectively converging the light rays that are diverging in front, reduces the sensitivity of light deflection, and reduces the rear aperture, but also is conducive to the compact structure between the front lens and the rear lens, further realizes miniaturization while meeting high resolution, and also controls the ratio between the on-axis gap between the fourth lens and the fifth lens and the total effective focal length, which can ensure the smooth transition of light rays to the fifth lens, reduce the sensitivity of the system, and improve the imaging quality; in addition, by controlling the on-axis gap between the fourth lens and the fifth lens to be not too large, the height of the edge light can be effectively controlled, high relative illumination and small distortion can be realized, and the imaging quality can be improved. The light rays that exit the sixth lens enter the seventh lens, the eighth lens and the ninth lens in turn: the seventh lens and the eighth lens have opposite signs of optical power, so that the light rays can smoothly reach the imaging surface after passing through the seventh lens, the eighth lens and the ninth lens, and high resolution can be realized; at the same time, by controlling the ratio between the total effective focal length of the optical lens and the image height corresponding to the maximum field of view, i.e. 0.6≤F / H≤0.85, the total effective focal length of the optical lens and the image height corresponding to the maximum field of view are reasonably controlled, which is conducive to the optical system to meet high resolution while considering long focal length.

[0050] In a fourth aspect, the present application provides an optical lens comprising, in order from a first side to a second side along an optical axis, a first lens having negative refractive power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens having positive refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having negative refractive power, a first side of the third lens being concave, a second side of the third lens being convex; a fourth lens having positive refractive power; a fifth lens having refractive power; a sixth lens having refractive power, a sign of the refractive power of the sixth lens being opposite to a sign of the refractive power of the fifth lens; a seventh lens having refractive power; an eighth lens having refractive power, a sign of the refractive power of the eighth lens being opposite to a sign of the refractive power of the seventh lens; and a ninth lens having refractive power; wherein a number of lenses having refractive power in the optical lens is nine; the optical lens satisfies one or more of the following relationships: 0.3≤R21 / R32<1, -2≤F2 / F3≤-0.3, and R21>R32; wherein R21 is a radius of curvature of the first side of the second lens, R32 is a radius of curvature of the second side of the third lens, F2 is an effective focal length of the second lens, and F3 is an effective focal length of the third lens. In this way, the ratio range of the radii of curvature of the object side of the second lens and the image side of the third lens is reasonably controlled, the object side of the second lens is more curved than the image side of the third lens, which is conducive to the smooth transition of light to the third lens, appropriately separates the spacing between light, which is conducive to reducing distortion and improving edge relative illumination.

[0051] Further, the optical lens adopts nine lenses with optical power, the first side light first enters the first side of the first lens, and then exits through the second side of the first lens: the first lens has negative optical power, the first side is convex, and the second side is concave, which can collect and diverge the light of a large field of view, so that the light exiting through the second side of the first lens can ensure that the subsequent optical system has a larger light receiving surface, which is conducive to the aberration correction of the rear optical system for the light of a large angle, and realizes high resolution. The divergent light exiting the first lens enters the second lens: the second lens has positive optical power, the first side is concave, and the second side is convex, which can effectively compress the light diverged by the first lens, so that the light smoothly enters the rear optical system; at the same time, the first side of the second lens and the second side of the first lens are matched with each other, which is conducive to the second lens to better receive the light in front, so that the light transitions smoothly, not only reduces the light sensitivity and improves the resolution quality, but also reduces the loss of light energy and improves the illumination of the peripheral field of view. The light exiting the second lens enters the third lens: the third lens has negative optical power, the first side is concave, and the second side is convex, which can diverge the light converging through the second lens, and disperse the central light and the edge light of each field of view, which is conducive to the regulation of the light by the rear lens and improves the resolution quality; at the same time, by controlling the effective focal length and the curvature radius of the first side of the second lens and the effective focal length and the curvature radius of the second side of the third lens, i.e. 0.3≤R21 / R32<1, -2≤F2 / F3≤-0.3 and / or R21>R32, not only reasonably matches the effective focal lengths of the second lens and the third lens, which is conducive to the smooth transition of the light to the fourth lens, reduces the system sensitivity, and improves the imaging quality, but also reasonably controls the size and ratio range of the curvature radius of the first side of the second lens which is set to be concave and the curvature radius of the second side of the third lens which is set to be convex, so that the first side of the second lens is more curved than the second side of the third lens, which is conducive to the smooth transition of the light to the third lens, appropriately separates the distance between the lights, helps to reduce distortion, and improves the edge relative illumination of the optical lens. The light exiting the third lens enters the fourth lens: the fourth lens has positive optical power, which can quickly converge the light with a divergent trend in front, change the light trend, and make the light closer to the optical axis, which is a key light trend turning point in the architecture of the optical lens, which is conducive to the effective convergence of the light and the smooth entry of the light into the rear optical system, reduces the rear aperture, and improves the resolution quality. The light exiting the fourth lens with a convergent trend enters the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite signs of optical power, which is more conducive to the smooth transition of the light and improves the resolution quality. The light exiting the sixth lens enters the seventh lens, the eighth lens and the ninth lens in turn: the seventh lens and the eighth lens have opposite signs of optical power, so that the light can smoothly reach the imaging surface after the seventh lens, the eighth lens and the ninth lens, and realize high resolution.

[0052] A fifth aspect of the present application provides an optical lens comprising, in order from a first side to a second side along an optical axis: a first lens having negative refractive power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens having positive refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having negative refractive power, a first side of the third lens being concave, a second side of the third lens being convex; a fourth lens having positive refractive power; a fifth lens having refractive power; a sixth lens having refractive power, a sign of the refractive power of the sixth lens being opposite to a sign of the refractive power of the fifth lens; a seventh lens having refractive power; an eighth lens having refractive power, a sign of the refractive power of the eighth lens being opposite to a sign of the refractive power of the seventh lens; and a ninth lens having refractive power; wherein a number of lenses having refractive power in the optical lens is nine; the optical lens satisfies: 0.015≤d89 / TTL≤0.07 and / or 0.5≤D92 / H≤1.5; wherein d89 is an on-axis distance from the second side of the eighth lens to the first side of the ninth lens, TTL is an overall optical length of the optical lens, D92 is an entrance aperture on the second side of the ninth lens corresponding to a maximum field of view angle of the optical lens, and H is an image height corresponding to the maximum field of view angle of the optical lens.

[0053] With the arrangement, the interval between the eighth lens and the ninth lens is properly arranged, which is beneficial to the smooth transition of the front light to the ninth lens, the small light deflection angle, the reduction of system sensitivity, the reduction of light loss, the improvement of imaging quality, the further making of the light after the ninth lens to be approximately perpendicular to the imaging surface, and the realization of small CRA. Meanwhile, the interval between the eighth lens and the ninth lens is properly widened, the optical path of the reflected light between the lenses is increased, which is beneficial to the focusing of ghost image away from the image surface and the weakening of ghost image. Further, the optical lens adopts nine lenses with optical power, the first side light enters the first lens through the first side surface of the first lens and then exits through the second side surface of the first lens: the first lens has negative optical power, the first side surface is convex, and the second side surface is concave, which can collect and diverge the light of a large field of view, so that the light exiting through the second side surface of the first lens can ensure that the subsequent optical system has a larger light receiving surface, which is beneficial to the aberration correction of the rear optical system to the light of a large angle, and the realization of high resolution. The diverging light exiting from the first lens enters the second lens: the second lens has positive optical power, the first side surface is concave, and the second side surface is convex, which can effectively compress the light diverged by the first lens, so that the light smoothly enters the rear optical system; meanwhile, the first side surface of the second lens and the second side surface of the first lens are matched with each other, which is beneficial to the better acceptance of the front light by the second lens, so that the light is smoothly transitioned, which not only reduces the light sensitivity and improves the resolution quality, but also reduces the light energy loss and improves the illumination of the peripheral field of view. The light exiting from the second lens enters the third lens: the third lens has negative optical power, the first side surface is concave, and the second side surface is convex, which can diverge the light converging by the second lens, and disperse the central light and the edge light of each field of view, which is beneficial to the regulation of the light by the rear lens and the improvement of the resolution quality. The light exiting from the third lens enters the fourth lens: the fourth lens has positive optical power, which can quickly converge the light with a diverging trend in the front, so as to change the light trend, make the light closer to the optical axis, and is the key light trend turning point in the optical lens architecture, which is beneficial to the effective convergence of the light and the smooth entry of the light into the rear optical system, the reduction of the rear aperture, and the improvement of the resolution quality. The light with a converging trend exiting from the fourth lens enters the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite signs of optical power, which is more beneficial to the smooth transition of the light and the improvement of the resolution quality.The light rays emitted by the sixth lens enter the seventh lens, the eighth lens and the ninth lens in turn: the seventh lens and the eighth lens have opposite signs of optical power, so that the light rays can smoothly reach the imaging surface after passing through the seventh lens, the eighth lens and the ninth lens, realizing high resolution; at the same time, not only by controlling the ratio of the on-axis gap between the eighth lens and the ninth lens and the total optical length, that is, 0.015≤d89 / TTL≤0.07, reasonably controlling the on-axis gap of the eighth lens and the ninth lens, which is conducive to the smooth transition of the front light to the ninth lens, ensures that the light deflection angle is small, helps to reduce the system sensitivity, reduces the light loss, improves the imaging quality, further ensures that the light can approximately vertically reach the imaging surface after passing through the ninth lens, realizes small CRA, and can also appropriately pull apart the on-axis gap of the eighth lens and the ninth lens, so as to increase the optical path of the reflected light between the lenses, which is conducive to the focusing point of the ghost image away from the image surface and weakening the ghost image; and by controlling the ratio of the light aperture on the second side of the ninth lens corresponding to the maximum field angle of the optical lens and the image corresponding to the maximum field angle of the optical lens, that is, 0.5≤D92 / H≤1.5, the light aperture of the second side of the last lens is close to the image height of the optical lens, so that the deflection angle of the light reaching the imaging surface is small, which is conducive to realizing small CRA. BRIEF DESCRIPTION OF DRAWINGS

[0054] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the drawings. Among which:

[0055] Figure 1 The structure diagram of the optical lens according to Embodiment 1 of the application is shown;

[0056] Figure 2 The modulation transfer function curve (MTF) of the optical lens according to Embodiment 1 of the application is shown;

[0057] Figure 3 The structure diagram of the optical lens according to Embodiment 2 of the application is shown;

[0058] Figure 4 The modulation transfer function curve of the optical lens according to Embodiment 2 of the application is shown;

[0059] Figure 5 The structure diagram of the optical lens according to Embodiment 3 of the application is shown;

[0060] Figure 6 The modulation transfer function curve of the optical lens according to Embodiment 3 of the application is shown;

[0061] Figure 7A structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0062] Figure 8 A modulation transfer function curve of the optical lens according to Embodiment 4 of the present application is shown;

[0063] Figure 9 A structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0064] Figure 10 A modulation transfer function curve of the optical lens according to Embodiment 5 of the present application is shown;

[0065] Figure 11 A structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0066] Figure 12 A modulation transfer function curve of the optical lens according to Embodiment 6 of the present application is shown;

[0067] Figure 13 A structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0068] Figure 14 A modulation transfer function curve of the optical lens according to Embodiment 7 of the present application is shown;

[0069] Figure 15 A structural diagram of an optical lens according to Embodiment 8 of the present application is shown;

