Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. In order from a first side to a second side along an optical axis, the optical lens comprises: a first lens with negative optical power, a first side surface of the first lens being a convex surface, and a second side surface of the first lens being a concave surface; a second lens with optical power, a first side surface of the second lens being a concave surface, and a second side surface of the second lens being a convex surface; a third lens with positive optical power, a first side surface of the third lens being a convex surface; a fourth lens with optical power; and a fifth lens with optical power, the fifth lens being opposite to the fourth lens in sign of optical power; wherein the number of lenses with optical power in the optical lens is five; the optical lens satisfies: 3≤TTL / F≤4.8, 10≤|F2 / F| and 1≤F3 / F≤1.8.

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] With the rapid development of automatic driving, vehicle-mounted lenses, as key components in the automatic driving auxiliary system, have also developed rapidly. Among them, side-view cameras, as an important emerging direction of vehicle-mounted lenses, are usually installed at the B-pillar or vehicle rearview mirror and are mainly applied to electronic rearview mirrors, side vehicle detection, vehicle lane changing, etc.

[0003] In recent years, with the update and iteration of vehicle-mounted lenses, compared with ordinary optical lenses, vehicle-mounted lenses have more stringent standards and requirements while pursuing safe driving: for example, miniaturization to meet the needs of concealment, aesthetics and easy assembly, long back focal length to ensure mechanism adaptability and weaken light halo ghost image, low cost to take into account low-end vehicles, and high stability in actual environments such as high and low temperatures, etc.

[0004] However, side-view lenses are usually long-focus lenses, and with the improvement of chip resolution, it is difficult to ensure a large image surface while having a small front aperture and total lens length. In addition, since vehicle-mounted lenses require very small size and high image quality, it is difficult to ensure the long back focal length characteristic of the lens under the premise of ensuring lens processability. SUMMARY

[0005] The first aspect of the present application provides an optical lens, which comprises, in order from a first side to a second side along an optical axis: a first lens having a negative optical power, a first side of the first lens being a convex surface and a second side of the first lens being a concave surface; a second lens having an optical power, a first side of the second lens being a concave surface and a second side of the second lens being a convex surface; a third lens having a positive optical power, a first side of the third lens being a convex surface; a fourth lens having an optical power; and a fifth lens having an optical power, a sign of the optical power of the fifth lens being opposite to that of the fourth lens; wherein the number of lenses having an optical power in the optical lens is five; the optical lens satisfies: 3≤TTL / F≤4.8, 10≤|F2 / F| and 1≤F3 / F≤1.8; wherein TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens.

[0006] In this way, the optical lens has five lenses with optical power. The first side light first enters the first side of the first lens and then exits the second side of the first lens. The first lens has negative optical power, the first side is a convex surface, and the second side is a concave surface. The first lens can collect and diverge the light with a large field of view, so that the light exiting the second side 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 for the light with a large angle, and high resolution is achieved. The divergent light exiting the first lens enters the second lens. The first side of the second lens is a concave surface, and the second side is a convex surface. The second lens can smoothly guide the light into the rear optical system, and has good sensitivity and stability. Meanwhile, by controlling the absolute ratio between the effective focal length of the second lens and the total effective focal length of the optical lens, i.e. 10≤|F2 / F|, the second lens has a small optical power, which can effectively smooth the transition of the light diverging from the front first lens, so that the optical lens has low sensitivity and dynamic performance, and the imaging quality is improved. The light exiting the second lens enters the third lens. The third lens has positive optical power, and the first side is a convex surface. The third lens can effectively converge the light with a divergent trend in the front, and smoothly guide the light, so that the divergent light smoothly enters the rear optical system, which is beneficial to the realization of small aperture and miniaturization. Meanwhile, by controlling the ratio between the effective focal length of the third lens and the total effective focal length of the optical lens, i.e. 1≤F3 / F≤1.8, the third lens has a large optical power, which can effectively receive and converge the light in the front of the lens, so that the optical lens has a small front aperture and temperature drift effect, and the stability of imaging is ensured. The light exiting the third lens enters the fourth lens and the fifth lens. The fourth lens and the fifth lens have opposite signs of optical power, so that the light can smoothly reach the imaging surface after passing through the fourth lens and the fifth lens, and high resolution is achieved. Meanwhile, by controlling the ratio between the total optical length of the optical lens and the total effective focal length, i.e. 3≤TTL / F≤4.8, the ratio between the total optical length and the total effective focal length is small under the condition that the focal length is unchanged, so that the total optical length of the optical lens is small, which is beneficial to the miniaturization of the optical lens.

[0007] According to an example embodiment of the present application, the second lens has positive optical power or negative optical power.

[0008] According to an example embodiment of the present application, the second side of the third lens is a convex surface or a plane.

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

[0010] According to an example embodiment of the present application, the fourth lens has positive refractive power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex.

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

[0012] According to an example embodiment of the present application, the fifth lens has negative refractive power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave.

[0013] According to an example embodiment of the present application, the fourth lens and the fifth lens are cemented with each other; and the combined focal length of the fourth lens and the fifth lens is positive.

[0014] According to an example embodiment of the present application, the optical lens satisfies: 0.41≤BFL / TL≤0.55; wherein, BFL is the optical back focus of the optical lens, and TL is the total lens length of the optical lens.

[0015] According to an example embodiment of the present application, the optical lens satisfies: 0.1≤D1 / TTL≤0.35; wherein, D1 is the clear aperture on the first side surface of the first lens corresponding to the maximum field angle of the optical lens, and TTL is the total optical length of the optical lens.

[0016] According to an example embodiment of the present application, the optical lens satisfies: 2.5≤F45 / F≤17.5; wherein, F45 is the combined focal length of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens.

[0017] According to an example embodiment of the present application, the optical lens satisfies: 1≤R1 / F≤4.75; wherein, R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens.

[0018] According to an example embodiment of the present application, the optical lens satisfies: 0.48≤(d4+d5) / F≤0.7; wherein, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, and F is the total effective focal length of the optical lens.

[0019] According to an example embodiment of the present application, the optical lens satisfies: 0.8≤(R3+d2) / R4≤1.5; wherein, R3 is the radius of curvature of the first side surface of the second lens, d2 is the central thickness of the second lens on the optical axis, and R4 is the radius of curvature of the second side surface of the second lens.

[0020] According to an example embodiment of the present application, the optical lens satisfies: 0.1≤D1 / H / F×1mm≤0.3; wherein D1 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and F is the total effective focal length of the optical lens.

[0021] According to an example embodiment of the present application, the optical lens satisfies: 0.25≤BFL / TTL≤0.375; wherein BFL is the optical back focal length of the optical lens, and TTL is the optical total track length of the optical lens.

[0022] According to an example embodiment of the present application, the optical lens satisfies: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.02; wherein H is the image height corresponding to the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field angle of the optical lens.

[0023] According to an example embodiment of the present application, the optical lens satisfies: -2.2≤F1 / F3≤-0.9; wherein F1 is the effective focal length of the first lens, and F3 is the effective focal length of the third lens.

[0024] According to an example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 50°≤(FOV×F) / H≤70°, 0

[0025] wherein FOV is a maximum field angle of the optical lens, F is a total effective focal length of the optical lens, H is an image height corresponding to the maximum field angle of the optical lens, TTL is an optical total track length of the optical lens, D1 is an entrance pupil diameter of the optical lens, F1 is an effective focal length of the first lens, R5 is a radius of curvature of the first side of the third lens, d23 is an on-axis distance from the second side of the second lens to the first side of the third lens, d3 is a central thickness of the third lens on the optical axis, d1 is a central thickness of the first lens on the optical axis, TL is a total lens group length of the optical lens, F3 is an effective focal length of the third lens, F2 is an effective focal length of the second lens, R1 is a radius of curvature of the first side of the first lens, R2 is a radius of curvature of the second side of the first lens, d12 is an on-axis distance from the second side of the first lens to the first side of the second lens, F4 is an effective focal length of the fourth lens, F5 is an effective focal length of the fifth lens, Dmax is a maximum entrance pupil diameter of the first and second lenses corresponding to the maximum field angle of the optical lens, and Dmin is a minimum entrance pupil diameter of the first and second lenses corresponding to the maximum field angle of the optical lens.

