Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. The optical lens comprises, in order from a first side to a second side along an optical axis, a first lens with negative optical power, the second side of the first lens being a concave surface; a second lens with optical power; a third lens with optical power; a fourth lens with positive optical power, the first side of the fourth lens being a convex surface, and the second side being a convex surface; a fifth lens with optical power; a sixth lens with optical power, the sixth lens and the fifth lens being cemented to form a cemented lens, and the signs of the optical powers being opposite; a seventh lens with negative optical power, the second side of the seventh lens being a concave surface; and an eighth lens with optical power; wherein the number of lenses with optical power in the optical lens is eight; the optical lens satisfies: -1.85≤F1 / F≤-0.8, 0<|F / F2|≤0.35, 0.24≤D / TTL≤0.35, and 0<|F / F56|≤0.25.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the vigorous development of automobile auxiliary driving technology, vehicle-mounted lenses, as key components for obtaining external information of a vehicle in auxiliary driving systems such as a vehicle-mounted reversing visual system, a driving recorder, an automatic parking system, and a road navigation system, have also experienced rapid development. A vehicle-mounted lens refers to an optical lens installed on a vehicle to realize various functions. The vehicle-mounted lens may, for example, include an inside-view lens, a rear-view lens, a front-view lens, a side-view lens, and an all-around-view lens.

[0003] In order to more accurately obtain more information, the system needs to be matched with a larger and higher-resolution chip, so the vehicle-mounted lens usually needs to image a larger field of view, and the resolution requirement of the lens itself is also getting higher and higher. In addition, although the imaging requirements of the vehicle-mounted lens are met, the smaller the lens is, the more convenient it is to install the vehicle-mounted lens, but this will lead to a contradiction between the resolution of the ordinary vehicle-mounted lens and miniaturization, and it is impossible to meet the requirements of small front aperture and miniaturization at the same time. SUMMARY

[0004] 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 focal power, a second side of the first lens being concave; a second lens having a focal power; a third lens having a focal power; a fourth lens having a positive focal power, a first side of the fourth lens being convex, and a second side of the fourth lens being convex; a fifth lens having a focal power; a sixth lens having a focal power, the sixth lens and the fifth lens being cemented to form a cemented lens, a sign of the focal power of the sixth lens and the fifth lens being opposite in positive and negative attributes; a seventh lens having a negative focal power, a second side of the seventh lens being concave; and an eighth lens having a focal power; wherein the number of lenses having a focal power in the optical lens is eight; the optical lens satisfies -1.85≤F1 / F≤-0.8, 0<|F / F2|≤0.35, 0.24≤D / TTL≤0.35, and 0<|F / F56|≤0.25; wherein F1 is an effective focal length of the first lens, F is a total effective focal length of the optical lens, F2 is an effective focal length of the second lens, D is an entrance pupil diameter on the first side of the first lens corresponding to a maximum field of view angle of the optical lens; TTL is an optical total track length of the optical lens, and F56 is a combined focal length of the fifth lens and the sixth lens.

[0005] In this way, the optical lens of the present application adopts eight lenses with optical power, the first side light enters the first lens through the first side surface of the first lens and exits through the second side surface of the first lens: the second side surface of the first lens is a concave surface, which can quickly diverge the large-angle light from the first side surface of the first lens, is conducive to aberration correction of the large-angle light by the rear optical system, and realizes high resolution; at the same time, by controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens, i.e. -1.85≤F1 / F≤-0.8, the effective focal length of the first lens is controlled to be negative and small, which is conducive to collecting large field of view light under a small front aperture, so that the light can enter the rear optical system after being diverged by the first lens, and long focal length and large field of view imaging are realized. The divergent light exiting the first lens enters the second lens, and by controlling the absolute ratio of the total effective focal length of the optical lens to the effective focal length of the second lens, i.e. 0<|F / F2|≤0.35, the ratio of the total focal length to the effective focal length of the second lens is controlled to be small, which can make the light expand smoothly in the second lens, and is conducive to realizing a small aperture at the front end. The light exiting the second lens enters the third lens and the fourth lens: the fourth lens has positive optical power, the first side surface is a convex surface, and the second side surface is a convex surface, which can quickly converge the light that has a divergent trend in front of the whole, change the light trend, so that the light near the optical axis is the turning point of the light trend in the optical lens architecture, which is conducive to effectively converging the light and smoothly entering the rear optical system, reducing light energy loss, improving illumination, and reducing the rear end aperture, improving resolution quality. The light exiting the fourth lens enters the fifth lens and the sixth lens, the sixth lens is cemented with the fifth lens to form a cemented lens, and the fifth lens and the sixth lens have opposite signs of optical power, which can more effectively correct chromatic aberration and make the light transition to the rear system smoothly; at the same time, by controlling the absolute ratio of the total effective focal length of the optical lens to the combined focal length of the fifth lens and the sixth lens, i.e. 0<|F / F56|≤0.25, the combined focal length of the cemented lens is controlled, which can better accept the converging light in front, so that the light is smoothly transmitted to the seventh lens, ensuring that the light has a gently converging trend as a whole, so as to improve the imaging quality while reducing the rear end aperture. The light exiting the sixth lens enters the seventh lens and the eighth lens: the seventh lens has negative optical power, and the second side surface is set as a concave surface, which is conducive to smoothly diverging the light, reducing system sensitivity, and improving imaging quality. In addition, by controlling the ratio between the maximum light aperture on the first side surface of the first lens and the total optical length of the optical lens, i.e. 0.24≤D / TTL≤0.35, short TTL is realized on the basis of meeting the small front end aperture, and high resolution is considered.

[0006] According to an example embodiment of the present application, the first side surface of the first lens is a convex surface or a concave surface.

[0007] According to one exemplary embodiment of the present application, the second lens has a positive power, the first side surface of the second lens is convex, and the second side surface of the second lens is convex or concave.

[0008] According to one exemplary embodiment of the present application, the second lens has a positive power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex.

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

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

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

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

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

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

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

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

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

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

[0019] According to one exemplary embodiment of the present application, the first side surface of the seventh lens is convex or concave.

[0020] According to an example embodiment of the present application, the eighth lens has a negative focal power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave.

[0021] According to an example embodiment of the present application, the eighth lens has a negative focal power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is convex or concave.

[0022] According to an example embodiment of the present application, the eighth lens has a positive focal power, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is convex or concave.

[0023] According to an example embodiment of the present application, the second lens has a positive focal power, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is convex.

[0024] According to an example embodiment of the present application, the radius of curvature R41 of the first side surface of the fourth lens and the radius of curvature R42 of the second side surface of the fourth lens satisfy: -2.75≤R41 / R42≤-0.5.

[0025] According to an example embodiment of the present application, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: 1.1≤F4 / F≤4.4.

[0026] According to an example embodiment of the present application, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 50°≤(FOVxF) / H≤75°.

[0027] According to an example embodiment of the present application, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0.5≤F / H≤0.73.

[0028] According to an example embodiment of the present application, the total optical length TTL of the optical lens and the total effective focal length F of the optical lens satisfy: 4.0≤TTL / F≤5.6.

[0029] According to an example embodiment of the present application, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.5≤F / ENPD≤1.7.

[0030] According to an example embodiment of the present application, the on-axis distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens and the total optical length TTL of the optical lens satisfy: 0≤d56 / TTL≤0.002.

[0031] According to an example embodiment of the present application, a sum CT37 of central thicknesses of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis and an axial distance L37 from the first side surface of the third lens to the second side surface of the seventh lens satisfy: 0.85≤CT37 / L37≤0.99.

[0032] According to an example embodiment of the present application, an image height H corresponding to a maximum field angle of the optical lens, a total effective focal length F of the optical lens and an arc value θ of the maximum field angle of the optical lens satisfy: 0.58≤(H / 2) / (F×tan(θ / 2))≤0.75.

[0033] According to an example embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0

[0034] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.025≤|F7 / F8|≤2.8, -2.8≤F7 / F8≤-0.03, -24≤F7 / F≤-2.75, -2.5≤R41 / R42≤-0.55, 2≤R41 / F≤9, -5.7≤R42 / F≤-1.4, 0.65≤d8 / (d8+SAG82-SAG81)≤1.55, 0.27≤D / TTL≤0.34, 0.3≤D82 / TTL≤0.38, 0.025≤d78 / TTL≤0.068, 0.7≤|F5 / F6|≤1.4, -1.7≤F1 / F≤-0.9, 1.2≤F4 / F≤4, 0.005≤|F / F2|≤0.33, 0.007≤D / H / FOVx1°≤0.012, 0.001≤|F / F56|≤0.175, 55°≤(FOVxF) / H≤70°, 2.7≤TTL / H≤3.2, 0.055≤BFL / TL≤0.125, 3≤|R11 / F|≤65, 0.48≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤1.15, 0.55≤F / H≤0.68, 4.2≤TTL / F≤5.2, 1.55≤F / ENPD≤1.68, 0.85≤D82 / H≤1.15, 0≤d56 / TTL≤0.001, 0.86≤CT37 / L37≤0.985, 2.1≤|F8 / F|≤200, and 0.62≤(H / 2) / (Fxtan(θ / 2))≤0.7; wherein, F7 is an effective focal length of the seventh lens, F8 is an effective focal length of the eighth lens, F is a total effective focal length of the optical lens, R41 is a curvature radius of the first side surface of the fourth lens, R42 is a curvature radius of the second side surface of the fourth lens, d8 is a central thickness of the eighth lens on the optical axis, SAG82 is a sag of the second side surface of the eighth lens, SAG81 is a sag of the first side surface of the eighth lens, D is a clear aperture on the first side surface of the first lens corresponding to a maximum field angle of the optical lens, TTL is an optical total track length of the optical lens, D82 is a clear aperture on the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, d78 is an on-axis distance from the second side surface of the seventh lens to the first side surface of the eighth lens, F5 is an effective focal length of the fifth lens, F6 is an effective focal length of the sixth lens, F1 is an effective focal length of the first lens, F4 is an effective focal length of the fourth lens, F2 is an effective focal length of the second lens, H is an image height corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, F56 is a combined focal length of the fifth lens and the sixth lens, BFL is an optical back focal length of the optical lens, TL is an on-axis distance from the first side surface of the first lens to the second side surface of the eighth lens, R11 is a curvature radius of the first side surface of the first lens, F3 is an effective focal length of the third lens, ENPD is an entrance pupil diameter of the optical lens, d56 is an on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens, CT37 is a sum of central thicknesses of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis, L37 is an on-axis distance from the first side surface of the third lens to the second side surface of the seventh lens, and θ is a radian value of the maximum field angle of the optical lens.

[0035] According to one exemplary embodiment of the present application, the optical lens satisfies at least one of the following relationships: 0.065≤|F7 / F8|≤2.663, -2.663≤F7 / F8<-0.065, -21.226≤F7 / F≤-3.071, -2.364≤R41 / R42≤-0.688, 2.328≤R41 / F≤7.888, -4.991≤R42 / F≤-1.651, 0.761≤d8 / (d8+SAG82-SAG81)≤1.309, 0.299≤D / TTL≤0.332, 0.322≤D82 / TTL≤0.365, 0.027≤d78 / TTL≤0.063, 0.751≤|F5 / F6|≤1.227, -1.558≤F1 / F≤-1.027, 1.405≤F4 / F≤3.739, 0.019≤|F / F2|≤0.321, 0.009≤D / H / FOV x 1°≤0.010, 0.002≤|F / F56|≤0.114, 60.890°≤(FOVxF) / H≤64.267°, 2.875≤TTL / H≤2.958, 0.068≤BFL / TL≤0.113, 3.487≤|R11 / F|≤60.917, 0.504≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤0.992, 0.599≤F / H≤0.632, 4.681≤TTL / F≤4.867, 1.62≤F / ENPD≤1.64, 0.931≤D82 / H≤1.053, 0≤d56 / TTL≤0.0006, 0.866≤CT37 / L37≤0.982, 2.333≤|F8 / F|≤174.813, and 0.644≤(H / 2) / (F x tan(θ / 2))≤0.680; wherein, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F is the total effective focal length of the optical lens, R41 is the radius of curvature of the first side surface of the fourth lens, R42 is the radius of curvature of the second side surface of the fourth lens, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the sag of the second side surface of the eighth lens, SAG81 is the sag of the first side surface of the eighth lens, D is the clear aperture on the first side surface of the first lens corresponding to the maximum field angle of the optical lens, TTL is the total optical length of the optical lens, D82 is the clear aperture on the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, d78 is the on-axis distance from the second side surface of the seventh lens to the first side surface of the eighth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, and F1 is the effective focal length of the first lens. , F4 is the effective focal length of the fourth lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, F56 is the combined focal length of the fifth and sixth lenses, BFL is the optical back focus of the optical lens, TL is the on-axis distance from the first side surface of the first lens to the second side surface of the eighth lens, R11 is the radius of curvature of the first side surface of the first lens, F3 is the effective focal length of the third lens, ENPD is the entrance pupil diameter of the optical lens, d56 is the on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens, CT37 is the sum of the center thicknesses of the third, fourth, fifth, sixth, and seventh lenses on the optical axis, L37 is the on-axis distance from the first side surface of the third lens to the second side surface of the seventh lens, and θ is the radian value of the maximum field of view of the optical lens.