[0070] Figure 16 A modulation transfer function curve of the optical lens according to Embodiment 8 of the present application is shown;

[0071] Figure 17 A structural diagram of an optical lens according to Embodiment 9 of the present application is shown;

[0072] Figure 18 A modulation transfer function curve of the optical lens according to Embodiment 9 of the present application is shown;

[0073] Figure 19 A structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0074] Figure 20 A modulation transfer function curve of the optical lens according to Embodiment 10 of the present application is shown;

[0075] Figure 21 A structural diagram of an optical lens according to Embodiment 11 of the present application is shown;

[0076] Figure 22A modulation transfer function curve of the optical lens according to Embodiment 11 of the present application is shown;

[0077] Figure 23 A structural schematic diagram of the optical lens according to Embodiment 12 of the present application is shown;

[0078] Figure 24 A modulation transfer function curve of the optical lens according to Embodiment 12 of the present application is shown;

[0079] Figure 25 A structural schematic diagram of the optical lens according to Embodiment 13 of the present application is shown;

[0080] Figure 26 A modulation transfer function curve of the optical lens according to Embodiment 13 of the present application is shown;

[0081] Figure 27 A structural schematic diagram of the optical lens according to Embodiment 14 of the present application is shown;

[0082] Figure 28 A modulation transfer function curve of the optical lens according to Embodiment 14 of the present application is shown;

[0083] Figure 29 A structural schematic diagram of the optical lens according to Embodiment 15 of the present application is shown;

[0084] Figure 30 A modulation transfer function curve of the optical lens according to Embodiment 15 of the present application is shown;

[0085] Figure 31 A structural schematic diagram of the optical lens according to Embodiment 16 of the present application is shown;

[0086] Figure 32 A modulation transfer function curve of the optical lens according to Embodiment 16 of the present application is shown;

[0087] Figure 33 A structural schematic diagram of the optical lens according to Embodiment 17 of the present application is shown;

[0088] Figure 34 A modulation transfer function curve of the optical lens according to Embodiment 17 of the present application is shown;

[0089] Figure 35 A structural schematic diagram of the optical lens according to Embodiment 18 of the present application is shown;

[0090] Figure 36 A modulation transfer function curve of the optical lens according to Embodiment 18 of the present application is shown;

[0091] Figure 37A structural diagram of an optical lens according to Embodiment 19 of the present application is shown;

[0092] Figure 38 A modulation transfer function curve of the optical lens according to Embodiment 19 of the present application is shown;

[0093] Figure 39 A structural diagram of an optical lens according to Embodiment 20 of the present application is shown;

[0094] Figure 40 A modulation transfer function curve of the optical lens according to Embodiment 20 of the present application is shown;

[0095] Figure 41 A structural diagram of an optical lens according to Embodiment 21 of the present application is shown;

[0096] Figure 42 A modulation transfer function curve of the optical lens according to Embodiment 21 of the present application is shown;

[0097] Figure 43 A structural diagram of an optical lens according to Embodiment 22 of the present application is shown;

[0098] Figure 44 A modulation transfer function curve of the optical lens according to Embodiment 22 of the present application is shown;

[0099] Figure 45 A structural diagram of an optical lens according to Embodiment 23 of the present application is shown;

[0100] Figure 46 A modulation transfer function curve of the optical lens according to Embodiment 23 of the present application is shown. DETAILED DESCRIPTION

[0101] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements.

[0102] It should be noted that, in the present specification, the terms first, second, third, etc. are merely used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0103] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0104] In this document, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, 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 referred to as the first side surface of the lens, and the surface of each lens closest to the second side is referred to as the second side surface of the lens.

[0105] It should also be understood that the use of the terms “including”, “including” and / or “having” when used in this specification intends to convey the inclusion of the stated features, elements and / or components but does not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when describing the embodiments of the present application, the use of “may” means “one or more embodiments of the present application”. Also, the term “exemplary” is intended to refer to an example or illustration.

[0106] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that the terms should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0107] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0108] The features, principles, and other aspects of the present application are described in detail below.

[0109] The optical lens according to the exemplary embodiments of the present application can include, for example, nine lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, which are sequentially arranged from the first side to the second side along the optical axis.

[0110] In exemplary embodiments, the optical lens provided by the present application can be used as a light receiving lens or a light emitting lens. 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 cloud, etc. The light emitting lens is generally used to transmit light from a light emitting unit to the object side space. According to the effect of the light, 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 object information, etc.

[0111] It can be understood that when the optical lens provided by the present application is used as a light receiving lens such as a camera lens, a laser radar receiving end lens, a microscope lens or a telescope lens, the "first side" referred to herein can refer to the object side, and the "second side" can refer to the image side (such as the side where the photosensor or the retina is located), that is, the light from the object side can be imaged on the image side. For example, the camera lens can be a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. When the optical lens provided by the present application is used as a light emitting lens such as a projection lens or a laser radar transmitting end lens, the "first side" referred to herein can refer to the object side, and the "second side" can refer to the light source side.

[0112] In some possible embodiments, the optical lens provided by the present application can also simultaneously assume the functions of light receiving and light emitting. For example, the optical lens provided by the present application is used in a laser radar system sharing the light path, and the optical lens simultaneously assumes the functions of emitting laser and receiving radar echo light beams. For another example, the optical lens provided by the present application is used in a system integrating optical communication and radar, and the optical lens simultaneously assumes the functions of emitting modulated light signals and receiving radar echo light beams.

[0113] In exemplary embodiments, the first lens can have a negative focal power, the first side thereof can be a convex surface, and the second side thereof can be a concave surface. The first lens is a negative lens, which can collect and diverge light rays of a large field of view, so that the light rays exiting from the second side of the first lens can enable the subsequent optical system to have a larger light receiving surface under the same field of view angle condition. The first side of the first lens is provided as a convex surface, which can collect as much light rays of a large field of view as possible into the rear optical system, and is beneficial to the sliding of water droplets in actual application scenarios (such as rainy and snowy weather), thereby reducing the influence on the imaging quality. The second side of the first lens is provided as a concave surface, so that the light rays of a large angle from the first side of the first lens are rapidly diverged, which is beneficial to the aberration correction of the light rays of a large angle by the rear optical system, thereby realizing high resolution.

[0114] In the example embodiment, the second lens can have positive focal power, the first side thereof can be concave, and the second side thereof can be convex. The second lens is a positive lens, which can effectively compress the light rays diverging from the first lens, so that the light rays smoothly enter the rear optical system; meanwhile, the second lens is matched with the first lens, which is also conducive to the first lens to better diverge the light rays, thereby reducing the front aperture. The first side of the second lens is provided as a concave surface, which can be matched with the second side of the first lens provided as a concave surface, which is conducive to the second lens to better receive the light rays from the front, so that the light rays are smoothly transitioned, the light ray sensitivity is reduced, the resolution quality is improved, the light energy loss is reduced, and the illumination of the peripheral field of view is improved. The second side of the second lens is provided as a convex surface, which can further converge the light rays, reduce the incident height of the light rays at a large angle, thereby reducing the rear aperture of the lens, and realizing the miniaturization of the lens.

[0115] In the example embodiment, the third lens can have negative focal power, the first side thereof can be concave, and the second side thereof can be convex. The third lens is a negative lens, which can diverge the light rays converged by the second lens, disperse the central light rays and the edge light rays of each field of view, and is conducive to the regulation of the light rays by the rear lens, thereby improving the resolution quality. The first side of the third lens is provided as a concave surface, which can better receive the light rays from the front, so that the incident angle of the light rays entering the third lens is small, which is conducive to reducing the light energy loss, reducing the light ray sensitivity, and improving the resolution quality. The second side of the third lens is provided as a convex surface, which is matched with the first side provided as a concave surface, so that the light rays can be smoothly emitted after passing through the third lens, which is conducive to improving the field curvature and other axial aberrations.

[0116] It should be noted that the second lens and the third lens can be bonded to each other or separated from each other.

[0117] In the first example, the second lens and the third lens are bonded to each other to form a bonded lens, so that the light rays that have a diverging trend after passing through the first lens can be smoothly transitioned by the bonded lens formed by the second lens and the third lens, effectively reducing the light ray sensitivity, further effectively correcting chromatic aberration, and improving the imaging quality of the optical system.

[0118] It should be understood that the bonded lens can fully correct various aberrations of the optical system, so as to improve the resolution, optimize the optical performance such as distortion and CRA, and the like, under the premise of compact structure. In addition, the bonded lens has a higher refractive index (relative to the positive lens) as a negative lens, so that the light rays can be effectively and smoothly converged at the end, the light rays are smoothly arrived at the imaging surface, the overall weight and cost are reduced; the bonded lens can reduce the light loss caused by the reflection between the lenses, and the high and low refractive index is matched, which is conducive to the rapid transition of the light rays from the front, increases the aperture, and improves the light throughput; the bonded lens can reduce the air gap between the two lenses, so that the overall structure of the optical system is compact, and the tolerance sensitivity problem of the lens unit caused by the assembly process is reduced.

[0119] In the second example, the second lens and the third lens are separated from each other to increase the processing effect of one optical surface on the light, to help share the regulation pressure of the rear lens on the light, and to facilitate the improvement of the design freedom and the guarantee of high resolution.

[0120] In the exemplary embodiment, the fourth lens can have a positive focal power, the first side surface thereof can be a convex surface, and the second side surface thereof can be a convex surface or a concave surface.

[0121] In the first example, the fourth lens can have a positive focal power, the first side surface thereof can be a convex surface, and the second side surface thereof can be a convex surface. The fourth lens is a positive lens, which quickly converges the light rays having a divergent trend in the front as a whole, changes the light ray trend, and makes the light rays close to the optical axis, which is a key light ray trend turning point in the optical lens architecture, helps the light rays to be effectively converged and smoothly enter the rear optical system, reduces the rear aperture, and improves the resolution quality. The first side surface of the fourth lens is provided as a convex surface, which has a converging effect on the light rays, can further reduce aberration, helps to achieve high resolution, and improves the resolution capability of the optical system. The second side surface of the fourth lens is provided as a convex surface, which makes the edge field of view light rays continue to converge after passing through the fourth lens, helps to reduce the rear aperture, realizes miniaturization, and makes the rear light ray trend stable, reduces the light ray sensitivity, and improves the resolution quality.

[0122] In the second example, the fourth lens can have a positive focal power, the first side surface thereof can be a convex surface, and the second side surface thereof can be a concave surface. The fourth lens is a positive lens and has a convex-concave shape, which not only can converge the light rays through the first side surface provided as a convex surface, further reduce aberration, help to achieve high resolution, and improve the resolution capability of the optical system, but also can appropriately diverge the light rays converged through the first side surface by providing the second side surface as a concave surface, increase the system light aperture, make more light rays enter the rear optical system, and improve the relative illumination.

[0123] In the exemplary embodiment, the fifth lens can have a positive focal power or a negative focal power.

[0124] In the first example, the fifth lens can have a positive focal power, the first side surface thereof can be a convex surface, and the second side surface thereof can be a convex surface. The fifth lens is a positive lens and has a double-convex shape, which can further converge the front light rays into the rear optical system, helps to realize the miniaturization and high resolution of the rear end, and improves the resolution capability of the optical system.

[0125] In the second example, the fifth lens can have a positive focal power, the first side surface thereof can be a convex surface, and the second side surface thereof can be a concave surface. The fifth lens is a positive lens and has a convex-concave shape, which can slowly converge the light rays, helps to reduce the generation of aberration, reduces the sensitivity, and improves the resolution quality of the optical system.