[0026] According to an example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 55°≤(FOVxF) / H≤65°, 3.5≤TTL / F≤4.65, 0.04≤TTL / H / FOVxl°≤0.075, 0.0125≤D1 / H / FOVxl°≤0.025, 0.15≤D1 / H / Fxlmm≤0.25, 0.275≤BFL / TTL≤0.35, 0.42≤BFL / TL≤0.52, 0.8≤F / H≤1.2, 1.8≤F / ENPD≤2, 0.2≤F / ENPD / D1xlmm≤0.28, 0.8≤(H / 2) / (Fxtan(θ / 2))≤0.95, 12≤|F2 / F|, 1.25≤F3 / F≤1.7, 0.25≤D1 / TTL≤0.335, 0.9≤(R3+d2) / R4≤1.35, -2.8≤F1 / F≤-1.5, 2.85≤F45 / F≤12, 1.25≤R5 / F≤10, 0.24≤d23 / d3≤2, 0.52≤(d4+d5) / F≤0.65, 0.055≤d1 / TL≤0.095, 0<|F3 / F2|≤0.165, 1.2≤R1 / F≤4.25, -2≤F1 / F3≤-0.95, 1.8≤R1 / R2≤5.4, 0.35≤d23 / d12≤2.5, -1.2≤F4 / F5≤-0.95, and 1.25≤Dmax / Dmin≤1.65;

[0027] Wherein, FOV is the maximum field of view angle 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 of view angle of the optical lens, TTL is the total optical length of the optical lens, D1 is the clear aperture on the first side of the first lens corresponding to the maximum field of view angle of the optical lens, BFL is the optical back focal length of the optical lens, TL is the total lens group length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, θ is the radian value of the maximum field of view angle of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, R3 is the curvature radius of the first side of the second lens, d2 is the central thickness of the second lens on the optical axis, R4 is the curvature radius of the second side of the second lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, R5 is the curvature radius of the first side of the third lens, d23 is the axial distance from the second side of the second lens to the first side of the third lens, d3 is the central thickness of the third lens on the optical axis, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d1 is the central thickness of the first lens on the optical axis, R1 is the curvature radius of the first side of the first lens, R2 is the curvature radius of the second side of the first lens, d12 is the axial distance from the second side of the first lens to the first side of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, Dmax is the maximum clear aperture on the first side and the second side of the first lens and the second lens corresponding to the maximum field of view angle of the optical lens, and Dmin is the minimum clear aperture on the first side and the second side of the first lens and the second lens corresponding to the maximum field of view angle of the optical lens.

[0028] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 56.276°≤(FOVxF) / H≤63.306°, 3.94≤TTL / F≤4.522, 0.058≤TTL / H / FOVxl°≤0.071, 0.018≤D1 / H / FOVxl°≤0.021, 0.196≤D1 / H / Fxlmm≤0.224, 0.299≤BFL / TTL≤0.331, 0.427≤BFL / TL≤0.494, 0.879≤F / H≤1.055, 1.852≤F / ENPD≤1.855, 0.249≤F / ENPD / D1xlmm≤0.268, 0.821≤(H / 2) / (Fxtan(θ / 2))≤0.91, 12.359≤|F2 / F|≤11434.744, 1.422≤F3 / F≤1.654, 0.287≤D1 / TTL≤0.324, 1.031≤(R3+d2) / R4≤1.282, -2.684≤F1 / F≤-1.711, 3.13≤F45 / F≤8.098, 1.327≤R5 / F≤7.225, 0.255≤d23 / d3≤1.756, 0.569≤(d4+d5) / F≤0.638, 0.062≤d1 / TL≤0.086, 0<|F3 / F2|≤0.134, 1.329≤R1 / F≤3.832, -1.836≤F1 / F3≤-1.065, 2.008≤R1 / R2≤5.316, 0.366≤d23 / d12≤2.436, -1.195≤F4 / F5≤-1.005, and 1.367≤Dmax / Dmin≤1.501;

[0029] Wherein, FOV is the maximum field of view 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 of view of the optical lens, TTL is the total optical length of the optical lens, D1 is the clear aperture on the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, TL is the total lens group length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, R3 is the curvature radius of the first side of the second lens, d2 is the central thickness of the second lens on the optical axis, R4 is the curvature radius of the second side of the second lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth lens and the fifth lens, R5 is the curvature radius of the first side of the third lens, d23 is the axial distance from the second side of the second lens to the first side of the third lens, d3 is the central thickness of the third lens on the optical axis, d4 is the central thickness of the fourth lens on the optical axis, d5 is the central thickness of the fifth lens on the optical axis, d1 is the central thickness of the first lens on the optical axis, R1 is the curvature radius of the first side of the first lens, R2 is the curvature radius of the second side of the first lens, d12 is the axial distance from the second side of the first lens to the first side of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, Dmax is the maximum clear aperture on the first side and the second side of the first lens and the second lens corresponding to the maximum field of view of the optical lens, and Dmin is the minimum clear aperture on the first side and the second side of the first lens and the second lens corresponding to the maximum field of view of the optical lens.

[0030] The second aspect of the present application provides an electronic device including 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.

[0031] 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 refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having positive refractive power, a first side of the third lens being convex; a fourth lens having refractive power; and a fifth lens having refractive power, a sign of the refractive power of the fifth lens being opposite to that of the fourth lens; wherein a number of lenses having refractive power in the optical lens is five; the optical lens satisfies 0.8≤(R3+d2) / R4≤1.5, 1.5≤R1 / R2≤5.5 and 0.1≤D1 / TTL≤0.35; wherein R3 is a radius of curvature of the first side of the second lens, d2 is a central thickness of the second lens along the optical axis, R4 is a radius of curvature of the second side of the second lens, R1 is a radius of curvature of the first side of the first lens, R2 is a radius of curvature of the second side of the first lens, D1 is a clear aperture on the first side of the first lens corresponding to a maximum field of view of the optical lens, and TTL is a total optical length of the optical lens.

[0032] Thus, the optical lens adopts five lenses with optical power, the first side light first enters the first side of the first lens, and then exits from 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 from the second side 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 for large-angle light, and realizes high resolution; at the same time, the ratio between the curvature radii of the two sides of the first lens is controlled, that is, 1.5≤R1 / R2≤5.5, which is beneficial to the effective light collection of the first side of the first lens and the effective divergence of the second side of the first lens, so that the first lens can collect the light of the required field of view under the premise of a small aperture, and realize a small aperture at the front end of the optical lens. The divergent light exiting from the first lens enters the second lens: the first side of the second lens is concave, and the second side is convex, which can make the first lens and the second lens diverge the light gently under a small aperture, which is beneficial to realize a small aperture at the front end; at the same time, the curvature radii and the center thickness of the second lens are controlled, that is, 0.8≤(R3+d2) / R4≤1.5, which controls the second lens to have a special lens shape close to a concentric circle, so that the optical path difference between the peripheral light and the central light is small, and the light enters the rear optical system gently, which is beneficial to the optical lens to have low sensitivity and high stability. The light exiting from the second lens enters the third lens: the third lens has positive optical power, and the first side is convex, which can effectively converge the light in a divergent trend in front, and gently transition the light trend, so that the divergent light smoothly enters the rear optical system, which is beneficial to realize a small aperture and miniaturization. The light exiting from the third lens enters the fourth lens and the fifth lens: the fourth lens and the fifth lens have opposite signs of optical power, so that the light can smoothly reach the imaging surface after passing through the fourth lens and the fifth lens, and realize high resolution; at the same time, the light aperture on the first side of the first lens corresponding to the maximum field angle and the total length of the optical lens are controlled, that is, 0.1≤D1 / TTL≤0.35, which can make the optical lens have small size and high light quantity.

[0033] 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 optical power, a first side of the first lens being convex, a second side of the first lens being concave; a second lens having optical power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens having positive optical power, a first side of the third lens being convex; a fourth lens having optical power; and a fifth lens having optical power, a sign of the optical power of the fifth lens being opposite to that of the fourth lens; wherein the number of lenses having optical power in the optical lens is five; the second lens, the fourth lens and the fifth lens are plastic lenses; the optical lens satisfies 10≤|F2 / F| and -1.25≤F4 / F5≤-0.8; wherein F2 is an effective focal length of the second lens, F is a total effective focal length of the optical lens, F4 is an effective focal length of the fourth lens, and F5 is an effective focal length of the fifth lens.

