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 second side of the first lens being a concave surface; a second lens with 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 with positive optical power; a fourth lens with positive optical power, a first side of the fourth lens being a convex surface; a fifth lens with optical power, a first side of the fifth lens being a convex surface; a sixth lens with optical power, a sign of the optical power of the sixth lens being opposite to that of the fifth lens; and a seventh lens with optical power; wherein the number of lenses with optical power in the optical lens is seven; the optical lens satisfies: 4≤TTL / F≤5, 1.2≤F4 / F≤2.2, 0<|F / F7|≤0.45 and 0.7≤F / H≤0.92.

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 development of science and technology, the intelligentization of automobiles has become a development trend, and the advanced driver assistance system (ADAS) is an important embodiment of the intelligentization. The vehicle-mounted lens is the "eyes" of the entire ADAS system, and through front-view, rear-view and surround-view cameras, it can obtain all-around information inside and outside the vehicle, help the driver obtain road information, and thus help the driver make correct judgments and avoid vicious consequences caused by limited vision.

[0003] Based on the appearance and installation problems, most vehicle-mounted lenses adopt a hidden installation method, which puts forward higher requirements for the small aperture and miniaturization of the vehicle-mounted lens. In order to adapt to the complex environment corresponding to automatic driving, not only the target close to the front of the vehicle needs to be concerned, but also the target far away needs to be concerned; not only the road environment outside the vehicle needs to be observed, but also the state of the driver and passengers inside the vehicle needs to be monitored; in order to obtain long-distance perception, based on the above functional requirements, the lens is required to have the performance of miniaturization, long focal length, and clear imaging in a small field of view.

[0004] However, the conventional optical lens cannot simultaneously meet the requirements of high resolution and miniaturization, and cannot simultaneously meet the requirements of long focal length and miniaturization. SUMMARY

[0005] A 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 refractive power, a second side of the first lens being a concave surface; a second lens having a refractive 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 refractive power; a fourth lens having a positive refractive power, a first side of the fourth lens being a convex surface; a fifth lens having a refractive power, a first side of the fifth lens being a convex surface; a sixth lens having a refractive power, a sign of the refractive power of the sixth lens being opposite to that of the fifth lens; and a seventh lens having a refractive power; wherein the number of lenses having a refractive power in the optical lens is seven; the optical lens satisfies: 4≤TTL / F≤5, 1.2≤F4 / F≤2.2, 0<|F / F7|≤0.45 and 0.7≤F / H≤0.92; wherein TTL is the total optical length of the optical lens, F is the total effective focal length of the optical lens, F4 is the effective focal length of the fourth lens, F7 is the effective focal length of the seventh lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0006] In this way, the optical lens of the present application adopts seven lenses with optical power, the first side light first enters the first side of the first lens, and then exits through the second side of the first lens: the first lens has negative optical power, and the second side thereof is a concave surface, which not only can diverge light to ensure that the light exiting through the second side of the first lens can provide a larger light receiving surface for the subsequent optical system under the same field of view angle condition, but also can quickly diverge the large-angle light exiting through the second side of the first lens, which is beneficial to the correction of the aberration of the large-angle light by the rear optical system, and realizes high resolution. The diverging light exiting the first lens enters the second lens: the first side of the second lens is a concave surface, which can diverge light, is beneficial to receiving the light diverged by the second side of the first lens, and makes the light exit smoothly, which is beneficial to improving the field curvature and other axial external aberrations; the second side of the second lens is a convex surface, which can reduce the incidence height of the large-angle light, and further reduce the rear end aperture of the lens, which is beneficial to the miniaturization of the lens. The light exiting the second lens enters the third lens: the third lens has positive optical power, which can converge the front light, is beneficial to more light smoothly entering the rear optical system, improves the light throughput, converges the diverging light in front, and improves the imaging quality. The light exiting the third lens enters the fourth lens: the fourth lens has positive optical power, and the first side thereof is a convex surface, which can converge the front light and reduce the rear end aperture; at the same time, by controlling the ratio between the effective focal length of the fourth lens and the total effective focal length of the optical lens, i.e. 1.2≤F4 / F≤2.2, the focal length of the fourth lens is controlled to be small, which is beneficial to effectively compressing the light in the fourth lens, making the light converge and deflect inward, which is beneficial to the subsequent light reaching the image plane as soon as possible, and compressing the aperture, and realizing the miniaturization of the optical lens. The light exiting the fourth lens enters the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite optical power, and the first side of the fifth lens is a convex surface, so that the light can smoothly transition to the imaging plane after passing through the fifth lens and the sixth lens, reducing the optical total length and realizing high resolution. The light exiting the sixth lens enters the seventh lens: by controlling the absolute ratio between the total effective focal length F of the optical lens and the effective focal length F7 of the seventh lens, i.e. 0<|F / F7|≤0.45, the focal length of the seventh lens is controlled to be large, which is beneficial to improving the imaging quality, and also beneficial to the seventh lens being closer to the image plane, which can realize a smaller back focus and optical total length, and realize a large image surface. In addition, by controlling the ratio between the optical total length and the total effective focal length of the optical lens, i.e. 4≤TTL / F≤5, the ratio between the optical total length and the total effective focal length of the optical lens can be reasonably controlled under the condition that the focal length is unchanged, so that the optical lens realizes long-focus characteristics, effectively limits the lens length, and is beneficial to miniaturization; and by controlling the ratio between the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens, i.e. 0.7≤F / H≤0.92, the total effective focal length and the image height of the optical lens can be reasonably controlled, which can realize high resolution.

[0007] According to one exemplary embodiment of the present application, the first side surface of the first lens is convex or concave.

[0008] According to one exemplary embodiment of the present application, the second lens has positive or negative power.

[0009] According to one exemplary embodiment of the present application, the first side surface of the third lens is convex, and the second side surface of the third lens is convex or concave.

[0010] According to one exemplary embodiment of the present application, the first side surface of the third lens is concave, and the second side surface of the third lens is convex.

[0011] According to one exemplary embodiment of the present application, the second side surface of the fourth lens is convex or concave.

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

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

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

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

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

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

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

[0019] According to one exemplary embodiment of the present application, the fifth lens and the sixth lens are cemented to each other.

[0020] According to an example embodiment of the present application, the optical lens satisfies: 54°≤(FOVxF) / H≤65°; wherein FOV is the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view angle of the optical lens.

[0021] According to an example embodiment of the present application, the optical lens satisfies: 0.65≤(H / 2) / (Fxtan(θ / 2))≤0.95; wherein H is the image height corresponding to the maximum field of view 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 of view angle of the optical lens.

[0022] According to an example embodiment of the present application, the optical lens satisfies: 2.4≤F3 / F≤12; wherein F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens.

[0023] According to an example embodiment of the present application, the optical lens satisfies: 0.025≤D1 / H / TTLx1mm≤0.042; wherein 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, H is the image height corresponding to the maximum field of view angle of the optical lens, and TTL is the total optical length of the optical lens.

[0024] According to an example embodiment of the present application, the optical lens satisfies: -5° / mm≤FOV / R1≤6° / mm; wherein FOV is the maximum field of view angle of the optical lens, and R1 is the curvature radius of the first side of the first lens.

[0025] According to an example embodiment of the present application, the optical lens satisfies: 2.2≤|F56 / F|≤35; wherein F56 is the combined focal length of the fifth lens and the sixth lens, and F is the total effective focal length of the optical lens.

[0026] According to an example embodiment of the present application, the optical lens satisfies: 1.5≤F / ENPD≤1.85; wherein F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens.

[0027] According to an example embodiment of the present application, the optical lens satisfies: -10mm℃≤F4 / (dn / dt(4))≤-1.2mm℃; wherein F4 is the effective focal length of the fourth lens, and dn / dt(4) is the material refractive index temperature coefficient of the fourth lens.

[0028] According to an example embodiment of the present application, the optical lens satisfies: 0

[0029] According to an example embodiment of the present application, the optical lens satisfies: 1.35≤Dmax / Dmin≤1.85; wherein Dmax is the maximum aperture of the optical lens corresponding to the maximum field angle of the optical lens on the first side surface and the second side surface of all the lenses in the optical lens, and Dmin is the minimum aperture of the optical lens corresponding to the maximum field angle of the optical lens on the first side surface and the second side surface of all the lenses in the optical lens.

[0030] According to an example embodiment of the present application, the optical lens satisfies: 1.25≤CTmax / CTmin≤5.6; wherein CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, and CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis.

[0031] According to an example embodiment of the present application, the optical lens satisfies: 0.06≤d12 / TTL≤0.15; wherein d12 is the axial distance from the second side surface of the first lens to the first side surface of the second lens, and TTL is the total optical length of the optical lens.

[0032] According to an example embodiment of the present application, the optical lens satisfies: 3.2≤(F3+F4) / H≤5.7; wherein F3 is the effective focal length of the third lens, and F4 is the effective focal length of the fourth lens.

[0033] According to an example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.05≤TTL / H / FOV×1°≤0.065, 1≤F3 / F4≤6, 0.01≤Nd3 / Vd3≤0.15, 1 Nd4≤1.5, -3≤R1 / F≤5.5, -2.5≤(R1 / D1) / (R2 / D2)≤5, -3.6≤F1 / F≤-1, -3.7≤F2 / F≤12 and 0.4≤(R1+R2) / (R1-R2)≤4; wherein TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens, Nd4 is the refractive index of the fourth lens, R1 is the curvature radius of the first side surface of the first lens, F is the total effective focal length of the optical lens, D1 is the aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, R2 is the curvature radius of the second side surface of the first lens, D2 is the aperture of the second side surface of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens.