[0126] In the third example, the fifth lens can have a negative focal power, and its first side surface can be, for example, a concave surface, and its second side surface can be, for example, a concave surface. The fifth lens is a negative lens and has a biconcave shape, can diverge the light rays converging in front, pull apart the edge light rays, improve the peripheral illuminance, and realize large image plane imaging.

[0127] In the fourth example, the fifth lens can have a negative focal power, and its first side surface can be, for example, a convex surface, and its second side surface can be, for example, a concave surface. The fifth lens is a negative lens and has a convex-concave shape, can appropriately diverge the light rays converging in front, make the light rays smoothly transition to the rear optical system, and improve the imaging quality.

[0128] In the exemplary embodiments, the sixth lens can have a positive focal power or a negative focal power.

[0129] In the first example, the sixth lens can have a negative focal power, and its first side surface can be, for example, a concave surface, and its second side surface can be, for example, a convex surface. The sixth lens is a negative lens and has a concave-convex shape, can appropriately diverge the light rays continuously converging through the fourth lens and the fifth lens, and make the light rays exit smoothly, which is beneficial to improving aberration and realizing high resolution.

[0130] In the second example, the sixth lens can have a negative focal power, and its first side surface can be, for example, a concave surface, and its second side surface can be, for example, a concave surface. The sixth lens is a negative lens and has a biconcave shape, can further diverge the light rays continuously converging through the fourth lens and the fifth lens, pull apart the edge light rays, improve the peripheral illuminance, and realize large image plane imaging.

[0131] In the third example, the sixth lens can have a negative focal power, and its first side surface can be, for example, a convex surface, and its second side surface can be, for example, a concave surface. The sixth lens is a negative lens and has a convex-concave shape, can effectively receive the light rays converging in front, reduce the deflection degree of the light rays, be beneficial to the smooth passing of the light rays, reduce the light energy loss at the interface, improve the relative illuminance, and reduce the sensitivity of the system.

[0132] In the fourth example, the sixth lens can have a positive focal power, and its first side surface can be, for example, a convex surface, and its second side surface can be, for example, a convex surface. The sixth lens is a positive lens and has a biconvex shape, can appropriately converge the light rays smoothly transitioning in front, be beneficial to realizing the miniaturization and high resolution of the rear end, and improve the resolving power of the optical system.

[0133] In the exemplary embodiments, the seventh lens can have a positive focal power or a negative focal power.

[0134] In the first example, the seventh lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The seventh lens is a positive lens and has a biconvex shape, and can continuously converge the light rays in front, effectively reduce the rear aperture, correct aberration of the system, improve image quality, and optimize optical performance such as distortion and CRA.

[0135] In the second example, the seventh lens can have negative focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The seventh lens is a negative lens and has a convex-concave shape, and can appropriately diverge the light rays entering the seventh lens to exit to the eighth lens, so that the subsequent optical system has a larger light receiving surface, which is beneficial to reducing aberration and improving optical performance.

[0136] In the third example, the seventh lens can have negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The seventh lens is a negative lens and has a concave-convex shape, and can better receive the light rays exiting in front, reduce light energy loss, and be beneficial to improving imaging quality.

[0137] In the exemplary embodiments, the eighth lens can have positive focal power or negative focal power; however, the eighth lens has opposite positive or negative properties of the seventh lens, and can smoothly transition the light rays to the optical system behind.

[0138] In the first example, the eighth lens can have negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The eighth lens is a negative lens and has a concave-convex shape, and can more reasonably diverge and converge the light rays to the rear lens, and adjust the height of the edge light rays on the image plane, which is beneficial to improving CRA and improving imaging quality.

[0139] In the second example, the eighth lens can have negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be concave. The eighth lens is a negative lens and has a biconcave shape, and can effectively diverge the light rays, adjust the angle of the light rays exiting the eighth lens, so that the light rays are more reasonably diverged to the rear lens, raise the height of the exiting light rays, ensure that the overlapping degree of the light rays in different fields of view on the rear lens is reduced, and enable the rear lens to better correct the aberration between different fields of view and reduce the curvature of field between different fields of view.

[0140] In the third example, the eighth lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The eighth lens is a positive lens and has a biconvex shape, and can further effectively converge the diverging light rays in front, and deflect the light rays to the optical axis direction, and reduce the rear aperture.

[0141] In the fourth example, the eighth lens can have positive refractive power, the first side surface thereof can be concave for example, and the second side surface thereof can be convex for example. The eighth lens is a positive lens and has a concave-convex shape, which can better receive the light rays emitted from the front, reduce the loss of light energy, and help improve the imaging quality. Meanwhile, the positive refractive power is also conducive to properly converging the light rays and reducing the rear aperture.

[0142] It is worth noting that the light rays first pass through the first lens, the second lens, and the third lens and then show a divergent trend, and then pass through the fourth lens to quickly converge the light rays, thereby realizing the turning of the light ray trend. At this time, a large amount of optical path difference is introduced, which makes it difficult to completely eliminate chromatic dispersion. In one aspect, by reasonably matching the refractive power and surface shape of the first lens, the second lens, the third lens, and the fourth lens, the light rays can enter the fifth lens more gently when emitted from the fourth lens. On the other hand, the sixth lens and the fifth lens can be cemented to form a cemented lens, and / or the seventh lens and the eighth lens can be cemented to form a cemented lens, which is more conducive to correcting chromatic aberration and making various aberrations of the optical system be fully corrected, so as to improve the resolution and optimize the optical performance such as distortion and CRA under the premise of compact structure.

[0143] In addition, the cementing of the fifth lens and the sixth lens and the cementing of the seventh lens and the eighth lens can effectively eliminate the influence of ghost images on the lens, so that the lens can ensure high resolution quality on the basis of eliminating ghost images.

[0144] In the exemplary embodiments, the ninth lens can have positive refractive power or negative refractive power.

[0145] In the first example, the ninth lens can have negative refractive power, the first side surface thereof can be convex for example, and the second side surface thereof can be concave for example. The ninth lens is a negative lens, which can diverge the light rays emitted from the eighth lens, so as to further diverge the light rays in front and increase the illumination of the peripheral field of view, thereby improving the resolution quality. The first side surface of the ninth lens is set to be convex, so that the light rays have a small incidence angle, which is conducive to more light rays entering the optical system and achieving high flux. Meanwhile, the front optical system can converge the incident light rays, quickly reach the image plane, and facilitate the realization of short TTL. The second side surface of the ninth lens is set to be concave, which can diverge the central light rays so that the light rays can reach a higher imaging position. Meanwhile, the peripheral light rays are convergent due to the reverse curvature, which can reduce the incidence angle of the light rays entering the chip, help improve the illumination and reduce CRA, and improve the imaging quality.

[0146] In the second example, the ninth lens can have a negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be concave. The ninth lens is a negative lens, and the first side surface thereof is concave, which can diverge the light rays converging in front, reduce the optical path difference, and improve the imaging quality. The second side surface of the ninth lens is concave, which can diverge the central light rays, so that the light rays can reach a higher imaging position; meanwhile, the reverse bending of the periphery can make the peripheral light rays converge, so as to reduce the incidence angle of the light rays into the chip, which is helpful to improve the illumination and reduce the CRA, and improve the imaging quality.

[0147] In the third example, the ninth lens can have a negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The ninth lens is a negative lens, and the first side surface thereof is concave, which can diverge the light rays converging in front, so that the light rays reach a higher imaging position, realize large image surface imaging, and improve the imaging quality. The second side surface of the ninth lens is convex, which can appropriately converge the light rays diverged via the first side surface of the eighth lens, so as to realize a small rear end while meeting the high resolution.

[0148] In the fourth example, the ninth lens can have a positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The ninth lens is a positive lens, which can further converge the light rays in front, shorten the distance to the imaging surface, realize miniaturization, reduce the light loss, and improve the imaging quality. The first side surface of the ninth lens is convex, so that the incidence angle of the light rays is small, which is conducive to more light rays entering the optical system, realizes high flux effect; meanwhile, it is conducive to the convergence of the incident light rays transmitted by the front optical system, quickly reaches the image surface, and is conducive to realizing a short TTL. The second side surface of the ninth lens is concave, which can diverge the central light rays, so that the light rays can reach a higher imaging position; meanwhile, the reverse bending of the periphery can make the peripheral light rays converge, so as to reduce the incidence angle of the light rays into the chip, which is helpful to improve the illumination and reduce the CRA, and improve the imaging quality.

[0149] In the fifth example, the ninth lens can have a positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The first side surface of the ninth lens is convex, so that the incidence angle of the light rays is small, which is conducive to more light rays entering the optical system, realizes high flux effect; meanwhile, it is conducive to the convergence of the incident light rays transmitted by the front optical system, quickly reaches the image surface, and is conducive to realizing a short TTL. The second side surface of the ninth lens is convex, which can appropriately converge the light rays in front, and reduce the rear end diameter.

[0150] In the example embodiment, the optical lens can further include a diaphragm, which can be disposed between the fourth lens and the fifth lens, for example. By disposing the diaphragm between the fourth lens and the fifth lens, the light rays entering the optical system can be effectively condensed, the lens aperture at the front and rear ends of the optical system can be reduced, the light throughput can be increased, and the sensitivity of the optical lens during assembly can be reduced. It should be understood that the diaphragm disposed between the fourth lens and the fifth lens is only exemplary, and the present application does not specifically limit this. According to actual needs, the diaphragm can also be disposed at other positions.

[0151] In the example embodiment, the optical lens can use at least one aspheric lens. For example, the ninth lens can be an aspheric lens, which can smoothly transition the light rays to the imaging surface, correct the system astigmatism and field curvature, and improve the resolving power of the optical system, especially reduce the large field aberration. It should be understood that the aspheric lens can also be molded to achieve cost reduction without affecting the temperature performance.

[0152] In the example embodiment, the first side surface and the second side surface of the ninth lens can have at least one inflection point. With this arrangement, the aberrations of the central field of view and the edge field of view can be balanced, and the resolving power can be improved.

[0153] In the example embodiment, the optical lens can further include a filter between the ninth lens and the imaging surface to filter light rays with different wavelengths. It should be understood that the optical lens can also dispose a protective glass between the filter and the imaging surface according to actual needs to prevent the internal elements (e.g., a chip) of the optical lens from being damaged.

[0154] In the example embodiment, the optical lens can further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0155] In the example embodiment, the total optical length TTL of the optical lens and the total effective focal length F of the optical lens can satisfy: 4≤TTL / F≤7.5. Preferably, 5.5≤TTL / F≤7. Further, 6.012≤TTL / F≤6.591. By controlling the ratio between the total optical length and the total effective focal length of the optical lens, the miniaturization and long focal length can be achieved. It should be understood that the preferred range (e.g., 5.5≤TTL / F≤7) and the further range (e.g., 6.012≤TTL / F≤6.591) of each relationship disclosed in the present application can achieve better effects and higher imaging quality.

[0156] In the example embodiments, the optical total length TTL 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: 8≤TTL / H / FOVx180°≤12. Preferably, 9≤TTL / H / FOVx180°≤11. Further, 9.586≤TTL / H / FOVx180°≤10.711. By controlling the relationship, the optical total length, the maximum field of view, and the image height corresponding to the maximum field of view of the optical lens are reasonably controlled, which is conducive to miniaturization and also takes into account large field of view and large image surface.