[0034] In this way, the optical lens of the present application adopts five lenses with optical power, the first side light first enters the first side surface of the first lens and then exits from the second side surface of the first lens: the first lens has negative optical power, the first side surface is a convex surface, and the second side surface is a concave surface, which can collect and diverge the light of a large field of view, so that the light exiting from 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 for the light of a large angle, and high resolution is achieved. The divergent light exiting from the first lens enters the second lens: the first side surface of the second lens is a concave surface, and the second side surface is a convex surface, which can gently transition the light into the rear optical system and has good sensitivity and stability; at the same time, by controlling the absolute ratio between the effective focal length of the second lens and the total effective focal length of the optical lens, i.e. 10≤|F2 / F|, the second lens made of plastic has a larger focal length, which can effectively gently transition the light diverging from the front first lens, ensure that the overall trend of the light is less affected at this point, so that the optical lens has lower sensitivity and dynamic performance, and the imaging quality is improved. The light exiting from the second lens enters the third lens: the third lens has positive optical power, and the first side surface is a convex surface, which can effectively converge the light of a divergent trend in front, gently transition the light trend, so that the divergent light smoothly enters the rear optical system, which is beneficial to realize small aperture and miniaturization. The light exiting from the third lens enters the fourth lens and the fifth lens: the fourth lens and the fifth lens have opposite optical power, and at the same time, by controlling the ratio between the effective focal length of the fourth lens and the effective focal length of the fifth lens, i.e. -1.25≤F4 / F5≤-0.8, the focal lengths of the fourth lens and the fifth lens made of plastic are complementary in sign, so that the light trend between the fourth lens and the fifth lens is gentle, the overall trend of the light is less affected at this point, so as to realize the complementation of the optical power under high and low temperature changes, realize stable imaging quality, and ensure that the optical lens of the present application can balance the advantages of low cost and high and low temperature stability. BRIEF DESCRIPTION OF DRAWINGS

[0035] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings. Among which:

[0036] Figure 1 The structure diagram of the optical lens according to Embodiment 1 of the present application is shown;

[0037] Figure 2 The modulation transfer function (MTF) diagram of the optical lens according to Embodiment 1 of the present application is shown;

[0038] Figure 3A distortion diagram of the optical lens according to Embodiment 1 of the present application is shown;

[0039] Figure 4 A relative illumination diagram of the optical lens according to Embodiment 1 of the present application is shown;

[0040] Figure 5 A structure diagram of the optical lens according to Embodiment 2 of the present application is shown;

[0041] Figure 6 A modulation transfer function diagram of the optical lens according to Embodiment 2 of the present application is shown;

[0042] Figure 7 A distortion diagram of the optical lens according to Embodiment 2 of the present application is shown;

[0043] Figure 8 A relative illumination diagram of the optical lens according to Embodiment 2 of the present application is shown;

[0044] Figure 9 A structure diagram of the optical lens according to Embodiment 3 of the present application is shown;

[0045] Figure 10 A structure diagram of the optical lens according to Embodiment 4 of the present application is shown;

[0046] Figure 11 A structure diagram of the optical lens according to Embodiment 5 of the present application is shown;

[0047] Figure 12 A structure diagram of the optical lens according to Embodiment 6 of the present application is shown;

[0048] Figure 13 A structure diagram of the optical lens according to Embodiment 7 of the present application is shown;

[0049] Figure 14 A structure diagram of the optical lens according to Embodiment 8 of the present application is shown;

[0050] Figure 15 A structure diagram of the optical lens according to Embodiment 9 of the present application is shown;

[0051] Figure 16 A structure diagram of the optical lens according to Embodiment 10 of the present application is shown. DETAILED DESCRIPTION

[0052] 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 noted that these detailed description is merely descriptive of exemplary embodiments of the present application, and does not limit the scope of the present application in any manner. Throughout the specification, like drawing reference numerals will be understood to refer to like parts throughout the specification and the drawings.

[0053] It is to be noted that the expressions first, second, third, and the like in the present specification are used merely to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, 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.

[0054] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0055] In the present specification, 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.

[0056] It is also to be understood that the use of the terms "including", "including the", 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 groups thereof. Furthermore, as used in describing the embodiments of the present application, "can" means "one or more embodiments of the present application". Also, the use of the term "exemplary" is intended to present examples or implementations as non-limiting.

[0057] 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 will be further understood that terms, such as those defined in commonly used dictionaries, 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.

[0058] It is to 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 embodiments.

[0059] The features, principles, and other aspects of the present application are described in detail below.

[0060] The optical lens according to the exemplary embodiments of the present application can include, for example, five lenses with refractive powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are arranged in order from a first side to a second side along an optical axis.

[0061] In the 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 an 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 role of the light, the light transmitted to the object side space can be divided into projection light used to form a projection image or detection light used to detect target object information, etc.

[0062] 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 an object side, and the "second side" can refer to an image side (e.g., a side where a photosensor or a retina is located), i.e., light from the object side can be imaged on the image side. The camera lens can be, for example, 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 an object side, and the "second side" can refer to a light source side.

[0063] In some possible embodiments, the optical lens provided by the present application can also simultaneously assume light receiving and light emitting functions. For example, the optical lens provided by the present application is used in a laser radar system that shares a light path, and the optical lens simultaneously assumes the functions of emitting laser and receiving a radar return beam. For another example, the optical lens provided by the present application is used in a system that integrates optical communication and radar, and the optical lens simultaneously assumes the functions of emitting a modulated optical signal and receiving a radar return beam.

[0064] In an example embodiment, the first lens can have a negative focal power, the first side surface thereof can be convex, and the second side surface thereof can be concave. The first lens is a negative lens, capable of collecting large field of view light rays for divergence, so that the light rays exiting the second side surface of the first lens can enable the subsequent optical system to have a larger light ray receiving surface under the same field of view angle condition. The first side surface of the first lens is provided as convex, which can collect as much large field of view light rays as possible into the rear optical system, and in actual application scenarios (such as rainy and snowy weather, etc.), is conducive to the sliding of water droplets and reduces the impact on the imaging quality. The second side surface of the first lens is provided as concave, which can collect as much large field of view light rays as possible into the rear optical system, so that the light ray trend is smooth and transition, which is conducive to controlling the aperture of the rear lens and realizing miniaturized design.

[0065] In an example embodiment, the second lens can have a positive focal power or a negative focal power, the first side surface thereof can be concave, for example, and the second side surface thereof can be convex, for example.

[0066] In a first example, the second lens can have a positive focal power, the first side surface thereof can be concave, for example, and the second side surface thereof can be convex, for example. The second lens is a positive lens, capable of converging the light rays diverged by the first lens, which is conducive to reducing the front aperture and the total length of the system, increasing the lens aperture, and improving the light intake. The first side surface of the second lens is provided as concave, and the second side surface is provided as convex, so that the second lens is in a meniscus shape, ensuring that the optical path difference between the edge light rays and the central light rays is small, facilitating the smooth entry of light rays into the rear optical system, and being conducive to the optical lens having better sensitivity and high stability.

[0067] In a second example, the second lens can have a negative focal power, the first side surface thereof can be concave, for example, and the second side surface thereof can be convex, for example. The second lens is a negative lens, capable of adjusting the direction trend of different field of view light rays collected into the first lens, further diverging the light rays diverged by the first lens, which is conducive to the smooth transition of light rays and improves the resolution of the optical lens. The first side surface of the second lens is provided as concave, which can smoothly transition the light rays diverged by the first lens; the second side surface of the second lens is provided as convex, which can weaken the divergence trend of the light rays and smoothly enter the rear optical system, which is conducive to the optical lens having better sensitivity.

[0068] In an example embodiment, the third lens can have a positive focal power, the first side surface thereof can be convex, for example, and the second side surface thereof can be convex or flat, for example.

[0069] In the first example, the third 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 third lens is a positive lens, which can effectively converge the light rays in front of the lens that have a divergent trend, and is beneficial to realize small aperture and miniaturization. The first side surface and the second side surface of the third lens are both set to be convex, which can effectively compress the angle of the light rays emitted by the second lens, so that the divergent light rays smoothly enter the rear optical system, and further make the light ray trend transition smoothly, which is beneficial to reduce the front aperture of the lens.

[0070] In the second example, the third lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be flat. The third lens is a positive lens, which can effectively converge the light rays in front of the lens that have a divergent trend, and is beneficial to realize small aperture and miniaturization. The second side surface of the third lens is set to be flat, which has a smooth shape, so that the light rays emitted by the third lens are almost emitted vertically, which ensures that the light rays transition smoothly, generates less aberration, and can improve the resolving power of the optical system, and is beneficial to realize high resolution.

[0071] It is worth noting that the third lens can be implemented as a glass lens, so as to realize small temperature drift at high and low temperatures while bearing positive focal power.

[0072] In the exemplary embodiments, the fourth lens can have positive focal power or negative focal power.