[0036] The second aspect of the present application provides an electronic device comprising the optical lens of the exemplary embodiment described above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, and the light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or 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 refractive power, a second side of the first lens being concave; a second lens having refractive power; a third lens having refractive power; a fourth lens having positive refractive power, a first side of the fourth lens being convex, a second side of the fourth lens being convex; a fifth lens having refractive power; a sixth lens having refractive power, a sign of the refractive power of the sixth lens being opposite to that of the fifth lens; a seventh lens having negative refractive power, a second side of the seventh lens being concave; and an eighth lens having refractive power; wherein a number of lenses having refractive power in the optical lens is eight; the optical lens satisfies: 1.1≤F4 / F≤4.4, -28≤F7 / F≤-2.5 and 0.85≤CT37 / L37≤0.99; wherein F4 is an effective focal length of the fourth lens, F is a total effective focal length of the optical lens, F7 is an effective focal length of the seventh lens, CT37 is a sum of central thicknesses of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis, and L37 is an on-axis distance from the first side of the third lens to the second side of the seventh lens.

[0038] In this way, the optical lens of the present application adopts eight lenses with optical power, the first side light enters the first lens through the first side surface of the first lens and exits through the second side surface of the first lens: the second side surface of the first lens is a concave surface, which can quickly diverge the large-angle light from the first side surface of the first lens, is conducive to aberration correction of the large-angle light by the rear optical system, and realizes high resolution. The divergent light exiting the first lens enters the second lens, the third lens and the fourth lens: the fourth lens has positive optical power, the first side surface thereof is a convex surface, and the second side surface thereof is a convex surface, which can quickly converge the light with a divergent trend in front, changes the light trend, and makes the light close to the optical axis, which is the light trend turning point of the optical lens architecture, is conducive to effective convergence of the light and smooth entry of the light into the rear optical system, reduces light energy loss, improves illumination, reduces the rear aperture, and improves resolution quality; meanwhile, the ratio of the effective focal length of the fourth lens to the total effective focal length of the optical lens is controlled, i.e. 1.1≤F4 / F≤4.4, which can effectively compress and converge the light with a divergent trend in front, reduce the rear aperture and the total optical length. The light exiting the fourth lens enters the fifth lens and the sixth lens, and the fifth lens and the sixth lens have opposite signs of optical power, which can smoothly transition the light to the rear system. The light exiting the sixth lens enters the seventh lens and the eighth lens: the seventh lens has negative optical power, and the second side surface thereof is arranged as a concave surface, which is conducive to smooth divergence of the light, reduces system sensitivity, and improves imaging quality; meanwhile, the ratio of the effective focal length of the seventh lens to the total effective focal length of the optical lens is controlled, i.e. -28≤F7 / F≤-2.5, which gently changes the convergence trend of the front light, regulates the optical path difference of each field of view, and is conducive to high resolution and small CRA of each field of view. In addition, by controlling the ratio between the sum of the central thicknesses of the third lens to the seventh lens on the optical axis and the axial distance from the first side surface of the third lens to the second side surface of the seventh lens, i.e. 0.85≤CT37 / L37≤0.99, the rear group of lenses (the third lens to the seventh lens) are arranged compactly, which is conducive to miniaturization, reduces the introduction of stray light, and improves resolution. BRIEF DESCRIPTION OF DRAWINGS

[0039] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings. In which:

[0040] Figure 1 A structural schematic diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0041] Figure 2 A modulation transfer function curve (MTF) of the optical lens according to Embodiment 1 of the present application is shown;

[0042] Figure 3A relative illumination curve of the optical lens according to Embodiment 1 of the present application is shown;

[0043] Figure 4 A distortion curve of the optical lens according to Embodiment 1 of the present application is shown;

[0044] Figure 5 A structure diagram of the optical lens according to Embodiment 2 of the present application is shown;

[0045] Figure 6 A modulation transfer function curve of the optical lens according to Embodiment 2 of the present application is shown;

[0046] Figure 7 A relative illumination curve of the optical lens according to Embodiment 1 of the present application is shown;

[0047] Figure 8 A distortion curve of the optical lens according to Embodiment 1 of the present application is shown;

[0048] Figure 9 A structure diagram of the optical lens according to Embodiment 3 of the present application is shown;

[0049] Figure 10 A structure diagram of the optical lens according to Embodiment 4 of the present application is shown;

[0050] Figure 11 A structure diagram of the optical lens according to Embodiment 5 of the present application is shown;

[0051] Figure 12 A structure diagram of the optical lens according to Embodiment 6 of the present application is shown;

[0052] Figure 13 A structure diagram of the optical lens according to Embodiment 7 of the present application is shown;

[0053] Figure 14 A structure diagram of the optical lens according to Embodiment 8 of the present application is shown;

[0054] Figure 15 A structure diagram of the optical lens according to Embodiment 9 of the present application is shown;

[0055] Figure 16 A structure diagram of the optical lens according to Embodiment 10 of the present application is shown;

[0056] Figure 17 A structure diagram of the optical lens according to Embodiment 11 of the present application is shown;

[0057] Figure 18 A structure diagram of the optical lens according to Embodiment 12 of the present application is shown;

[0058] Figure 19 A structural diagram of an optical lens according to Embodiment 13 of the present application is shown;

[0059] Figure 20 A structural diagram of an optical lens according to Embodiment 14 of the present application is shown;

[0060] Figure 21 A structural diagram of an optical lens according to Embodiment 15 of the present application is shown;

[0061] Figure 22 A structural diagram of an optical lens according to Embodiment 16 of the present application is shown;

[0062] Figure 23 A structural diagram of an optical lens according to Embodiment 17 of the present application is shown;

[0063] Figure 24 A structural diagram of an optical lens according to Embodiment 18 of the present application is shown;

[0064] Figure 25 A structural diagram of an optical lens according to Embodiment 19 of the present application is shown;

[0065] Figure 26 A structural diagram of an optical lens according to Embodiment 20 of the present application is shown;

[0066] Figure 27 A structural diagram of an optical lens according to Embodiment 21 of the present application is shown;

[0067] Figure 28 A structural diagram of an optical lens according to Embodiment 22 of the present application is shown;

[0068] Figure 29 A structural diagram of an optical lens according to Embodiment 23 of the present application is shown;

[0069] Figure 30 A structural diagram of an optical lens according to Embodiment 24 of the present application is shown;

[0070] Figure 31 A structural diagram of an optical lens according to Embodiment 25 of the present application is shown;

[0071] Figure 32 A structural diagram of an optical lens according to Embodiment 26 of the present application is shown;

[0072] Figure 33 A structural diagram of an optical lens according to Embodiment 27 of the present application is shown;

[0073] Figure 34 A structural diagram of an optical lens according to Embodiment 28 of the present application is shown;

[0074] Figure 35 A structural diagram of an optical lens according to Embodiment 29 of the present application is shown;

[0075] Figure 36 A structural diagram of an optical lens according to Embodiment 30 of the present application is shown;

[0076] Figure 37 A structural diagram of an optical lens according to Embodiment 31 of the present application is shown;

[0077] Figure 38 A structural diagram of an optical lens according to Embodiment 32 of the present application is shown;

[0078] Figure 39 A structural diagram of an optical lens according to Embodiment 33 of the present application is shown;

[0079] Figure 40 A structural diagram of an optical lens according to Embodiment 34 of the present application is shown. DETAILED DESCRIPTION

[0080] 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 understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements.

[0081] It is to be noted that the expressions first, second, third, etc. in the present specification are used only 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.

[0082] In the drawings, the thickness, size, and shape of lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of a spherical surface or an aspherical surface shown in the drawings is shown by way of example. That is, the shape of a spherical surface or an aspherical surface is not limited to the shape of a spherical surface or an aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0083] In the present specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is referred to as the first side surface of the lens, and the surface of each lens closest to the second side is referred to as the second side surface of the lens.

[0084] It should also be understood that the words "comprise," "comprising," "include," "including," and / or "has," "having" when used in this specification have the same meaning as the word "comprise" and / or "comprising" and are inclusive or open-ended and do not exclude additional non-enumerated features, elements, components, and / or steps.

[0085] 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.

[0086] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0087] The features, principles, and other aspects of the present application are described in detail below.

[0088] The optical lens according to the exemplary embodiments of the present application can include, for example, eight lenses with optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, which are arranged in order from a first side to a second side along an optical axis.

[0089] In the exemplary embodiments, the optical lens provided by the present application can be used as a light receiving lens or a light emitting lens. The light receiving lens is generally used to collect light from 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 used to form a projection image or detection light used to detect target object information, etc.

[0090] It can be understood that when the optical lens provided in the present application is used in a light receiving lens such as a camera lens, a laser radar receiving end lens, a microscope lens or a telescope lens, the "first side" referred to herein can refer to an object side, and the "second side" can refer to an image side (such as a side where a photosensor or a retina is located), that is, light from the object side can be imaged on the image side, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera and the like. When the optical lens provided in the present application is used in a light emitting lens such as a projection lens or a laser radar transmitting end lens, the "first side" referred to herein can refer to an object side, and the "second side" can refer to a light source side.

[0091] In some possible implementation manners, the optical lens provided in the present application can also simultaneously assume light receiving and light emitting functions. For example, the optical lens provided in the present application is used in a laser radar system sharing a light receiving and light emitting path, and the optical lens simultaneously assumes the functions of emitting laser and receiving a radar echo light beam. For another example, the optical lens provided in the present application is used in a system integrating optical communication and radar, and the optical lens simultaneously assumes the functions of emitting a modulated light signal and receiving a radar echo light beam.

[0092] In an example implementation manner, the first lens can have a negative optical power, and a first side thereof can be a convex surface or a concave surface; and a second side thereof is a concave surface.

[0093] In an example, the first lens can have a negative optical 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, which can collect large field of view light to diverge, so that the light emitted from the second side of the first lens can make the subsequent optical system 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, which can collect as much large field of view light as possible into the rear optical system, and is beneficial to the sliding of water droplets in actual application scenarios (such as rainy and snowy weather), thereby reducing the influence on the imaging quality. The second side of the first lens is provided as a concave surface, which makes the large-angle light from the first side of the first lens diverge rapidly, which is beneficial to the aberration correction of the large-angle light by the rear optical system, thereby realizing high resolution.

[0094] In another example, the first lens can have a negative optical power, and a first side thereof can be a concave surface, and a second side thereof can be a concave surface. The first side of the first lens is provided as a concave surface, which can receive peripheral light with a smaller aperture and diverge, which is beneficial to reducing the front aperture, rapidly expanding the light, reducing the incidence angle of the light of the rear lens, reducing the light sensitivity, and realizing long focal length and high resolution.

[0095] In an example implementation manner, the second lens can have a positive optical power or a negative optical power.

[0096] In the first example, the second lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be convex. The second lens is a positive lens, which can effectively compress the light rays diverged by the first lens, so that the light rays smoothly enter the rear optical system; the second lens with positive focal power is matched with the first lens with negative focal power, which is beneficial to better divergence of the light rays by the first lens, thereby reducing the front aperture. The shape of the second lens is biconvex, which can further converge the light rays, so that the light rays emitted by the second lens are closer to the optical axis, which is beneficial to reduce the front and rear apertures and realize the miniaturization of the lens.