[0157] In the example embodiments, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -4≤F1 / F≤-0.5. Preferably, -3≤F1 / F≤-1. Further, -2.529≤F1 / F≤-1.683. By controlling the relationship, the effective focal length of the first lens is controlled to be negative and small in absolute value, which is conducive to collecting large field of view light, so that the light can enter the rear optical system well after being diverged by the first lens, and long focal length is achieved.

[0158] In the example embodiments, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: 0.2≤F2 / F≤15. Preferably, 0.5≤F2 / F≤12. Further, 1.761≤F2 / F≤8.298. By controlling the relationship, the effective focal length of the second lens is controlled, which can effectively converge the light diverged by the first lens, and is conducive to achieving small aperture at the front end, and the light can be smoothly transferred to the third lens after passing through the second lens, which is conducive to improving imaging quality.

[0159] In the example embodiments, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: -18≤F3 / F≤-0.2. Preferably, -15≤F3 / F≤-0.5. Further, -10.483≤F3 / F≤-1.907. By controlling the relationship, the effective focal length of the third lens is controlled, which can well receive the light emitted by the second lens, appropriately diverge the light, and pull up the height of the edge light, further improve the relative luminance, and improve the imaging quality.

[0160] In the example embodiments, 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≤25. Preferably, 0.5≤F4 / F≤20. Further, 2.016≤F4 / F≤15.52. By controlling the relationship, the effective focal length of the fourth lens is controlled, which can effectively converge the diverging light in front, so that the light can enter the rear optical system smoothly, improve the imaging quality, and achieve miniaturization.

[0161] It is worth noting that, after excluding the following embodiments 9 and 10, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can also satisfy: 0.5≤F4 / F≤5, which can make the light converging effect better and ensure better miniaturization effect.

[0162] In the example embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.5≤|F5 / F|≤3.5. Preferably, 0.7≤|F5 / F|≤3.2. Further, 1.028≤|F5 / F|≤2.57. By controlling the relationship, the absolute ratio of the effective focal length of the fifth lens and the total effective focal length is controlled, which is beneficial to better regulate the light trend, so that the light can enter the rear optical system better, and the imaging quality is improved.

[0163] In the example embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: 0.3≤|F6 / F|≤3. Preferably, 0.5≤|F6 / F|≤2.5. Further, 0.808≤|F6 / F|≤1.942. By controlling the relationship, the absolute ratio of the effective focal length of the sixth lens and the total effective focal length is controlled, which is beneficial to better regulate the light trend, so that the light can enter the rear optical system better, and the imaging quality is improved.

[0164] In the example embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens can satisfy: 0.3≤|F7 / F|≤4.5. Preferably, 0.5≤|F7 / F|≤4.2. Further, 0.845≤|F7 / F|≤3.065. By controlling the relationship, the absolute ratio of the effective focal length of the seventh lens and the total effective focal length is controlled, which is beneficial to better regulate the light trend, so that the light can enter the rear optical system better, and the imaging quality is improved.

[0165] In the example embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens can satisfy: 0.3≤|F8 / F|≤9. Preferably, 0.5≤|F8 / F|≤7. Further, 1.053≤|F8 / F|≤5.751. By controlling the relationship, the absolute ratio of the effective focal length of the eighth lens and the total effective focal length is controlled, which is beneficial to better regulate the light trend, so that the light can enter the rear optical system better, and the imaging quality is improved.

[0166] In the example embodiments, the effective focal length F9 of the ninth lens and the total effective focal length F of the optical lens can satisfy: |F9 / F|≥0.5. Preferably, 0.5≤|F9 / F|≤500. More preferably, 1≤|F9 / F|≤250. Further, 2≤|F9 / F|≤162.158. By controlling the relationship, the absolute value of the ratio of the effective focal length of the ninth lens to the total effective focal length is controlled, so that the light rays emitted through the eighth lens can approximately vertically reach the imaging plane after passing through the ninth lens, which is beneficial to achieve small CRA and improve imaging quality. It should be understood that the greater the absolute value of the effective focal length of the ninth lens, the smaller the influence on the light rays; for example, in the following embodiment 23, the absolute value of the effective focal length of the ninth lens is 1100.081, and when the absolute value of the effective focal length of the ninth lens is greater than 1100.081, especially when it is infinite, the ninth lens has little effect on the light rays, which is beneficial to the smooth transition of the light rays.

[0167] In the example embodiments, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens can satisfy: -2≤F2 / F3≤-0.3. Preferably, -1.5≤F2 / F3≤-0.5. Further, -1.3≤F2 / F3≤-0.792. By controlling the relationship, the focal length of the second lens and the third lens is reasonably controlled, which is beneficial to the smooth transition of the light rays to the fourth lens, reduces the sensitivity of the system, and improves the imaging quality.

[0168] In the example embodiments, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens can satisfy: -3.5≤F5 / F6≤-0.2. Preferably, -2.8≤F5 / F6≤-0.4. Further, -2.183≤F5 / F6≤-0.694. By controlling the relationship, the focal length of the fifth lens and the sixth lens is reasonably controlled, which can effectively correct the chromatic aberration of the entire optical system and improve the imaging quality.

[0169] In the example embodiments, the effective focal length F7 of the seventh lens and the effective focal length F8 of the eighth lens can satisfy: -4≤F7 / F8≤-0.01. Preferably, -3.5≤F7 / F8≤-0.05. Further, -2.608≤F7 / F8≤-0.166. By controlling the relationship, the focal length of the seventh lens and the eighth lens is reasonably controlled, which can effectively correct the chromatic aberration of the entire optical system and improve the imaging quality.

[0170] In the example embodiment, the axial distance d45 from the second side surface of the fourth lens to the first side surface of the fifth lens and the total optical length TTL of the optical lens can satisfy: 0.025≤d45 / TTL≤0.12. Preferably, 0.03≤d45 / TTL≤0.11. Further, 0.04≤d45 / TTL≤0.089. By controlling the relationship, the overall light rays exiting through the fourth lens have a converging trend, and the larger air gap between the fourth lens and the fifth lens is beneficial to effectively converge the light rays, reduce the rear aperture, and facilitate the compact structure between the front end lens and the rear end lens, further achieving miniaturization while satisfying high resolution.

[0171] In the example embodiment, the axial distance d89 from the second side surface of the eighth lens to the first side surface of the ninth lens and the total optical length TTL of the optical lens can satisfy: 0.015≤d89 / TTL≤0.07. Preferably, 0.02≤d89 / TTL≤0.06. Further, 0.025≤d89 / TTL≤0.047. By controlling the relationship, the air gap between the eighth lens and the ninth lens is reasonably set, which is beneficial to the smooth transition of the front light rays to the ninth lens, the smaller light ray deflection angle, the reduction of system sensitivity, the reduction of light loss, the improvement of imaging quality, and the realization of small CRA, so that the light rays can approximately vertically reach the imaging surface after passing through the ninth lens; at the same time, the distance between the eighth lens and the ninth lens is appropriately increased, and the optical path of the reflected light between the lenses is increased, which is beneficial to the focusing of ghost images away from the image surface and the weakening of ghost images.

[0172] In the example embodiment, the light passing aperture D on the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens can satisfy: 2.5≤D / H / FOV×180°≤4.5. Preferably, 3≤D / H / FOV×180°≤3.5. Further, 3.243≤D / H / FOV×180°≤3.337. By controlling the relationship, the front end aperture of the optical lens, the maximum field of view angle of the optical lens, and the corresponding image height are reasonably controlled, which is beneficial to satisfy high resolution while realizing small aperture at the front end of the lens, and taking into account large field of view and large image surface.

[0173] In the example embodiment, the radius of curvature R41 of the first side surface of the fourth lens and the total effective focal length F of the optical lens can satisfy: 0.3≤R41 / F≤20. Preferably, 0.5≤R41 / F≤15. Further, 1.524≤R41 / F≤11.645. By controlling the relationship, the radius of curvature range of the first side surface of the fourth lens which is set as convex is controlled, which is beneficial to effectively converge the light rays into the rear optical system, reduce the rear end aperture and the total optical length, increase the light passing amount, and improve the imaging quality.

[0174] In exemplary embodiments, the radius of curvature R21 of the first side surface of the second lens and the radius of curvature R32 of the second side surface of the third lens can satisfy: 0.3≤R21 / R32<1. Preferably, 0.5≤R21 / R32≤0.8. Further, 0.578≤R21 / R32≤0.739. By controlling the relationship, the ratio range of the radius of curvature of the first side surface of the second lens and the radius of curvature of the second side surface of the third lens is reasonably controlled, so that the first side surface of the second lens is more curved than the second side surface of the third lens, which is conducive to the smooth transition of light to the third lens, appropriately pulls apart the spacing between the light, helps to reduce distortion, and improves the edge relative illumination of the optical lens.

[0175] In exemplary embodiments, the on-axis distance d34 from the second side surface of the third lens to the first side surface of the fourth lens and the total optical length TTL of the optical lens can satisfy: 0.0005≤d34 / TTL≤0.006. Preferably, 0.001≤d34 / TTL≤0.005. Further, 0.002≤d34 / TTL≤0.004. By controlling the relationship, the air gap between the third lens and the fourth lens is reduced, so that the light can quickly enter the rear optical system, reduce light loss, improve imaging quality, and at the same time, the front-end structure is compact, leaving space for the design of the rear-end lens to increase the design freedom.

[0176] In exemplary embodiments, the light passing aperture D92 on the second side surface of the ninth lens corresponding to the maximum field of view angle of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens can satisfy: 0.5≤D92 / H≤1.5. Preferably, 0.8≤D92 / H≤1.1. Further, 0.888≤D92 / H≤1.022. By controlling the relationship, the light passing aperture of the second side surface of the ninth lens is close to the image height, which ensures that the deflection angle of the light reaching the imaging surface is small, which is conducive to realizing small CRA.

[0177] In exemplary embodiments, the maximum field of view angle 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 angle of the optical lens can satisfy: 50°≤(FOVxF) / H≤70°. Preferably, 55°≤(FOVxF) / H≤65°. Further, 58.224°≤(FOVxF) / H≤60.503°. By controlling the relationship, the total effective focal length, the image height, and the field of view angle of the optical lens are controlled, which is conducive to meeting high resolution while realizing long focus and taking into account large field of view characteristics.

[0178] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.6≤F / H≤0.85. Preferably, 0.7≤F / H≤0.75. Further, 0.717≤F / H≤0.745. By controlling the relationship, the total effective focal length and the image height of the optical lens are reasonably controlled, which is conducive to the optical system to meet high resolution while taking into account long focal length.

[0179] In the example embodiments, the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.05≤BFL / TTL≤0.15. Preferably, 0.075≤BFL / TTL≤0.11. Further, 0.082≤BFL / TTL≤0.098. By controlling the relationship, the optical back focal length and the total optical length TTL of the optical lens are reasonably controlled, which is conducive to flexible adjustment of the lens thickness and air gap, achieving miniaturization while taking into account appropriate back focal length.

[0180] In the example embodiments, the combined focal length F23 of the second lens and the third lens and the total effective focal length F of the optical lens can satisfy: F23 / F<0; that is, the combined focal length F23 of the second lens and the third lens is negative. Preferably, -100≤F23 / F≤-3. More preferably, -80≤F23 / F≤-4. Further, -67.705≤F23 / F≤-5.472. By controlling the relationship, the combined focal length of the second lens and the third lens is controlled to be negative, further diverging light, increasing light throughput, and improving relative illumination. In addition, by further controlling the combined focal length of the second lens and the third lens within a reasonable range, it is conducive to smooth transition of light, reduces light loss, and improves imaging quality.