[0073] In the first example, the fourth 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 fourth lens is a negative lens, which can diverge the light rays emitted by the third lens, so as to balance the aberration when the light rays of each market converge on the image plane, and is beneficial to improve the resolution. The first side surface of the fourth lens is set to be concave, which can cooperate with the second side surface of the third lens that is set to be convex, so that the light rays transition smoothly, ensures that the light rays deflect less, reduces the loss of light energy, and is beneficial to improve the illumination of the edge field of view; the second side surface of the fourth lens is set to be concave, which can cooperate with the first side surface of the fifth lens that is set to be convex, so that the light rays transition smoothly, reduces the generation of aberration, and is beneficial to realize small CRA (Chief Ray Angle).

[0074] In the second example, the fourth 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 fourth lens is a negative lens, and the first side surface thereof is set to be convex, so that the edge field of view light is deflected downward (i.e. toward the central optical axis) after the first side surface of the fourth lens, which is beneficial to reduce the front aperture.

[0075] In the third example, the fourth lens can have positive focal power, and its first side surface can be convex, and its second side surface can be convex. The fourth lens is a positive lens, and can continue to gently converge the light rays emitted in front of the third lens. The first side surface and the second side surface of the fourth lens are both set to be convex, so that the fourth lens has a biconvex shape, and can converge the light rays twice, which is beneficial to reduce aberration and achieve high resolution.

[0076] In the exemplary embodiments, the fifth lens can have positive focal power or negative focal power. However, the fifth lens has opposite positive or negative properties of the fourth lens, and can smoothly transition the light rays to the image plane.

[0077] In the first example, the fifth lens can have positive focal power, and its first side surface can be convex, and its second side surface can be convex. The fifth lens is a positive lens, and has a biconvex shape, which can further converge the light rays in front of the optical system to the rear, so as to achieve the effect of small CRA, and improve the resolution of the optical system.

[0078] In the second example, the fifth lens can have negative focal power, and its first side surface can be concave, and its second side surface can be concave. The fifth lens is a negative lens, and has a biconcave shape, which is beneficial to properly diffuse the light rays, and cooperate with the positive focal power of the fourth lens, so that the light rays converged by the fourth lens are further diverged. The first side surface of the fifth lens is set to be convex, which can cooperate with the second side surface of the fourth lens set to be convex, so that the light rays are smoothly transitioned, the light rays are less deflected, the light energy loss is reduced, and the illumination of the edge field of view is improved.

[0079] It is worth noting that the fourth lens and the fifth lens are bonded to form a bonded lens, which can effectively correct chromatic aberration, reduce the total length of the lens, and smoothly transition the light rays to the image plane, so as to optimize the CRA, illumination, distortion and other performances of the optical system. In addition, the negative focal power lens in the bonded lens can make the edge light rays and the center light rays of each field of view distinct, which is beneficial to the aberration correction of the center and edge light rays of each field of view, and is beneficial to achieve high resolution; the positive focal power lens in the bonded lens can collect the light rays entering through the third lens, so that the light rays are smoothly transitioned to the rear, so as to reduce the height of the light rays incident to the rear.

[0080] It can be understood that the advantages of the double-cemented lens are as follows: the negative-power lens in the cemented lens adopts a material with a high refractive index and a low Abbe number, the positive-power lens adopts a material with a relatively low refractive index and a high Abbe number, and the cementing of the lenses of the two materials can effectively correct the chromatic aberration of the optical system; the cemented lens can reduce the assembly components between the fourth lens and the fifth lens, which is conducive to reducing the process and the overall weight, reducing the cost; the cemented lens can also reduce the light energy loss caused by the reflection between the lenses, which is conducive to improving the illumination of the image plane and weakening the ghost image. In addition, since the transition of light is smooth when passing through the cemented surface, the tolerance sensitivity of the cemented lens to eccentricity and tilt between the fourth lens and the fifth lens is low, and therefore the tolerance sensitivity of the lens during assembly can be reduced.

[0081] It should be noted that, by reasonably allocating the focal lengths of the fourth lens and the fifth lens, and by using glass lenses for the fourth lens and the fifth lens, the thermal compensation can be achieved, and the performance of the optical lens at different temperatures can be improved.

[0082] In an example embodiment, the optical lens can further include a diaphragm, which can be arranged, for example, between the third lens and the fourth lens. By arranging the diaphragm between the third lens and the fourth lens, the light entering the optical system can be effectively collected, the lens aperture at the front and rear ends of the optical system can be reduced, and the sensitivity of the optical lens during assembly can be reduced. It should be understood that the arrangement of the diaphragm between the third lens and the fourth lens is only exemplary, and the present application does not make specific limitations thereon, and the diaphragm can also be arranged at other positions according to actual needs.

[0083] In an example embodiment, the optical lens can use at least one aspheric lens. For example, the second lens can be an aspheric lens, which is conducive to having a large angle resolution in the central region and improving the resolution; at the same time, it is also conducive to improving the field curvature and the astigmatism and improving the resolution capability. It should be understood that the aspheric lens can also be plasticized to achieve the demand for cost reduction without affecting the temperature performance.

[0084] In an example embodiment, the fourth lens and the fifth lens can have at least one inflection point. By such an arrangement, the aberration of the central field of view and the edge field of view can be balanced, and the resolution can be improved.

[0085] In an example embodiment, the optical lens can further include a filter between the fifth lens and the image plane to filter light with different wavelengths. It should be understood that the optical lens can also arrange a protective glass between the filter and the image plane according to actual needs to prevent the internal elements (for example, a chip) of the optical lens from being damaged.

[0086] 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).

[0087] 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: 3≤TTL / F≤4.8. Preferably, 3.5≤TTL / F≤4.65. Further, 3.94≤TTL / F≤4.522. By controlling the relationship, the ratio between the total optical length and the total effective focal length of the optical lens can be controlled to be small when the total effective focal length is unchanged, so that the total optical length of the optical lens is small, which is beneficial to miniaturization. It can be understood that the further range of each relationship disclosed in the present application (such as 3.94≤TTL / F≤4.522) can achieve better results and achieve higher imaging quality.

[0088] In the example embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: 10≤|F2 / F|. Preferably, 12≤|F2 / F|. Further, 12.359≤|F2 / F|≤11434.744. By controlling the relationship, the absolute value of the ratio between the effective focal length of the second lens and the total effective focal length of the optical lens is controlled to be within a reasonable range, so that the second lens has a small optical power, which can effectively and smoothly transition the light rays emitted by the first lens in front, ensuring that the optical lens has low sensitivity and dynamic performance, and improving the imaging quality. It should be understood that the greater the absolute value of the effective focal length of the second lens, the smaller the influence on the light rays. For example, in the following embodiment 4, the absolute value of the effective focal length of the second lens is 63051.181. When the absolute value of the effective focal length of the second lens is greater than 63051.181, especially when it is infinite, the second lens has little effect on the light rays, which is beneficial to the smooth transition of the light rays.

[0089] It is worth noting that the second lens can be implemented as a plastic lens. The present application can assign the second lens implemented as a plastic lens to have a large focal length, which can effectively and smoothly transition the light rays emitted by the first lens in front, ensure that the overall trend of the light rays is less affected at this point, so that the optical lens has low sensitivity and dynamic performance, which is beneficial to improve the imaging quality. At the same time, it also takes into account the advantages of low cost and high and low temperature stability of the optical lens.

[0090] 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: 1≤F3 / F≤1.8. Preferably, 1.25≤F3 / F≤1.7. Further, 1.422≤F3 / F≤1.654. By controlling the relationship, the effective focal length of the third lens is controlled so that the third lens has a large optical power, can effectively receive and converge the light rays emitted by the second lens, ensures that the optical lens has a small front aperture and a temperature drift effect, and realizes the stability of imaging.

[0091] It is worth noting that the present application can be through the relationship 3≤TTL / F≤4.8, the relationship 10≤|F2 / F| and the relationship 1≤F3 / F≤1.8, which are mutually matched, to realize high resolution while realizing the stability of imaging and taking into account miniaturization.

[0092] In the example embodiments, the optical back focal length BFL of the optical lens and the total length TL of the lens group of the optical lens can satisfy: 0.41≤BFL / TL≤0.55. Preferably, 0.42≤BFL / TL≤0.52. Further, 0.427≤BFL / TL≤0.494. By controlling the relationship, the optical back focal length and the total length of the lens group of the optical lens are reasonably controlled, which can realize miniaturization on the basis of making the back focal length of the optical lens longer, which is not only beneficial to the assembly of the lens module, but also makes the distance between the chip and the lens group of the imaging surface farther, which is beneficial to suppress the focusing of stray light and reduce ghost image reflection energy. It can be understood that the total length TL of the lens group mentioned in the present application refers to the distance on the optical axis from the first side of the first lens to the second side of the fifth lens.