[0097] In the second example, the second lens can have positive focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The first side surface of the second lens is set to be convex, which can further converge the light rays entering the second lens and reduce the front aperture; the second side surface of the second lens is set to be concave, which can accept the front convergent light rays for proper divergence, which is beneficial to increase the light flux and improve the illumination of the edge field of view.

[0098] In the third example, the second lens can have positive focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The first side surface of the second lens is set to be concave, which can be matched with the second side surface set to be concave in the first lens, which is beneficial to better acceptance of the front light rays by the second lens, so that the light rays are smoothly transitioned, the light ray sensitivity is reduced, the resolution quality is improved, the light energy loss is reduced, and the illumination of the peripheral field of view is improved. The second side surface of the second lens is set to be convex, which can further converge the light rays, reduce the incidence height of the large-angle light rays, and thereby reduce the rear aperture of the lens, thereby realizing the miniaturization of the lens.

[0099] In the fourth example, the second lens can have negative focal power, and the first side surface thereof can be concave, and the second side surface thereof can be convex. The second lens is a negative lens, and the first side surface thereof is set to be concave, which can further diverge the light rays and expand the light rays, so as to ensure that more light rays pass through the diaphragm and increase the light flux of the entire system; meanwhile, the second side surface set to be convex can make the light rays pass through the diaphragm more concentratedly, that is, the illumination difference between the edge field of view and the center field of view can be reduced.

[0100] In the fifth example, the second lens can have negative focal power, and the first side surface thereof can be convex, and the second side surface thereof can be concave. The second lens is a negative lens, and the first side surface thereof is set to be convex, which can further converge the light rays and compress the light rays, so as to avoid excessive divergence of the object-side light rays; meanwhile, the second side surface set to be concave can make the light rays smoothly transition, which is beneficial to control the aperture of the rear lens and facilitate the miniaturization design.

[0101] In the sixth example, the second lens can have a negative focal power, the first side surface thereof can be concave, and the second side surface thereof can be concave. The second lens is a negative lens and has a biconcave shape, has a diverging effect on light rays, can disperse central light rays and edge light rays of each field of view, expand the aperture of the stop, and increase the illumination of the system; meanwhile, the aberration correction of the edge light rays and the central light rays is facilitated, high resolution is achieved, and the light rays emitted through the second side surface of the second lens can make the subsequent optical system have a larger light receiving surface under the condition of the same field of view, the physical aperture of the stop can be expanded, the stop is enlarged, a larger amount of light is obtained, and the brightness of the image surface is further increased. The first side surface of the second lens is concave, which cooperates with the second side surface that is concave, so that the light rays emitted through the second lens are incident on the first side surface of the third lens gently, the light rays are gently transitioned, the loss of light energy is reduced, and the illumination of the peripheral field of view is improved; meanwhile, the trend of the edge light rays is changed, the aperture of the front end of the lens is reduced, the volume is reduced, and the miniaturization and cost reduction are facilitated.

[0102] In the exemplary embodiments, the third lens can have a positive focal power or a negative focal power.

[0103] In the first example, the third lens can have a positive focal power, the first side surface thereof can be convex, and the second side surface thereof can be convex. The third lens is a positive lens, has a converging effect on the incident light rays, and reduces the loss of light energy. The third lens has a biconvex shape, can converge light rays twice to change the trend of the edge light rays, effectively reduces the aperture of the front end of the lens, and further reduces the volume, facilitates the miniaturization of the lens, and reduces the cost.

[0104] In the second example, the third lens can have a positive focal power, the first side surface thereof can be convex, and the second side surface thereof can be concave. The third lens is a positive lens, and the second side surface is concave, which facilitates the light rays of the rear system to have a more gentle trend.

[0105] In the third example, the third lens can have a positive focal power, the first side surface thereof can be concave, and the second side surface thereof can be convex. The third lens is a positive lens, can share the converging pressure of the second lens, facilitates the reduction of light sensitivity, and improves the resolution quality; meanwhile, the second lens having a positive focal power can continuously converge light rays, and is more conducive to realizing a small aperture at the front end. The first side surface of the third lens is concave, can better receive light rays from the front, so that the incident angle of the light rays entering the third lens is small, facilitates the reduction of light energy loss, the reduction of light sensitivity, and the improvement of the resolution quality. The second side surface of the third lens is convex, and cooperates with the first side surface that is concave, so that the light rays can be emitted gently after passing through the third lens, which is conducive to improving the field curvature and other axial aberrations.

[0106] In a fourth example, the third lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The third lens is a negative lens, capable of diverging the light rays converged by the second lens, dispersing the central and edge rays of each field of view, which is beneficial for the rear lens to control the light and improve the image resolution quality. The first side surface of the third lens is set as a concave surface, which can better receive the front light, so that the incident angle of the light entering the third lens is smaller, which is beneficial for reducing light energy loss, reducing light sensitivity, and improving image resolution quality. The second side surface of the third lens is set as a convex surface, and in combination with the first side surface set as a concave surface, the light can be emitted smoothly after passing through the third lens, which is beneficial for improving field curvature and off-axis aberrations.

[0107] In the fifth example, the third lens element may have negative power, with its first side surface being convex and its second side surface being concave. The third lens element being a negative lens with a convex first side surface further converges and compresses light, preventing excessive divergence of light on the object side. Simultaneously, the concave second side surface provides a smooth transition of light, helping to control the aperture of the rear lens element and facilitating a compact design.

[0108] In an exemplary embodiment, the fourth lens may have positive optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. The fourth lens is a positive lens, which quickly converges the light that is generally diverging in the front, changes the light trajectory, and makes the light close to the optical axis. It is the turning point of the light trajectory of the optical key in this optical lens architecture, which is conducive to the effective convergence of light and its smooth entry into the rear optical system, reducing light energy loss, improving illumination, and at the same time reducing the rear port diameter and improving resolution quality. The first side surface of the fourth lens is set as a convex surface, which has a converging effect on light, can further reduce aberrations, is conducive to achieving high resolution, and improves the resolution ability of the optical system. The second side surface of the fourth lens is set as a convex surface, so that the edge field of view light continues to converge after passing through the fourth lens, which is conducive to reducing the rear port diameter and achieving miniaturization, while making the rear end light trajectory smooth, reducing light sensitivity, and improving resolution quality.

[0109] In example embodiments, the fifth lens may have positive or negative refractive power.

[0110] In the first example, the fifth lens element may have positive optical power, and its first and second side surfaces may be, for example, convex. The fifth lens element is a positive lens with a biconvex shape, which further smoothes the transition and converges forward light, resulting in minimal aberrations. This facilitates rear-end miniaturization and high resolution, thereby improving the resolving power of the optical system.

[0111] In the second example, the fifth lens can have a negative focal power, and its first side surface can be convex, and its second side surface can be concave. The fifth lens is a negative lens, and its shape is convex-concave, which can effectively receive the light rays converging in front, reduce the deflection degree of the light rays, facilitate smooth passing of the light rays, reduce the light energy loss at the interface, improve the relative luminance, and reduce the system sensitivity.

[0112] In the third example, the fifth lens can have a negative focal power, and its first side surface can be concave, and its second side surface can be concave. The fifth lens is a negative lens, and its shape is double-concave, which can appropriately diverge the light rays converging in front, pull apart the edge light rays, improve the peripheral luminance, and realize large-image-plane imaging.

[0113] In the exemplary embodiments, the sixth lens can have a positive focal power or a negative focal power, but the sixth lens and the fifth lens have opposite positive and negative attributes of the focal power, which can facilitate smooth transition of the light rays to the optical system in the rear.

[0114] In the first example, the sixth lens can have a negative focal power, and its first side surface can be concave, and its second side surface can be convex. The sixth lens is a negative lens, and its shape is concave-convex, which can appropriately diverge the light rays continuously converging through the fourth lens and the fifth lens, facilitate smooth exiting of the light rays, and improve aberration to realize high resolution.

[0115] In the second example, the sixth lens can have a negative focal power, and its first side surface can be concave, and its second side surface can be concave. The sixth lens is a negative lens, and its shape is double-concave, which can further diverge the light rays continuously converging through the fourth lens and the fifth lens, pull apart the edge light rays, improve the peripheral luminance, and realize large-image-plane imaging.

[0116] In the third example, the sixth lens can have a positive focal power, and its first side surface can be convex, and its second side surface can be convex. The sixth lens is a positive lens, and its shape is double-convex, which can appropriately converge the light rays smoothly passing in front, facilitate miniaturization and high resolution in the rear end, and improve the resolution capability of the optical system.

[0117] In the exemplary embodiments, the seventh lens can have a negative focal power, and its first side surface can be convex or concave, and its second side surface is concave.

[0118] In one example, the seventh lens can have negative focal power, the first side surface thereof can be convex, and the second side surface thereof can be concave. The seventh lens is a negative lens and has a convex-concave shape, which is beneficial to diverging light rays. The first side surface of the seventh lens is configured to be convex, which can lower the light rays that are raised after passing through the sixth lens and reduce the rear aperture. The second side surface of the seventh lens is configured to be concave, which, in combination with the first side surface configured to be convex, can make the light rays transition smoothly, reduce the sensitivity of the system, and improve the imaging quality. In addition, the seventh lens of the present application can be combined with the eighth lens having an aspherical surface at the rear, which is beneficial to further correcting aberration and also beneficial to reducing the chief ray angle (CRA).

[0119] In another example, the seventh lens can have negative focal power, 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 has a double-concave shape, which is beneficial to further smoothly diverging light rays and regulating the optical path of light rays in each field of view, thereby improving the imaging quality in each field of view. In addition, the seventh lens of the present application can be combined with the eighth lens having an aspherical surface at the rear, which is beneficial to further correcting aberration and also beneficial to achieving a small CRA.

[0120] It is worth noting that the light rays show a diverging trend after passing through the first lens and the second lens, are transferred to the fourth lens through the third lens, and are quickly converged by the fourth lens to achieve a turning of the trend of the light rays. At this time, a large optical path difference is introduced, which makes it difficult to completely eliminate chromatic dispersion. On one hand, the present application can make the light rays enter the fifth lens more smoothly when exiting the fourth lens by reasonably matching the focal power and surface shape of the first lens, the second lens, the third lens, and the fourth lens, and on the other hand, the sixth lens can be glued with the fifth lens to form a glued lens, which is more beneficial to correcting chromatic aberration. In addition, the seventh lens having negative focal power that is immediately arranged at the rear is more beneficial to fully correcting 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.

[0121] It should be understood that cementing the fifth and sixth lenses effectively eliminates the effects of ghosting, ensuring high resolution while eliminating ghosting. Furthermore, the use of cemented lenses fully corrects various aberrations in the optical system, improving resolution while maintaining a compact structure and optimizing optical properties such as distortion and CRA. Cemented lenses are negative lenses with a higher refractive index (relative to positive lenses), allowing light to converge effectively and smoothly at the end, ensuring a smooth arrival at the imaging surface and reducing overall weight and cost. Cemented lenses also reduce light loss caused by reflections between lenses. The combination of high and low refractive indices in cemented lenses facilitates rapid forward light transitions, increases the aperture, and improves light throughput. Cemented lenses reduce the air gap between the two lenses, making the overall optical system compact while also reducing tolerance sensitivity issues such as overall deflection that can occur during the lens unit assembly process.

[0122] In example embodiments, the eighth lens may have positive refractive power, or may have negative refractive power.

[0123] In a first example, the eighth lens element can have negative optical power. Its first side surface can be convex, and its second side surface can be concave. The eighth lens element is a negative lens element that diverges the light emitted by the seventh lens element, further adjusting the divergence of the forward light, increasing the illumination in the peripheral field of view, and improving image resolution. The convex first side surface of the eighth lens element reduces the incident angle of light, allowing more light to enter the optical system and achieve high throughput. It also helps the incident light transmitted from the forward optical system converge, quickly reaching the image plane, and facilitating a short total optical length (TTL). The concave second side surface of the eighth lens element diverges the central light, allowing it to reach a higher imaging position. Combined with the reverse curvature of the periphery, it converges the peripheral light, ensuring a lower angle of incidence for the light entering the chip, which helps improve illumination, reduce CRA, and enhance image quality. Furthermore, the eighth lens element can be an aspheric lens, providing a smooth transition of light to the imaging plane, correcting astigmatism and field curvature, and improving the resolution of the optical system.