[0181] In the example embodiments, the combined focal length F56 of the fifth lens and the sixth lens and the total effective focal length F of the optical lens can satisfy: 1≤|F56 / F|≤150. Preferably, 1.5≤|F56 / F|≤120. More preferably, 2≤|F56 / F|≤100. Further, 2.735≤|F56 / F|≤82.355. By controlling the relationship, the combined focal length of the fifth lens and the sixth lens is controlled within a reasonable range, which can effectively control the light path into the cemented lens, reduce aberration caused by large-angle light entering the front end, and improve resolution performance.

[0182] In the exemplary embodiments, the combined focal length F78 of the seventh lens and the eighth lens and the total effective focal length F of the optical lens can satisfy: F78 / F>0; that is, the combined focal length F78 of the seventh lens and the eighth lens is positive. Preferably, 0.2≤F78 / F≤25. Further, 1.264≤F78 / F≤15.614. By controlling the relationship, the combined focal length of the seventh lens and the eighth lens is controlled to be positive, further converging the light rays, which is beneficial to reducing the rear aperture; in addition, the combined focal length of the seventh lens and the eighth lens is further controlled to be within a reasonable range, adjusting the exit angle of the light rays, so that the light rays can enter the ninth lens better, reducing light loss, and improving the imaging quality.

[0183] It is worth noting that, after excluding the following embodiments 22 and 23, the combined focal length F78 of the seventh lens and the eighth lens and the total effective focal length F of the optical lens can also satisfy: 0.5≤F78 / F≤6, which can make the light rays converge better and ensure higher imaging quality.

[0184] In the exemplary embodiments, the combined focal length F56 of the fifth lens and the sixth lens, the combined focal length F78 of the seventh lens and the eighth lens, and the total effective focal length F of the optical lens can satisfy: (1 / F56+1 / F78) / (1 / F)>0; that is, the sum of the optical power 1 / F56 of the cemented member formed by the fifth lens and the sixth lens and the optical power 1 / F78 of the cemented member formed by the seventh lens and the eighth lens is positive. Preferably, 0.25≤(1 / F56+1 / F78) / (1 / F)≤1.5. More preferably, 0.35≤(1 / F56+1 / F78) / (1 / F)≤0.9. Further, 0.429≤(1 / F56+1 / F78) / (1 / F)≤0.767. By controlling the relationship, the combined focal length of the fifth lens and the sixth lens and the combined focal length of the seventh lens and the eighth lens are reasonably set, so that the light rays can be slowly converged to the ninth lens after passing through the fourth lens, which ensures that the light rays have a small deflection angle and low sensitivity, which is beneficial to improving the imaging quality; at the same time, the angle of the light rays is adjusted in advance, which is beneficial to the light rays to reach the imaging surface approximately vertically, realizing small CRA.

[0185] In the example embodiment, the radius of curvature R11 of the first side surface of the first lens and the radius of curvature R12 of the second side surface of the first lens can satisfy: 1≤R11 / R12≤8. Preferably, 1.5≤R11 / R12≤6.5. Further, 2.022≤R11 / R12≤5.277. By controlling the relationship, the ratio range of the curvatures of the first side surface and the second side surface of the first lens is reasonably controlled, which is conducive to collecting light rays with a large field of view into the optical system to achieve large-angle imaging. At the same time, when the second side surface of the first lens has a larger curvature, the edge light rays are deflected more, and the edge light rays are divergent, which is conducive to reducing the front aperture while achieving a large field of view.

[0186] In the example embodiment, the image height H corresponding to the maximum field of view angle 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 angle of the optical lens can satisfy: |(H-Fxθ) / (Fxθ)|≤0.1. Preferably, 0.005≤|(H-Fxθ) / (Fxθ)|≤0.07. Further, 0.016≤|(H-Fxθ) / (Fxθ)|≤0.053. By controlling the relationship, the image height, the total effective focal length, and the radian value corresponding to the maximum field of view angle of the optical lens are reasonably controlled, which is conducive to achieving small distortion while meeting high resolution, and more truly restoring the captured objects and scenes.

[0187] In the example embodiment, the central thickness d2 of the second lens on the optical axis, the central thickness d3 of the third lens on the optical axis, and the total optical length TTL of the optical lens can satisfy: 0.1≤(d2+d3) / TTL≤0.25. Preferably, 0.13≤(d2+d3) / TTL≤0.22. Further, 0.166≤(d2+d3) / TTL≤0.206. By controlling the relationship, the central thicknesses of the second lens and the third lens are reasonably controlled, and the light ray trend is adjusted, which is conducive to achieving miniaturization while meeting high resolution.

[0188] In the example embodiment, the central thickness d5 of the fifth lens on the optical axis, the central thickness d6 of the sixth lens on the optical axis, and the total optical length TTL of the optical lens can satisfy: 0.03≤(d5+d6) / TTL≤0.25. Preferably, 0.05≤(d5+d6) / TTL≤0.2. Further, 0.088≤(d5+d6) / TTL≤0.176. By controlling the relationship, the central thicknesses of the fifth lens and the sixth lens are reasonably controlled, and the light ray trend is adjusted, which is conducive to achieving miniaturization while meeting high resolution.

[0189] In exemplary embodiments, the center thickness d7 of the seventh lens on the optical axis, the center thickness d8 of the eighth lens on the optical axis, and the total optical length TTL of the optical lens can satisfy: 0.03≤(d7+d8) / TTL≤0.25. Preferably, 0.06≤(d7+d8) / TTL≤0.2. Further, 0.085≤(d7+d8) / TTL≤0.165. By controlling the relationship, the center thickness of the seventh lens and the eighth lens is reasonably controlled, the light path is adjusted, and it is beneficial to realize miniaturization while meeting high resolution.

[0190] In exemplary embodiments, the axial distance d67 from the second side surface of the sixth lens to the first side surface of the seventh lens and the total optical length TTL of the optical lens can satisfy: 0.001≤d67 / TTL≤0.07. Preferably, 0.005≤d67 / TTL≤0.065. Further, 0.011≤d67 / TTL≤0.048. By controlling the relationship, the air gap between the sixth lens and the seventh lens is reasonably controlled, which is beneficial for the light to smoothly enter the seventh lens after passing through the sixth lens, reduces light loss, and improves imaging quality while the structure is compact.

[0191] In exemplary embodiments, the axial distance d45 from the second side surface of the fourth lens to the first side surface of the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.15≤d45 / F≤0.75. Preferably, 0.18≤d45 / F≤0.66. Further, 0.255≤d45 / F≤0.544. By controlling the relationship, the light rays are convergent as a whole when exiting the fourth lens, and the distance between the fourth lens and the fifth lens is large, which is beneficial for the light rays to be effectively converged to reduce the rear aperture, and is also beneficial for the light rays to transition to the fifth lens smoothly, reduces the sensitivity of the system, and facilitates the improvement of imaging quality; in addition, by controlling the axial gap between the fourth lens and the fifth lens not to be too large, the height of the edge light can be effectively controlled, high relative luminance and small distortion are realized, and the imaging quality is improved.

[0192] In exemplary embodiments, the axial distance d45 from the second side surface of the fourth lens to the first side surface of the fifth lens is greater than the axial distance d34 from the second side surface of the third lens to the first side surface of the fourth lens, which is beneficial for effectively converging the light rays that are divergent in front, reduces the deflection of the light rays, reduces the sensitivity, reduces the light loss, effectively controls the light path, and further improves the imaging quality.

[0193] In the example embodiment, the radius of curvature R21 of the first side surface of the second lens is greater than the radius of curvature R32 of the second side surface of the third lens, so that the first side surface provided as a concave surface in the second lens is more curved than the second side surface provided as a convex surface in the third lens, which is conducive to better divergence of light rays, ensures that the edge light rays are more abundant, helps to improve the relative illumination, and further improves the imaging quality.

[0194] It is worth noting that the present application can be matched by the relationship 0.025≤d45 / TTL≤0.12, the relationship 0.3≤R41 / F≤20, the relationship 0.6≤F / H≤0.85, the relationship d45>d34, and the relationship 0.15≤d45 / F≤0.75, which is conducive to achieving high resolution while improving the light flux and the relative illumination, reducing distortion, and taking into account miniaturization.

[0195] In addition, the present application can also be matched by the relationship 0.3≤R21 / R32<1, the relationship -2≤F2 / F3≤-0.3, and the relationship R21>R32, which is conducive to achieving high resolution while improving the relative illumination and taking into account small distortion.

[0196] In addition, the present application can also be matched by the relationship 0.015≤d89 / TTL≤0.07 and the relationship 0.5≤D92 / H≤1.5, which is conducive to achieving small CRA while weakening ghosting and improving imaging quality.

[0197] The optical lens according to the above embodiments of the present application can adopt a plurality of lenses, for example, the nine lenses described above. By reasonably allocating the optical parameters of each lens, one or more advantages of small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, small distortion, small chief ray angle, high illumination, and processability of the optical lens are achieved, and various application end chips, such as vehicle-mounted chips, can be well matched, and the dark corner phenomenon can be well suppressed. The optical lens has good temperature performance, and the imaging effect changes little at high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above embodiments of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0198] Those skilled in the art should understand that the total optical length TTL of the optical lens used in the above is the axial distance from the first side surface of the first lens to the imaging surface or image source surface; the optical back focal length BFL of the optical lens is the axial distance from the second side surface of the ninth lens to the imaging surface or image source surface; and the maximum field of view angle FOV of the optical lens is related to the image height H, which refers to the corresponding field of view angle using the image height H.

[0199] In addition, the application focuses on protecting the lens architecture, and the lens surface type is not limited to spherical or aspherical; if the focus is on the resolution quality, the lenses can all use aspherical lenses. The lens material is also not limited to plastic and glass; if the focus is on the temperature performance, the lenses can all use glass lenses.

[0200] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the application to obtain the various results and advantages described in the specification. For example, although nine lenses are described as an example in the embodiments, the optical lens is not limited to including nine lenses. If necessary, the optical lens can also include other numbers of lenses.

[0201] The 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 of the basic parameters of the optical lens, the curvature radius and the thickness / distance, are mm.

[0202] Embodiment 1

[0203] The following refers to Figure 1 The optical lens according to Embodiment 1 of the application is described.

[0204] As shown in Figure 1 , the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The second lens L2 and the third lens L3 are cemented to form a cemented lens, the fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens.

[0205] The first lens L1 has a negative focal power, and its first side S1 is a convex surface and its second side S2 is a concave surface.

[0206] The second lens L2 has a positive focal power, and its first side S3 is a concave surface and its second side is a convex surface.

[0207] The third lens L3 has a negative focal power, and its first side S4 is a concave surface and its second side S5 is a convex surface.

[0208] The fourth lens L4 has a positive focal power, and its first side S6 is a convex surface and its second side S7 is a convex surface.

[0209] The fifth lens L5 has a positive focal power, and its first side S9 is a convex surface and its second side is a convex surface.

[0210] The sixth lens L6 has negative focal power, its first side S10 is concave, and its second side S11 is concave.

[0211] The seventh lens L7 has positive focal power, its first side S12 is convex, and its second side is convex.