[0034] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.055≤TTL / H / FOVxl°≤0.06, 56°≤(FOVxF) / H≤62°, 4.2≤TTL / F≤4.85, 0.72≤F / H≤0.88, 0.78≤(H / 2) / (Fxtan(θ / 2))≤0.9, 2.45≤F3 / F≤4.21, 1.15≤F3 / F4≤2.6, 1.3≤F4 / F≤2.15, 0.03≤D1 / H / TTLxlmm≤0.04, 1.4° / mm≤FOV / R1≤5.8° / mm, 0.02≤Nd3 / Vd3≤0.12, 1.05≤Nd3 / Nd4≤1.3, 1.4≤R1 / F≤5.3, 1.15≤(R1 / D1) / (R2 / D2)≤4.75, -3.3≤F1 / F≤-1.65, -3.4≤F2 / F≤-1.2, 2.4≤|F56 / F|≤30, 0.03≤|F / F7|≤0.42, 1.6≤F / ENPD≤1.7, -12mm°C≤F4 / (dn / dt(4))≤20mm°C, 0.004≤d34 / F4≤0.07, 1.4≤Dmax / Dmin≤1.8, 1.3≤CTmax / CTmin≤5.5, 0.07≤d12 / TTL≤0.14, 3.4≤(F3+F4) / H≤5.2, and 1.25≤(R1+R2) / (R1-R2)≤3.85; wherein, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, 0 is the radian value of the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, D1 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, 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, D2 is the clear aperture on the second side of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, ENPD is the entrance pupil diameter of the optical lens, dn / dt(4) is the material refractive index temperature coefficient of the fourth lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, Dmax is the maximum clear aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, Dmin is the minimum clear aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, d12 is the axial distance from the second side of the first lens to the first side of the second lens.

[0035] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.044TTL / H / FOVxl°0.058, 58.657°(FOVxF) / H60.492°, 4.565TTL / F4.743, 0.756F / H0.869, 0.788(H / 2) / (Fxtan(0 / 2))0.855, 2.495F3 / F4.034, 1.33F3 / F42.5, 1.519F4 / F2.114, 0.033D1 / H / TTLxlmm0.039, 1.66° / mmFOV / R1 5.537° / mm, 0.031Nd3 / Vd30.092, 1.06Nd3 / Nd41.208, 1.593R1 / F5.276, 1.354(R1 / D1) / (R2 / D2)4.419, -3.19F1 / F-1.89, -3.007F2 / F-1.35, 2.602|F56 / F|25.261, 0.05|F / F7|0.397, 1.64F / ENPD1.68, -8.26mm°C F4 / (dn / dt(4))-1.843mm°C, 0.006d34 / F40.067, 1.432Dmax / Dmin1.77, 1.355CTmax / CTmin5.467, 0.076d12 / TTL0.136, 3.665(F3+F4) / H5.04, and 1.407(R1+R2) / (R1-R2)3.545; wherein, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, theta is the radian value of the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, D1 is the clear aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, 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, D2 is the clear aperture on the second side of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, ENPD is the entrance pupil diameter of the optical lens, dn / dt(4) is the material refractive index temperature coefficient of the fourth lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, Dmax is the maximum clear aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, Dmin is the minimum clear aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, d12 is the axial distance from the second side of the first lens to the first side of the second lens.

[0036] The second aspect of the present application provides an electronic device comprising the optical lens in the above example embodiments, and at least one of an imaging element and a light source, wherein the imaging element is configured to convert optical images or optical information formed by the optical lens into electrical signals, 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.

[0037] 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 optical power, 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 fourth lens having positive optical power, a first side of the fourth lens being convex; a fifth lens having optical power, a first side of the fifth lens being convex; a sixth lens having optical power, a sign of the optical power of the sixth lens being opposite to that of the fifth lens; and a seventh lens having optical power; wherein a number of lenses having optical power in the optical lens is seven; the optical lens satisfies: 0.7≤F / H≤0.92 and -5° / mm≤FOV / R1≤6° / mm; wherein F is a total effective focal length of the optical lens, H is an image height corresponding to a maximum field of view angle of the optical lens, FOV is the maximum field of view angle of the optical lens, and R1 is a radius of curvature of the first side of the first lens.

[0038] In this way, the optical lens of the present application adopts seven 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, and the second side surface thereof is a concave surface, which can not only diverge the light, but also ensure that the light exiting from the second side surface of the first lens can provide a larger light receiving surface for the subsequent optical system under the same field of view angle condition, and rapidly diverge the large-angle light exiting from the second side surface of the first lens, which is beneficial to the correction of the aberration of the large-angle light by the rear optical system, and realizes high resolution. The diverged light exiting from the first lens enters the second lens: the first side surface of the second lens is a concave surface, which can diverge the light, is beneficial to the acceptance of the light diverged from the second side surface of the first lens, and makes the light exit gently, which is beneficial to the improvement of the field curvature and other axial aberrations; the second side surface of the second lens is a convex surface, which can reduce the incident height of the large-angle light, and further reduce the rear end aperture of the lens, which is beneficial to the miniaturization of the lens. The light exiting from the second lens enters the third lens: the third lens has positive optical power, which can converge the front light, is beneficial to the smooth entry of more light into the rear optical system, improves the light quantity, converges the diverged light in front, and improves the imaging quality. The light exiting from the third lens enters the fourth lens: the fourth lens has positive optical power, and the first side surface thereof is a convex surface, which can converge the front light and reduce the rear end aperture. The light exiting from the fourth lens enters the fifth lens and the sixth lens: the fifth lens and the sixth lens have opposite optical power, and the first side surface of the fifth lens is a convex surface, so that the light can gently transition to the imaging surface after passing through the fifth lens and the sixth lens, which reduces the total optical length and realizes high resolution. The light exiting from the sixth lens enters the seventh lens to reach the image plane. In addition, the present application not only controls the ratio between the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens, i.e. 0.7≤F / H≤0.92, reasonably controls the total effective focal length and the image height of the optical lens, and can realize high resolution; but also controls the ratio between the maximum field of view angle FOV of the optical lens and the curvature radius R1 of the first side surface of the first lens, i.e. -5° / mm≤FOV / R1≤6° / mm, reasonably controls the curvature radius of the first side surface of the first lens, can balance the small aperture at the front end of the lens while collecting more angle light, and takes into account high illumination. BRIEF DESCRIPTION OF DRAWINGS

[0039] Other characteristics, 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 attached drawings. In the drawings:

[0040] Figure 1 FIG. 1 shows a structure schematic diagram of an optical lens according to Embodiment 1 of the present application;

[0041] Figure 2 FIG. 2 shows a structure schematic diagram of an optical lens according to Embodiment 2 of the present application;

[0042] Figure 3 A structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0043] Figure 4 A structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0044] Figure 5 A structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0045] Figure 6 A modulation transfer function (MTF) diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0046] Figure 7 A distortion diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0047] Figure 8 A relative illumination diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0048] Figure 9 A structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0049] Figure 10 A structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0050] Figure 11 A structural diagram of an optical lens according to Embodiment 8 of the present application is shown;

[0051] Figure 12 A structural diagram of an optical lens according to Embodiment 9 of the present application is shown;

[0052] Figure 13 A structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0053] Figure 14 A structural diagram of an optical lens according to Embodiment 11 of the present application is shown;

[0054] Figure 15 A structural diagram of an optical lens according to Embodiment 12 of the present application is shown;

[0055] Figure 16 A structural diagram of an optical lens according to Embodiment 13 of the present application is shown;

[0056] Figure 17A structural diagram of an optical lens according to Embodiment 14 of the present application is shown.

[0057] Figure 18 A structural diagram of an optical lens according to Embodiment 15 of the present application is shown. DETAILED DESCRIPTION

[0058] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be noted that these detailed descriptions are merely descriptive of exemplary embodiments of the present application and are not intended in any way to limit the scope of the present application. Throughout the specification, like reference numerals will refer to like elements.

[0059] It should be noted that the terms first, second, third, etc. in the present specification are merely used 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.

[0060] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or the aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0061] In this context, 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.

[0062] It should also be understood that the terms "comprises", "comprising", and / or "having", when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, when describing the embodiments of the present application, the use of "may" indicates that one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

[0063] 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.

[0064] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0065] The features, principles, and other aspects of the present application are described in detail below.

[0066] The optical lens according to the exemplary embodiments of the present application can include, for example, five lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged in order from a first side to a second side along an optical axis.

[0067] In exemplary embodiments, the optical lens provided by the present application can be used as a light receiving lens or a light emitting lens. The light receiving lens is generally used to collect light from the object side space, and the collected light is used to form detection information, including but not limited to imaging, laser point cloud, etc. The light emitting lens is generally used to transmit light from a light emitting unit to the object side space. According to the role of the light, the light transmitted to the object side space can be divided into projection light for forming a projection image or detection light for detecting target object information, etc.

[0068] It can be understood that when the optical lens provided by the present application is used as a light receiving lens such as a camera lens, a laser radar receiving end lens, a microscope lens, or a telescope lens, the "first side" referred to herein can refer to the object side, and the "second side" can refer to the image side (e.g., the side where the photosensor or the retina is located), i.e., the 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 the object side, and the "second side" can refer to the light source side.

[0069] In some possible embodiments, the optical lens provided in the present application can also simultaneously undertake the light receiving function and the light emitting function. For example, the optical lens is used in a laser radar system sharing a light receiving path and a light emitting path, and the optical lens simultaneously undertakes the functions of emitting laser and receiving a radar echo light beam. For another example, the optical lens is used in an optical communication and radar integrated system, and the optical lens simultaneously undertakes the functions of emitting a modulated light signal and receiving a radar echo light beam.