[0124] In a second example, the eighth lens element can have negative optical power, and its first and second side surfaces can be, for example, concave. The eighth lens element is a negative lens element with a concave first side surface, which can diverge the light rays converging in front of it, reducing the optical path difference and improving image quality. The second side surface of the eighth lens element is concave, which can diverge the central light rays, allowing them to reach a higher imaging position. Simultaneously, combined with the reverse curvature of the periphery, the peripheral light rays converge, ensuring that the angle of incidence of light entering the chip is reduced, helping to improve illumination and reduce CRA, thereby improving image quality.

[0125] In the third example, the eighth lens can have a negative focal length, the first side surface thereof can be concave, and the second side surface thereof can be convex. The eighth lens is a negative lens, and the first side surface is configured to be concave, so that the light rays converging in front are diverged, so that the light rays reach a higher imaging position, large image surface imaging is achieved, and imaging quality is improved. The second side surface of the eighth lens is configured to be convex, so that the light rays diverged via the first side surface of the eighth lens are appropriately converged, so that a small aperture at the rear end is achieved while high resolution is met.

[0126] In the fourth example, the eighth lens can have a positive focal length, the first side surface thereof can be convex, and the second side surface thereof can be concave. The eighth lens is a positive lens, and the first side surface is configured to be convex, so that the light rays are further adjusted to be convergent, the distance to the imaging surface is shortened, miniaturization is achieved, light loss is reduced, and imaging quality is improved. The first side surface of the eighth lens is configured to be convex, so that the light rays have a small incidence angle, more light rays enter the optical system, high flux is achieved, the light rays converging in front are transmitted by the front optical system, the imaging surface is quickly reached, and short TTL is achieved. The second side surface of the eighth lens is configured to be concave, so that the central light rays are diverged, the light rays can reach a higher imaging position, the peripheral light rays are convergent due to the reverse bending of the periphery, the incidence angle of the light rays entering the chip is reduced, and the imaging quality is improved.

[0127] In the fifth example, the eighth lens can have a positive focal length, the first side surface thereof can be concave, and the second side surface thereof can be convex. The eighth lens is a positive lens, and the first side surface is configured to be concave, so that the light rays converging in front are diverged, so that the light rays reach a higher imaging position, large image surface imaging is achieved, and imaging quality is improved. The second side surface of the eighth lens is configured to be convex, so that the light rays diverged via the first side surface of the eighth lens are appropriately convergent, so that a small aperture at the rear end is achieved while high resolution is met.

[0128] In the sixth example, the eighth lens can have a positive focal length, the first side surface thereof can be convex, and the second side surface thereof can be convex. The first side surface of the eighth lens is configured to be convex, so that the light rays have a small incidence angle, more light rays enter the optical system, high flux is achieved, the light rays converging in front are transmitted by the front optical system, the imaging surface is quickly reached, and short TTL is achieved. The second side surface of the eighth lens is configured to be convex, so that the light rays in front are appropriately convergent, and the rear aperture is reduced.

[0129] In the example embodiment, the optical lens can further include a diaphragm, which can be disposed between the second lens and the third lens, for example. By disposing the diaphragm between the second lens and the third lens, the entrance pupil position is small, which is conducive to effectively converging the light entering the optical system, reducing the lens aperture of the front end of the optical system, increasing the light brightness, and reducing the sensitivity of the optical lens during assembly. It should be understood that the diaphragm disposed between the second lens and the third lens is only exemplary, and the present application does not specifically limit this, and the diaphragm can also be disposed at other positions according to actual needs.

[0130] In the example embodiment, the optical lens at least adopts two aspheric lenses. For example, one or more aspheric surfaces can be included in the surfaces of the second lens, the seventh lens, and the eighth lens, which is conducive to correcting system aberration and improving resolution, especially reducing large field aberration. It should be understood that the aspheric lens can achieve cost reduction requirements without affecting temperature performance.

[0131] In the example embodiment, the first side and the second side of the second lens, the first side and the second side of the seventh lens, and the first side and the second side of the eighth lens can have at least one inflection point. By such a configuration, it is conducive to balancing the aberration of the central field of view and the edge field of view and improving the resolution.

[0132] In the example embodiment, the optical lens can further include a filter between the fifth lens and the image plane to filter light with different wavelengths. It should be understood that the optical lens can also dispose 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.

[0133] In the example embodiment, the optical lens can further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0134] In the example embodiment, the effective focal length F7 of the seventh lens and the effective focal length F8 of the eighth lens can satisfy: 0<|F7 / F8|≤3.5. Preferably, 0.025≤|F7 / F8|≤2.8. Further, 0.065≤|F7 / F8|≤2.663. By controlling the relationship, the absolute focal length ratio of the seventh lens and the eighth lens is controlled within a reasonable range, which can make the central field of view light trend stable, and at the same time, the chief rays of each field of view can be smoothly incident to the image plane, reducing the sensitivity and reducing the CRA.

[0135] Preferably, the effective focal length F7 of the seventh lens and the effective focal length F8 of the eighth lens can satisfy: -3≤F7 / F8<0. Preferably, -2.8≤F7 / F8≤-0.03. Further, -2.663≤F7 / F8<-0.065. By controlling the relationship, the positive and negative lenses of the seventh lens and the eighth lens are matched with each other, which is beneficial to realize aberration correction and sensitivity complementarity, thereby further reducing sensitivity and improving image quality.

[0136] In an example embodiment, the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens can satisfy: -28≤F7 / F≤-2.5. Preferably, -24≤F7 / F≤-2.75. Further, -21.226≤F7 / F≤-3.071. By controlling the relationship, the effective focal length of the seventh lens is negative, which can diverge light rays, regulate the optical path difference of light rays in each field of view, make the deflection degree of light rays incident and emitted from the seventh lens low, and reduce sensitivity, while being beneficial to realize large target surface imaging.

[0137] In an example embodiment, the curvature radius R41 of the first side surface of the fourth lens and the curvature radius R42 of the second side surface of the fourth lens can satisfy: -2.75≤R41 / R42≤-0.5. Preferably, -2.5≤R41 / R42≤-0.55. Further, -2.364≤R41 / R42≤-0.688. By controlling the relationship, the first side surface and the second side surface of the fourth lens are both convex, and the ratio between the curvature radii of the two side surfaces can effectively converge light rays at the fourth lens, so that the rear aperture can be compressed to ensure overall miniaturization.

[0138] In an example embodiment, the curvature radius R41 of the first side surface of the fourth lens and the total effective focal length F of the optical lens can satisfy: 1.8≤R41 / F≤9.5. Preferably, 2≤R41 / F≤9. Further, 2.328≤R41 / F≤7.888. By controlling the relationship, the first side surface of the fourth lens is convex, and the curvature radius has a small value, which can smoothly accept and compress light rays in front, and reduce the aperture at the rear end.

[0139] In an example embodiment, the curvature radius R42 of the second side surface of the fourth lens and the total effective focal length F of the optical lens can satisfy: -6≤R42 / F≤-1.25. Preferably, -5.7≤R42 / F≤-1.4. Further, -4.991≤R42 / F≤-1.651. By controlling the relationship, the second side surface of the fourth lens is convex, and the curvature radius has a small value, which can further compress light rays in front and reduce the miniaturization at the rear end.

[0140] In the example embodiment, the central thickness d8 of the eighth lens on the optical axis, the sag SAG82 of the second side surface of the eighth lens, and the sag SAG81 of the first side surface of the eighth lens can satisfy: 0.5≤d8 / (d8+SAG82-SAG81)≤1.75. Preferably, 0.65≤d8 / (d8+SAG82-SAG81)≤1.55. Further, 0.761≤d8 / (d8+SAG82-SAG81)≤1.309. By controlling the relationship, the proportion of the eighth lens is controlled to be uniform, so that the overall shape of the eighth lens is relatively flat, the overall moment is small when the radial force is applied, the thermal expansion and contraction change is uniform, and the thermal performance is good.

[0141] In the example embodiment, the maximum clear aperture D on the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.24≤D / TTL≤0.35. Preferably, 0.27≤D / TTL≤0.34. Further, 0.299≤D / TTL≤0.332. By controlling the ratio between the maximum clear aperture on the first side surface of the first lens and the total optical length of the optical lens, a short TTL is achieved while meeting the small front-end aperture and high resolution.

[0142] In the example embodiment, the maximum clear aperture D82 on the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens and the total optical length TTL of the optical lens can satisfy: 0.27≤D82 / TTL≤0.42. Preferably, 0.3≤D82 / TTL≤0.38. Further, 0.322≤D82 / TTL≤0.365. By controlling the ratio between the maximum clear aperture on the second side surface of the eighth lens and the total optical length of the optical lens, a short TTL is achieved while meeting the small rear-end aperture and high resolution.

[0143] In the example embodiment, the axial distance d78 from the second side surface of the seventh lens to the first side surface of the eighth lens and the total optical length TTL of the optical lens can satisfy: 0.022≤d78 / TTL≤0.072. Preferably, 0.025≤d78 / TTL≤0.068. Further, 0.027≤d78 / TTL≤0.063. By controlling the relationship, although the light rays are generally converging through the fourth lens to the sixth lens, the compression trend is slowed down at the seventh lens, and the air gap distance between the seventh lens and the eighth lens is moderately widened, reducing the sensitivity and improving the imaging quality.

[0144] In the example embodiments, the effective focal length F5 of the fifth lens and the effective focal length F6 of the sixth lens can satisfy: 0.64≤|F5 / F6|≤1.55. Preferably, 0.7≤|F5 / F6|≤1.4. Further, 0.751≤|F5 / F6|≤1.227. By controlling the relationship, the positive or negative focal length of the fifth lens and the sixth lens is controlled, which is conducive to the smooth trend of light in the cemented lens, reduces the loss of light energy, better corrects chromatic aberration, and improves the resolution quality.

[0145] 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: -1.85≤F1 / F≤-0.8. Preferably, -1.7≤F1 / F≤-0.9. Further, -1.558≤F1 / F≤-1.027. By controlling the relationship, the effective focal length of the first lens is controlled to be negative and small, which is conducive to collecting large field of view light under a small front aperture, so that the light can enter the rear optical system well after being diverged by the first lens, and long-focus and large-field imaging is realized.

[0146] 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: 1.1≤F4 / F≤4.4. Preferably, 1.2≤F4 / F≤4. Further, 1.405≤F4 / F≤3.739. By controlling the relationship, the effective focal length of the fourth lens is controlled to be positive and small, which can play a key converging role in the entire optical system, so that the light can enter the rear optical system smoothly, compress the rear aperture, and realize a small total length while meeting high resolution, and also consider a small overall aperture.

[0147] In the example embodiments, the total effective focal length F of the optical lens and the effective focal length F2 of the second lens can satisfy: 0<|F / F2|≤0.35. Preferably, 0.005≤|F / F2|≤0.33. Further, 0.019≤|F / F2|≤0.321. By controlling the relationship, the ratio of the total focal length to the effective focal length of the second lens is small, which can make the light beam expand smoothly in the second lens, and is conducive to realizing a small aperture at the front end.

[0148] It is worth noting that the present application cooperates with the relationship 0<|F / F2|≤0.35, the relationship -1.85≤F1 / F≤-0.8, and the relationship 0.24≤D / TTL≤0.35, which is conducive to realizing a small aperture at the front end while improving the resolution, and also considering a large field of view and long focus.

[0149] In the example embodiment, the light passing aperture D on the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens can satisfy: 0.004≤D / H / FOV×1°≤0.014. Preferably, 0.007≤D / H / FOV×1°≤0.012. Further, 0.009≤D / H / FOV×1°≤0.010. By controlling the relationship, the front aperture of the optical lens, the maximum field of view angle of the optical lens, and the corresponding image height are controlled, which is conducive to meeting high resolution while realizing small aperture at the front end of the lens, and taking into account large field of view and large image surface.