[0212] The eighth lens L8 has negative focal power, its first side S13 is concave, and its second side S14 is convex.

[0213] The ninth lens L9 has negative focal power, its first side S15 is concave, and its second side S16 is concave.

[0214] The second side S16 of the ninth lens L9 in the optical lens has at least one inflection point.

[0215] The second side of the optical lens is provided with an image plane IMA, and the ninth lens L9 and the image plane IMA are provided with an optical filter IR, the optical filter IR has a first side S17 and a second side S18. The optical filter IR and the image plane IMA are provided with a protective glass CG, the protective glass CG has a first side S19 and a second side S20. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0216] Table 1 shows the basic parameter table of the optical lens of embodiment 1. It should be understood that the second side of the second lens L2 and the first side S4 of the third lens L3 have exactly the same surface parameters; the second side of the fifth lens L5 and the first side S10 of the sixth lens L6 have exactly the same surface parameters; the second side of the seventh lens L7 and the first side S13 of the eighth lens L8 have exactly the same surface parameters.

[0217] Table 1

[0218]

[0219] In embodiment 1, the first side S15 and the second side S16 of the ninth lens L9 are both aspherical surfaces, and the surface type of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0220] ;

[0221] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical surfaces S15 and S16 in Example 1.

[0222] Table 2

[0223]

[0224] 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 0.78. Therefore, the optical lens given in Example 1 has good imaging quality and can achieve a high resolution of eight megapixels.

[0225] Example 2

[0226] 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.

[0227] Table 3 shows the basic parameters of the optical lens in Example 2.

[0228] Table 3

[0229]

[0230] In Example 2, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 4 shows the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 2.

[0231] Table 4

[0232]

[0233] 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 0.78. Therefore, the optical lens given in Example 2 has good imaging quality and can achieve a high resolution of eight megapixels.

[0234] Example 3

[0235] The following description refers to Figure 5 An optical lens according to Embodiment 3 of the present application is described. As shown in FIG. 3, the optical lens comprises, in order from a first side to a second side along an optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9. A stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The second lens L2 and the third lens L3 are separated from each other, the fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens, and the seventh lens L7 and the eighth lens L8 are cemented to form a cemented lens. Figure 5

[0236] The first lens L1 has a negative focal power, the first side S1 is convex, and the second side S2 is concave.

[0237] The second lens L2 has a positive focal power, the first side S3 is concave, and the second side S4 is convex.

[0238] The third lens L3 has a negative focal power, the first side S5 is concave, and the second side S6 is convex.

[0239] The fourth lens L4 has a positive focal power, the first side S7 is convex, and the second side S8 is convex.

[0240] The fifth lens L5 has a positive focal power, the first side S10 is convex, and the second side is convex.

[0241] The sixth lens L6 has a negative focal power, the first side S11 is concave, and the second side S12 is convex.

[0242] The seventh lens L7 has a negative focal power, the first side S13 is convex, and the second side is concave.

[0243] The eighth lens L8 has a positive focal power, the first side S14 is convex, and the second side S15 is convex.

[0244] The ninth lens L9 has a negative focal power, the first side S16 is concave, and the second side S17 is concave.

[0245] The second side S17 of the ninth lens L9 in the optical lens has at least one inflection point.

[0246] ​The second side of the optical lens is provided with an image plane IMA, and a filter IR is arranged between the ninth lens L9 and the image plane IMA, the filter IR has a first side S18 and a second side S19. A protection glass CG is arranged between the filter IR and the image plane IMA, the protection glass CG has a first side S20 and a second side S21. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0247] Table 5 shows the basic parameter table of the optical lens of Example 3. It should be understood that the second side of the second lens L2 and the first side S4 of the third lens L3 can have different surface parameters; the second side of the fifth lens L5 and the first side S10 of the sixth lens L6 have exactly the same surface parameters; the second side of the seventh lens L7 and the first side S13 of the eighth lens L8 have exactly the same surface parameters.

[0248] Table 5

[0249]

[0250] In Example 3, the first side S16 and the second side S17 of the ninth lens L9 are both aspherical surfaces. Table 6 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface S16 and S17 that can be used in Example 3.

[0251] Table 6

[0252]

[0253] From Figure 6 the center field of view of the optical lens of Example 3 can reach a peak value of 0.72 at a spatial frequency of 119 lp / mm (119 lines per millimeter). Therefore, the optical lens given in Example 3 has good imaging quality and can achieve a high resolution of eight million pixels.

[0254] Example 4

[0255] The optical lens according to Example 4 of the present application is described below with reference to Figure 7 As shown in Figure 7 , the main difference between this embodiment and Example 3 is that the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different.

[0256] Table 7 shows the basic parameter table of the optical lens of Example 4.

[0257] Table 7

[0258]

[0259] In Example 4, the first side surface S16 and the second side surface S17 of the ninth lens L9 are both aspherical surfaces. Table 8 shows the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S16 and S17 in Example 4.

[0260] Table 8

[0261]

[0262] 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 0.76. Therefore, the optical lens given in Example 4 has good imaging quality and can achieve a high resolution of eight megapixels.

[0263] Example 5

[0264] 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 fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface is concave; the sixth lens L6 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex.

[0265] Table 9 shows the basic parameters of the optical lens of Example 5.

[0266] Table 9

[0267]

[0268] In Example 5, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 10 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 5.

[0269] Table 10

[0270]

[0271] 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 0.83. Therefore, the optical lens given in Example 5 has good imaging quality and can achieve a high resolution of eight megapixels.

[0272] Embodiment 6

[0273] The optical lens according to Embodiment 6 of the present application is described below with reference to Figure 11 As shown in FIG. 6, the main differences between this embodiment and Embodiment 1 are as follows: the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different; and the fifth lens L5 has negative focal power, the first side S9 is a concave surface, and the second side is a concave surface; the sixth lens L6 has positive focal power, the first side S10 is a convex surface, and the second side S11 is a convex surface. Figure 11

[0274] Table 11 shows the basic parameter table of the optical lens of Embodiment 6.

[0275] Table 11

[0276]

[0277] In Embodiment 6, the first side S15 and the second side S16 of the ninth lens L9 are both aspherical surfaces. Table 12 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces S15 and S16 that can be used in Embodiment 6.

[0278] Table 12

[0279]

[0280] From Figure 12 the perspective of the MTF peak value of the central field of view of the optical lens of Embodiment 6 at a spatial frequency of 119 lp / mm (119 line pairs per millimeter), it can reach 0.84. Therefore, the optical lens given in Embodiment 6 has good imaging quality and can achieve a high resolution of eight million pixels.

[0281] Embodiment 7

[0282] The optical lens according to Embodiment 7 of the present application is described below with reference to Figure 13 As shown in FIG. 7, the main differences between this embodiment and Embodiment 1 are as follows: the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different; and the seventh lens L7 has negative focal power, the second side is a concave surface; the eighth lens L8 has positive focal power, the first side S13 is a convex surface. Figure 13 Table 13 shows the basic parameter table of the optical lens of Embodiment 7.

[0283] Table 13

[0284]

[0285] ​​

[0286] In Example 7, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 14 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 7.

[0287] Table 14

[0288]

[0289] from Figure 14 As can be seen, the MTF peak value of the optical lens in Example 7 at the center field of view of 119 lp / mm (119 line pairs / mm) can reach 0.78. Therefore, the optical lens given in Example 7 has good imaging quality and can achieve a high resolution of eight megapixels.

[0290] Example 8

[0291] The following is for reference Figure 15 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 15 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 seventh lens L7 has negative optical power and its second side surface is concave; the eighth lens L8 has positive optical power and its first side surface S13 is convex.

[0292] Table 15 shows the basic parameters of the optical lens of Example 8.

[0293] Table 15

[0294]

[0295] In Example 8, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 16 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 8.

[0296] Table 16

[0297]

[0298] 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 0.78. Therefore, the optical lens given in Example 8 has good imaging quality and can achieve a high resolution of eight megapixels.

[0299] Example 9

[0300] 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 second side surface of the fourth lens L4 is concave; the second side surface of the sixth lens L6 is convex; the second side surface S14 of the eighth lens L8 is concave; the ninth lens L9 has positive optical power and its first side surface S15 is convex; the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0301] Table 17 shows the basic parameters of the optical lens of Example 9.

[0302] Table 17

[0303]

[0304] In Example 9, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 18 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 9.

[0305] Table 18

[0306]

[0307] 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 0.72. Therefore, the optical lens given in Example 9 has good imaging quality and can achieve a high resolution of eight megapixels.

[0308] Example 10

[0309] The following is for reference Figure 19 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 19 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 second side surface of the fourth lens L4 is concave; the second side surface of the sixth lens L6 is convex; the second side surface S14 of the eighth lens L8 is concave; the ninth lens L9 has positive optical power and its first side surface S15 is convex; the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0310] Table 19 shows the basic parameters of the optical lens of Example 10.

[0311] Table 19

[0312]

[0313] In Embodiment 10, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 20 shows the conic constant k and the higher order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 that can be used in Embodiment 10.

[0314] Table 20

[0315]

[0316] From Figure 20 it can be seen that the MTF peak value of the central field of view of the optical lens of Embodiment 10 at a spatial frequency of 119 lp / mm (119 line pairs per millimeter) can reach 0.73. Therefore, the optical lens given in Embodiment 10 has good imaging quality and can achieve a high resolution of eight million pixels.

[0317] Embodiment 11

[0318] The optical lens according to Embodiment 11 of the present application is described below with reference to Figure 21 As shown in Figure 21 , the main differences between this embodiment and Embodiment 1 are that the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different; the ninth lens L9 has positive refractive power, the first side surface S15 is convex, and the second side surface S16 is convex; the first side surface S15 of the ninth lens L9 has at least one inflection point; and the second side surface S16 has no inflection point.

[0319] Table 21 shows the basic parameter table of the optical lens of Embodiment 11.

[0320] Table 21

[0321]

[0322] In Embodiment 11, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 22 shows the conic constant k and the higher order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 that can be used in Embodiment 11.

[0323] Table 22

[0324]

[0325] From Figure 22As 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 0.72. Therefore, the optical lens given in Example 11 has good imaging quality and can achieve a high resolution of eight megapixels.

[0326] Example 12

[0327] The following is for reference Figure 23 Describes an optical lens according to Embodiment 12 of this application. For example... Figure 23 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the ninth lens L9 has positive optical power, its first side surface S15 is convex, and its second side surface S16 is convex; the first side surface S15 of the ninth lens L9 has at least one inflection point; and the second side surface S16 does not have an inflection point.

[0328] Table 23 shows the basic parameters of the optical lens of Example 12.

[0329] Table 23

[0330]

[0331] In Example 12, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 24 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 12.

[0332] Table 24

[0333]

[0334] 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 0.72. Therefore, the optical lens given in Example 12 has good imaging quality and can achieve a high resolution of eight megapixels.

[0335] Example 13

[0336] 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 first side surface S15 of the ninth lens L9 is convex; and the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0337] Table 25 shows a basic parameter table of the optical lens of Example 13.

[0338] Table 25

[0339]

[0340] In Example 13, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 26 gives the conic coefficient k and the high order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 used in Example 13.

[0341] Table 26

[0342]

[0343] From Figure 26 the MTF peak value of the central field of view of the optical lens of Example 13 at a spatial frequency of 119 lp / mm (119 line pairs per millimeter) can reach 0.78. Therefore, the optical lens given in Example 13 has good imaging quality and can achieve a high resolution of eight million pixels.