[0093] In the example embodiments, the light passing aperture D1 on the first side of the first lens corresponding to the maximum field angle of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.1≤D1 / TTL≤0.35. Preferably, 0.25≤D1 / TTL≤0.335. Further, 0.287≤D1 / TTL≤0.324. By controlling the relationship, the ratio between the light passing aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens and the total optical length of the optical lens is controlled within a reasonable range, so that the optical lens takes into account miniaturization and high light quantity.

[0094] In exemplary embodiments, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens can satisfy: 2.5≤F45 / F≤17.5. Preferably, 2.85≤F45 / F≤12. Further, 3.13≤F45 / F≤8.098. By controlling the relationship, the combined focal length of the fourth lens and the fifth lens is controlled to be positive, and the ratio to the total effective focal length is reasonable, which can smoothly accept and gently converge light to the image plane, which is conducive to the light approximately vertically incident on the image plane, and a smaller CRA, such as less than or equal to 13.5°; at the same time, the sensitivity of the fourth lens and the fifth lens is low, which is conducive to the long back focus of the optical lens.

[0095] It is worth noting that the fourth lens and the fifth lens are both implemented as plastic lenses, and the present application can complement the positive and negative of the focal length of the fourth lens and the fifth lens which are set as plastic glued parts, so that the trend of light between the fourth lens and the fifth lens is gentle, and the overall trend of light is less affected at this point, so as to realize the complementation of the influence of optical power when the temperature changes, realize stable imaging quality, and thus ensure that the optical lens of the present application can balance low cost and high and low temperature stability and other advantages.

[0096] In exemplary embodiments, the curvature radius R1 of the first side surface of the first lens and the total effective focal length F of the optical lens can satisfy: 1≤R1 / F≤4.75. Preferably, 1.2≤R1 / F≤4.25. Further, 1.329≤R1 / F≤3.832. By controlling the relationship, the ratio of the curvature radius of the first side surface of the first lens to the total effective focal length is controlled to be small, which can collect more edge field light, and improve the relative illumination.

[0097] In exemplary embodiments, the center thickness d4 of the fourth lens on the optical axis, the center thickness d5 of the fifth lens on the optical axis, and the total effective focal length F of the optical lens can satisfy: 0.48≤(d4+d5) / F≤0.7. Preferably, 0.52≤(d4+d5) / F≤0.65. Further, 0.569≤(d4+d5) / F≤0.638. By controlling the relationship, the center thickness of the fourth lens and the fifth lens is reasonably controlled, which can make the light transition to the image plane gently in the rear group, which is conducive to reducing the sensitivity of the optical lens.

[0098] In the example embodiment, the radius of curvature R3 of the first side surface of the second lens, the central thickness of the second lens on the optical axis, and the radius of curvature R4 of the second side surface of the second lens can satisfy: 0.8≤(R3+d2) / R4≤1.5. Preferably, 0.9≤(R3+d2) / R4≤1.35. Further, 1.031≤(R3+d2) / R4≤1.282. By controlling the relationship, the radius of curvature of the two side surfaces of the second lens and the central thickness are controlled so that the second lens has a special lens shape close to a concentric circle, ensuring that the optical path difference between the edge light and the central light is small, so as to gently enter the rear optical system, which is beneficial to the optical lens to have lower sensitivity and high stability.

[0099] In the example embodiment, the clear aperture D1 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 total effective focal length F of the optical lens can satisfy: 0.1≤D1 / H / F×1mm≤0.3. Preferably, 0.15≤D1 / H / F×1mm≤0.25. Further, 0.196≤D1 / H / F×1mm≤0.224. By controlling the relationship, the optical lens can be provided with a large target surface and a small aperture under the condition that the total effective focal length is fixed.

[0100] In the example embodiment, the optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.25≤BFL / TTL≤0.375. Preferably, 0.275≤BFL / TTL≤0.35. Further, 0.299≤BFL / TTL≤0.331. By controlling the relationship, the special requirement that the back focal length of the optical lens is long is met, which not only can effectively weaken the large halo ghost image generated by a strong light source, but also can avoid the influence of car lights and other bright light sources on the recognition result, and facilitate the reservation of space for the installation and focusing of optical elements to avoid interference.

[0101] 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: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.02. Preferably, 0.8≤(H / 2) / (F×tan(θ / 2))≤0.95. Further, 0.821≤(H / 2) / (F×tan(θ / 2))≤0.91. 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 can realize that each field of view has a larger angular resolution, which is beneficial to improve the overall imaging quality of the optical lens.

[0102] In the example embodiments, the effective focal length F1 of the first lens and the effective focal length F3 of the third lens can satisfy -2.2≤F1 / F3≤-0.9. Preferably, -2≤F1 / F3≤-0.95. Further, -1.836≤F1 / F3≤-1.065. By controlling the relationship, the focal length ratio of the first lens and the third lens is reasonably controlled, so that the first lens and the third lens can balance each other, thereby facilitating the improvement of the imaging quality of the optical lens.

[0103] In the example embodiments, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens can satisfy 50°≤(FOVxF) / H≤70°. Preferably, 55°≤(FOVxF) / H≤65°. Further, 56.276°≤(FOVxF) / H≤63.306°. By controlling the relationship, the total effective focal length, the image height, and the maximum field of view of the optical lens are controlled, so that the optical lens can simultaneously satisfy long focal length and large field of view, and has large angular resolution.

[0104] In the example embodiments, the total optical 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 0<TTL / H / FOV×1°≤0.085. Preferably, 0.04≤TTL / H / FOV×1°≤0.075. Further, 0.058≤TTL / H / FOV×1°≤0.071. By controlling the relationship, a shorter total optical length can be obtained under the same imaging surface, which is beneficial to realize the miniaturization of the lens.

[0105] In the example embodiments, the clear aperture D1 on the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens can satisfy 0.01≤D1 / H / FOV×1°≤0.035. Preferably, 0.0125≤D1 / H / FOV×1°≤0.025. Further, 0.018≤D1 / H / FOV×1°≤0.021. By controlling the relationship, the front aperture can be ensured to be small under the condition that the maximum field of view and the corresponding image height are unchanged, which is beneficial to realize the miniaturization of the optical lens.

[0106] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy 0.7≤F / H≤1.5. Preferably, 0.8≤F / H≤1.2. Further, 0.879≤F / H≤1.055. By controlling the relationship, the total effective focal length and the image height of the optical lens are reasonably controlled, which is beneficial to the optical system to improve the imaging quality while satisfying long focal length and large target surface.

[0107] In the example embodiments, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy: 1.75≤F / ENPD≤2.4. Preferably, 1.8≤F / ENPD≤2. Further, 1.852≤F / ENPD≤1.855. By controlling the relationship, the total effective focal length and the entrance pupil diameter of the optical lens are reasonably controlled, which can achieve a small FNO (f-number) of the optical lens, and is conducive to increasing the light quantity and improving the relative luminance.

[0108] In the example embodiments, the total effective focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens and the light passing aperture D1 of the first side of the first lens corresponding to the maximum field angle of the optical lens can satisfy: 0.15≤F / ENPD / D1×1mm≤0.3. Preferably, 0.2≤F / ENPD / D1×1mm≤0.28. Further, 0.249≤F / ENPD / D1×1mm≤0.268. By controlling the relationship, the small aperture can be ensured under the premise of satisfying the high light quantity, and the miniaturization of the optical lens can be achieved.

[0109] 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: -3≤F1 / F≤-1.25. Preferably, -2.8≤F1 / F≤-1.5. Further, -2.684≤F1 / F≤-1.711. By controlling the relationship, the ratio of the effective focal length of the first lens to the total effective focal length is controlled within a reasonable range, which can collect large field light, achieve large field angle imaging, and improve the light quantity of the optical lens.

[0110] In the example embodiments, the curvature radius R5 of the first side of the third lens and the total effective focal length F of the optical lens can satisfy: 1.1≤R5 / F≤15. Preferably, 1.25≤R5 / F≤10. Further, 1.327≤R5 / F≤7.225. By controlling the relationship, the central curvature radius of the first side of the third lens is controlled to be small, which can effectively converge the light rays diverging in front, facilitate the compression of the lens volume, and leave space for the smooth convergence of light rays in the rear, and achieve the long back focus of the optical lens.