[0150] In the example embodiment, the light passing aperture D1 on the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens can satisfy: 0.4≤D1 / H / θ≤1.25. Preferably, 0.5≤D1 / H / θ≤1. Further, 0.807≤D1 / H / θ≤0.848. By controlling the relationship, the front aperture of the optical lens, the image height corresponding to the maximum field of view angle of the optical lens, and the radian value are controlled, which can realize large field of view imaging and miniaturization of the lens as a whole.

[0151] In the example embodiment, the total effective focal length F of the optical lens and the combined focal length F56 of the fifth lens and the sixth lens can satisfy: 0<|F / F56|≤0.25. Preferably, 0<|F / F56|≤0.175. Further, 0.002≤|F / F56|≤0.114. By controlling the relationship, the combined focal length of the cemented lens is reasonably controlled, which can better accommodate the converging light rays in front, so that the light rays are smoothly transmitted to the seventh lens, and the overall trend of the light rays is gently converging, so as to improve the imaging quality while reducing the rear aperture.

[0152] In the example embodiment, the maximum field of view angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens can satisfy: 50°≤(FOV×F) / H≤75°. Preferably, 55°≤(FOV×F) / H≤70°. Further, 60.890°≤(FOV×F) / H≤64.267°. By controlling the relationship, the total effective focal length, the image height, and the field of view angle of the optical lens are controlled, which is conducive to meeting high resolution while realizing long focus and taking into account large field of view characteristics.

[0153] In the example embodiments, the total optical length TTL of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy 2.4≤TTL / H≤3.4. Preferably, 2.7≤TTL / H≤3.2. Further, 2.875≤TTL / H≤2.958. By controlling the relationship, the total optical length and the image height of the optical lens are reasonably controlled, which is conducive to the miniaturization of the optical system while meeting the high resolution.

[0154] In the example embodiments, the back focal length BFL of the optical lens and the on-axis distance TL from the first side surface of the first lens to the second side surface of the eighth lens can satisfy 0.05≤BFL / TL≤0.135. Preferably, 0.055≤BFL / TL≤0.125. Further, 0.068≤BFL / TL≤0.113. By controlling the relationship, the back focal length and the on-axis distance TL of the optical lens are reasonably controlled, which is conducive to the flexible adjustment of the lens thickness and the air gap, and the realization of miniaturization while meeting the appropriate back focal length.

[0155] In the example embodiments, the radius of curvature R11 of the first side surface of the first lens and the total effective focal length F of the optical lens can satisfy 2.8≤|R11 / F|≤70. Preferably, 3≤|R11 / F|≤65. Further, 3.487≤|R11 / F|≤60.917. By controlling the relationship, the radius of curvature of the first side surface of the first lens can make the pupil image of the ghost image far away from the focal plane, so that the ghost image light on the image plane is relatively divergent, effectively reducing the relative energy value of the ghost image, and improving the quality of the lens imaging picture.

[0156] In the example embodiments, the effective focal length F4 of the fourth lens, the combined focal length F56 of the fifth lens and the sixth lens, the effective focal length F3 of the third lens, and the total effective focal length F of the optical lens can satisfy 0.42≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤1.3. Preferably, 0.48≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤1.15. Further, 0.504≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤0.992. By controlling the relationship, the refractive power of the third lens to the sixth lens is reasonably set, so that the height of the light passing through the third lens to the sixth lens is relatively close, the light trend is relatively gentle, and the light can be effectively and continuously converged, which helps to reduce the loss of light energy, reduce the system sensitivity, and improve the resolution quality.

[0157] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.5≤F / H≤0.73. Preferably, 0.55≤F / H≤0.68. Further, 0.599≤F / H≤0.632. By controlling the relationship, the ratio of the total effective focal length and the image height of the optical lens is reasonably controlled, which is conducive to the optical system to meet high resolution while taking into account long focal length.

[0158] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.5≤F / H≤0.73. Preferably, 0.55≤F / H≤0.68. Further, 0.599≤F / H≤0.632. By controlling the relationship, the ratio of the total effective focal length and the image height of the optical lens is reasonably controlled, which is conducive to the optical system to meet high resolution while taking into account long focal length.

[0159] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.5≤F / H≤0.73. Preferably, 0.55≤F / H≤0.68. Further, 0.599≤F / H≤0.632. By controlling the relationship, the ratio of the total effective focal length and the image height of the optical lens is reasonably controlled, which is conducive to the optical system to meet high resolution while taking into account long focal length.

[0160] In the example embodiments, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.5≤F / H≤0.73. Preferably, 0.55≤F / H≤0.68. Further, 0.599≤F / H≤0.632. By controlling the relationship, the ratio of the total effective focal length and the image height of the optical lens is reasonably controlled, which is conducive to the optical system to meet high resolution while taking into account long focal length.

[0161] In exemplary embodiments, the axial distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens can satisfy 0≤d56 / TTL≤0.002, where TTL is the total track length of the optical lens. Preferably, 0≤d56 / TTL≤0.001. Further, 0≤d56 / TTL≤0.0006. By controlling the relationship, the air gap between the fifth lens and the sixth lens is reduced as much as possible, which allows the light to transition smoothly between the fifth lens and the sixth lens, reduces sensitivity, and reduces the optical assembly. It should be understood that when the air gap between the fifth lens and the sixth lens is smaller, the fifth lens and the sixth lens can be selected to be glued, which is beneficial for chromatic aberration correction and improves resolution. For example, the glue layer thickness between the fifth lens and the sixth lens is usually between 5um and 20um, and the relationship d56 / TTL can be 0.0003 or 0.0002, etc.

[0162] In exemplary embodiments, the sum of the central thicknesses CT37 of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens on the optical axis and the axial distance L37 from the first side surface of the third lens to the second side surface of the seventh lens can satisfy 0.85≤CT37 / L37≤0.99. Preferably, 0.86≤CT37 / L37≤0.985. Further, 0.866≤CT37 / L37≤0.982. By controlling the relationship, the air gap between the first side surface of the third lens and the second side surface of the seventh lens on the optical axis is small, which can realize compact arrangement of each lens, is beneficial for miniaturization, avoids stray light from entering the system, and ensures that the lens has high resolution quality.

[0163] It is worth noting that the present application cooperates with the relationship 0.85≤CT37 / L37≤0.99, the relationship 1.1≤F4 / F≤4.4, and the relationship -28≤F7 / F≤-2.5, which is beneficial for reducing the rear aperture and the total optical length while regulating the optical path difference of each field of view, reducing the introduction of stray light, and improving resolution.

[0164] In the example embodiments, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens can satisfy: 1.9≤|F8 / F|. Preferably, 2.1≤|F8 / F|≤200. Further, 2.333≤|F8 / F|≤174.813. By controlling the relationship, the effective focal length of the eighth lens is reasonably controlled to be large, so that the light is smoothly accepted by the eighth lens and smoothly transitions to the image plane, realizing small CRA and high resolution. It should be understood that the larger the absolute value of the effective focal length of the eighth lens, the smaller the influence on the trend of the light; for example, the absolute value of the effective focal length of the eighth lens in the following embodiment 27 is 174.813, and when the absolute value of the effective focal length of the eighth lens is greater than 174.813, especially when it is infinite, the eighth lens has little effect on the trend of the light, which is beneficial to the smooth transition of the light.

[0165] In the example embodiments, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens can satisfy: 0.58≤(H / 2) / (Fxtan(θ / 2))≤0.75. Preferably, 0.62≤(H / 2) / (Fxtan(θ / 2))≤0.7. Further, 0.644≤(H / 2) / (Fxtan(θ / 2))≤0.680. By controlling the relationship, the image height, total effective focal length, and maximum field of view angle of the optical lens are reasonably controlled, which is beneficial to the lens to realize lower distortion, improve the angular resolution, and highlight the imaging quality of the partial area.

[0166] The optical lens according to the above embodiments of the present application can adopt multiple lenses, for example, the eight lenses described above. By reasonably allocating the optical parameters of each lens, the optical lens is realized to be small in aperture and size, high in resolution, low in sensitivity, large in angular resolution, large in field of view, long in back focal length, low in distortion, small in main light angle, high in illumination, and good in processability, and can be well matched with various application end chips, for example, vehicle-mounted chips, and can better inhibit the dark corner phenomenon. The optical lens has good temperature performance, and the imaging effect changes little at high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above embodiments of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0167] 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 plane or image source plane; the back focal length BFL of the optical lens is the axial distance from the second side of the eighth lens to the imaging plane or image source plane; 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.

[0168] In addition, the application focuses on protecting the lens architecture, and the lens surface type is not limited to spherical or aspherical; if the focus is on the resolution quality, the lenses can all use aspherical lenses. The lens material is also not limited to plastic and glass; if the focus is on the temperature performance, the lenses can all use glass lenses.

[0169] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the application, to obtain the various results and advantages described in the specification. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to including eight lenses. If necessary, the optical lens can also include other numbers of lenses.

[0170] The specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units of the basic parameters of the optical lens, the radius of curvature and the thickness / distance, are mm.

[0171] Embodiment 1

[0172] The following refers to Figure 1 The optical lens according to Embodiment 1 of the application is described.

[0173] As shown in Figure 1 , the optical lens sequentially includes, along the optical axis from the first side to the second side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8. A stop STO can be disposed between the second lens L2 and the third lens L3. The fifth lens L5 and the sixth lens L6 are cemented to form a cemented lens.

[0174] The first lens L1 has a negative focal power, and its first side S1 is a concave surface, and the second side S2 is a concave surface.

[0175] The second lens L2 has a positive focal power, and its first side S3 is a concave surface, and the second side S4 is a convex surface.

[0176] The third lens L3 has a positive focal power, and its first side S5 is a convex surface, and the second side S6 is a convex surface.

[0177] The fourth lens L4 has a positive focal power, and its first side S7 is a convex surface, and the second side S8 is a convex surface.

[0178] The fifth lens L5 has a positive focal power, and its first side S9 is a convex surface, and the second side S10 is a convex surface.

[0179] The sixth lens L6 has a negative focal power, and its first side is a concave surface, and the second side S11 is a convex surface.

[0180] The seventh lens L7 has negative refractive power, the first side S12 is convex, and the second side S13 is concave.

[0181] The eighth lens L8 has positive refractive power, the first side S14 is convex, and the second side S15 is concave.

[0182] The first side S14 and the second side S15 of the eighth lens L8 in the optical lens have at least one inflection point.

[0183] The second side of the optical lens is provided with an image plane IMA, and a filter IR is arranged between the eighth lens L8 and the image plane IMA, the filter IR has a first side S16 and a second side S17. When the IMA is an imaging plane, light from an object sequentially passes through each surface and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA sequentially passes through each surface and is finally projected on the object.

[0184] Table 1 shows the basic parameter table of the optical lens of embodiment 1. It should be understood that the first side of the sixth lens L6 has exactly the same surface parameters as the second side S10 of the fifth lens L5.

[0185] Table 1

[0186]

[0187] In embodiment 1, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces, and the surface type of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0188] (1)

[0189] wherein x is the distance from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis direction, h is the height of the aspherical surface, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2-1 and Table 2-2 show the conic coefficient k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical surface S3, S4, S12, S13, S14 and S15 in embodiment 1.

[0190] Table 2-1

[0191]

[0192] Table 2-2

[0193]

[0194] from Figure 2 From the above, the MTF peak value of the central field of view of the optical lens of Example 1 can reach 0.81 at the spatial frequency of 119 lp / mm (119 line pairs / mm); Figure 3 From the perspective of the embodiment 1, the relative illumination at the edge of the optical lens reaches 0.65; Figure 4 From this perspective, the optical lens of Example 1 introduces distortion at the edges, resulting in a higher resolution in the central imaging area and improving the imaging quality in the central area. Therefore, the optical lens of Example 1 has good imaging quality and can achieve a high resolution of 5 megapixels.

[0195] Example 2

[0196] The following reference Figure 5 The optical lens according to embodiment 2 of the present application is described. Figure 5 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0197] Table 3 shows the basic parameters of the optical lens of Example 2.

[0198] Table 3

[0199]

[0200] In Example 2, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 4-1 and 4-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 2.