[0344] Example 14

[0345] The optical lens according to Example 14 of the present application is described below with reference to Figure 27 As shown in Figure 27 , the main differences between this embodiment and Example 1 are that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different; the first side surface S15 of the ninth lens L9 is convex; and the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0346] Table 27 shows a basic parameter table of the optical lens of Example 14.

[0347] Table 27

[0348]

[0349] In Example 14, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 28 gives the conic coefficient k and the high order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 used in Example 14.

[0350] Table 28

[0351]

[0352] From Figure 28As 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 0.78. Therefore, the optical lens given in Example 14 has good imaging quality and can achieve a high resolution of eight megapixels.

[0353] Example 15

[0354] 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 second side surface S16 of the ninth lens L9 is convex; and the second side surface S16 of the ninth lens L9 does not have a curvature point.

[0355] Table 29 shows the basic parameters of the optical lens of Example 15.

[0356] Table 29

[0357]

[0358] In Example 15, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 30 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 15.

[0359] Table 30

[0360]

[0361] 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 0.76. Therefore, the optical lens given in Example 15 has good imaging quality and can achieve a high resolution of eight megapixels.

[0362] Example 16

[0363] The following is for reference Figure 31 Describes an optical lens according to Embodiment 16 of this application. For example... Figure 31 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 second side surface S16 of the ninth lens L9 is convex; and the second side surface S16 of the ninth lens L9 does not have a curvature point.

[0364] Table 31 shows the basic parameters of the optical lens of Example 16.

[0365] Table 31

[0366]

[0367] In Example 16, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 32 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 16.

[0368] Table 32

[0369]

[0370] from Figure 32 As can be seen, the MTF peak value of the optical lens in Example 16 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.77. Therefore, the optical lens given in Example 16 has good imaging quality and can achieve a high resolution of eight megapixels.

[0371] Example 17

[0372] The following is for reference Figure 33 Describes an optical lens according to Embodiment 17 of this application. For example... Figure 33 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second side surface S7 of the fourth lens L4 is concave.

[0373] Table 33 shows the basic parameters of the optical lens of Example 17.

[0374] Table 33

[0375]

[0376] In Example 17, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 34 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 17.

[0377] Table 34

[0378]

[0379] from Figure 34As can be seen, the MTF peak value of the optical lens in Example 17 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.8. Therefore, the optical lens given in Example 17 has good imaging quality and can achieve a high resolution of eight megapixels.

[0380] Example 18

[0381] The following is for reference Figure 35 Describes an optical lens according to Embodiment 18 of this application. For example... Figure 35 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the second side surface S7 of the fourth lens L4 is concave.

[0382] Table 35 shows the basic parameters of the optical lens of Example 18.

[0383] Table 35

[0384]

[0385] In Example 18, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 36 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 18.

[0386] Table 36

[0387]

[0388] from Figure 36 As can be seen, the MTF peak value of the optical lens in Example 18 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.8. Therefore, the optical lens given in Example 18 has good imaging quality and can achieve a high resolution of eight megapixels.

[0389] Example 19

[0390] The following is for reference Figure 37 Describes an optical lens according to Embodiment 19 of this application. For example... Figure 37 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 second side surface of the fifth lens L5 is concave; the first side surface S10 of the sixth lens L6 is convex; the ninth lens L9 has positive optical power and its first side surface S15 is convex; the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0391] Table 37 shows a basic parameter table of the optical lens of Example 19.

[0392] Table 37

[0393]

[0394] In Example 19, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 38 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 that can be used in Example 19.

[0395] Table 38

[0396]

[0397] From Figure 38 the MTF peak value of the central field of view of the optical lens of Example 19 can reach 0.73 at a spatial frequency of 119 lp / mm (119 line pairs per millimeter). Therefore, the optical lens given in Example 19 has good imaging quality and can achieve a high resolution of eight million pixels.

[0398] Example 20

[0399] The optical lens according to Example 20 of the present application is described below with reference to Figure 39 As shown in Figure 39 , the main differences between this embodiment and Example 1 are that the optical parameters such as the radii of curvature of the lens surfaces and the lens thicknesses are different; the second side surface of the fifth lens L5 is a concave surface; the first side surface S10 of the sixth lens L6 is a convex surface; the ninth lens L9 has positive focal power, and its first side surface S15 is a convex surface; and the first side surface S15 of the ninth lens L9 has at least one inflection point.

[0400] Table 39 shows a basic parameter table of the optical lens of Example 20.

[0401] Table 39

[0402]

[0403] In Example 20, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 40 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 that can be used in Example 20.

[0404] Table 40

[0405]

[0406] From Figure 40 The MTF peak value of the central field of view of the optical lens of embodiment 20 can reach 0.72 at a spatial frequency of 119 lp / mm (119 lines per millimeter). Therefore, the optical lens given by embodiment 20 has better imaging quality and can achieve a high resolution of eight million pixels.

[0407] Embodiment 21

[0408] The optical lens according to embodiment 21 of the present application is described below with reference to Figure 41 As shown in Figure 41 Compared with embodiment 1, the main difference of the present embodiment is that the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different.

[0409] Table 41 shows the basic parameter table of the optical lens of embodiment 21.

[0410] Table 41

[0411]

[0412] In embodiment 21, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 42 gives the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S15 and S16 that can be used in embodiment 21.

[0413] Table 42

[0414]

[0415] From Figure 42 The MTF peak value of the central field of view of the optical lens of embodiment 21 can reach 0.71 at a spatial frequency of 119 lp / mm (119 lines per millimeter). Therefore, the optical lens given by embodiment 21 has better imaging quality and can achieve a high resolution of eight million pixels.

[0416] Embodiment 22

[0417] The optical lens according to embodiment 22 of the present application is described below with reference to Figure 43 As shown in Figure 43As 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 fifth lens L5 has negative optical power and its second side is concave; the sixth lens L6 has positive optical power, its first side S10 is convex and its second side S11 is convex; the seventh lens L7 has negative optical power and its first side S12 is concave; the eighth lens L8 has positive optical power; the ninth lens L9 has positive optical power and its first side S15 is convex; the first side S15 of the ninth lens L9 has at least one inflection point.

[0418] Table 43 shows the basic parameters of the optical lens of Example 22.

[0419] Table 43

[0420]

[0421] In Example 22, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 44 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 22.

[0422] Table 44

[0423]

[0424] from Figure 44 As can be seen, the MTF peak value of the optical lens in Example 22 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 22 has good imaging quality and can achieve a high resolution of eight megapixels.

[0425] Example 23

[0426] The following is for reference Figure 45 Describes an optical lens according to Embodiment 23 of this application. For example... Figure 45 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 fifth lens L5 has negative optical power and its second side is concave; the sixth lens L6 has positive optical power, its first side S10 is convex and its second side S11 is convex; the seventh lens L7 has negative optical power and its first side S12 is concave; the eighth lens L8 has positive optical power; the ninth lens L9 has positive optical power and its first side S15 is convex; the first side S15 of the ninth lens L9 has at least one inflection point.

[0427] Table 45 shows the basic parameters of the optical lens of Example 23.

[0428] Table 45

[0429]

[0430] In Example 23, the first side surface S15 and the second side surface S16 of the ninth lens L9 are both aspherical surfaces. Table 46 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S15 and S16 in Example 23.

[0431] Table 46

[0432]

[0433] from Figure 46 As can be seen, the MTF peak value of the optical lens in Example 23 at the center field of view at a spatial frequency of 119 lp / mm (119 line pairs / mm) can reach 0.77. Therefore, the optical lens given in Example 23 has good imaging quality and can achieve a high resolution of eight megapixels.

[0434] Tables 47-1 to 47-3 provide the basic parameters of the optical lenses used in Examples 1 to 23, such as TTL, F, FNO, H, FOV, F1, F2, F3, F4, F5, F6, F7, F8, F9, D, d45, d89, R41, R21, R32, d34, D92, BFL, F23, F56, F78, R11, R12, θ, d2, d3, d5, d6, d7, d8, and d67. 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.

[0435] Table 47-1

[0436]

[0437] Table 47-2

[0438]

[0439] Table 47-3

[0440]

[0441] In summary, the relationships in each of the embodiments in Examples 1 to 23 satisfy the relationships shown in Tables 48-1 to 48-3.

[0442] Table 48-1

[0443]

[0444] Table 48-2

[0445]

[0446] Table 48-3

[0447]

[0448] The present application also provides an electronic device comprising the optical lens in the above example embodiments and at least one of an imaging element and a light source; wherein the imaging element is configured to convert an optical image or optical information formed by the optical lens into an electrical signal; and wherein the light source is located at the second side of the optical lens, and light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0449] It is worth noting that the electronic device can be implemented as a lidar, a camera or a projection lamp, but is not limited thereto. Accordingly, the optical lens can be used as a light emitting lens or a light receiving lens. For example, when the electronic device is a camera, the electronic device can comprise the optical lens in the above example embodiments and a photosensor configured to convert an optical image formed by the optical lens into an electrical signal, the photosensor being disposed at the second side of the optical lens, for example, on an imaging surface, and can be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0450] When the electronic device is a projection lamp, the electronic device can comprise the optical lens in the above example embodiments and a light source, the light source being located at the second side of the optical lens. Light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side.

[0451] In addition, when the electronic device is a lidar, the receiving end lens of the lidar can be implemented as the optical lens described above, the first side of the optical lens being an object side, and the second side of the optical lens being an image side.

[0452] It is worth noting that the electronic device implemented as a laser radar can include the first device and the second device, the first device can be implemented as a laser radar transmitting device, and the second device can be implemented as a laser radar receiving device. The first device can include the optical lens and the light source in the above exemplary embodiments, the light source is located at the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens and forms an image or illuminates an area on the first side. The second device can include the optical lens and the photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal in the above exemplary embodiments, the photoelectric sensor is arranged at the second side of the optical lens (for example, arranged on the imaging surface), and the photoelectric sensor can be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS), and the light from the first side is imaged on the second side after passing through the optical lens.

[0453] It is worth mentioning that the application also provides a vehicle, which can include the above electronic device for obtaining information.

[0454] The above description is only the preferred embodiments of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and also covers other technical solutions formed by any combinations of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. An optical lens characterized in that, In order from the first side to the second side along the optical axis, comprises: a first lens with negative refractive power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens with positive refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens with negative refractive power, a first side of the third lens being concave, a second side of the third lens being convex; a fourth lens with positive refractive power; a fifth lens with refractive power; a sixth lens with refractive power, a sign of the refractive power of the sixth lens being opposite to that of the fifth lens; a seventh lens with refractive power; an eighth lens with refractive power, a sign of the refractive power of the eighth lens being opposite to that of the seventh lens; and a ninth lens with refractive power; wherein the number of lenses with refractive power in the optical lens is nine; the optical lens satisfies: 0.15≤d45 / F≤0.75; wherein d45 is an on-axis distance from the second side of the fourth lens to the first side of the fifth lens, and F is a total effective focal length of the optical lens.

2. The optical lens of claim 1, wherein, a first side of the fourth lens is convex, and a second side of the fourth lens is convex or concave.

3. The optical lens according to claim 1, wherein the fifth lens has positive refractive power, a first side of the fifth lens is convex, and a second side of the fifth lens is convex or concave; or the fifth lens has negative refractive power, a first side of the fifth lens is concave or convex, and a second side of the fifth lens is concave.