[0070] In an example embodiment, the first lens can have a negative focal power, and a first side thereof can be a convex surface or a concave surface, and a second side thereof can be a concave surface.

[0071] In a first example, the first lens can have a negative focal power, and a first side thereof can be a convex surface, and a second side thereof can be a concave surface. The first lens is a negative lens, and has a diverging effect on light rays, so that the light rays exiting from the second side of the first lens can enable a subsequent optical system to have a larger light receiving surface under the condition of the same field of view angle. The first side of the first lens is provided as a convex surface, so as to collect as much light rays as possible in a large field of view into the rear optical system, and in an actual application scenario (such as a rainy or snowy weather), the water droplets can slide down, and the influence on the imaging quality is reduced. The second side of the first lens is provided as a concave surface, so that the large-angle light rays from the first side of the first lens are rapidly diverged, and this is beneficial to the aberration correction of the large-angle light rays by the rear optical system, and high resolution is achieved.

[0072] In a second example, the first lens can have a negative focal power, and a first side thereof can be a concave surface, and a second side thereof can be a concave surface. The first lens is a negative lens, and the first side is a concave surface, so as to collect as much light rays as possible in a large field of view into the rear optical system under the premise of a small aperture, and this is beneficial to a higher light throughput.

[0073] In an example embodiment, the second lens can have a positive focal power or a negative focal power, and a first side thereof can be a concave surface, and a second side thereof can be a convex surface.

[0074] In a first example, the second lens can have a negative focal power, and a first side thereof can be a concave surface, and a second side thereof can be a convex surface. The second lens is a negative lens, and can further diverge the light rays diverged by the first lens, which is beneficial to the smooth transition of the light rays and improves the resolution of the optical lens. The first side of the second lens is provided as a concave surface, so as to diverge the light rays, which is beneficial to receiving the light rays diverged by the second side of the first lens, and can make the light rays exit smoothly, which is beneficial to improving the field curvature and other axial external aberrations. The second side of the second lens is provided as a convex surface, which can reduce the incident height of the large-angle light rays, and further reduce the rear end aperture of the optical lens, which is beneficial to realizing the miniaturization of the lens.

[0075] In the second example, the second lens can have positive focal power, and 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, and can moderately compress the light rays diverged by the first lens, which is conducive to reducing the rear aperture.

[0076] In the exemplary embodiments, the third lens can have positive focal power, and the first side surface thereof can be convex or concave, for example, and the second side surface thereof can be convex or concave, for example.

[0077] In the first example, the third lens can have positive focal power, and the first side surface thereof can be convex, for example, and the second side surface thereof can be convex, for example. The third lens is a positive lens, and the first side surface thereof is arranged to be convex, which can further reduce aberration and improve imaging quality. The second side surface of the third lens is arranged to be convex, so that the marginal field light rays have a tendency to move towards the optical axis after passing through the second side surface of the third lens, thereby avoiding excessive deflection of the light rays and reducing the sensitivity of the system.

[0078] In the second example, the third lens can have positive focal power, and the first side surface thereof can be convex, for example, and the second side surface thereof can be concave, for example. The third lens is a positive lens, and the second side surface thereof is arranged to be concave, so that the light rays can be smoothly transferred to the fourth lens, which is conducive to stabilizing the light ray trend of the rear lens.

[0079] In the third example, the third lens can have positive focal power, and the first side surface thereof can be concave, for example, and the second side surface thereof can be convex, for example. The third lens is a positive lens, so that the incident light rays converge, which is conducive to more light rays entering the optical system, improving the light flux, converging the divergent light rays in front, and improving the imaging quality. The first side surface of the third lens is arranged to be concave, which is conducive to better receiving the light rays diverged by the second lens and providing sufficient space for aberration adjustment of the rear light rays. The second side surface of the third lens is arranged to be convex, which can increase the deflection angle of the light rays, further converge the light rays, and realize miniaturization of the rear end.

[0080] In the exemplary embodiments, the fourth lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex or concave.

[0081] In the first example, the fourth lens can have positive focal power, and the first side surface thereof can be convex, for example, and the second side surface thereof can be convex, for example. The fourth lens is a positive lens, and the first side surface thereof is arranged to be convex, which can converge the light rays and reduce the rear end aperture. By reasonably setting the focal power of the fourth lens, chromatic aberration can be further eliminated, and the imaging quality can be improved. The second side surface of the fourth lens is arranged to be convex, so that the marginal field light rays are further converged after passing through the second side surface of the fourth lens, which is conducive to reducing the system rear end aperture, reducing energy loss, and improving the imaging quality.

[0082] In the second example, the fourth lens can have positive refractive power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The fourth lens is a positive lens, and the first side surface thereof is arranged to be convex to collect the light rays entering the fourth lens, and the second side surface thereof is arranged to be concave to appropriately diverge the marginal light rays, which is beneficial to improve the etendue of the optical system.

[0083] In the exemplary embodiments, the fifth lens can have positive refractive power or negative refractive power; the first side surface of the fifth lens can be convex, and the second side surface thereof can be convex or concave.

[0084] In the first example, the fifth lens can have negative refractive power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The fifth lens is a negative lens, and has a diverging effect on the light rays. By controlling the focal length of the fifth lens, the aberration caused by the positive lens in front of the system can be effectively corrected. The first side surface of the fifth lens is arranged to be convex to reduce the incident angle of the marginal light rays, which is beneficial to suppress the off-axis aberration (such as field curvature and distortion). The second side surface of the fifth lens is arranged to be concave to make the light rays exit gently, thereby reducing the sensitivity.

[0085] In the second example, the fifth lens can have positive refractive power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The fifth lens is a positive lens, and has a converging effect on the light rays. By controlling the focal length of the fifth lens, the aberration of the system can be effectively corrected. The first side surface of the fifth lens is arranged to be convex to bear the main refractive power, and has a strong converging effect, which is beneficial to shorten the total length of the system. The second side surface of the fifth lens is arranged to be concave to slightly diverge the light rays, which is beneficial to balance the angle of the off-axis light rays and control the field curvature.

[0086] In the third example, the fifth lens can have positive refractive power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The fifth lens is a positive lens, and has a double-convex shape, which can converge the light rays on two sides successively, and is beneficial to improve the image quality while reducing the total optical length of the optical lens.

[0087] In the exemplary embodiments, the sixth lens can have positive refractive power or negative refractive power; however, the sign of the refractive power of the sixth lens is opposite to that of the fifth lens.

[0088] In the first example, the sixth lens can have positive refractive power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The sixth lens is a positive lens, and has a converging effect on the light rays. Meanwhile, the double-convex structure of the sixth lens can further deflect the light rays toward the optical axis, which is beneficial to reduce the rear aperture.

[0089] In the second example, the sixth lens can have negative optical power, the first side surface thereof can be convex, and the second side surface thereof can be concave. The sixth lens is a negative lens, which, in combination with the fifth lens having opposite optical power in front, can correct chromatic aberration and achieve good imaging effect in the visible light range. The first side surface of the sixth lens is convex, which can collect divergent light. The second side surface of the sixth lens is concave, which can diverge light, so that more light exits through the fifth lens and the sixth lens, thereby improving the illumination of the system.

[0090] In the third example, the sixth lens can have negative optical power, the first side surface thereof can be concave, and the second side surface thereof can be concave. The sixth lens is a negative lens, which can adjust the light trend collected by the fifth lens, so that the light is more reasonably collected and diverged to the rear lens, thereby reducing the field curvature between different fields of view. The first side surface of the sixth lens is concave, which can receive and diverge the light in front, so that the light in the edge field of view has a larger optical path than the light in the central field of view after passing through the sixth lens, thereby changing the light trend of the light in the edge field of view, which is beneficial to the correction of the aberration in the edge field of view by defocusing and the realization of high resolution.

[0091] In the fourth example, the sixth lens can have negative optical power, the first side surface thereof can be concave, and the second side surface thereof can be convex. The sixth lens is a negative lens, which has a diverging effect on light. By reasonably setting the optical power of the sixth lens, the aberration can be further reduced, and the imaging quality can be improved. The second side surface of the sixth lens is convex, which can converge light and adjust the height of the edge light on the image plane, which is beneficial to the improvement of the chief ray angle (CRA).

[0092] It is worth noting that the fifth lens and the sixth lens are bonded to form a bonded lens, which can smoothly transition the light exiting the fourth lens to the imaging plane, reduce the total length of the lens, and fully correct various aberrations of the optical system, so as to improve the resolution and optimize the optical performance such as distortion and CRA under the premise of compact structure. In addition, the optical lens of the present application can not only reduce the tolerance sensitivity such as tilt and eccentricity of independent lenses due to the assembly process, but also reduce the number of assembly processes by assembling the lenses.

[0093] It can be understood that the advantages of the double-cemented lens are as follows: the cemented lens can eliminate the influence of ghost images on the lens and ensure high resolution; the negative lens in the cemented lens adopts a high-refractive material, and the positive lens adopts a relatively low-refractive material, so that the light rays can be effectively and smoothly converged to the imaging plane, reducing the overall weight and cost; at the same time, the high and low refractive materials are matched, which is beneficial to the rapid transition of the front light rays, increases the aperture of the stop, improves the light quantity, and reduces the light energy loss caused by the reflection between the lenses; the cemented lens can reduce the air gap between the two lenses, so that the overall structure of the optical system is compact.

[0094] In an example embodiment, the seventh lens can have a positive focal power or a negative focal power.

[0095] In a first example, the seventh lens can have a negative focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The seventh lens is a negative lens, which is beneficial to light divergence, so that the angle of the light rays to the image plane meets the CRA requirement, and the resolution and illumination are improved, the image plane is increased, and the large-angle resolution at the edge is realized. The first side surface of the seventh lens is provided as a convex surface, which can converge the light rays, deflect the light rays to the center, and improve the imaging quality of the central field of view. The second side surface of the seventh lens is provided as a concave surface, which can further correct the system aberration, improve the image quality, and optimize the optical performance such as distortion and CRA.