[0201] Table 4-1

[0202]

[0203] Table 4-2

[0204]

[0205] from Figure 6The MTF peak value of the central field of view of the optical lens of Embodiment 2 can reach 0.8 at a spatial frequency of 119 lp / mm (119 lines per millimeter); from Figure 7 The relative illumination of the optical lens of Embodiment 2 at the edge reaches 0.65; from Figure 8 The optical lens of Embodiment 2 introduces distortion at the edge, so that the central imaging area has higher resolution, and the imaging quality of the central area is improved. Therefore, the optical lens given in Embodiment 2 has good imaging quality and can achieve a high resolution of five million pixels.

[0206] Embodiment 3

[0207] The optical lens according to Embodiment 3 of the present application is described below with reference to Figure 9 As shown in Table 5, the main difference between Embodiment 3 and Embodiment 1 is that the optical parameters of the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different, and the first side S1 of the first lens L1 is a convex surface. Figure 9

[0208] Table 5

[0209]

[0210] In Embodiment 3, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces. Table 6-1 and Table 6-2 give the conic coefficients k and the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Embodiment 3.

[0211] Table 6-1

[0212]

[0213] Table 6-2

[0214]

[0215] It has been tested that the optical lens given in Embodiment 3 has good imaging quality and can achieve a high resolution of five million pixels.

[0216] Embodiment 4

[0217] The optical lens according to Embodiment 4 of the present application is described below with reference to Figure 10 As shown in Table 5, the main difference between Embodiment 3 and Embodiment 1 is that the optical parameters of the radii of curvature of the surfaces of the lenses and the thicknesses of the lenses are different, and the first side S1 of the first lens L1 is a convex surface. Figure 10 ​As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S1 of the first lens L1 is convex; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0218] Table 7 shows the basic parameters of the optical lens of Example 4.

[0219] Table 7

[0220]

[0221] In Example 4, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 8-1 and 8-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 4.

[0222] Table 8-1

[0223]

[0224] Table 8-2

[0225]

[0226] After testing, the optical lens provided in Example 4 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0227] Example 5

[0228] The following reference Figure 11 The optical lens according to embodiment 5 of the present application is described. Figure 11 As shown, the main differences between this embodiment and embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the first side surface S3 of the second lens L2 is a convex surface.

[0229] Table 9 shows the basic parameters of the optical lens of Example 5.

[0230] Table 9

[0231]

[0232] In Example 5, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 10-1 and 10-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 5.

[0233] Table 10-1

[0234]

[0235] Table 10-2

[0236]

[0237] After testing, the optical lens provided in Example 5 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0238] Example 6

[0239] The following reference Figure 12 The optical lens according to embodiment 6 of the present application is described. Figure 12 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; and the first side surface S3 of the second lens L2 is convex. Table 11 shows the basic parameters of the optical lens of Example 6.

[0240] Table 11

[0241]

[0242] In Example 6, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 12-1 and 12-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 6.

[0243] Table 12-1

[0244]

[0245] Table 12-2

[0246]

[0247] After testing, the optical lens provided in Example 6 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0248] Example 7

[0249] The following reference Figure 13 The optical lens according to embodiment 7 of the present application is described. Figure 13 As shown, the main differences between this embodiment and embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the second lens L2 has negative optical power.

[0250] Table 13 shows the basic parameters of the optical lens of Example 7.

[0251] Table 13

[0252]

[0253] In Example 7, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 14-1 and 14-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 7.

[0254] Table 14-1

[0255]

[0256] Table 14-2

[0257]

[0258] After testing, the optical lens provided in Example 7 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0259] Example 8

[0260] The following reference Figure 14 The optical lens according to Example 8 of the present application is described. Figure 14 As shown, the main differences between this embodiment and embodiment 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; and the second lens L2 has negative optical power.

[0261] Table 15 shows the basic parameters of the optical lens of Example 8.

[0262] Table 15

[0263]

[0264] In Example 8, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 16-1 and 16-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 8.

[0265] Table 16-1

[0266]

[0267] Table 16-2

[0268]

[0269] After testing, the optical lens provided in Example 8 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0270] Example 9

[0271] The following reference Figure 15 The optical lens according to Example 9 of the present application is described. Figure 15 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power, the first side surface S3 of the second lens L2 is convex, and the second side surface S4 of the second lens L2 is concave; and the first side surface S3 of the second lens L2 has at least one inflection point.

[0272] Table 17 shows the basic parameters of the optical lens of Example 9.

[0273] Table 17

[0274]

[0275] In Example 9, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 18-1 and 18-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 9.

[0276] Table 18-1

[0277]

[0278] Table 18-2

[0279]

[0280] After testing, the optical lens provided in Example 9 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0281] Example 10

[0282] The following reference Figure 16 The optical lens according to embodiment 10 of the present application is described. Figure 16 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second lens L2 has negative optical power, the first side surface S3 of the second lens L2 is convex, and the second side surface S4 of the second lens L2 is concave; and the first side surface S3 of the second lens L2 has at least one inflection point.

[0283] Table 19 shows the basic parameters of the optical lens of Example 10.

[0284] Table 19

[0285]

[0286] In Example 10, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 20-1 and 20-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 10.

[0287] Table 20-1

[0288]

[0289] Table 20-2

[0290]

[0291] After testing, the optical lens provided in Example 10 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0292] Example 11

[0293] The following reference Figure 17 The optical lens according to embodiment 11 of the present application is described. Figure 17 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the second lens L2 has negative optical power, and the second side surface S4 of the second lens L2 is concave; the second side surface S4 of the second lens L2 has at least one inflection point, while the second side surface S15 of the eighth lens L8 has no inflection point.

[0294] Table 21 shows the basic parameter table of the optical lens of Example 11.

[0295] Table 21

[0296]

[0297] In Example 11, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 22-1 and 22-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 11.

[0298] Table 22-1

[0299]

[0300] Table 22-2

[0301]

[0302] After testing, the optical lens provided in Example 11 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0303] Example 12

[0304] The optical lens according to the embodiment 12 of the present application is described below. As shown in Figure 18 The optical lens according to the embodiment 12 of the present application is described below. As shown in Figure 18 The main differences between this embodiment and the embodiment 1 are: the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; and the second lens L2 has a negative focal power, and the second side S4 of the second lens L2 is a concave surface; the second side S4 of the second lens L2 has at least one inflection point, and the second side S15 of the eighth lens L8 has no inflection point.

[0305] Table 23 shows the basic parameter table of the optical lens of the embodiment 12.

[0306] Table 23

[0307]

[0308] In the embodiment 12, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces. Table 24-1 and Table 24-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in the embodiment 12.

[0309] Table 24-1

[0310]

[0311] Table 24-2

[0312]

[0313] It has been tested that the optical lens given in the embodiment 12 has good imaging quality and can achieve a high resolution of five million pixels.

[0314] Embodiment 13

[0315] The optical lens according to the embodiment 13 of the present application is described below. As shown in Figure 19 The optical lens according to the embodiment 13 of the present application is described below. As shown in Figure 19 The main differences between this embodiment and the embodiment 1 are: the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; and the second side S6 of the third lens L3 is a concave surface; the second side S13 of the seventh lens L7 has at least one inflection point.

[0316] Table 25 shows the basic parameter table of the optical lens of the embodiment 13.

[0317] Table 25

[0318]

[0319] In Example 13, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 26-1 and 26-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 13.

[0320] Table 26-1

[0321]

[0322] Table 26-2

[0323]

[0324] After testing, the optical lens provided in Example 13 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0325] Example 14

[0326] The following reference Figure 20 The optical lens according to embodiment 14 of the present application is described. Figure 20 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the second side surface S6 of the third lens L3 is concave; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0327] Table 27 shows the basic parameter table of the optical lens of Example 14.

[0328] Table 27

[0329]

[0330] In Example 14, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 28-1 and 28-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 14.

[0331] Table 28-1

[0332]

[0333] Table 28-2

[0334]

[0335] After testing, the optical lens provided in Example 14 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0336] Example 15

[0337] The following reference Figure 21 The optical lens according to embodiment 15 of the present application is described. Figure 21 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the first side surface S5 of the third lens L3 is concave; and the second side surface S13 of the seventh lens L7 has at least one inflection point. Table 29 shows the basic parameters of the optical lens of Example 15.

[0338] Table 29

[0339]

[0340] In Example 15, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 30-1 and 30-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 15.

[0341] Table 30-1

[0342]

[0343] Table 30-2

[0344]

[0345] The optical lens given in Example 15 has good imaging quality and can achieve a high resolution of five million pixels.

[0346] Example 16

[0347] The optical lens according to Example 16 of the present application is described below with reference to Figure 22 The optical lens according to Example 17 of the present application is described below with reference to Figure 22 As shown in Table 31, the main differences between the optical lens of the present embodiment and the optical lens of Example 1 are that the radii of curvature and the thicknesses of the lens surfaces are different, the first side surface S5 of the third lens L3 is a concave surface, and the second side surface S13 of the seventh lens L7 has at least one inflection point. Table 31 shows the basic parameter table of the optical lens of Example 16.

[0348] Table 31

[0349]

[0350] In Example 16, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are aspherical surfaces. Table 32-1 and Table 32-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 16.

[0351] Table 32-1

[0352]

[0353] Table 32-2

[0354]

[0355] The optical lens given in Example 16 has good imaging quality and can achieve a high resolution of five million pixels.

[0356] Example 17

[0357] The optical lens according to Example 17 of the present application is described below with reference to Figure 23 The optical lens according to Example 17 of the present application is described below with reference to Figure 23As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the third lens L3 has negative optical power, and the first side surface S5 of the third lens L3 is concave; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0358] Table 33 shows the basic parameter table of the optical lens of Example 17.

[0359] Table 33

[0360]

[0361] In Example 17, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 34-1 and 34-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 17.

[0362] Table 34-1

[0363]

[0364] Table 34-2

[0365]

[0366] After testing, the optical lens provided in Example 17 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0367] Example 18

[0368] The following reference Figure 24 The optical lens according to embodiment 18 of the present application is described. Figure 24 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the third lens L3 has negative optical power, and the first side surface S5 of the third lens L3 is concave; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0369] Table 35 shows the basic parameter table of the optical lens of Example 18.

[0370] Table 35

[0371]

[0372] In Embodiment 18, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Table 36-1 and Table 36-2 give the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical surfaces S3, S4, S12, S13, S14, and S15 in Embodiment 18.

[0373] Table 36-1

[0374]

[0375] Table 36-2

[0376]

[0377] It has been tested that the optical lens given in Embodiment 18 has good imaging quality and can achieve a high resolution of five million pixels.

[0378] Embodiment 19

[0379] The following refers to Figure 25 An optical lens according to Embodiment 19 of the present application is described. As shown in Figure 25 the main differences between this embodiment and Embodiment 1 are: the radii of curvature, the thicknesses of the lenses, and other optical parameters of the surfaces of the lenses are different; the first side surface S1 of the first lens L1 is a convex surface; the third lens L3 has a negative focal power, and the second side surface S6 of the third lens L3 is a concave surface; and the second side surface S11 of the sixth lens L6 is a concave surface.

[0380] Table 37 shows the basic parameter table of the optical lens of Embodiment 19.

[0381] Table 37

[0382]

[0383] In Embodiment 19, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Table 38-1 and Table 38-2 give the conic coefficients k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical surfaces S3, S4, S12, S13, S14, and S15 in Embodiment 19.

[0384] Table 38-1

[0385]

[0386] Table 38-2

[0387]

[0388] After testing, the optical lens provided in Example 19 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0389] Example 20

[0390] The following reference Figure 26 The optical lens according to embodiment 20 of the present application is described. Figure 26 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the radius of curvature of each lens surface and lens thickness are different; the first side surface S1 of the first lens L1 is convex; the third lens L3 has negative optical power, and the second side surface S6 of the third lens L3 is concave; and the second side surface S11 of the sixth lens L6 is concave. Table 39 shows the basic parameters of the optical lens of Example 20.

[0391] Table 39

[0392]

[0393] In Example 20, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 40-1 and 40-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 20.

[0394] Table 40-1

[0395]

[0396] Table 40-2

[0397]

[0398] After testing, the optical lens provided in Example 20 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0399] Example 21

[0400] The following reference Figure 27An optical lens according to Embodiment 21 of the present application is described. As shown in Figure 27 The main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; the first side S1 of the second lens L2 is a convex surface, the second side S2 of the second lens L2 is a concave surface; the first side S5 of the third lens L3 is a concave surface; the fifth lens L5 has negative focal power, and the second side S10 of the fifth lens L5 is a concave surface; and the sixth lens L6 has positive focal power, and the first side of the sixth lens L6 is a convex surface. Table 41 shows the basic parameter table of the optical lens of Embodiment 21.