4. The optical lens according to claim 1, wherein the sixth lens has negative refractive power, a first side of the sixth lens is concave, and a second side of the sixth lens is concave or convex; or the sixth lens has negative refractive power, a first side of the sixth lens is convex, and a second side of the sixth lens is concave; or the sixth lens has positive refractive power, a first side of the sixth lens is convex, and a second side of the sixth lens is convex.

5. The optical lens according to claim 1, wherein the seventh lens has positive refractive power, a first side of the seventh lens is convex, and a second side of the seventh lens is convex; or the seventh lens has negative refractive power, a first side of the seventh lens is convex, and a second side of the seventh lens is concave; or the seventh lens has negative refractive power, a first side of the seventh lens is concave, and a second side of the seventh lens is convex.

6. The optical lens according to claim 1, wherein the eighth lens has negative refractive power, a first side of the eighth lens is concave, and a second side of the eighth lens is concave or convex; or the eighth lens has positive refractive power, a first side of the eighth lens is convex or concave, and a second side of the eighth lens is convex.

7. The optical lens of claim 1, wherein, the ninth lens has negative refractive power or positive refractive power.

8. The optical lens of claim 1, wherein, The first side of the ninth lens is convex or concave, and the second side of the ninth lens is convex or concave.

9. The optical lens of claim 1, wherein, The second lens and the third lens are bonded to each other or separated from each other.

10. The optical lens of claim 1, wherein, The fifth lens and the sixth lens are bonded to each other.

11. The optical lens of claim 1, wherein, The seventh lens and the eighth lens are bonded to each other.

12. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.025≤d45 / TTL≤0.12; wherein, d45 is an on-axis distance from the second side of the fourth lens to the first side of the fifth lens, and TTL is an overall optical length of the optical lens.

13. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.015≤d89 / TTL≤0.07; wherein, d89 is an on-axis distance from the second side of the eighth lens to the first side of the ninth lens, and TTL is an overall optical length of the optical lens.

14. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.3≤R21 / R32<1; wherein, R21 is a curvature radius of the first side of the second lens, and R32 is a curvature radius of the second side of the third lens.

15. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 4≤TTL / F≤7.5; wherein, TTL is an overall optical length of the optical lens, and F is a total effective focal length of the optical lens.

16. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies -4≤F1 / F≤-0.5; wherein, F1 is an effective focal length of the first lens, and F is a total effective focal length of the optical lens.

17. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 2.5≤D / H / FOV×180°≤4.5; wherein, D is an entrance pupil diameter corresponding to a maximum field of view of the optical lens on the first side of the first lens, H is an image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

18. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.0005≤d34 / TTL≤0.006; wherein, d34 is an on-axis distance from the second side of the third lens to the first side of the fourth lens, and TTL is an overall optical length of the optical lens.

19. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.5≤D92 / H≤1.5; wherein, D92 is an entrance pupil diameter corresponding to a maximum field of view of the optical lens on the second side of the ninth lens, and H is an image height corresponding to the maximum field of view of the optical lens.

20. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.6≤F / H≤0.85; wherein, F is a total effective focal length of the optical lens, and H is an image height corresponding to a maximum field of view of the optical lens.

21. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 0.05≤BFL / TTL≤0.15; wherein, BFL is an optical back focal length of the optical lens, and TTL is an overall optical length of the optical lens.

22. The optical lens of any of claims 1 to 11, wherein, A combined focal length of the second lens and the third lens is negative.

23. The optical lens of any of claims 1 to 11, wherein, A combined focal length of the seventh lens and the eighth lens is positive.

24. The optical lens of any of claims 1 to 11, wherein, The fifth lens and the sixth lens are bonded to each other, the seventh lens and the eighth lens are bonded to each other, and a sum of optical powers of the bonded member formed by the fifth lens and the sixth lens and the bonded member formed by the seventh lens and the eighth lens is positive.

25. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies 1≤R11 / R12≤8; R11 is a radius of curvature of a first side of the first lens, and R12 is a radius of curvature of a second side of the first lens.

26. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies: |(H-F*theta) / (F*theta)|<=0.1; H is an image height corresponding to a maximum field angle of the optical lens, theta 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.

27. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following relationships: 8<=TTL / H / FOV*180%<=12, 0.2<=F2 / F<=15, -18<=F3 / F<= -0.2, 0.2<=F4 / F<=25, 0.5<=|F5 / F|<=3.5, 0.3<=|F6 / F|<=3, 0.3<=|F7 / F|<=4.5, 0.3<=|F8 / F|<=9, -2<=F2 / F3<= -0.3, -3.5<=F5 / F6<= -0.2, -4<=F7 / F8<= -0.01, 0.3<=R41 / F<=20, 50%<= (FOV*F) / H<=70%<=1, 0.1<=(d2+d3) / TTL<=0.25, 0.03<=(d5+d6) / TTL<=0.25, 0.03<=(d7+d8) / TTL<=0.25, 0.001<=d67 / TTL<=0.07, d45>d34, and R21>R32; TTL is an optical total length of the optical lens, H is an image height corresponding to a maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F2 is an effective focal length of the second lens, F is a total effective focal length of the optical lens, F3 is an effective focal length of the third lens, F4 is an effective focal length of the fourth lens, F5 is an effective focal length of the fifth lens, F6 is an effective focal length of the sixth lens, F7 is an effective focal length of the seventh lens, F8 is an effective focal length of the eighth lens, F9 is an effective focal length of the ninth lens, R41 is a radius of curvature of a first side of the fourth lens, F56 is a combined focal length of the fifth lens and the sixth lens, d2 is a central thickness of the second lens on the optical axis, d3 is a central thickness of the third lens on the optical axis, d5 is a central thickness of the fifth lens on the optical axis, d6 is a central thickness of the sixth lens on the optical axis, d7 is a central thickness of the seventh lens on the optical axis, d8 is a central thickness of the eighth lens on the optical axis, d67 is an on-axis distance from a second side of the sixth lens to a first side of the seventh lens, d45 is an on-axis distance from a second side of the fourth lens to a first side of the fifth lens, d34 is an on-axis distance from a second side of the third lens to a first side of the fourth lens, R21 is a radius of curvature of a first side of the second lens, and R32 is a radius of curvature of a second side of the third lens.

28. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following relationships: 5.5TTL / F6FOVx180°11, -3F1 / F1-1, 0.5F2 / F12, -15F3 / F0.5, 0.5F4 / F20, 0.7|F5 / F|3.2, 0.5|F6 / F|2.5, 0.5|F7 / F|4.2, 0.5|F8 / F|7, 0.5|F9 / F|162.158, -1.5F2 / F30.5, -2.8F5 / F60.4, -3.5F7 / F80.05, 0.03d45 / TTL0.11, 0.02d89 / TTL0.06, 3D / H / FOVx180°3.5, 0.5R41 / F15, 0.5R21 / R32 0.8, 0.001d34 / TTL0.005, 0.8D92 / H1.1, 55°(FOVxF) / H65°, 0.7F / H0.75, 0.075BFL / TTL0.11, -100F23 / F3, 1.5|F56 / F|100, 0.2F78 / F25, 0.25(1 / F56+1 / F78) / (1 / F)1.5, 1.5R11 / R12 6.5, 0.005|(H-Fx9) / (Fx9)|0.07, 0.13(d2+d3) / TTL0.22, 0.05(d5+d6) / TTL0.2, 0.06(d7+d8) / TTL0.2, 0.005d67 / TTL0.065, and 0.18d45 / F0.

66. Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length 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, 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, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F9 is the effective focal length of the ninth lens, D is the entrance pupil on the first side of the first lens corresponding to the maximum field angle of the optical lens, d45 is the axial distance from the second side of the fourth lens to the first side of the fifth lens, d89 is the axial distance from the second side of the eighth lens to the first side of the ninth lens, R41 is the curvature radius of the first side of the fourth lens, R21 is the curvature radius of the first side of the second lens, R32 is the curvature radius of the second side of the third lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, D92 is the entrance pupil on the second side of the ninth lens corresponding to the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens; F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth 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, θ is the radian value of the maximum field angle of the optical lens, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d6 is the central thickness of the sixth lens on the optical axis, d7 is the central thickness of the seventh lens on the optical axis, d8 is the central thickness of the eighth lens on the optical axis, d67 is the axial distance from the second side of the sixth lens to the first side of the seventh lens.

29. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following relationships: 0.5≤F4 / F≤5, 1≤|F9 / F|≤162.158, -80≤F23 / F≤-4, 2≤|F56 / F|≤100, 0.5≤F78 / F≤6 and 0.35≤(1 / F56+1 / F78) / (1 / F)≤0.9; Wherein, F4 is the effective focal length of the fourth lens, F is the total effective focal length of the optical lens, F9 is the effective focal length of the ninth lens, F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth lens.

30. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies at least one of the following relationships: 6.012TTL / F6.591, 9.586TTL / H / FOVx180°10.711, -2.529F1 / F-1.683, 1.761F2 / F8.298, -10.483F3 / F-1.907, 2.016F4 / F15.52, 1.028|F5 / F|2.57, 0.808|F6 / F|1.942, 0.845|F7 / F|3.065, 1.053|F8 / F|5.751, 2|F9 / F|162.158, -1.3F2 / F3-0.792, -2.183F5 / F6-0.694, -2.608F7 / F8-0.166, 0.04d45 / TTL0.089, 0.025d89 / TTL0.047, 3.243D / H / FOVx180°3.337, 1.524R41 / F11.645, 0.578R21 / R32 0.739, 0.002d34 / TTL0.004, 0.888D92 / H1.022, 58.224°(FOVxF) / H60.503°, 0.717F / H0.745, 0.082BFL / TTL0.098, -67.705F23 / F-5.472, 2.735|F56 / F|82.355, 1.264F78 / F15.614, 0.429(1 / F56+1 / F78) / (1 / F)0.767, 2.022R11 / R12 5.277, 0.016|(H-Fx9) / (Fx9)|0.053, 0.166(d2+d3) / TTL0.206, 0.088(d5+d6) / TTL0.176, 0.085(d7+d8) / TTL0.165, 0.011d67 / TTL0.048, and 0.255d45 / F0.

544. Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length 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, 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, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F9 is the effective focal length of the ninth lens, D is the entrance pupil on the first side of the first lens corresponding to the maximum field angle of the optical lens, d45 is the axial distance from the second side of the fourth lens to the first side of the fifth lens, d89 is the axial distance from the second side of the eighth lens to the first side of the ninth lens, R41 is the curvature radius of the first side of the fourth lens, R21 is the curvature radius of the first side of the second lens, R32 is the curvature radius of the second side of the third lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, D92 is the entrance pupil on the second side of the ninth lens corresponding to the maximum field angle of the optical lens, BFL is the optical back focal length of the optical lens; F23 is the combined focal length of the second lens and the third lens, F56 is the combined focal length of the fifth lens and the sixth lens, F78 is the combined focal length of the seventh lens and the eighth 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, θ is the radian value of the maximum field angle of the optical lens, d2 is the central thickness of the second lens on the optical axis, d3 is the central thickness of the third lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d6 is the central thickness of the sixth lens on the optical axis, d7 is the central thickness of the seventh lens on the optical axis, d8 is the central thickness of the eighth lens on the optical axis, d67 is the axial distance from the second side of the sixth lens to the first side of the seventh lens.

31. An electronic device, comprising: Comprising: The optical lens according to any one of claims 1-30; 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