[0111] In the example embodiment, the axial distance d23 from the second side surface of the second lens to the first side surface of the third lens and the central thickness d3 of the third lens on the optical axis can satisfy: 0.2≤d23 / d3≤2.5. Preferably, 0.24≤d23 / d3≤2. Further, 0.255≤d23 / d3≤1.756. By controlling the ratio between the air gap between the second lens and the third lens and the central thickness of the third lens, the light rays emitted by the second lens can be moderately divergent, and the light rays can be smoothly transitioned when entering the third lens due to the thick central thickness of the third lens, so as to reduce the sensitivity.

[0112] In the example embodiment, the central thickness d1 of the first lens on the optical axis and the total length TL of the lens group of the optical lens can satisfy: 0.04≤d1 / TL≤0.12. Preferably, 0.05≤d1 / TL≤0.095. Further, 0.062≤d1 / TL≤0.086. By controlling the relationship, the central thickness of the first lens and the total length of the lens group of the optical lens are small, so that the central thickness of the first lens is small, which can compress the total optical length of the optical system and realize miniaturization while ensuring imaging quality.

[0113] In the example embodiment, the effective focal length F3 of the third lens and the effective focal length F2 of the second lens can satisfy: 0<|F3 / F2|≤0.2. Preferably, 0<|F3 / F2|≤0.165. Further, 0<|F3 / F2|≤0.134. By controlling the relationship, the optical power of the second lens and the third lens is reasonably distributed, so that the focal length of the second lens is large and the focal length of the third lens is small, which is beneficial for the smooth transition of the converging light rays, ensures that the optical lens has better sensitivity and stability, and realizes the effect of good high and low temperature performance such as temperature drift.

[0114] In the example embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens can satisfy: 1.5≤R1 / R2≤5.5. Preferably, 1.8≤R1 / R2≤5.4. Further, 2.008≤R1 / R2≤5.316. By controlling the relationship, the ratio of the radii of curvature of the two sides of the first lens is reasonably controlled, which is beneficial for the first side surface of the first lens to collect light and the second side surface to effectively diverge light rays, and the first lens can collect light rays of the required field of view under the premise of small aperture.

[0115] In the example embodiments, the axial distance d23 from the second side surface of the second lens to the first side surface of the third lens and the axial distance d12 from the second side surface of the first lens to the first side surface of the second lens can satisfy: 0.3≤d23 / d12≤2.6. Preferably, 0.35≤d23 / d12≤2.5. Further, 0.366≤d23 / d12≤2.436. By controlling the relationship, the air gap between the second lens and the front and rear lenses is controlled, which can effectively diverge the light beam in front of the system, and the light beam is compressed in the lenses after entering the third lens, which is beneficial to the gentle convergence in the rear, and finally is beneficial to the realization of the long back focus of the optical lens.

[0116] In the example embodiments, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens can satisfy: -1.25≤F4 / F5≤-0.8. Preferably, -1.2≤F4 / F5≤-0.95. Further, -1.195≤F4 / F5≤-1.005. By controlling the relationship, the focal length ratio of the fourth lens and the fifth lens is reasonably controlled, so that the light beam has a gentle trend between the fourth lens and the fifth lens, and the complement of the influence of optical power is realized when the temperature changes, which is beneficial to the realization of stable imaging quality.

[0117] In the example embodiments, the maximum light passing aperture Dmax on the first side surface and the second side surface of the first lens and the second lens corresponding to the maximum field of view angle of the optical lens and the minimum light passing aperture Dmin on the first side surface and the second side surface of the first lens and the second lens corresponding to the maximum field of view angle of the optical lens can satisfy: 1.15≤Dmax / Dmin≤1.85. Preferably, 1.25≤Dmax / Dmin≤1.65. Further, 1.367≤Dmax / Dmin≤1.501. By controlling the relationship, the effective light passing apertures of the first lens and the second lens are controlled to be small, so that the light beam has a gentle change in height on the premise of collecting enough light, and the sensitivity of the optical lens is ensured to be low.

[0118] It is worth noting that the second lens can be set as a concave-convex meniscus lens by the cooperation of the relationship 0.8≤(R3+d2) / R4≤1.5, the relationship 1.5≤R1 / R2≤5.5, and the relationship 0.1≤D1 / TTL≤0.35, which can make the first lens and the second lens have a gentle divergence of the light beam at a small aperture, and is beneficial to the realization of the front small aperture, and takes into account the high stability and high light passing amount.

[0119] In addition, the second lens has a larger focal length, and the fourth lens and the fifth lens have complementary positive and negative focal lengths, which can allow the light to transition smoothly, and the overall trend is less affected, so that the optical lens has better sensitivity, and also has the advantages of low cost and high stability.

[0120] The optical lens according to the above embodiments of the present application can use multiple lenses, for example, five lenses as 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.

[0121] 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 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 of the fifth 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.

[0122] In addition, the present application focuses on protecting the lens architecture, and the lens surface shape 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.

[0123] 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 present application, to obtain the various results and advantages described in the present specification. For example, although five lenses are described as an example in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens can also include other numbers of lenses.

[0124] The specific embodiments of the optical lens applicable to the above 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, such as the curvature radius and the thickness / distance, are mm.

[0125] Embodiment 1

[0126] The following refers to Figure 1 An optical lens according to Embodiment 1 of the present application is described.

[0127] like Figure 1 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens.

[0128] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0129] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0130] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0131] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0132] The fifth lens L5 has positive optical power, and its first side surface is convex, and its second side surface S9 is convex.

[0133] An image plane IMA is disposed on the second side of the optical lens. A filter IR is disposed between the fifth lens L5 and the image plane IMA. The filter IR has a first side surface S10 and a second side surface S11. A protective glass CG is disposed between the filter IR and the image plane IMA. The protective glass CG has a first side surface S12 and a second side surface S13. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0134] Table 1 shows the basic parameters of the optical lens of Embodiment 1. It should be understood that the first side surface of the fifth lens L5 has exactly the same surface profile parameters as the second side surface S8 of the fourth lens L4.

[0135] Table 1

[0136]

[0137] In Embodiment 1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. The surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0138] ;

[0139] wherein x is the sag of the aspherical surface at a position along the optical axis at a height h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2-1 and Table 2-2 give the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for the aspherical surfaces S3, S4, S7, S8, and S9 in Example 1.

[0140] Table 2-1

[0141]

[0142] Table 2-2

[0143]

[0144] From the perspective of Figure 2 , the MTF peak values of each field of view of the optical lens of Example 1 can reach above 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); from the perspective of Figure 3 , the optical lens of Example 1 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; from the perspective of Figure 4 , the relative luminance of the optical lens of Example 1 at the edge reaches 0.71. Therefore, the optical lens given in Example 1 has good imaging quality and can achieve a high resolution of two million to three million pixels.

[0145] Example 2

[0146] The optical lens according to Example 2 of the present application is described below with reference to Figure 5 . As shown in Figure 5 , the main difference between this embodiment and Example 1 is that the radii of curvature, lens thickness, and other optical parameters of the lens surfaces are different.

[0147] Table 3 shows the basic parameter table of the optical lens of Example 2.

[0148] Table 3

[0149]

[0150] In Embodiment 2, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Table 4-1 and Table 4-2 give the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in Embodiment 2.

[0151] Table 4-1

[0152]

[0153] Table 4-2

[0154]

[0155] From the perspective of the MTF curves of the optical lens of Embodiment 2, the MTF peak values of each field of view of the optical lens of Embodiment 2 can all reach above 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); from the perspective of the distortion curves of the optical lens of Embodiment 2, the optical lens of Embodiment 2 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; from the perspective of the relative illumination curves of the optical lens of Embodiment 2, the relative illumination of the optical lens of Embodiment 2 at the edge reaches 0.69. Therefore, the optical lens given in Embodiment 2 has good imaging quality and can achieve a high resolution of two million to three million pixels. Figure 6 Figure 7 Figure 8

[0156] Embodiment 3

[0157] The optical lens according to Embodiment 3 of the present application is described below with reference to Figure 9 As shown in FIG. 3, the main differences between Embodiment 3 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, and the second lens L2 has positive focal power. Figure 9

[0158] Table 5 shows the basic parameter table of the optical lens of Embodiment 3.

[0159] Table 5

[0160]

[0161] ​​​​In Embodiment 3, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Table 6-1 and Table 6-2 show the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in Embodiment 3.

[0162] Table 6-1

[0163]

[0164] Table 6-2

[0165]

[0166] It is tested that the optical lens given in Embodiment 3 has good imaging quality and can achieve a high resolution of two million to three million pixels.