[0401] Table 41

[0402]

[0403] In Embodiment 21, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are aspherical surfaces. Table 42-1 and Table 42-2 give the conic constant k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of each aspherical surface S3, S4, S12, S13, S14, and S15 that can be used in Embodiment 21.

[0404] Table 42-1

[0405]

[0406] Table 42-2

[0407]

[0408] It has been found that the optical lens given in Embodiment 21 has good imaging quality and can achieve a high resolution of five million pixels.

[0409] Embodiment 22

[0410] The following refers to Figure 28 An optical lens according to Embodiment 22 of the present application is described. As shown in Figure 28 The main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different; the first side S1 of the second lens L2 is a convex surface, the second side S2 of the second lens L2 is a concave surface; the first side S5 of the third lens L3 is a concave surface; the fifth lens L5 has negative focal power, and the second side S10 of the fifth lens L5 is a concave surface; and the sixth lens L6 has positive focal power, and the first side of the sixth lens L6 is a convex surface.

[0411] Table 43 shows the basic parameter table of the optical lens of Example 22.

[0412] Table 43

[0413]

[0414] In Example 22, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 44-1 and 44-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 22.

[0415] Table 44-1

[0416]

[0417] Table 44-2

[0418]

[0419] After testing, the optical lens provided in Example 22 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0420] Example 23

[0421] The following reference Figure 29 The optical lens according to embodiment 23 of the present application is described. Figure 29 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the first side surface S5 of the third lens element L3 is concave; the fifth lens element L5 has negative optical power, and the first side surface of the fifth lens element L5 is concave, and the second side surface S10 of the fifth lens element L5 is also concave; the sixth lens element L6 has positive optical power, and the first side surface of the sixth lens element L6 is convex.

[0422] Table 45 shows the basic parameter table of the optical lens of Example 23.

[0423] Table 45

[0424]

[0425] In Embodiment 23, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces. Table 46-1 and Table 46-2 give the conic constant k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 used in Embodiment 23.

[0426] Table 46-1

[0427]

[0428] Table 46-2

[0429]

[0430] It has been found that the optical lens according to Embodiment 23 has good imaging quality and can achieve a high resolution of five million pixels.

[0431] Embodiment 24

[0432] The following refers to Figure 30 An optical lens according to Embodiment 24 is described. As shown in Figure 30 the main differences between this embodiment and Embodiment 1 are: the radii of curvature and the thicknesses of the lens surfaces are different; the first side S5 of the third lens L3 is a concave surface; the fifth lens L5 has a negative focal power, and the first side of the fifth lens L5 is a concave surface, and the second side S10 of the fifth lens L5 is a concave surface; and the sixth lens L6 has a positive focal power, and the first side of the sixth lens L6 is a convex surface.

[0433] Table 47 shows the basic parameter table of the optical lens according to Embodiment 24.

[0434] Table 47

[0435]

[0436] In Embodiment 24, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces. Table 46-1 and Table 46-2 give the conic constant k and the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 used in Embodiment 23.

[0437] Table 48-1

[0438]

[0439] Table 48-2

[0440]

[0441] The optical lens given in Example 24 has good imaging quality and can achieve a high resolution of five million pixels.

[0442] Example 25

[0443] The following refers to Figure 31 An optical lens according to Example 25 of the present application is described. As shown in Figure 31 compared with Example 1, the main differences are that the radii of curvature, lens thicknesses and other optical parameters of the lens surfaces are different; the first side S12 of the seventh lens L7 is a concave surface; the second side S15 of the eighth lens L8 is a convex surface; the first side S12 of the seventh lens L7 has at least one inflection point, and the second side S15 of the eighth lens L8 has no inflection point.

[0444] Table 49 shows the basic parameter table of the optical lens of Example 25.

[0445] Table 49

[0446]

[0447] In Example 25, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are all aspherical surfaces. Table 50-1 and Table 50-2 give the conic coefficients k and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of the aspherical surfaces S3, S4, S12, S13, S14 and S15 that can be used in Example 25.

[0448] Table 50-1

[0449]

[0450] Table 50-2

[0451]

[0452] The optical lens given in Example 25 has good imaging quality and can achieve a high resolution of five million pixels.

[0453] Embodiment 26

[0454] The optical lens according to Embodiment 26 of the present application is described below. Figure 32 The optical lens according to Embodiment 26 of the present application is described below. Figure 32 As shown in the table, 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 first side S12 of the seventh lens L7 is a concave surface; the second side S15 of the eighth lens L8 is a convex surface; the first side S12 of the seventh lens L7 has at least one inflection point, and the second side S15 of the eighth lens L8 has no inflection point.

[0455] Table 51 shows the basic parameter table of the optical lens of Embodiment 26.

[0456] Table 51

[0457]

[0458] In Embodiment 26, the first side S3 and the second side S4 of the second lens L2, the first side S12 and the second side S13 of the seventh lens L7, and the first side S14 and the second side S15 of the eighth lens L8 are aspherical surfaces. Table 52-1 and Table 52-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical surfaces S3, S4, S12, S13, S14, and S15 in Embodiment 26.

[0459] Table 52-1

[0460]

[0461] Table 52-2

[0462]

[0463] It has been found that the optical lens given in Embodiment 26 has good imaging quality and can achieve a high resolution of five million pixels.

[0464] Embodiment 27

[0465] The optical lens according to Embodiment 27 of the present application is described below. Figure 33 The optical lens according to Embodiment 27 of the present application is described below. Figure 33As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the first side surface S12 of the seventh lens L7 is concave; the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point, while the first side surface S14 and the second side surface S15 of the eighth lens L8 do not have an inflection point.

[0466] Table 53 shows the basic parameter table of the optical lens of Example 27.

[0467] Table 53

[0468]

[0469] In Example 27, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 54-1 and 54-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 27.

[0470] Table 54-1

[0471]

[0472] Table 54-2

[0473]

[0474] After testing, the optical lens provided in Example 27 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0475] Example 28

[0476] The following reference Figure 34 The optical lens according to embodiment 28 of the present application is described. Figure 34 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the first side surface S12 of the seventh lens L7 is concave; the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point, while the first side surface S14 and the second side surface S15 of the eighth lens L8 do not have an inflection point.

[0477] Table 55 shows the basic parameter table of the optical lens of Example 28.

[0478] Table 55

[0479]

[0480] In Example 28, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 56-1 and 56-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 28.

[0481] Table 56-1

[0482]

[0483] Table 56-2

[0484]

[0485] After testing, the optical lens provided in Example 28 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0486] Example 29

[0487] The following reference Figure 35 The optical lens according to embodiment 29 of the present application is described. Figure 35 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the first side surface S12 of the seventh lens L7 is concave; the eighth lens L8 has negative optical power, and the first side surface S14 of the eighth lens L8 is concave; the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point, while the first side surface S14 of the eighth lens L8 does not have an inflection point.

[0488] Table 57 shows the basic parameter table of the optical lens of Example 29.

[0489] Table 57

[0490]

[0491] In Example 29, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 58-1 and 58-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 29.

[0492] Table 58-1

[0493]

[0494] Table 58-2

[0495]

[0496] After testing, the optical lens provided in Example 29 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0497] Example 30

[0498] The following reference Figure 36 The optical lens according to embodiment 30 of the present application is described. Figure 36 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the eighth lens L8 has negative optical power, and the first side surface S14 of the eighth lens L8 is concave; the second side surface S13 of the seventh lens L7 has at least one inflection point, while the first side surface S14 of the eighth lens L8 has no inflection point. Table 59 shows the basic parameters of the optical lens of Example 30.

[0499] Table 59

[0500]

[0501] In Example 30, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 60-1 and 60-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 30.

[0502] Table 60-1

[0503]

[0504] Table 60-2

[0505]

[0506] After testing, the optical lens provided in Example 30 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0507] Example 31

[0508] The following reference Figure 37 The optical lens according to embodiment 31 of the present application is described. Figure 37 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the radius of curvature of each lens surface and lens thickness are different; the first side surface S12 of the seventh lens L7 is concave; the eighth lens L8 has negative optical power, and the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point, while the first side surface S14 and the second side surface S15 of the eighth lens L8 do not have an inflection point. Table 61 shows the basic parameters of the optical lens of Example 31.

[0509] Table 61

[0510]

[0511] In Example 31, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 62-1 and 62-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 31.

[0512] Table 62-1

[0513]

[0514] Table 62-2

[0515]

[0516] After testing, the optical lens provided in Example 31 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0517] Example 32

[0518] The following reference Figure 38 The optical lens according to embodiment 32 of the present application is described. Figure 38 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and lens thickness are different; the first side surface S12 of the seventh lens L7 is concave; the eighth lens L8 has negative optical power, and the first side surface S14 of the eighth lens L8 is concave, and the second side surface S15 of the eighth lens L8 is convex; the first side surface S12 and the second side surface S13 of the seventh lens L7 have at least one inflection point, while the first side surface S14 and the second side surface S15 of the eighth lens L8 do not have an inflection point.

[0519] Table 63 shows the basic parameter table of the optical lens of Example 32.

[0520] Table 63

[0521]

[0522] In Example 32, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 64-1 and 64-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 32.

[0523] Table 64-1

[0524]

[0525] Table 64-2

[0526]

[0527] After testing, the optical lens provided in Example 32 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0528] Example 33

[0529] The following reference Figure 39 The optical lens according to embodiment 33 of the present application is described. Figure 39 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the eighth lens L8 has negative optical power; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0530] Table 65 shows the basic parameter table of the optical lens of Example 33.

[0531] Table 65

[0532]

[0533] In Example 33, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Tables 66-1 and 66-2 list the conic coefficients k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Example 33.

[0534] Table 66-1

[0535]

[0536] Table 66-2

[0537]

[0538] After testing, the optical lens provided in Example 33 has good imaging quality and can achieve a high resolution of 5 million pixels.

[0539] Example 34

[0540] The following reference Figure 40 The optical lens according to embodiment 34 of the present application is described. Figure 40 As shown, the main differences between this embodiment and Example 1 are: the optical parameters such as the curvature radius of each lens surface and the lens thickness are different; the eighth lens L8 has negative optical power; and the second side surface S13 of the seventh lens L7 has at least one inflection point.

[0541] Table 67 shows the basic parameter table of the optical lens of Example 34.

[0542] Table 67

[0543]

[0544] In Embodiment 34, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S12 and the second side surface S13 of the seventh lens L7, and the first side surface S14 and the second side surface S15 of the eighth lens L8 are all aspherical surfaces. Table 68-1 and Table 68-2 give the conic coefficients k and the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S3, S4, S12, S13, S14, and S15 that can be used in Embodiment 34.

[0545] Table 68-1

[0546]

[0547] Table 68-2

[0548]

[0549] It has been tested that the optical lens given in Embodiment 34 has good imaging quality and can achieve a high resolution of five million pixels.

[0550] Table 69-1 to Table 69-5 give the basic parameters of the optical lenses in Embodiments 1 to 34, such as F7, F8, F, R41, R42, d8, SAG82, SAG81, D, TTL, D82, d78, F5, F6, F1, F4, F2, H, FOV, F56, BFL, TL, R11, F3, ENPD, d56, CT37, L37, and θ. The unit of the parameter FOV in the table is °, the parameter θ is the radian value corresponding to the parameter FOV, and the units of the other parameters are mm.

[0551] Table 69-1

[0552]

[0553] Table 69-2

[0554]

[0555] Table 69-3

[0556]

[0557] Table 69-4

[0558]

[0559] Table 69-5

[0560]

[0561] In summary, the relationship of each of Embodiments 1 to 34 satisfies the relationships shown in Tables 70-1 to 70-5.