[0096] In a second example, the seventh lens can have a negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be concave. The seventh lens is a negative lens, and the first side surface is provided as a concave surface, which can better receive the light rays emitted by the sixth lens and reduce light loss.

[0097] In a third example, the seventh lens can have a positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The seventh lens is a positive lens, and the shape is double-convex, the focal length is large, the light refraction ability is weak, the change of the light rays is small, and the light rays emitted by the cemented lens can be smoothly transitioned to the imaging plane. The aperture of the first side surface of the seventh lens is large, which is beneficial to realize small CRA. The second side surface of the seventh lens is provided as a convex surface, so that the light rays after the seventh lens have a downward convergence trend, which is beneficial to realize small CRA.

[0098] In an example embodiment, the optical lens can further include a stop, which can be disposed between the fourth lens and the fifth lens. By disposing the stop between the fourth lens and the fifth lens, the light rays entering the optical system can be effectively collected, the lens aperture at the front end and the rear end of the optical system is reduced, and the sensitivity of the optical lens during assembly is reduced. It should be understood that the stop disposed between the fourth lens and the fifth lens is only exemplary, and the present application does not specifically limit this, and the stop can also be disposed at other positions according to actual needs.

[0099] In exemplary embodiments, the optical lens can employ at least one aspheric lens. For example, the second lens and / or the seventh lens can be aspheric lenses, which are advantageous for correcting system aberration and improving resolution, especially for reducing large field aberration. It should be understood that the aspheric lens can also be implemented to mold the lens to achieve cost reduction without affecting temperature performance.

[0100] In exemplary embodiments, the second lens and / or the seventh lens can have at least one inflection point. With such a configuration, it is advantageous to balance the aberration of the central field and the edge field and improve the resolution.

[0101] In exemplary embodiments, the optical lens can further include a filter between the seventh lens and the image plane to filter light having different wavelengths. It should be understood that the optical lens can further include a protective glass between the filter and the image plane according to actual needs to prevent the internal elements (e.g., a chip) of the optical lens from being damaged.

[0102] In exemplary embodiments, the optical lens can further include a light sensing element disposed on the second side. Optionally, the light sensing element disposed on the second side can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0103] In exemplary embodiments, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens can satisfy: 0.05≤TTL / H / FOV×1°≤0.065. Preferably, 0.055≤TTL / H / FOV×1°≤0.06. Further, 0.044≤TTL / H / FOV×1°≤0.058. By controlling the relationship, a shorter total optical length can be obtained under the same imaging surface, which is advantageous for realizing lens miniaturization. It can be understood that each further range of the relationship disclosed in the present application (e.g., 0.055≤TTL / H / FOV×1°≤0.06, 0.044≤TTL / H / FOV×1°≤0.058) can achieve a more optimal effect and achieve higher imaging quality.

[0104] In exemplary embodiments, the total effective focal length F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens can satisfy: 54°≤(FOV×F) / H≤65°. Preferably, 56°≤(FOV×F) / H≤62°. Further, 58.657°≤(FOV×F) / H≤60.492°. By controlling the relationship, the maximum field angle, the total effective focal length, and the image height of the optical lens are controlled, so that the optical lens can simultaneously satisfy long focal length and large field angle, and has large angular resolution.

[0105] In exemplary embodiments, the total track length TTL of the optical lens and the total effective focal length F of the optical lens can satisfy: 4≤TTL / F≤5. Preferably, 4.2≤TTL / F≤4.85. Further, 4.565≤TTL / F≤4.743. By controlling the relationship, the ratio between the total track length and the total effective focal length of the optical lens can be reasonably controlled while the total effective focal length is unchanged, so that the optical lens realizes long-focus characteristics and effectively limits the lens length, which is conducive to miniaturization.

[0106] In exemplary embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.7≤F / H≤0.92. Preferably, 0.72≤F / H≤0.88. Further, 0.756≤F / H≤0.869. By controlling the relationship, the total effective focal length and the image height of the optical lens can be reasonably controlled, so that high resolution can be achieved.

[0107] In exemplary embodiments, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field angle of the optical lens can satisfy: 0.65≤(H / 2) / (F×tan(θ / 2))≤0.95. Preferably, 0.78≤(H / 2) / (F×tan(θ / 2))≤0.9. Further, 0.788≤(H / 2) / (F×tan(θ / 2))≤0.855. By controlling the relationship, the image height, the total effective focal length, and the radian value corresponding to the maximum field angle of the optical lens can be reasonably controlled, so that each field of view has a larger angular resolution, which is conducive to improving the overall imaging quality of the optical lens.

[0108] In exemplary embodiments, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 2.4≤F3 / F≤12. Preferably, after excluding the following embodiments 13 and 14, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 2.45≤F3 / F≤4.21. Further, 2.495≤F3 / F≤4.034. By controlling the relationship, the effective focal length of the third lens is controlled, so that the third lens can effectively converge the continuously diverging light rays in front; by controlling the ratio between the effective focal length of the third lens and the total effective focal length of the optical lens, the light deflection angle is small, which is conducive to reducing light sensitivity, while controlling the light quantity and improving imaging quality.

[0109] In the example embodiments, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens can satisfy: 1≤F3 / F4≤6. Preferably, after excluding the following embodiments 13 and 14, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens can satisfy: 1.15≤F3 / F4≤2.6. Further, 1.33≤F3 / F4≤2.5. By controlling the relationship, the effective focal length ratio of the third lens and the fourth lens is controlled, the focal length values of the third lens and the fourth lens are reasonably distributed, the chromatic aberration can be effectively corrected, and further, the imaging quality of the optical system can be better by matching the material dispersion characteristics.

[0110] In the example embodiments, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can satisfy: 1.2≤F4 / F≤2.2. Preferably, 1.3≤F4 / F≤2.15. Further, 1.519≤F4 / F≤2.114. By controlling the relationship, the focal length of the fourth lens is controlled to be positive and small, which is beneficial for effectively compressing the light rays in the fourth lens, making the light rays converge and deflect inward, which is beneficial for the subsequent light rays to reach the image plane as soon as possible, and compressing the aperture to realize the miniaturization of the optical lens. Further, the material of the fourth lens can be a high Abbe number material, and the low Abbe number material of the third lens is matched, which has a certain effect on chromatic aberration correction and thermal compensation, and is beneficial for good imaging effect in the visible light range.

[0111] In the example embodiments, the light passing aperture D1 on the first side 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 optical length TTL of the optical lens can satisfy: 0.025≤D1 / H / TTL×1mm≤0.042. Preferably, 0.03≤D1 / H / TTL×1mm≤0.04. Further, 0.033≤D1 / H / TTL×1mm≤0.039. By controlling the relationship, the relationship between the light passing aperture on the first side of the first lens, the image height, and the total optical length is reasonably controlled, which can provide the optical lens with the characteristics of large target surface and small aperture.

[0112] In the example embodiments, the maximum field of view angle FOV of the optical lens and the curvature radius R1 of the first side of the first lens can satisfy: -5° / mm≤FOV / R1≤6° / mm. Preferably, after excluding the following embodiments 13 and 14, the maximum field of view angle FOV of the optical lens and the curvature radius R1 of the first side of the first lens can satisfy: 1.4° / mm≤FOV / R1≤5.8° / mm. Further, 1.66° / mm≤FOV / R1≤5.537° / mm. By controlling the relationship, the curvature radius of the first side of the first lens is reasonably controlled, which can balance the small aperture at the front end of the lens while collecting more angles of light, and take into account high illumination.

[0113] In exemplary embodiments, the refractive index Nd3 of the third lens and the Abbe number Vd3 of the third lens can satisfy: 0.01≤Nd3 / Vd3≤0.15. Preferably, 0.02≤Nd3 / Vd3≤0.12. Further, 0.031≤Nd3 / Vd3≤0.092. By controlling the relationship, so that the third lens uses a low Abbe number material with strong chromatic aberration compensation capability, at least one PgF (relative partial dispersion) coefficient large material is needed to correct the secondary spectrum, that is, to correct the chromatic aberration of two or more wavelengths, and the high Abbe number material of the fourth lens is further used to correct the chromatic aberration, which is beneficial to improve the imaging quality of the optical lens.

[0114] In exemplary embodiments, the refractive index Nd3 of the third lens and the refractive index Nd4 of the fourth lens can satisfy: 1

[0115] 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: -3≤R1 / F≤5.5. Preferably, after excluding the following embodiments 13 and 14, 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: 1.4≤R1 / F≤5.3. Further, 1.593≤R1 / F≤5.276. By controlling the relationship, the curvature radius of the first side surface of the first lens can be controlled, which can make the pupil image of the ghost image far away from the focal plane, so that the ghost image light on the final image plane is relatively divergent, effectively reducing the relative energy value of the ghost image, and improving the quality of the lens imaging picture.

[0116] In the example embodiments, the radius of curvature R1 of the first side surface of the first lens and the clear aperture D1 corresponding to the maximum field angle of the optical lens and the radius of curvature R2 of the second side surface of the first lens and the clear aperture D2 corresponding to the maximum field angle of the optical lens can satisfy: -2.5≤(R1 / D1) / (R2 / D2)≤5. Preferably, after excluding the following embodiments 13 and 14, the radius of curvature R1 of the first side surface of the first lens and the clear aperture D1 corresponding to the maximum field angle of the optical lens and the radius of curvature R2 of the second side surface of the first lens and the clear aperture D2 corresponding to the maximum field angle of the optical lens can satisfy: 1.15≤(R1 / D1) / (R2 / D2)≤4.75. Further, 1.354≤(R1 / D1) / (R2 / D2)≤4.419. By controlling the relationship, the radius of curvature and the clear aperture of the two side surfaces of the first lens are reasonably controlled, so that the radius of curvature of the two side surfaces of the first lens set as a negative lens is small and the clear aperture of the two side surfaces is close, the divergence of light is reduced, the light is compressed, and the front end of the optical lens has a smaller aperture.