[0167] Embodiment 4

[0168] The following refers to Figure 10 An optical lens according to Embodiment 4 of the present application is described. As shown in FIG. 4, 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, and the second lens L2 has a positive focal power. Figure 10 Table 7 shows the basic parameter table of the optical lens of Embodiment 4.

[0169] Table 7

[0170]

[0171] In Embodiment 4, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Table 8-1 and Table 8-2 show the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in Embodiment 4.

[0172] Table 8-1

[0173]

[0174] Table 8-2

[0175]

[0176] ​

[0177] Tests have shown that the optical lens provided in Example 4 has good imaging quality and can achieve a high resolution of two to three million pixels.

[0178] Example 5

[0179] The following is for reference Figure 11 Describes an optical lens according to Embodiment 5 of this application. For example... Figure 11 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is a convex surface.

[0180] Table 9 shows the basic parameters of the optical lens of Example 5.

[0181] Table 9

[0182]

[0183] In Example 5, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Tables 10-1 and 10-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for the aspherical surfaces S3, S4, S7, S8, and S9 in Example 5.

[0184] Table 10-1

[0185]

[0186] Table 10-2

[0187]

[0188] Tests have shown that the optical lens provided in Example 5 has good image quality and can achieve a high resolution of two to three million pixels.

[0189] Example 6

[0190] The following is for reference Figure 12 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 12 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; and the first side surface S7 of the fourth lens L4 is a convex surface.

[0191] Table 11 shows the basic parameters of the optical lens of Example 6.

[0192] Table 11

[0193]

[0194] In Example 6, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Tables 12-1 and 12-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for the aspherical surfaces S3, S4, S7, S8, and S9 in Example 6.

[0195] Table 12-1

[0196]

[0197] Table 12-2

[0198]

[0199] Tests have shown that the optical lens provided in Example 6 has good imaging quality and can achieve a high resolution of two to three million pixels.

[0200] Example 7

[0201] The following is for reference Figure 13 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 13 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the fourth lens L4 has positive optical power, the first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 is convex; the fifth lens L5 has negative optical power, the first side surface of the fifth lens L5 is concave, and the second side surface S9 is concave; the second side surface S9 of the fifth lens L5 has at least one inflection point.

[0202] Table 13 shows the basic parameters of the optical lens of Example 7.

[0203] Table 13

[0204]

[0205] In Embodiment 7, the first side S3 and the second side S4 of the second lens L2, the first side S7 and the second side S8 of the fourth lens L4, and the first side and the second side S9 of the fifth lens L5 are all aspherical surfaces. Table 14-1 and Table 14-2 show the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in Embodiment 7.

[0206] Table 14-1

[0207]

[0208] Table 14-2

[0209]

[0210] It is tested that the optical lens given in Embodiment 7 has good imaging quality and can achieve a high resolution of two million to three million pixels.

[0211] Embodiment 8

[0212] The following refers to Figure 14 An optical lens according to Embodiment 8 of the present application is described. As shown in Figure 14 the main differences between the present embodiment and Embodiment 1 are that the radii of curvature, the thicknesses, and other optical parameters of the surfaces of the lenses are different, that the fourth lens L4 has a positive focal power, the first side S7 of the fourth lens L4 is a convex surface, and the second side S8 is a convex surface, that the fifth lens L5 has a negative focal power, the first side of the fifth lens L5 is a concave surface, and the second side S9 is a concave surface, and that the second side S9 of the fifth lens L5 has at least one inflection point.

[0213] Table 15 shows the basic parameter table of the optical lens of Embodiment 8.

[0214] Table 15

[0215]

[0216] In Embodiment 8, the first side S3 and the second side S4 of the second lens L2, the first side S7 and the second side S8 of the fourth lens L4, and the first side and the second side S9 of the fifth lens L5 are all aspherical surfaces. Table 14-1 and Table 14-2 show the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in Embodiment 7.

[0217] Table 16-1

[0218]

[0219] Table 16-2

[0220]

[0221] Tests have shown that the optical lens provided in Example 8 has good imaging quality and can achieve a high resolution of two to three million pixels.

[0222] Example 9

[0223] The following is for reference Figure 15 Describes an optical lens according to Embodiment 9 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 second side surface of the third lens L3 is flat, and the first side surface S7 of the fourth lens L4 is convex; the first side surface S7 of the fourth lens L4 has at least one inflection point. Table 17 shows the basic parameters of the optical lens of Embodiment 9.

[0224] Table 17

[0225]

[0226] In Example 9, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Tables 18-1 and 18-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 that can be used for each aspherical surface S3, S4, S7, S8, and S9 in Example 9.

[0227] Table 18-1

[0228]

[0229] Table 18-2

[0230]

[0231] Tests have shown that the optical lens provided in Example 9 has good imaging quality and can achieve a high resolution of two to three million pixels.

[0232] Example 10

[0233] The following is for reference Figure 16 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 16As shown, the main difference between the present embodiment and embodiment 1 is that the optical parameters of the lens surfaces, such as the radius of curvature and the thickness of the lenses, are different; and the second side surface of the third lens L3 is a plane, and the first side surface S7 of the fourth lens L4 is a convex surface; the first side surface S7 of the fourth lens L4 has at least one inflection point. Table 19 shows the basic parameter table of the optical lens of embodiment 10.

[0234] Table 19

[0235]

[0236] In embodiment 10, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S7 and the second side surface S8 of the fourth lens L4, and the first side surface and the second side surface S9 of the fifth lens L5 are all aspherical surfaces. Table 20-1 and Table 20-2 give the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspherical surfaces S3, S4, S7, S8, and S9 used in embodiment 10.

[0237] Table 20-1

[0238]

[0239] Table 20-2

[0240]

[0241] It has been tested that the optical lens given in embodiment 10 has good imaging quality and can achieve a high resolution of two million to three million pixels.

[0242] Table 21-1 and Table 21-2 give the basic parameters of the optical lenses in embodiments 1 to 10, such as FOV, F, H, TTL, BFL, ENPD, θ, F2, F3, R3, d2, R4, F1, F45, R5, d23, d3, d4, d5, d1, TL, R1, R2, d12, F4, F5, D1, D2, D3, D4, Dmax, and Dmin. The unit of the parameter FOV in the table is °, the parameter θ is the radian value corresponding to the parameter FOV, and the units of the other parameters are mm.

[0243] Table 21-1

[0244]

[0245] Table 21-2

[0246]

[0247] In summary, the relationship of each of Embodiments 1 to 10 satisfies the relationships shown in Table 22-1 and Table 22-2.

[0248] Table 22-1

[0249]

[0250] Table 22-2

[0251]

[0252] The present application also provides an electronic device comprising the optical lens and at least one of an imaging element and a light source in the above example embodiments; 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 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.

[0253] Notably, the electronic device can be implemented as a laser radar, 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, in the case that 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 on 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.

[0254] In the case that 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 on 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.

[0255] In addition, in the case that the electronic device is a laser radar, the receiving end lens of the laser radar 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.

[0256] 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.

[0257] It is worth mentioning that the application also provides a vehicle, which can include the above electronic device for obtaining information.

[0258] 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, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface of the first lens is concave; A second lens with optical power, wherein the first side surface of the second lens is concave and the second side surface of the second lens is convex; A third lens with positive optical power, wherein the first side surface of the third lens is convex; A fourth lens with optical power; and A fifth lens having optical power, wherein the sign of the optical power of the fifth lens is opposite to that of the fourth lens; The optical lens contains five lenses with optical power. The optical lens satisfies: 3≤TTL / F≤4.8, 10≤|F2 / F| and 1≤F3 / F≤1.8; Wherein, TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens.

2. The optical lens according to claim 1, characterized in that, The second lens has positive or negative optical power.

3. The optical lens according to claim 1, characterized in that, The second side surface of the third lens is either convex or flat.

4. The optical lens according to claim 1, characterized in that, The fourth lens has negative optical power, the first side of the fourth lens is concave or convex, and the second side of the fourth lens is concave. Alternatively, the fourth lens may have positive optical power, and the first side surface of the fourth lens may be convex, and the second side surface of the fourth lens may be convex.

5. The optical lens according to claim 1, characterized in that, The fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. Alternatively, the fifth lens may have negative optical power, and the first side surface of the fifth lens may be concave, and the second side surface of the fifth lens may be concave.

6. The optical lens according to claim 1, characterized in that, The fourth lens and the fifth lens are cemented together; the combined focal length of the fourth lens and the fifth lens is positive.

7. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: 0.41≤BFL / TL≤0.55; Wherein, BFL is the optical back focal length of the optical lens, and TL is the total length of the lens group of the optical lens.

8. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies the following condition: 0.1 ≤ D1 / TTL ≤ 0.35; Wherein, D1 is the aperture diameter on the first side of the first lens corresponding to the maximum field of view of the optical lens, and TTL is the total optical length of the optical lens.

9. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies the following conditions: 2.5 ≤ F45 / F ≤ 17.5; Wherein, F45 is the combined focal length of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens.

10. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: 1 ≤ R1 / F ≤ 4.75; Wherein, R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens.

11. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: 0.48≤(d4+d5) / F≤0.7; Wherein, d4 is the center thickness of the fourth lens on the optical axis, d5 is the center thickness of the fifth lens on the optical axis, and F is the total effective focal length of the optical lens.

12. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: 0.8 ≤ (R3 + d2) / R4 ≤ 1.5; Wherein, R3 is the radius of curvature of the first side surface of the second lens, d2 is the center thickness of the second lens on the optical axis, and R4 is the radius of curvature of the second side surface of the second lens.

13. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies the following condition: 0.1 ≤ D1 / H / F × 1mm ≤ 0.3; Wherein, D1 is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens.

14. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies the following condition: 0.25 ≤ BFL / TTL ≤ 0.375; Wherein, BFL is the optical back focal length of the optical lens, and TTL is the total optical length of the optical lens.

15. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: 0.7≤(H / 2) / (F×tan(θ / 2))≤1.02; Wherein, H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view of the optical lens.

16. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies: -2.2≤F1 / F3≤-0.9; Wherein, F1 is the effective focal length of the first lens, and F3 is the effective focal length of the third lens.

17. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies at least one of the following relationships: 50°≤(FOV×F) / H≤70°, 0<TTL / H / FOV×1°≤0.085, 0.01≤D1 / H / FOV×1°≤0.035, 0.7≤F / H≤1.5, 1.75≤F / ENPD≤2.4, 0.15≤F / ENPD / D1×1mm≤0.3, -3 ≤F1 / F≤-1.25, 1.1≤R5 / F≤15, 0.2≤d23 / d3≤2.5, 0.04≤d1 / TL≤0.12, 0<|F3 / F2|≤0.2, 1.5≤R1 / R2≤5.5, 0.3≤d23 / d12≤2.6, -1.25≤F4 / F5≤-0.8 and 1.15≤Dmax / Dmin≤1.85; Wherein, FOV is the maximum field of view 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 of view of the optical lens, TTL is the total optical length of the optical lens, D1 is the aperture diameter on the first side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, F1 is the effective focal length of the first lens, R5 is the radius of curvature of the first side of the third lens, d23 is the axial distance from the second side of the second lens to the first side of the third lens, d3 is the center thickness of the third lens on the optical axis, d1 is the center thickness of the first lens on the optical axis, and TL is the optical length of the optical lens. The total length of the lens group, F3 is the effective focal length of the third lens, F2 is the effective focal length of the second lens, R1 is the radius of curvature of the first side surface of the first lens, R2 is the radius of curvature of the second side surface of the first lens, d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, Dmax is the maximum aperture corresponding to the maximum field of view of the optical lens on the first and second side surfaces of the first and second lenses, and Dmin is the minimum aperture corresponding to the maximum field of view of the optical lens on the first and second side surfaces of the first and second lenses.

18. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies at least one of the following relationships: 55°≤(FOV×F) / H≤65°, 3.5≤TTL / F≤4.65, 0.04≤TTL / H / FOV×1°≤0.075, 0.0125≤D1 / H / FOV×1°≤0.025, 0.15≤D1 / H / F×1mm≤0.25, 0.275≤BFL / TTL≤0.35, 0.42≤BFL / TL≤0.52, 0.8≤F / H≤1.2, 1.8≤F / ENPD≤2, 0.2≤F / ENPD / D1×1mm≤0.28, 0.8≤(H / 2) / (F×tan(θ / 2))≤0.95, 12≤|F2 / F|, 1.25≤F3 / F≤1.7, 0.25≤D1 / TTL≤0.335, 0.9≤(R3+d2) / R4≤1.35, -2.8≤F1 / F≤-1.5, 2.85≤F45 / F≤12, 1.25≤R5 / F≤10, 0.24≤d23 / d3≤2, 0.52≤(d4+d5) / F≤0.65, 0.055 ≤d1 / TL≤0.095, 0<|F3 / F2|≤0.165, 1.2≤R1 / F≤4.25, -2≤F1 / F3≤-0.95, 1.8≤R1 / R2≤5.4, 0.35≤d23 / d12≤2.5, -1.2≤F4 / F5≤-0.95 and 1.25≤Dmax / Dmin≤1.65; Wherein, FOV is the maximum field of view 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 of view of the optical lens, TTL is the total optical length of the optical lens, D1 is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, TL is the total length of the lens group of the optical lens, ENPD is the entrance pupil diameter of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, R3 is the radius of curvature of the first side of the second lens, d2 is the center thickness of the second lens on the optical axis, R4 is the radius of curvature of the second side of the second lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth and fifth lenses, R5 is the radius of curvature of the first side of the third lens, d 23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens; d3 is the center thickness of the third lens on the optical axis; d4 is the center thickness of the fourth lens on the optical axis; d5 is the center thickness of the fifth lens on the optical axis; d1 is the center thickness of the first lens on the optical axis; R1 is the radius of curvature of the first side surface of the first lens; R2 is the radius of curvature of the second side surface of the first lens; d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens; F4 is the effective focal length of the fourth lens; F5 is the effective focal length of the fifth lens; Dmax is the maximum aperture corresponding to the maximum field of view of the optical lens on the first and second sides of the first and second lenses; Dmin is the minimum aperture corresponding to the maximum field of view of the optical lens on the first and second sides of the first and second lenses.

19. The optical lens according to any one of claims 1 to 6, characterized in that, The optical lens satisfies at least one of the following relationships: 56.276°≤(FOV×F) / H≤63.306°, 3.94≤TTL / F≤4.522, 0.058≤TTL / H / FOV×1°≤0.071, 0.018≤D1 / H / FOV×1°≤0.021, 0.196≤D1 / H / F×1mm≤0.224, 0.299≤BFL / TTL ≤0.331, 0.427≤BFL / TL≤0.494, 0.879≤F / H≤1.055, 1.852≤F / ENPD≤1.855, 0.249≤F / ENPD / D1×1mm≤0.268, 0.821≤(H / 2) / (F×tan(θ / 2))≤0.91, 12.359≤|F2 / F|≤11434.744, 1.422≤F 3 / F≤1.654, 0.287≤D1 / TTL≤0.324, 1.031≤(R3+d2) / R4≤1.282, -2.684≤F1 / F≤-1.711, 3.1 3≤F45 / F≤8.098, 1.327≤R5 / F≤7.225, 0.255≤d23 / d3≤1.756, 0.569≤(d4+d5) / F≤0.638, 0. 0.62≤d1 / TL≤0.086, 0<|F3 / F2|≤0.134, 1.329≤R1 / F≤3.832, -1.836≤F1 / F3≤-1.065, 2.008≤R1 / R2≤5.316, 0.366≤d23 / d12≤2.436, -1.195≤F4 / F5≤-1.005 and 1.367≤Dmax / Dmin≤1.501; Wherein, FOV is the maximum field of view 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 of view of the optical lens, TTL is the total optical length of the optical lens, D1 is the aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, TL is the total length of the lens group of the optical lens, ENPD is the entrance pupil diameter of the optical lens, θ is the radian value of the maximum field of view of the optical lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, R3 is the radius of curvature of the first side of the second lens, d2 is the center thickness of the second lens on the optical axis, R4 is the radius of curvature of the second side of the second lens, F1 is the effective focal length of the first lens, F45 is the combined focal length of the fourth and fifth lenses, R5 is the radius of curvature of the first side of the third lens, d 23 is the axial distance from the second side surface of the second lens to the first side surface of the third lens; d3 is the center thickness of the third lens on the optical axis; d4 is the center thickness of the fourth lens on the optical axis; d5 is the center thickness of the fifth lens on the optical axis; d1 is the center thickness of the first lens on the optical axis; R1 is the radius of curvature of the first side surface of the first lens; R2 is the radius of curvature of the second side surface of the first lens; d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens; F4 is the effective focal length of the fourth lens; F5 is the effective focal length of the fifth lens; Dmax is the maximum aperture corresponding to the maximum field of view of the optical lens on the first and second sides of the first and second lenses; Dmin is the minimum aperture corresponding to the maximum field of view of the optical lens on the first and second sides of the first and second lenses.

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

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