[0562] Table 70-1

[0563]

[0564] Table 70-2

[0565]

[0566] Table 70-3

[0567]

[0568] Table 70-4

[0569]

[0570] Table 70-5

[0571]

[0572] The present application also provides an electronic device comprising the optical lens and at least one of an imaging element and a light source in the above example embodiments; wherein the imaging element is configured to convert an optical image or optical information formed by the optical lens into an electrical signal; and wherein the light source is located on the second side of the optical lens, and light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0573] Notably, the electronic device can be implemented as a laser radar, a camera or a projection lamp, but is not limited thereto. Accordingly, the optical lens can be used as a light emitting lens or a light receiving lens. For example, in the case that the electronic device is a camera, the electronic device can comprise the optical lens and a photosensor configured to convert an optical image formed by the optical lens into an electrical signal in the above example embodiments, and the photosensor is disposed on the second side of the optical lens, for example, on an imaging surface, and can be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0574] In the case that the electronic device is a projection lamp, the electronic device can comprise the optical lens and a light source in the above example embodiments, and the light source is located on the second side of the optical lens. Light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, and forms an image or illuminates an area on the first side of the optical lens.

[0575] In addition, when the electronic device is a laser radar, the receiving end lens of the laser radar can be implemented as the above-mentioned optical lens, the first side of the optical lens is the object side, and the second side of the optical lens is the image side.

[0576] It is worth noting that the electronic device implemented as a laser radar may include a first device and a second device, the first device may be implemented as a laser radar transmitting device, and the second device may be implemented as a laser radar receiving device. The first device may include the optical lens and light source in the above exemplary embodiment, the light source is located on the second side of the optical lens, the light emitted by the light source passes through the optical lens and is projected onto the first side of the optical lens, and forms an image or illuminates an area on the first side. The second device may include the optical lens in the above exemplary embodiment and a photoelectric sensor for converting the optical image formed by the optical lens into an electrical signal, the photoelectric sensor is disposed on the second side of the optical lens (for example, on the imaging surface), the photoelectric sensor may be implemented as a photocoupler (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.

[0577] It is worth mentioning that the present application also provides a vehicle, which may include the above-mentioned electronic device for obtaining information.

[0578] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of this application is not limited to technical solutions formed by a specific combination of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the scope of this application. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that: The device comprises, in order from the first side to the second side along the optical axis: a first lens having negative optical power, wherein the second side surface of the first lens is concave; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power, wherein the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex; a fifth lens having optical power; a sixth lens having optical power, the sixth lens being cemented with the fifth lens to form a cemented lens, the optical power of the sixth lens and the fifth lens having opposite signs; a seventh lens having negative optical power, wherein the second side surface of the seventh lens is concave; and an eighth lens having optical power; Wherein, the number of lenses having optical power in the optical lens is eight; The optical lens satisfies the following requirements: -1.85≤F1 / F≤-0.8, 0<|F / F2|≤0.35, 0.24≤D / TTL≤0.35, 0.5≤d8 / (d8+SAG82-SAG81)≤1.75, and 0<|F / F56|≤0.25; Among them, F1 is the effective focal length of the first lens, F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, D is the clear aperture on the first side of the first lens corresponding to the maximum field of view angle of the optical lens; TTL is the total optical length of the optical lens, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the sag of the second side of the eighth lens, SAG81 is the sag of the first side of the eighth lens, and F56 is the combined focal length of the fifth lens and the sixth lens.

2. The optical lens according to claim 1, wherein: The first side surface of the first lens is a convex surface or a concave surface.

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

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

5. The optical lens according to claim 1, wherein: The fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex; Alternatively, the fifth lens has negative optical power, the first side surface of the fifth lens is convex or concave, and the second side surface of the fifth lens is concave.

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

7. The optical lens according to claim 1, wherein: The first side surface of the seventh lens is a convex surface or a concave surface.

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

9. The optical lens according to any one of claims 1 to 8, wherein: A curvature radius R41 of the first side surface of the fourth lens and a curvature radius R42 of the second side surface of the fourth lens satisfy: -2.75≤R41 / R42≤-0.

5.

10. The optical lens according to any one of claims 1 to 8, wherein: The effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy the following: 1.1≤F4 / F≤4.

4.

11. The optical lens according to any one of claims 1 to 8, wherein: The maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following conditions: 50°≤(FOV×F) / H≤75°.

12. The optical lens according to any one of claims 1 to 8, wherein: 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 satisfy the following: 0.5≤F / H≤0.

73.

13. The optical lens according to any one of claims 1 to 8, wherein: The total optical length TTL of the optical lens and the total effective focal length F of the optical lens satisfy the following conditions: 4.0≤TTL / F≤5.

6.

14. The optical lens according to any one of claims 1 to 8, wherein: The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: 1.5≤F / ENPD≤1.

7.

15. The optical lens according to any one of claims 1 to 8, wherein: An axial distance d56 from the second side surface of the fifth lens to the first side surface of the sixth lens and a total optical length TTL of the optical lens satisfy the following: 0≤d56 / TTL≤0.

002.

16. The optical lens according to any one of claims 1 to 8, wherein: The sum of the center thicknesses CT37 of the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens on the optical axis and the on-axis distance L37 from the first side surface of the third lens to the second side surface of the seventh lens satisfy the following: 0.85≤CT37 / L37≤0.

99.

17. The optical lens according to any one of claims 1 to 8, wherein: 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 arc value θ of the maximum field angle of the optical lens satisfy the following conditions: 0.58≤(H / 2) / (F×tan(θ / 2))≤0.

75.

18. The optical lens according to any one of claims 1 to 8, wherein: The optical lens satisfies at least one of the following relationships: 0<|F7 / F8|≤3.5, -3≤F7 / F8<0, -28≤F7 / F≤-2.5, 1.8≤R41 / F≤9.5, -6≤R42 / F≤-1.25, 0.27≤D82 / TTL≤0.42, 0.022≤d78 / TTL≤0.072, 0.64≤|F5 / F 6|≤1.55, 0.004≤D / H / FOV×1°≤0.014, 2.4≤TTL / H≤3.4, 0.05≤BFL / TL≤0.135, 2.8≤|R11 / F|≤70, 0.42≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤1.3, 0.8≤D82 / H≤1.25 and 1.9≤|F8 / F|; Wherein, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F is the total effective focal length of the optical lens, R41 is the curvature radius of the first side surface of the fourth lens, R42 is the curvature radius of the second side surface of the fourth lens, D82 is the clear aperture on the second side surface of the eighth lens corresponding to the maximum field angle of the optical lens, d78 is the on-axis distance from the second side surface of the seventh lens to the first side surface of the eighth lens, TTL is the total optical length of the optical lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens D is the effective focal length of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, BFL is the optical back focus of the optical lens, TL is the axial distance from the first side surface of the first lens to the second side surface of the eighth lens, R11 is the radius of curvature of the first side surface of the first lens, F4 is the effective focal length of the fourth lens, F56 is the combined focal length of the fifth lens and the sixth lens, and F3 is the effective focal length of the third lens.

19. The optical lens according to any one of claims 1 to 8, wherein: The optical lens satisfies at least one of the following relationships: 0.025≤|F7 / F8|≤2.8, -2.8≤F7 / F8≤-0.03, -24≤F7 / F≤-2.75, -2.5≤R41 / R42≤-0.55, 2≤R41 / F≤9, -5.7≤R42 / F≤-1.4, 0.65≤d8 / (d8+SAG82-S AG81)≤1.55, 0.27≤D / TTL≤0.34, 0.3≤D82 / TTL≤0.38, 0.025≤d78 / TTL≤0.068, 0.7 ≤|F5 / F6|≤1.4, -1.7≤F1 / F≤-0.9, 1.2≤F4 / F≤4, 0.005≤|F / F2|≤0.33, 0.007≤D / H / F OV×1°≤0.012, 0.001≤|F / F56|≤0.175, 55°≤(FOV×F) / H≤70°, 2.7≤TTL / H≤3.2, 0.0 55≤BFL / TL≤0.125, 3≤|R11 / F|≤65, 0.48≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤1.15, 0.55≤ F / H≤0.68, 4.2≤TTL / F≤5.2, 1.55≤F / ENPD≤1.68, 0.85≤D82 / H≤1.15, 0≤d56 / TTL≤0 .001, 0.86≤CT37 / L37≤0.985, 2.1≤|F8 / F|≤200 and 0.62≤(H / 2) / (F×tan(θ / 2))≤0.7; Among them, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F is the total effective focal length of the optical lens, R41 is the curvature radius of the first side surface of the fourth lens, R42 is the curvature radius of the second side surface of the fourth lens, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the sag of the second side surface of the eighth lens, SAG81 is the sag of the first side surface of the eighth lens, D is the clear aperture on the first side surface of the first lens corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, D82 is the clear aperture on the second side surface of the eighth lens corresponding to the maximum field of view of the optical lens, d78 is the on-axis distance from the second side surface of the seventh lens to the first side surface of the eighth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F1 is the effective focal length of the first lens, and F4 is the total optical length of the optical lens. wherein the effective focal length of the fourth lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, F56 is the combined focal length of the fifth lens and the sixth lens, BFL is the optical back focus of the optical lens, TL is the on-axis distance from the first side surface of the first lens to the second side surface of the eighth lens, R11 is the radius of curvature of the first side surface of the first lens, F3 is the effective focal length of the third lens, ENPD is the entrance pupil diameter of the optical lens, d56 is the on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens, CT37 is the sum of the center thicknesses of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis, L37 is the on-axis distance from the first side surface of the third lens to the second side surface of the seventh lens, and θ is the radian value of the maximum field of view of the optical lens.

20. The optical lens according to any one of claims 1 to 8, wherein: The optical lens satisfies at least one of the following relationships: 0.065≤|F7 / F8|≤2.663, -2.663≤F7 / F8<-0.065, -21.226≤F7 / F≤-3.071, -2.364≤R41 / R42≤-0.688, 2.328≤R41 / F≤7.888, -4.991≤R42 / F≤-1.651, 0.761≤d8 / (d8+SAG 82-SAG81)≤1.309, 0.299≤D / TTL≤0.332, 0.322≤D82 / TTL≤0.365, 0.027≤d78 / TTL≤0.063, 0.75 1≤|F5 / F6|≤1.227, -1.558≤F1 / F≤-1.027, 1.405≤F4 / F≤3.739, 0.019≤|F / F2|≤0.321, 0.009≤D / H / FOV×1°≤0.010, 0.002≤|F / F56|≤0.114, 60.890°≤(FOV×F) / H≤64.267°, 2.875≤TTL / H≤2.958 , 0.068≤BFL / TL≤0.113, 3.487≤|R11 / F|≤60.917, 0.504≤(1 / F4+1 / F56+1 / F3) / (1 / F)≤0.992, 0. 599≤F / H≤0.632, 4.681≤TTL / F≤4.867, 1.62≤F / ENPD≤1.64, 0.931≤D82 / H≤1.053, 0≤d56 / TTL≤0 .0006, 0.866≤CT37 / L37≤0.982, 2.333≤|F8 / F|≤174.813 and 0.644≤(H / 2) / (F×tan(θ / 2))≤0.680; Among them, F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, F is the total effective focal length of the optical lens, R41 is the curvature radius of the first side surface of the fourth lens, R42 is the curvature radius of the second side surface of the fourth lens, d8 is the center thickness of the eighth lens on the optical axis, SAG82 is the sag of the second side surface of the eighth lens, SAG81 is the sag of the first side surface of the eighth lens, D is the clear aperture on the first side surface of the first lens corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, D82 is the clear aperture on the second side surface of the eighth lens corresponding to the maximum field of view of the optical lens, d78 is the on-axis distance from the second side surface of the seventh lens to the first side surface of the eighth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F1 is the effective focal length of the first lens, and F4 is the total optical length of the optical lens. wherein the effective focal length of the fourth lens, F2 is the effective focal length of the second lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, F56 is the combined focal length of the fifth lens and the sixth lens, BFL is the optical back focus of the optical lens, TL is the on-axis distance from the first side surface of the first lens to the second side surface of the eighth lens, R11 is the radius of curvature of the first side surface of the first lens, F3 is the effective focal length of the third lens, ENPD is the entrance pupil diameter of the optical lens, d56 is the on-axis distance from the second side surface of the fifth lens to the first side surface of the sixth lens, CT37 is the sum of the center thicknesses of the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis, L37 is the on-axis distance from the first side surface of the third lens to the second side surface of the seventh lens, and θ is the radian value of the maximum field of view of the optical lens.

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

Images