[0117] 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: -3.6≤F1 / F≤-1. Preferably, after excluding the following embodiments 13 and 14, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -3.3≤F1 / F≤-1.65. Further, -3.19≤F1 / F≤-1.89. 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 is beneficial to collect large field of view light into the optical system under a smaller aperture.

[0118] In the example embodiments, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: -3.7≤F2 / F≤12. Preferably, after excluding the following embodiments 13 and 14, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens can satisfy: -3.4≤F2 / F≤-1.2. Further, -3.007≤F2 / F≤-1.35. By controlling the relationship, the effective focal length of the second lens is large, which is beneficial to accept the rapidly diverging light in front, make the light further effectively diverge into the rear optical system, but not too much divergence to affect the rear aperture; at the same time, it is also beneficial to reduce the system sensitivity and improve the imaging quality.

[0119] In exemplary embodiments, the combined focal length F56 of the fifth lens and the sixth lens and the total effective focal length F of the optical lens can satisfy: 2.2≤|F56 / F|≤35. Preferably, 2.4≤|F56 / F|≤30. Further, after excluding the following embodiments 13 and 14, the combined focal length F56 of the fifth lens and the sixth lens and the total effective focal length F of the optical lens can satisfy: 2.602≤|F56 / F|≤25.261. By controlling the relationship, the absolute ratio of the combined focal length of the fifth lens and the sixth lens and the total effective focal length is reasonable, which can effectively control the light ray trend entering the cemented lens, reduce the aberration caused by the large-angle light ray entering the front end, and improve the resolving performance.

[0120] In exemplary embodiments, the total effective focal length F of the optical lens and the effective focal length F7 of the seventh lens can satisfy: 0<|F / F7|≤0.45. Preferably, 0.03≤|F / F7|≤0.42. Further, 0.05≤|F / F7|≤0.397. By controlling the relationship, the focal length of the seventh lens is larger, the light ray deflection is smaller, the imaging quality is improved, and the seventh lens is closer to the image plane, which can realize smaller back focus and optical total length, and realize large image surface.

[0121] In exemplary embodiments, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens can satisfy: 1.5≤F / ENPD≤1.85. Preferably, 1.6≤F / ENPD≤1.7. Further, 1.64≤F / ENPD≤1.68. By controlling the relationship, the entrance pupil diameter of the optical lens is reasonably controlled to be larger, which can realize small FNO (aperture number) of the optical lens, is conducive to increasing the light quantity and improving the relative luminance.

[0122] In the example embodiments, the effective focal length F4 of the fourth lens and the material refractive index temperature coefficient dn / dt(4) of the fourth lens can satisfy: -12 mm·℃ ≤ F4 / (dn / dt(4)) ≤ 20 mm·℃. Preferably, after excluding the following embodiments 3 and 4, the effective focal length F4 of the fourth lens and the material refractive index temperature coefficient dn / dt(4) of the fourth lens can satisfy: -10 mm·℃ ≤ F4 / (dn / dt(4)) ≤ -1.2 mm·℃. Further, -8.26 mm·℃ ≤ F4 / (dn / dt(4)) ≤ -1.843 mm·℃. By controlling this relationship, the focal length of the fourth lens is positive, and the special material coefficient can provide better temperature drift compensation space when the temperature changes, achieve temperature stability and high resolution; further, when the fourth lens has a negative relative refractive index temperature coefficient, the fourth lens can have better temperature stability. It can be understood that the material refractive index temperature coefficient dn / dt(4) of the fourth lens mentioned in the present application refers to the change amount of the material refractive index of the fourth lens with temperature change, and its unit is 10 -6 / ℃, and the temperature change range is usually between -40℃ and 105℃.

[0123] In the example embodiments, the axial distance d34 from the second side of the third lens to the first side of the fourth lens and the effective focal length F4 of the fourth lens can satisfy: 0 < d34 / F4 ≤ 0.085. Preferably, 0.004 ≤ d34 / F4 ≤ 0.07. Further, 0.006 ≤ d34 / F4 ≤ 0.067. By controlling this relationship, the air gap between the third lens and the fourth lens is small, which can make the light emitted by the third lens arranged as a positive lens be smoothly received by the fourth lens arranged as a positive lens, which is beneficial to reduce the total optical length and reduce the sensitivity.

[0124] In the example embodiments, the maximum light passing aperture Dmax on the first side and the second side of all lenses in the optical lens corresponding to the maximum field of view angle of the optical lens and the minimum light passing aperture Dmin on the first side and the second side of all lenses in the optical lens corresponding to the maximum field of view angle of the optical lens can satisfy: 1.35 ≤ Dmax / Dmin ≤ 1.85. Preferably, 1.4 ≤ Dmax / Dmin ≤ 1.8. Further, 1.432 ≤ Dmax / Dmin ≤ 1.77. By controlling this relationship, the effective light passing aperture of each lens in the optical lens is controlled, so that the size of the maximum light passing aperture and the minimum light passing aperture is close, which is beneficial to the small aperture of the whole system; at the same time, the height difference change between the lenses is not too large, which reduces the sensitivity.

[0125] In the exemplary embodiments, the maximum center thickness CTmax of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis and the minimum center thickness CTmin of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis can satisfy: 1.25≤CTmax / CTmin≤5.6. Preferably, 1.3≤CTmax / CTmin≤5.5. Further, 1.355≤CTmax / CTmin≤5.467. By controlling the relationship, the center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens in the optical lens is controlled, which can make the overall trend of the light rays diverging first and converging later stable, reduce the generation of aberration, and improve the resolution.

[0126] In the exemplary embodiments, the axial distance d12 from the second side surface of the first lens to the first side surface of the second lens and the total optical length TTL of the optical lens can satisfy: 0.06≤d12 / TTL≤0.15. Preferably, after excluding the following embodiments 13 and 14, the axial distance d12 from the second side surface of the first lens to the first side surface of the second lens and the total optical length TTL of the optical lens can satisfy: 0.07≤d12 / TTL≤0.14. Further, 0.076≤d12 / TTL≤0.136. By controlling the relationship, the air gap of the first lens and the second lens is moderately controlled, which can ensure miniaturization and make the light rays diverge well at a small aperture in front, and realize the height required for large target imaging.

[0127] In the exemplary embodiments, after excluding the following embodiments 13 and 14, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 3.2≤(F3+F4) / H≤5.7. Preferably, after excluding the following embodiment 15, the effective focal length F3 of the third lens, the effective focal length F4 of the fourth lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 3.4≤(F3+F4) / H≤5.2. Further, 3.665≤(F3+F4) / H≤5.04. By controlling the relationship, the sum of the focal lengths of the third lens and the fourth lens is controlled to be large, which is beneficial to guarantee the long-focus and large-target characteristics of the lens as a whole.

[0128] In the exemplary embodiments, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens can satisfy: 0.4≤(R1+R2) / (R1-R2)≤4. Preferably, after excluding the following embodiments 13 and 14, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens can satisfy: 1.25≤(R1+R2) / (R1-R2)≤3.85. Further, 1.407≤(R1+R2) / (R1-R2)≤3.545. By controlling the relationship, the radius of curvature of the two sides of the first lens is controlled, which can allow the first lens to collect and diverge large-angle light rays, and achieve high light throughput.

[0129] Notably, the present application can also be through the cooperation of the relationship 4≤TTL / F≤5, the relationship 1.2≤F4 / F≤2.2, the relationship 0<|F / F7|≤0.45, and the relationship 0.7≤F / H≤0.92, which can achieve high resolution while taking into account the long focal length and miniaturization of the optical lens.

[0130] In addition, the present application can also be through the cooperation of the relationship 0.7≤F / H≤0.92 and the relationship -5° / mm≤FOV / R1≤6° / mm, which can achieve high resolution while taking into account the small aperture of the optical lens.

[0131] The optical lens according to the above embodiments of the present application can use multiple lenses, for example, the seven lenses described above. By reasonably allocating the optical parameters of each lens, one or more advantages of small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focus, small distortion, small chief ray angle, high illumination, and processability of the optical lens are achieved, and can be well matched with various application end chips, such as vehicle-mounted chips, and can better suppress the dark corner phenomenon. The temperature performance of the optical lens is good, 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.

[0132] 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 the image source surface; dn / dt(4) is the material refractive index temperature coefficient of the fourth lens; 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.

[0133] 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.

[0134] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If desired, the optical lens may also include other numbers of lenses.

[0135] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units for the radius of curvature and thickness / distance in the basic parameters of the optical lens are mm.

[0136] Example 1

[0137] The following is for reference Figure 1 The optical lens according to Embodiment 1 of this application is described.

[0138] 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, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0139] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0140] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0141] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0142] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0143] The fifth lens L5 has negative optical power, and its first side surface S9 is convex and its second side surface is concave.

[0144] The sixth lens L6 has positive optical power, and its first side surface S10 is convex, and its second side surface S11 is convex.

[0145] The seventh lens L7 has negative optical power, with its first side surface S12 being convex and its second side surface S13 being concave.

[0146] The first side surface S12 and the second side surface S13 of the seventh lens L7 each have at least one inflection point.

[0147] An image plane IMA is provided on the second side of the optical lens. A filter IR is provided between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S14 and a second side surface S15. A protective glass CG is provided between the filter IR and the image plane IMA. The protective glass CG has a first side surface S16 and a second side surface S17. 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. Table 1 shows the basic parameters of the optical lens of Embodiment 1. It should be understood that the second side surface of the fifth lens L5 and the first side surface S10 of the sixth lens L6 have exactly the same surface shape parameters.

[0148] Table 1

[0149]

[0150] In Embodiment 1, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. The surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0151] ;

[0152] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical surfaces S3, S4, S12 and S13 in Example 1.

[0153] Table 2

[0154]

[0155] Testing revealed that the MTF peak value of the optical lens in Example 1 at a spatial frequency of 83 lp / mm (83 line pairs / mm) in the central field of view consistently exceeded 0.7. The optical lens in Example 1 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the relative illumination at the edges of the optical lens in Example 1 exceeded 0.75. Therefore, the optical lens provided in Example 1 exhibits good imaging quality and can achieve high resolution.

[0156] Example 2

[0157] The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example...Figure 2 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different.

[0158] Table 3 shows the basic parameters of the optical lens in Example 2.

[0159] Table 3

[0160]

[0161] In Embodiment 2, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 4 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Embodiment 2.

[0162] Table 4

[0163]

[0164] Testing revealed that the MTF peak value of the optical lens in Example 2 at a spatial frequency of 83 lp / mm (83 line pairs / mm) in the central field of view consistently exceeded 0.7. The optical lens in Example 2 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the relative illumination at the edges of the optical lens in Example 2 reached 0.75. Therefore, the optical lens provided in Example 2 exhibits good imaging quality and can achieve high resolution.

[0165] Example 3

[0166] The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S6 of the third lens L3 is concave; the fifth lens L5 has positive optical power; the sixth lens L6 has negative optical power and its second side surface S11 is concave; the seventh lens L7 has positive optical power and its second side surface S13 is convex; the second side surface S4 of the second lens L2 has at least one inflection point, and the second side surface S13 of the seventh lens L7 does not have an inflection point.

[0167] Table 5 shows the basic parameters of the optical lens of Example 3.

[0168] Table 5

[0169]

[0170] In Example 3, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 6 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Example 3.

[0171] Table 6

[0172]

[0173] Testing revealed that the MTF peak value of the optical lens in Example 3 at a spatial frequency of 83 lp / mm (83 line pairs / mm) in the central field of view consistently exceeded 0.7. The optical lens in Example 3 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the relative illumination at the edges of the optical lens in Example 3 reached 0.75. Therefore, the optical lens provided in Example 3 exhibits good imaging quality and can achieve high resolution.

[0174] Example 4

[0175] The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S6 of the third lens L3 is concave; the fifth lens L5 has positive optical power; the sixth lens L6 has negative optical power and its second side surface S11 is concave; the seventh lens L7 has positive optical power and its second side surface S13 is convex; the second side surface S4 of the second lens L2 has at least one inflection point, and the second side surface S13 of the seventh lens L7 does not have an inflection point.

[0176] Table 7 shows the basic parameters of the optical lens in Example 4.

[0177] Table 7

[0178]

[0179] In Example 4, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 8 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Example 4.

[0180] Table 8

[0181]

[0182] The MTF peak values of the central field of view of the optical lens of Example 4 can reach above 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter) after testing; the optical lens of Example 4 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; the relative luminance of the optical lens of Example 4 at the edge reaches 0.75. Therefore, the optical lens given in Example 4 has good imaging quality and can achieve high resolving power.

[0183] Example 5

[0184] The optical lens according to Example 5 of the present application is described below. Figure 5 As shown in FIG. 5, compared with Example 1, the main differences of the present embodiment are as follows: the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different; the second side S6 of the third lens L3 is a concave surface; the fifth lens L5 has positive focal power, and the second side is a convex surface; the sixth lens L6 has negative focal power, and the first side S10 is a concave surface, and the second side S11 is a concave surface; the second side S4 of the second lens L2 has at least one inflection point. Figure 5 Table 9 shows the basic parameter table of the optical lens of Example 5.

[0185] Table 9

[0186]

[0187] In Example 5, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are aspherical surfaces. Table 10 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 that can be used in Example 5.

[0188] Table 10

[0189]

[0190] As shown in FIG. 5, the MTF peak values of the central field of view of the optical lens of Example 5 can reach above 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); as shown in FIG. 6, the optical lens of Example 5 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; as shown in FIG. 7, the relative luminance of the optical lens of Example 5 at the edge reaches 0.75.

[0191] Figure 6 Figure 7 Figure 8 ​​​As shown, the relative illumination of the optical lens of embodiment 5 reaches 0.78 at the edge. Therefore, the optical lens given in embodiment 5 has better imaging quality and can achieve high resolving power.

[0192] Embodiment 6

[0193] The following refers to Figure 9 An optical lens according to embodiment 6 of the present application is described. As shown in Figure 9 Compared with embodiment 1, the main differences of the present embodiment are as follows: the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different; the second side S6 of the third lens L3 is concave; the fifth lens L5 has positive focal power and the second side is convex; the sixth lens L6 has negative focal power and the first side S10 is concave and the second side S11 is concave; and the second side S4 of the second lens L2 has at least one inflection point.

[0194] Table 11 shows the basic parameter table of the optical lens of embodiment 6.

[0195] Table 11

[0196]

[0197] In embodiment 6, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are aspherical. Table 12 gives the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 that can be used in embodiment 6.

[0198] Table 12

[0199]

[0200] It is tested that the MTF peak value of the central field of view of the optical lens of embodiment 6 can reach 0.85 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); the optical lens of embodiment 6 introduces distortion at the edge so that the central imaging area has higher resolution and the imaging quality of the central area is improved; and the relative illumination of the optical lens of embodiment 6 reaches 0.75 at the edge. Therefore, the optical lens given in embodiment 6 has better imaging quality and can achieve high resolving power.

[0201] Embodiment 7

[0202] The following refers to Figure 10 An optical lens according to embodiment 7 of the present application is described. As shown in Figure 10As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S5 of the third lens L3 is concave; the fifth lens L5 has positive optical power and the second side surface is convex; the sixth lens L6 has negative optical power and the first side surface S10 is concave and the second side surface S11 is concave.

[0203] Table 13 shows the basic parameters of the optical lens of Example 7.

[0204] Table 13

[0205]

[0206] In Example 7, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 14 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Example 7.

[0207] Table 14

[0208]

[0209] Testing revealed that the optical lens of Example 7 achieved a peak MTF of 0.69 at a spatial frequency of 83 lp / mm (83 line pairs / mm). The optical lens of Example 7 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the relative illumination at the edges of the optical lens of Example 7 reached 0.75. Therefore, the optical lens provided in Example 7 exhibits good imaging quality and can achieve high resolution.

[0210] Example 8

[0211] The following is for reference Figure 11 Describes an optical lens according to Embodiment 8 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; the first side surface S5 of the third lens L3 is concave; the fifth lens L5 has positive optical power and the second side surface is convex; the sixth lens L6 has negative optical power and the first side surface S10 is concave and the second side surface S11 is concave.

[0212] Table 15 shows the basic parameters of the optical lens of Example 8.

[0213] Table 15

[0214]

[0215] In embodiment 8, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are all aspherical surfaces. Table 16 shows the conic coefficients k and the high order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 that can be used in embodiment 8.

[0216] Table 16

[0217]

[0218] It is tested that the MTF peak value of the central field of view of the optical lens of embodiment 8 can reach 0.67 at a spatial frequency of 83 lp / mm (83 lines per millimeter); the optical lens of embodiment 8 introduces distortion at the edge so that the central imaging area has higher resolution, which improves the imaging quality of the central area; the relative luminance of the optical lens of embodiment 8 at the edge reaches 0.75. Therefore, the optical lens given in embodiment 8 has good imaging quality and can realize high resolving power.

[0219] Embodiment 9

[0220] The following refers to Figure 12 An optical lens according to embodiment 9 of the present application is described. As shown in Figure 12 compared with embodiment 1, the main differences are that the radii of curvature, the thicknesses of the lenses and other optical parameters of the surfaces of the lenses are different; the second side S8 of the fourth lens L4 is a concave surface; the fifth lens L5 has positive focal power and the second side is a convex surface; the sixth lens L6 has negative focal power and the first side S10 is a concave surface; the first side S12 of the seventh lens L7 is a concave surface and the first side S12 of the seventh lens L7 does not have an inflection point. In addition, no protection glass CG is arranged between the filter IR and the image plane IMA.

[0221] Table 17 shows the basic parameter table of the optical lens of embodiment 9.

[0222] Table 17

[0223]

[0224] In embodiment 9, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are all aspherical surfaces. Table 18 shows the conic coefficients k and the high order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 that can be used in embodiment 9.

[0225] Table 18

[0226]

[0227] The MTF peak value of the central field of view of the optical lens of Example 9 can reach 0.85 at a spatial frequency of 83 lp / mm (83 lines per millimeter); the optical lens of Example 9 introduces distortion at the edge, so that the central imaging area has higher resolution, thereby improving the imaging quality of the central area; and the relative luminance of the optical lens of Example 9 at the edge reaches 0.75. Therefore, the optical lens given in Example 9 has good imaging quality and can achieve high resolving power.

[0228] Example 10

[0229] The optical lens according to Example 10 of the present application is described below. Figure 13 As shown in FIG. 10, the main differences between the present embodiment and Example 1 are as follows: the optical parameters such as the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different; the second side S8 of the fourth lens L4 is a concave surface; the fifth lens L5 has positive focal power, and the second side is a convex surface; the sixth lens L6 has negative focal power, and the first side S10 is a concave surface; the first side S12 of the seventh lens L7 is a concave surface, and the first side S12 of the seventh lens L7 does not have a turning point. In addition, no protective glass CG is arranged between the filter IR and the image plane IMA. Figure 13

[0230] Table 19 shows the basic parameter table of the optical lens of Example 10.

[0231] Table 19

[0232]

[0233] In Example 10, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are aspherical surfaces. Table 20 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces S3, S4, S12, and S13 that can be used in Example 10.

[0234] Table 20

[0235]

[0236] ​Testing revealed that the optical lens of Example 10 achieved a peak MTF of 0.7 at a spatial frequency of 83 lp / mm (83 line pairs / mm). The optical lens of Example 10 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the optical lens of Example 10 achieved a relative illumination of 0.75 at the edges. Therefore, the optical lens of Example 10 exhibits good imaging quality and can achieve high resolution.

[0237] Example 11

[0238] The following is for reference Figure 14 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 14 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S6 of the third lens L3 is concave; the fifth lens L5 has positive optical power and its second side surface is convex; the sixth lens L6 has negative optical power and its first side surface S10 is concave and its second side surface S11 is concave; the second side surface S4 of the second lens L2 has at least one inflection point.

[0239] Table 21 shows the basic parameters of the optical lens of Example 11.

[0240] Table 21

[0241]

[0242] In Example 11, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 22 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Example 11.

[0243] Table 22

[0244]

[0245] Testing revealed that the optical lens of Example 11 achieved a peak MTF of 0.8 at a spatial frequency of 83 lp / mm (83 line pairs / mm). The optical lens of Example 11 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the optical lens of Example 11 achieved a relative illumination of 0.75 at the edges. Therefore, the optical lens of Example 11 exhibits good imaging quality and can achieve high resolution.

[0246] Example 12

[0247] The following refers to Figure 15 An optical lens according to Embodiment 12 of the present application is described. As shown in Figure 15 The main differences between this embodiment and Embodiment 1 are: the optical parameters of the radii of curvature of the surfaces of the lenses, the thicknesses of the lenses, etc. are different; the second side S6 of the third lens L3 is concave; the fifth lens L5 has positive focal power, and the second side is convex; the sixth lens L6 has negative focal power, and the first side S10 is concave, and the second side S11 is concave; and the second side S4 of the second lens L2 has at least one inflection point.

[0248] Table 23 shows the basic parameter table of the optical lens of Embodiment 12.

[0249] Table 23

[0250]

[0251] In Embodiment 12, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are aspherical surfaces. Table 24 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 that can be used in Embodiment 12.

[0252] Table 24

[0253]

[0254] It has been tested that the MTF peak value of the central field of view of the optical lens of Embodiment 12 can reach 0.82 at a spatial frequency of 83 lp / mm (83 lines per millimeter); the optical lens of Embodiment 12 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; the relative luminance of the optical lens of Embodiment 12 at the edge reaches 0.75. Therefore, the optical lens given in Embodiment 12 has good imaging quality, and can realize high resolving power.

[0255] Embodiment 13

[0256] The following refers to Figure 16 An optical lens according to Embodiment 13 of the present application is described. As shown in Figure 16As shown, the main difference between the present embodiment and embodiment 1 is that the radius of curvature, lens thickness and other optical parameters of each lens surface are different; the first side S1 of the first lens L1 is concave; the second lens L2 has positive refractive power; the second side S6 of the third lens L3 is concave; the fifth lens L5 has positive refractive power and the second side is convex; the sixth lens L6 has negative refractive power and the first side S10 is concave and the second side S11 is concave; the second side S4 of the second lens L2 has at least one inflection point.

[0257] Table 25 shows the basic parameter table of the optical lens of embodiment 13.

[0258] Table 25

[0259]

[0260] In embodiment 13, the first side S3 and the second side S4 of the second lens L2 and the first side S12 and the second side S13 of the seventh lens L7 are all aspheric surfaces. Table 26 gives the conic coefficients k and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspheric surfaces S3, S4, S12 and S13 used in embodiment 13.

[0261] Table 26

[0262]

[0263] It is tested that the MTF peak value of the central field of view of the optical lens of embodiment 13 can reach 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); the optical lens of embodiment 13 introduces distortion at the edge so that the central imaging area has higher resolution and the imaging quality of the central area is improved; the relative luminance of the optical lens of embodiment 13 at the edge reaches 0.75. Therefore, the optical lens given in embodiment 13 has good imaging quality and can realize high resolving power.

[0264] Embodiment 14

[0265] The following refers to Figure 17 The optical lens according to embodiment 14 of the present application is described. As shown in Figure 17 As shown, the main difference between the present embodiment and embodiment 1 is that the radius of curvature, lens thickness and other optical parameters of each lens surface are different; the first side S1 of the first lens L1 is concave; the second lens L2 has positive refractive power; the second side S6 of the third lens L3 is concave; the fifth lens L5 has positive refractive power and the second side is convex; the sixth lens L6 has negative refractive power and the first side S10 is concave and the second side S11 is concave; the second side S4 of the second lens L2 has at least one inflection point.

[0266] Table 27 shows the basic parameters of the optical lens of Example 14.

[0267] Table 27

[0268]

[0269] In Example 14, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are both aspherical surfaces. Table 28 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S3, S4, S12 and S13 in Example 14.

[0270] Table 28

[0271]

[0272] Testing revealed that the optical lens of Example 14 achieved a peak MTF of 0.7 at a spatial frequency of 83 lp / mm (83 line pairs / mm). The optical lens of Example 14 introduced distortion at the edges, resulting in higher resolution in the central imaging area and improved image quality in the central region. Furthermore, the optical lens of Example 14 achieved a relative illumination of 0.75 at the edges. Therefore, the optical lens of Example 14 exhibits good imaging quality and can achieve high resolution.

[0273] Example 15

[0274] The following is for reference Figure 18 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 18 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 S6 of the third lens L3 is concave; the fifth lens L5 has positive optical power and its second side surface is convex; the sixth lens L6 has negative optical power and its first side surface S10 is concave and its second side surface S11 is concave; the second side surface S4 of the second lens L2 has at least one inflection point.

[0275] Table 29 shows the basic parameters of the optical lens of Example 15.

[0276] Table 29

[0277]

[0278] In Embodiment 15, the first side surface S3 and the second side surface S4 of the second lens L2 and the first side surface S12 and the second side surface S13 of the seventh lens L7 are aspherical surfaces. Table 30 gives the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces S3, S4, S12 and S13 used in Embodiment 15.

[0279] Table 30

[0280]

[0281] It is tested that the MTF peak value of the central field of view of the optical lens of Embodiment 15 can reach 0.7 at a spatial frequency of 83 lp / mm (83 line pairs per millimeter); the optical lens of Embodiment 15 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved; the relative luminance of the optical lens of Embodiment 15 at the edge reaches 0.75. Therefore, the optical lens given in Embodiment 15 has good imaging quality and can realize high resolving power.

[0282] Tables 31-1 to 31-3 give the basic parameters of the optical lenses in Embodiments 1 to 15, such as FNO, TTL, H, FOV, F, θ, F3, F4, R1, Nd3, Vd3, Nd4, R2, F1, F2, F56, F7, ENPD, dn / dt(4), d34, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, Dmax, Dmin, CTmax, CTmin and d12. The unit of the parameter FOV in the table is °, the parameter θ is the radian value corresponding to the parameter FOV, the parameters Nd3 and Vd3 are dimensionless quantities, the unit of the parameter dn / dt(4) is 10 -6 / ℃, and the units of other parameters are mm.

[0283] Table 31-1

[0284]

[0285] Table 31-2

[0286]

[0287] Table 31-3

[0288]

[0289] In summary, the relationships of each of Embodiments 1 to 15 satisfy the relationships shown in Tables 32-1 to 32-3.

[0290] Table 32-1

[0291]

[0292] Table 32-2

[0293]

[0294] Table 32-3

[0295]

[0296] 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 exemplary 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 at the second side of the optical lens, and light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area at the first side of the optical lens.

[0297] It is worth noting that the electronic device can be implemented as a lidar, a camera or a projection lamp, but is not limited thereto. Accordingly, the optical lens can be used as a light emitting lens or a light receiving lens. For example, when the electronic device is a camera, the electronic device can comprise the optical lens in the above exemplary embodiments and a photosensor configured to convert an optical image formed by the optical lens into an electrical signal, the photosensor being disposed at the second side of the optical lens, for example, on an imaging surface, and can be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). Light from the first side is imaged at the second side after passing through the optical lens.

[0298] When the electronic device is a projection lamp, the electronic device can comprise the optical lens in the above exemplary embodiments and a light source, the light source being located at the second side of the optical lens. Light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area at the first side.

[0299] In addition, when the electronic device is a lidar, the receiving end lens of the lidar can be implemented as the optical lens, the first side of the optical lens being an object side, and the second side of the optical lens being an image side.

[0300] 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.

[0301] It is worth mentioning that the application also provides a vehicle, which can include the above electronic device for obtaining information.

[0302] 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 involved in 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, comprises, in order along the optical axis from the first side to the second side: a first lens with negative refractive power, a second side of the first lens being concave; a second lens with refractive power, a first side of the second lens being concave, a second side of the second lens being convex; a third lens with positive refractive power; a fourth lens with positive refractive power, a first side of the fourth lens being convex; a fifth lens with refractive power, a first side of the fifth lens being convex; a sixth lens with refractive power, a sign of the refractive power of the sixth lens being opposite to that of the fifth lens; and a seventh lens with refractive power; wherein a number of lenses with refractive power in the optical lens is seven; the optical lens satisfies: 4≤TTL / F≤5, 1.2≤F4 / F≤2.2, 0<|F / F7|≤0.45, 0.7≤F / H≤0.92 and 54°≤(FOVxF) / H≤65°; wherein TTL is an overall optical length of the optical lens, F is a total effective focal length of the optical lens, F4 is an effective focal length of the fourth lens, F7 is an effective focal length of the seventh lens, H is an image height corresponding to a maximum field angle of the optical lens, and FOV is a maximum field angle of the optical lens.

2. The optical lens of claim 1, wherein, a first side of the first lens is convex or concave; the second lens has positive refractive power or negative refractive power; a first side of the third lens is convex, and a second side of the third lens is convex or concave, or a first side of the third lens is concave, and a second side of the third lens is convex; a second side of the fourth lens is convex or concave; the fifth lens has negative refractive power, a first side of the fifth lens is convex, and a second side of the fifth lens is concave, or the fifth lens has positive refractive power, a first side of the fifth lens is convex, and a second side of the fifth lens is convex or concave; the sixth lens has positive refractive power, a first side of the sixth lens is convex, and a second side of the sixth lens is convex, or the sixth lens has negative refractive power, a first side of the sixth lens is convex, and a second side of the sixth lens is concave, or the sixth lens has negative refractive power, a first side of the sixth lens is concave, and a second side of the sixth lens is convex or concave; the seventh lens has negative refractive power, a first side of the seventh lens is convex or concave, and a second side of the seventh lens is concave, or the seventh lens has positive refractive power, a first side of the seventh lens is convex, and a second side of the seventh lens is convex; and / or the fifth lens and the sixth lens are cemented to each other.

3. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: -3.6≤F1 / F≤-1; wherein F1 is an effective focal length of the first lens, and F is a total effective focal length of the optical lens.

4. The optical lens of claim 1 or claim 2, wherein, the optical lens satisfies: 2.4≤F3 / F≤12; wherein F3 is an effective focal length of the third lens, and F is a total effective focal length of the optical lens.

5. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0.025≤D1 / H / TTL*1mm≤0.042; Wherein, D1 is the first side of the first lens corresponding to the maximum field of view angle of the optical lens, H is the maximum field of view angle of the optical lens, TTL is the total optical length of the optical lens.

6. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: -5° / mm≤FOV / R1≤6° / mm; Wherein, FOV is the maximum field of view angle of the optical lens, R1 is the first side of the first lens.

7. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 2.2≤|F56 / F|≤35; Wherein, F56 is the combined focal length of the fifth lens and the sixth lens, F is the total effective focal length of the optical lens.

8. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0.65≤(H / 2) / (F*tan(θ / 2))≤0.95; Wherein, H is the maximum field of view angle of the optical lens, F is the total effective focal length of the optical lens, θ is the radian value of the maximum field of view angle of the optical lens.

9. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0<d34 / F4≤0.085; Wherein, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, F4 is the effective focal length of the fourth lens.

10. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 1.35≤Dmax / Dmin≤1.85; Wherein, Dmax is the maximum light aperture corresponding to the maximum field of view angle of the optical lens on the first side and the second side of all lenses in the optical lens, Dmin is the minimum light aperture corresponding to the maximum field of view angle of the optical lens on the first side and the second side of all lenses in the optical lens.

11. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 0.06≤d12 / TTL≤0.15; Wherein, d12 is the axial distance from the second side of the first lens to the first side of the second lens, TTL is the total optical length of the optical lens.

12. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies: 3.2≤(F3+F4) / H≤5.7; Wherein, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens.

13. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 0.05≤TTL / H / FOV*1°≤0.065, 1≤F3 / F4≤6, 0.01≤Nd3 / Vd3≤0.15, 1Nd3 / Nd4≤1.5, -3≤R1 / F≤5.5, -2.5≤(R1 / D1) / (R2 / D2)≤5, -3.7≤F2 / F≤12, 1.5≤F / ENPD≤1.85, -10mm*℃≤F4 / (dn / dt(4))≤-1.2mm*℃, 1.25≤CTmax / CTmin≤5.6 and 0.4≤(R1+R2) / (R1-R2)≤4; In the formula, TTL is an optical total track length of the optical lens, H is an image height corresponding to a maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F3 is an effective focal length of the third lens, F4 is an effective focal length of the fourth lens, Nd3 is a refractive index of the third lens, Vd3 is an Abbe number of the third lens, Nd4 is a refractive index of the fourth lens, R1 is a curvature radius of a first side surface of the first lens, F is a total effective focal length of the optical lens, D1 is a clear aperture on the first side surface of the first lens corresponding to the maximum field angle of the optical lens, R2 is a curvature radius of a second side surface of the first lens, D2 is a clear aperture on the second side surface of the first lens corresponding to the maximum field angle of the optical lens, F1 is an effective focal length of the first lens, F2 is an effective focal length of the second lens, dn / dt(4) is a material refractive index temperature coefficient of the fourth lens, CTmax is a maximum center thickness of the second lens, the third lens, the fourth lens, a fifth lens and a sixth lens on the optical axis, CTmin is a minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, and ENPD is an entrance pupil diameter of the optical lens.

14. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 0.055TTL / H / FOV*1°0.06, 56°(FOV*F) / H62°, 4.2TTL / F4.85, 0.72F / H0.88, 0.78(H / 2) / (F*tan(θ / 2))0.9, 2.45F3 / F4.21, 1.15F3 / F42.6, 1.3F4 / F2.15, 0.03D1 / H / TTL*1mm0.04, 1.4° / mmFOV / R1 5.8° / mm, 0.02Nd3 / Vd30.12, 1.05Nd3 / Nd41.3, 1.4R1 / F5.3, 1.15(R1 / D1) / (R2 / D2)4.75, -3.3F1 / F-1.65, -3.4F2 / F-1.2, 2.4|F56 / F|30, 0.03|F / F7|0.42, 1.6F / ENPD1.7, -12mm*℃F4 / (dn / dt(4))20mm*℃, 0.004d34 / F40.07, 1.4Dmax / Dmin1.8, 1.3CTmax / CTmin5.5, 0.07d12 / TTL0.14, 3.4(F3+F4) / H5.2, and 1.25(R1+R2) / (R1-R2)3.

85. In the formula, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, theta is the radian value of the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, D1 is the light passing aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, 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, D2 is the light passing aperture on the second side of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, ENPD is the entrance pupil diameter of the optical lens, dn / dt(4) is the material refractive index temperature coefficient of the fourth lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, Dmax is the maximum light passing aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, Dmin is the minimum light passing aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, d12 is the axial distance from the second side of the first lens to the first side of the second lens, Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens, and Nd4 is the refractive index of the fourth lens. In the formula, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, theta is the radian value of the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, D1 is the light passing aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, 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, D2 is the light passing aperture on the second side of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, ENPD is the entrance pupil diameter of the optical lens, dn / dt(4) is the material refractive index temperature coefficient of the fourth lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, Dmax is the maximum light passing aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, Dmin is the minimum light passing aperture on the first side and the second side of all the lenses in the optical lens corresponding to the maximum field angle of the optical lens, CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, d12 is the axial distance from the second side of the first lens to the first side of the second lens, Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens, and Nd4 is the refractive index of the fourth lens.

15. The optical lens of claim 1 or claim 2, wherein, The optical lens satisfies at least one of the following relationships: 0.044TTL / H / FOVxl°0.058, 58.657°(FOVxF) / H60.492°, 4.565TTL / F4.743, 0.756F / H0.869, 0.788(H / 2) / (Fxtan(9 / 2))0.855, 2.495F3 / F4.034, 1.33F3 / F42.5, 1.519F4 / F2.114, 0.033D1 / H / TTLxlmm0.039, 1.66° / mmFOV / R11.537° / mm, 0.031Nd3 / Vd30.092, 1.06Nd3 / Nd41.208, 1.593R1 / F5.276, 1.354(R1 / D1) / (R2 / D2)4.419, -3.19F1 / F-1.89, -3.007F2 / F-1.35, 2.602|F56 / F|25.261, 0.05|F / F7|0.397, 1.64F / ENPD1.68, -8.26mm°C F4 / (dn / dt(4)) -1.843mm°C, 0.006d34 / F40.067, 1.432Dmax / Dmin1.77, 1.355CTmax / CTmin5.467, 0.076d12 / TTL0.136, 3.665(F3+F4) / H5.04, and 1.407(R1+R2) / (R1-R2)3.

545. Wherein, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, θ is the radian value of the maximum field angle of the optical lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, D1 is the light passing aperture on the first side of the first lens corresponding to the maximum field angle of the optical lens, 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, D2 is the light passing aperture on the second side of the first lens corresponding to the maximum field angle of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F7 is the effective focal length of the seventh lens, ENPD is the entrance pupil diameter of the optical lens, dn / dt(4) is the material refractive index temperature coefficient of the fourth lens, d34 is the axial distance from the second side of the third lens to the first side of the fourth lens, Dmax is the maximum light passing aperture on the first side and the second side of all lenses in the optical lens corresponding to the maximum field angle of the optical lens, Dmin is the minimum light passing aperture on the first side and the second side of all lenses in the optical lens corresponding to the maximum field angle of the optical lens, CTmax is the maximum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, CTmin is the minimum center thickness of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis, d12 is the axial distance from the second side of the first lens to the first side of the second lens, Nd3 is the refractive index of the third lens, Vd3 is the Abbe number of the third lens, Nd4 is the refractive index of the fourth lens.

16. An electronic device, comprising: Comprise: The optical lens according to any one of claims 1 to 15; And At least one of an imaging element and a light source; Wherein, the imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; Wherein, the light source is located on the second side of the optical lens, the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and an image or an illumination area is formed on the first side of the optical lens.

Images